CN116528283A

CN116528283A - Communication method, device and system

Info

Publication number: CN116528283A
Application number: CN202210075543.4A
Authority: CN
Inventors: 丁洋; 李胜钰; 李锐杰; 官磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-01-22
Filing date: 2022-01-22
Publication date: 2023-08-01
Also published as: WO2023138507A1

Abstract

The embodiment of the application provides a communication method, a communication device and a communication system. The method comprises the following steps: the network equipment indicates the corresponding relation between the reporting power bias and the channel quality information of the terminal equipment, the corresponding relation is reported by the terminal equipment, and the network equipment flexibly adjusts the transmitting power of the data according to the corresponding relation. By adopting the embodiment of the application, the network equipment can flexibly adjust the data transmission power, which is beneficial to energy saving of the network equipment, and meanwhile, accurate link self-adaptive adjustment is carried out, so that the problem of mismatching between fixed power offset and downlink data transmission power is avoided, and the communication quality is improved.

Description

Communication method, device and system

Technical Field

The embodiment of the application relates to the field of communication. And more particularly, to a communication method, apparatus, and system.

Background

In the communication process, the network equipment sends a measurement signal to the terminal equipment, the terminal obtains channel state information (channel state information, CSI) according to the measurement signal, the CSI is reported to the network equipment, and the network equipment and the terminal equipment communicate according to the CSI. But the transmit power of the measurement signal may be different from the power at which the network device transmits the downstream data. The network device cannot perform accurate link adaptation based on the CSI reported by the terminal device, which may affect the communication performance. Therefore, how to improve the accuracy of the channel state information obtained by the network device to improve the reliability of data transmission is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a communication method, a device and a system, and the method can improve the reliability of data transmission.

In a first aspect, embodiments of the present application provide a communication method, which may be performed by a terminal device, or may also be performed by a chip or a circuit for a terminal device, which is not limited in this application. For convenience of description, an example will be described below in terms of execution by the terminal device.

The terminal equipment receives first information, the first information is used for indicating the terminal equipment to send first parameters, the first parameters are used for representing the corresponding relation between the power offset and the channel quality information, and the terminal equipment reports the first parameters according to the first information.

According to the method, the network equipment indicates the corresponding relation between the reported power bias and the channel quality information of the terminal equipment, and the sending power of the downlink data is determined according to the corresponding relation, so that the network equipment can flexibly adjust the sending power of the data, the energy saving of the network equipment is facilitated, the mismatch between the fixed power bias and the sending power of the downlink data is avoided, and the accuracy of the sending power of the downlink data can be improved, thereby improving the communication quality.

In one possible implementation, the first parameter includes a first sub-parameter for indicating a correspondence between a power offset corresponding to the first rank value and channel quality information, and a second sub-parameter for indicating a correspondence between a power offset corresponding to the second rank value and channel quality information.

In the mode, the network equipment can determine the transmission power of the downlink data by reporting the corresponding relation between the power offset and the channel quality information under different rank values and taking the corresponding relation under different rank values as a reference, so that the flexibility of the network equipment in determining the transmission power of the downlink data is improved, and the accuracy of the transmission power of the downlink data can be further improved.

In one possible implementation, the power offset and the channel quality information correspond to a linear relationship.

In one possible implementation, the first parameter is a ratio of a first difference value to a second difference value, where the first difference value is a difference value between a first power offset and a second power offset, and the second difference value is a difference value between a value of a first channel quality information and a value of a second channel quality information, where the first power offset corresponds to the value of the first channel quality information and the second power offset corresponds to the value of the second channel quality information.

In this way, the linear relation between the power offset and the channel quality information is indicated by the reporting ratio, so that the signaling overhead can be saved compared with the case of reporting a plurality of channel state information.

In one possible implementation, the channel quality information includes at least one of: signal to interference plus noise ratio, channel quality indicator CQI, transmission efficiency or modulation coding scheme MCS.

In the mode, various corresponding relations can be reported, and the flexibility of reporting the corresponding relations between the power offset and the channel quality information is improved.

In one possible implementation, the first information is further used to configure channel state information measurement or channel state information reporting.

In other words, the first information may be carried in the channel state information measurement configuration information or the channel state information reporting configuration information.

In one possible implementation, the first parameter is carried in channel state information.

In the mode, multiple information is carried in the same signaling to report, so that the cost can be saved.

In one possible implementation manner, first capability information is sent, where the first capability information is used to indicate the number of channel state information processing units corresponding to the reported first parameter. Or, the number of channel state information processing units corresponding to the first parameter is transmitted. The number of channel state information processing units corresponding to the first parameter may also be understood as the processing capability of the terminal device for channel state information under the first parameter.

The terminal device reports the number of the channel state information processing units or the first capability information to the network device, and the network device can reasonably schedule measurement resources according to the number or the capability.

In a second aspect, embodiments of the present application provide a communication method, which may be performed by a network device, or may also be performed by a chip or a circuit for a network device, which is not limited in this application. For ease of description, the following description will be given by way of example as being executed by a network device. The method may include: the network device sends first information, the first information is used for indicating the terminal device to send first parameters, the first parameters are used for representing the corresponding relation between the power bias and the channel quality information, and the network device receives the first parameters.

In one possible implementation, the first parameter includes at least one sub-parameter, and any one of the at least one sub-parameter is used to characterize a correspondence between a power offset of a rank value and channel quality information.

In one possible implementation, the power offset corresponds to channel quality information in a linear relationship.

In one possible implementation, the channel quality information includes at least one of: signal-to-interference-and-noise ratio, CQI, transmission efficiency, or MCS.

In one possible implementation, channel state information is received, the first parameter being carried in the channel state information.

In one possible implementation manner, first capability information is received, where the first capability information is used to indicate the number of channel state information processing units corresponding to the reported first parameter, and measurement resources are determined according to the first capability information, where the measurement resources are used by the terminal device to measure the channel state.

It should be understood that the second aspect is a method on the network device side corresponding to the first aspect, and descriptions of relevant explanation, supplement and beneficial effects of the first aspect are equally applicable to the second aspect, and are not repeated herein.

In a third aspect, embodiments of the present application provide a communication method, which may be performed by a terminal device, or may also be performed by a chip or a circuit for a terminal device, which is not limited in this application. For convenience of description, an example will be described below in terms of execution by the terminal device. The method may include: the terminal equipment receives second information, wherein the second information is used for indicating M transmission efficiency values, M is a positive integer, and the terminal equipment sends N power offsets according to the second information, wherein the N power offsets are carried in channel state information, and N is a positive integer smaller than or equal to M.

According to the method, the network equipment indicates the transmission efficiency, the terminal equipment calculates the corresponding power offset according to the transmission efficiency, the matching degree of the power offset reported by the terminal equipment and the transmission efficiency is improved, the network equipment can determine more reasonable power for transmitting downlink data, and the communication quality is improved.

In one possible implementation, the second information is further used to configure channel state information measurement or channel state information reporting.

In one possible implementation, the M transmission efficiency values correspond to S rank values, where S is a positive integer.

In one possible implementation, S is equal to M, and the M transmission efficiency values are in one-to-one correspondence with the S rank values.

In one possible implementation, the M is equal to N, and the M transmission efficiency values and the N power offsets are in one-to-one correspondence.

In one possible implementation, the number of power offsets is greater than 1, and transmitting the M power offsets includes: and transmitting a first power offset and a first power offset value, wherein the first power offset value is the difference value between a second power offset and the first power offset, the first power offset value is one of at least one power offset value, and the at least one power offset value corresponds to the power offsets except the first power offset in the N power offsets one by one.

That is, N is greater than 1, the N power offsets include a first reference power offset and (N-1) power offset values, the (N-1) power offset values being the difference of the (N-1) power offsets relative to the first reference power offset, respectively, the first reference power offset may be one of the N power offsets.

By reporting one reference value and a plurality of difference values, the method can further save the cost compared with reporting a plurality of power offsets.

In one possible implementation, the N power offsets are determined from the M transmission efficiency values.

In one possible implementation manner, second capability information is sent, where the second capability information is used to indicate the number of channel state information processing units corresponding to the N power offsets to report. Or, the number of channel state information processing units corresponding to the N power offsets is transmitted. The number of channel state information processing units corresponding to the N power offsets may also be understood as the processing capability of the terminal device to determine the channel state information corresponding to the N power offsets.

The terminal device reports the number of the channel state information processing units or the second capability information to the network device, and the network device can reasonably schedule measurement resources according to the number or the capability, so that the communication efficiency is further improved.

In a fourth aspect, embodiments of the present application provide a communication method, which may be performed by a network device, or may also be performed by a chip or a circuit for a network device, which is not limited in this application. For ease of description, the following description will be given by way of example as being executed by a network device. The method may include: the network device sends second information, where the second information is used to indicate M transmission efficiency values, where M is a positive integer, the network device receives N power offsets, where the N power offsets are carried in channel state information, where N is a positive integer less than or equal to M, and where the N power offsets are determined according to the second information.

In one possible implementation, N is greater than 1, and receiving the M power offsets includes: a first power offset and a first power offset value are received, the first power offset value is a difference value between a second power offset and the first power offset, the first power offset value is one of the at least one power offset value, and the at least one power offset value corresponds to one of the N power offsets except the first power offset.

In one possible implementation manner, second capability information is received, where the second capability information is used to indicate the number of channel state information processing units corresponding to the N power offsets to report.

It should be understood that the fourth aspect is a method on the network device side corresponding to the third aspect, and descriptions of relevant explanations, supplements and beneficial effects of the third aspect apply equally to the fourth aspect, and are not repeated here.

In a fifth aspect, an embodiment of the present application provides a communication device, where the device includes a processing module and a transceiver module, where the transceiver module may be configured to receive first information, where the first information is used to instruct a terminal device to send a first parameter, where the first parameter is used to characterize a correspondence between power offset and channel quality information, and where the transceiver module is further configured to report the first parameter according to the first information.

In a sixth aspect, an embodiment of the present application provides a communication device, where the communication device includes a transceiver module and a processing module, where the transceiver module is configured to send first information, where the first information is used to instruct a terminal device to send a first parameter, where the first parameter is used to characterize a correspondence between power offset and channel quality information, and the transceiver module is further configured to receive the first parameter.

In a seventh aspect, an embodiment of the present application provides a communication device, where the communication device includes a transceiver module and a processing module, where the transceiver module is configured to receive second information, where the second information is used to indicate M transmission efficiency values, where M is a positive integer, and the transceiver module is further configured to send N power offsets according to the second information, where the N power offsets are carried in channel state information, and where N is a positive integer.

In an eighth aspect, an embodiment of the present application provides a communication device, where the communication device includes a transceiver module and a processing module, where the transceiver module is configured to send second information, where the second information is used to indicate M transmission efficiency values, where M is a positive integer, and the transceiver module is further configured to receive N power offsets, where the N power offsets are carried in channel state information, where N is a positive integer, and where the N power offsets are determined according to the second information.

It should be understood that the fifth, sixth, seventh and eighth aspects are implementation manners on the device side corresponding to the first, second, third and fourth aspects, and descriptions of related explanations, supplements, possible implementation manners and beneficial effects of the first, second, third and fourth aspects are equally applicable to the fifth, sixth, seventh and eighth aspects, respectively, and are not repeated herein.

In a ninth aspect, embodiments of the present application provide a communications device, including an interface circuit for implementing the functions of the transceiver module in the fifth or seventh aspect, and a processor for implementing the functions of the processing module in the fifth or seventh aspect.

In a tenth aspect, embodiments of the present application provide a communications device, including an interface circuit for implementing the functions of the transceiver module in the sixth or eighth aspect, and a processor for implementing the functions of the processing module in the sixth or eighth aspect.

In an eleventh aspect, embodiments of the present application provide a computer readable medium storing program code for execution by a terminal device, the program code comprising instructions for performing the method of the first aspect or the third aspect, or any or all of the possible manners of the first aspect or the third aspect.

In a twelfth aspect, embodiments of the present application provide a computer readable medium storing program code for execution by a network device, the program code including instructions for performing the method of the second aspect or the fourth aspect, or any or all of the possible manners of the second aspect or the fourth aspect.

In a thirteenth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the method of the first aspect or the third aspect described above, or any or all of the possible ways of the first aspect or the third aspect.

In a fourteenth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the method of the second or fourth aspect or any or all of the possible ways of the second or fourth aspect.

A fifteenth aspect provides a communication system comprising means having the functions of, or any of, the methods and the various possible designs of, or any of the possible ways of, or any of, the first aspect or the third aspect described above.

A sixteenth aspect provides a processor for coupling with a memory for performing the method of the first or third aspect or any or all of the possible ways of the first or third aspect.

A seventeenth aspect provides a processor for coupling with a memory for performing the method of the second or fourth aspect or any or all of the possible ways of the second or fourth aspect.

An eighteenth aspect provides a chip system comprising a processor, and further comprising a memory for executing a computer program or instructions stored in the memory, such that the chip system implements the method of any of the preceding first to fourth aspects, and any possible implementation of any of the preceding aspects. The chip system may be formed of a chip or may include a chip and other discrete devices.

In a nineteenth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the above-described or any of the possible manners of the first or third aspects, or the methods of all of the possible implementations of the first or third aspects.

In a twentieth aspect, there is provided a computer program product storing computer readable instructions that, when run on a computer, cause the computer to perform the second or fourth aspect, or any one of the possible manners of the second or fourth aspect, or a method of all the possible implementations of the second or fourth aspect.

In a twenty-first aspect, a communication system is provided, comprising at least one communication device according to the fifth aspect and/or at least one communication device according to the sixth aspect, for implementing the above-mentioned first or second aspect, or any one of the possible manners of the first or second aspect, or a method of all the possible manners of the first or second aspect.

A twenty-second aspect provides a communication system comprising at least one communication device as claimed in the seventh aspect and at least one communication device as claimed in the eighth aspect, the communication system being arranged to implement the third or fourth aspect described above, or any one of the possible manners of the third or fourth aspect, or a method of all of the possible manners of the third or fourth aspect.

Drawings

Fig. 1 illustrates a system architecture to which embodiments of the present application are applicable.

Fig. 2 shows a flow chart of a communication method according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a correspondence relationship between power offset and channel quality information according to an embodiment of the present application.

Fig. 4 shows a flow chart of another communication method according to an embodiment of the present application.

Fig. 5 shows a schematic block diagram of a communication device according to an embodiment of the present application.

Fig. 6 shows a schematic block diagram of yet another communication device provided by an embodiment of the present application.

Detailed Description

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

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which embodiments of the present application apply. As shown in fig. 1, the communication system comprises a radio access network 100 and a core network 200, and optionally the communication system 1000 may further comprise the internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in fig. 1) and may also include at least one terminal (e.g., 120a-120j in fig. 1). The terminal is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminals and the radio access network device may be connected to each other by wired or wireless means. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1.

The radio access network device may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a fifth generation (5th generation,5G) mobile communication system, a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; the present invention may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The CU can complete the functions of a radio resource control protocol and a packet data convergence layer protocol (packet data convergence protocol, PDCP) of the base station and can also complete the functions of a service data adaptation protocol (service data adaptation protocol, SDAP); the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of a part of the physical layer or the entire physical layer, and for a detailed description of the above protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The radio access network device may be a macro base station (e.g. 110a in fig. 1), a micro base station or an indoor station (e.g. 110b in fig. 1), a relay node or a donor node, etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the wireless access network equipment. For convenience of description, a base station will be described below as an example of a radio access network device.

A terminal may also be referred to as a terminal device, user Equipment (UE), mobile station, mobile terminal, etc. The terminal may be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an unmanned aerial vehicle, a helicopter, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal.

The base station and the terminal may be fixed in position or movable. Base stations and terminals may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aircraft, balloons and satellites. The application scenes of the base station and the terminal are not limited in the embodiment of the application.

The roles of base station and terminal may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured as a mobile base station, terminal 120i being the base station for those terminals 120j that access radio access network 100 through 120 i; but for base station 110a 120i is a terminal, i.e., communication between 110a and 120i is via a wireless air interface protocol. Of course, communication between 110a and 120i may be performed via an interface protocol between base stations, and in this case, 120i is also a base station with respect to 110 a. Thus, both the base station and the terminal may be collectively referred to as a communication device, 110a and 110b in fig. 1 may be referred to as a communication device having base station functionality, and 120a-120j in fig. 1 may be referred to as a communication device having terminal functionality.

Communication can be carried out between the base station and the terminal, between the base station and between the terminal and the terminal through the authorized spectrum, communication can be carried out through the unlicensed spectrum, and communication can also be carried out through the authorized spectrum and the unlicensed spectrum at the same time; communication can be performed through a frequency spectrum of 6 gigahertz (GHz) or less, communication can be performed through a frequency spectrum of 6GHz or more, and communication can be performed using a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more simultaneously. The embodiments of the present application do not limit the spectrum resources used for wireless communications.

In the embodiments of the present application, the functions of the base station may be performed by a module (such as a chip) in the base station, or may be performed by a control subsystem including the functions of the base station. The control subsystem comprising the base station function can be a control center in the application scenarios of smart power grids, industrial control, intelligent transportation, smart cities and the like. The functions of the terminal may be performed by a module (e.g., a chip or a modem) in the terminal, or by a device including the functions of the terminal.

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication equipment. The wireless communication between the communication devices may include: wireless communication between a network device and a terminal, wireless communication between a network device and a network device, and wireless communication between a terminal device and a terminal device. In this embodiment of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".

It should be understood that in the embodiments of the present application, the physical uplink shared channel (physical downlink share channel, PDSCH), the physical downlink control channel (physical downlink control channel, PDCCH) and the physical uplink shared channel (physical uplink share channel, PUSCH) are merely examples of downlink data channels, downlink control channels and uplink data channels, respectively, and that in different systems and different scenarios, the data channels and the control channels may have different names, and the embodiments of the present application are not limited thereto.

In order to facilitate understanding of the aspects of the embodiments of the present application, a description will be made of related concepts.

1. Channel state information reporting configuration (CSI-ReportConfig): the method is mainly used for configuring parameters related to channel state reporting, such as reporting types, reported measurement indexes and the like. Reporting a configuration identifier (reportConfigId), which is an identifier (Id) number of the CSI-ReportConfig, for marking the CSI-ReportConfig; a channel measurement resource (resource-Reference Signal, CSI-RS) resource for configuring channel state information-Reference Signal (CSI-RS) resources of channel measurement, associated to resource configuration by CSI-resource configuration id; interference measurement resources (CSI-IM-resources forinterference), resources of CSI-RS configured for interference measurement, are associated to the resource configuration by CSI-ResourceConfigId.

Optionally, parameters related to CSI reporting may include CSI reporting type (reportConfigType), CSI reporting amount (reportquality), etc., where CSI reporting type may be classified into periodic, semi-persistent, and aperiodic reporting; the network device may be configured by different reporting amounts, so that the terminal device reports different CSI, including CSI-RS resource indication (CSI-RS resource indicator, CRI), rank Indicator (RI), precoding matrix indication (Pre-coding Matrix Indicator, PMI), channel quality indication (Channel Quantity Indicator, CQI), and so on.

2. Channel state information resource configuration (CSI-ResourceConfig): resource-related information for configuring CSI measurements. May include reporting resource identification (CSI-ResourceConfigId) and/or resource-binding queues (CSI-RS-resourcesitsist), etc. Wherein, CSI-ResourceConfigId is used to mark the CSI-ResourceConfig; the CSI-RS-resourcesist may include a set of resources for channel measurements and a set of resources for interference measurements.

3. Channel state information (channel state information, CSI): during the transmission of a signal from a transmitting end to a receiving end over a wireless channel, fading occurs due to the possibility of scattering, reflection and attenuation of energy with distance. The CSI is used to characterize the wireless channel and may include at least one of CQI, PMI, CRI, synchronization signal and physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) resource indication (SSB resource indicator, SSBRI), layer Indication (LI), RI, L1-reference signal received power (reference signal received power, RSRP), and L1-signal-to-interference and noise ratio (signal to interference plus noise ratio, SINR). CSI may be transmitted by the terminal device to the network device over a physical uplink control channel (physical uplink control channel, PUCCH) or a physical uplink shared channel (physical uplink share channel, PUSCH).

CSI report (CSI report): the CSI report is sent by the terminal to the base station, and is used for the network device to learn the channel state when the network device sends downlink information to the terminal device. The 1 CSI report is used to instruct the terminal device to feed back 1 CSI, and different CSI may correspond to different frequency bands, different transmission hypotheses or different reporting modes.

In general, one CSI report may be associated with 1 reference signal resource for channel measurement, and may also be associated with 1 or more reference signal resources for interference measurement. One CSI report corresponds to one transmission resource, i.e. a time-frequency resource used by the terminal device to transmit the CSI.

5. Reference signal: is a known signal provided by the transmitting end to the receiving end for channel estimation or channel sounding. In the embodiments of the present application, the reference signal may be used for channel measurement, interference measurement, etc., such as measuring parameters of reference signal received quality (reference signal receiving quality, RSRQ), SINR, CQI, and/or PMI.

6. Reference signal resources: including at least one of time-frequency resources, antenna ports, power resources, scrambling codes, and the like of the reference signal. The network device may send reference signals to the terminal device based on the reference signal resources, and correspondingly, the terminal device may receive reference signals based on the reference signal resources.

Reference signals referred to in embodiments of the present application may include one or more of the following: channel state information reference signals (channel state information-reference signals, CSI-RS), SSB, or sounding reference signals (sounding reference signal, SRS). Correspondingly, the reference signal resources may include CSI-RS resources, SSB resources, or SRS resources. In some cases, SSB may also refer to SSB resources.

7. Rank (rank) of transmission channel: simply referred to as rank, can be seen as the number of independent parallel channels on the transmission path between the two parties. It can be understood that in the communication process, the two parties support relatively independent data paths at the same time. One data path may correspond to one data stream. In a multiple-input multiple-output (multipleinputmultiple output, MIMO) system, the number of data streams used in the communication between the transmitting and receiving parties is called the number of layers.

In the MIMO system, the number of data streams that can be simultaneously transmitted needs to be determined according to the rank of the spatial channel, or the number of layers in the communication process needs to be determined according to the rank of the spatial channel, so as to reduce interference between information, increase receiving accuracy, and improve information transmission capacity. Since one data path corresponds to one data stream, the number of data paths (or data streams, also referred to as the number of layers) may be represented by a rank value.

8. Modulation coding scheme (modulation and coding scheme, MCS): common modulation schemes include binary phase shift keying (binary phase shift keying, BPSK), quadrature phase shift keying (quadrature phase shift keying, QPSK), quadrature amplitude modulation (quadrature amplitude modulation, QAM), such as 16QAM, 64QAM, etc. The MCS includes a code rate, i.e., a ratio of information bits to coded bits. The MCS may also include spectral efficiency.

Sinr: refers to the ratio of the strength of the received useful signal to the strength of the received interfering signal (noise and interference). During communication, the communication device may select an MCS corresponding to the signal transmission with reference to the SINR.

10. Transmission efficiency: it is also understood that the spectral efficiency is the unit of the spectral efficiency standard is bit/s/Hz. The spectrum efficiency may be the number of information bits transmitted on a Resource Element (RE), and the number of information bits on a RE is related to the MCS, i.e. the number of coded bits represented by the modulation scheme, and the corresponding code rate represents the actual number of information bits transmitted.

11. Power bias: the terminal device determines CSI based on the measurement result of the reference signal and reports the CSI to the base station, but since the CSI is a link parameter for assisting the network device in determining downlink data transmission, and the data transmission and the reference signal transmission may have different transmission powers (or power spectral densities), the CSI calculated by the terminal device based on the measurement result of the reference signal is not necessarily completely aligned with the CSI corresponding to the data transmission. To address this issue, an alternative way is to indicate in the configuration parameters of the reference signal a power offset, which is used to represent the power ratio of the data transmission and the reference signal transmission, typically expressed in decibels (dB), e.g. a power offset may refer to a ratio assumption of energy (energy per resource element, EPRE) per resource element in the physical downlink shared channel (physical downlink shared channel, PDSCH) relative to EPRE of a non-zero power (NZP) CSI-RS, which may be in decibels (dB) or a linear value.

The larger the value of the power offset, the larger the ratio of the power spectral density representing the data transmission to the power spectral density of the reference signal. The terminal device calculates CSI feedback to the network device based on the power offset and the reference signal measurement. Since the transmit power of the data transmission indicated by the power offset is an assumption by the network device and the terminal device about one alignment of the data transmission power, which is not necessarily the same as the transmit power when the network device sends the data transmission, the power offset may also be understood as a power assumption.

For the scheme that the network equipment configures the measurement signal and the power offset, the terminal equipment takes the power offset into consideration when reporting the CSI, calculates the CSI according to the power of the measurement signal and reports the CSI to the network equipment as a reference for the network equipment to send downlink data. However, the difference between the power at which the network device transmits the downstream data and the power at which the measurement signal is transmitted may not be consistent with this power offset. In this case, the network device cannot perform reasonable link adaptation based on CSI reported by the terminal device, resulting in reduced reliability of data transmission. Particularly, when the network energy saving is considered, the network device can obtain energy saving benefits by reducing the transmission power, and the matching degree between the expected power value of the downlink data to be transmitted and the bias is further reduced, so that the communication performance is affected.

In view of the above problems, embodiments of the present application provide a communication method, which can improve the accuracy of the transmission power of downlink data and improve the communication quality. As shown in fig. 2, the method may include the steps of:

step 201: the network device sends first information to the terminal device, and correspondingly, the terminal device receives the first information.

The first information is used for indicating the terminal equipment to send a first parameter, and the first parameter is used for representing the corresponding relation between the power offset and the channel quality information. Optionally, the correspondence between the power offset and the channel quality information is a functional relationship. Wherein the channel quality information includes at least one of: signal to interference plus noise ratio, channel quality indicator CQI, transmission efficiency or modulation coding scheme MCS. That is, the correspondence of the power offset and the channel quality information may be: one or more of a correspondence of power offset to signal to interference plus noise ratio, a correspondence of power offset to MCS, a correspondence of power offset to CQI, or a correspondence of power offset to transmission efficiency.

The correspondence between the power offset and the channel quality information may be a linear relationship, and when the correspondence between the power offset and the channel quality information is a functional relationship, the linear relationship may be understood as a linear function relationship, where the first parameter may be a ratio or a slope of a linear function. Illustratively, the first parameter is a ratio of a first difference value to a second difference value, the first difference value being a difference value between a first power offset and a second power offset, the second difference value being a difference value between a value of the first channel quality information and a value of the second channel quality information, the first power offset corresponding to the value of the first channel quality information, the second power offset corresponding to the value of the second channel quality information. In this case, the first parameter is the slope of a fitted plot of power bias as a function of channel quality information.

It should be noted that when there are a plurality of power offsets and channel quality information, the first parameter may be a slope of the fitted graph, or it is understood that the first parameter may be an approximation. In other words, there may be a case where the ratio of a certain channel quality information and its corresponding power offset is different from the fitting slope among the ratios of the plurality of channel quality information and the plurality of power offsets. As shown in fig. 3, taking the channel quality information as an example, the ratio of the signal to interference noise ratio 1 to the power offset 1, the ratio of the signal to interference noise ratio 2 to the power offset 2, the ratio of the signal to interference noise ratio 5 to the power offset 5 are on the fitting graph, and the ratio of the signal to interference noise ratio 3 to the power offset 3, and the ratio of the signal to interference noise ratio 4 to the power offset 4 are not on the fitting graph. However, the ratio of signal to interference plus noise ratio 3 to power offset 3, the ratio of signal to interference plus noise ratio 4 to power offset 4 can be approximately considered to follow the slope of the fitted plot. That is, a certain deviation threshold is allowed for the ratio of channel quality information to power offset.

In an alternative manner, the first information may be used to configure channel state information measurement or channel state information reporting, that is, the first information is carried in a channel state information resource configuration (CSI-resource config) or a channel state information reporting configuration (CSI-ReportConfig), and a field may be newly added in the channel state information resource configuration or the channel state information reporting configuration, where the field indicates the terminal device to send the first parameter. Taking the example that the first information is carried on CSI-ReportConfig as an example, the newly added field may indicate that the reporting amount is CRI, RI, CQI and the first parameter K, and a possible example is as follows.

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It should be understood that the first information may also be carried on other information or separately indicated by the network device, which is not limited in this application.

The first parameter may include at least one sub-parameter, and any one of the at least one sub-parameter is used to characterize a correspondence between a power offset of a rank value and channel quality information. At this time, the first parameter may be understood as a set of parameters. In this way, optionally, each sub-parameter included in the first parameter may be a correspondence between a power offset corresponding to a rank value and channel quality information, for example, the first parameter includes a first sub-parameter for indicating a correspondence between a power offset corresponding to the first rank value and channel quality information and a second sub-parameter for indicating a correspondence between a power offset corresponding to the second rank value and channel quality information.

The rank value may be indicated by CSI-ReportConfig as described above. For example, the network device indicates the terminal device to report the first parameter K through cri-RI-CQI-K, where RI is used to indicate the rank value. For example, when RI is 3, the rank is represented as a maximum of 3, that is, the rank may have three values: a, the rank value is 3; b, the rank value is 2; and C, the rank is 1. Taking RI as an example, the first parameter may include 3 subparameters, namely subparameter 1, subparameter 2, and subparameter 3. Corresponding to the above case A, the corresponding relationship between the power offset and the channel quality information is the relationship A, and can be represented by the subparameter 1; corresponding to the above case B, the corresponding relationship between the power offset and the channel quality information is the relationship B, and can be represented by the subparameter 2; corresponding to the above case C, the corresponding relationship between the power offset and the channel quality information is the relationship C, and may be represented by the subparameter 3.

It is understood that when the first parameter is a ratio, the values of the first parameter may be different corresponding to different rank values. Under the same rank value, the values of the first parameters may be different for different channel quality information. The physical meaning of the rank value expression here is the number of data streams (number of layers). For example, a rank value of 2 indicates that two data streams are included. For example, when the rank value is 2, the ratio of the power offset to the signal to interference plus noise ratio is 2, the ratio of the power offset to the MCS is 2.1, the ratio of the power offset to the CQI is 2.6, and the ratio of the power offset to the transmission efficiency is 2.3. When the rank value takes 3, the ratio of the power offset to the signal to interference plus noise ratio is 3, the ratio of the power offset to the MCS is 2.7, the ratio of the power offset to the CQI is 3.6, and the ratio of the power offset to the transmission efficiency is 3.3. It should be understood that the values of the above ratios are by way of example only and not by way of limitation. Of course, the values of the first parameters may be the same corresponding to different ranks, which is not limited in this application.

When the first parameter is the slope K in step 201, one possible calculation method is:

the terminal equipment measures reference signals according to the CSI and simulates power offset delta ₂ ，……,Δ _m Calculation of { CSI } ₂ …，CSI _m Fitting to obtain a slope value K, and reporting. For example,

wherein the power offset { delta } ₂ ，……,Δ _m The terminal device may define, for example, delta ₁ And { delta ] ₂ ，……,Δ _m The arithmetic series may be composed of delta ₁ Power offset, e.g., delta, for network device to terminal device ₁ May be configured by a resource configuration (CSI-ResourceConfig) of the CSI measurement reference signal, the power offset delta ₁ It can be understood that the difference between the transmission power of the CSI-RS and the transmission power of the predefined downlink data.

The channel quality information CSI may be calculated by the terminal device based on the power offset. One possible calculation is as follows:

taking SINR as an example of channel quality information, a terminal device may determine SINR according to: the method comprises the steps of a transmission channel corresponding to a target data flow from network equipment to terminal equipment, a receiving vector of the terminal equipment to the target data flow, an interference autocorrelation matrix outside the network equipment, power offset and signal interference noise ratio.

Specifically, under single-user multi-stream or multi-user multi-stream transmission, assuming that the user side samples a minimum mean square error (minimum mean square error, MMSE) receiver, the power of a reference signal received by a terminal device is P, and a network device sends a power offset delta to the terminal device ₁ After that, the terminal device may determine the value according to ρ= (P- Δ) ₁ ) And calculating the power offset proportion rho by P.

The received SINR of the terminal device may be expressed as a relationship of equation (1):

it is possible to obtain a solution that,

wherein h is _l H for a transmission channel (including precoding) corresponding to a target data stream from the network device to the terminal device _j Is a transmission channel (including precoding) corresponding to the interference data stream from the network device to the terminal device, and these two items can be measured by CSI measurement signals. R is R _inter The interference autocorrelation matrix outside the target network device can be obtained by using the zero-power CSI measurement signal. c is the receiving vector of the terminal equipment to the target data stream.

From the above formula, when Σ _j≠l h _j h _j ^H ＞＞R _inter +σ _n ² I, that is, when the inter-stream interference is the dominant interference, the received SINR of the terminal device is approximately independent of the network device side transmit power offset ratio ρ. Conversely, whenIn this case, the received SINR of the terminal device linearly decreases with the network device side transmission power offset ratio ρ. When sigma _j≠l h _j h _j ^H And->SINR when the strength is comparable _l The value of (ρ) is between SINR _l (1) Sum ρ·sinr _l (ρ) is a value between.

Step 202: and the terminal equipment reports the first parameter to the network equipment according to the first information, and correspondingly, the network equipment receives the first parameter.

It should be understood that when the first parameter comprises a plurality of sub-parameters, the terminal device reports the first parameter to the network device, i.e. the terminal device sends the plurality of sub-parameters to the network device.

In CQI ₁ As an example of reporting quality (or CQI), the terminal device may measure reference signals and power offset delta according to the received CSI ₁ Calculating CQI to be reported ₁ . In particular. Here CQI ₁ All reported wideband CQI and narrowband CQI are broadly referred to. Wherein CQI is ₁ The calculation method of (1) is as follows: obtaining SINR according to equation (2), and then finding corresponding CQI in the CQI quantization table according to SINR ₁ 。

Alternatively, when RI is greater than 1, the terminal device may calculate the first parameters (i.e. the multiple sub-parameters) corresponding to all possible rank values by the above method. For example, RI takes 3, which indicates that the rank value is at most 3, that is, three cases including 1, 2, and 3 are included (refer to case A, B, C in step 201). The terminal device needs to calculate the corresponding first parameters for the three cases respectively.

Optionally, the terminal device reports the first parameter K, which may be a value of reporting K, or an index corresponding to the value of reporting K. For example, the network device configures in advance, through RRC signaling, a candidate value of K and its index, where the candidate value is a possible value of K. After determining the value of K, the terminal device reports the index of the value in the value to the network device. It should be understood that there may be some error between the K value determined by the terminal device and the candidate value of K preconfigured by the network device. For example, the K value determined by the terminal device is 2.13, and in this case, the terminal device may report a candidate value close to the K value, for example, report 2.1, or report an index #1 corresponding to 2.1. That is, the network device and the terminal device may report the rule in advance, for example, the rule may be: when the K value determined by the terminal equipment has errors with the candidate value, reporting the candidate value with the smallest difference value with the K value or reporting the index of the candidate value. In another possible mode, a certain error exists between the K value determined by the terminal equipment and the candidate value preconfigured by the network equipment, and when the difference value between the K value determined by the terminal equipment and the candidate value preconfigured by the network equipment is within the error range, the candidate value is reported; if the difference value between the K value determined by the terminal equipment and the candidate value preconfigured by the network equipment is not in the error range, searching for a candidate value with the difference value between the K value determined by the terminal equipment and the candidate value in the error range, and reporting the candidate value. The range of the error may be predefined, or may be configured by the network device for the terminal device, or may be indicated by the network device to the terminal device, which is not limited in the embodiment of the present application.

Specifically, as shown in table 1, when determining that the value of K is 2.3, the terminal device may report 2.3 to the network device, or may report #2 to the network device.

Table 1K candidate values and indices

Candidate value of K	Index
		2.1	#1
2.3	#2
		2.5	#3
3	#4
		3.2	#5

It should be understood that table 1 is by way of example only and not limitation.

It should be understood that, when the terminal device reports the first parameter K, multiple sub-parameters of the first parameter may be reported. For example, the terminal device receives cri-RI-CQI-K, where RI has a value of 3, corresponding to the cases A, B and C in step 201, and reports the subparameter 1, subparameter 2, and subparameter 3 to the network device. The terminal device may report indexes corresponding to the multiple sub-parameters to the network device. The terminal equipment simultaneously reports the corresponding relation between the channel quality information corresponding to a plurality of rank values and the power offset, which is beneficial to improving the accuracy of dispatching and selecting the MCS by the network equipment.

There are several ways in which the terminal device may report the K value, and several examples are given below.

In the first mode, when the terminal device reports a plurality of K values, the actual values or indexes of the K values may be reported, and for example, the terminal device needs to report three K values, 19, 18, 17 respectively, and the terminal device may report 19, 18, 17. Alternatively, the terminal device may report the index corresponding to the three K values, the index 1 corresponding to the K value 19, and the index 2,K corresponding to the K value 18 and the index 3 corresponding to the K value 17. The terminal device may report 1,2,3.

In the second mode, the terminal device may report a reference K value and a plurality of offset values of the reference K value. For example, the terminal device may report three K values, 19, 18, and 17, respectively, and the terminal device may report an actual value of the first K value (i.e., the reference K value) and offset values of the remaining two K values relative to the first K value, such as 19,1,2. The terminal may also report offset values for the indices of the plurality of K values, for example, K value 19 for index 1, K value 18 for index 2,K and value 17 for index 3. The terminal device may report 1, +1, +2.

In the third mode, the terminal device may report the actual value of the first K value, and the difference between the remaining K values and the previous K value. For example, the terminal device reports 19,1,1. Or, reporting the index value of the first K value and the difference value between the index values of the other two K values relative to the previous K value, for example, the terminal device needs to report three K values, 19, 18 and 17 respectively, where the K value 19 corresponds to index 1, and the K value 18 corresponds to index 2,K and the K value 17 corresponds to index 3. The terminal device may report 1, +1.

In the second and third modes, the overhead can be further saved compared with the reporting of the power offset by reporting the difference value.

After the terminal device determines the first parameter, the first parameter is sent to the network device. In one possible manner, the terminal device may report the first parameter bearer in channel state information to the network device. It should be understood that the terminal device may also report the first parameter separately, which is not limited in this application.

Optionally, the method may further comprise step 203: the terminal device sends first capability information to the network device, the capability information indicates the number of channel state information processing units (CSI processingunit, CPU) corresponding to the first parameter reported by the terminal device, and correspondingly, the network device receives the first capability information.

Since the terminal device may need to calculate CSI multiple times when calculating the first parameter, the number of CPUs required to calculate the first parameter may be greater than the number of CPUs reported by CSI when not calculating the first parameter. Calculation and reporting may also be understood as measuring and reporting, or as processing.

Possible implementation, number O of channel state information processing units _CPU,K =5, which may indicate that only 5 channel state information processing units are needed for calculating the first parameter, or may indicate that the number of CPUs needed for calculating the first parameter and reporting CSI carrying the first parameter is 5.

In another possible implementation, the first capability information indicates a time domain spreading factor T corresponding to the first parameter. The time domain expansionA factor may be understood as a ratio of the number of time units used by the terminal device to calculate the first parameter to the number of time units used when not calculating the first parameter. For example, the number of CPUs required when the terminal device does not calculate the first parameter is O _CPU,K1 And only 1 time unit is occupied, the terminal may still use only O to report the first parameter _CPU,K1 The time domain expansion factor T is 3, however, since the calculation amount is increased, 3 time units are required for the calculation to be completed. That is, the value of T included in the content of the first capability information transmitted from the terminal device to the network device takes 3. The time unit may be 1 or more symbols, or 1 or more slots, which is not limited in this application.

In yet another possible implementation, the first capability information indicates a scaling factor Z of the number of CPUs corresponding to the first parameter. The scaling factor may be understood as the ratio of the number of CPUs used by the terminal device to calculate the first parameter relative to the number of CPUs used when not calculating the first parameter. For example, the number of CPUs required when the terminal device does not calculate the first parameter is O _CPU,K2 The number of CPUs required by the terminal to calculate the first parameter is Z _CPU,K2 。

It should be understood that the first capability information may be understood as information capable of indicating the number of CPUs required by the terminal device to calculate the first parameter, the indication may include a displayed indication or an implicit indication, such as T or Z as described above, and the first capability information may be understood as the number of CPUs required by the terminal device to calculate the first parameter, such as z×o _CPU,K2 Is a value of (2).

When the terminal device reports the first capability information independently, the first capability information may be reported before the network device sends the first information, or may be reported after the terminal device reports the measurement report, which is not limited in this application.

The terminal equipment reports the first capability information to the network equipment, and the network equipment can schedule measurement resources according to the first capability information, so that the measurement efficiency is further improved.

According to the method, the network equipment indicates the corresponding relation between the reported power offset and the channel quality information of the terminal equipment, and the sending power of the downlink data is determined according to the corresponding relation, so that the energy saving of the network equipment is facilitated, meanwhile, the accurate self-adaptive adjustment of the link is carried out, the mismatch between the fixed power offset and the sending power of the downlink data is avoided, and the accuracy of the sending power of the downlink data can be improved, so that the communication quality is improved.

According to the method, the corresponding relation between the power bias and the channel quality information is reported through the terminal equipment, and the network equipment determines the sending power of the downlink data according to the corresponding relation. The network device may also configure transmission efficiency for the terminal device, where the terminal device determines a power offset according to the transmission efficiency, and the network device determines a transmission power of the downlink data according to the power offset, so that accuracy of the power offset can be improved, and communication quality is further improved.

As shown in fig. 4, the method may include the steps of:

step 401: the network device sends the second information to the terminal device, and correspondingly, the terminal device receives the second information.

The second information is used for indicating M transmission efficiency values, wherein M is a positive integer.

The second information may also be used to configure channel state information measurements or channel state information reporting. In other words, the second information may be carried in a channel state information reporting configuration (CSI-ReportConfig), or the second information may be carried in a channel state information resource configuration (CSI-ResourceConfig). For example, the above-mentioned M transmission efficiency values may be carried in CSI-ReportConfig or CSI-ReportConfig, and taking the example that the M transmission efficiency values may be carried in CSI-ReportConfig, one possible reporting manner is as follows:

It should be appreciated that the above second information may also be used to indicate M transmission efficiency values, sent separately from CSI-ReportConfig or CSI-ResourceConfig. The present application is not limited in this regard.

The second information may include an MCS index and/or a CQI index. Specifically, the terminal device may search the corresponding transmission efficiency from the predefined table according to the MCS index or the CQI index, or search the modulation order and the code rate from the predefined table, and further calculate the transmission efficiency value according to the modulation order and the code rate.

The network device may indicate a transmission efficiency value to the terminal device, for example, M is 3, and three transmission efficiency values are 0.8,0.4,0.2, respectively, where the transmission efficiency value may also be understood as an absolute value of the transmission efficiency.

The network device may indicate a normalized transmission efficiency value to the terminal device, it being understood that the normalized value is typically between 0 and 1. For example, M is 3, the normalized three transmission efficiency values are 1,0.5,0.25, respectively, and the corresponding transmission efficiency values are 0.8,0.4,0.2, respectively. One possible normalization approach: taking 0.8 as a reference value of transmission efficiency, and correspondingly normalizing the transmission efficiency value to be 1;0.4 is one half of 0.8, and the normalized transmission efficiency value corresponding to 0.4 is 0.5; and 0.2 is one fourth of 0.8, the normalized transmission efficiency value corresponding to 0.2 is 0.25. It should be appreciated that the reference value may take any one of the transmission efficiency values. It is also to be understood that the above numbers are by way of example only and not by way of limitation.

The M transmission efficiency values may correspond to S rank values, where S is a positive integer.

In one possible manner, M is smaller than S, and transmission efficiency values corresponding to different rank values may be the same or different. For example, S is 3, and the three rank values are 1, 2, 3, respectively; m is 2, and the transmission efficiencies of 2 are 0.6 and 0.7 respectively. It may be that the rank values 1 and 2 correspond to the transmission efficiency of 0.6, and the rank value 3 corresponds to the transmission efficiency of 0.7.

In another possible manner, M and S are equal, and M transmission efficiency values are in one-to-one correspondence with S rank values. For example, S is 3, and the three rank values are 1, 2, 3, respectively; m is 2, and 2 transmission efficiencies are 0.6,0.7,0.8, respectively. It may be that the rank value is 1 corresponds to transmission efficiency 0.6, the rank value is 2 corresponds to transmission efficiency 0.6, and the rank value is 3 corresponds to transmission efficiency 0.7.

In yet another possible manner, M is greater than S, and a rank value may correspond to multiple transmission efficiency values. For example, S is 3, and the three rank values are 1, 2, 3, respectively; m is 6, and the transmission efficiencies of the 6 are 0.6,0.7,0.6,0.7,0.3,0.8 respectively. It may be that the rank value is 1 corresponds to transmission efficiency of 0.6,0.7, the rank value is 2 corresponds to transmission efficiency of 0.6,0.7, and the rank value is 3 corresponds to transmission efficiency 0.3,0.8.

Regarding the indication and explanation of the rank value, reference may be made to the related explanation in step 201, and no further description is given.

Step 402: and the terminal equipment transmits N power offsets according to the second information, and correspondingly, the network equipment receives the N power offsets, wherein N is a positive integer.

The power offset may be a difference between a power of the CSI measurement signal and a power of transmitting downlink data using a corresponding transmission efficiency. One possible way is that M is equal to N, that is, M transmission efficiency values and N power offsets are in one-to-one correspondence.

The terminal device may determine N power offsets from the M transmission efficiency values.

Illustratively, the terminal device determines the power offset delta based on the received CSI measurement resources (CSI measurement reference signal and power offset delta _A ) And calculating CQI to be reported. The CQI here refers broadly to the reported wideband CQI and narrowband CQI. One way to calculate the CQI is: and finding the corresponding CQI in the CQI quantization table according to the SINR. One method of transmission efficiency calculation is: calculating the current transmission efficiency value SE according to the index of the MCS table corresponding to the CQI and the modulation symbol bit number and the code rate of the MCS _real 。

One calculation method of SINR may refer to the description in step 202, and will not be described again.

The terminal device may default SE _real For baseline (reference value), i.e. representing normalized value SE ₁ 1. The terminal equipment measures the reference signal according to the CSI and the next transmission efficiency value SE _m Calculate delta _m So that according to delta _m The obtained CQI _m The calculated transmission efficiency value is equal to SE _m . In general, SE _m Is a number between 0 and 1. The calculation process can refer to SE ₁ Is a function of the algorithm of (a). Wherein delta is _m May be required for calculation of (a)By traversing values within a range, i.e. by equation (2), trying different deltas _m Value, determining which delta _m Corresponds to the transmission efficiency value SE _m 。

Alternatively, when the RI value is greater than 1, the terminal device may calculate a corresponding transmission efficiency value for each rank value.

After finishing the calculation of the N power offsets, the terminal equipment sends the N power offsets. There are several ways in which the terminal device may report the power offset value, and several examples are given below.

Mode A: the terminal device may transmit N power offsets. Illustratively, N is 4 and the four power offsets are 8,4,2,1, respectively, with the terminal device sending 8,4,2,1 to the network device.

Mode B: the terminal device may also transmit a power offset value. The power offset value may be understood as the difference between the power offsets corresponding to the different transmission efficiency values.

For example, the terminal device sends the power offset corresponding to the first transmission efficiency value (i.e., the first power offset), and reports the difference (i.e., the power offset value) between the power offsets corresponding to the remaining transmission efficiency values and the first power offset. For example, N is 4, and four power offsets are 8,4,2,1, where the terminal device may report that the power offset corresponding to the first transmission efficiency value is 8, that the offset value of the power offset corresponding to the second transmission efficiency value relative to the power offset corresponding to the first transmission efficiency value is-4, that the offset value of the power offset corresponding to the third transmission efficiency value relative to the power offset corresponding to the first transmission efficiency value is-6, and that the offset value of the power offset corresponding to the fourth transmission efficiency value relative to the power offset corresponding to the first transmission efficiency value is-7. The first transmission efficiency value may be any one of M transmission efficiency values.

Or, the terminal device sends the power offset corresponding to the first transmission efficiency value, and sends the difference value (i.e. the power offset value) between the power offsets corresponding to the rest of the transmission efficiency values and the power offset corresponding to the last transmission efficiency value. For example, N is 4, the four power offsets are 8,4,2,1, the terminal device reports that the power offset corresponding to the first transmission efficiency value is 8, the offset value of the power offset corresponding to the second transmission efficiency value relative to the power offset corresponding to the first transmission efficiency value is-4, the offset value of the power offset corresponding to the third transmission efficiency value relative to the power offset corresponding to the second transmission efficiency value is-2, and the offset value of the power offset corresponding to the fourth transmission efficiency value relative to the power offset corresponding to the third transmission efficiency value is-1.

It should be understood that the terminal device may report the absolute value of the power offset value, and indicate to the network device the magnitude relation between the power offset corresponding to the power offset value and the power offset serving as the reference. For example, when the power offset to be reported is 8 and the power offset to be reported is 4, the power offset value is-4, and the terminal device may report the absolute value of the power offset value of 4 to the network device, which indicates that the power offset to be reported by the network device is smaller than the power offset to be reported as the reference. And when the power offset value is positive, the terminal equipment reports the power offset value to the network equipment, or the terminal equipment can report the power offset value to the network equipment and simultaneously indicate the power offset required to be reported to the network equipment to be larger than the power offset serving as a reference.

By reporting a reference value and a plurality of difference values, the method can further save the cost relative to reporting the power offset.

The sequence of reporting the power offset or the power offset value by the terminal equipment is consistent with the sequence of the frequency spectrum efficiency value sent by the network equipment. For example, the spectrum efficiency values sent by the network device are 0.7,0.5,0.4,0.1 in sequence, and the power offset reported by the terminal device is 8,4,2,1 in sequence, wherein the power offset 8 corresponds to the transmission efficiency value 0.7, the power offset 4 corresponds to the transmission efficiency value 0.5, the power offset 2 corresponds to the transmission efficiency value 0.4, and the power offset 1 corresponds to the transmission efficiency value 0.1. The order in which the terminal device reports the power offset or the power offset value may be the default order consistent with the order in which the transmission efficiency values are sent by the network device, or may be preconfigured by the network device for the terminal device.

When the terminal equipment reports, the N power offsets or the power offset values may be carried in the channel state information CSI.

The terminal device may only report a part of power offset or power offset value corresponding to the rank value, and the report content needs to carry the corresponding rank value. For example, the predefined rank value of the network device is {1,2,3,4}, but the terminal device only reports the corresponding power offset or power offset value when the rank value is {1,2 }. Taking 8,4,2,1 as an example, the power offsets corresponding to the rank values {1,2,3,4} respectively, when the terminal device only reports 8 and 4, the rank values 1 and 2 need to be reported simultaneously, the sequence of the power offsets 8 and 4 can be consistent with the sequence of the rank values 1 and 2, when the network device receives 8 and 4, the default 8 is the power offset corresponding to the rank value 1, and the default 4 is the power offset corresponding to the rank value 2.

It should be understood that the above values are merely examples and are not limiting.

Optionally, the method may further comprise step 403: the terminal device sends second capability information to the network device, and correspondingly, the network device receives the second capability information.

The second capability information is used for indicating the number of the channel state information processing units corresponding to the reported N power offsets.

By way of example, the number of channel state information processing units that the terminal device sends to the network device is 5, indicating that 5 channel state information processing units are required for calculating only N power offsets. Or, the second capability indication information is used for indicating the time domain expansion factors corresponding to the N power offsets. Or, the second capability indication information is used for indicating the scaling factor of the number of CPUs corresponding to the N power offsets.

Specifically, reference may be made to the description of the first capability information in step 203, which is not repeated here.

The network device may determine the power of transmitting the downlink data according to the CQI/PMI and the bandwidth scheduled when transmitting the downlink data. For example, the network device obtains the power offset from the CSI report by interpolation or other methods according to the CQI determined by scheduling, so as to obtain the power spectrum density of the downlink data transmitted at this time, and then multiplies the power spectrum density by the bandwidth (frequency domain resource number) to obtain the downlink data transmission power.

Or, the network device may determine the power spectral density according to the power and bandwidth of the downlink data, so as to determine the accurate CQI/PMI.

According to the method, the network equipment indicates the transmission efficiency, the terminal equipment calculates the corresponding power offset according to the transmission efficiency, the matching degree of the power offset reported by the terminal equipment and the transmission efficiency is improved, the network equipment can determine more accurate power for transmitting downlink data, and the communication quality is improved.

It will be appreciated that, in order to implement the functions in the above embodiments, the network device and the terminal device include corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and method steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

Fig. 5 and 6 are schematic structural diagrams of possible communication devices according to embodiments of the present application. These communication devices may be used to implement the functions of the terminal or the base station in the above method embodiments, so that the beneficial effects of the above method embodiments may also be implemented. In the embodiment of the present application, the communication device may be one of the terminals 120a-120j shown in fig. 1, or may be the base station 110a or 110b shown in fig. 1, or may be a module (e.g. a chip) applied to the terminal or the base station.

As shown in fig. 5, the communication device 500 includes a processing unit 510 and a transceiving unit 520. The communication device 500 is configured to implement the functions of the terminal device or the network device in the method embodiment shown in fig. 2 or fig. 4.

When the communication device 500 is used to implement the functionality of the terminal equipment in the method embodiment shown in fig. 2: the transceiver unit 520 is configured to receive the first information; the processing unit 510 is configured to determine a first parameter; the transceiver unit 520 is further configured to transmit the first parameter; the transceiver unit 520 is further configured to transmit the first capability information.

When the communication apparatus 500 is used to implement the functionality of the network device in the method embodiment shown in fig. 2: the transceiver unit 520 is configured to transmit the first information; the transceiver unit 520 is further configured to receive the first parameter; the processing unit 510 is configured to determine downlink data transmission power according to the first parameter; the transceiver unit 520 is further configured to receive the first capability information.

When the communication device 500 is used to implement the functionality of the terminal equipment in the method embodiment shown in fig. 4: the transceiver unit 520 is configured to receive the second information; the processing unit 510 is configured to determine N power offsets; the transceiver unit 520 is further configured to transmit a power offset; the transceiver unit 520 is further configured to transmit the second capability information.

When the communication apparatus 500 is used to implement the functionality of the network device in the method embodiment shown in fig. 4: the transceiver unit 520 is configured to transmit the second information; the transceiver 520 is configured to receive N power offsets; the processing unit 510 is configured to determine downlink data transmission power according to the power offset; the transceiver unit 520 is further configured to receive second capability information.

The above-mentioned more detailed descriptions of the processing unit 510 and the transceiver unit 520 may be directly obtained by referring to the related descriptions in the method embodiment shown in fig. 4, which are not repeated herein.

As shown in fig. 6, the communication device 600 includes a processor 610 and an interface circuit 620. The processor 610 and the interface circuit 620 are coupled to each other. It is understood that the interface circuit 620 may be a transceiver or an input-output interface. Optionally, the communication device 600 may further comprise a memory 630 for storing instructions executed by the processor 610 or for storing input data required by the processor 610 to execute instructions or for storing data generated after the processor 610 executes instructions.

When the communication device 600 is used to implement the method shown in fig. 2 or fig. 4, the processor 610 is used to implement the functions of the processing unit 510, and the interface circuit 620 is used to implement the functions of the transceiver unit 520.

When the communication device is a chip applied to the terminal, the terminal chip realizes the functions of the terminal in the embodiment of the method. The terminal chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal, and the information is sent to the terminal by the base station; alternatively, the terminal chip sends information to other modules in the terminal (e.g., radio frequency modules or antennas) that the terminal sends to the base station.

When the communication device is a module applied to a base station, the base station module realizes the functions of the base station in the method embodiment. The base station module receives information from other modules (such as radio frequency modules or antennas) in the base station, the information being transmitted by the terminal to the base station; alternatively, the base station module transmits information to other modules in the base station (e.g., radio frequency modules or antennas) that the base station transmits to the terminal. The base station module may be a baseband chip of a base station, or may be a DU or other module, where the DU may be a DU under an open radio access network (open radio access network, O-RAN) architecture.

It is to be appreciated that the processor in embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The method steps in the embodiments of the present application may be implemented in hardware, or in software instructions executable by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. The storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a base station or terminal. The processor and the storage medium may reside as discrete components in a base station or terminal.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; but also optical media such as digital video discs; but also semiconductor media such as solid state disks. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage medium.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

Depending on whether the specification applies to the alternatives: in the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present application, the character "/", generally indicates that the associated object is an or relationship; in the formulas of the present application, the character "/" indicates that the front and rear associated objects are a "division" relationship. "including at least one of A, B and C" may mean: comprises A; comprises B; comprising C; comprises A and B; comprises A and C; comprises B and C; including A, B and C.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence number of each process does not mean the sequence of the execution sequence, and the execution sequence of each process should be determined according to the function and the internal logic.

Claims

1. A method of communication, comprising:

receiving first information, wherein the first information is used for indicating terminal equipment to send first parameters, and the first parameters are used for representing the corresponding relation between power offset and channel quality information;

and reporting the first parameter according to the first information.

2. The method of claim 1, wherein the first parameter comprises a first sub-parameter and a second sub-parameter, the first sub-parameter is used for indicating a correspondence between a power offset corresponding to a first rank value and channel quality information, and the second sub-parameter is used for indicating a correspondence between a power offset corresponding to a second rank value and channel quality information.

3. The method according to claim 1 or 2, wherein the correspondence between the power offset and the channel quality information is a linear relationship.

4. The method of claim 3 wherein the first parameter is a ratio of a first difference to a second difference, the first difference being a difference between a first power offset and a second power offset, the second difference being a difference between a value of a first channel quality information and a value of a second channel quality information, the first power offset corresponding to the value of the first channel quality information and the second power offset corresponding to the value of the second channel quality information.

5. The method according to any one of claims 1 to 4, wherein the channel quality information comprises at least one of:

signal to interference plus noise ratio, channel quality indicator CQI, transmission efficiency or modulation coding scheme MCS.

6. The method according to any of claims 1 to 5, wherein the first information is further used for configuring channel state information measurements or channel state information reporting.

7. The method according to any of claims 1 to 6, wherein the first parameter is carried in channel state information.

8. The method according to any one of claims 1 to 7, further comprising:

and sending first capability information, wherein the first capability information is used for indicating the number of channel state information processing units corresponding to the reported first parameter.

9. A method of communication, comprising:

transmitting first information, wherein the first information is used for indicating terminal equipment to transmit first parameters, and the first parameters are used for representing the corresponding relation between power offset and channel quality information;

the first parameter is received.

10. The method of claim 9, wherein the first parameter comprises a first sub-parameter and a second sub-parameter, the first sub-parameter is used for indicating a correspondence between a power offset corresponding to a first rank value and channel quality information, and the second sub-parameter is used for indicating a correspondence between a power offset corresponding to a second rank value and channel quality information.

11. The method according to claim 9 or 10, wherein the power offset corresponds to channel quality information in a linear relationship.

12. The method of claim 11, wherein the first parameter is a ratio of a first difference value to a second difference value, the first difference value being a difference between a first power offset and a second power offset, the second difference value being a difference between a value of a first channel quality information and a value of a second channel quality information, the first power offset corresponding to the value of the first channel quality information and the second power offset corresponding to the value of the second channel quality information.

13. The method according to any of claims 9 to 12, wherein the channel quality information comprises at least one of:

signal-to-interference-and-noise ratio, CQI, transmission efficiency, or MCS.

14. The method according to any of claims 9 to 13, wherein the first information is further used for configuring channel state information measurements or channel state information reporting.

15. The method of any of claims 9 to 14, wherein receiving the first parameter comprises:

And receiving channel state information, wherein the first parameter is carried in the channel state information.

16. The method according to any one of claims 9 to 15, further comprising:

receiving first capability information, wherein the first capability information is used for indicating the number of channel state information processing units corresponding to the reported first parameter;

and determining measurement resources according to the first capability information, wherein the measurement resources are used for measuring the channel state by the terminal equipment.

17. A method of communication, comprising:

receiving second information, wherein the second information is used for indicating M transmission efficiency values, and M is a positive integer;

and according to the second information, N power offsets are sent and carried in the channel state information, wherein N is a positive integer less than or equal to M.

18. The method of claim 17, wherein the second information is further used to configure channel state information measurement or channel state information reporting.

19. The method according to claim 17 or 18, wherein the M transmission efficiency values correspond to S rank values, and S is a positive integer.

20. The method according to any of claims 17 to 19, wherein M is equal to N, and wherein the M transmission efficiency values and the N power offsets are in one-to-one correspondence.

21. The method of any of claims 17 to 20, wherein N is greater than 1, and wherein transmitting N power offsets comprises:

and transmitting a first power offset and a first power offset value, wherein the first power offset value is a difference value between a second power offset and the first power offset, the first power offset value is one of (N-1) power offset values, and the (N-1) power offset values are in one-to-one correspondence with the power offsets except for the first power offset in the N power offsets.

22. The method according to any one of claims 17 to 21, further comprising:

and sending second capability information, wherein the second capability information is used for indicating the number of the channel state information processing units corresponding to the N power offsets to report.

23. A method of communication, comprising:

transmitting second information, wherein the second information is used for indicating M transmission efficiency values, and M is a positive integer;

and receiving N power offsets, wherein the N power offsets are carried in channel state information, N is a positive integer less than or equal to M, and the N power offsets are determined according to the second information.

24. The method of claim 23, wherein the second information is further used to configure channel state information measurement or channel state information reporting.

25. The method of claim 23 or 24, wherein the M transmission efficiency values correspond to S rank values, and S is a positive integer.

26. The method of any of claims 23 to 25, wherein M is equal to N, and wherein the M transmission efficiency values and the N power offsets are in one-to-one correspondence.

27. The method of any of claims 23 to 26, wherein the N is greater than 1, and wherein the receiving the N power offsets comprises:

a first power offset and a first power offset value are received, wherein the first power offset value is a difference value between a second power offset and the first power offset, the first power offset value is one of (N-1) power offset values, and the (N-1) power offset values are in one-to-one correspondence with the power offsets except for the first power offset in the N power offsets.

28. The method according to any one of claims 23 to 27, further comprising:

And receiving second capability information, wherein the second capability information is used for indicating the number of the channel state information processing units corresponding to the N power offsets to report.

29. A communication device comprising a processor and interface circuitry for receiving signals from other communication devices than the communication device and transmitting to the processor or sending signals from the processor to other communication devices than the communication device, the processor being configured to implement the method of any one of claims 1 to 8 or the method of any one of claims 17 to 22 by logic circuitry or execution of code instructions.

30. A communication device comprising a processor and interface circuitry for receiving signals from other communication devices than the communication device and transmitting to the processor or sending signals from the processor to other communication devices than the communication device, the processor being configured to implement the method of any one of claims 9 to 16 or the module of any one of claims 23 to 28 by logic circuitry or execution of code instructions.

31. A computer readable storage medium having stored therein instructions which, when executed by a communication device, implement the method of any one of claims 1 to 8 or the method of any one of claims 17 to 23.

32. A computer readable storage medium having stored therein instructions which, when executed by a communication device, implement the method of any of claims 9 to 16 or the method of any of claims 23 to 28.