CN117478284A

CN117478284A - Information indication method, device and readable storage medium

Info

Publication number: CN117478284A
Application number: CN202210867896.8A
Authority: CN
Inventors: 高翔; 刘显达; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2024-01-30
Also published as: WO2024016977A1

Abstract

The embodiment of the application discloses an information indication method, an information indication device and a readable storage medium, wherein the method comprises the following steps: the base station sends first indication information and second indication information, wherein the first indication information is at least provided with one value and is used for indicating a plurality of combinations of rank and a TPMI index, the second indication information indicates a DMRS port index, the DMRS port index is associated with the first combination in the plurality of combinations when the value of the second indication information is the value in the first set, and the DMRS port index is associated with the second combination in the plurality of combinations when the value of the second indication information is the value in the second set; the UE combines the two indication information to determine the unique rank, the TPMI index and the corresponding DMRS port index indicated by the base station. By adopting the embodiment of the application, the combined indication of the rank and the TPMI index of the antenna port larger than 4 and the indication of the DMRS port index can be supported, and the indication overhead can be reduced.

Description

Information indication method, device and readable storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an information indication method, an information indication device, and a readable storage medium.

Background

For uplink transmission, the sending behavior of the terminal device is scheduled by the network device. The network device may inform the terminal device of the number of transport streams (also referred to as the number of transport layers, the number of spatial layers or rank) for transmitting uplink data, the transmit precoding matrix indicator (transmitted precoding matrix indicator, TPMI) index, and the corresponding demodulation reference signal (dedicated demodulation reference signal, DMRS) port index through the indication information. The TPMI index is used to identify a precoding matrix used for uplink transmission. The DMRS port index is used to identify DMRS ports, one DMRS port (DMRS port) corresponding to one spatial layer. For multiple-input multiple-output (multiple input multiple output, MIMO) transmission with a number of transmission layers R, the number of DMRS ports required is R.

In the new generation radio access technology (new radio access technology, NR/5G) protocol, a terminal device can only support uplink transmission of 4 layers (i.e., rank=4) at maximum. But as the capabilities of the terminal devices are further improved, terminal devices with more than 4 (e.g., 8) transmit antennas are increasing. And the maximum supportable transmission layer number (i.e., rank) of the terminal equipment with more than 4 antennas is also more than 4, for example, the terminal equipment with 8 antennas can support uplink transmission with 8 layers (i.e., rank=8). Therefore, in order to support uplink transmission of more than 4 layers, the indication of TPMI index and DMRS port index of more than 4 antenna ports is to be explored.

Disclosure of Invention

The embodiment of the application provides an information indication method, an information indication device and a readable storage medium, which can support the combined indication of the transmission layer number and the TPMI index of more than 4 antenna ports and the indication of the DMRS port index, such as the combined indication of the transmission layer number (maximum 8 layers) and the TPMI index of 8 antenna ports and the indication of the DMRS port index of 8 antenna ports, and can reduce the indication cost.

The present application is described below in terms of various aspects, it being understood that the embodiments and advantages of the various aspects described below may be referenced to one another.

In a first aspect, the present application provides an information indication method, including: the network device transmits the first indication information and the second indication information. The first indication information is used for indicating a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, for example, the transmission layer number is the same as the layer number of the precoding matrix identified by the TPMI index. The first indication information has at least a first value indicating a plurality of combinations of a transmission layer number and a TPMI index, and one transmission layer number and a TPMI index corresponding to the transmission layer number are one combination. The plurality of combinations includes a first combination and a second combination. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the value of the second indication information is the value in the first set, the DMRS port indexes indicated by the second indication information are associated with the first combination, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the first combination; when the value of the second indication information is the value in the second set, the DMRS port indexes indicated by the second indication information are associated with the second combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the second combination.

The present application makes the first indication information have at least one value, and the value indicates a plurality of combinations of the transmission layer number and the TPMI index, so that not only can the combined indication of the transmission layer number (maximum 8 layers) and the TPMI index greater than 4 antenna ports (such as 8 antenna ports) be supported, but also the indication overhead is reduced compared with a mode that one value indicates one combination of the transmission layer number and the TPMI index. According to the method and the device, the DMRS port indexes corresponding to two different transmission layers are encoded in one table, different values are utilized to indicate the DMRS port indexes corresponding to the different transmission layers, not only can the indication of the DMRS port indexes of more than 4 antenna ports (such as 8 antenna ports) be supported, but also 4 DMRS port index tables are not required to be additionally added, bit overhead of the DMRS port indication is not increased, and redundant indication bits in the DMRS port index tables can be reduced.

In a second aspect, the present application provides an information indication method, the method including: the terminal device receives the first indication information and the second indication information, and determines a combination from among a plurality of combinations of the number of transmission layers and the TPMI index according to a value of the second indication information. The first indication information is used for indicating a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, for example, the transmission layer number is the same as the layer number of the precoding matrix identified by the TPMI index. The first indication information has at least a first value indicating a plurality of combinations of a transmission layer number and a TPMI index, and one transmission layer number and a TPMI index corresponding to the transmission layer number are one combination. The plurality of combinations includes a first combination and a second combination. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the second indication information is a value in the first set, the DMRS port indexes indicated by the second indication information are associated with the first combination, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the first combination; when the second indication information is a value in the second set, the DMRS port indexes indicated by the second indication information are associated with a second combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the second combination.

The terminal device in this embodiment of the present application determines one or more rank values and TPMI indexes corresponding to the one or more rank values respectively through the value of the first indication information, and then determines a specific (or unique) rank value and DMRS port index according to the value of the second indication information, and further determines the TPMI index corresponding to the rank value. The method not only can support the combined indication of the transmission layer number and the TPMI index of the port (such as the port with 8 antennas) with more than 4 antennas and the indication of the index of the port with DMRS, reduce the indication cost, but also can support the uplink transmission with more than 4 layers, thereby improving the transmission performance.

With reference to the first aspect or the second aspect, in one possible implementation manner, the number of transmission layers in the first combination is one of 1,2,3, and 4, and the number of transmission layers in the second combination is one of 5,6,7, and 8. In other words, there is a correspondence between the number of transmission layers in the first combination and the number of transmission layers in the second combination.

Optionally, when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5; when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 6; when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 7; when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 8.

Alternatively, when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8; when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7; when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6; when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

The method comprises the steps of establishing a corresponding relation between rank=1-4 and rank=5-8, and enabling first indication information to have at least one value based on the corresponding relation, wherein the value indicates a plurality of combinations of transmission layer numbers and TPMI indexes; in addition, the DMRS port indexes corresponding to the two ranks with the corresponding relation are encoded in a table, and different values are utilized to indicate the DMRS port indexes corresponding to the different ranks; the method not only can support the combined indication of the transmission layer number (1 layer to 8 layers) of the 8-antenna port and the TPMI index and the indication of the DMRS port index of the 8-antenna port, but also can reduce the indication overhead under the condition of not affecting the compatibility.

With reference to the first aspect or the second aspect, in one possible implementation manner, the first indication information and the second indication information are carried in downlink control information (downlink control information, DCI) signaling. For example, the first indication information may be a precoding information and layer number (precoding information and number of layers) field in DCI signaling, which is used to indicate a combination of a transport layer number (i.e., rank) and a TPMI index corresponding to the transport layer number; the second indication information may be an antenna port (antenna port) field in DCI signaling for indicating the DMRS port index.

In a third aspect, the present application provides a communication apparatus, in particular a network device or a chip therein, for performing the method of the first aspect or any possible implementation of the first aspect. The communication device comprises a unit with means for performing the method of the first aspect or any possible implementation of the first aspect.

In a fourth aspect, the present application provides a communication device, in particular a terminal device or a chip therein, for performing the method of the second aspect or any possible implementation of the second aspect. The communication device comprises a unit with means for performing the second aspect or any possible implementation of the second aspect.

In the third or fourth aspect, the communication apparatus may include a transceiver unit and a processing unit. Reference may also be made to the device embodiments shown below for a specific description of the transceiver unit and the processing unit. Advantageous effects of the above third aspect to the fourth aspect may be referred to the relevant descriptions of the above first aspect and the second aspect, and are not repeated here.

In a fifth aspect, the present application provides an information indicating method, including: the network device sends the first indication information and the third indication information. The first indication information is used for indicating a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, for example, the transmission layer number is the same as the layer number of the precoding matrix identified by the TPMI index. The first indication information has at least a first value indicating a plurality of combinations of a transmission layer number and a TPMI index, and one transmission layer number and a TPMI index corresponding to the transmission layer number are one combination. The third indication information indicates one of the plurality of combinations.

The method comprises the steps that at least one value exists in first indication information, the value indicates a plurality of combinations of transmission layer numbers and TPMI indexes, and the third indication information indicates which combination of the plurality of combinations is distributed to terminal equipment by network equipment; the combined indication of the transmission layer number and the TPMI index of the port with the antenna number larger than 4 can be supported, the indication overhead is reduced, the uplink transmission with the antenna number larger than 4 can be supported, and the transmission performance can be improved.

With reference to the fifth aspect, in a possible implementation manner, the plurality of combinations includes a first combination and a second combination. The third indication information may indicate a first combination of the plurality of combinations by indicating that one of the two codewords is enabled, and the third indication information may indicate a second combination of the plurality of combinations by indicating that both codewords are enabled.

Optionally, the third indication information is one or more of a modulation and coding scheme (modulation and coding scheme, MCS) field, a redundancy version (redundancy version) field, and a new data indication (new data indicator) field in DCI signaling, such as the MCS field and the redundancy version field. For example, the MCS field and the redundancy version field corresponding to one codeword in DCI signaling may be valued as a preset value or a special value to indicate that the codeword (coded) is not enabled (disabled). It can be understood that the DCI signaling includes an MCS field, a redundancy version field, and a new data indication field, which respectively correspond to the two codewords. When the MCS field corresponding to a certain codeword in DCI signaling takes a special value (e.g. 26) and the redundancy version field corresponding to the codeword takes a special value (e.g. 1), the method is used for jointly indicating that the codeword (coded) is not enabled (disabled); and when the MCS field corresponding to a certain codeword in the DCI signaling is not 26 or the redundancy version field corresponding to the codeword is not 1, it indicates that the codeword is enabled (enabled), where the MCS field corresponding to the codeword is used to indicate the scheduled MCS index and the redundancy version field corresponding to the codeword is used to indicate the encoded redundancy version information corresponding to the scheduled data.

With reference to the fifth aspect, in a possible implementation manner, the method further includes: the network device transmits the second indication information. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the value of the second indication information is the value in the first set, the DMRS port index indicated by the second indication information is associated with the first combination of the plurality of combinations, for example, the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the first combination; when the value of the second indicator information is the value in the second set, the DMRS port index indicated by the second indicator information is associated with the second combination of the plurality of combinations, for example, the number of DMRS port indexes indicated by the second indicator information is the same as the number of transmission layers (i.e., rank) in the second combination.

According to the method and the device, the DMRS port indexes corresponding to two different transmission layers are encoded in one table, different values are utilized to indicate the DMRS port indexes corresponding to the different transmission layers, not only can indication of the DMRS port indexes of more than 4 antenna ports be supported, but also 4 DMRS port index tables are not required to be additionally added, bit overhead of the DMRS port indication is not increased, and redundant indication bits in the DMRS port index tables can be reduced.

In a sixth aspect, the present application provides an information indication method, including: the terminal device receives the first indication information and the third indication information, and determines a combination from a plurality of combinations of the transmission layer number and the TPMI index according to the third indication information. The first indication information is used for indicating a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, for example, the transmission layer number is the same as the layer number of the precoding matrix identified by the TPMI index. The first indication information has at least a first value indicating a plurality of combinations of a transmission layer number and a TPMI index, and one transmission layer number and a TPMI index corresponding to the transmission layer number are one combination. The third indication information indicates one of the plurality of combinations.

The terminal equipment determines one or more rank values and the corresponding TPMI indexes of the one or more rank values respectively through the value of the first indication information, and then determines a unique rank value and the corresponding TPMI index of the rank value according to the indication of the third indication information. The combined indication of the transmission layer number (maximum 8 layers) and the TPMI index of the port with the antenna number greater than 4 can be supported, the indication overhead is reduced, the uplink transmission with the antenna number greater than 4 can be supported, and the transmission performance can be improved.

With reference to the sixth aspect, in one possible implementation manner, the plurality of combinations includes a first combination and a second combination. The terminal device determines a combination from a plurality of combinations of the transmission layer number and the TPMI index according to the third indication information, including: when the third indication information indicates that one of the two codewords is enabled, the terminal device determines a first combination from the plurality of combinations; when the third indication information indicates that both codewords are enabled, the terminal device determines a second combination from the plurality of combinations.

Optionally, the third indication information is one or more of an MCS field, a redundancy version field, and a new data indication field in DCI signaling, such as the MCS field and the redundancy version field. It can be understood that the DCI signaling includes an MCS field, a redundancy version field, and a new data indication field, which respectively correspond to the two codewords. When the MCS field corresponding to a certain codeword in DCI signaling takes a special value (e.g. 26) and the redundancy version field corresponding to the codeword takes a special value (e.g. 1), the method is used for jointly indicating that the codeword (coded) is not enabled (disabled); and when the MCS field corresponding to a certain codeword in the DCI signaling is not 26 or the redundancy version field corresponding to the codeword is not 1, it indicates that the codeword is enabled (enabled), where the MCS field corresponding to the codeword is used to indicate the scheduled MCS index and the redundancy version field corresponding to the codeword is used to indicate the encoded redundancy version information corresponding to the scheduled data.

With reference to the sixth aspect, in one possible implementation manner, the method further includes: the terminal device receives the second indication information. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the value of the second indication information is the value in the first set, the DMRS port index indicated by the second indication information is associated with the first combination of the plurality of combinations, for example, the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the first combination; when the value of the second indicator information is the value in the second set, the DMRS port index indicated by the second indicator information is associated with the second combination of the plurality of combinations, for example, the number of DMRS port indexes indicated by the second indicator information is the same as the number of transmission layers (i.e., rank) in the second combination.

With reference to the fifth aspect or the sixth aspect, in one possible implementation manner, the number of transmission layers in the first combination is one of 1,2,3, and 4, and the number of transmission layers in the second combination is one of 5,6,7, and 8. In other words, there is a correspondence between the number of transmission layers in the first combination and the number of transmission layers in the second combination.

With reference to the fifth aspect or the sixth aspect, in one possible implementation manner, the first indication information is carried in DCI signaling. For example, the first indication information may be precoding information and a layer number field in DCI signaling, which are used to indicate a combination of a transmission layer number (i.e. rank) and a TPMI index corresponding to the transmission layer number.

In a seventh aspect, the present application provides a communication apparatus, in particular a network device or a chip therein, for performing the method of the fifth aspect or any possible implementation of the fifth aspect. The communication device comprises a unit with means for performing the fifth aspect or any possible implementation of the fifth aspect.

In an eighth aspect, the present application provides a communication device, in particular a terminal equipment or a chip therein, for performing the method of the sixth aspect or any possible implementation manner of the sixth aspect. The communication device comprises means with means for performing the method of the sixth aspect or any possible implementation of the sixth aspect.

In the seventh or eighth aspect, the communication apparatus may include a transceiver unit and a processing unit. Reference may also be made to the device embodiments shown below for a specific description of the transceiver unit and the processing unit. Advantageous effects of the seventh to eighth aspects described above may refer to the related descriptions of the fifth and sixth aspects described above, and are not repeated here.

In a ninth aspect, the present application provides an information indication method, including: the network device transmits the fourth indication information and the third indication information. The fourth indication information is used for indicating the DMRS port index. The fourth indication information has at least a second value, and the second value indicates a plurality of DMRS port index groups, each DMRS port index group including at least one DMRS port index. The third indication information indicates one DMRS port index group of the plurality of DMRS port index groups.

The method comprises the steps that at least one value exists in fourth indication information, the value indicates a plurality of DMRS port index groups (each DMRS port index group comprises at least one DMRS port index), and the third indication information indicates which one of the plurality of DMRS port index groups is allocated to the terminal equipment by the network equipment; not only can the DMRS port index indication of more than 4 antenna ports be supported, a DMRS port index table does not need to be additionally added, but also extra indication information overhead is not introduced, redundant indication bits can be reduced, uplink transmission of more than 4 layers can be supported, and further transmission performance can be improved.

With reference to the ninth aspect, in one possible implementation manner, the plurality of DMRS port index groups includes a first DMRS port index group and a second DMRS port index group. The third indication information indicates a first DMRS port index group of the plurality of DMRS port index groups by indicating that one of two codewords is enabled, and indicates a second DMRS port index group of the plurality of DMRS port index groups by indicating that both codewords are enabled.

Optionally, the third indication information is carried in DCI signaling, and the implementation manner of the third indication information may refer to the description of the fifth or sixth aspect, or refer to the description of the following embodiments, which are not repeated herein.

With reference to the ninth aspect, in a possible implementation manner, the method further includes: the network device sends first indication information. The first indication information is used for indicating a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, for example, the transmission layer number is the same as the layer number of the precoding matrix identified by the TPMI index. The first indication information has at least a first value indicating a plurality of combinations of a transmission layer number and a TPMI index, and one transmission layer number and a TPMI index corresponding to the transmission layer number are one combination. The plurality of combinations includes a first combination and a second combination. The first combination associates a first DMRS port index group of the plurality of DMRS port index groups, and the second combination associates a second DMRS port index group of the plurality of DMRS port index groups.

In a tenth aspect, the present application provides an information indication method, including: and the terminal equipment receives the fourth indication information and the third indication information, and determines one DMRS port index group from the plurality of DMRS port index groups indicated by the fourth indication information according to the third indication information. The fourth indication information is used for indicating the DMRS port index. The fourth indication information has at least a second value, and the second value indicates a plurality of DMRS port index groups, each DMRS port index group including at least one DMRS port index. The third indication information indicates one DMRS port index group of the plurality of DMRS port index groups.

The terminal equipment determines one or more DMRS port index groups through the value of the fourth indication information, and then determines one DMRS port index group according to the indication of the third indication information. Not only can the DMRS port index indication of more than 4 antenna ports be supported, a DMRS port index table does not need to be additionally added, but also extra indication information overhead is not introduced, redundant indication bits can be reduced, uplink transmission of more than 4 layers can be supported, and further transmission performance can be improved.

With reference to the tenth aspect, in one possible implementation manner, the plurality of DMRS port index groups includes a first DMRS port index group and a second DMRS port index group. The terminal device determines a DMRS port index group from a plurality of DMRS port index groups indicated by the fourth indication information according to the third indication information, including: when the third indication information indicates that one of the two codewords is enabled, the terminal device determines a first DMRS port index group from the plurality of DMRS port index groups; and when the third indication information indicates that the two codewords are enabled, the terminal equipment determines a second DMRS port index group from the plurality of DMRS port index groups.

With reference to the tenth aspect, in one possible implementation manner, the method further includes: the terminal equipment receives the first indication information and determines a combination from a plurality of combinations of the transmission layer number indicated by the first indication information and the TPMI index according to the third indication information. The first indication information is used for indicating a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, for example, the transmission layer number is the same as the layer number of the precoding matrix identified by the TPMI index. The first indication information has at least a first value indicating a plurality of combinations of a transmission layer number and a TPMI index, and one transmission layer number and a TPMI index corresponding to the transmission layer number are one combination. The plurality of combinations includes a first combination and a second combination. The first combination associates a first DMRS port index group of the plurality of DMRS port index groups, and the second combination associates a second DMRS port index group of the plurality of DMRS port index groups.

Optionally, when the third indication information indicates that one of the two codewords is enabled, the terminal device determines a first combination from the plurality of combinations; when the third indication information indicates that both codewords are enabled, the terminal device determines a second combination from the plurality of combinations.

The method comprises the steps that at least one value exists in first indication information, the value indicates a plurality of combinations of transmission layer numbers and TPMI indexes, and the third indication information indicates which combination of the plurality of combinations is distributed to terminal equipment by network equipment; the combined indication of the transmission layer number and the TPMI index of more than 4 antenna ports can be supported, and the indication overhead is reduced.

With reference to the ninth aspect or the tenth aspect, in one possible implementation manner, the number of transmission layers in the first combination is one of 1,2,3, and 4, and the number of transmission layers in the second combination is one of 5,6,7, and 8. In other words, there is a correspondence between the number of transmission layers in the first combination and the number of transmission layers in the second combination.

With reference to the ninth aspect or the tenth aspect, in one possible implementation manner, the fourth indication information is carried in DCI signaling. For example, the fourth indication information may be an antenna port field in DCI signaling for indicating the DMRS port index.

In an eleventh aspect, the present application provides a communication apparatus, in particular a network device or a chip therein, for performing the method of the ninth aspect or any possible implementation of the ninth aspect. The communication device comprises means with means for performing the method in the ninth aspect or any possible implementation of the ninth aspect.

In a twelfth aspect, the present application provides a communication device, in particular a terminal equipment or a chip therein, for performing the method of the tenth aspect or any possible implementation of the tenth aspect. The communication device comprises a unit with means for performing the method of the tenth aspect or any possible implementation of the tenth aspect.

In the eleventh or twelfth aspect, the communication device may include a transceiver unit and a processing unit. Reference may also be made to the device embodiments shown below for a specific description of the transceiver unit and the processing unit. Advantageous effects of the above eleventh aspect to twelfth aspect may refer to the relevant descriptions of the above ninth aspect and tenth aspect, and are not repeated here.

In a thirteenth aspect, the present application provides an information indicating method, including: the network device transmits the fifth indication information and the second indication information. The fifth indication information is used for indicating sounding reference signal (sounding reference signal, SRS) resource indexes, and the fifth indication information has at least a first value, wherein the first value indicates a plurality of SRS resource index groups, and each SRS resource index group comprises at least one SRS resource index. The plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The number of SRS resource indexes contained in the first SRS resource index group is equal to the first transmission layer number, and the number of SRS resource indexes contained in the second SRS resource index group is equal to the second transmission layer number. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the second indication information is a value in the first set, the DMRS port index indicated by the second indication information is associated with the first transmission layer number, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the first transmission layer number (i.e., rank); when the second indication information is a value in the second set, the DMRS port index indicated by the second indication information is associated with a second transmission layer number, for example, the number of DMRS port indexes indicated by the second indication information is the same as the second transmission layer number (i.e., rank).

According to the method and the device, the fifth indication information has at least one value, the value indicates a plurality of SRS resource index groups (each SRS resource index group comprises at least one SRS resource index), not only can the SRS resource index indication of 8 antenna ports be supported, but also the maximum 8-layer non-codebook transmission is supported, and further the transmission performance is improved; and the indication overhead is also reduced compared to the manner in which one value indicates one SRS resource index group. According to the method and the device, the DMRS port indexes corresponding to the two different transmission layers are encoded in one table, different values are utilized to indicate the DMRS port indexes corresponding to the different transmission layers, not only can the indication of the DMRS port indexes of more than 4 antenna ports be supported, but also 4 DMRS port index tables are not required to be additionally added, bit overhead of the DMRS port indication is not increased, and redundant indication bits in the DMRS port index tables can be reduced.

In a fourteenth aspect, the present application provides an information indicating method, including: the terminal device receives the fifth indication information and the second indication information, and determines an SRS resource index group from a plurality of SRS resource index groups indicated by the fifth indication information according to the value of the second indication information. The fifth indication information is used for indicating SRS resource indexes, and the fifth indication information has at least a first value, wherein the first value indicates a plurality of SRS resource index groups, and each SRS resource index group comprises at least one SRS resource index. The plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The number of SRS resource indexes contained in the first SRS resource index group is equal to the first transmission layer number, and the number of SRS resource indexes contained in the second SRS resource index group is equal to the second transmission layer number. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the second indication information is a value in the first set, the DMRS port index indicated by the second indication information is associated with the first transmission layer number, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the first transmission layer number (i.e., rank); when the second indication information is a value in the second set, the DMRS port index indicated by the second indication information is associated with a second transmission layer number, for example, the number of DMRS port indexes indicated by the second indication information is the same as the second transmission layer number (i.e., rank).

The terminal equipment determines one or more SRS resource index groups through the value of the fifth indication information, and then determines a specific (or unique) SRS resource index group according to the value of the second indication information; the SRS resource index indication of more than 4 SRS resources can be supported, so that non-codebook transmission of more than 4 layers is supported, and the transmission performance is improved.

With reference to the thirteenth aspect or the fourteenth aspect, in one possible implementation manner, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8.

Optionally, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8. For example, when the first transmission layer number is 1, the second transmission layer number is 5; when the first transmission layer number is 2, the second transmission layer number is 6; when the first transmission layer number is 3, the second transmission layer number is 7; when the first transmission layer number is 4, the second transmission layer number is 8.

Optionally, when the number of the first transmission layers is 1, the number of the second transmission layers is 8; when the first transmission layer number is 2, the second transmission layer number is 7; when the first transmission layer number is 3, the second transmission layer number is 6; when the first transmission layer number is 4, the second transmission layer number is 5.

With reference to the thirteenth aspect or the fourteenth aspect, in one possible implementation manner, the fifth indication information and the second indication information may be carried in DCI signaling. For example, the fifth indication information may be an SRS resource indication (SRS resource indicator, SRI) field in DCI signaling for indicating an SRS resource index; the second indication information may be an antenna port field in DCI signaling for indicating the DMRS port index.

In a fifteenth aspect, the present application provides a communication device, in particular a network apparatus or a chip therein, for performing the method of the thirteenth aspect or any possible implementation of the thirteenth aspect. The communication device comprises means with means for performing the method in the thirteenth aspect or any possible implementation of the thirteenth aspect.

In a sixteenth aspect, the present application provides a communication device, in particular a terminal device or a chip therein, for performing the method of the fourteenth aspect or any possible implementation of the fourteenth aspect. The communication device comprises means with means for performing the method in the fourteenth aspect or any possible implementation of the fourteenth aspect.

In a fifteenth or sixteenth aspect, the communication device may include a transceiver unit and a processing unit. Reference may also be made to the device embodiments shown below for a specific description of the transceiver unit and the processing unit. Advantageous effects of the fifteenth to sixteenth aspects described above may be referred to the relevant descriptions of the thirteenth and fourteenth aspects described above, and are not repeated here.

In a seventeenth aspect, the present application provides an information indicating method, including: the network device transmits the fifth indication information and the third indication information. The fifth indication information is used for indicating SRS resource indexes, and the fifth indication information has at least a first value, wherein the first value indicates a plurality of SRS resource index groups, and each SRS resource index group comprises at least one SRS resource index. The third indication information indicates one of the plurality of SRS resource index groups.

The method comprises the steps that at least one value exists in fifth indication information, the value indicates a plurality of SRS resource index groups (each SRS resource index group comprises at least one SRS resource index), and the third indication information indicates which SRS resource index group in the plurality of SRS resource index groups is allocated to the terminal equipment by the network equipment; not only can SRS resource index indication of more than 4 antenna ports be supported, but also non-codebook transmission of more than 4 layers is supported, and further transmission performance is improved; and the indication overhead is also reduced compared to the manner in which one value indicates one SRS resource index group.

With reference to the seventeenth aspect, in a possible implementation manner, the plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The third indication information indicates a first SRS resource index group of the plurality of SRS resource index groups by indicating that one codeword of two codewords is enabled, and indicates a second SRS resource index group of the plurality of SRS resource index groups by indicating that both codewords are enabled.

With reference to the seventeenth aspect, in a possible implementation manner, the method further includes: the network device transmits the second indication information. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the value of the second indication information is the value in the first set, the DMRS port index indicated by the second indication information is associated with the first transmission layer number, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the first transmission layer number (rank); when the value of the second indication information is the value in the second set, the DMRS port index indicated by the second indication information is associated with the second transmission layer number, for example, the number of DMRS port indexes indicated by the second indication information is the same as the second transmission layer number (i.e., rank). The plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The number of SRS resource indexes contained in the first SRS resource index group is equal to the first transmission layer number, and the number of SRS resource indexes contained in the second SRS resource index group is equal to the second transmission layer number.

According to the method and the device, the DMRS port indexes corresponding to two different transmission layers are encoded in one table, different values are utilized to indicate the DMRS port indexes corresponding to the different transmission layers, the indication of the DMRS port indexes of more than 4 antenna ports can be supported, the additional 4 DMRS port index tables are not needed, the bit cost of the DMRS port indication is not increased, and the redundant indication bits in the DMRS port index tables can be reduced.

In an eighteenth aspect, the present application provides an information indicating method, including: the terminal equipment receives the fifth indication information and the third indication information, and determines an SRS resource index group from a plurality of SRS resource index groups indicated by the fifth indication information according to the third indication information. The fifth indication information is used for indicating SRS resource indexes, and the fifth indication information has at least a first value, wherein the first value indicates a plurality of SRS resource index groups, and each SRS resource index group comprises at least one SRS resource index. The third indication information indicates one of the plurality of SRS resource index groups.

The terminal equipment determines one or more SRS resource index groups through the value of the fifth indication information, and then determines one SRS resource index group according to the indication of the third indication information; SRS resource index indication of more than 4 antenna ports can be supported, non-codebook transmission of more than 4 layers is supported, and further transmission performance is improved.

With reference to the eighteenth aspect, in one possible implementation manner, the plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The terminal device determines an SRS resource index group from a plurality of SRS resource index groups indicated by the fifth indication information according to the third indication information, including: when the third indication information indicates that one codeword of the two codewords is enabled, the terminal device determines a first SRS resource index group from the plurality of SRS resource index groups; when the third indication information indicates that both codewords are enabled, the terminal device determines a second SRS resource index group from the plurality of SRS resource index groups.

With reference to the eighteenth aspect, in a possible implementation manner, the method further includes: the terminal device receives the second indication information. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. The second indication information is used for indicating the DMRS port index. The value of the second indication information belongs to one of a plurality of sets including at least a first set and a second set. When the value of the second indication information is the value in the first set, the DMRS port index indicated by the second indication information is associated with the first transmission layer number, for example, the number of the DMRS port indexes indicated by the second indication information is the same as the first transmission layer number (rank); when the value of the second indication information is the value in the second set, the DMRS port index indicated by the second indication information is associated with the second transmission layer number, for example, the number of DMRS port indexes indicated by the second indication information is the same as the second transmission layer number (i.e., rank). The plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The number of SRS resource indexes contained in the first SRS resource index group is equal to the first transmission layer number, and the number of SRS resource indexes contained in the second SRS resource index group is equal to the second transmission layer number.

With reference to the seventeenth aspect or the eighteenth aspect, in one possible implementation manner, the first number of transmission layers is one of 1, 2, 3, and 4, and the second number of transmission layers is one of 5, 6, 7, and 8.

With reference to the seventeenth aspect or the eighteenth aspect, in one possible implementation manner, the fifth indication information is carried in DCI signaling. For example, the fifth indication information may be an SRS Resource Indication (SRI) field in DCI signaling.

In a nineteenth aspect, the present application provides a communication apparatus, in particular a network device or a chip therein, for performing the method of the seventeenth aspect or any possible implementation of the seventeenth aspect. The communication device comprises means with means for performing the seventeenth aspect or any possible implementation of the seventeenth aspect.

In a twentieth aspect, the present application provides a communication device, in particular a terminal device or a chip therein, for performing the method of the eighteenth aspect or any of the possible implementations of the eighteenth aspect. The communication device comprises a unit with means for performing the method of the eighteenth aspect or any possible implementation of the eighteenth aspect.

In the nineteenth or twentieth aspect, the communication device may include a transceiver unit and a processing unit. Reference may also be made to the device embodiments shown below for a specific description of the transceiver unit and the processing unit. Advantageous effects of the nineteenth to twentieth aspects described above may be referred to the relevant descriptions of the seventeenth and eighteenth aspects described above, and are not repeated here.

In a twenty-first aspect, the present application provides a communication apparatus, which is a network device, the communication apparatus comprising a processor configured to perform the method of the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any one of the foregoing aspects. Alternatively, the processor is configured to execute a program stored in the memory, which when executed performs the method according to the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any one of the foregoing aspects.

With reference to the twenty-first aspect, in a possible implementation manner, the memory is located outside the communication device.

With reference to the twenty-first aspect, in a possible implementation manner, the memory is located within the communication device.

In this application, the processor and the memory may also be integrated in one device, i.e. the processor and the memory may also be integrated together.

With reference to the twenty-first aspect, in a possible implementation manner, the communication device further includes a transceiver, and the transceiver is configured to send the indication information.

In a twenty-second aspect, the present application provides a communication apparatus, which is a terminal device, the communication apparatus comprising a processor configured to perform the method according to the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation manner of any one of the foregoing aspects. Alternatively, the processor is configured to execute a program stored in the memory, which when executed performs the method according to the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation manner of any of the foregoing aspects.

With reference to the twenty-second aspect, in a possible implementation manner, the memory is located outside the communication device.

With reference to the twenty-second aspect, in a possible implementation manner, the memory is located within the communication device.

With reference to the twenty-second aspect, in a possible implementation manner, the communication device further includes a transceiver, and the transceiver is configured to receive the indication information.

In a twenty-third aspect, the present application provides a communication device comprising logic circuitry and an interface, the logic circuitry and the interface being coupled.

In one design, a logic circuit is configured to generate first indication information and second indication information, where the first indication information is configured to indicate a combination of a transmission layer number and a TPMI index, the transmission layer number corresponds to the TPMI index, the first indication information has at least a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, and the plurality of combinations includes a first combination and a second combination; the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the value of the second indication information is the value in the first set, the DMRS port index is associated with the first combination, and when the value of the second indication information is the value in the second set, the DMRS port index is associated with the second combination; and the interface is used for outputting the first indication information and the second indication information.

In one design, a logic circuit is configured to generate first indication information and third indication information, where the first indication information is used to indicate a combination of a transmission layer number and a transmission precoding matrix indicator TPMI index, the transmission layer number corresponds to the TPMI index, the first indication information has at least a first value, and the first value indicates a plurality of combinations of the transmission layer number and the TPMI index; the third indication information indicates one of the plurality of combinations; and the interface is used for outputting the first indication information and the third indication information.

In one design, the logic is configured to generate fourth indication information and third indication information, where the fourth indication information is configured to indicate a DMRS port index of the demodulation reference signal, and the fourth indication information has at least a second value, where the second value indicates a plurality of DMRS port index groups, and each DMRS port index group includes at least one DMRS port index; the third indication information indicates one DMRS port index group of the plurality of DMRS port index groups; and the interface is used for outputting the fourth indication information and the third indication information.

In one design, logic circuitry is to generate fifth indication information and second indication information, where the fifth indication information is to indicate sounding reference signal SRS resource indexes, and the fifth indication information has at least a first value, where the first value indicates a plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index; the second indication information is used for indicating a demodulation reference signal (DMRS) port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with a first transmission layer number, and when the second indication information is the value in the second set, the DMRS port index is associated with a second transmission layer number; the plurality of SRS resource index groups include a first SRS resource index group and a second SRS resource index group, the number of SRS resource indexes included in the first SRS resource index group is equal to the first transmission layer number, and the number of SRS resource indexes included in the second SRS resource index group is equal to the second transmission layer number; and an interface for outputting the fifth indication information and the second indication information.

In one design, logic circuitry is to generate fifth indication information and third indication information, where the fifth indication information is to indicate sounding reference signal SRS resource indexes, and the fifth indication information has at least a first value, where the first value indicates a plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index; the third indication information indicates one SRS resource index group of the plurality of SRS resource index groups; and an interface for outputting the fifth indication information and the third indication information.

In a twenty-fourth aspect, the present application provides another communication device comprising logic circuitry and an interface, the logic circuitry and the interface coupled.

In one design, an interface is configured to input first indication information and second indication information, where the first indication information is configured to indicate a combination of a transmission layer number and a TPMI index, the transmission layer number corresponds to the TPMI index, the first indication information has at least a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, and the plurality of combinations includes a first combination and a second combination; the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the value of the second indication information is the value in the first set, the DMRS port index is associated with the first combination, and when the value of the second indication information is the value in the second set, the DMRS port index is associated with the second combination; logic circuitry for determining a combination from the plurality of combinations based on the value of the second indication information.

In one design, an interface is configured to input first indication information and third indication information, where the first indication information is configured to indicate a combination of a transmission layer number and a transmission precoding matrix indicator TPMI index, the transmission layer number corresponds to the TPMI index, and the first indication information has at least a first value, where the first value indicates a plurality of combinations of the transmission layer number and the TPMI index; logic circuitry for determining a combination from the plurality of combinations based on the third indication information.

In one design, the interface is configured to input fourth indication information and third indication information, where the fourth indication information is configured to indicate a DMRS port index of the demodulation reference signal, and the fourth indication information has at least a second value, where the second value indicates multiple DMRS port index groups, and each DMRS port index group includes at least one DMRS port index; and the logic circuit is used for determining one DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

In one design, an interface is configured to input fifth indication information and second indication information, where the fifth indication information is configured to indicate sounding reference signal SRS resource indexes, and the fifth indication information has at least a first value, where the first value indicates a plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index; the second indication information is used for indicating a demodulation reference signal (DMRS) port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with a first transmission layer number, and when the second indication information is the value in the second set, the DMRS port index is associated with a second transmission layer number; the plurality of SRS resource index groups include a first SRS resource index group and a second SRS resource index group, the number of SRS resource indexes included in the first SRS resource index group is equal to the first transmission layer number, and the number of SRS resource indexes included in the second SRS resource index group is equal to the second transmission layer number; logic circuitry is to determine one SRS resource index group from the plurality of SRS resource index groups based on the value of the second indication information.

In one design, an interface is configured to input fifth indication information and third indication information, where the fifth indication information is configured to indicate sounding reference signal SRS resource indexes, and the fifth indication information has at least a first value, where the first value indicates a plurality of SRS resource index groups, and each SRS resource index group includes at least one SRS resource index; logic circuitry is configured to determine, from the plurality of SRS resource index sets, one SRS resource index set according to the third indication information.

In a twenty-fifth aspect, embodiments of the present application provide a computer readable storage medium for storing a computer program which, when run on a computer, causes the method shown in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any one of the above aspects to be performed.

In a twenty-sixth aspect, embodiments of the present application provide a computer readable storage medium for storing a computer program which, when run on a computer, performs the method of the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation of any of the above aspects.

In a twenty-seventh aspect, embodiments of the present application provide a computer program product comprising a computer program or computer code which, when run on a computer, causes the method shown in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation of any of the above aspects to be performed.

In a twenty-eighth aspect, embodiments of the present application provide a computer program product comprising a computer program or computer code which, when run on a computer, causes the method shown in the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation of any of the above aspects to be performed.

In a twenty-ninth aspect, embodiments of the present application provide a computer program which, when run on a computer, performs the method of the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any of the above aspects.

In a thirty-first aspect, embodiments of the present application provide a computer program that, when run on a computer, performs the method of the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation of any of the above.

In a thirty-first aspect, an embodiment of the present application provides a wireless communication system, where the wireless communication system includes a network device and a terminal device, where the network device is configured to perform the method shown in the first aspect, the fifth aspect, the ninth aspect, the thirteenth aspect, the seventeenth aspect, or any possible implementation manner of any one of the foregoing aspects, and the terminal device is configured to perform the method shown in the second aspect, the sixth aspect, the tenth aspect, the fourteenth aspect, the eighteenth aspect, or any possible implementation manner of any one of the foregoing aspects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic architecture diagram of a communication system provided in an embodiment of the present application;

Fig. 2 is a simplified structural schematic diagram of a UE and a base station provided in an embodiment of the present application;

fig. 3 is a schematic diagram of an uplink transmission flow of a non-codebook according to an embodiment of the present application;

fig. 4 is a first flowchart of an information indication method provided in an embodiment of the present application;

fig. 5 is a second flowchart of an information indication method according to an embodiment of the present application;

fig. 6 is a third flowchart of an information indication method according to an embodiment of the present application;

fig. 7 is a fourth flowchart of an information indication method according to an embodiment of the present application;

fig. 8 is a fifth flowchart of an information indication method according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device 1000 provided in an embodiment of the present application;

fig. 11 is another schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c; a and b; a and c; b and c; or a and b and c. Wherein a, b and c can be single or multiple.

In the description of the present application, the words "first", "second", etc. are used merely to distinguish different objects, and are not limited in number and order of execution, and the words "first", "second", etc. are not necessarily different. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. Such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the list of steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "exemplary" or "such as" and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary," "for example," or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "by way of example," or "such as" is intended to present related concepts in a concrete fashion.

It should be understood that, in this application, "when …," "if," and "if" all refer to the corresponding processing that the device will perform under some objective condition, are not intended to limit the time, nor do they require that the device be implemented with a judging action, nor are they intended to imply that other limitations exist.

The term "simultaneously" in the present application is understood to mean at the same point in time, also during a period of time, and also during the same period, in particular in combination with the context.

Elements referred to in the singular are intended to be used in this application to mean "one or more" rather than "one and only one" unless specifically indicated.

In addition, the terms "system" and "network" are used interchangeably herein.

It should be understood that in embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

The technical solution of the embodiment of the present application may be applied to a communication system of various radio access technologies (radio access technology, RAT), for example: a long term evolution (long term evolution, LTE) system, a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th Generation,5G) system, such as a new generation radio access technology (new radio access technology, NR) communication system, a transition system between the LTE communication system and the 5G communication system (the transition system may also be referred to as a 4.5G communication system), a network in which a plurality of systems are integrated, an internet of things system, an internet of vehicles system, and the like; of course, future communication systems are also possible, such as sixth generation (6th generation,6G) and even seventh generation (7th generation,7G) systems.

It should be understood that, the network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and are not limited to the technical solution provided in the embodiments of the present application, and those of ordinary skill in the art can know that, with the evolution of the communication network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is equally applicable to similar technical problems.

In the embodiment of the present application, a part of the scenes are described by taking the scenes of the NR network in the wireless communication network as an example, and it should be understood that the solution in the embodiment of the present application may also be applied to other wireless communication networks, and the corresponding names may also be replaced by names of corresponding functions in other wireless communication networks.

Referring to fig. 1, fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system includes one or more network devices (e.g., base stations in fig. 1) and one or more terminal devices (e.g., UEs in fig. 1). The terminal device and the network device can perform wireless communication, one terminal device can perform uplink transmission with one network device or multiple network devices at the same time, and one network device can also perform downlink transmission with one terminal device or multiple terminal devices at the same time. For uplink transmission, the terminal device may configure one or more antennas for transceiving data/information; the network device may be configured with multiple antennas for transceiving data/information. It should be appreciated that the network device and the terminal device may also include a number of components (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, etc.) related to the transmission and reception of data/information. It should also be understood that fig. 1 is only a schematic diagram, and that other devices may be included in the communication system, such as a core network device, a wireless relay device, and/or a wireless backhaul device, which are not shown in fig. 1.

Optionally, the network device in the embodiment of the present application includes an access network device, for example, a Base Station (BS). The access network device may be a device that provides access to a terminal, and may include a radio access network (radio access network, RAN) device and AN Access Node (AN) device. The RAN device is mainly a wireless network device in a 3GPP network, and the AN device may be a non-3 GPP defined access network device. The RAN device is mainly responsible for radio resource management, quality of service (quality of service, qoS) management, data compression, encryption, and other functions on the air interface side. The RAN equipment may include various forms of base stations, such as macro base stations, micro base stations (also referred to as small stations), relay stations, access points, balloon stations, and the like. In systems employing different radio access technologies, the names of base station-capable devices may vary, e.g., in LTE systems, fifth generation (5th generation,5G), sixth generation (6th generation,6G), and even seventh generation (7th generation,7G) systems, the network devices may be referred to as: RAN or next-generation base station (next-generation Node base station, gNB), evolved NodeB (eNB or eNodeB), network device controller (base station controller, BSC), network device transceiver station (base transceiver station, BTS), home network device (e.g., home evolved Node B, or home Node B, HNB), baseband unit (BBU), access Point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, wireless relay Node, wireless backhaul Node, transceiver Node (transmission and reception point, TRP), transmission point (transmission point, TP), etc.; or one or a group of network devices (including multiple antenna panels) in a 5G system, or may also be a network node, such as a baseband unit (BBU), or a Distributed Unit (DU), or a car networking (vehicle to everything, V2X), or a Road Side Unit (RSU) in an intelligent driving scenario, constituting a gNB or a transmission point.

It may be appreciated that in the embodiment of the present application, the means for implementing the function of the network device may be the network device; or may be a device capable of supporting the network device to implement the function, such as a system on a chip, or a communication module, or a modem, etc., which may be installed in the network device. In the technical solution provided in the embodiments of the present application, the device for implementing the function of the network device is a network device, and the network device is a base station as an example, which describes the technical solution provided in the embodiments of the present application. The base stations may support networks of the same or different access technologies. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device.

In some deployments, the gNB or transmission point may include a Centralized Unit (CU), DU, and the like. The gNB or transmission point may also include a Radio Unit (RU). The CU implements part of the functions of the gNB or the transmission point, the DU implements part of the functions of the gNB or the transmission point, for example, the CU implements the functions of a radio resource control (radio resource control, RRC), a packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, and the DU implements the functions of a radio link control (radio link control, RLC), a medium access control (media access control, MAC), and a Physical (PHY) layer. Since the information of the RRC layer is eventually changed into or converted from the information of the physical layer, under this architecture, higher layer signaling, such as RRC layer signaling or PDCP layer signaling, may also be considered to be transmitted by the DU or by the du+ru. It is understood that the network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. Alternatively, the network device may be an auxiliary communication device, such as a satellite.

Alternatively, the terminal device in the embodiments of the present application may also be referred to as a terminal, a User Equipment (UE), a user terminal device (customer premise equipment, CPE), a Mobile Station (MS), a Mobile Terminal (MT), an access terminal device, an in-vehicle terminal, an industrial control terminal, a UE unit, a UE station, a remote terminal device, a mobile device, a UE agent, or a UE apparatus. The terminal equipment is equipment with a wireless receiving and transmitting function, can be deployed on land, and comprises indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in unmanned driving, a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart home), a wireless terminal in smart home (smart home), a wearable terminal device, or the like. The terminal device may be fixed or mobile.

It can be understood that in the embodiment of the present application, the device for implementing the function of the terminal may be the terminal; or may be a device capable of supporting the terminal to implement the function, such as a chip system, or a communication module, or a modem, etc., which may be installed in the terminal. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, the device for implementing the function of the terminal is the terminal, and the terminal is the UE as an example, which describes the technical solution provided in the embodiment of the present application. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

In some scenarios, the UE may also be used to act as a base station. For example, the UE may act as a scheduling entity that provides side-uplink signals between UEs in a vehicle-to-scheduling (V2X), device-to-device (D2D), or peer-to-peer (P2P), etc.

In some scenarios, the UE may also be used to act as a relay node. For example: the UE may act as a relay device (relay) or an access backhaul integrated (integrated access and backhaul, IAB) node for providing wireless backhaul services for the terminal device.

In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".

Referring to fig. 2, fig. 2 is a simplified structural schematic diagram of a UE and a base station according to an embodiment of the present application. For simplicity, fig. 2 only shows the main components of the base station 110 and the UE 120, and in practical applications, the base station and the UE may have more or less components than those shown in fig. 2, or may only include those shown in fig. 2. The following will briefly describe each component in fig. 2.

Base station 110 includes an interface 111 and a processor 112. The processor 112 may optionally store a program 114. The base station 110 optionally includes a memory 113. Memory 113 may optionally store program 115.UE 120 includes interface 121 and processor 122. The processor 122 may optionally store a program 124.UE 120 optionally includes memory 123. Memory 123 may optionally store program 125. These components work together to provide the various functions described in this application. For example, processor 112 and interface 111 work together to provide a wireless connection between base station 110 and UE 120. Processor 122 and interface 121 cooperate to enable downlink and/or uplink transmissions by UE 120.

A processor (e.g., processor 112 and/or processor 122) may include one or more processors and be implemented as a combination of computing devices. The processors (e.g., processor 112 and/or processor 122) may each include one or more of the following: microprocessors, microcontrollers, digital signal processors (digital signal processor, DSPs), digital signal processing devices (digital signal processing device, DSPD), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate arrays (field programmable gate array, FPGA), programmable logic devices (programmable logic device, PLD), gate logic, transistor logic, discrete hardware circuits, processing circuits, or other suitable hardware, firmware and/or combinations of hardware and software for executing the various functions described herein. The processor (e.g., processor 112 and/or processor 122) may be a general purpose processor or a special purpose processor. For example, processor 112 and/or processor 122 may be a baseband processor or a central processor. The baseband processor may be used to process communication protocols and communication data. The central processor may be used to cause the base station 110 and/or the UE 120 to execute software programs and process data in the software programs.

Interfaces (e.g., interfaces 111 and/or 121) can include functionality for enabling communication with one or more computer devices (e.g., a UE, BS, and/or network node). In some embodiments, the interface may include wires for coupling a wired connection, or pins for coupling a wireless transceiver, or chips and/or pins for a wireless connection. In some embodiments, the interface may include a transmitter, a receiver, a transceiver, and/or an antenna. The interface may be configured to use any available protocol (e.g., 3GPP standards).

The procedure in this application is used in a broad sense to represent software. Non-limiting examples of software are program code, programs, subroutines, instructions, instruction sets, code segments, software modules, applications, software applications, and the like. The programs may be executable in a processor and/or a computer to cause base station 110 and/or UE 120 to perform various functions and/or processes described herein.

Memory (e.g., storage 113 and/or storage 123) may store data that is manipulated by processors 112, 122 when executing software. The memories 113, 123 may be implemented using any memory technology. For example, memory may be any available storage media that can be accessed by a processor and/or computer. Non-limiting examples of storage media include: RAM, ROM, EEPROM, CD-ROM, removable media, optical disk storage, magnetic disk storage media, magnetic storage devices, flash memory, registers, state memory, remote mounted memory, local or remote memory components, or any other medium capable of carrying or storing software, data, or information and accessible by a processor/computer.

The memory (e.g., memory 113 and/or memory 123) and the processor (e.g., processor 112 and/or processor 122) may be separately provided or integrated. The memory may be used in connection with the processor such that the processor can read information from, store information in, and/or write information to the memory. The memory 113 may be integrated in the processor 112. Memory 123 may be integrated in processor 122. The processor (e.g., processor 112 and/or processor 122) and the memory (e.g., memory 113 and/or memory 123) may be provided in an integrated circuit (e.g., the integrated circuit may be provided in a UE or a base station or other network node).

The foregoing briefly describes a network architecture of an embodiment of the present application, and in order to better understand the technical solutions of the embodiments of the present application, several matters related to the present application will be briefly described below.

1. Demodulation reference signal (dedicated demodulation reference signal, DMRS)

A demodulation reference signal (DMRS) is a reference signal for equivalent channel estimation at a receiving end. The DMRS may be used to estimate an equivalent channel matrix experienced by a data channel, such as a physical uplink shared channel (physical uplink shared channel, PUSCH) or a physical downlink shared channel (physical downlink shared channel, PDSCH), or a control channel, such as a physical uplink control channel (physical uplink control channel, PUCCH) or a physical downlink control channel (physical downlink control channel, PDCCH), for detection and demodulation of data. Taking PUSCH as an example, the DMRS generally performs the same precoding process as the transmitted data signal, that is, the same precoding matrix P is adopted to ensure that the DMRS and the data signal experience the same equivalent channel.

For example, assuming that the DMRS vector sent by the sending end is s, the sent data symbol vector is x, and the DMRS performs the same precoding operation with the data symbol, that is, multiplies the data symbol by the same precoding matrix P, the corresponding received signal vector of the receiving end may be represented as follows.

Data:

DMRS：

wherein, the formula (1-1) is an equivalent received signal vector (y) of the data symbol transmitted to the receiving end, and the formula (1-2) is an equivalent received signal vector (r) of the DMRS transmitted to the receiving end. Vector n represents noise.

From the above formula (1-1) and the above formula (1-2), it can be seen that for both the data signal and the DMRS, the equivalent channels experienced areThe receiving end may use a channel estimation algorithm (e.g., least square (least square,LS) channel estimation, or minimum mean square error (minimum mean square error, MMSE) channel estimation, etc.) to obtain an equivalent channel +.>(i.e., HP). Multiple-input multiple-output (multiple input multiple output, MIMO) equalization and subsequent demodulation of the data signal may be accomplished based on the equivalent channel.

DMRS for estimating equivalent channels(i.e., HP) having a dimension of N _R X R (i.e. N) _R Row R column). Wherein N is _R For the number of receive antennas, R is the number of transport streams (also called the number of transport layers, the number of spatial layers, or rank). Generally, one DMRS port (DMRS port) corresponds to one spatial layer. For MIMO transmission with a number of transmission layers R, the number of DMRS ports required is R. To ensure the quality of the channel estimation, typically the different DMRS ports are orthogonal ports. DMRS symbols corresponding to different DMRS ports are orthogonal in at least one of the frequency domain, time-frequency domain, or code domain.

In some scenarios of the present application, "number of transmission layers" and "rank" mean the same meaning and may be used interchangeably.

2. Transmitting precoding matrix indicator (transmitted precoding matrix indicator, TPMI)

In a multiple-input multiple-output (multiple input multiple output, MIMO) system, in order to effectively ensure the transmission performance of uplink data, precoding processing is generally performed on uplink multi-layer transmission signals. For example, assume that the data symbol vector sent by the terminal device is x= [ x ₁ ,x ₂ ,…,x _l ,...,x _L ] ^T Wherein x is _l Representing the transmitted data symbol corresponding to the first spatial layer. Assuming that the precoding matrix is W, the precoded transmit signal vector may be represented as:

wherein,and the value of j is 1,2,3, and N.

In practical applications, the precoding matrix (W) used by the terminal device in uplink transmission is usually indicated to the terminal device by the network device. Wherein, in view of the indication overhead and performance of the precoding matrix, for codebook-based systems, the precoding matrix W is typically selected from a preset set of precoding matrices (also referred to as codebook). Taking the NR protocol as an example, for a single antenna single layer transmission system, the precoding matrix w=1. For a multi-antenna system, the network device sends TPMI (transmit precoding matrix indicator) to the terminal device for indicating which precoding matrix in the codebook set needs to be used for the uplink precoding matrix. Taking the 4 antenna port (antenna port) as an example, the NR protocol defines different codebooks for rank=1 to 4, as shown in tables 1 to 4, respectively, below. It will be appreciated that the symbol "-" in tables 1 to 4 indicates nothing.

Table 1:4 antenna ports, single layer (i.e. rank=1) transmission corresponding precoding matrix sets

Table 2:4 antenna ports, 2 layers (i.e. rank=2) transmit corresponding precoding matrix sets

Table 3:4 antenna ports, 3 layers (i.e. rank=3) transmit corresponding precoding matrix sets

Table 4:4 antenna ports, 4 layers (i.e. rank=4) transmitting corresponding precoding matrix sets

Limited by the volume and cost of the terminal devices, the antenna architecture and capabilities of different terminal devices vary. The precoding matrices that can be used are different for the transmit antenna capabilities of different terminal equipments. In other words, the range of values of the TPMI index is different for different antenna capabilities. Illustratively, 1) when the antenna capability of the terminal device (or UE) is that all transmit antennas do not support Coherent transmission (Non-Coherent), the terminal device may use precoding matrices identified by TPMI index=0-3 in table 1, TPMI index=0-5 in table 2, TPMI index=0 in table 3, and TPMI index=0 in table 4. 2) When the antenna capability of the terminal device (or UE) supports Partial Coherent transmission for all the transmitting antennas, for example, only the antennas in the subset or the subset of antennas may support Coherent transmission, the precoding matrix identified by TPMI index=4-11 in table 1, TPMI index=6-13 in table 2, TPMI index=1-2 in table 3, and TPMI index=1-2 in table 4 is corresponding. 3) When the antenna capability of the terminal device (or UE) is that all the transmitting antennas support Coherent transmission (Full Coherent), the precoding matrices identified by TPMI index=12 to 27 in table 1, TPMI index=14 to 21 in table 2, TPMI index=3 to 6 in table 3, and TPMI index=3 to 4 in table 4 are corresponded. It can be understood that when the antenna capability of the terminal device (or UE) is that all transmitting antennas support Coherent transmission (Full Coherent), the terminal device may use any precoding matrix (including a precoding matrix for incoherent transmission, a precoding matrix for partial Coherent transmission, and a precoding matrix for Full Coherent transmission) in tables 1 to 4, not limited to the precoding matrices identified by TPMI index=12 to 27 in table 1, TPMI index=14 to 21 in table 2, TPMI index=3 to 6 in table 3, and TPMI index=3 to 4 in table 4, because the antenna capability of the terminal device is strong. When the antenna capability of the terminal device (or UE) is to support Partial Coherent transmission (Partial Coherent), the terminal device may use the precoding matrices of incoherent transmission in tables 1 to 4 and the precoding matrices of Partial Coherent transmission, corresponding to the precoding matrices identified by TPMI index=4 to 27 in table 1, TPMI index=6 to 21 in table 2, TPMI index=1 to 6 in table 3, and TPMI index=1 to 4 in table 4. When the antenna capability of the terminal device (or UE) is Non-Coherent transmission (Non-Coherent), the terminal device may use only precoding matrices of Non-Coherent transmission in tables 1 to 4, corresponding to precoding matrices identified by TPMI index=0 to 3 in table 1, TPMI index=0 to 5 in table 2, TPMI index=0 in table 3, and TPMI index=0 in table 4.

3. Codebook (codebook) based uplink transmission

For uplink transmission, when the terminal equipment is configured with a multi-antenna transmitting radio frequency channel, the terminal equipment can perform uplink MIMO transmission through multiple antennas. Or multiple terminal devices transmit simultaneously on the same time-frequency resource to form a virtual MIMO system, i.e. Uplink (UL) multi-user (MU) MIMO transmission (UL MU-MIMO). The current NR protocol supports two uplink MIMO transmission modes, codebook (codebook) based transmission and non-codebook (non-codebook) transmission.

For codebook-based uplink transmission, the precoding matrix for uplink transmission may be determined according to a fixed or preset codebook. Specifically, the uplink transmission flow based on the codebook includes: 1) The terminal device transmits a sounding reference signal (sounding reference signal, SRS) to the network device. 2) The network device performs uplink channel measurement according to the SRS sent by the terminal device, and determines information such as DMRS port index, transmission layer number (rank), precoding matrix, modulation and coding strategy (modulation and coding scheme, MCS) and the like of uplink transmission. 3) The network device notifies the terminal device of the resource scheduling information of the PUSCH, such as MCS, TPMI index, number of transmission layers (i.e., rank), DMRS port index, and the like. 4) The terminal equipment carries out coded modulation on uplink data based on MCS indicated by the network equipment, determines a precoding matrix based on the indicated TPMI index and the transmission layer number, respectively carries out precoding on the uplink data and the DMRS signals indicated by the DMRS port index, and further sends the uplink data and the DMRS.

That is, in the uplink transmission, the transmission behavior of the terminal device is scheduled by the network device. The network device may inform the terminal device of the number of transmission layers (also referred to as rank), TPMI index, and corresponding DMRS port index for transmitting uplink data through the indication information. The terminal device may transmit the uplink data and the DMRS by using the precoding matrix identified by the TPMI index and the DMRS indicated by the DMRS port index and the number of transmission layers (i.e., rank) on the corresponding time-frequency resource at the time of transmitting the uplink data. The meaning of the DMRS port (DMRS port) index and the number of transmission layers (i.e., rank) refer to the existing standard or protocol, and are not described in detail herein.

Taking the NR protocol as an example, the current Uplink (UL) maximally supports 4-layer transmission, the network device may indicate the number of transmission layers (i.e. rank) and the corresponding TPMI index, and the DMRS port index to the terminal device through downlink control information (downlink control information, DCI) signaling. Specifically, the DCI signaling includes precoding information and a layer number (precoding information and number of layers) field, which are used to indicate the number of transmission layers (i.e., rank) and the corresponding TPMI index. The protocol defines different numbers of transport layers (i.e., rank values) and selectable combinations of TPMI indices for different antenna capabilities and configuration parameters of the terminal device (or UE). For example, for a 4 antenna port, if the configuration parameter of the terminal device is that the transform precoder (transform precoder) is not on (cyclic prefix (CP) orthogonal frequency division multiplexing (orthogonal frequency-division multiplexing, OFDM) waveform), and the uplink full power transmission (ul-fullflowpower transmission) is not configured or is configured as full power mode2 (fullowmode 2) or full power (fullowpower), the optional combination of rank and TPMI index is shown in table 5 below.

It is understood that the TPMI index values of table 5 represent the corresponding precoding matrices in the foregoing tables 1 to 4.

Table 5:4 antenna ports, TPMI index and transport layer number (i.e., rank) optional combinations (transform precoder unopened, ul-fullpower transmission not configured, or configured as fullpower mode2 or fullpower)

The first, third, and fifth columns of table 5 each represent values of the precoding information and layer number (precoding information and number of layers) fields, which are index values, one index value representing a combination of rank and TPMI index. The second, fourth and sixth columns of table 5 above represent alternative combinations of rank and TPMI indices, respectively, for different antenna capabilities. The terminal device can learn the transmission layer number (rank) and the TPMI index of the uplink transmission according to the precoding information in the DCI signaling, the value of the layer number (precoding information and number of layers) field and its corresponding antenna capability (such as coherent, partially coherent or incoherent). For example, assuming that the value of the precoding information and the layer number field in the DCI signaling is 3 (i.e. the index value is 3), and the antenna capability of the terminal device is incoherent (non-Coherent), the combination of the transmission layer number and the TPMI index of the uplink transmission may be determined to be: rank=1, tpmi=3.

In addition, the DCI signaling further includes an antenna port (antenna port) field, which is used to indicate the DMRS port index. For different rank values, the protocol defines different DMRS port index tables. Taking the dual symbol Type 1DMRS as an example, when transform precoder is not turned on, the DMRS port index tables corresponding to layers 1 (i.e., rank=1) to 4 (i.e., rank=4) are shown in tables 6 to 9 below. The terminal device may select a corresponding DMRS port index table based on the precoding information, the layer number field, and the rank value obtained by the antenna capability of the terminal device, so as to determine the DMRS port index indicated by the antenna port field.

Table 6: DMRS port index, DMRS-type=1, maximum DMRS symbol number is 2, rank=1

Table 7: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=2

Table 8: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=3

Table 9: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=4

The first column (value) in tables 6 to 9 represents the value of the antenna port (antenna port) field, and the third column (DMRS port (s)) represents the DMRS port index value. The meaning of the parameters in the second and fourth columns of tables 6 to 9 may refer to existing standards or protocols, and will not be described in detail here.

As can be seen from the rank, TPMI index and the indication method of DMRS port index in the NR protocol (as shown in tables 5 to 9 above), only uplink transmission of 4 layers (i.e., rank=4) can be supported at maximum. But with further improvement of terminal equipment capability, terminal equipment with more than 4 transmitting antennas is increasing. And the maximum supportable transmission layer number (i.e., rank) of the terminal equipment with more than 4 antennas is also more than 4, for example, the terminal equipment with 8 antennas can support uplink transmission with 8 layers (i.e., rank=8). Therefore, the TPMI index and DMRS port index indication for more than 4 antenna ports are highly sought after.

4. Non-codebook (non-codebook) transmission

For non-codebook transmission, the main difference compared to codebook-based transmission is that: the precoding matrix transmitted by the non-codebook is not selected from the preset codebook any more, so that the indication cost of the precoding matrix can be saved, compared with a codebook transmission mode, the precoding matrix does not need to be selected from a limited preset precoding set, the limitation of the precoding matrix in the codebook on the amplitude and phase quantization precision is broken through, the precision of the precoding matrix can be effectively improved, and the transmission performance is further improved.

Referring to fig. 3, fig. 3 is a schematic diagram of an uplink transmission flow of a non-codebook according to an embodiment of the present application. As shown in fig. 3, the uplink transmission flow of the non-codebook includes: 1) And the terminal equipment performs channel measurement through the downlink reference signals to obtain candidate uplink precoding matrixes, and the SRS is precoded based on the determined uplink precoding matrixes and then sent to the network equipment. 2) The network equipment carries out channel estimation based on SRS sent by the terminal equipment, and carries out scheduling on the terminal equipment based on a channel measurement result, determines SRS resources of uplink transmission and MCS of the uplink transmission, and notifies the SRS resources and MCS to the terminal equipment. Wherein the uplink SRS resource is notified to the terminal equipment through SRS resource indication (SRS resource indicator, SRI). 3) The terminal equipment determines the transmission layer number (namely rank) according to the received SRI, carries out coded modulation on the data through the MCS information, and further sends the pre-coded uplink data.

5. Sounding reference signal resource indication (SRS resource indicator, SRI)

The sounding reference signal (sounding reference signal, SRS) is mainly used for the network device to determine the uplink channel quality for uplink frequency selective scheduling. The network device may configure the time-frequency resource location occupied by the SRS resource and the transmission manner adopted for transmitting the SRS on the SRS resource through a higher layer signaling such as radio resource control (radio resource control) signaling or medium access control (medium access control-control element, MAC-CE) signaling. The configuration information (for example, higher-layer parameter SRS-Resource) of each SRS Resource at least includes: index number of the SRS resource, time-frequency position information occupied by the SRS resource, SRS transmitting port number, and the like. The time domain types of SRS resource configurations are periodic, semi-static, and aperiodic.

For uplink transmission of a non-codebook, the network device may indicate, through RRC signaling, SRS resource configuration information and channel state information (channel state information, CSI) reference signal (CSI reference signal, CSI-RS) resource configuration information associated with the SRS, where the CSI-RS resource configuration information includes ports of the CSI-RS resource, occupied time-frequency resources, and the like. The network equipment sends the CSI-RS on the corresponding time-frequency resource, the terminal equipment receives the CSI-RS on the corresponding time-frequency resource and obtains a candidate precoding matrix based on channel reciprocity assumption and combining with a self algorithm, and then sends the SRS processed by the candidate precoding matrix on the corresponding SRS resource, and the network equipment receives and measures the weighted SRS on the corresponding SRS time-frequency resource to obtain uplink channel information. The network equipment determines the time-frequency resource and the transmission scheme used for scheduling the terminal equipment to send the PUSCH through the realization algorithm of the network equipment, and indicates the information to the terminal equipment through DCI signaling carried in the PDCCH used for uplink scheduling. The transmission scheme at least comprises beam information used by the terminal equipment for sending the PUSCH, SRS Resource Indication (SRI), modulation and Coding Strategy (MCS) and antenna port indication information. After receiving the DCI for scheduling PUSCH transmission, the terminal device performs PUSCH transmission according to the time-frequency resource and the transmission scheme indicated in the DCI. The SRS sent on each SRS resource corresponds to a precoding matrix, typically, one SRS resource is a virtual port, and the number of SRS resources configured by high-layer signaling characterizes the maximum number of layers that can be supported by PUSCH transmission. The terminal equipment needs to transmit the DMRS associated with the PUSCH while transmitting the PUSCH, and the network equipment carries out channel estimation and demodulates the corresponding PUSCH through the DMRS. The DMRS ports are in one-to-one correspondence with SRS resources indicated by the SRI. The SRI is used for indicating phase weighting among transmitting antennas used by the terminal equipment for transmitting the PUSCH to perform the same phase weighting operation among transmitting antennas for transmitting the SRS indicated by the SRI, and simultaneously indicating the transmission layer number of the PUSCH.

Table 10 below shows the mapping relationship between the SRI field value and the SRS resource index in the DCI signaling. In table 10, the first column, the third column and the fifth column each represent the value of the SRI field, and the second column, the fourth column and the sixth column each represent the SRS resource index indicated by the corresponding value. Wherein N is _SRS The number of bits of the SRI field is determined by the number of SRS resources configured by the network device through higher layer signaling. When the number of SRS resources is greater than 1, the number of bits of the SRI field is greater than 0. By N _SRS For example, =4, each value of the SRI field of 4 bits is used to indicate one or more SRS resources, and the number of SRS resources characterizes the number of transmission layers. For example, the precoding matrices correspondingly carried by the 4 single-port SRS resources (index values from 0 to 3) are respectively: [1 0 0 0]，[0 1 0 0]，[0 0 1 0]，[0 0 0 1]. When the SRI field indicates that the index value is 7 and SRS resource numbers 1 and 2 are indicated, 2 layers are adopted for PUSCH transmission, and the precoding matrix of each layer is [0 10 0 ]]And [0 0 10 ]]。

Table 10: SRI field example 1

As can be seen from the above indication of SRS resources (as shown in table 10 above), the uplink is currently only able to support non-codebook transmission of maximum 4 layers (i.e. rank=4). But with further improvement of terminal equipment capability, terminal equipment with more than 4 transmitting antennas is increasing. And the maximum supportable transmission layer number (i.e., rank) of the terminal equipment with more than 4 antennas is also more than 4, for example, the terminal equipment with 8 antennas can support uplink transmission with 8 layers (i.e., rank=8). Therefore, the SRS resource indication for non-codebook transmission at more than 4 antenna ports is also needed to be explored.

For uplink transmission based on a codebook (codebook), the embodiments of the present application provide an information indication method, an apparatus, and a readable storage medium, which can support a combined indication of a transmission layer number and a TPMI index greater than 4 antenna ports and a DMRS port index indication, and can reduce an indication overhead without affecting compatibility. Alternatively, the embodiment of the present application may furthest multiplex the transmission layer number (1 layer to 4 layers) of the 4 antenna ports and the optional combination table of the TPMI indexes (table 5 above) and the DMRS port index indication table (table 6 to table 9 above), and reduce the combined indication overhead of the transmission layer number and the TPMI indexes of the transmission layer number greater than 4 antenna ports and the indication overhead of the DMRS port indexes of the DMRS port index greater than 4 antenna ports without affecting the combined indication of the transmission layer number and the TPMI indexes of the 4 antenna ports and the DMRS port index indication, thereby reducing redundancy.

For non-codebook (non-codebook) transmission, the embodiments of the present application provide an information indication method, an apparatus, and a readable storage medium, which can support SRS resource index indication of greater than 4 SRS resources, so as to support non-codebook transmission of greater than 4 layers, and further improve transmission performance.

The technical solutions provided in the present application will be described in detail below with reference to more drawings.

For the purpose of clarity in describing the technical solutions of the present application, the present application is illustrated by a number of examples, see in particular below. Throughout this application, unless specifically stated otherwise, identical or similar parts between various embodiments or implementations may be referred to each other. In the various embodiments and the various implementation/implementation methods in the various embodiments in this application, if no special description and logic conflict exist, terms and/or descriptions between different embodiments and between the various implementation/implementation methods in the various embodiments may be consistent and may be mutually referred to, technical features in the different embodiments and the various implementation/implementation methods in the various embodiments may be combined to form new embodiments, implementations, implementation methods, or implementation methods according to their inherent logic relationships. The embodiments of the present application described below do not limit the scope of the present application.

Example 1

In the first embodiment of the present application, based on the correspondence between low rank (e.g., rank=1-4) and high rank (e.g., rank=5-8), the combinations of the rank=1-8 and the TPMI indexes corresponding to the respective rank=1-8 are encoded in one table, and according to the correspondence, the DMRS port indexes of the two ranks having the correspondence are also encoded in one table, and the rank, the TPMI index and the DMRS port index to be adopted are determined by combining the two tables.

Referring to fig. 4, fig. 4 is a first flowchart of an information indication method according to an embodiment of the present application. The terminal device involved in the method may have more than 4 transmit antennas, such as the terminal device in the present application has 6 transmit antennas or 8 transmit antennas. As shown in fig. 4, the information indication method includes, but is not limited to, the following steps:

s101, a network device sends first indication information and second indication information, wherein the first indication information is used for indicating a combination of a transmission layer number and a TPMI index, the transmission layer number corresponds to the TPMI index, the first indication information has at least a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, and the plurality of combinations comprise a first combination and a second combination; the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, the DMRS port index is associated with the first combination when the second indication information is the value in the first set, and the DMRS port index is associated with the second combination when the second indication information is the value in the second set.

Correspondingly, the terminal equipment receives the first indication information and the second indication information.

S102, the terminal equipment determines a combination from the plurality of combinations according to the value of the second indication information.

Alternatively, the first indication information and the second indication information may be sent in one signaling, or may be sent in a different signaling, which is not limited in the embodiment of the present application. For example, the first indication information and the second indication information may be carried in downlink control information (downlink control information, DCI) signaling. For example, the first indication information may be a precoding information and layer number (precoding information and number of layers) field in DCI signaling, which is used to indicate a combination of a transport layer number (i.e., rank) and a TPMI index corresponding to the transport layer number; the second indication information may be an antenna port (antenna port) field in DCI signaling for indicating the DMRS port index.

Optionally, the first indication information (such as precoding information and layer number field) has at least one value (which is denoted as a first value for convenience of description), and the value (i.e., the first value) indicates a plurality of combinations of transmission layer numbers and TPMI indexes. The number of transmission layers corresponds to the TPMI index, for example, the number of transmission layers is the same as the number of precoding matrix identified by the TPMI index. One of the transport layers and the TPMI index corresponding to the transport layer are combined. Illustratively, the plurality of combinations includes at least a first combination and a second combination. The number of transmission layers in the first combination is one of 1,2,3,4, and the number of transmission layers in the second combination is one of 5,6,7, 8. In other words, there is a correspondence between the number of transmission layers in the first combination and the number of transmission layers in the second combination. For example, taking an 8 antenna port as an example, when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5; when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 6; when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 7; when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 8. Alternatively, when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8; when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7; when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6; when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5. Of course, there may be other correspondence between the number of transmission layers in the first combination and the number of transmission layers in the second combination, which is not limited to the above example.

Optionally, the value of the second indication information (such as an antenna port field) belongs to one of a plurality of sets, each set including at least one value, and the plurality of sets includes at least a first set and a second set. When the value of the second indication information is the value in the first set, the DMRS port index indicated by the second indication information is associated with the first combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the first combination. When the value of the second indication information is the value in the second set, the DMRS port indexes indicated by the second indication information are associated with the second combination, for example, the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers (i.e., rank) in the second combination. In other words, when the antenna port field takes values in different sets, the DMRS port index indicated by the antenna port field corresponds to different transmission layers.

It can be appreciated that in order to support uplink transmission of more than 4 layers, the rank, TPMI index, and indication of DMRS port index need to be designed. The following illustrates how the first indication information (such as the precoding information and the layer number field) indicates the combination of the transmission layer number (i.e., rank) and the TPMI index, and how the second indication information (such as the antenna port field) indicates the DMRS port index in the embodiments of the present application.

In one example, taking an 8-antenna port (maximum 8-layer uplink transmission) as an example, rank=5 to 8 and rank=1 to 4 are in a one-to-one correspondence. With rank=1 corresponding to rank=5, rank=2 corresponding to rank=6, rank=3 corresponding to rank=7, and rank=4 corresponding to rank=8 as an example.

(1) According to the correspondence, the embodiments of the present application encode the combinations of the rank=1 to 4 and the TPMI indexes corresponding thereto, respectively, and the combinations of the rank=5 to 8 and the TPMI indexes corresponding thereto, respectively, in one table. As shown in table 11 below, table 11 shows optional combinations of TPMI indexes and transmission layer numbers of 8 antenna ports, that is, table 11 shows optional combinations of TPMI indexes corresponding to layers 1 to 8, respectively. The first, third and fifth columns in table 11 each represent the values of the first indication information (such as the precoding information and the layer number field). The second, fourth and sixth columns of table 11 represent alternative combinations of number of transmission layers and TPMI index for different antenna capabilities, respectively. As can be seen from table 11, the first indication information (e.g., precoding information and layer number field) has at least one value indicating a plurality of combinations of transmission layer number and TPMI index. For example, the antenna capability of the terminal device is completely coherent (full coherent), and if the value of the precoding information and the layer number field is 1, the first value=1 indicates that the 2 combinations of the transmission layer number and the TPMI index are respectively: first combination: rank=1 and tpmi=1; second combination: rank=5 and tpmi=1. For another example, the first value may be 8, and the 2 combinations indicating the number of transmission layers and TPMI index are respectively: first combination: rank=2 and tpmi=0; second combination: rank=6 and tpmi=0.

It is understood that one TPMI index in table 11 identifies one precoding matrix, and the present application does not limit the precoding matrix identified by the TPMI index in table 11.

Table 11:8 antenna ports, TPMI index and transport layer number (i.e., rank) optional combinations (transform precoder unopened, ul-fullpower transmission not configured, or configured as fullpower mode2 or fullpower)

/>

It can be appreciated that for the precoding codebook, as in the foregoing table 1 to the foregoing table 4, it can be seen that in the case where the number of antenna ports is unchanged, the number of selectable precoding matrices in the codebook set decreases as the number of transmission layers (i.e., rank) increases. Then, the range of TPMI indexes corresponding to rank=5 to 8 under the 8 antenna ports is not greater than the range of TPMI indexes corresponding to rank=1 to 4 under the 8 antenna ports. Therefore, a partial value of the first indication information (e.g., precoding information and layer number field) in table 11 indicates 2 combinations of the transmission layer number (i.e., rank) and the TPMI index, and the other partial value indicates 1 combination of the transmission layer number (i.e., rank) and the TPMI index.

In the embodiment of the present application, a correspondence between rank=1 to 4 and rank=5 to 8 is established, and based on the correspondence, at least one value is provided for the first indication information (such as precoding information and layer number field), where the value indicates multiple combinations of transmission layer numbers and TPMI indexes, that is, 2 ranks and corresponding indication codes of the TPMI indexes are encoded in the same row of the table, and correspond to the same indication index value, so that compared with the case where the combined indication of the transmission layer numbers and the TPMI indexes of the 8 antenna ports is extended according to the combined indication mode of the transmission layer numbers and the TPMI indexes of the 4 antenna ports in the NR protocol, the indication overhead is reduced. It can be understood that the combined indication of the number of transmission layers and the TPMI index of the 4 antenna ports in the NR protocol is a combination of a value indicating the number of transmission layers and the TPMI index. Because the number of transmission layers and TPMI index of the 8-antenna port are alternatively combined more than the number of transmission layers and TPMI index of the 4-antenna port, the number of indication bits required for the 8-antenna port is greater than the number of indication bits required for the 4-antenna port (as shown in the aforementioned table 5, the 4-antenna port requires 6 bits (2 ⁶ Indicated overhead of =64)). Whereas if the 8-antenna port still adopts the combined indication mode of the transmission layer number and the TPMI index of the 4-antenna port (i.e. one value of the precoding information and the layer number field indicates one combination of the transmission layer number and the TPMI index), more indication bits are needed under the 8-antenna port, at least 9 bits (2 ⁹ =512), whereas table 11 of the present embodiment only requires 8 bits (2 ⁸ =256). Thus, embodiments of the present application reduce the indication overhead by 1 bit.

(2) According to the above correspondence (rank=1 corresponds to rank=5, rank=2 corresponds to rank=6, rank=3 corresponds to rank=7, and rank=4 corresponds to rank=8), the DMRS port indexes corresponding to rank=1 and rank=5, respectively, are encoded in one table in the embodiment of the present application, as shown in the following tables 12a and 12 b; the DMRS port indexes corresponding to rank=2 and rank=6, respectively, are encoded in one table, as shown in the following tables 13a and 13 b; the DMRS port indexes corresponding to rank=3 and rank=7, respectively, are encoded in one table, as shown in the following tables 14a and 14 b; DMRS port indexes corresponding to rank=4 and rank=8, respectively, are encoded in one table, as shown in tables 15a and 15b below. Table 12a, table 13a, table 14a and table 15a are exemplified by a dual symbol Type 1 DMRS, while table 12b, table 13b, table 14b and table 15b are exemplified by a dual symbol Type 2 DMRS. For convenience of description, the following is exemplified by a dual symbol Type 1 DMRS.

Wherein, the first column in tables 12a to 15b represents the value of the second indication information (such as the antenna port field), and the third column represents the DMRS port index indicated by the corresponding value. The meaning of the parameters in the second and fourth columns of tables 12a through 15b may refer to existing standards or protocols and are not described in detail herein. For example, the value of the second indication information may belong to one of a plurality of sets including a first set and a second set, which may be distinguished by the DMRS port index number. Specifically, the DMRS port index number indicated by each value in the same set is the same, and the DMRS port index numbers indicated by the values in different sets are different, that is, the DMRS port index number indicated by any value in the first set is different from the DMRS port index number indicated by any value in the second set. For example, for table 12a, the first set is 0 to 13 (including 0 and 13), the second set is 14; for table 12b, the first set is 0 to 27 (including 0 and 27) and the second set includes 28 and 29. For table 13a, the first set is 0 to 9 (including 0 and 9) and the second set is 10; for table 13b, the first set is 0 to 18 (containing 0 and 18) and the second set includes 19 and 20. For table 14a, the first set is 0 to 2 (including 0 and 2) and the second set is 3; for table 14b, the first set is 0 to 5 (including 0 and 5) and the second set is 6. For table 15a, the first set is 0 to 3 (including 0 and 3) and the second set is 4; for table 15b, the first set is 0 to 4 (including 0 and 4) and the second set is 5.

Table 12a: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=1 and 5

Table 12b: DMRS port index, DMRS-type=2, maximum DMRS symbol number of 2, rank=1 and 5

/>

It can be appreciated that table 12a indicates the DMRS port index corresponding to rank=5 using the reserved value (14 or 15) of the DMRS port index table corresponding to rank=1 (table 6 described above). It is further understood that table 12a is merely an example, and that which reserved value (14 or 15) is specifically used to indicate the DMRS port index corresponding to rank=5, which embodiments of the present application are not limited. In addition, the DMRS port index corresponding to rank=5 may be any 5 of 0,1,2,3,4,5,6, and 7, and in the embodiment of the present application, the DMRS port index corresponding to rank=5 is not limited to the DMRS port index shown in table 12a (i.e. 0,1,2,3, and 4). Table 12b is similar to table 12a and is not described in detail here.

Table 13a: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=2 and 6

/>

Table 13b: DMRS port index, DMRS-type=2, maximum DMRS symbol number of 2, rank=2 and 6

It can be understood that table 13a indicates the DMRS port index corresponding to rank=6 using the reserved values (10 to 15) of the DMRS port index table corresponding to rank=2 (the foregoing table 7). It is further understood that table 13a is merely an example, and that which reservation value (any one of 10 to 15) is specifically used to indicate the DMRS port index corresponding to rank=6, which is not limited in the embodiment of the present application. In addition, the DMRS port index corresponding to rank=6 may be any 6 of 0,1,2,3,4,5,6, and 7, and in the embodiment of the present application, the DMRS port index corresponding to rank=6 is not limited to the DMRS port index shown in table 13a (i.e. 0,1,2,3,4,6). Table 13b is similar to Table 13a and is not described in detail herein.

Table 14a: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=3 and 7

Table 14b: DMRS port index, DMRS-type=2, maximum DMRS symbol number of 2, rank=3 and 7

/>

It can be appreciated that table 14a indicates the DMRS port index corresponding to rank=7 using the reserved values (3 to 15) of the DMRS port index table corresponding to rank=3 (table 8 described above). It is further understood that table 14a is merely an example, and that which reservation value (any one of 3 to 15) is specifically used to indicate the DMRS port index corresponding to rank=7 is not limited in the embodiment of the present application. In addition, the DMRS port index corresponding to rank=7 may be any 7 of 0,1,2,3,4,5,6, and 7, and in the embodiment of the present application, the DMRS port index corresponding to rank=7 is not limited to the DMRS port index shown in table 14a (i.e. 0,1,2,3,4,5, and 6). Table 14b is similar to table 14a and is not described in detail herein.

Table 15a: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=4 and 8

Table 15b: DMRS port index, DMRS-type=2, maximum DMRS symbol number of 2, rank=4 and 8

It can be appreciated that table 15a indicates the DMRS port index corresponding to rank=8 using the reserved values (4 to 15) of the DMRS port index table corresponding to rank=4 (table 9 described above). It is further understood that table 15a is merely an example, and that which reservation value (any one of 4 to 15) is specifically used to indicate the DMRS port index corresponding to rank=8 is not limited in the embodiment of the present application. Table 15b is similar to Table 15a and is not described in detail herein.

It is understood that the above tables 12a to 15b are exemplified by the dual symbol Type 1DMRS and the dual symbol Type 2DMRS, and the above DMRS port index table is only an example. The same applies to other DMRS types, such as single symbol Type 1DMRS and Type 2DMRS.

It can be understood that, for the DMRS port index, in order to ensure that DCI signaling lengths corresponding to different transmission layers (i.e., rank) are the same, a large number of reserved (reserved) options appear in the DMRS port index table. As shown in the foregoing table 6 to the foregoing table 9, the DMRS port index indication overhead corresponding to rank=1 to 4 is 4 bits, wherein 2 reserved options exist in the DMRS port index table corresponding to rank=1 (e.g., the foregoing table 6), 6 reserved options exist in the DMRS port index table corresponding to rank=2 (e.g., the foregoing table 7), 13 reserved options exist in the DMRS port index table corresponding to rank=3 (e.g., the foregoing table 8), and 12 reserved options exist in the DMRS port index table corresponding to rank=4 (e.g., the foregoing table 9). It follows that as the number of transmission layers (i.e., rank) increases, the number of alternative combinations of DMRS port indexes decreases. That is, the number of selectable combinations of DMRS port indexes corresponding to rank=5 to 8 is smaller than the number of selectable combinations of DMRS port indexes corresponding to rank=1 to 4.

Based on this, in the embodiment of the present application, the DMRS port indexes corresponding to the two ranks having the correspondence are encoded in one table, and the reserved values (or redundancy bits) in the DMRS port index tables corresponding to the ranks=1 to 4 in the existing NR protocol are used to indicate the DMRS port indexes corresponding to the ranks=5 to 8, so that the bit overhead indicated by the DMRS port indexes is not increased; and 4 DMRS port index tables are not required to be additionally added, so that redundant indication bits can be reduced.

It can be appreciated that the above correspondence (rank=1 corresponds to rank=5, rank=2 corresponds to rank=6, rank=3 corresponds to rank=7, and rank=4 corresponds to rank=8) has a fixed offset (offset), and that the alternative combination indication of the rank and TPMI indexes and the DMRS port index indication based on the correspondence are simpler and more straightforward.

It will be appreciated that, although the above examples (tables 11 to 15 b) take 8 antenna ports as an example, up-transmission of 8 layers is supported maximally, the present application may also be applicable to up-transmission of other transmission layers greater than 4 layers, such as up-transmission of 6 layers maximally. The implementation manners of the first indication information and the second indication information (i.e., the combined indication manner of the rank and TPMI indexes, and the indication manner of the DMRS port index) under the 6 antenna ports may refer to the implementation manner when the 8 antenna ports are implemented, which is not described in detail herein. For 6 antenna ports, a one-to-one correspondence relationship can be established between rank=5-6 and rank=1-2, rank=1 corresponds to rank=5, and rank=2 corresponds to rank=6; how to indicate the combination of the transmission layer number (i.e., rank) and the TPMI index under the 6 antenna ports, and how to indicate the DMRS port index, reference may be made to the indication manner under the 8 antenna ports, which is not described in detail herein. It will also be appreciated that the following description will be given by taking an 8-antenna port as an example for convenience of description.

Optionally, at the transmitting end, the network device may combine the table 11 and the tables 12a to 15b to jointly indicate the number of transmission layers (i.e. rank), TPMI index and DMRS port index configured for the terminal device. For example, based on table 11 above, if the network device wants to indicate this combination of rank=5, tpmi=2, the network device needs to set the value of the first indication information to 2, and needs to set the value of the second indication information to the value in the second set (such as 14 in table 12 a).

Correspondingly, at the receiving end, the terminal device may determine the transmission layer number (i.e. rank), the TPMI index and the DMRS port index indicated by the network device by combining the received first indication information (e.g. the precoding information and the layer number field) and the received second indication information (e.g. the antenna port field) and its own antenna capability. In a possible implementation manner, after receiving the first indication information (such as precoding information and layer number field) and the second indication information (such as antenna port field), the terminal device determines a DMRS port index table according to the number of transmission layers in the plurality of combinations, and further determines a value included in the first set and a value included in the second set; a combination may be determined from the above-mentioned combinations according to which set the value of the second indication information belongs to and the antenna capability of the terminal device itself. For example, if the value of the second indication information belongs to the first set, the terminal device determines a first combination, where the number of transmission layers and the TPMI index in the first combination are the number of transmission layers and the TPMI of uplink transmission configured by the network device to the terminal device. If the value of the second indication information belongs to the second set, the terminal equipment determines a second combination, wherein the transmission layer number and the TPMI index in the second combination are the uplink transmission layer number and the TPMI configured by the network equipment for the terminal equipment. For example, if the value of the first indication information is 0 and the antenna capability of the terminal device is Partial coherence, the indicated plurality of combinations are respectively the first combination: rank=1, tpmi=0, and the second combination: rank=5, tpmi=0. The terminal device may determine that the number of transmission layers in the combinations is 1 and 5, and may determine that the DMRS port index table is table 12a (for example, a dual symbol Type 1 DMRS). As can be seen from table 12a, the first set is 0-13 and the second set is 14; if the value of the second indication information is one of 0 to 13, e.g. 5, belonging to the first set, the terminal device may determine that the network device indicates a first combination: rank=1, tpmi=0. If the value of the second indication information is 14 and belongs to the second set, the terminal device may determine that the network device indicates the second combination: rank=5, tpmi=0.

In another possible implementation manner, after the terminal device receives the first indication information (such as the precoding information and the layer number field) and the second indication information (such as the antenna port field), it may determine, according to the number of transmission layers in the plurality of combinations and the value of the second indication information, which DMRS port indexes indicated by the second indication information have, and then may determine, according to the number of DMRS port indexes indicated by the second indication information and its own antenna capability, a combination from the plurality of combinations. For example, if the number of DMRS port indexes indicated by the second indication information is the same as the number of transmission layers in the first combination, the terminal device determines the first combination, where the number of transmission layers and the TPMI index in the first combination are the number of uplink transmission layers and the TPMI configured by the network device for the terminal device. If the number of the DMRS port indexes indicated by the second indication information is the same as the number of the transmission layers in the second combination, the terminal device determines the second combination, and the number of the transmission layers and the TPMI index in the second combination are the number of the transmission layers and the TPMI of the uplink transmission configured by the network device for the terminal device.

For example, assuming that the value of the first indication information is 3, if the antenna capability of the terminal device is Partial coherence, the 2 combinations of the indicated rank and TPMI are respectively: rank=1 and tpmi=3 (i.e., first combination); rank=5 and tpmi=3 (i.e., second combination). The terminal device may determine that the rank indicated by the network device is 1 or the rank is 5, and take the dual symbol Type 1DMRS as an example, the corresponding DMRS port index table is table 12a. If the value of the second indication information is one of 0 to 13, for example, 0, it indicates that the network device indicates rank=1, the corresponding DMRS port index is 0, and tpmi=3 may be determined accordingly. If the value of the second indication information is 14, it indicates that the network device indicates rank=5, the corresponding DMRS port index is 0 to 4, and tpmi=3 can be determined accordingly.

The terminal device in the embodiment of the present application determines one or more rank values and TPMI indexes corresponding to the one or more rank values respectively through the value of the first indication information, and then determines a specific rank value and DMRS port index according to the value of the second indication information, and further determines the TPMI index corresponding to the rank value. The method not only can support the combined indication of the transmission layer number (maximum 8 layers) of the 8-antenna port and the TPMI index and the indication of the DMRS port index of the 8-antenna port, reduce the indication overhead, but also can support the uplink transmission of the maximum 8 layers, and further can improve the transmission performance.

In another example, rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5.

(1) According to the correspondence, the embodiments of the present application encode the combinations of the rank=1 to 4 and the TPMI indexes corresponding thereto, respectively, and the combinations of the rank=5 to 8 and the TPMI indexes corresponding thereto, respectively, in one table. As shown in table 16 below, table 16 shows optional combinations of TPMI indexes and transmission layer numbers of 8 antenna ports, that is, table 16 shows optional combinations of TPMI indexes corresponding to layers 1 to 8, respectively. The first, third and fifth columns in table 16 each represent the values of the first indication information (such as the precoding information and the layer number field). The second, fourth and sixth columns of table 16 represent alternative combinations of number of transmission layers and TPMI index for different antenna capabilities, respectively. As can be seen from table 16, the first indication information (e.g., precoding information and layer number field) has at least one value indicating a plurality of combinations of transmission layer number and TPMI index. For example, if the antenna capability of the terminal device is completely coherent (full coherent), and the values of the precoding information and the layer number field are 8, the 2 combinations indicating the transmission layer number and the TPMI index are respectively: rank=2 and tpmi=0; rank=7 and tpmi=0.

It is to be appreciated that one TPMI index in table 16 identifies one precoding matrix, and the present application does not limit the precoding matrix identified by the TPMI index in table 16.

Table 16:8 antenna ports, TPMI index and transport layer number (i.e., rank) optional combinations (transform precoder unopened, ul-fullpower transmission not configured, or configured as fullpower mode2 or fullpower)

/>

It can be appreciated that as the number of transmission layers (i.e., rank) increases, the number of precoding matrices in the codebook set that are selectable decreases. Then, the range of TPMI indexes corresponding to rank=5 to 8 under the 8 antenna ports is not greater than the range of TPMI indexes corresponding to rank=1 to 4 under the 8 antenna ports.

In the embodiment of the present application, a correspondence between rank=1 to 4 and rank=5 to 8 is established, and based on the correspondence, at least one value is provided for the first indication information (such as precoding information and layer number field), where the value indicates multiple combinations of transmission layer numbers and TPMI indexes, that is, 2 ranks and corresponding indication codes of the TPMI indexes are encoded in the same row of the table, and correspond to the same indication index value, so that compared with the case where the combined indication of the transmission layer numbers and the TPMI indexes of the 8 antenna ports is extended according to the combined indication mode of the transmission layer numbers and the TPMI indexes of the 4 antenna ports in the NR protocol, the indication overhead is reduced.

(2) Taking the dual symbol Type 1DMRS as an example, according to the above-mentioned correspondence (rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5), the DMRS port indexes respectively corresponding to rank=1 and rank=8 are encoded in one table in the embodiment of the present application, as shown in the following table 17; the DMRS port indexes corresponding to rank=2 and rank=7, respectively, are encoded in a table, as shown in table 18 below; the DMRS port indexes corresponding to rank=3 and rank=6, respectively, are encoded in a table, as shown in table 19 below; DMRS port indexes corresponding to rank=4 and rank=5, respectively, are encoded in a table, as shown in table 20 below.

Wherein, the first column in tables 17 to 20 represents the value of the second indication information (e.g., antenna port field), and the third column represents the DMRS port index indicated by the corresponding value. The meaning of the parameters in the second and fourth columns of tables 17 to 20 may refer to existing standards or protocols and will not be described in detail here. For example, the value of the second indication information may belong to one of a plurality of sets including a first set and a second set, which may be distinguished by the DMRS port index number. Specifically, the DMRS port index number indicated by each value in the same set is the same, and the DMRS port index numbers indicated by the values in different sets are different, that is, the DMRS port index number indicated by any value in the first set is different from the DMRS port index number indicated by any value in the second set. The first set and the second set are not listed here.

Table 17: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=1 and 8

It can be appreciated that table 17 indicates DMRS port indexes corresponding to rank=8 using reserved values (14 and 15) of the DMRS port index table corresponding to rank=1 (the foregoing table 6). It can be further understood that, in order for the DMRS to occupy one code division multiplexing (code division multiplexing, CDM) group, the DMRS port index corresponding to rank=8 may be, in addition to the DMRS port index indicated by value=14 in table 17 (i.e. 0,1,4,5,8,9,12,13): 2,3,6,7,10,11,14,15.

Table 18: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=2 and 7

/>

It can be appreciated that table 18 indicates DMRS port indexes corresponding to rank=7 using reserved values (10 to 15) of the DMRS port index table corresponding to rank=2 (the foregoing table 7). It is further understood that table 17 is merely an example, and specific reserved values (10 to 15) are used to indicate DMRS port indexes corresponding to rank=7, which is not limited in the embodiment of the present application. In addition, the DMRS port index corresponding to rank=7 may be any 7 of 0,1,2,3,4,5,6,7, and the embodiment of the present application is not limited to the DMRS port index indicated by value=10 and 12 in the above table 18 (i.e. 0,1,2,3,4,5, 6).

It can be appreciated that, in order for the DMRS to occupy one Code Division Multiplexing (CDM) group, the DMRS port index corresponding to rank=7 may be any 7 in 0,1,4,5,8,9,12,13 or any 7 in 2,3,6,7,10,11,14,15, and the embodiment of the present application is not limited to the DMRS port index indicated by value=14 in table 18 (i.e. 0,1,4,5,8,9,12).

Table 19: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=3 and 6

It can be appreciated that table 19 indicates DMRS port indexes corresponding to rank=6 using reserved values (3 to 15) of the DMRS port index table corresponding to rank=3 (the foregoing table 8). It is further understood that table 19 is merely an example, and specific reserved values (3 to 15) are used to indicate DMRS port indexes corresponding to rank=6, which is not limited in the embodiment of the present application. In addition, the DMRS port index corresponding to rank=6 may be any 6 of 0,1,2,3,4,5,6,7, and the embodiment of the present application is not limited to the DMRS port index indicated by value=3 and 5 in table 19 (i.e. 0,1,2,3,4,6).

It can be appreciated that, in order for the DMRS to occupy one Code Division Multiplexing (CDM) group, the DMRS port index corresponding to rank=6 may be any 6 in 0,1,4,5,8,9,12,13 or any 6 in 2,3,6,7,10,11,14,15, and the embodiment of the present application is not limited to the DMRS port index indicated by value=4 in table 19 (i.e. 0,1,4,5,8,9).

Table 20: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=4 and 5

It can be appreciated that table 20 indicates the DMRS port index corresponding to rank=5 using the reserved values (4 to 15) of the DMRS port index table corresponding to rank=4 (table 9 described above). It is further understood that table 20 is merely an example, and specific use of which reservation values (4 to 15) indicate DMRS port indexes corresponding to rank=5, and the embodiments of the present application are not limited. In addition, the DMRS port index corresponding to rank=5 may be any 5 of 0,1,2,3,4,5,6,7 or any 5 of 8-15, and the embodiment of the present application is not limited to the DMRS port indexes indicated by value=4, 5,7, and 9 in the above table 20 (i.e. 0-4 and 8-12 and 3,4,5,6, 7).

It can be appreciated that, in order for the DMRS to occupy one Code Division Multiplexing (CDM) group, the DMRS port index corresponding to rank=5 may be any 5 of 0,1,4,5,8,9,12,13 or any 5 of 2,3,6,7,10,11,14,15, and the embodiment of the present application is not limited to the DMRS port indexes indicated by value=6 and 8 in table 20 (i.e. 0,1,4,5,8 and 5,8,9,12,13).

It can be appreciated that as the number of transmission layers (i.e., rank) increases, fewer and fewer alternative combinations of DMRS port indexes are available. Then, the number of optional combinations of DMRS port indexes corresponding to rank=5 to 8 is not greater than the number of optional combinations of DMRS port indexes corresponding to rank=1 to 4.

Based on this, in the embodiment of the present application, the DMRS port indexes of the two ranks having the correspondence relationship are encoded in one table, and the reserved value (or redundancy bit) in the DMRS port index table corresponding to rank=1 to 4 in the existing NR protocol is used to indicate the DMRS port indexes corresponding to rank=5 to 8; 4 DMRS port index tables are not required to be additionally added, extra indication information overhead is not introduced, and redundant indication bits can be reduced.

In addition, since the number of optional codebooks is gradually reduced as the number of transmission layers (i.e., rank) increases, that is, from rank=1 to rank=8, and the number of DMRS port combinations is also gradually reduced, the above-described correspondence (rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, rank=4 corresponds to rank=5) is adopted, and the transmission layer (1 layer) with the largest number of DMRS port index combinations and the transmission layer (8 layer) with the smallest number of DMRS port index combinations are encoded in one table, so that the existing redundant indicator bits can be maximally utilized, and the overhead can be saved. For example, for the case of DMRS port index extension, the DMRS port index corresponding to rank=5 needs 6 values to indicate, and if the DMRS port index corresponding to rank=1 and rank=5 is placed in one DMRS port index table, since there are only 2 reserved options in the DMRS port index table corresponding to rank=1 (as in table 6 above), 1 bit needs to be added to indicate.

It will be appreciated that, although the above examples (tables 11 to 15 b) take 8 antenna ports as an example, up-transmission of 8 layers is supported maximally, the present application may also be applicable to up-transmission of other transmission layers greater than 4 layers, such as up-transmission of 6 layers maximally. The implementation manners of the first indication information and the second indication information (i.e., the combined indication manner of the rank and TPMI indexes, and the indication manner of the DMRS port index) under the 6 antenna ports may refer to the implementation manner when the 8 antenna ports are implemented, which is not described in detail herein.

Optionally, at the transmitting end, the network device may combine the table 16 and the tables 17 to 20 to jointly indicate the number of transmission layers (i.e. rank), TPMI index and DMRS port index configured for the terminal device; reference is specifically made to the foregoing description, and is not repeated here. Correspondingly, at the receiving end, the terminal device may combine the received first indication information (such as precoding information and layer number field) and the received second indication information (such as antenna port field) and its own antenna capability, and determine that the network device indicates the transmission layer number (i.e. rank), TPMI index and DMRS port index; the specific determination manner may refer to the foregoing description, and is not repeated herein.

In the embodiment of the application, the low rank (for example, rank=1 to 4) and the high rank (for example, rank=5 to 8) are associated, so that one low rank and one high rank and one corresponding TPMI index are encoded in one table, and compared with the method of expanding the combined indication of the transmission layer number and the TPMI index of more than 4 antenna ports according to the combined indication mode of the transmission layer number and the TPMI index of 4 antenna ports in the NR protocol, the indication overhead can be reduced; and the TPMI index corresponding to the low rank is unchanged, so that the TPMI index indication of rank=1 to 4 is not affected. In addition, the embodiment of the application multiplexes the DMRS port index tables corresponding to rank=1 to 4 of the existing 4 antenna ports, and indicates the DMRS port index corresponding to rank=5 to 8 by using the redundancy bits (or the reserved values) in the DMRS port index table corresponding to rank=1 to 4 of the 4 antenna ports based on the established rank correspondence, so that no additional DMRS port index table is required to be added, and therefore no additional indication information overhead is introduced, and the redundancy indication bits can be reduced. The terminal device in this embodiment of the present application determines, in a combined manner, the number of transmission layers (i.e., rank), the TPMI index, and the DMRS port index when performing uplink transmission by itself, through the values of the first indication information and the second indication information, and the antenna capability of itself.

Therefore, the embodiment of the application not only can support the combined indication of the transmission layer number and the TPMI index of the port larger than 4 antennas and the indication of the index of the DMRS port larger than 4 antennas, but also can reduce the indication overhead under the condition of not affecting the compatibility.

Example two

In the second embodiment of the present application, based on the correspondence between the low rank (e.g., rank=1 to 4) and the high rank (e.g., rank=5 to 8), the combinations of the rank=1 to 8 and the TPMI indexes corresponding to the respective rank=1 to 8 are encoded in a table, and at least one value in the table indicates a plurality of combinations of the transmission layer number and the TPMI index, and then indicates, through the indication information, which combination of the plurality of combinations is allocated by the network device to the terminal device.

Referring to fig. 5, fig. 5 is a second flowchart of an information indication method according to an embodiment of the present application. The terminal device involved in the method may have more than 4 transmit antennas, such as the terminal device in the present application has 6 transmit antennas or 8 transmit antennas. As shown in fig. 5, the information indication method includes, but is not limited to, the following steps:

s201, the network equipment sends first indication information and third indication information, wherein the first indication information is used for indicating the combination of the transmission layer number and the TPMI index, the transmission layer number corresponds to the TPMI index, the first indication information has at least a first value, and the first value indicates a plurality of combinations of the transmission layer number and the TPMI index; the third indication information indicates one of the plurality of combinations.

Correspondingly, the terminal equipment receives the first indication information and the third indication information.

S202, the terminal equipment determines a combination from the plurality of combinations according to the third indication information.

Optionally, the first indication information and the third indication information may be sent in one signaling, or may be sent in a different signaling, which is not limited in the embodiment of the present application. For example, the first indication information and the third indication information may be carried in Downlink Control Information (DCI) signaling. For example, the first indication information may be a precoding information and number of layers field in DCI signaling for indicating a combination of a transport layer number (i.e. rank) and a TPMI index corresponding to the transport layer number; the third indication information may be one or more of an MCS field, a redundancy version (redundancy version) field, and a new data indication (new data indicator) field in DCI signaling, such as the MCS field and the redundancy version field. When the MCS field corresponding to a certain codeword in DCI signaling takes a special value (e.g. 26) and the redundancy version field corresponding to the codeword also takes a special value (e.g. 1), the method is used for jointly indicating that the codeword (coded) is not enabled (disabled); and when the MCS field corresponding to a certain codeword in the DCI signaling is not 26 or the redundancy version field corresponding to the codeword is not 1, it indicates that the codeword is enabled (enabled), where the MCS field corresponding to the codeword is used to indicate the scheduled MCS index and the redundancy version field corresponding to the codeword is used to indicate the encoded redundancy version information corresponding to the scheduled data.

Optionally, the implementation manner of the first indication information (such as the precoding information and the layer number field) may refer to the related description in the first embodiment, which is not repeated here. Optional combinations of TPMI index and number of transmission layers of the 8 antenna ports in this embodiment of the present application are shown in the foregoing table 11 or the foregoing table 16, and will not be described again here.

As can be appreciated, the downlink control information (downlink control information, DCI) is used to schedule transmission of one or more PUSCHs within a cell, the DCI comprising: a) For transport block (transport block) 1, MCS, new data indication (new data indicator) and redundancy version (redundancy version) are included. b) If the higher layer signaling maxnrofcodewordsschedule dci is configured to be 2 (i.e., 2 codeword transmissions are enabled), then the relevant fields of transport block (transport block) 2 are also included: MCS, new data indication and redundancy version. Wherein, for the combination of the preset coding rate and modulation order in the MCS table, the 5-bit MCS field is used for indicating the dispatching MCS. A new data indication (new data indicator) field for indicating whether the scheduled PUSCH is new or retransmitted data. A redundancy version (redundancy version) field for indicating encoded redundancy version information corresponding to the scheduled data. The DCI format may be format 0_1 or format 0_2.

It can also be appreciated that if the higher layer signaling maxnrofcodewordsschedule bydci is configured to be 2, when a field corresponding to one of the fields corresponding to 2 transport blocks in the DCI indicates I _MCS =26 and rv _id =1, then this indicates that the transport block is not enabled (or that no data is sent by the transport block, only one transport block is transmitted). Wherein I is _MCS The expression =26 can be understood as the MCS field having a value of 26, rv _id The value of the redundancy version field is 1, which can be understood as =1. If the value of the MCS field corresponding to a certain transport block is not 26 or the value of the redundancy version field is not 1, the transport block is enabled (enabled); at this time, the MCS field is used to indicate a scheduled MCS index, and the redundancy version field is used to indicate encoded redundancy version information corresponding to scheduled data. When all 2 transport blocks are enabled (i.e., 2 transport blocks are transmitted), then the fields corresponding to transport block 1 and transport block 2 correspond to codeword 0 (codeword 0) and codeword 1 (codeword 1), respectively. If only one transport block is enabled (only one transport block is transmitted), the enabled transport block corresponds to the first codewid.

Accordingly, the third indication information may indicate the first combination of the plurality of combinations by indicating that one codeword of two codewords (codeewords) is enabled. For example, the network device sets the value of the MCS field corresponding to a certain transport block in the DCI to 26, and the value of the redundancy version field to 1, which indicates that the transport block is not enabled (disabled), that is, the codeword corresponding to the transport block is not enabled. At this time, one codeword (enabled) of the two codewords (encoded) is enabled (disabled) and the other codeword (disabled) is not enabled, so that the combination of the transmission layer number indicated by the first indication information and the TPMI index is a first combination of the plurality of combinations. Similarly, the third indication information may indicate a second combination of the plurality of combinations by indicating that both codewords are enabled. Illustratively, the value of the MCS field corresponding to any one of the transport blocks in the DCI is not 26, or the value of the redundancy version field is not 1, which means that all 2 transport blocks are enabled (enabled), i.e., all codewords corresponding to the 2 transport blocks, respectively, are enabled. At this time, both codewords (encoded) are enabled (enabled) to indicate that the combination of the transport layer number indicated by the first indication information and the TPMI index is a second combination of the plurality of combinations.

Optionally, at the receiving end, the terminal device may combine the received first indication information and the third indication information and its own antenna capability to determine the transmission layer number (i.e. rank) indicated by the network device and the TPMI index. For example, when the third indication information received by the terminal device indicates that one codeword of the two codewords is enabled, the terminal device determines a first combination from the multiple combinations by combining its antenna capability, where the number of transmission layers and the TPMI index in the first combination are the number of transmission layers and the TPMI of uplink transmission configured by the network device for the terminal device. When the third indication information received by the terminal equipment indicates that the two codewords are enabled, the terminal equipment determines a second combination from the multiple combinations by combining the antenna capability of the terminal equipment, wherein the transmission layer number and the TPMI index in the second combination are the uplink transmission layer number and the TPMI configured by the network equipment for the terminal equipment.

For example, the optional combination of the number of transmission layers and TPMI index of the 8 antenna ports shown in table 11 is taken as an example. Assuming that the value of the first indication information is 8, if the antenna capability of the terminal device is full coherence, the 2 combinations of indicated rank and TPMI are respectively: rank=2 and tpmi=0 (i.e., first combination); rank=6 and tpmi=0 (i.e., second combination). If the third indication information indicates that one of the two codewords is enabled, the terminal device determines that the network device indicates a combination of rank=2 and tpmi=0 (i.e., the first combination). If the third indication information indicates that both codewords are enabled, the terminal device determines that the network device indicates a combination of rank=6 and tpmi=0 (i.e., a second combination).

In a possible implementation manner, the information indication method may further include: the network device sends second indication information, where the second indication information is used to indicate the DMRS port index. The DMRS port index indicated by the second indication information is associated with the same transmission layer number (i.e., rank) no matter what value the second indication information is. That is, for different rank values (rank=1 to 8), the embodiment of the present application may define different DMRS port index tables as well; i.e. for a rank value, a DMRS port index table is defined. For example, 4 DMRS port index tables may be additionally added for DMRS port indexes corresponding to rank=5 to 8 in the foregoing tables 12a to 15b (or the foregoing tables 17 to 20), and one DMRS port index table includes a DMRS port index corresponding to a rank value.

In another possible implementation manner, the information indication method may further include:

s203, the network equipment sends second indication information, wherein the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with a first combination of the plurality of combinations, and when the second indication information is the value in the second set, the DMRS port index is associated with a second combination of the plurality of combinations.

Correspondingly, the terminal equipment receives the second indication information.

S204, the terminal equipment determines the DMRS port index of the terminal equipment according to the value of the second indication information.

Optionally, the second indication information may be sent in the same signaling as the first indication information and/or the third indication information, or may be sent in a different signaling, which is not limited in the embodiment of the present application. The second indication information may also be carried in DCI signaling, for example. For example, the second indication information may be an antenna port field in DCI signaling for indicating the DMRS port index. The specific implementation of the second indication information (such as the antenna port field) may refer to the related description in the first embodiment, which is not repeated here. DMRS port index tables corresponding to different ranks (e.g., rank=1 to 8) in the embodiment of the present application are shown in the foregoing tables 12a to 15b or the foregoing tables 17 to 20, and will not be repeated here.

It will be appreciated that the second indication information is interrelated with the third indication information described above. For example, if the third indication information indicates that one codeword of the two codewords is enabled, the value of the second indication information belongs to the first set; if the third indication information indicates that both codewords are enabled, the value of the second indication information belongs to the second set.

In the embodiment of the application, the rank=1 to 4 (called low rank) and the rank=5 to 8 (called high rank) are associated, so that one low rank and the corresponding TPMI index thereof and one high rank and the corresponding TPMI index thereof are encoded in one table, the TPMI index corresponding to the low rank is unchanged, the combined indication of the transmission layer number (1 layer to 8 layers) of the 8 antenna ports and the TPMI index can be supported, and the indication overhead can be reduced under the condition that the compatibility is not affected. In addition, because at least one value in the optional combination table of the rank and the TPMI index of the 8 antenna port designed in the embodiment of the present application indicates a plurality of combinations, the embodiment of the present application further indicates, through one indication information, which combination of the plurality of combinations is allocated to the terminal device by the network device, so that the terminal device can uniquely determine the transmission layer number and the TPMI index allocated to the terminal device by the network device. In the embodiment of the present application, DMRS port index tables corresponding to rank=1 to 4 of existing 4 antenna ports are multiplexed, and the DMRS port index corresponding to rank=5 to 8 is indicated by using redundancy bits (or reserved values) in the DMRS port index tables corresponding to rank=1 to 4 of the 4 antenna ports based on the established rank correspondence, so that no additional DMRS port index table is required to be added, and therefore no additional indication information overhead is introduced, and the redundancy indication bits can be reduced.

Example III

In the third embodiment of the present application, based on the correspondence between the low rank (e.g., rank=1-4) and the high rank (e.g., rank=5-8), the DMRS port indexes corresponding to the two ranks having the correspondence are encoded in a table, at least one value in the table indicates multiple DMRS port index groups, and the indication information indicates which DMRS port index group of the multiple DMRS port index groups is allocated to the terminal device by the network device.

Referring to fig. 6, fig. 6 is a third flowchart of an information indication method according to an embodiment of the present application. The terminal device involved in the method may have more than 4 transmit antennas, such as the terminal device in the present application has 6 transmit antennas or 8 transmit antennas. As shown in fig. 6, the information indication method includes, but is not limited to, the following steps:

and S301, the network equipment sends fourth indication information and third indication information, the fourth indication information is used for indicating the DMRS port index, the fourth indication information has at least a second value, the second value indicates a plurality of DMRS port index groups, each DMRS port index group comprises at least one DMRS port index, and the third indication information indicates one of the plurality of DMRS port index groups.

Correspondingly, the terminal equipment receives the fourth indication information and the third indication information.

S302, the terminal equipment determines a DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

Optionally, the fourth indication information and the third indication information may be sent in one signaling, or may be sent in a different signaling, which is not limited in the embodiment of the present application. For example, the fourth indication information and the third indication information may be carried in Downlink Control Information (DCI) signaling. For example, the fourth indication information may be an antenna port field in DCI signaling for indicating the DMRS port index; the third indication information may be one or more of an MCS field, a redundancy version field, and a new data indication field in DCI signaling, such as the MCS field and the redundancy version field. The specific MCS field and redundancy version field joint indication codeword is not enabled refer to the related description of the second embodiment, and is not repeated here.

Optionally, the fourth indication information (such as an antenna port field) has at least one value (which is denoted as a second value for convenience of description), and the value (i.e., the second value) indicates a plurality of DMRS port index groups, where each DMRS port index group includes at least one DMRS port index. Illustratively, the plurality of DMRS port index sets includes at least a first DMRS port index set and a second DMRS port index set. The first DMRS port index set and the second DMRS port index set are respectively associated with different transmission layers. In other words, the number of DMRS port indexes included in the first DMRS port index group is different from the number of DMRS port indexes included in the second DMRS port index group.

Optionally, the third indication information may indicate the first DMRS port index group of the plurality of DMRS port index groups by indicating that one of two codewords is enabled. For example, the network device sets the value of the MCS field corresponding to a certain transport block in the DCI to 26 and the value of the redundancy version field to 1 to indicate that the codeword corresponding to the transport block is not enabled. Similarly, the third indication information may indicate a second DMRS port index group of the plurality of DMRS port index groups by indicating that both codewords are enabled. For example, the value of the MCS field corresponding to any one transport block in the DCI is not 26, or the value of the redundancy version field is not 1, which means that the codewords corresponding to the 2 transport blocks are all enabled. It can be understood that the meaning of the third indication information in the embodiment of the present application is similar to that of the third indication information in the second embodiment, and the difference is that: the third indication information in the second embodiment indicates one of the plurality of combinations by indicating that one of the two codewords is enabled, and the third indication information in the embodiment of the present application indicates one of the plurality of DMRS combinations by indicating that one of the two codewords is enabled.

It can be appreciated that in order to support uplink transmissions of greater than 4 layers, the indication of DMRS port index needs to be designed. The following illustrates how the fourth indication information (e.g., antenna port field) indicates the DMRS port index in the embodiment of the present application.

In one example, rank=5 to 8 is associated with rank=1 to 4 in a one-to-one correspondence. With rank=1 corresponding to rank=5, rank=2 corresponding to rank=6, rank=3 corresponding to rank=7, and rank=4 corresponding to rank=8 as an example. Taking the dual symbol Type 1DMRS as an example, according to the correspondence, in the embodiment of the present application, DMRS port indexes corresponding to rank=1 and rank=5 are encoded in a table, as shown in the following table 21; the DMRS port indexes corresponding to rank=2 and rank=6, respectively, are encoded in a table, as shown in table 22 below; the DMRS port indexes corresponding to rank=3 and rank=7, respectively, are encoded in a table, as shown in table 23 below; DMRS port indexes corresponding to rank=4 and rank=8, respectively, are encoded in a table, as shown in table 24 below. The first column in tables 21 to 24 represents the value of the fourth indication information (such as the antenna port field), and the third column and the sixth column represent DMRS port indexes corresponding to different ranks. The meaning of the other column parameters in tables 21 to 24 may refer to existing standards or protocols and will not be described in detail here. As can be seen from tables 21 to 24, the fourth indication information (e.g., antenna port field) has at least one value indicating a plurality of DMRS port index groups. For example, rank=1 or rank=5, the value of the antenna port field is 3, and the indicated 2 DMRS port index groups are: 1 (i.e., first DMRS port index set); 0,1,2,3,4 (i.e., second DMRS port index set).

Table 21: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=1 and 5

Table 22: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=2 and 6

Table 23: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=3 and 7

Table 24: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=4 and 8

In another example, rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5. Taking the dual symbol Type 1DMRS as an example, according to the correspondence, in the embodiment of the present application, DMRS port indexes corresponding to rank=1 and rank=8 are encoded in a table, as shown in the following table 25; the DMRS port indexes corresponding to rank=2 and rank=7, respectively, are encoded in a table, as shown in table 26 below; the DMRS port indexes corresponding to rank=3 and rank=6, respectively, are encoded in a table, as shown in table 27 below; DMRS port indexes corresponding to rank=4 and rank=5, respectively, are encoded in a table, as shown in table 28 below. The first column in tables 25 to 28 represents the value of the fourth indication information (such as the antenna port field), and the third column and the sixth column represent DMRS port indexes corresponding to different ranks. As can be seen from tables 25 to 28, the fourth indication information (e.g., antenna port field) has at least one value indicating a plurality of DMRS port index groups. For example, rank=1 or rank=8, the value of the antenna port field is 1, and the indicated 2 DMRS port index groups are: 1 (i.e., first DMRS port index set); 0,1,4,5,8,9,12,13 (i.e., second DMRS port index set).

Table 25: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=1 and 8

Table 26: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=2 and 7

Table 27: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=3 and 6

Table 28: DMRS port index, DMRS-type=1, maximum DMRS symbol number of 2, rank=4 and 5

According to the embodiment of the application, the DMRS port indexes corresponding to the two rank with the corresponding relation are encoded in one table, so that at least one value exists in fourth indication information (such as an antenna port field), the value indicates a plurality of DMRS port index groups, bit cost of the DMRS port index indication is not increased, 4 DMRS port index tables are not required to be additionally increased, additional indication information cost is not introduced, and redundant indication bits can be reduced.

It will be appreciated that although the two examples (tables 21 to 28) above are each exemplified by 8 antenna ports, and a maximum of 8 layers of uplink transmission is supported, the present application may also be applicable to uplink transmissions with other transmission layers greater than 4 layers, such as a maximum of 6 layers of uplink transmission. The implementation manner of the fourth indication information under the 6 antenna port (i.e., the indication manner of the DMRS port index) may refer to the implementation manner when the 8 antenna port is implemented, which is not described herein in detail. For 6 antenna ports, a one-to-one correspondence relationship can be established between rank=5-6 and rank=1-2, rank=1 corresponds to rank=5, and rank=2 corresponds to rank=6; alternatively, a one-to-one correspondence between rank=5 to 6 and rank=3 to 4 may be established under the 6 antenna ports, rank=4 corresponds to rank=5, and rank=3 corresponds to rank=6; how to indicate the DMRS port index under the 6 antenna ports may refer to the indication manner under the 8 antenna ports, which is not described in detail here. It will also be appreciated that the following description will be given by taking an 8-antenna port as an example for convenience of description.

Optionally, at the receiving end, the terminal device may combine the received fourth indication information and the third indication information to determine the DMRS port index indicated by the network device. For example, when the third indication information received by the terminal device indicates that one codeword of the two codewords is enabled, the terminal device determines a first DMRS port index group from the DMRS port index groups. And when the third indication information received by the terminal equipment indicates that the two codewords are enabled, the terminal equipment determines a second DMRS port index group from the plurality of DMRS port index groups.

For example, rank=1 corresponds to rank=5, rank=2 corresponds to rank=6, rank=3 corresponds to rank=7, and rank=4 corresponds to rank=8. Assuming rank=8, the corresponding DMRS port index table is table 24 described above. Assuming that the value of the fourth indication information is 2, the indicated 2 DMRS port index groups are respectively: 2,3,6,7 (i.e., first DMRS port index set) and 0,1,2,3,4,5,6,7 (i.e., second DMRS port index set). If the third indication information indicates that one of the two codewords is enabled, the DMRS port index indicated by the network device is 2,3,6,7 (i.e., the first DMRS port index group). If the third indication information indicates that both codewords are enabled, the DMRS port index indicating the network device indication is 0,1,2,3,4,5,6,7 (i.e., the second DMRS port index set).

In the embodiment of the present application, DMRS port index tables corresponding to rank=1 to 4 of the existing 4 antenna ports are multiplexed, and association is established between rank=1 to 4 (referred to as low rank) and rank=5 to 8 (referred to as high rank), so that DMRS port index corresponding to one low rank and DMRS port index corresponding to one high rank are encoded in one table, and at least one value exists in the table to indicate multiple DMRS port index groups (each DMRS port index group includes at least one DMRS port index), so that no additional DMRS port index table is required to be added, no additional indication information overhead is introduced, and redundant indication bits can be reduced. In addition, the embodiment of the application indicates, through an indication message, which DMRS port index of the multiple DMRS port index groups the DMRS port index allocated to the terminal device by the network device is, so that the terminal device can uniquely determine the DMRS port index allocated to the terminal device by the network device. Therefore, the embodiment of the application can support the DMRS port index indication of 8 antenna ports.

In a possible implementation manner, the information indication method may further include: the network device transmits first indication information, where the first indication information is used to indicate a combination of a transport layer number and a TPMI index. Wherein a value of the first indication information indicates a combination of the number of transmission layers and the TPMI index. That is, an optional combination of the number of transmission layers and TPMI index of the 8 antenna ports is indicated with one value.

In another possible implementation manner, the information indication method further includes:

s303, the network equipment sends first indication information, wherein the first indication information is used for indicating the combination of the transmission layer number and the TPMI index, the transmission layer number corresponds to the TPMI index, the first indication information at least has a first value, the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, and the plurality of combinations comprise a first combination and a second combination; the first combination associates a first DMRS port index set of the plurality of DMRS port index sets, and the second combination associates a second DMRS port index set of the plurality of DMRS port index sets.

Correspondingly, the terminal equipment receives the first indication information.

Alternatively, the implementation manner of step S303 in the embodiment of the present application may refer to the implementation manner of the same or corresponding part in step S101 in the first embodiment, or refer to the implementation manner of the same or corresponding part in step S201 in the second embodiment, which is not described herein in detail.

Alternatively, the third indication information may indicate the first combination of the plurality of combinations by indicating that one codeword of two codewords (codewords) is enabled. For example, the network device sets the value of the MCS field corresponding to a certain transport block in the DCI to 26 and the value of the redundancy version field to 1 to indicate that the codeword corresponding to the transport block is not enabled. Similarly, the third indication information may indicate a second combination of the plurality of combinations by indicating that both codewords are enabled. For example, the value of the MCS field corresponding to any one transport block in the DCI is not 26, or the value of the redundancy version field is not 1, which means that the codewords corresponding to the 2 transport blocks are all enabled.

S304, the terminal equipment determines a combination from the plurality of combinations according to the third indication information.

Alternatively, the implementation manner of step S304 in the embodiment of the present application may refer to the implementation manner of step S202 in the second embodiment, which is not described herein.

In the embodiment of the application, the rank=1 to 4 (called low rank) and the rank=5 to 8 (called high rank) are associated, so that one low rank and the corresponding TPMI index thereof and one high rank and the corresponding TPMI index thereof are encoded in one table, the TPMI index corresponding to the low rank is unchanged, the combined indication of the transmission layer number (1 layer to 8 layers) of the 8 antenna ports and the TPMI index can be supported, and the indication overhead can be reduced under the condition that the compatibility is not affected. In addition, because at least one value in the optional combination table of the rank and the TPMI index of the 8 antenna port designed in the embodiment of the present application indicates a plurality of combinations, the embodiment of the present application further indicates, through one indication information, which combination of the plurality of combinations is allocated to the terminal device by the network device, so that the terminal device can uniquely determine the transmission layer number and the TPMI index allocated to the terminal device by the network device.

Example IV

The fourth embodiment of the present application mainly describes how to support SRS resource index indication of greater than 4 SRS resources, so as to support non-codebook transmission of greater than 4 layers.

Referring to fig. 7, fig. 7 is a fourth flowchart of an information indicating method according to an embodiment of the present application. The terminal device involved in the method may have more than 4 transmit antennas, such as the terminal device in the present application has 6 transmit antennas or 8 transmit antennas. As shown in fig. 7, the information indication method includes, but is not limited to, the steps of:

s401, the network device sends fifth indicating information and second indicating information, wherein the fifth indicating information is used for indicating SRS resource indexes, and the fifth indicating information at least has a first value, and the first value indicates a plurality of SRS resource index groups, and each SRS resource index group comprises at least one SRS resource index; the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with a first transmission layer number, and when the second indication information is the value in the second set, the DMRS port index is associated with a second transmission layer number.

Correspondingly, the terminal equipment receives the fifth indication information and the second indication information.

S402, the terminal equipment determines an SRS resource index group from the SRS resource index groups according to the value of the second indication information.

Optionally, the fifth indication information and the second indication information may be sent in one signaling, or may be sent in a different signaling, which is not limited in the embodiment of the present application. For example, the fifth indication information and the second indication information may be carried in DCI signaling. For example, the fifth indication information may be an SRS Resource Indication (SRI) field in DCI signaling for indicating an SRS resource index; the second indication information may be an antenna port field in DCI signaling for indicating the DMRS port index.

Alternatively, the implementation of the second indication information (such as the antenna port field) may refer to the related description in the first embodiment, which is not repeated here. DMRS port index tables corresponding to different ranks (e.g., rank=1 to 8) in the embodiment of the present application are shown in the foregoing tables 12a to 15b or the foregoing tables 17 to 20, and will not be repeated here.

Optionally, the fifth indication information (such as the SRI field) has at least one value (which is denoted as a first value for convenience of description), and the value (i.e., the first value) indicates a plurality of SRS resource index groups, each SRS resource index group including at least one SRS resource index. It can be appreciated that the first value in the embodiment of the present application and the first value in the first embodiment are independent, and are not necessarily the same, or are not necessarily different; merely as a representation for ease of description. The plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The number of SRS resource indexes contained in the first SRS resource index group is equal to the first transmission layer number, or the first SRS resource index group is associated with the first transmission layer number. The number of SRS resource indexes contained in the second SRS resource index group is equal to the second transmission layer number, or the second SRS resource index group is associated with the second transmission layer number. Wherein the first transmission layer number is one of 1, 2, 3 and 4, and the second transmission layer number is one of 5, 6, 7 and 8. For example, taking an 8-antenna port as an example, when the first transmission layer number is 1, the second transmission layer number is 5; when the first transmission layer number is 2, the second transmission layer number is 6; when the first transmission layer number is 3, the second transmission layer number is 7; when the first transmission layer number is 4, the second transmission layer number is 8. Or when the first transmission layer number is 1, the second transmission layer number is 8; when the first transmission layer number is 2, the second transmission layer number is 7; when the first transmission layer number is 3, the second transmission layer number is 6; when the first transmission layer number is 4, the second transmission layer number is 5. Of course, the first transmission layer number and the second transmission layer number may have other corresponding relations, which are not limited to the above examples, and the embodiment of the present application does not limit the corresponding relations between the transmission layer numbers.

It can be appreciated that in order to support maximum 8-layer non-codebook transmission, an indication of SRS resource index needs to be designed. The following illustrates how the fifth indication information (e.g., SRI field) indicates the SRS resource index in the embodiment of the present application.

For example, rank=1 corresponds to rank=8, rank=2 corresponds to rank=7, rank=3 corresponds to rank=6, and rank=4 corresponds to rank=5. It can be understood that, the first SRS resource index group is associated with the first transmission layer number, the second SRS resource index group is associated with the second transmission layer number, and in the embodiment of the present application, the rank=1 to 4 is associated with the rank=5 to 8, so that there is also an association between the plurality of SRS resource index groups indicated by the first value. In the embodiment of the present application, based on the correspondence between the ranks, the plurality of SRS resource index groups having the association relationship are indicated in a combined manner (for example, the plurality of SRS resource index groups having the association relationship are indicated by one value), and a specific example is shown in the following table 29. The meaning of each parameter and each column in table 29 is referred to the related description of table 10, and is not repeated here. As can be seen from table 29, the fifth indication information (e.g., SRI field) has at least one value indicating a plurality of SRS resource index groups. For example, N _SRS =8, the value of the sri field is 0, then the indicated 2 SRS resource index groups are respectively: 0,1,2,3,4,5,6,7 (i.e., the second SRS resource index group) and 0 (i.e., the first SRS resource index group).

It should be understood that N _SRS When=8, the SRS resource index group corresponding to rank=1 is a combination of 1 SRS resource index selected from 8 SRS resource indexes of 0 to 7, i.e. the SRS resource index group corresponding to rank=1 shares C ₈ ¹ =8. Similarly, N _SRS When=8, the SRS resource index group corresponding to rank=2 is a combination of 2 SRS resource indexes selected from 8 SRS resource indexes of 0 to 7, that is, the SRS resource index group corresponding to rank=2 shares C ₈ ² = (8×7)/(2*1) =28. N (N) _SRS When 8, the SRS resource index group corresponding to rank=3 is a combination of 3 SRS resource indexes selected from 8 SRS resource indexes of 0 to 7, and C is shared ₈ ³ = (8×7×6)/(3×2×1) =56。N _SRS When 8, the SRS resource index group corresponding to rank=4 is a combination of 4 SRS resource indexes selected from 8 SRS resource indexes of 0 to 7, and C is the total ₈ ⁴ = (8×7×6×5)/(4×3×2×1) =70. Similarly, N _SRS When=8, the SRS resource index group corresponding to rank=5 shares C ₈ ⁵ The SRS resource index groups corresponding to rank=6 share C ₈ ⁶ The SRS resource index group corresponding to rank=7 shares C ₈ ⁷ The SRS resource index groups corresponding to rank=8 share C ₈ ⁸ And each. It can be seen that when N _SRS When=8, the larger the rank value, the more SRS resource index groups it corresponds to. For the sake of space, table 29 below only shows a part of the values of the SRI field and the SRS resource index group indicated by the part of the values. In practice, the following table 29 may include N _SRS When=8, rank=1 to 8 corresponds to all SRS resource index groups.

Table 29: SRI field example 2

/>

Because of N _SRS When=8, rank=1 to 8 corresponds to the total number of SRS resource index groups (equal to C ₈ ¹ +C ₈ ² +C ₈ ³ +C ₈ ⁴ +C ₈ ⁵ +C ₈ ⁶ +C ₈ ⁷ +C ₈ ⁸ ) Since there are a lot of values, the embodiment of the present application establishes a correspondence between rank=1 to 4 and rank=5 to 8, and based on the correspondence, makes the fifth indication information (such as the SRI field) have at least one value, where the value indicates a plurality of SRS resource index groups, and reduces the indication overhead compared with a manner that one value indicates one SRS resource index group.

It will be appreciated that, although the above example (table 29) is exemplified by 8 antenna ports, and 8 layers of uplink transmission is supported at maximum, the present application may also be applicable to uplink transmissions with other transmission layers greater than 4 layers, such as uplink transmissions with 6 layers at maximum. The implementation manner of the fifth indication information under the 6 antenna port (i.e., the indication manner of the SRS resource index) may refer to the implementation manner when the 8 antenna port is implemented, which is not described in detail herein. For 6 antenna ports, a one-to-one correspondence relationship can be established between rank=5 to 6 and rank=3 to 4, rank=4 corresponds to rank=5, and rank=3 corresponds to rank=6; how to indicate the SRS resource index under the 6 antenna ports may refer to the indication manner under the 8 antenna ports, which is not described in detail here. It will also be appreciated that the following description will be given by taking an 8-antenna port as an example for convenience of description.

In some scenarios, in order to further reduce the indication overhead, the embodiments of the present application may also select a part of SRS resource index groups in the SRS resource index groups corresponding to each rank to indicate. That is, the above table 29 may include only N _SRS When=8, rank=1 to 8 corresponds to part of all SRS resource index groups.

Optionally, at the receiving end, the terminal device may combine the received fifth indication information (such as the SRI field) and the received second indication information (such as the antenna port field), to determine that the network device indicates the SRS resource index and the DMRS port index. Specifically, after receiving the fifth indication information (such as the SRI field) and the second indication information (such as the antenna port field), the terminal device may determine, according to the number of SRS resource indexes respectively included in the plurality of SRS resource index groups and the value of the second indication information, which DMRS port indexes indicated by the second indication information have, and may determine, according to the number of DMRS port indexes indicated by the second indication information, one SRS resource index group from the plurality of SRS resource index groups. For example, if the number of DMRS port indexes indicated by the second indication information is the same as the number of SRS resource indexes included in the first SRS resource index group in the plurality of SRS resource index groups; the terminal equipment determines a first SRS resource index group, where the SRS resource index included in the first SRS resource index group is an SRS resource index configured by the network equipment for the terminal equipment. If the number of the DMRS port indexes indicated by the second indication information is the same as the number of the SRS resource indexes included in the second SRS resource index group in the plurality of SRS resource index groups; the terminal equipment determines a second SRS resource index group, where the SRS resource index included in the second SRS resource index group is an SRS resource index configured by the network equipment for the terminal equipment.

For example, taking the above table 29 as an example, assume N _SRS =8, the value of the fifth indication information is 0, and the indicated SRS resource index groups are respectively: 0,1,2,3,4,5,6,7 (i.e., the second SRS resource index group) and 0 (i.e., the first SRS resource index group). Based on the number of SRS resource indexes respectively contained in the first SRS resource index group and the second SRS resource index group, the terminal device may determine that the rank indicated by the network device is 1 or the rank is 5, taking the dual symbol Type 1DMRS as an example, and the corresponding DMRS port index table is the table 12a. If the value of the second indication information is one value from 0 to 13, for example, 0, it indicates that the network device indicates rank=1, and the corresponding SRS resource index is 0, that is, the first SRS resource index group may be determined. If the value of the second indication information is 14, it indicates that the network device indicates rank=5, and the corresponding SRS resource indexes are 0,1,2,3,4,5,6, and 7, so that the second SRS resource index group can be determined.

In the embodiment of the application, a low rank (for example, rank=1 to 4) and a high rank (for example, rank=5 to 8) are associated, so that an SRS resource index group corresponding to the low rank and an SRS resource index group corresponding to the high rank are also associated with each other, and a plurality of SRS resource index groups with association relationship are indicated in a combined manner, for example, a value is used for indicating a plurality of SRS resource index groups with association relationship; the SRS resource index indication of more than 4 SRS resources can be supported, so that non-codebook transmission of more than 4 layers is supported, and the transmission performance is improved. In addition, in the embodiment of the present application, DMRS port index tables corresponding to rank=1 to 4 of the existing 4 antenna ports are multiplexed, and the DMRS port index corresponding to rank=5 to 8 is indicated by using redundancy bits (or reserved values) in the DMRS port index tables corresponding to rank=1 to 4 of the 4 antenna ports based on the established rank correspondence, so that no additional DMRS port index table is required to be added, and therefore no additional indication information overhead is introduced, and the redundancy indication bits can be reduced.

Example five

The fifth embodiment of the present application mainly introduces another way of supporting SRS resource index indication of greater than 4 SRS resources, so as to support non-codebook transmission of greater than 4 layers.

Referring to fig. 8, fig. 8 is a fifth flowchart of an information indicating method according to an embodiment of the present application. The terminal device involved in the method may have more than 4 transmit antennas, such as the terminal device in the present application has 6 transmit antennas or 8 transmit antennas. As shown in fig. 8, the information indication method includes, but is not limited to, the steps of:

s501, the network equipment sends fifth indicating information and third indicating information, wherein the fifth indicating information is used for indicating SRS resource indexes, and the fifth indicating information at least has a first value, the first value indicates a plurality of SRS resource index groups, and each SRS resource index group comprises at least one SRS resource index; the third indication information indicates one of the plurality of SRS resource index groups.

Correspondingly, the terminal equipment receives the fifth indication information and the third indication information.

S502, the terminal equipment determines an SRS resource index group from the SRS resource index groups according to the third indication information.

Optionally, the fifth indication information and the third indication information may be sent in one signaling, or may be sent in a different signaling, which is not limited in the embodiment of the present application. For example, the fifth indication information and the third indication information may be carried in Downlink Control Information (DCI) signaling. For example, the fifth indication information may be an SRS Resource Indication (SRI) field in DCI signaling for indicating an SRS resource index; the third indication information may be one or more of an MCS field, a redundancy version (redundancy version) field, and a new data indication (new data indicator) field in DCI signaling, such as the MCS field and the redundancy version field. The specific MCS field and redundancy version field are referred to in the related description of the second embodiment for a manner in which they jointly indicate that the codeword is not enabled (disabled), and are not repeated here.

The implementation of the fifth indication information (such as the SRI field) may refer to the related description in the fourth embodiment, which is not repeated here. The value of the SRI field and the SRS resource index indicated by the value in the embodiment of the present application are shown in the foregoing table 29, which is not repeated here. The implementation of the third indication information may refer to the related description in the second embodiment, which is not repeated here.

Optionally, the plurality of SRS resource index groups indicated by the first value include a first SRS resource index group and a second SRS resource index group. The number of SRS resource indexes contained in the first SRS resource index group is equal to the first transmission layer number, or the first SRS resource index group is associated with the first transmission layer number. The number of SRS resource indexes contained in the second SRS resource index group is equal to the second transmission layer number, or the second SRS resource index group is associated with the second transmission layer number. The third indication information may indicate the first SRS resource index group of the plurality of SRS resource index groups by indicating that one codeword of two codewords is enabled. For example, the network device sets the value of the MCS field corresponding to a certain transport block in the DCI to 26 and the value of the redundancy version field to 1 to indicate that the codeword corresponding to the transport block is not enabled. Similarly, the third indication information may indicate a second SRS resource index group of the plurality of SRS resource index groups by indicating that both codewords are enabled. For example, the value of the MCS field corresponding to any one transport block in the DCI is not 26, or the value of the redundancy version field is not 1, which means that the codewords corresponding to the 2 transport blocks are all enabled.

Optionally, at the receiving end, the terminal device may combine the received fifth indication information and the third indication information to determine the SRS resource index indicated by the network device. For example, when the third indication information received by the terminal device indicates that one codeword of the two codewords is enabled, the terminal device determines a first SRS resource index group from the plurality of SRS resource index groups, where the SRS resource index included in the first SRS resource index group is an SRS resource index configured by the network device for the terminal device. And when the third indication information received by the terminal equipment indicates that the two codewords are enabled, the terminal equipment determines a second SRS resource index group from the plurality of SRS resource index groups, wherein the SRS resource index contained in the second SRS resource index group is the SRS resource index configured by the network equipment for the terminal equipment.

For example, consider N as an example in Table 29 above _SRS =8, the value of the fifth indication information is 8, and the indicated SRS resource index groups are respectively: 0,1,2,3,4,5,6 (i.e., the second SRS resource index group) and 0,1 (i.e., the first SRS resource index group). If the third indication information indicates that one codeword of the two codewords is enabled, the terminal device determines that the SRS resource index indicated by the network device is 0,1 (i.e. the first SRS resource index group). If the third indication information indicates that both codewords are enabled, the terminal device determines that the SRS resource index indicated by the network device is 0,1,2,3,4,5,6 (i.e., the second SRS resource index group).

In a possible implementation manner, the information indication method further includes:

s503, the network equipment sends second indication information, wherein the second indication information is used for indicating the DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with a first transmission layer number, and when the second indication information is the value in the second set, the DMRS port index is associated with a second transmission layer number.

Correspondingly, the terminal equipment receives the second indication information and determines the DMRS port index.

Alternatively, the implementation manner of step S504 in the embodiment of the present application may refer to the implementation manner of the same or corresponding part in step S401 in the fourth embodiment, which is not described herein.

In another possible implementation manner, the information indication method further includes: the network device sends fourth indication information, where the fourth indication information is used to indicate DMRS port indexes, and the fourth indication information has at least a second value, where the second value indicates multiple DMRS port index groups, and each DMRS port index group includes at least one DMRS port index. Correspondingly, the terminal equipment receives the fourth indication information. And the terminal equipment determines one DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

In the embodiment of the application, the rank=1 to 4 (called low rank) and the rank=5 to 8 (called high rank) are associated, so that the SRS resource index group corresponding to one low rank and the SRS resource index group corresponding to one high rank are also associated with each other, and a plurality of SRS resource index groups with association relationship are indicated in a combined way, for example, a value is used for indicating a plurality of SRS resource index groups with association relationship; the embodiment of the application also indicates which SRS resource index group in the plurality of SRS resource index groups the SRS resource index allocated to the terminal equipment by the network equipment is through the indication information, so that the terminal equipment can uniquely determine the SRS resource index allocated to the terminal equipment by the network equipment; the SRS resource index indication of maximum 8 SRS resources can be supported, so that the non-codebook transmission of maximum 8 layers is supported, and the transmission performance is improved.

With the continuous evolution of antenna technology and signal processing technology, it is required to support uplink transmission of more than 4 transmitting antennas in the future. In an optional embodiment, for the above uplink transmission based on a codebook (codebook based), the embodiment of the present application further provides 8 a precoding matrix set (codebook) corresponding to the transmitting antenna. For example, the precoding matrix set (codebook) corresponding to 8 antennas may be as shown in tables 30 to 37 below. It is understood that the TPMI index is determined, i.e., a unique precoding matrix is determined. It should be understood that tables 30 through 37 are merely examples, and embodiments of the present application are not limited to the specific contents of the precoding matrix.

Table 30:8 antenna ports, single layer (i.e. rank=1) transmission corresponding precoding matrix sets

/>

Precoding matrices identified for TPMI indices 56 through 63 in table 30 above are as follows:

precoding matrices identified for TPMI indices 64 through 71 in table 30 above are as follows:

table 31:8 antenna ports, 2 layers (i.e. rank=2) transmit corresponding precoding matrix sets

/>

Precoding matrices identified for TPMI indices 70 through 75 in table 31 above are as follows:

/>

table 32:8 antenna ports, 3 layers (i.e. rank=3) transmit corresponding precoding matrix sets

/>

Precoding matrices identified for TPMI indices 48 through 55 in table 32 above are as follows:

table 33:8 antenna ports, 4 layers (i.e. rank=4) transmit corresponding precoding matrix sets

/>

Precoding matrices identified by TPMI indexes 29, 31, 33, 35, 37, 39, 41, and 43 in the above table 33 are as follows:

/>

table 34:8 antenna ports, 5 layers (i.e. rank=5) transmit corresponding precoding matrix sets

Table 35:8 antenna ports, 6 layers (i.e. rank=6) transmit corresponding precoding matrix sets

Table 36:8 antenna ports, 7 layers (i.e. rank=7) transmit corresponding precoding matrix sets

Precoding matrices respectively identified for TPMI indexes 4 to 6 in the above table 36 are as follows:

table 37:8 antenna ports, 8 layers (i.e. rank=8) transmit corresponding precoding matrix sets

Precoding matrices respectively identified for TPMI indexes 3 and 4 in the above table 37 are as follows:

it can be appreciated that antenna architectures and capabilities of different terminal devices have differences, limited by the volume and cost of the terminal devices. The precoding matrices that can be used are different for the transmit antenna capabilities of different terminal equipments. In other words, the range of values of the TPMI index is different for different antenna capabilities. Illustratively, 1) when the antenna capability of the terminal device (or UE) is that all transmit antennas do not support Coherent transmission (Non-Coherent), the terminal device may use precoding matrices identified by TPMI index=0-7 in table 30, TPMI index=0-27 in table 31, TPMI index=0-15 in table 32, TPMI index=0-11 in table 33, TPMI index=0-3 in table 34, TPMI index=0-1 in table 35, TPMI index=0 in table 36, and TPMI index=0 in table 37. 2) When the antenna capability of the terminal device (or UE) is that all transmit antennas support Partial Coherent transmission (Partial Coherent), the terminal device may use precoding matrices identified by TPMI index=8-39 in table 30, TPMI index=28-59 in table 31, TPMI index=16-39 in table 32, TPMI index=12-27 in table 33, TPMI index=4-11 in table 34, TPMI index=2-5 in table 35, TPMI index=1-2 in table 36, and TPMI index=1-2 in table 37. 3) When the antenna capability of the terminal device (or UE) is that all transmit antennas support Coherent transmission (Full Coherent), the terminal device may use precoding matrices identified by TPMI index=40-71 in table 30, TPMI index=60-75 in table 31, TPMI index=40-55 in table 32, TPMI index=28-43 in table 33, TPMI index=12-19 in table 34, TPMI index=6-13 in table 35, TPMI index=3-6 in table 36, and TPMI index=3-4 in table 37. It will be appreciated that when the antenna capability of the terminal device (or UE) is such that all transmit antennas support Coherent transmission (Full Coherent), the terminal device may use any of the precoding matrices in tables 30-37 above, due to its strong antenna capability.

The foregoing details of the method provided in the present application, and in order to facilitate implementation of the foregoing solutions of the embodiments of the present application, the embodiments of the present application further provide corresponding apparatuses or devices.

According to the method embodiment, the network device and the terminal device are divided into the functional modules, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that the division of the modules in this application is illustrative, and is merely a logic function division, and other division manners may be implemented in practice. The network device and the terminal device according to the embodiment of the present application will be described in detail below with reference to fig. 9 to 11.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application, and as shown in fig. 9, the communication device includes a transceiver unit 10 and a processing unit 20.

In some embodiments of the present application, the communication apparatus may be the network device shown above. I.e. the communication means shown in fig. 9 may be adapted to perform the steps or functions etc. performed by the network device in the above method embodiments. The communication device may be, for example, a network device or a chip, which is not limited in this embodiment.

In one design, the transceiver unit 10 is configured to send the first indication information and the second indication information.

Illustratively, the processing unit 20 is configured to generate the first indication information and the second indication information, and send the first indication information and the second indication information through or control the transceiver unit 10.

It will be appreciated that specific descriptions of the first indication information and the second indication information etc. may be referred to the method embodiments shown above, and will not be described in detail here.

It is to be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are merely examples, and reference may be made to the above-described method embodiments (e.g. fig. 4) for specific functions or steps performed by the transceiver unit and the processing unit, which are not described in detail herein.

In another design, the transceiver unit 10 is configured to send the first indication information and the third indication information.

Illustratively, the processing unit 20 is configured to generate the first indication information and the third indication information, and send the first indication information and the third indication information through or control the transceiver unit 10.

In a possible implementation, the transceiver unit 10 is further configured to send the second indication information.

Illustratively, the processing unit 20 is configured to generate the second instruction information, and transmit the second instruction information through or by controlling the transceiver unit 10.

It will be appreciated that specific descriptions of the first indication information, the second indication information, the third indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

It is to be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are merely examples, and reference may be made to the above-described method embodiments (e.g. fig. 5) for specific functions or steps performed by the transceiver unit and the processing unit, which are not described in detail herein.

In yet another design, the transceiver unit 10 is configured to send the fourth indication information and the third indication information.

Illustratively, the processing unit 20 is configured to generate fourth indication information and third indication information, and send the fourth indication information and the third indication information through or control the transceiver unit 10.

In a possible implementation, the transceiver unit 10 is further configured to send the first indication information.

Illustratively, the processing unit 20 is configured to generate the first indication information, and send the first indication information through or control the transceiver unit 10.

It will be appreciated that specific descriptions of the first indication information, the third indication information, the fourth indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

It is to be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are merely examples, and reference may be made to the above-described method embodiments (e.g. fig. 6) for specific functions or steps performed by the transceiver unit and the processing unit, which are not described in detail herein.

In yet another design, the transceiver unit 10 is configured to send the fifth instruction information and the second instruction information.

Illustratively, the processing unit 20 is configured to generate the fifth instruction information and the second instruction information, and transmit the fifth instruction information and the second instruction information through or by controlling the transceiver unit 10.

It will be appreciated that specific descriptions of the fifth indication information, the second indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

It is to be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are merely examples, and reference may be made to the above-described method embodiments (e.g. fig. 7) for specific functions or steps performed by the transceiver unit and the processing unit, which are not described in detail herein.

In yet another design, the transceiver unit 10 is configured to send the fifth indication information and the third indication information.

Illustratively, the processing unit 20 is configured to generate the fifth indication information and the third indication information, and send the fifth indication information and the third indication information through or by controlling the transceiver unit 10.

It will be appreciated that specific descriptions of the fifth indication information, the third indication information, the second indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

It is to be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are merely examples, and reference may be made to the above-described method embodiments (e.g. fig. 8) for specific functions or steps performed by the transceiver unit and the processing unit, which are not described in detail herein.

Multiplexing fig. 9, in other embodiments of the present application, the communication device may be a terminal device as shown above. I.e. the communication means shown in fig. 9 may be used for performing the steps or functions etc. performed by the terminal device in the above method embodiments. The communication device may be, for example, a terminal device or a chip, which is not limited in this embodiment of the present application.

In one design, the transceiver unit 10 is configured to receive the first indication information and the second indication information; the processing unit 20 is configured to determine a combination from the plurality of combinations according to the value of the second indication information.

In another design, the transceiver unit 10 is configured to receive the first indication information and the third indication information; the processing unit 20 is configured to determine a combination from the plurality of combinations according to the third indication information.

In one possible implementation, the plurality of combinations includes a first combination and a second combination. The processing unit 20 is specifically configured to: determining a first combination from the plurality of combinations when the third indication information indicates that one of the two codewords is enabled; when the third indication information indicates that both codewords are enabled, a second combination is determined from the plurality of combinations.

In a possible implementation, the transceiver unit 10 is further configured to receive the second indication information.

In yet another design, the transceiver unit 10 is configured to receive the fourth indication information and the third indication information; and the processing unit 20 is configured to determine one DMRS port index group from the multiple DMRS port index groups according to the third indication information.

In one possible implementation, the plurality of DMRS port index sets includes a first DMRS port index set and a second DMRS port index set. The processing unit 20 is specifically configured to: determining a first DMRS port index group from the plurality of DMRS port index groups when the third indication information indicates that one of the two codewords is enabled; and determining a second DMRS port index group from the plurality of DMRS port index groups when the third indication information indicates that both codewords are enabled.

In a possible implementation manner, the transceiver unit 10 is further configured to receive the first indication information; the processing unit 20 is configured to determine a combination from the plurality of combinations according to the third indication information.

In a possible implementation, the processing unit 20 is further specifically configured to: determining a first combination from the plurality of combinations when the third indication information indicates that one of the two codewords is enabled; when the third indication information indicates that both codewords are enabled, a second combination is determined from the plurality of combinations.

In yet another design, the transceiver unit 10 is configured to receive the fifth instruction information and the second instruction information; the processing unit 20 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the value of the second indication information.

In yet another design, the transceiver unit 10 is configured to receive the fifth indication information and the third indication information; the processing unit 20 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the third indication information.

In one possible implementation, the plurality of SRS resource index sets includes a first SRS resource index set and a second SRS resource index set. The processing unit 20 is specifically configured to: determining a first SRS resource index group from the plurality of SRS resource index groups when the third indication information indicates that one of the two codewords is enabled; when the third indication information indicates that both codewords are enabled, a second SRS resource index group is determined from the plurality of SRS resource index groups.

The network device and the terminal device according to the embodiments of the present application are described above, and possible product forms of the network device and the terminal device are described below. It should be understood that any product having the functions of the network device described in fig. 9, or any product having the functions of the terminal device described in fig. 9, falls within the scope of the embodiments of the present application. It should also be understood that the following description is only exemplary, and is not intended to limit the product forms of the network device and the terminal device according to the embodiments of the present application.

In a possible implementation, in the communication apparatus shown in fig. 9, the processing unit 20 may be one or more processors, the transceiver unit 10 may be a transceiver, or the transceiver unit 10 may also be a transmitting unit and a receiving unit, the transmitting unit may be a transmitter, and the receiving unit may be a receiver, where the transmitting unit and the receiving unit are integrated into one device, such as a transceiver. In the embodiment of the present application, the processor and the transceiver may be coupled, etc., and the embodiment of the present application is not limited to the connection manner of the processor and the transceiver. In performing the above method, the process of transmitting information (e.g., transmitting the first indication information, the second indication information, the third indication information, the fourth indication information, the fifth indication information, etc.) in the above method may be understood as a process of outputting the above information by a processor. When outputting the information, the processor outputs the information to the transceiver for transmission by the transceiver. This information, after being output by the processor, may also require additional processing before reaching the transceiver. Similarly, the process of receiving information (e.g., receiving the first indication information, the second indication information, the third indication information, the fourth indication information, the fifth indication information, etc.) in the above method may be understood as a process in which the processor receives the input information. When the processor receives the input information, the transceiver receives the information and inputs it to the processor. Further, after the transceiver receives the information, the information may need to be further processed before being input to the processor.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a communication device 1000 according to an embodiment of the present application. The communication apparatus 1000 may be a network device or a terminal device, or a chip therein. Fig. 10 shows only the main components of the communication device 1000. The communication device may further comprise a memory 1003, and input-output means (not shown) in addition to the processor 1001 and the transceiver 1002.

The processor 1001 is mainly used for processing communication protocols and communication data, controlling the entire communication apparatus, executing software programs, and processing data of the software programs. The memory 1003 is mainly used for storing software programs and data. The transceiver 1002 may include a control circuit and an antenna, the control circuit being mainly used for conversion of baseband signals and radio frequency signals and processing of radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the communication device is powered on, the processor 1001 may read the software program in the memory 1003, interpret and execute instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor 1001 performs baseband processing on the data to be transmitted, and outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001, and the processor 1001 converts the baseband signal into data and processes the data.

In another implementation, the radio frequency circuitry and antenna may be provided separately from the processor performing the baseband processing, e.g., in a distributed scenario, the radio frequency circuitry and antenna may be in a remote arrangement from the communication device.

The processor 1001, the transceiver 1002, and the memory 1003 may be connected by a communication bus.

In one design, the communication apparatus 1000 may be configured to perform the functions of the network device in the first embodiment described above: the processor 1001 may generate the first indication information and the second indication information sent in step S101 in fig. 4, and/or other processes for performing the techniques described herein; the transceiver 1002 may be used to perform step S101 in fig. 4, and/or other processes for the techniques described herein.

In another design, the communication apparatus 1000 may be configured to perform the functions of the terminal device in the first embodiment: the processor 1001 may be for performing step S102 in fig. 4, and/or for performing other processes of the techniques described herein; the transceiver 1002 may be configured to receive the first indication information and the second indication information transmitted in step S101 in fig. 4, and/or other processes for the techniques described herein.

In one design, the communication apparatus 1000 may be configured to perform the functions of the network device in the second embodiment described above: the processor 1001 may generate the first and third indication information sent in step S201 and the second indication information sent in step S203 in fig. 5, and/or other processes for performing the techniques described herein; the transceiver 1002 may be used to perform step S201 and step S203 in fig. 5, and/or other processes for the techniques described herein.

In another design, the communication apparatus 1000 may be configured to perform the functions of the terminal device in the second embodiment described above: the processor 1001 may be used to perform step S202 and step S204 in fig. 5, and/or to perform other processes of the techniques described herein; the transceiver 1002 may be configured to receive the first and third indication information transmitted in step S201 and the second indication information transmitted in step S203 in fig. 5, and/or other processes for the techniques described herein.

In one design, the communication apparatus 1000 may be configured to perform the functions of the network device in the third embodiment described above: the processor 1001 may generate the fourth and third indication information sent in step S301 and the first indication information sent in step S303 in fig. 6, and/or other processes for performing the techniques described herein; the transceiver 1002 may be used to perform step S301 and step S303 in fig. 6, and/or other processes for the techniques described herein.

In another design, the communication apparatus 1000 may be configured to perform the functions of the terminal device in the third embodiment described above: the processor 1001 may be used to perform step S302 and step S304 in fig. 6, and/or to perform other processes of the techniques described herein; the transceiver 1002 may be configured to receive the fourth indication information and the third indication information transmitted in step S301 in fig. 6, as well as the first indication information transmitted in step S303, and/or other processes for the techniques described herein.

In one design, the communication apparatus 1000 may be configured to perform the functions of the network device in the fourth embodiment described above: the processor 1001 may generate the fifth and second indication information sent in step S401 of fig. 7, and/or other processes for performing the techniques described herein; the transceiver 1002 may be used to perform step S401 in fig. 7, and/or other processes for the techniques described herein.

In another design, the communication apparatus 1000 may be configured to perform the functions of the terminal device in the fourth embodiment described above: the processor 1001 may be for performing step S402 in fig. 7, and/or for performing other processes of the techniques described herein; the transceiver 1002 may be configured to receive the fifth and second indication information transmitted in step S401 in fig. 7, and/or other processes for the techniques described herein.

In one design, the communication apparatus 1000 may be configured to perform the functions of the network device in the fifth embodiment described above: the processor 1001 may generate the fifth and third indication information sent in step S501 and the second indication information sent in step S503 in fig. 8, and/or other processes for performing the techniques described herein; the transceiver 1002 may be used to perform step S501 and step S503 in fig. 8, and/or other processes for the techniques described herein.

In another design, the communication apparatus 1000 may be configured to perform the functions of the terminal device in the fifth embodiment described above: the processor 1001 may be for performing step S502 in fig. 8, and/or for performing other processes of the techniques described herein; the transceiver 1002 may be configured to receive the fifth and third indication information transmitted in step S501 and the second indication information transmitted in step S503 in fig. 8, and/or other processes for the techniques described herein.

In either of the designs described above, a transceiver for implementing the receive and transmit functions may be included in the processor 1001. For example, the transceiver may be a transceiver circuit, or an interface circuit. The transceiver circuitry, interface or interface circuitry for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit, interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, interface or interface circuit may be used for transmitting or transferring signals.

In any of the above designs, the processor 1001 may store instructions, which may be a computer program, running on the processor 1001, which may cause the communication device 1000 to perform the method described in the above method embodiments. The computer program may be solidified in the processor 1001, in which case the processor 1001 may be implemented in hardware.

In one implementation, the communications apparatus 1000 can include circuitry that can implement the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described herein may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, wireless radio frequency integrated circuits (radio frequency integrated circuit, RFIC), mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronics, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The scope of the communication device described in the present application is not limited thereto, and the structure of the communication device may not be limited by fig. 10. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem;

(2) A set of one or more ICs, optionally including storage means for storing data, a computer program;

(3) An ASIC, such as a Modem (Modem);

(4) Modules that may be embedded within other devices;

(5) Receivers, terminals, smart terminals, cellular telephones, wireless devices, handsets, mobile units, vehicle devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6) Others, and so on.

In another possible implementation, in the communications apparatus shown in fig. 9, the processing unit 20 may be one or more logic circuits, and the transceiver unit 10 may be an input-output interface, which is also referred to as a communications interface, or an interface circuit, or an interface, or the like. Alternatively, the transceiver unit 10 may be a transmitting unit and a receiving unit, the transmitting unit may be an output interface, and the receiving unit may be an input interface, and the transmitting unit and the receiving unit are integrated into one unit, for example, the input/output interface. Referring to fig. 11, fig. 11 is another schematic structural diagram of a communication device according to an embodiment of the present application. As shown in fig. 11, the communication apparatus shown in fig. 11 includes a logic circuit 901 and an interface 902. That is, the processing unit 20 may be implemented by a logic circuit 901, and the transceiver unit 10 may be implemented by an interface 902. The logic circuit 901 may be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, and the interface 902 may be a communication interface, an input/output interface, a pin, or the like. Fig. 11 exemplifies the communication device described above as a chip including a logic circuit 901 and an interface 902.

In the embodiment of the application, the logic circuit and the interface may also be coupled to each other. The embodiments of the present application are not limited to specific connection manners of logic circuits and interfaces.

Illustratively, when the communication device is configured to perform the method or function or step performed by the network device in the foregoing embodiment one, the logic circuit 901 is configured to generate the first indication information and the second indication information; an interface 902, configured to output the first indication information and the second indication information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the terminal device in the foregoing embodiment, the interface 902 is configured to input the first indication information and the second indication information; logic circuit 901 for determining a combination from a plurality of combinations based on the value of the second instruction information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the network device in the second embodiment, the logic circuit 901 is configured to generate the first indication information and the third indication information; an interface 902, configured to output the first indication information and the third indication information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the terminal device in the second embodiment, the interface 902 is configured to input the first indication information and the third indication information; logic circuit 901 for determining a combination from the plurality of combinations based on the third instruction information.

It will be appreciated that specific descriptions of the first indication information, the third indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

Illustratively, when the communication device is configured to perform a method or function or step performed by the network device in the foregoing third embodiment, the logic circuit 901 is configured to generate the fourth indication information and the third indication information; an interface 902, configured to output the fourth indication information and the third indication information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the terminal device in the third embodiment, the interface 902 is configured to input the fourth indication information and the third indication information; logic 901 is configured to determine one DMRS port index group from the plurality of DMRS port index groups according to the third indication information.

It will be appreciated that specific descriptions of the third indication information, the fourth indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

Illustratively, when the communication device is configured to perform a method or function or step performed by the network apparatus in the foregoing fourth embodiment, the logic circuit 901 is configured to generate the fifth instruction information and the second instruction information; an interface 902 for outputting the fifth instruction information and the second instruction information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the terminal device in the foregoing fourth embodiment, the interface 902 is configured to input the fifth instruction information and the second instruction information; logic 901 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the value of the second indication information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the network device in the fifth embodiment, the logic circuit 901 is configured to generate the fifth indication information and the third indication information; an interface 902, configured to output the fifth indication information and the third indication information.

Illustratively, when the communication device is configured to perform a method or function or step performed by the terminal device in the fifth embodiment, the interface 902 is configured to input the fifth instruction information and the third instruction information; logic 901 is configured to determine one SRS resource index group from the plurality of SRS resource index groups according to the third indication information.

It will be appreciated that specific descriptions of the fifth indication information, the third indication information, etc. may refer to the method embodiments shown above, and will not be described in detail here.

It may be understood that the communication device shown in the embodiments of the present application may implement the method provided in the embodiments of the present application in a hardware manner, or may implement the method provided in the embodiments of the present application in a software manner, which is not limited to this embodiment of the present application.

Reference may also be made to the above embodiments for a specific implementation of the embodiments shown in fig. 11, which are not described in detail herein.

The embodiment of the application also provides a wireless communication system, which comprises a network device and a terminal device, wherein the network device and the terminal device can be used for executing the method in any of the previous embodiments.

Furthermore, the present application also provides a computer program for implementing the operations and/or processes performed by the network device in the methods provided herein.

The present application also provides a computer program for implementing the operations and/or processes performed by the terminal device in the method provided in the present application.

The present application also provides a computer readable storage medium having computer code stored therein, which when run on a computer, causes the computer to perform the operations and/or processes performed by the network device in the methods provided herein.

The present application also provides a computer readable storage medium having computer code stored therein, which when run on a computer causes the computer to perform the operations and/or processes performed by the terminal device in the methods provided herein.

The present application also provides a computer program product comprising computer code or a computer program which, when run on a computer, causes operations and/or processes performed by a network device in the methods provided herein to be performed.

The present application also provides a computer program product comprising computer code or a computer program which, when run on a computer, causes operations and/or processes performed by a terminal device in the methods provided herein to be performed.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the technical effects of the scheme provided by the embodiment of the application.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a readable storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned readable storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An information indicating method, comprising:

the network equipment sends first indication information, wherein the first indication information is used for indicating the number of transmission layers and sending a precoding matrix to indicate the combination of the TPMI indexes, the number of transmission layers corresponds to the TPMI indexes, the first indication information has at least a first value, the first value indicates a plurality of combinations of the number of transmission layers and the TPMI indexes, and the plurality of combinations comprise a first combination and a second combination;

the network equipment sends second indication information, wherein the second indication information is used for indicating a demodulation reference signal (DMRS) port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with the first combination, and when the second indication information is the value in the second set, the DMRS port index is associated with the second combination.

2. An information indicating method, comprising:

the method comprises the steps that terminal equipment receives first indication information, wherein the first indication information is used for indicating the number of transmission layers and sending a precoding matrix to indicate the combination of a TPMI index, the number of transmission layers corresponds to the TPMI index, the first indication information at least has a first value, the first value indicates a plurality of combinations of the number of transmission layers and the TPMI index, and the plurality of combinations comprise a first combination and a second combination;

the terminal equipment receives second indication information, wherein the second indication information is used for indicating a demodulation reference signal (DMRS) port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with the first combination, and when the second indication information is the value in the second set, the DMRS port index is associated with the second combination;

the terminal device determines a combination from the plurality of combinations according to the value of the second indication information.

3. The method according to claim 1 or 2, wherein the number of transmission layers in the first combination is one of 1, 2, 3, 4 and the number of transmission layers in the second combination is one of 5, 6, 7, 8.

4. The method of claim 3, wherein when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5;

when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 6;

when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 7;

when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 8.

5. The method of claim 3, wherein when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8;

when the number of transmission layers in the first combination is 2, the number of transmission layers in the second combination is 7;

when the number of transmission layers in the first combination is 3, the number of transmission layers in the second combination is 6;

when the number of transmission layers in the first combination is 4, the number of transmission layers in the second combination is 5.

6. The method according to any one of claims 1-5, wherein the first indication information and the second indication information are both carried in downlink control information.

7. The method according to any of claims 1-6, wherein the first indication information is a precoding information and a layer number field in downlink control information, and the second indication information is an antenna port field in downlink control information.

8. A communication device, comprising:

a transceiver unit, configured to send first indication information, where the first indication information is used to indicate a combination of a transmission layer number and a TPMI index, where the transmission layer number corresponds to the TPMI index, and the first indication information has at least a first value, where the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, and the plurality of combinations includes a first combination and a second combination;

the transceiver unit is configured to send second indication information, where the second indication information is used to indicate a DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with the first combination, and when the second indication information is the value in the second set, the DMRS port index is associated with the second combination.

9. A communication device, comprising:

a transceiver unit, configured to receive first indication information, where the first indication information is used to indicate a combination of a transmission layer number and a transmission precoding matrix indicator TPMI index, where the transmission layer number corresponds to the TPMI index, the first indication information has at least a first value, where the first value indicates a plurality of combinations of the transmission layer number and the TPMI index, and the plurality of combinations includes a first combination and a second combination;

The transceiver unit is further configured to receive second indication information, where the second indication information is used to indicate a demodulation reference signal DMRS port index; the value of the second indication information belongs to one of a plurality of sets, the plurality of sets at least comprises a first set and a second set, when the second indication information is the value in the first set, the DMRS port index is associated with the first combination, and when the second indication information is the value in the second set, the DMRS port index is associated with the second combination;

and a processing unit configured to determine a combination from the plurality of combinations according to the value of the second instruction information.

10. The apparatus of claim 8 or 9, wherein the number of transmission layers in the first combination is one of 1, 2, 3, 4, and the number of transmission layers in the second combination is one of 5, 6, 7, 8.

11. The apparatus of claim 10, wherein when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 5;

12. The apparatus of claim 10, wherein when the number of transmission layers in the first combination is 1, the number of transmission layers in the second combination is 8;

13. The apparatus according to any one of claims 8-12, wherein the first indication information and the second indication information are both carried in downlink control information.

14. The apparatus according to any of claims 8-13, wherein the first indication information is a precoding information and a layer number field in downlink control information, and the second indication information is an antenna port field in downlink control information.

15. A communication device comprising a processor, a transceiver, and a memory; the transceiver is used for receiving and transmitting information;

The memory is used for storing instructions;

the processor is configured to execute the instructions to cause the method of any one of claims 1 to 7 to be performed.

16. A communication device comprising logic circuitry and an interface, the logic circuitry and interface coupled;

the interface being for inputting and/or outputting code instructions, the logic circuitry being for executing the code instructions to cause the method of any of claims 1 to 7 to be performed.

17. A computer readable storage medium, characterized in that the computer readable storage medium is for storing a computer program which, when executed, is adapted to carry out the method of any one of claims 1 to 7.