CN115776364A

CN115776364A - Communication method and device

Info

Publication number: CN115776364A
Application number: CN202211393184.3A
Authority: CN
Inventors: 董昶钊; 高翔; 张哲宁; 刘鹍鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-11-06
Filing date: 2022-11-06
Publication date: 2023-03-10
Also published as: WO2024093975A1

Abstract

The application provides a communication method and device. The method comprises the following steps: the method comprises the steps that terminal equipment obtains at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information, and the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information; the network equipment sends DCI signaling to the terminal equipment, wherein the DCI signaling comprises a first index, the first index is used for indicating first time domain resource allocation information, and the first time domain resource allocation information is one of at least one time domain resource allocation information; and the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information. According to the embodiment of the application, the flexible switching of the DMRS configuration information of the DCI level can be realized, and further the flexible switching of the R15 port and the R18 port and/or the flexible switching of the FD-OCC length can be realized.

Description

Communication method and device

Technical Field

The present application relates to the field of communications, and in particular, to a communication method and apparatus.

Background

In the R15 version of the third generation partnership project (3 rd generation partnership project,3 gpp), two types of demodulation reference signal (DMRS) resource mapping are defined, type1 (type 1) and type2 (type 2), respectively. The upper limit of the number of the DMRS ports corresponding to type1 is 8, and the upper limit of the number of the DMRS ports corresponding to type2 is 12.

With the continuous development of communication technology, 12 DMRS ports cannot meet the communication requirements. Therefore, in release R18 of 3GPP, the number of DMRS ports is expanded (or expanded). As one mode, type1 may be enhanced, and the upper limit of the number of corresponding DMRS ports after type1 enhancement may be 16. As another mode, type2 may be enhanced, and the upper limit of the number of corresponding DMRS ports after type2 enhancement may be 24.

Therefore, in R18, the R18 terminal device may use the R15 port, and may also use the R18 port. Further, the frequency domain mask length of the R15 port is 2, and the frequency domain mask length of the R18 port is 4. Therefore, for the R18 terminal device, how to flexibly switch the R15 port and the R18 port, and flexibly switch the 2-long frequency domain mask and the 4-long frequency domain mask is a problem to be solved urgently.

Disclosure of Invention

The application provides a communication method and device.

In a first aspect, a communication method is provided, including:

the method comprises the steps that terminal equipment obtains at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal (DMRS) configuration information, wherein the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information; the terminal equipment receives a Downlink Control Information (DCI) signaling from the network equipment, wherein the DCI signaling comprises a first index, the first index is used for indicating first time domain resource allocation information, and the first time domain resource allocation information is one of the at least one time domain resource allocation information; and the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

According to the embodiment of the application, the terminal equipment can determine the DMRS configuration information according to the DCI signaling sent by the network equipment, so that the flexible scheduling of the DMRS configuration information of the DCI level is realized. On the basis, flexible switching of the R15DMRS port and the R18 DMRS port and/or flexible switching of the FD-OCC length can be realized.

It should be understood that the terminal device in this application may be an R18 terminal device.

With reference to the first aspect, in certain implementations of the first aspect, the obtaining, by the terminal device, the at least one time domain resource allocation information and the at least one DMRS configuration information includes:

the terminal device receives a Radio Resource Control (RRC) signaling from the network device, wherein the RRC signaling comprises a Time Domain Resource Allocation (TDRA) field, and the TDRA field is used for configuring the at least one time domain resource allocation message and the at least one DMRS configuration message.

In this embodiment, the terminal device may obtain the at least one DMRS configuration information through RRC signaling. In addition, the terminal device may be caused to acquire the at least one DMRS configuration information by predefining the at least one DMRS configuration information in a protocol.

It should be appreciated that DMRS configuration information may be modified more flexibly through RRC signaling acquisition than predefined in the protocol.

With reference to the first aspect, in certain implementations of the first aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of a first type and a second type, and the DCI signaling further includes antenna port indication information; the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information; and the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

With reference to the first aspect, in certain implementations of the first aspect, the plurality of antenna port candidate combinations satisfy any one of:

when the DMRS type information indicates the first type and the first DMRS configuration information indicates a first value, corresponding to a first DMRS type; when the DMRS type information indicates the second type and the first DMRS configuration information indicates a first value, corresponding to a second DMRS type; when the DMRS type information indicates the first type and the first DMRS configuration information indicates a second value, corresponding to a third DMRS type; and when the DMRS type information indicates the second type and the first DMRS configuration information indicates a second value, corresponding to a fourth DMRS type.

Wherein the third DMRS type is an enhancement of the first DMRS type, and the fourth DMRS type is an enhancement of the second DMRS type.

In the embodiment of the present application, the antenna port table (alternatively referred to as DMRS port table) includes a plurality of antenna port candidate combinations. For the first to fourth DMRS types, the antenna port table corresponding to each DMRS type may be different. The terminal equipment can realize the switching of the DMRS types according to the DMRS configuration information indicated by the DCI signaling, thereby realizing the switching between the R15 port and the R18 port and the switching of the frequency domain mask length.

With reference to the first aspect, in certain implementations of the first aspect, a port in the set of antenna port index groups belongs to a first set of DMRS ports when the first DMRS configuration information indicates a first value; when the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

In the embodiment of the present application, the first set of DMRS ports may be understood as a set of R15 ports, and the second set of DMRS ports may be understood as a set of R18 ports.

With reference to the first aspect, in certain implementations of the first aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type, and a fourth DMRS type, and the DCI signaling further includes antenna port indication information; the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information; the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information; and the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the first DMRS configuration information.

With reference to the first aspect, in certain implementations of the first aspect, when the DMRS type information indicates the first DMRS type or the second DMRS type, a port in the set of antenna port index groups belongs to a first set of DMRS ports; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, a port in the set of antenna port index groups belongs to a second set of DMRS ports. .

With reference to the first aspect, in certain implementation manners of the first aspect, the determining, by the terminal device, a frequency domain mask length of a port in the first antenna port index group includes:

when the first DMRS configuration information indicates a first value, the terminal device determines that the frequency domain mask length corresponding to a port in the first antenna port index group is 2; and when the first DMRS configuration information indicates a second value, the terminal equipment determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 4.

According to the embodiment of the application, the terminal equipment can determine the frequency domain mask length corresponding to the port in the antenna port index group according to the DMRS configuration information indicated by the DCI signaling, so that the flexible switching of the frequency domain mask length is realized.

According to the embodiment of the application, the terminal equipment can determine which antenna port table is used according to the DMRS type information and the DMRS configuration information, so that flexible switching of the antenna port table is realized.

With reference to the first aspect, in certain implementations of the first aspect, the set of antenna port index groups satisfies any one of:

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the set of antenna port index groups is a first set of antenna port index groups; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, the set of antenna port index groups is a second set of antenna port index groups; when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value; or, when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, the set of antenna port indices is a third set of antenna port indices.

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, ports in the set of antenna port index groups belong to a subset of a second set of DMRS ports; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports; when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a first set of DMRS ports; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports.

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, ports in the set of antenna port index groups belong to a subset of a second set of DMRS ports; when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

the terminal equipment determines an antenna port index group set according to the DMRS type information; the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information; and the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the DMRS type information and the first DMRS configuration information.

With reference to the first aspect, in some implementation manners of the first aspect, the antenna port index group set includes a second antenna port index group and a third antenna port index group, and a frequency domain mask length of a first port in the second antenna port index group is different from a frequency domain mask length of the first port in the third antenna port index group.

With reference to the first aspect, in certain implementations of the first aspect, the set of antenna port index groups includes a second port and a third port, the second port and the third port are in the same CDM group, the second port is a port in the first set of DMRS ports, and the third port is a port in the second set of DMRS ports.

With reference to the first aspect, in some implementation manners of the first aspect, the antenna port index group set includes a fourth antenna port index group, the fourth antenna port index group includes a fourth port and a fifth port, and a frequency domain mask length corresponding to the fourth port is different from a frequency domain mask length corresponding to the fifth port.

With reference to the first aspect, in certain implementation manners of the first aspect, the determining, by the terminal device, a frequency domain mask length corresponding to a port in the first antenna port combination includes:

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the terminal device determines that the frequency domain mask length corresponding to a port in the first antenna port index group is 2; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, the terminal device determines that a frequency domain mask length corresponding to a port in the first antenna port index group is 4; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates the first value, the terminal device determines that a frequency domain mask length corresponding to a port in the first antenna port index group is 2; when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates the second value, the terminal device determines that the first antenna port index group includes a port with a frequency domain mask length of 2 and a port with a frequency domain mask length of 4.

According to the embodiment of the application, the terminal equipment can realize flexible switching of the frequency domain mask length according to the DMRS configuration information indicated by the DCI signaling.

With reference to the first aspect, in certain implementations of the first aspect, a plurality of antenna port index groups included in the antenna port index group set correspond to a plurality of indexes, and the antenna port indication information is used to indicate one of the plurality of indexes.

With reference to the first aspect, in certain implementations of the first aspect, a frequency domain mask length corresponding to a port in the first set of DMRS ports is 2, and a frequency domain mask length corresponding to a port in the second set of DMRS ports is 4.

In a second aspect, a communication method is provided, including:

the method comprises the steps that network equipment sends Radio Resource Control (RRC) signaling to terminal equipment, wherein the RRC signaling comprises a Time Domain Resource Allocation (TDRA) field, the TDRA field is used for configuring at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal (DMRS) configuration information, and the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information; the network device sends a Downlink Control Information (DCI) signaling to the terminal device, where the DCI signaling includes a first index, and the first index is used to indicate first time domain resource allocation information, where the first time domain resource allocation information is one of the at least one time domain resource allocation information.

According to the embodiment of the application, the network equipment can send DCI signaling to the terminal equipment for indicating the DMRS configuration information, so that the flexible scheduling of the DMRS configuration information of the DCI level is realized. On the basis, flexible switching of the R15DMRS port and the R18 DMRS port and/or flexible switching of the FD-OCC length can be realized.

With reference to the second aspect, in certain implementations of the second aspect, the first time domain resource allocation information corresponds to first DMRS configuration information; the first DMRS configuration information indicates a first value corresponding to any one of: the frequency domain mask length of the DMRS port is 2, and the protocol version is r15; or, the first DMRS configuration information indicates a second value, the second value corresponding to any one of: the frequency domain mask length of the DMRS port is 4, and the protocol version is r18.

With reference to the second aspect, in certain implementations of the second aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of the first type and the second type, and the DCI signaling further includes antenna port indication information.

With reference to the second aspect, in certain implementations of the second aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type, and a fourth DMRS type, and the DCI signaling further includes antenna port indication information.

In a third aspect, a communication apparatus is provided, which may be a terminal device, or an apparatus (e.g., a chip, or a system of chips, or a circuit) in the terminal device, or an apparatus capable of being used with the terminal device.

In a possible implementation, the communication apparatus may include a module or a unit corresponding to one or more of the methods/operations/steps/actions described in the first aspect, and the module or unit may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

In one possible implementation the communication device comprises: a transceiver unit and a processing unit connected with the transceiver unit.

A transceiver unit, configured to obtain at least one time domain resource allocation information and at least one demodulation reference signal DMRS configuration information, where the at least one time domain resource allocation information and the at least one DMRS configuration information correspond to each other; a transceiver unit, configured to receive a DCI signaling of downlink control information from the network device, where the DCI signaling includes a first index, and the first index is used to indicate first time domain resource allocation information, where the first time domain resource allocation information is one of the at least one time domain resource allocation information; and a processing unit, configured to determine, according to the DCI signaling, first DMRS configuration information from the at least one DMRS configuration information, where the first DMRS configuration information corresponds to the first time domain resource allocation information.

With reference to the third aspect, in certain implementation manners of the third aspect, the transceiver unit is configured to receive radio resource control, RRC, signaling from the network device, where the RRC signaling includes a time domain resource allocation, TDRA, field, and the TDRA field is used to configure the at least one time domain resource allocation information and the at least one DMRS configuration information.

With reference to the third aspect, in certain implementations of the third aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of the first type and the second type, and the DCI signaling further includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information and the first DMRS configuration information; (ii) a And the processing unit is used for determining a first antenna port index group from the antenna port index group set according to the antenna port indication information.

With reference to the third aspect, in certain implementations of the third aspect, when the DMRS type information indicates the first type and the first DMRS configuration information indicates a first value, corresponding to a first DMRS type; when the DMRS type information indicates the second type and the first DMRS configuration information indicates a first value, the DMRS type information corresponds to a second DMRS type; when the DMRS type information indicates the first type and the first DMRS configuration information indicates a second value, corresponding to a third DMRS type; and when the DMRS type information indicates the second type and the first DMRS configuration information indicates a second value, corresponding to a fourth DMRS type.

With reference to the third aspect, in certain implementations of the third aspect, when the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports; when the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second DMRS port set.

With reference to the third aspect, in certain implementations of the third aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type, and a fourth DMRS type, and the DCI signaling further includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information; a processing unit, configured to determine, according to the antenna port indication information, a first antenna port index group from the antenna port index group set; and the processing unit is used for determining the frequency domain mask length corresponding to the port in the first antenna port index group according to the first DMRS configuration information.

With reference to the third aspect, in certain implementations of the third aspect, when the DMRS type information indicates the first DMRS type or the second DMRS type, a port in the set of antenna port index groups belongs to a first set of DMRS ports; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

With reference to the third aspect, in certain implementation manners of the third aspect, when the first DMRS configuration information indicates a first value, the processing unit is configured to determine that a frequency domain mask length corresponding to a port in the first antenna port index group is 2; and when the first DMRS configuration information indicates the second value, a processing unit is configured to determine that a frequency domain mask length corresponding to a port in the first antenna port index group is 4.

With reference to the third aspect, in certain implementations of the third aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type, and a fourth DMRS type, and the DCI signaling further includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information and the first DMRS configuration information; and the processing unit is used for determining a first antenna port index group from the antenna port index group set according to the antenna port indication information.

With reference to the third aspect, in certain implementations of the third aspect, the set of antenna port index groups satisfies any one of:

With reference to the third aspect, in certain implementations of the third aspect, the plurality of antenna port candidate combinations satisfy any one of:

With reference to the third aspect, in certain implementations of the third aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type, and a fourth DMRS type, and the DCI signaling further includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information; a processing unit, configured to determine, according to the antenna port indication information, a first antenna port index group from the antenna port index group set; and the processing unit is used for determining the frequency domain mask length corresponding to the port in the first antenna port index group according to the DMRS type information and the first DMRS configuration information.

With reference to the third aspect, in some implementations of the third aspect, the set of antenna port index groups includes a second antenna port index group and a third antenna port index group, and a frequency domain mask length of a first port in the second antenna port index group is different from a frequency domain mask length of the first port in the third antenna port index group.

With reference to the third aspect, in certain implementations of the third aspect, the set of antenna port index groups includes a second port and a third port, the second port and the third port are in the same CDM group, the second port is a port in the first set of DMRS ports, and the third port is a port in the second set of DMRS ports.

With reference to the third aspect, in some implementation manners of the third aspect, the antenna port index group set includes a fourth antenna port index group, the fourth antenna port index group includes a fourth port and a fifth port, and a frequency domain mask length corresponding to the fourth port is different from a frequency domain mask length corresponding to the fifth port.

With reference to the third aspect, in certain implementations of the third aspect, when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the processing unit is configured to determine that a frequency-domain mask length corresponding to a port in the first antenna port index group is 2; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates the second value, a processing unit is configured to determine that a frequency domain mask length corresponding to a port in the first antenna port index group is 4; when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates the first value, a processing unit is configured to determine that a frequency domain mask length corresponding to a port in the first antenna port index group is 2; and when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates the second value, a processing unit is configured to determine that the first antenna port index group includes a port with a frequency-domain mask length of 2 and a port with a frequency-domain mask length of 4.

With reference to the third aspect, in certain implementations of the third aspect, a plurality of antenna port index groups included in the antenna port index group set correspond to a plurality of indexes, and the antenna port indication information is used to indicate one index of the plurality of indexes.

With reference to the third aspect, in certain implementations of the third aspect, a frequency domain mask length corresponding to a port in the first set of DMRS ports is 2, and a frequency domain mask length corresponding to a port in the second set of DMRS ports is 4.

In a fourth aspect, a communication apparatus is provided, which may be a network device, an apparatus (e.g., a chip or a system of chips or a circuit) in the network device, or an apparatus capable of being used with the network device.

In a possible implementation, the communication device may include a module or a unit corresponding to one or more of the methods/operations/steps/actions described in the second aspect, and the module or unit may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

A transceiver unit, configured to send a radio resource control RRC signaling to a terminal device, where the RRC signaling includes a time domain resource allocation TDRA field, where the TDRA field is used to configure at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal DMRS configuration information, and the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information; a transceiver unit, configured to send a DCI signaling for downlink control information to the terminal device, where the DCI signaling includes a first index, and the first index is used to indicate first time domain resource allocation information, where the first time domain resource allocation information is one of the at least one time domain resource allocation information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first time domain resource allocation information corresponds to first DMRS configuration information; the first DMRS configuration information indicates a first value corresponding to any one of: the frequency domain mask length of the DMRS port is 2, and the protocol version is r15; or, the first DMRS configuration information indicates a second value, the second value corresponding to any one of: the frequency domain mask length of the DMRS port is 4, and the protocol version is r18.

With reference to the fourth aspect, in some implementations of the fourth aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of the first type and the second type, and the DCI signaling further includes antenna port indication information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the RRC signaling further includes DMRS type information, where the DMRS type information indicates any one of the first DMRS type, the second DMRS type, the third DMRS type, and the fourth DMRS type, and the DCI signaling further includes antenna port indication information.

In a fifth aspect, a communication device is provided, which includes a communication interface for outputting and/or inputting signals, and a processor for executing a computer program or instructions stored in a memory, so that the communication device performs the method in any one of the possible implementations of the first aspect; or cause the communication device to perform the method of any of the possible implementations of the second aspect.

Alternatively, the memory may be included in the communication device, and as one way, the memory may be provided separately from the processor; alternatively, the memory may be located in the processor, integrated with the processor.

Optionally, the memory may also be coupled to the processor outside of the communication device.

A sixth aspect provides a computer-readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of any of the possible implementations of the first aspect or causes the computer to perform the method of any of the possible implementations of the second aspect.

In a seventh aspect, a chip or a system of chips is provided, where the chip or the system of chips includes a processing circuit and an input/output interface, and the processing circuit is configured to perform the method in any one of the possible implementations of the first aspect; alternatively, the processing circuitry is arranged to perform the method of any one of the possible implementations of the second aspect.

In an eighth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of any one of the possible implementations of the first aspect; alternatively, the computer is caused to perform the method of any one of the possible implementations of the second aspect.

In a ninth aspect, a communication system is provided that includes a terminal device and a network device. The terminal device is configured to perform the method of any one of the possible implementations of the first aspect. The network device is configured to perform the method of any one of the possible implementations of the second aspect.

Drawings

Fig. 1 shows a communication system to which the present application is applicable.

Fig. 2 is a schematic interaction diagram of an example of the method proposed in the present application.

Fig. 3 is a schematic interaction diagram of an example of the method proposed in the present application.

Fig. 4 is a schematic interaction diagram of an example of the method proposed in the present application.

Fig. 5 is a schematic interaction diagram of an example of the method proposed in the present application.

Fig. 6 is a schematic interaction diagram of an example of the method proposed in the present application.

Fig. 7 is a schematic block diagram of a communication device provided herein.

Fig. 8 is a schematic block diagram of a communication device provided herein.

Detailed Description

For ease of understanding, some technical contents related to the present application will be explained first.

(1) Terminal device

A terminal device may be any type of device that provides voice and/or data connectivity to a user, and may also be referred to as a terminal, a User Equipment (UE), a mobile station, a mobile terminal, and so on. The terminal can be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-electrical (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wearing, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet personal computer, a computer with a wireless transceiving function, wearable equipment, aerospace equipment and the like. In the embodiments of the present application, a chip applied to the above-described apparatus may also be referred to as a terminal.

(2) Network device

The network device in this embodiment may be an access network device such as a base station, where the base station may be a Base Transceiver Station (BTS) in a global system for mobile communication (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved node b (eNB or eNodeB) in a long term evolution (long term evolution, LTE) system, may also be a next generation base station (neighbor nodeB, gNB) in a fifth generation (5 th generation,5 g) mobile communication system, a next generation base station in a sixth generation (6 generation,6 g) mobile communication system, or may also be a base station in a future mobile communication system. The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. For example, the network device may also be a module or a unit that performs part of the functions of the base station, and for example, the network device may be a Centralized Unit (CU) or a Distributed Unit (DU). The CU and the DU perform a part of the protocol stack function of the base station, respectively. Furthermore, the functions of the CU may be implemented by multiple entities, for example, separating the functions of a Control Plane (CP) and a User Plane (UP) of the CU to form a CU control plane (CU-CP) and a CU user plane (CU-UP). For example, CU-CP and CU-UP may be implemented by different functional entities and connected via an E1 interface, and may be coupled to DUs.

(3) Demodulation reference signal (DMRS)

DMRS is used to estimate an equivalent channel matrix of a data channel or a control channel, thereby being used for detection and demodulation of data. Illustratively, the data channel may be a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH). Illustratively, the control channel may be a (physical downlink control channel, PDCCH).

Taking the data channel PDSCH as an example, the DMRS is usually precoded the same as the transmitted data signal, so as to ensure that the DMRS and the data experience the same equivalent channel.

In order to reduce mutual interference between DMRS resources corresponding to multiple DMRS ports, resource mapping may be performed in a frequency division multiplexing, time division multiplexing, or code division multiplexing manner. 2 DMRS resource mapping types (denoted as type1 and type2, respectively) are supported in R15. For a Type1 (Type 1) DMRS, a maximum of 8 orthogonal DMRS ports may be supported; for Type2 (Type 2) DMRS, a maximum of 12 orthogonal DMRS ports may be supported.

In general, one DMRS port corresponds to one transmission stream. For example, for multiple-input-multiple-output (MIMO) transmission with a number of transmission streams R, the number of DMRS ports is R.

(4) Code Division Multiplexing (CDM) group

The network device may divide the DMRS ports into multiple CDM groups. The time frequency resources occupied by the DMRS ports in the same CDM group are the same.

Taking type 1DMRS as an example: for a single symbol DMRS, a maximum of 4 DMRS ports are supported in R15, and DMRS resources occupy one OFDM symbol. The 4 DMRS ports are divided into 2 code division multiplexing groups (CDM groups), where CDM group 0 includes port 0 and port 1; CDM group 1 contains port 2 and port 3.CDM group 0 and CDM group 1 are frequency division multiplexed. The DMRS ports contained within a CDM group are mapped on the same time-frequency resource. DMRSs corresponding to DMRS ports included in a CDM group are distinguished by orthogonal code (OCC), so that orthogonality of the DMRS ports in the CDM group is ensured. Specifically, port 0 and port 1 are located in the same Resource Element (RE), and resource mapping is performed in the frequency domain in a comb-like manner, that is, one subcarrier is spaced between adjacent frequency domain resources occupied by port 0 and port 1. For one DMRS port, the occupied adjacent 2 REs correspond to one OCC codeword sequence with a length of 2. For example, a set of length-2 OCC codeword sequences (+ 1+1 and + 1-1) are used for subcarrier 0 and subcarrier 2, port 0 and port 1. Similarly, port 2 and port 3 are located within the same Resource Element (RE), mapped in the frequency domain in a comb-like fashion on unoccupied REs of port 0 and port 1. For sub-carrier 1 and sub-carrier 3, port 2 and port 3, a set of length 2 OCC codeword sequences (+ 1+1 and + 1-1) are used.

(5)OCC

OCCs can be divided into two categories: frequency domain OCC (denoted as FD-OCC) and time domain OCC (denoted as TD-OCC).

Accordingly, the length of OCC can also be divided into two categories, namely, the length of FD-OCC and the length of TD-OCC.

(6) DMRS port number expansion (extension)

In R15, two DMRS resource mapping types are defined, type1 (type 1) and type2 (type 2), respectively. The upper limit of the number of the DMRS ports corresponding to type1 is 8, and the upper limit of the number of the DMRS ports corresponding to type2 is 12. A maximum of 12 orthogonal DMRS ports can be supported. In addition, in R15, the FD-OCC length of the DMRS port is 2.

In R18, as one mode, type1 may be enhanced, and the upper limit of the number of DMRS ports corresponding to type1 after enhancement is 16; as another mode, type2 may be enhanced, and the upper limit of the number of DMRS ports corresponding to type2 after enhancement is 24. Further, in R18, the FD-OCC length of the DMRS port may be 4.

Illustratively, type1 after enhancement can be denoted as type1-E, or type 1-R18, or type 3; type2 can be referred to as type2-E, or type 2-R18, or type 4 after enhancement. It should be understood that the names of type1 and type2 after enhancement are not limited by this application.

That is, the full set of configuration types corresponding to the R18 DMRS port high-layer signaling may be: type1, type2, type1-E, type-E.

(7) First and second sets of DMRS ports

In this application, the first DMRS port set may be understood as an R15 port set. The second set of DMRS ports may be understood as a set of R18 ports. That is, only the ports defined in R15 may be included in the first set of DMRS ports. The second DMRS port set may include ports defined in R15 or ports newly added in R18.

The length of the FD-OCC corresponding to a port in the first DMRS port set may be 2. The FD-OCC length corresponding to a port in the second set of DMRS ports may be 4.

Furthermore, the upper limit values of the number of ports included in the first set of DMRS ports and the second set of DMRS ports may not be the same for the different resource mapping types described above.

For example, for type1 single symbols, the upper limit value of the number of ports included in the first set of DMRS ports may be 4; for type1 bi-symbols, the upper limit value of the number of ports included in the first set of DMRS ports may be 8. For type2 single symbols, the upper limit value of the number of ports included in the first set of DMRS ports may be 6; for type2 bi-symbols, the upper limit value of the number of ports included in the first set of DMRS ports may be 12.

For another example, for a type 3 single symbol, the upper limit value of the number of ports included in the second set of DMRS ports may be 8; for type 3 bi-symbols, the upper limit value of the number of ports included in the second set of DMRS ports may be 16. For type 4 single symbols, the upper limit value of the number of ports included in the second set of DMRS ports may be 12; for type 4 bi-symbols, the upper limit value of the number of ports included in the second set of DMRS ports may be 24.

(8) Method for terminal equipment to acquire information of DMRS (demodulation reference signal) port allocated to terminal equipment by network equipment

And in the data transmission process, the network equipment informs the terminal equipment of the corresponding allocated DMRS port. And the terminal equipment receives the pilot signal and performs a corresponding channel estimation process at a corresponding resource position based on the allocated DMRS port according to a DMRS symbol generation method and a time-frequency resource mapping rule defined by a protocol.

The DMRS ports referred to in this application are mainly used for uplink and downlink data signal (PUSCH and PDSCH) transmission, and for such DMRS reference signals configured for data transmission, its high-layer signaling configuration is located in PDSCH configuration (PDSCH-config) or PUSCH configuration (PUSCH-config). Next, a method for notifying the terminal device of the DMRS port allocated to the network device by using PDSCH-config as an example will be described. Specifically, the following 3 steps may be included.

Step 1: the network device sends PDSCH-config signaling to the terminal device.

One possible data structure for PDSCH-config signaling is defined in the existing standard, as follows (the content not referred to in this application is replaced by "… …"):

PDSCH-Config::＝SEQUENCE{

……

dmrs-DownlinkForPDSCH-MappingTypeA SetupRelease{DMRS-DownlinkConfig}OPTIONAL,

dmrs-DownlinkForPDSCH-MappingTypeB SetupRelease{DMRS-DownlinkConfig}OPTIONAL,

……

pdsch-TimeDomainAllocationList SetupRelease{PDSCH-TimeDomainResourceAllocationList}

OPTIONAL，

……

}

one possible data structure of a DMRS downlink configuration (DMRS-DownlinkConfig) field included in the PDSCH-config signaling is as follows:

DMRS-DownlinkConfig-r18::＝SEQUENCE{

dmrs-Type ENUMERATED{type2}OPTIONAL,

……

maxLength ENUMERATED{len2}OPTIONAL,

……

}

it should be understood that a DMRS Type (DMRS-Type) is used to indicate one of Type1 and Type 2. The maximum length (maxLength) is used to indicate one of a single symbol and a double symbol.

One possible data structure of a PDSCH time domain resource allocation list (PDSCH-timedomain resource allocation list) field in the PDSCH-config signaling is as follows:

PDSCH-TimeDomainResourceAllocationList::＝SEQUENCE(SIZE(1..maxNrofDL-Allocations))OF PDSCH-TimeDomainResourceAllocation

PDSCH-TimeDomainResourceAllocation::＝SEQUENCE{

k0 INTEGER(0..32)OPTIONAL,

mappingType ENUMERATED{typeA,typeB},

startSymbolAndLength INTEGER(0..127)

}

it should be understood that k0 is used to indicate a starting slot (slot) offset, mappingType is used to indicate a mapping type, and startsymbol and length are used to indicate a starting symbol and length.

For example, the content indicated by the Time Domain Resource Allocation (TDRA) list field can be seen in table 1:

TABLE 1

Index	K ₀	Mapping type	SLIV
				1	1	Type A	66
2	1	Type A	27
				3	2	Type B	101
…	…	…	…

Taking a Row index value as 1 as an example, taking a k0 value as 1 to indicate that 1 slot is formed between the PDSCH and the scheduling PDCCH, wherein the mapping type value corresponds to the PDSCH configuration type of TypeA, and a value corresponding to a Start and Length Indicator (SLIV) indicates the initial sending symbol and the continuous coincidence number of the PDSCH in the transmission slot.

Further, when the PDSCH-config signaling does not include the PDSCH-timedomainnalockationlist field, a plurality of time domain resource allocation information may be configured in the terminal device in advance. Illustratively, a plurality of time domain resource allocation information configured in the terminal device in advance may be as shown in table 2 below.

TABLE 2

Index	Mapping type	K ₂	S	L
					1	Type A	j	0	14
2	Type A	j	0	12
					…	…	…	…	…

And 2, step:

and the network equipment sends the DCI signaling to the terminal equipment. The DCI signaling includes an Antenna port (Antenna port) field and a TDRA field. Wherein, the Antenna port field includes an index for indicating the DMRS port allocated by the network device. An index is included in the TDRA field and is used to indicate a time domain resource allocation information, for example, the index is a certain index in table 1 or a certain index in table 2.

And step 3:

and the terminal equipment determines the DMRS port allocated by the network equipment according to the received PDSCH-config signaling and the DCI signaling.

It should be understood that for different values of DMRS-Type and maxLength, different DMRS port tables may be defined. The terminal device can determine the DMRS ports allocated by the network device from the corresponding DMRS port table according to the DCI signaling.

For example, for type1 single symbol, the corresponding DMRS port table may be as shown in table 3 below, and the index included in the Antenna port field in the DCI signaling may be a certain index in table 3.

TABLE 3

(9) Antenna port index set and antenna port index set

Taking table 3 as an example, the "DMRS port" corresponding to each row in table 3 may be referred to as an "antenna port index group", and all the "antenna port index groups" in table 3 may be referred to as an "antenna port index group set". In the embodiment of the present application, one "antenna port index group set" corresponds to one "DMRS port table". In other words, one "antenna port index group set" corresponds to one "antenna port table".

The technical problem addressed by the present application is explained below.

As described above, in R18, the R18 terminal device can use the R15 port and the R18 port. Therefore, how to flexibly schedule the two DMRS ports is an urgent problem to be solved. In addition, the length of the FD-OCC corresponding to the DMRS port in R15 is 2, and the length of the FD-OCC corresponding to the DMRS port in R18 may be 4, so how to flexibly schedule the length of the FD-OCC of the DMRS port is also a problem to be solved.

In view of the above technical problem, as shown in fig. 2, the present application provides a method 200, specifically, the method 200 includes:

s201, the terminal equipment acquires at least one time domain resource allocation message and at least one DMRS configuration message.

And the at least one time domain resource allocation message corresponds to the at least one DMRS configuration message. For example, the at least one time domain resource allocation information and the at least one DMRS configuration information are in a one-to-one correspondence relationship, or a many-to-one correspondence relationship, which is not limited in this application.

The value of each DMRS configuration information in the at least one DMRS configuration information may be a first value or a second value.

The first value is used for indicating R15, or indicating that the upper limit value of the number of the DMRS ports is 8, or indicating that the upper limit value of the number of the DMRS ports is 12, or indicating that the DMRS type is not enhanced, or indicating that the frequency domain mask length corresponding to the DMRS ports is 2.

The second value is used for indicating R18, or for indicating that the upper limit value of the number of the DMRS ports is 16, or for indicating that the upper limit value of the number of the DMRS ports is 24, or for indicating that the DMRS type is enhanced, or for indicating that the frequency domain mask length corresponding to the DMRS ports is 4.

The following describes a manner for a terminal device to obtain at least one time domain resource allocation information and at least one DMRS configuration information:

mode 1:

the network device transmits Radio Resource Control (RRC) signaling to the terminal device. Accordingly, the terminal device receives the RRC signaling.

For example, the RRC signaling in the present application may be PDSCH-config signaling or PUSCH-config signaling. In this regard, no further description is provided below.

The RRC signaling includes a TDRA field (which may correspond to, for example, the above pdsch-timedomainallactosionlist). The TDRA field is used for configuring at least one time domain resource allocation information and the at least one DMRS configuration information.

Wherein each of the at least one time domain resource allocation information may include a mapping type (mappingType) parameter and a starting symbol and length (startsymbol and length) parameter as described above, and optionally may further include a "k0" parameter as described above.

Optionally, as a manner, an indication field may be added to the TDRA field, where the added indication field is used to configure at least one DMRS configuration information.

Illustratively, after an indication field is newly added in the TDRA field, the contents indicated by the TDRA field may be as shown in table 4 below.

TABLE 4

Index	K ₀	Mapping type	SLIV	DMRS configuration information
					1	1	Type A	66	First value
2	1	Type A	27	Second value
					3	2	Type B	101	First value
…	…	…	…

Optionally, as another way, the at least one DMRS configuration information may be configured through one or more existing indication fields in a TDRA field. For example, the at least one DMRS configuration information may be implicitly configured through a "k0" parameter, or may be implicitly configured through a "k0" parameter and a "SLIV" parameter.

Optionally, a TDRA field included in RRC signaling may be used to configure the at least one time domain resource allocation information, and other fields in the RRC signaling besides the TDRA field may be used to configure the at least one DMRS configuration information. At this time, the at least one time domain resource allocation information and the at least one DMRS configuration information may have a correspondence relationship by default.

Mode 2:

at least one time domain resource allocation information and at least one DMRS configuration information are preconfigured in a protocol. The terminal device may obtain at least one time domain resource allocation information and at least one DMRS configuration information according to a supported protocol.

Illustratively, the at least one time domain resource allocation information and the at least one DMRS configuration information preconfigured in the protocol may be as shown in table 5 below.

TABLE 5

Index	mapping type	K ₂	S	L	DMRS configuration information
						1	Type A	j	0	14	First value
2	Type A	j	0	12	Second value
						…	…	…	…	…	…

S202, the network equipment sends DCI signaling to the terminal equipment. Accordingly, the terminal device receives DCI signaling from the network device.

The DCI includes a first index indicating first time domain resource allocation information. The first time domain resource allocation information is one of the at least one time domain resource allocation information.

Exemplarily, the TDRA field in the DCI signaling may include the first index.

The DCI also includes Antenna port indication information (corresponding to an Antenna port (Antenna port) field in the foregoing), where the Antenna port indication information is used to indicate a DMRS port allocated to the terminal device by the network device.

Specifically, the network device may determine the time domain resources allocated to the terminal device and indicate the time domain resources to the terminal device through the TDRA field in the DCI signaling.

The network equipment can also determine the number of the DMRS ports and the DMRS port number allocated to the terminal equipment, and indicate the DMRS ports allocated to the terminal equipment through an Antenna port field in DCI signaling.

It should be understood that, in this embodiment of the present application, the network device may further determine DMRS configuration information corresponding to the data transmission process, and exemplarily, indicate the DMRS configuration information to the terminal device through a TDRA field in DCI signaling.

That is to say, in the embodiment of the present application, the index included in the TDRA domain in the DCI signaling may be used to indicate DMRS configuration information in addition to the time domain resource allocation information.

For example, if the network device determines that DMRS configuration information corresponding to a certain data transmission process is first DMRS configuration information, the network device generates DCI signaling #1, where the DCI signaling #1 includes a first index, and the first index indicates the first DMRS configuration information. After that, the network device determines that the DMRS configuration information corresponding to the next data transmission process is the second DMRS configuration information, and then the network device generates DCI signaling #2, where the DCI signaling #2 includes the second index, and the second index indicates the second DMRS configuration information.

That is, according to the embodiment of the present application, scheduling of DMRS configuration information at a DCI level may be achieved.

And S203, the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

For example, if the terminal device acquires the at least one DMRS configuration information in the manner 1 in S201, the terminal device may determine the first DMRS configuration information according to the first index in the DCI signaling. Taking table 4 as an example, when the value of the first index is "1", the first DMRS configuration information corresponds to the first value.

Exemplarily, if the terminal device acquires the at least one DMRS configuration information in the manner 2 in S201, the terminal device may determine the first DMRS configuration information according to the first index in the DCI signaling. Taking table 5 as an example, when the value of the first index is "2", the first DMRS configuration information corresponds to a second value.

According to the embodiment of the application, the network equipment can indicate different DMRS configuration information to the terminal equipment through different DCI signaling, so that the flexible scheduling of the DMRS configuration information at the DCI level is realized. On the basis, flexible scheduling of the R15DMRS port and the R18 DMRS port and/or flexible scheduling of the FD-OCC length can be realized.

The method 200 is described in detail below in conjunction with the method 300. In this method 300, the DMRS type is jointly indicated by DMRS type information and DMRS configuration information, and the network device may send different DCI signaling to implement the handover of the R15 port and the R18 port. As shown in fig. 3, the method 300 specifically includes:

s301, the network device sends RRC signaling to the terminal device. Accordingly, the terminal device receives the RRC signaling.

The RRC signaling includes DMRS type information, and optionally, the RRC signaling may further include a TDRA field.

Illustratively, the DMRS Type information may correspond to DMRS-Type in the DMRS-DownlinkConfig field above.

Wherein the DMRS type information indicates any one of a first type (corresponding to type1 above) and a second type (corresponding to type2 above).

The TDRA field is used for configuring at least one time domain resource allocation message and at least one DMRS configuration message, and the at least one time domain resource allocation message and the at least one DMRS configuration message correspond to each other. The specific configuration may be referred to as mode 1 in S201.

Optionally, as another mode, if the RRC signaling does not include the TDRA field, at this time, the terminal device may obtain at least one time domain resource allocation information and at least one DMRS configuration information according to mode 2 in S201.

S302, the network device sends DCI signaling to the terminal device. Accordingly, the terminal device receives DCI signaling from the network device.

The DCI includes a first index, where the first index is used to indicate first time domain resource allocation information. The first time domain resource allocation information is one of the at least one time domain resource allocation information. Illustratively, the first index may be carried in a TDRA field in DCI signaling.

The DCI also includes Antenna port indication information (corresponding to the Antenna port field in the above) for indicating the DMRS port allocated to the terminal device by the network device.

S303, the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

Reference may be made to S203 with respect to this process.

S304, the terminal equipment determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information.

Specifically, the terminal device determines an antenna port table (or referred to as DMRS port table) according to the DMRS type information, the first DMRS configuration information, and the maxLength parameter, where the antenna port table includes a plurality of antenna port index groups and a corresponding relationship between the plurality of indexes.

Case 1:

when the DMRS type information indicates the first type and the first DMRS configuration information indicates the first value, the antenna port table determined by the terminal device may refer to an existing protocol corresponding to the first DMRS type. The ports in the set of antenna port index groups belong to a first set of DMRS ports. The frequency domain mask length corresponding to a port in the first set of DMRS ports is 2. The upper limit value of the number of ports in the first DMRS port set is 8.

Case 2:

when the DMRS type information indicates the second type and the first DMRS configuration information indicates the first value, the antenna port table determined by the terminal device may refer to an existing protocol corresponding to the second DMRS type. The ports in the set of antenna port index groups belong to a first set of DMRS ports. The frequency domain mask length corresponding to a port in the first set of DMRS ports is 2. The upper limit value of the number of ports in the first DMRS port set is 12.

Case 3:

when the DMRS type information indicates the first type and the first DMRS configuration information indicates the second value, corresponding to a third DMRS type (i.e., type1-E above), the antenna port table determined by the terminal device is as shown in table D1 (corresponding to a single symbol) or table D2 (corresponding to a double symbol) in method 600 described below. The ports in the set of antenna port index groups belong to a second set of DMRS ports. The frequency domain mask length corresponding to a port in the second set of DMRS ports is 4.

Case 4:

when the DMRS type information indicates the second type and the first DMRS configuration information indicates the second value, corresponding to a fourth DMRS type (i.e., type2-E above), the terminal device determines an antenna port table as shown in table D3 (corresponding to a single symbol), table D4-1 (corresponding to a double symbol), or table D4-2 (corresponding to a double symbol) in method 600 described below. The ports in the set of antenna port index groups belong to a second set of DMRS ports. The frequency domain mask length corresponding to a port in the second set of DMRS ports is 4.

S305, the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

As can be seen from S304, the plurality of antenna port index sets included in the antenna port index set correspond to a plurality of indexes. The antenna port indication information is used for indicating one of the plurality of indexes. The terminal device may determine a first antenna port index group from the plurality of antenna port index groups according to the index.

Optionally, the terminal device may also determine the Number of CDM groups (i.e., number of DMRS CDM groups(s) with out data) on which no data is transmitted on the symbol on which the DMRS is located.

According to the method 300 of the embodiment of the present application, the network device may respectively indicate different DMRS configuration information by sending a plurality of DCI signaling, thereby implementing a handover between an R15 port and an R18 port.

For example, when the network device determines that the total flow number of multi-user multiple input multiple output (MU-MIMO) is less than or equal to the maximum flow number (12 flows) supported by the R15DMRS port, the network device sends DCI signaling to the terminal device, and the terminal device determines first DMRS configuration information according to the DIC signaling, where the first DMRS configuration information is a first value, so as to support the R18 terminal device to fallback to using the R15 port.

For another example, when the network device determines that the total number of streams of the MU-MIMO is greater than the maximum number of streams (12 streams) supported by the R15DMRS port, the network device sends DCI signaling to the terminal device, the terminal device determines the first DMRS configuration information according to the DIC signaling, and the first DMRS configuration information is the second value, so that the R18 terminal device is supported to use the R18 port, and the MU-MIMO space division multiplexing capability is improved, so as to improve the total spectrum efficiency.

The method 200 is described in detail below in conjunction with the method 400. In the method 400, the DMRS type is indicated by DMRS type information configured by RRC signaling, and the network device may send different DCI signaling to implement a handover between 2 long FD-OCC and 4 long FD-OCC. As shown in fig. 4, the method 400 specifically includes:

s401, the network device sends RRC signaling to the terminal device. Accordingly, the terminal device receives the RRC signaling.

The RRC signaling includes DMRS type information, and optionally, a TDRA field.

Wherein the DMRS type information indicates any one of a first DMRS type (corresponding to type1 above), a second DMRS type (corresponding to type2 above), a third DMRS type (corresponding to type1-E above), and a fourth DMRS type (corresponding to type2-E above).

The TDRA field is used for configuring at least one time domain resource allocation message and at least one DMRS configuration message, and the at least one time domain resource allocation message corresponds to the at least one DMRS configuration message. The specific configuration may be referred to as mode 1 in S201.

Optionally, as another mode, the RRC signaling does not include the TDRA field, and in this case, the terminal device may obtain the at least one time domain resource allocation information and the at least one DMRS configuration information according to mode 2 in S201.

S402, the network equipment sends DCI signaling to the terminal equipment. Accordingly, the terminal device receives DCI signaling from the network device.

The DCI includes a first index indicating first time domain resource allocation information. The first time domain resource allocation information is one of the at least one time domain resource allocation information. Illustratively, the first index may be carried in a TDRA field in DCI signaling.

S403, the terminal device determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

Reference may be made to S203 with respect to this process.

S404, the terminal equipment determines an antenna port index group set according to the DMRS type information.

Specifically, the terminal device determines an antenna port table (or referred to as DMRS port table) according to the DMRS type information and the maxLength parameter, where the antenna port table includes a plurality of antenna port index groups and a corresponding relationship between the plurality of indexes.

The following description will be made in each case.

Case 1:

when the DMRS type information indicates the first DMRS type, the antenna port table determined by the terminal device may refer to an existing protocol.

Case 2:

when the DMRS type information indicates the second DMRS type, the antenna port table determined by the terminal device may refer to an existing protocol.

Case 3:

when the DMRS type information indicates the third DMRS type, the antenna port table determined by the terminal device is as shown in table D1 (corresponding to a single symbol) or table D2 (corresponding to a double symbol) in the method 600 described below.

Case 4:

when the DMRS type information indicates the fourth DMRS type, the antenna port table determined by the terminal device is as shown in table D3 (corresponding to a single symbol), table D4-1 (corresponding to a double symbol), or table D4-2 (corresponding to a double symbol) in method 600 described below.

S405, the terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

As can be seen from S404, the plurality of antenna port index groups included in the antenna port index group set correspond to a plurality of indexes. The antenna port indication information is used to indicate one of the plurality of indexes. The terminal device may determine a first antenna port index group from the plurality of antenna port index groups according to the index.

Optionally, the terminal device may also determine the number of CDM groups in which no data is transmitted on the symbol on which the DMRS is located.

S406, the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the first DMRS configuration information.

Case a:

when the first DMRS configuration information indicates the first value, the terminal device determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 2.

Illustratively, if the first antenna port index group is determined from the table corresponding to case 3 or case 4 of S404, although the ports in the first antenna port index group belong to R18 ports and the length of the FD-OCC is 4, the ports in the first antenna port index group may be backed off from 4 long FD-OCC to 2 long FD-OCC in this case a.

Case B:

and when the first DMRS configuration information indicates the second value, the terminal equipment determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 4.

Illustratively, if the first antenna port index group is determined from the table corresponding to case 1 or case 2 of S404, although the ports in the first antenna port index group belong to R15 ports and the length of the FD-OCC is 2, the ports in the first antenna port index group may be extended from 2-long FD-OCC to 4-long FD-OCC in this case B.

According to the method 400 of the embodiment of the present application, the network device may respectively indicate different DMRS configuration information by sending multiple DCI signaling, thereby implementing the handover between the 2-long FD-OCC and the 4-long FD-OCC.

The method 200 is described in detail below with reference to the method 500. In the method 500, the DMRS port tables may be jointly indicated by DMRS type information and DMRS configuration information, and the network device may send different DCI signaling to implement switching between different DMRS port tables, and then implement switching between an R15 port and an R18 port, and/or switching between a 2-long FD-OCC and a 4-long FD-OCC. As shown in fig. 5, the method 500 specifically includes:

s501, the network device sends RRC signaling to the terminal device. Accordingly, the terminal device receives the RRC signaling.

The process is the same as S401, and reference may be specifically made to the description in S401.

S502, the network equipment sends DCI signaling to the terminal equipment. Accordingly, the terminal device receives DCI signaling from the network device.

The process is the same as S402, and specific reference may be made to the description in S402.

S503, the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

Reference may be made to S203 with respect to this process.

And S504, the terminal equipment determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information.

Specifically, the terminal device determines an antenna port table (or referred to as a DMRS port table) according to DMRS type information, first DMRS configuration information, and a "maxLength" parameter, where the antenna port table includes a plurality of antenna port index groups and a correspondence between the plurality of indexes.

S504 will be explained in each case.

Case 1:

the DMRS type information indicates a first DMRS type (type 1) or a third DMRS type (type 1-E), and is a single symbol.

Case 1 can be divided into two implementations, which are described below.

The first implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A1, table B1, and table C1 below.

It should be understood that in R15, type1 single symbol corresponds to 4R 15 ports. In R18, enhancing the type1 single symbol can result in 8R 18 ports. The first 4 ports of the 8R 18 ports are included in table A1, and the length of the FD-OCC corresponding to the port is 4. The 8R 18 ports are included in table B1, and the length of the FD-OCC corresponding to the port is 4. The 4R 15 ports are included in table C1.

Table A1 (both R15): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a first value, single symbol. The antenna port index set corresponding to table A1 may be denoted as a first antenna port index set #1.

Table B1 (both R18): the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a second value and is a single symbol. The antenna port index set corresponding to table B1 can be denoted as a second antenna port index set #1.

Table C1 (one R15, one R18): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a second value and is a single symbol. Or, the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a first value and is a single symbol. The antenna port index set corresponding to the table C1 may be denoted as a third antenna port index set #1.

The second implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A2, table B2, and table C2 below.

It should be understood that in R15, type1 single symbol corresponds to 4R 15 ports. In R18, enhancing the type1 single symbol can result in 8R 18 ports. The 4R 15 ports are included in table A2, and the length of the FD-OCC corresponding to the port is 2. The last 4R 18 ports (i.e., extended ports) of the 8R 18 ports are included in table B2, and the length of the FD-OCC corresponding to the ports is 4. The 8R 18 ports are included in table C2.

Table A2 (both R15): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a first value, single symbol. The antenna port index set corresponding to table A2 may be denoted as a first antenna port index set #2.

Table B2 (both R18): the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a second value and is a single symbol. The antenna port index set corresponding to table B2 can be denoted as a second antenna port index set #2.

Table C2 (one R15, one R18): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a second value and is a single symbol. Or the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a first value and is a single symbol. The antenna port index set corresponding to the table C2 can be denoted as a third antenna port index set #2.

Case 2:

the DMRS type information indicates a first DMRS type (type 1) or a third DMRS type (type 1-E), and is bi-symbol.

Case 2 can be divided into two implementations, which are described below.

The first implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A3, table B3, and table C3 below.

It should be understood that in R15, type1 bi-symbols correspond to 8R 15 ports. In R18, enhancing type1 dual symbols can result in 16R 18 ports. The first 8 ports (i.e., ports before expansion) of the 16R 18 ports are included in table A3, and the length of the FD-OCC corresponding to the ports is 4. The 16R 18 ports are included in table B3, and the length of the FD-OCC corresponding to the port is 4. The 8R 15 ports are included in table C3, and the length of the FD-OCC corresponding to the port is 2.

Table A3 (both R15): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a first value, dual-symbol. The antenna port index set corresponding to table A3 may be denoted as a first antenna port index set #3.

Table B3 (both R18): the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a second value, bi-symbol. The antenna port index set corresponding to table B3 can be denoted as a second antenna port index set #3.

Table C3 (one R15, one R18): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a second value, a dual symbol. Or, the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a first value, dual-symbol. The antenna port index set corresponding to the table C3 can be denoted as a third antenna port index set #3.

The second implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A4, table B4, and table C4 below.

It should be understood that in R15, type1 bi-symbols correspond to 8R 15 ports. In R18, enhancing type1 bi-symbols may result in 16R 18 ports. The 8R 15 ports are included in table A4, and the length of the FD-OCC corresponding to the port is 2. The last 8R 18 ports (i.e., extended ports) of the 16R 18 ports are included in table B4, and the length of the FD-OCC corresponding to the ports is 4. The 16R 18 ports are included in table C4, and the length of the FD-OCC corresponding to the port is 4.

Table A4 (both R15): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a first value, dual-symbol. The antenna port index group set corresponding to table A4 may be denoted as a first antenna port index group set #4.

Table B4 (both R18): the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a second value, bi-symbol. The antenna port index set corresponding to table B4 can be denoted as a second antenna port index set #4.

Table C4 (one R15, one R18): the DMRS type information indicates a first DMRS type, and the first DMRS configuration information indicates a second value, bi-symbol. Or, the DMRS type information indicates a third DMRS type, and the first DMRS configuration information indicates a first value, dual-symbol. The antenna port index set corresponding to the table C4 can be denoted as a third antenna port index set #4.

Case 3:

the DMRS type information indicates a second DMRS type or a fourth DMRS type, and is a single symbol.

Case 3 can be divided into two implementations, which are described below.

The first implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A5, table B5, and table C5 below.

It should be understood that in R15, type2 single symbols correspond to 6R 15 ports. In R18, enhancing the type2 single symbol can result in 12R 18 ports. The first 6 ports (i.e., ports before expansion) of the 12R 18 ports are included in table A5, and the length of the FD-OCC corresponding to the ports is 4. The 12R 18 ports are included in table B5, and the length of the FD-OCC corresponding to the port is 4. The 6R 15 ports are included in table C5, and the length of the FD-OCC corresponding to the ports is 2.

Table A5 (both R15): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a first value, single symbol. The antenna port index set corresponding to table A5 may be denoted as a first antenna port index set #5.

Table B5 (both R18): the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a second value, a single symbol. The antenna port index set corresponding to table B5 can be denoted as a second antenna port index set #5.

Table C5 (one R15, one R18): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a second value and a single symbol; or, the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a first value, a single symbol. The antenna port index set corresponding to the table C5 can be denoted as a third antenna port index set #5.

The second implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A6, table B6, and table C6 below.

It should be understood that in R15, type2 single symbols correspond to 6R 15 ports. In R18, enhancing the type2 single symbol can result in 12R 18 ports. The 6R 15 ports are included in table A6, and the length of FD-OCC corresponding to the ports is 2. The last 6R 18 ports (i.e., extended ports) of the 12R 18 ports are included in table B6, and the length of the FD-OCC corresponding to the ports is 4. The 12R 18 ports are included in table C6.

Table A6 (both R15): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a first value, single symbol. The antenna port index set corresponding to table A6 may be denoted as a first antenna port index set #6.

Table B6 (both R18): the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a second value, a single symbol. The antenna port index set corresponding to table B6 can be denoted as a second antenna port index set #6.

Table C6 (one R15, one R18): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a second value and a single symbol; or, the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a first value, a single symbol. The antenna port index set corresponding to the table C6 can be denoted as a third antenna port index set #6.

Case 4:

the DMRS type information indicates a second DMRS type (type 2) or a fourth DMRS type (type 2-E), and is bi-symbol.

Case 4 can be divided into two implementations, which are described below.

The first implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A7, table B7, and table C7 below.

It should be understood that in R15, type2 dual symbols correspond to 12R 15 ports. In R18, enhancing type2 dual symbols can result in 24R 18 ports. The first 12 ports of the 24R 18 ports are included in table A7, and the length of the FD-OCC corresponding to the port is 4. The 24R 18 ports are included in table B7, and the FD-OCC length for the port is 4. The 12R 15 ports are included in table C7.

Table A7 (both R15): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a first value, dual symbols. The antenna port index group set corresponding to table A7 may be denoted as a first antenna port index group set #7.

Tables B7-1 and B7-2 (both R18): the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a second value, bi-symbol. The antenna port index set corresponding to table B7-1 can be referred to as a second antenna port index set #7. The antenna port index set corresponding to the table B7-2 can be referred to as a second antenna port index set #8.

Table B7-1:

TABLE B7-2

Table C7 (one R15, one R18): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a second value and a dual symbol; or, the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a first value, dual-symbol. The antenna port index set corresponding to the table C7 may be denoted as a third antenna port index set #7.

The second implementation mode comprises the following steps: the antenna port table determined by the terminal device may be one of table A8, table B8, and table C8, described below.

It should be understood that in R15, type2 dual symbols correspond to 12R 15 ports. In R18, enhancing type2 dual symbols can result in 24R 18 ports. The 12R 15 ports are included in table A8, and the length of the FD-OCC corresponding to the port is 2. The last 12R 18 ports (i.e., extended ports) of the 24R 18 ports are included in table B8, and the length of the FD-OCC corresponding to the ports is 4. The 24R 18 ports are included in table C8.

Table A8 (both R15): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a first value, dual symbols. The antenna port index set corresponding to table A8 may be denoted as a first antenna port index set #8.

Table B8 (both R18): the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a second value, a dual symbol. The antenna port index set corresponding to table B8 can be denoted as a second antenna port index set #9.

Tables C8-1 and C8-2 (one R15, one R18): the DMRS type information indicates a second DMRS type, and the first DMRS configuration information indicates a second value and a dual symbol; or, the DMRS type information indicates a fourth DMRS type, and the first DMRS configuration information indicates a first value, dual-symbol. The antenna port index set corresponding to the table C8-1 can be referred to as a third antenna port index set #8. The antenna port index set corresponding to the table C8-2 can be referred to as a third antenna port index set #9.

Table C8-1:

table C8-2:

and S505, the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

According to the method 500 of the embodiment of the present application, the terminal device may flexibly switch the antenna port table according to the DMRS configuration information indicated by the DCI signaling, thereby implementing the switching between the R15 port and the R18 port, and/or the switching between the 2 long FD-OCC and the 4 long FD-OCC.

The method 200 is described in detail below in conjunction with the method 600. In the method 600, DMRS type information and DMRS configuration information configured by RRC signaling may jointly indicate an FD-OCC length of a port, and switching of an R15 port and an R18 port, and/or switching of a 2-long FD-OCC and a 4-long FD-OCC may be achieved by different DCI signaling. As shown in fig. 6, the method 600 specifically includes:

s601, the network device sends RRC signaling to the terminal device. Accordingly, the terminal device receives the RRC signaling.

S602, the network device sends DCI signaling to the terminal device. Accordingly, the terminal device receives DCI signaling from the network device.

S603, the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

Reference may be made to S203 with respect to this process.

S604, the terminal equipment determines a plurality of antenna port index group sets according to the DMRS type information.

S604 will be explained in each case.

Case 1:

when the DMRS type information indicates the first DMRS type or the third DMRS type and is a single symbol, an antenna port table determined by the terminal device may be as shown in table D1. It should be understood that table A1, table B1 and table C1 in S504 are part of table D1, respectively. Similarly, table A2, table B2, and table C2 in S504 are part of table D1, respectively. Table D1:

case 2:

when the DMRS type information indicates the first DMRS type or the third DMRS type and is bi-symbol, an antenna port table determined by the terminal device may be as shown in table D2. It should be understood that table A3, table B3 and table C3 in S504 are part of table D2, respectively. Similarly, table A4, table B4, and table C4 in S504 are part of table D2, respectively.

Table D2:

case 3:

when the DMRS type information indicates the second DMRS type or the fourth DMRS type and is a single symbol, an antenna port table determined by the terminal device may be as shown in table D3. It should be understood that table A5, table B5 and table C5 in S504 are part of table D3, respectively. Similarly, table A6, table B6, and table C6 in S504 are part of table D3, respectively.

Table D3:

when the DMRS type information indicates the second DMRS type or the fourth DMRS type and is dual-symbol, the antenna port table determined by the terminal device may be as shown in Table D4-1 or Table D4-2.

Table D4-1:

table D4-2:

each of the above tables D1 to D4 includes one or more of the following features. The following description will be made by taking table D1 as an example.

The method is characterized in that:

in the plurality of antenna port index groups included in table D1, there are two antenna port index groups, where both antenna port index groups include the same port (denoted as port # a), but the lengths of FD-OCCs corresponding to port # a in the two antenna port index groups are different.

For example, in table D1, port 0 corresponding to "index =29" is FD-OCC2 long, and port 0 corresponding to "index =0" is FD-OCC4 long.

And (2) feature:

table D1 includes a plurality of antenna port index groups, where there are two ports (denoted as port # B and port # C), the two ports are in the same CDM group, and port # B is an R15 port and port # C is an R18 port.

For example, for "index =40" in table D1, a port combination corresponding to a 2-long non-orthogonal sequence of 4-long orthogonal sequences is indicated.

And (3) feature:

the table D1 includes a plurality of antenna port index groups, each of which includes a port # D and a port # E, but the FD-OCC length corresponding to the port # D is different from the FD-OCC length corresponding to the port # E.

For example, for antenna port index group "0 (FD-OCC 2), 1,9" corresponding to "index =42" in table D1, the FD-OCC length corresponding to port 0 is 2, and the FD-OCC length corresponding to port 9 is 4.

And (4) feature:

all optional combinations of R18 ports are included in table D1.

And (5) feature:

all combinations of R15 ports are included in table D1. Alternatively, all combinations of R15 ports are not included in table D1.

S605, the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

And S606, the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the DMRS type information and the first DMRS configuration information.

And when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates the first value, the frequency domain mask length corresponding to the port in the first antenna port index group is 2.

And when the DMRS type information indicates a third DMRS type or a fourth DMRS type and the first DMRS configuration information indicates a second value, the frequency domain mask length corresponding to the port in the first antenna port index group is 4.

And when the DMRS type information indicates a third DMRS type or a fourth DMRS type and the first DMRS configuration information indicates a first value, the frequency domain mask length corresponding to the port in the first antenna port index group is 2.

When the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates the second value, the first antenna port index group includes a port with a frequency domain mask length of 2 and a port with a frequency domain mask length of 4. In other words, the FD-OCC length of the port defined in R15 in the first antenna port index group is 2, and the FD-OCC length of the newly added port in R18 is 4.

According to the method 600 of the embodiment of the present application, the network device may send different DCI signaling to indicate different DMRS configuration information, thereby implementing the FD-OCC length switching.

According to the foregoing method, fig. 7 illustrates a communication apparatus provided in this embodiment, where the communication apparatus includes a transceiving unit 701 and a processing unit 702.

The transceiving unit 701 may be configured to implement a corresponding information transceiving function. The transceiving unit 701 may also be referred to as a communication interface or a communication unit. The processing unit 702 may be used to perform processing operations.

The apparatus further illustratively includes a storage unit that can be used to store instructions and/or data, and the processing unit 702 can read the instructions and/or data in the storage unit to cause the apparatus to implement the actions of the apparatus in the foregoing method embodiments.

As a first implementation manner, the apparatus may be the terminal device in the foregoing embodiment, and may also be a component (e.g., a chip) of the terminal device. The receiving and sending unit and the processing unit may be configured to implement relevant operations of the terminal device in the foregoing method embodiments. Illustratively, the transceiver unit is configured to implement S201 and S202, and the processing unit is configured to implement S203. Alternatively, the transceiving unit is used to implement S301 and S302, and the processing unit is used to implement S303, S304, and S305. Or, the transceiving unit is used for realizing S401 and S402, and the processing unit is used for realizing S403, S404, S405, and S406. Or, the transceiver is used for realizing S501 and S502, and the processing unit is used for realizing S503, S504, and S505. Or, the transceiver is used to implement S601 and S602, and the processing unit is used to implement S603, S604, S605 and S606.

As a second implementation manner, the apparatus may be the network device in the foregoing embodiment, and may also be a component (e.g., a chip) of the network device. The receiving and sending unit and the processing unit may be configured to implement relevant operations of the network device in the foregoing method embodiments. Illustratively, the transceiver unit is used to implement S201 and S202. Alternatively, the transceiving unit is used to implement S301 and S302. Alternatively, the transceiving unit is used to implement S401 and S402. Alternatively, the transceiving unit is used to implement S501 and S502. Alternatively, the transceiving unit is used to implement S601 and S602.

It should be understood that the specific processes of the units for executing the corresponding steps have been described in detail in the above embodiments of the methods, and therefore, for brevity, are not described again here.

The transceiver unit may be replaced by a transceiver (for example, the transmitting unit in the transceiver unit may be replaced by a transmitter, and the receiving unit in the transceiver unit may be replaced by a receiver), and other units, such as a processing unit, may be replaced by a processor, to respectively perform the transceiving operation and the related processing operation in each method embodiment.

Furthermore, the transceiver 701 may also be a transceiver circuit (for example, may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit.

It should be understood that the apparatus in fig. 7 may be the apparatus in the foregoing method embodiment, and may also be a chip or a chip system, for example: system on chip (SoC). The receiving and sending unit can be an input and output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. And are not limited herein.

An embodiment of the present application further provides a communication apparatus, as shown in fig. 8, including: a processor 801 and a communication interface 802. The processor 801 is configured to execute computer programs or instructions stored in the memory 803 or to read data stored in the memory 803 to perform the methods in the above method embodiments. Illustratively, the processor 801 is one or more. Communication interface 802 is used for the reception and/or transmission of signals. For example, the processor 801 is configured to control the communication interface 802 to receive and/or transmit signals.

Illustratively, as shown in fig. 8, the communication device may further include a memory 803, the memory 803 being used for storing computer programs or instructions and/or data. The memory 803 may be integrated with the processor 801 or may be provided separately. Of course, the communication device may not include the memory 803, and the memory 803 may be disposed outside the communication device. Illustratively, the memory 803 may be one or more.

Illustratively, the processor 801, the communication interface 802, and the memory 803 are interconnected by a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 804 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 8, but that does not indicate only one bus or one type of bus.

As a first implementation manner, the apparatus may be the terminal device in the foregoing embodiment, and may also be a component (e.g., a chip) of the terminal device. The communication interface and the processor may be configured to implement relevant operations of the terminal device in the foregoing method embodiments. Illustratively, the communication interface is used to implement S201 and S202, and the processor is used to implement S203. Alternatively, the communication interface is used to implement S301 and S302, and the processor is used to implement S303, S304, and S305. Alternatively, the communication interface is used to implement S401 and S402, and the processor is used to implement S403, S404, S405, and S406. Alternatively, the communication interface is used for realizing S501 and S502, and the processor is used for realizing S503, S504, S505. Alternatively, the communication interface is used to implement S601 and S602, and the processor is used to implement S603, S604, S605, and S606.

As a second implementation manner, the apparatus may be the network device in the foregoing embodiment, and may also be a component (e.g., a chip) of the network device. The communication interface and the processor may be used to implement the relevant operations of the network device in the above embodiments of the methods. Illustratively, the communication interface is used to implement S201 and S202. Alternatively, the communication interface is used to implement S301 and S302. Alternatively, the communication interface is used to implement S401 and S402. Alternatively, a communication interface is used to implement S501 and S502. Alternatively, the communication interface is used to implement S601 and S602.

It should be appreciated that the processor (e.g., the processor 801) mentioned in the embodiments of the present application may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of the CPU and the NP. The processor may further include a hardware chip. The hardware chip may be an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD). The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

It will also be appreciated that the memory referred to in the embodiments herein, such as memory 803, may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, the disclosed system, apparatus and method can be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and the division of the unit is only one logical function division, and there may be other division ways in actual implementation. For example, functional units in the embodiments of the present application may be integrated into one unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

If embodiments of the present application are implemented in software and sold or used as a stand-alone product, a corresponding computer program (also may be referred to as code, or instructions) may be stored in a computer readable storage medium. The present application provides a computer-readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform any of the possible implementations of the above-described method embodiments.

The computer readable storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

The technical scheme of the application can be embodied in the form of a software product. Accordingly, the present application also provides a computer program product comprising: computer program, which, when being executed, causes a computer to carry out any of the possible implementations of the above-described method embodiments.

In addition, the embodiment of the application also provides a chip system (or a chip). The chip system includes a logic circuit and an input/output interface.

The logic circuit may be a processing circuit in a system-on-chip. The logic circuit may be coupled to the storage unit and call an instruction in the storage unit, so that the system on chip may implement the methods and functions of the embodiments of the present application. The input/output interface may be an input/output circuit in the chip system, which outputs information processed by the chip system, or inputs data or signaling information to be processed into the chip system for processing.

The above description is only for the 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 conceive of the changes or substitutions within the technical scope of the present application, and shall 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. A method of communication, comprising:

the method comprises the steps that terminal equipment obtains at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal (DMRS) configuration information, wherein the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information;

the terminal equipment receives a Downlink Control Information (DCI) signaling from the network equipment, wherein the DCI signaling comprises a first index, the first index is used for indicating first time domain resource allocation information, and the first time domain resource allocation information is one of the at least one time domain resource allocation information;

and the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

2. The method of claim 1,

the terminal device obtaining the at least one time domain resource allocation information and the at least one DMRS configuration information, including:

and the terminal equipment receives Radio Resource Control (RRC) signaling from the network equipment, wherein the RRC signaling comprises a Time Domain Resource Allocation (TDRA) field, and the TDRA field is used for configuring the at least one piece of time domain resource allocation information and the at least one piece of DMRS configuration information.

3. The method of claim 2,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first type and a second type, and the DCI signaling further comprises antenna port indication information;

the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information;

and the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

4. The method of claim 3,

when the DMRS type information indicates the first type and the first DMRS configuration information indicates a first value, corresponding to a first DMRS type;

when the DMRS type information indicates the second type and the first DMRS configuration information indicates a first value, corresponding to a second DMRS type;

when the DMRS type information indicates the first type and the first DMRS configuration information indicates a second value, corresponding to a third DMRS type;

and when the DMRS type information indicates the second type and the first DMRS configuration information indicates a second value, corresponding to a fourth DMRS type.

5. The method according to any one of claims 3 to 4,

when the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

6. The method of claim 2,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type and a fourth DMRS type, and the DCI signaling further comprises antenna port indication information;

the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information;

the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information;

and the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the first DMRS configuration information.

7. The method of claim 6,

when the DMRS type information indicates the first DMRS type or the second DMRS type, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

8. The method according to any one of claims 6 to 7,

the determining, by the terminal device, the frequency domain mask length of the port in the first antenna port index group includes:

when the first DMRS configuration information indicates a first value, the terminal device determines that the frequency domain mask length corresponding to a port in the first antenna port index group is 2;

and when the first DMRS configuration information indicates a second value, the terminal equipment determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 4.

9. The method of claim 2,

the method further comprises the following steps:

10. The method of claim 9,

the set of antenna port index groups satisfies any one of:

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the set of antenna port index groups is a first set of antenna port index groups;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, the set of antenna port index groups is a second set of antenna port index groups;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value; or, when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, the set of antenna port indices is a third set of antenna port indices.

11. The method according to any one of claims 9 to 10,

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, ports in the set of antenna port index groups belong to a subset of a second set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports.

12. The method according to any one of claims 9 to 10,

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, ports in the set of antenna port index groups belong to a subset of a second set of DMRS ports;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

13. The method of claim 2,

the method further comprises the following steps:

and the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the DMRS type information and the first DMRS configuration information.

14. The method of claim 13,

the antenna port index set comprises a second antenna port index set and a third antenna port index set, and the frequency domain mask length of the first port in the second antenna port index set is different from the frequency domain mask length of the first port in the third antenna port index set.

15. The method according to claim 13 or 14,

the antenna port index group set comprises a second port and a third port, the second port and the third port are in the same CDM group, the second port is a port in the first DMRS port set, and the third port is a port in the second DMRS port set.

16. The method according to any one of claims 13 to 15,

the antenna port index group set comprises a fourth antenna port index group, the fourth antenna port index group comprises a fourth port and a fifth port, and the frequency domain mask length corresponding to the fourth port is different from the frequency domain mask length corresponding to the fifth port.

17. The method of any one of claims 13-16,

the determining, by the terminal device, a frequency domain mask length corresponding to a port in the first antenna port combination includes:

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the terminal device determines that the frequency domain mask length corresponding to a port in the first antenna port index group is 2;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, the terminal device determines that a frequency domain mask length corresponding to a port in the first antenna port index group is 4;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates the first value, the terminal device determines that a frequency domain mask length corresponding to a port in the first antenna port index group is 2;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates the second value, the terminal device determines that the first antenna port index group includes a port with a frequency domain mask length of 2 and a port with a frequency domain mask length of 4.

18. The method of any one of claims 5, 7, 11, 12, 15,

the frequency domain mask length corresponding to the ports in the first DMRS port set is 2, and the frequency domain mask length corresponding to the ports in the second DMRS port set is 4.

19. The method according to any one of claims 3, 6, 9, 13,

the antenna port index set comprises a plurality of antenna port index sets, wherein the plurality of antenna port index sets are corresponding to a plurality of indexes, and the antenna port indication information is used for indicating one index in the plurality of indexes.

20. A method of communication, comprising:

the method comprises the steps that network equipment sends Radio Resource Control (RRC) signaling to terminal equipment, wherein the RRC signaling comprises a Time Domain Resource Allocation (TDRA) field, the TDRA field is used for configuring at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal (DMRS) configuration information, and the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information;

the network device sends a Downlink Control Information (DCI) signaling to the terminal device, where the DCI signaling includes a first index, and the first index is used to indicate first time domain resource allocation information, where the first time domain resource allocation information is one of the at least one time domain resource allocation information.

21. The method of claim 20,

the first time domain resource allocation information corresponds to first DMRS configuration information;

the first DMRS configuration information indicates a first value corresponding to any one of: the frequency domain mask length of the DMRS port is 2, and the protocol version is r15;

alternatively, the first and second electrodes may be,

the first DMRS configuration information indicates a second value corresponding to any one of: the frequency domain mask length of the DMRS port is 4, and the protocol version is r18.

22. The method of claim 20 or 21,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first type and a second type, and the DCI signaling further comprises antenna port indication information.

23. The method of claim 20 or 21,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type and a fourth DMRS type, and the DCI signaling further comprises antenna port indication information.

24. A communications device comprising means for performing the method of any of claims 1-23.

25. A communications apparatus, comprising: a communication interface and a processor for executing a computer program or instructions causing the communication device to perform the method of any of claims 1-23.

26. A computer-readable storage medium comprising a computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-23.

27. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-23.