CN117998384A

CN117998384A - Communication method and communication device

Info

Publication number: CN117998384A
Application number: CN202211336709.XA
Authority: CN
Inventors: 高君慧; 袁一凌; 金黄平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2024-05-07
Also published as: WO2024088419A1

Abstract

The application provides a communication method and a communication device. In the application, when a terminal device determines to report M superposition coefficients for indicating CSI to a network device, dividing the M superposition coefficients into N groups of superposition coefficients corresponding to N different grouping indexes, and then reporting only one group of superposition coefficients in the N groups of superposition coefficients at i reporting moments, wherein N groups of superposition coefficients formed by the reported group of superposition coefficients and N-1 groups of superposition coefficients reported at least one reporting moment before the i reporting moment correspond to the N different grouping indexes; correspondingly, for the network equipment, when the ith reporting time is over, determining the CSI based on N groups of superposition coefficients formed by a group of superposition coefficients reported at the ith reporting time and N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time. The communication method provided by the application can ensure the accuracy of reporting the CSI and simultaneously can reduce the feedback expenditure of the CSI.

Description

Communication method and communication device

Technical Field

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

Background

In the mobile communication technology, a terminal device needs to report Channel State Information (CSI) to a base station, so that the base station performs data transmission according to the CSI reported by the terminal device.

At present, after the terminal equipment obtains the CSI based on the downlink reference signal sent by the base station, the terminal equipment may report the CSI to the base station by reporting a superposition coefficient corresponding to the CSI at each reporting time, where the superposition coefficient may be used to reconstruct the CSI.

However, when the superposition coefficient corresponding to the CSI is reported currently, there is a problem that the overhead for reporting the CSI is large.

Disclosure of Invention

The application provides a communication method and a communication device, which can ensure the accuracy of reporting the CSI and simultaneously can reduce the reporting cost of the CSI.

In a first aspect, the present application provides a communication method, applied to a terminal device, including: m superposition coefficients are determined to be reported to the network equipment, wherein the M superposition coefficients are used for indicating channel state information of the terminal equipment, and M is a positive integer greater than 1; dividing M stacking coefficients into N groups of stacking coefficients, wherein the N groups of stacking coefficients correspond to N different grouping indexes, the number of the stacking coefficients included in each group of stacking coefficients is smaller than M, and N is a positive integer larger than 1; and reporting a group of superposition coefficients in the N groups of superposition coefficients at the ith reporting time, wherein the N groups of superposition coefficients formed by the group of superposition coefficients and the N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, the ith reporting time is positioned after the first reporting time, the number of the superposition coefficients reported at the first reporting time is M, and i is a positive integer.

In the communication method provided by the embodiment, when the terminal device determines that M stacking coefficients for indicating CSI are reported to the network device, the M stacking coefficients are divided into N groups of stacking coefficients, where the N groups of stacking coefficients correspond to N different grouping indexes, and the number of stacking coefficients included in each group of stacking coefficients is smaller than M, and then only one group of stacking coefficients in the N groups of stacking coefficients is reported at each reporting time, that is, only part of stacking coefficients in the M stacking coefficients are reported at each reporting time.

Specifically, in this embodiment, N groups of stacking coefficients, each of which is formed by a group of stacking coefficients reported at the ith reporting time and N-1 groups of stacking coefficients reported at least one reporting time before the ith reporting time, correspond to N different grouping indexes; correspondingly, for the network equipment, based on a group of superposition coefficients currently reported and N-1 groups of superposition coefficients previously reported, M superposition coefficients reported by the terminal equipment are reconstructed, and CSI corresponding to the terminal equipment at the ith reporting moment is obtained based on the M superposition coefficients.

In other words, in this embodiment, when the terminal device determines to report M stacking coefficients to the network device, instead of reporting M stacking coefficients at each reporting time, the M stacking coefficients are reported through N reporting times (also referred to as time-sharing reporting in the present application). Optionally, the superposition coefficients reported at the N reporting times are obtained by N CSI RS measurements. Or in other words, a set of superposition coefficients reported at each of the N reporting instants may be determined based on the current CSI RS measurements.

It can be understood that the superposition coefficients reported at different reporting moments may have correlation in time, so in the application, when the terminal device reports part of the superposition coefficients through each reporting moment and reports the CSI to the network device by using the mode that the M superposition coefficients are reported at N reporting moments, the terminal device can not only ensure the accuracy of reporting the CSI, but also reduce the cost of reporting the CSI.

With reference to the first aspect, in a possible implementation manner, the method further includes: the first reporting time is a starting time of a long period configured by the network equipment for the terminal equipment, the long period comprises K reporting times, and the ith reporting time is any reporting time except the starting time in the K reporting times.

In the implementation manner, the terminal device reports the M superposition coefficients to the network device at the starting time of the long period, so that the network device can determine the M superposition coefficients even if the number of reporting times between the i-th reporting time of the terminal device and the starting time of the long period is less than N-1.

With reference to the first aspect, in one possible implementation manner, N different packet indexes are taken from 0 to N-1, and a packet index corresponding to a set of superposition coefficients reported at the ith reporting time is i% N.

With reference to the first aspect, in a possible implementation manner, the method further includes: and receiving packet index indicating information sent by the network equipment, wherein the packet index indicating information is used for indicating a packet index corresponding to a group of superposition coefficients reported at the ith reporting moment.

For example, the network device may indicate, through signaling configuration (e.g., RRC, MAC-CE, or DCI), packet index indication information corresponding to a set of superposition coefficients that needs to be reported by the terminal device at the current time.

With reference to the first aspect, in a possible implementation manner, the method further includes: at the ith reporting time, a first bit value and second information are sent, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in a group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value; or transmitting a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating the ratio of the first maximum value to the second maximum value.

In general, when a terminal device feeds back a plurality of superposition coefficients to be reported through a reporting time, the terminal device normalizes the plurality of superposition coefficients to be reported and then reports the normalized superposition coefficients, which is also called as a baseline when reporting, where the maximum amplitude value in the plurality of superposition coefficients is used.

In the time-sharing reporting mode of the present application, since the network device needs to combine N groups of stacking coefficients reported at N reporting moments, in this embodiment, the terminal device may also send one bit of information to the network device at the i-th reporting moment, where the 1-bit of information is used to indicate a magnitude relation between a maximum magnitude value in the stacking coefficients reported at the i-th reporting moment and a maximum magnitude value in the stacking coefficients reported at the first reporting moment.

In addition, in the implementation manner, the terminal device sends the 1-bit information to the network device to indicate the magnitude relation between the amplitude maxima, and sends the information for indicating the ratio between the amplitude maxima to the network device, so that when the network device determines the CSI at the ith reporting time, the relative magnitude relation of M superposition coefficients is accurately restored according to the magnitude relation between the amplitude maxima and the ratio between the amplitude maxima, and the accuracy of the determined CSI is improved.

With reference to the first aspect, in one possible implementation manner, the second information includes a first amplitude value and a first phase, and the third information includes a second amplitude value and a second phase, where the first amplitude value and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude value and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

With reference to the first aspect, in one possible implementation manner, n=2, the method further includes: dividing the M superposition coefficients into N groups of superposition coefficients according to a target grouping mode; wherein the target packet mode includes any one of the following: dividing M stacking coefficients into N groups of stacking coefficients according to polarization directions, dividing the M stacking coefficients according to the polarization directions, arranging the stacking coefficients included in each polarization direction after division according to the sequence from big to small, dividing the stacking coefficients into N groups of stacking coefficients, and dividing the M stacking coefficients into N groups of stacking coefficients after the M stacking coefficients are not arranged according to the polarization directions according to the sequence from big to small.

With reference to the first aspect, in a possible implementation manner, the method further includes: reporting target substrate indication information to a network device, wherein the target substrate indication information is used for indicating a target substrate selected by a terminal device when the terminal device determines the M superposition coefficients, and the target substrate comprises at least one substrate selected from the following: the system comprises a target airspace substrate, a target frequency domain substrate, and a target airspace and frequency domain combined substrate.

In the implementation manner, the terminal equipment can acquire the target substrate selected by the terminal equipment by reporting the target substrate indication information to the network equipment, so that the network equipment can determine the CSI based on the target substrate and the reconstructed M superposition coefficients.

With reference to the first aspect, in one possible implementation manner, the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients corresponding to the target substrate, and the method further includes: and reporting bitmap indication information corresponding to the M superposition coefficients to the network equipment.

It should be understood that, after the terminal device obtains all the stacking coefficients according to the target substrate (the set formed by all the stacking coefficients is referred to as the target stacking coefficient set in this embodiment), when the terminal device reports the stacking coefficients, there may be a case that the terminal device reselects the stacking coefficients to be reported from the target stacking coefficient set.

It should be appreciated that in this case, the M stacking coefficients reported by the terminal device may be only a part of the target stacking coefficient set. Therefore, in this embodiment, when the M stacking coefficients are part of the stacking coefficients determined from the target stacking coefficient set, bitmap indication information corresponding to the M stacking coefficients is also reported to the network device, so that the network device may determine positions of the M stacking coefficients in the target stacking coefficient set based on the bitmap indication information.

With reference to the first aspect, in a possible implementation manner, the method further includes: reporting the first Discrete Fourier Transform (DFT) substrate and the first coefficient selected by the terminal equipment to the network equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate.

Specifically, in this implementation manner, when the target base may be represented by the first DFT base and the first coefficient, the terminal device reports the target base to the network device by reporting the first DFT base and the first coefficient, and accordingly, for the network device, the target base selected by the terminal device may be reconstructed based on receiving the first DFT base and the first coefficient.

With reference to the first aspect, in one possible implementation manner, the terminal device reports at least one of the following information at a starting time of the long period: target base indication information, bitmap indication information, a first DFT base, and a first coefficient.

With reference to the first aspect, in a possible implementation manner, the method further includes: receiving fourth information sent by the network device, wherein the fourth information indicates at least one of the following information: n is valued, a target grouping mode and a target codebook are adopted, and the target codebook is used for determining a target substrate by the terminal equipment.

In a second aspect, the present application provides a communication method, applied to a network device, including: receiving a group of superposition coefficients reported by a terminal device at an ith reporting time, wherein the ith reporting time is positioned after a first reporting time, the number of the superposition coefficients reported at the first reporting time is M, and i is a positive integer; and determining channel state information of the terminal equipment according to a group of superposition coefficients reported at the ith reporting time and N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time, wherein N groups of superposition coefficients formed by the group of superposition coefficients and the N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, and N is a positive integer greater than 1.

With reference to the second aspect, in one possible implementation manner, the method further includes: the first reporting time is the starting time of a long period configured by the network equipment for the terminal equipment, the long period comprises K reporting times, and the ith reporting time is any reporting time except the starting time in the K reporting times.

With reference to the second aspect, in one possible implementation manner, an index corresponding to a set of superposition coefficients received at the ith reporting time is i% N.

With reference to the second aspect, in a possible implementation manner, the method further includes: and sending grouping index indication information to the terminal equipment, wherein the grouping index indication information is used for indicating grouping indexes corresponding to a group of superposition coefficients reported at the ith reporting time.

With reference to the second aspect, in a possible implementation manner, the method further includes: receiving target substrate indication information reported by terminal equipment, wherein the target substrate indication information is used for indicating target substrates selected by the terminal equipment when the terminal equipment determines M superposition coefficients, and the target substrates comprise at least one of the following substrates: the system comprises a target airspace substrate, a target frequency domain substrate, and a substrate combining a target airspace and a frequency domain; accordingly, determining channel state information of the terminal device includes: and determining the channel state information of the terminal equipment according to the set of superposition coefficients reported at the ith reporting time and the N-1 set of superposition coefficients and the target substrate reported at least one reporting time before the ith reporting time.

With reference to the second aspect, in one possible implementation manner, the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients corresponding to the target substrate, and the method further includes: receiving bitmap indication information corresponding to M superposition coefficients reported by terminal equipment; and determining the positions of the M superposition coefficients in the target superposition coefficient set based on the bitmap indication information.

With reference to the second aspect, in a possible implementation manner, the method further includes: receiving a first DFT substrate and a first coefficient reported by terminal equipment, wherein the first DFT substrate and the first coefficient are used for representing a target substrate; a target substrate is determined based on the first DFT substrate and the first coefficient.

With reference to the second aspect, in one possible implementation manner, at least one of the target base indication information, the bitmap indication information, the first DFT base and the first coefficient is reported by the terminal device at a starting moment of the long period.

With reference to the second aspect, in a possible implementation manner, the method further includes: receiving a first bit value and second information at an ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in the group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value; or receiving a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value; correspondingly, determining the channel state information of the terminal equipment according to a group of superposition coefficients reported at the ith reporting time and N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time and the target substrate, wherein the method comprises the following steps: and determining the channel state information of the terminal equipment according to the set of superposition coefficients reported at the ith reporting time and the N-1 set of superposition coefficients reported at least one reporting time before the ith reporting time, the target substrate, the first bit value and the second information or the second bit value and the third information.

With reference to the second aspect, in one possible implementation manner, the second information includes a first amplitude value and a first phase, and the third information includes a second amplitude value and a second phase, where the first amplitude value and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude value and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

With reference to the second aspect, in a possible implementation manner, the method further includes: transmitting fourth information to the terminal device, the fourth information indicating at least one of the following information: n is valued, a target grouping mode and a target codebook are adopted, and the target codebook is used for determining a target substrate by the terminal equipment.

With reference to the second aspect, in one possible implementation manner, the network device configures information such as the number of ports of channel state information or parameter combination configuration of the target codebook only once or configures the same through signaling for a period of time.

With reference to the second aspect, in one possible implementation manner, the period of time is the same as a period of time of a long period configured by the network device for the terminal device.

In a third aspect, the present application provides a communication apparatus, applied to a terminal device, comprising: the processing module is used for determining M superposition coefficients to report to the network equipment, wherein the M superposition coefficients are used for indicating channel state information of the terminal equipment, and M is a positive integer greater than 1; the processing module is further used for dividing the M stacking coefficients into N groups of stacking coefficients, the N groups of stacking coefficients correspond to N different grouping indexes, the number of the stacking coefficients included in each group of stacking coefficients is smaller than M, and N is a positive integer larger than 1; the receiving and transmitting module is used for reporting one group of superposition coefficients in the N groups of superposition coefficients at the ith reporting time, N groups of superposition coefficients formed by the N-1 groups of superposition coefficients reported at least at one reporting time before the ith reporting time correspond to N different grouping indexes, the ith reporting time is positioned after the first reporting time, the number of superposition coefficients reported at the first reporting time is M, and i is a positive integer.

With reference to the third aspect, in one possible implementation manner, the first reporting time is a starting time of a long period configured by the network device for the terminal device, the long period includes K reporting times, and the ith reporting time is any reporting time except for the starting time in the K reporting times.

With reference to the third aspect, in one possible implementation manner, N different packet indexes are taken from 0 to N-1, and a packet index corresponding to a set of superposition coefficients reported at the ith reporting time is i% N.

With reference to the third aspect, in one possible implementation manner, the transceiver module is further configured to: and receiving packet index indicating information sent by the network equipment, wherein the packet index indicating information is used for indicating the packet index corresponding to the group of superposition coefficients reported at the ith reporting time.

With reference to the third aspect, in one possible implementation manner, the transceiver module is further configured to: transmitting a first bit value and second information at the ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in a group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value; or transmitting a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value.

With reference to the third aspect, in one possible implementation manner, the second information includes a first amplitude value and a first phase, and the third information includes a second amplitude value and a second phase, where the first amplitude value and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude value and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

With reference to the third aspect, in one possible implementation manner, n=2, and the processing module is further configured to: dividing the M superposition coefficients into N groups of superposition coefficients according to a target grouping mode; wherein the target packet mode includes any one of the following: dividing the M stacking coefficients into N groups of stacking coefficients according to the polarization directions, dividing the M stacking coefficients according to the polarization directions, arranging the stacking coefficients included in each polarization direction after division according to the sequence from big to small, dividing the stacking coefficients into N groups of stacking coefficients, and dividing the M stacking coefficients into N groups of stacking coefficients after the M stacking coefficients are not arranged according to the polarization directions according to the sequence from big to small.

With reference to the third aspect, in one possible implementation manner, the transceiver module is further configured to: reporting target substrate indication information to the network device, where the target substrate indication information is used to indicate a target substrate selected by the terminal device when the terminal device determines the M stacking coefficients, and the target substrate includes at least one substrate of: the system comprises a target airspace substrate, a target frequency domain substrate, and a target airspace and frequency domain combined substrate.

With reference to the third aspect, in one possible implementation manner, the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients corresponding to the target substrate, and the transceiver module is further configured to: and reporting bitmap indication information corresponding to the M superposition coefficients to network equipment.

With reference to the third aspect, in one possible implementation manner, the transceiver module is further configured to: reporting the first Discrete Fourier Transform (DFT) substrate and the first coefficient selected by the terminal equipment to the network equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate.

With reference to the third aspect, in one possible implementation manner, the terminal device reports at least one of the following information at a starting time of the long period: target base indication information, bitmap indication information, a first DFT base, and a first coefficient.

With reference to the third aspect, in one possible implementation manner, the transceiver module is further configured to: receiving fourth information sent by the network device, wherein the fourth information indicates at least one of the following information: and N is valued, wherein the target grouping mode and the target codebook are used for determining the target substrate by the terminal equipment.

In a fourth aspect, the present application provides a communication apparatus, applied to a network device, including: the receiving and transmitting module is used for receiving a group of superposition coefficients reported by the terminal equipment at the ith reporting time, wherein the ith reporting time is positioned after the first reporting time, the number of the superposition coefficients reported by the first reporting time is M, and i is a positive integer; the processing module is used for determining the channel state information of the terminal equipment according to a group of superposition coefficients reported at the ith reporting time and N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time, wherein N groups of superposition coefficients formed by the group of superposition coefficients and the N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, and N is a positive integer greater than 1.

With reference to the fourth aspect, in one possible implementation manner, the first reporting time is a starting time of a long period configured by the network device for the terminal device, the long period includes K reporting times, and the ith reporting time is any reporting time except the starting time in the K reporting times.

With reference to the fourth aspect, in one possible implementation manner, an index corresponding to the set of superposition coefficients received at the ith reporting time is i% N.

With reference to the fourth aspect, in a possible implementation manner, the transceiver module is further configured to: and sending grouping index indication information to the terminal equipment, wherein the grouping index indication information is used for indicating grouping indexes corresponding to a group of superposition coefficients reported at the ith reporting time.

With reference to the fourth aspect, in a possible implementation manner, the transceiver module is further configured to: receiving target substrate indication information reported by terminal equipment, wherein the target substrate indication information is used for indicating target substrates selected by the terminal equipment when the terminal equipment determines M superposition coefficients, and the target substrates comprise at least one of the following substrates: the system comprises a target airspace substrate, a target frequency domain substrate, and a substrate combining a target airspace and a frequency domain; correspondingly, the processing module is specifically configured to: and determining the channel state information of the terminal equipment according to the set of superposition coefficients reported at the ith reporting time and the N-1 set of superposition coefficients and the target substrate reported at least one reporting time before the ith reporting time.

With reference to the fourth aspect, in one possible implementation manner, the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients corresponding to the target substrate, and the transceiver module is further configured to: receiving bitmap indication information corresponding to the M superposition coefficients reported by the terminal equipment; the processing module is further configured to: and determining the positions of the M superposition coefficients in the target superposition coefficient set based on the bitmap indication information.

With reference to the fourth aspect, in a possible implementation manner, the transceiver module is further configured to: receiving a first Discrete Fourier Transform (DFT) substrate and a first coefficient reported by the terminal equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate; the processing module is further configured to: a target substrate is determined based on the first DFT substrate and the first coefficient.

With reference to the fourth aspect, in one possible implementation manner, at least one of the target base indication information, the bitmap indication information, the first DFT base and the first coefficient is reported by the terminal device at a starting moment of the long period.

With reference to the fourth aspect, in a possible implementation manner, the transceiver module is further configured to: receiving a first bit value and second information at an ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in the group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value; or receiving a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value; correspondingly, the processing module is further configured to: and determining the channel state information of the terminal equipment according to the set of superposition coefficients reported at the ith reporting time and the N-1 set of superposition coefficients reported at least one reporting time before the ith reporting time, the target substrate, the first bit value and the second information or the second bit value and the third information.

With reference to the fourth aspect, in one possible implementation manner, the second information includes a first amplitude value and a first phase, and the third information includes a second amplitude value and a second phase, where the first amplitude value and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude value and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

With reference to the fourth aspect, in a possible implementation manner, the transceiver module is further configured to: transmitting fourth information to the terminal device, the fourth information indicating at least one of the following information: n is valued, a target grouping mode and a target codebook are adopted, and the target codebook is used for determining a target substrate by the terminal equipment.

With reference to the fourth aspect, in one possible implementation manner, the network device configures information such as the number of ports of channel state information or parameter combination configuration of the target codebook only once or configures the same through signaling for a period of time.

With reference to the fourth aspect, in one possible implementation manner, the duration of a period is the same as the duration of a long period configured by the network device for the terminal device.

In a fifth aspect, the present application provides a communication system comprising the apparatus of the third aspect and the fourth aspect.

In a sixth aspect, the present application provides a communication apparatus comprising: a memory and a processor; the memory is used for storing program instructions; the processor is configured to invoke program instructions in the memory to perform the method according to the first aspect or any of the possible implementations thereof.

In a seventh aspect, the present application provides a communication apparatus comprising: a memory and a processor; the memory is used for storing program instructions; the processor is configured to invoke program instructions in the memory to perform the method according to the second aspect or any of the possible implementations thereof.

In an eighth aspect, the present application provides a computer readable medium storing program code for computer execution, the program code comprising instructions for performing the method of any one of the first to second aspects or any one of the possible implementations thereof.

In a ninth aspect, the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to carry out the method according to any one of the first to second aspects or any one of the possible implementations thereof.

Drawings

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

Fig. 2 is a schematic architecture diagram of a communication system according to another embodiment of the present application;

FIG. 3 is a schematic flow chart of a communication method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a time-sharing reporting method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to another embodiment of the present application.

Detailed Description

In order to better understand the technical solution of the embodiments of the present application, some concepts used in the embodiments of the present application will be briefly described.

1. Reference signal

The reference signal is a known signal provided by the transmitting end to the receiving end for estimating or detecting the radio channel information. According to a protocol of long term evolution LTE/NR, at a physical layer, uplink communication and downlink communication are included, wherein the uplink communication includes transmission of an uplink physical channel and an uplink reference signal, and the downlink communication includes transmission of a downlink physical channel and a downlink reference signal.

Among them, the uplink physical channels include a random access channel (PRACH), an uplink control channel (physical uplink control channel, PUCCH), an uplink data channel (physical uplink SHARED CHANNEL, PUSCH), and the like. The downlink physical channels include broadcast channels (physical broadcast channel, PBCH), downlink control channels (physical downlink control channel, PDCCH), downlink data channels (physical downlink SHARED CHANNEL, PDSCH), and the like.

The uplink reference signal refers to a reference signal sent from a terminal device to a Base Station (BS) or a multiple transmission AND RECEIVING point (TRP), that is, the transmitting end is the terminal device, and the receiving end is the BS or the TRP. Illustratively, the uplink reference signals include a channel Sounding REFERENCE SIGNAL (SRS), a demodulation reference signal (de-modulation REFERENCE SIGNAL, DMRS) of an uplink control channel, a demodulation reference signal (PUSCH-DMRS) of an uplink data channel, an uplink phase noise tracking reference signal (phase noise TRACKING REFERENCE SIGNAL, PTRS), an uplink positioning signal, and so on.

The downlink reference signal refers to a reference signal sent from a BS or TRP to a terminal device, that is, a transmitting end is the BS or TRP, and a receiving end is the terminal device. Illustratively, the downlink reference signals include a primary synchronization signal (primary synchronization signal, abbreviated PSS)/secondary synchronization signal (secondary synchronization signal, SSS), a demodulation reference signal (PDCCH-DMRS) of a downlink control channel, a demodulation reference signal (PDSCH-DMRS) of a downlink data channel, a phase noise tracking signal, a channel state information reference signal (channel status information REFERENCE SIGNAL, CSI-RS), a cell signal (CELL REFERENCE SIGNAL, CRS) (NR not), a fine synchronization signal (time/frequency TRACKING REFERENCE SIGNAL, TRS) (LTE not), an LTE/NR positioning signal (positioning RS), and the like.

2. Multiple input multiple output technique

The multiple-output (multiple input multiple output, MIMO) technology refers to using multiple transmit antennas and receive antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted and received through the multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. MIMO technology is a typical application of multi-antenna technology, which can fully utilize spatial resources, realize multiple transmission and multiple reception through multiple antennas, and can doubly increase the channel capacity of a system without increasing spectrum resources and antenna transmission power.

The embodiments of the present application provide a communication method and a communication device, where the method and the device are based on the same technical concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is omitted.

The technical scheme provided by the embodiment of the application can be applied to various communication systems. For example, the applied communication system may be a global system for mobile communications (global system of mobile communication, GSM), a code division multiple access (code dividion multiple access, CDMA) system, wideband code division multiple access (wideband radio service, GPRS), a long term evolution (long term evolution, LTE) system, a long term evolution advanced (LTE ADVANCED, LTE-a), a LTE frequency division duplex (frequency division duplex, FDD) system, a LTE time division duplex (time division duplex, TDD) system, a universal mobile telecommunications system (universal mobile telecommunication system, UMTS), and other wireless communication systems employing orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) techniques, etc.

The following is a schematic diagram illustrating a communication system to which the communication method provided by the present application may be applied.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system may include at least one network device, such as network device 101 shown in fig. 1; the communication system may further comprise at least one terminal device, such as terminal device 102, terminal device 103, terminal device 104 and terminal device 105 shown in fig. 1. Each communication device, such as the network device 101 or each terminal device, may be configured with a plurality of antennas, which may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals.

As shown in fig. 1, in this communication system, there may be two communication scenarios: the first communication scenario includes communication between a terminal device and a network device, for example, communication between any one of the terminal devices 102 and the network device 101. In a second communication scenario, communication between terminal devices, such as communication between terminal device 104 and terminal device 105, is included. The link between the terminal devices and the communication between the terminal devices is referred to as a side-link, and the terminal device 104 and the terminal device 105 can transmit data on the side-link.

Specifically, the network device 101 in the present application may be any device having a wireless transceiving function. The apparatus includes, but is not limited to: an evolved NodeB (eNB or eNodeB), a radio network controller (radio network controller, RNC), a NodeB (Node B, NB), a base station controller (base stationcontroller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., homeevolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIRELESS FIDELITY, WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and receptionpoint, TRP), etc., may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP, TP), one or a group of base stations (including multiple antenna panels) antenna panels in a 5G system, or may also be a network Node constituting a gNB or transmission point, e.g., a baseband unit (BBU) or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a centralized unit (centralized unit, CU) and DUs. The gNB may also include a Radio Unit (RU). The CU implements part of the functions of the gNB, the DU implements part of the functions of the gNB, for example, the CU implements functions of a radio resource control (radio resource control, RRC), a packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer, and the DU implements functions of a radio link control (radio link control, RLC) layer, a medium access control (MEDIA ACCESS control, MAC) layer, and a Physical (PHY) layer. Since the information of the RRC layer may be eventually changed into or converted from the information of the physical layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+cu. It is understood that the network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CUs may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a core network (corenetwork, CN), which is not limited by the present application.

Specifically, the terminal device in the present application may be a device that provides voice and/or data connectivity to a user, for example, a handheld device having a wireless connection function, an in-vehicle device, or the like. The terminal device may also be referred to as a User Equipment (UE), an access terminal (ACCESS TERMINAL), a user unit (user unit), a subscriber station (user station), a mobile station (mobile station), a remote station (remote station), a remote terminal (remote terminal), a mobile device (mobile device), a user terminal (user terminal), a wireless communication device (wireless telecom equipment), a user agent (user agent), a user equipment (user equipment), or a user equipment. The terminal device may be a Station (STA) in a wireless local area network (wireless local Area networks, WLAN), may be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a next generation communication system (e.g., a fifth generation (fifth-generation, 5G) communication network) or a terminal device in a future evolution public land mobile network (public land mobile network, PLMN) network, etc. Wherein 5G may also be referred to as a New Radio (NR). In a possible application scenario of the present application, the terminal device may also be a terminal device that is often operated on the ground, such as a vehicle-mounted device. In the present application, for convenience of description, a chip disposed in the above-described device, or a chip may also be referred to as a terminal device.

In the embodiment of the application, the two terms of the terminal equipment and the UE can be interchanged, and the two terms of the base station and the network equipment can also be interchanged.

In the application, the network equipment and the terminal equipment can communicate through the authorized spectrum, can also communicate through the unlicensed spectrum, and can also communicate through the authorized spectrum and the unlicensed spectrum at the same time. The network device and the terminal device may communicate with each other through a frequency spectrum of 6 Gigahertz (GHZ) or less, may communicate through a frequency spectrum of 6GHZ or more, and may communicate using a frequency spectrum of 6GHZ or less and a frequency spectrum of 6GHZ or more at the same time. The embodiment of the application does not limit the frequency spectrum resources used between the network equipment and the terminal equipment.

It will be appreciated that the number of terminal devices shown in fig. 1 is only one example. The number of terminal devices in the actual process may also be other numbers. Of course, the communication system may also comprise other network elements, for example core network devices, to which the network devices may be connected. It is described herein that the specific forms of the network device and the terminal device in the embodiments of the present application are not limited.

It should be noted that in an embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided by the embodiment of the present application, as long as communication can be performed by the method provided according to the embodiment of the present application by running a program in which the code of the method provided by the embodiment of the present application is recorded. For example, the execution body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call a program and execute the program.

Additionally, the methods of the various aspects of the application may be implemented using programming and form a computer readable device, carrier, or media accessed computer program. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk, DIGITAL VERSATILE DISC, DVD, etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory, EPROM), cards, sticks, key drives, etc. Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

It should be noted that, the network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided by the embodiments of the present application is equally applicable to similar technical problems.

In addition, the communication method of the present application can be applied to a communication system architecture in which a plurality of network devices serve the same terminal device, in addition to the communication system architecture shown in fig. 1. As shown in fig. 2, in the communication system architecture, the network device 201 and the network device 202 may serve the same terminal device 203 at the same time. The concepts related to the network device and the terminal device may refer to the descriptions of the related parts, which are not repeated herein.

Currently, with higher demands on system capacity, spectrum efficiency, and the like of a communication system, a multiple input multiple output (multiple input multiple output, MIMO) technology plays a crucial role in the spectrum efficiency of the system. In the present application, the MIMO technology may be also referred to as a multi-antenna technology, and a communication system using the MIMO technology may be also referred to as a MIMO system.

With the communication system architecture shown in fig. 1 or fig. 2, when the network device transmits data to the terminal device in the case of adopting the MIMO technology, modulation coding and precoding are required. However, how to perform modulation coding and precoding specifically by the network device needs to rely on Channel State Information (CSI) reported by the terminal device.

Specifically, the basic flow of CSI measurement performed by the network device and the terminal device includes:

Step one: the network equipment sends signaling to the terminal equipment for configuration of channel measurement so as to inform the terminal equipment of time and behavior for channel measurement;

Step two, the network equipment sends a downlink reference signal to the terminal equipment;

Step three: the terminal equipment obtains Channel State Information (CSI) based on a downlink reference signal;

step three: and the terminal equipment reports the CSI to the network equipment.

At present, when the terminal equipment reports the CSI to the network, the target substrate of the downlink channel can be utilized to carry out sparse representation on the downlink channel so as to fully mine the sparse characteristic of the downlink channel, thereby reducing the feedback overhead of the CSI. Wherein the target substrate may comprise one or more of the following substrates: spatial domain base, frequency domain base, and space-frequency joint base. A common target substrate is a DFT substrate. Optionally, in order to fully utilize the sparsity of the channel in the spatial domain and further improve the accuracy of PMI feedback, the linear combination of the feature space bases of long-period statistics may be utilized to approximate the downlink channel or the main feature vector of the downlink channel, where the target base is the feature space base.

Specifically, after the terminal device obtains the precoding information or the downlink channel information according to the downlink reference signal, if the target substrate selected by the terminal device is a DFT substrate, the terminal device only needs to report the superposition coefficients corresponding to the target substrate (which may be all the superposition coefficients or part of the superposition coefficients in all the superposition coefficients) to the network device in the reporting period.

Specifically, after the terminal device obtains the precoding information or the downlink channel information according to the downlink reference signal, if the target substrate selected by the terminal device is the feature space substrate, the terminal device needs to report the selected feature space substrate for a long period and report the superposition coefficients (may be all the superposition coefficients or part of the superposition coefficients in all the superposition coefficients) corresponding to the target substrate to the network device in the reporting period.

Specifically, assuming that the terminal device is a single antenna, the number of antennas at the network device side is N _t, and the number of frequency domain units is N _f, the reconstructed downlink channel information H _dl may be expressed as:

H_dl＝SC₂F^H

Wherein, S, F represent the spatial and frequency domain basis, respectively, and S, F may be the DFT basis or the feature space basis.

When the space domain substrate is a feature space substrate,Representing that the airspace substrate is obtained by reconstructing the substrate S' (such as DFT substrate) reported by a long period and the long period coefficient C ₁, which is the approximation of the downlink airspace characteristic space substrate;

when the frequency domain basis is a feature space basis, The frequency domain base obtained by reconstructing the base F' (such as DFT base) reported by long period and the long period coefficient C ₃ is approximate to the downlink frequency domain characteristic space base;

representing the combined coefficients (i.e., the superposition coefficients) of the spatial and frequency domain bases.

Or the downlink channel information H _dl may be expressed as:

H_dl＝S₁C₅

At this time S ₁ represents a space-frequency joint basis, and S ₁ may be a DFT basis or a feature space basis.

When the space-frequency joint substrate is a feature space substrate,The space-frequency joint substrate obtained by reconstructing a substrate S ₁' (such as a DFT substrate) reported in a long period and a long period coefficient C ₄ is shown and is an approximation to a downlink airspace frequency domain characteristic space substrate;

It should be noted that the reporting period of S', C ₁,F′,C₃ or S ₁′,C₄ is long, e.g. every 300 ms, while the reporting period of C ₂ or C ₅ is short, e.g. every 5 ms.

However, in the above method, as the MIMO system evolves toward a larger antenna scale, for example, 64TRx, in order to ensure CSI reporting accuracy, a terminal device needs to report more superposition coefficients at each reporting time, so that there is a problem that the reporting CSI overhead is large.

In view of this, the embodiments of the present application provide a communication method and a communication device, which can ensure the accuracy of reporting CSI and reduce the feedback overhead of CSI.

Fig. 3 is a communication method according to an embodiment of the present application. As shown in fig. 3, the method may include: s301, S302, S303, and S304.

S301, M superposition coefficients are determined to be reported to the network equipment, wherein the M superposition coefficients are used for indicating channel state information of the terminal equipment, and M is a positive integer greater than 1.

In general, after determining channel state information of a downlink channel between a terminal device and a network device based on a downlink reference signal sent by the network device, the terminal device needs to report CSI to the network device. The downlink reference signal may be, for example, a channel state information reference signal (CHANNEL STATE information-REFERENCE SIGNAL, CSI-RS).

In a current implementation, when the terminal device reports CSI to the network device, the terminal device needs to report a superposition coefficient (or called a combining coefficient, a linear combining coefficient) to the network device, where the superposition coefficient is obtained by using a target substrate selected by the terminal device (the target substrate includes at least one substrate selected from a target airspace substrate, a target frequency domain substrate, a target airspace and frequency domain combined substrate). Correspondingly, for the network device, determining the CSI (also referred to as reconstructing CSI) based on the superposition coefficient reported by the terminal device and the target substrate.

In the application, the reported superposition coefficient is also called as the superposition coefficient obtained when the CSI is projected to the target substrate.

In a specific implementation, in order to enable the terminal device to use the method provided by the application, the network device may configure a target codebook for the terminal device through signaling, where the target codebook may be used for determining a target base by the terminal device. The network device may configure the target codebook for the terminal device by radio resource control (radio resource control, RRC) signaling, or a media-intervening control-element (MAC-CE), or downlink control information (downlink control information, DCI), for example.

In this embodiment, when determining to report M stacking coefficients to the network device, in the first scenario, the M stacking coefficients are all stacking coefficients obtained when the terminal device shadows the precoding information or the downlink channel information obtained based on the downlink reference signal to the target substrate. In other words, in the first scenario, all the superposition coefficients obtained by the terminal device based on the target substrate are superposition coefficients that need to be reported.

In this embodiment, when determining that M stacking coefficients are reported to the network device, in the second scenario, the M stacking coefficients are part of stacking coefficients determined in a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients that the terminal device will obtain based on a target substrate. In other words, in this second scenario, after obtaining all the superimposition coefficients based on the target substrate, the terminal device reports only M superimposition coefficients (the M superimposition coefficients are only a part of all the superimposition coefficients) out of the all the superimposition coefficients to the network device.

It should be understood that, in this second scenario, that is, when the M stacking coefficients are only a part of all stacking coefficients, the terminal device needs to report bitmap indication information corresponding to the M stacking coefficients to the network device, so that the network device determines the positions of the M stacking coefficients in all stacking coefficients based on the bitmap indication information. Alternatively, the terminal device may report the bitmap indication information to the network device at the start of a long period for which the network device is configured.

S302, dividing M stacking coefficients into N groups of stacking coefficients, wherein the N groups of stacking coefficients correspond to N different grouping indexes, and the number of stacking coefficients included in each group of stacking coefficients is smaller than M.

The value of N may be agreed in advance by the network device and the terminal device through a protocol, or may be configured by the network device through signaling (e.g. RRC, MAC-CE, or DCI).

In this embodiment, after determining that M stacking coefficients need to be reported, the terminal device divides the M stacking coefficients into N groups of stacking coefficients, where the number of stacking coefficients included in each group of stacking coefficients in the divided N groups of stacking coefficients is less than M, and each group of stacking coefficients corresponds to one index and different indexes corresponding to different stacking coefficients.

Here, in the present embodiment, when M stacking coefficients are divided into N groups of stacking coefficients, the specific division form is not limited as long as the N groups of stacking coefficients correspond to N different group indexes. For example, the M superimposition coefficients may be uniformly divided into N sets of superimposition coefficients, or may be unevenly divided into N sets of superimposition coefficients.

For example, assuming that M is equal to 64 and n is equal to 2, when the 64 superimposition coefficients are divided into 2 sets of superimposition coefficients (the first set of superimposition coefficients corresponds to the group index 0 and the 2 nd set of superimposition coefficients corresponds to the group index 1), the number of superimposition coefficients included in the 2 sets of superimposition coefficients is 32 (uniform division).

For example, assuming that M is equal to 64 and n is equal to 2, when 64 superimposition coefficients are divided into 2 sets of superimposition coefficients (the first set of superimposition coefficients corresponds to the group index 0 and the 2 nd set of superimposition coefficients corresponds to the group index 1), the number of superimposition coefficients included in one set of superimposition coefficients in the 2 sets of superimposition coefficients is 30, and the number of superimposition coefficients included in the other set of superimposition coefficients is 34 (uneven division).

Alternatively, when N is equal to 2, the M superimposition coefficients may be divided into N groups of superimposition coefficients according to the target grouping mode. Wherein the target packet mode includes any one of the following:

1) The M superposition coefficients are divided into N groups of superposition coefficients according to the polarization direction.

That is, the terminal device divides the M superimposition coefficients into 2 sets of superimposition coefficients. It should be appreciated that the 2 sets of superposition coefficients correspond to 2 grouping indexes.

2) Dividing M superposition coefficients according to polarization directions, and dividing the superposition coefficients included in each polarization direction into N groups of superposition coefficients after the superposition coefficients are arranged in sequence from large to small.

For example, if a total of 64 stacking coefficients need to be reported and the stacking coefficients need to be reported in 2 reporting moments, the terminal device may divide the 64 stacking coefficients according to polarization directions, assume that 32 stacking coefficients exist in each polarization direction after division, then arrange the 32 stacking coefficients included in each polarization direction after division according to a sequence from large to small, and if the indexes of the stacking coefficients included in each polarization direction are 1 to 32, then divide the stacking coefficients corresponding to index values 0, 2,4 … … in the 2 polarization directions into one group of stacking coefficients, and then divide the stacking coefficients corresponding to index values 1, 3, 5 … … 31 in the two polarization directions into another group of stacking coefficients.

3) The M superposition coefficients are not arranged in order from large to small according to the polarization direction and then are divided into N groups of superposition coefficients.

For example, if a total of 64 stacking coefficients need to be reported and reported at 2 reporting moments, the terminal device may arrange the 64 stacking coefficients in order from large to small and then divide the 64 stacking coefficients into 2 groups of stacking coefficients, for example, where the stacking coefficients included in one group of stacking coefficients have index values of 0,2, 4 … … 62 and the stacking coefficients included in the other group of stacking coefficients have index values of 1,3, 5 … ….

Alternatively, the target packet mode may be agreed in advance by the network device and the terminal device through a protocol, or may be configured by the network device through signaling (e.g., RRC, MAC-CE, or DCI).

S303, reporting one set of superposition coefficients in N sets of superposition coefficients at the ith reporting time, wherein N sets of superposition coefficients formed by the one set of superposition coefficients and N-1 sets of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, the ith reporting time is positioned after the first reporting time, the number of superposition coefficients reported at the first reporting time is M, and i is a positive integer; accordingly, the network device receives a set of superposition coefficients reported by the terminal device at the ith reporting time.

In this embodiment, based on the characteristic that the stacking coefficients reported at different reporting moments have correlation in time, when the terminal device determines that M stacking coefficients need to be reported based on the target substrate, and divides the M stacking coefficients into N groups of stacking coefficients, the terminal device only reports one group of stacking coefficients in the N groups of stacking coefficients at each reporting moment (i.e., only reports part of stacking coefficients in the M stacking coefficients at each reporting moment), and then all reports the N groups of stacking coefficients to the network device through the N reporting moments, so that the network device obtains the M stacking coefficients. For example, when N is equal to 2, as shown in fig. 4, the terminal device may divide M stacking coefficients into two groups of C ₁ and C ₂, where the number of stacking coefficients included in each group is smaller than M, and then the terminal device may report the stacking coefficient in C ₁ but not the stacking coefficient in C ₂ when reporting time t ₁, and report the stacking coefficient in C ₂ but not the stacking coefficient in C ₁ when reporting time t ₂; then, when the time t ₃ is reported, the superposition coefficient in the C ₁ is reported but the superposition coefficient in the C ₂ is not reported, and when the time t ₄ is reported, the superposition coefficient in the C ₂ is reported but the superposition coefficient in the C ₁ is not reported; and then, when time t ₅ is reported again, reporting the superposition coefficients in C ₁ but not in C ₂, when time t ₆ is reported, reporting the superposition coefficients in C ₂ but not in C ₁, and so on.

Optionally, in this embodiment, when the terminal device reports all N sets of superposition coefficients to the network device based on N reporting moments, a set of superposition coefficients reported at each reporting moment of the N reporting moments is obtained based on CSI RS measurement at the current reporting moment. That is, when N sets of superposition coefficients are reported using N reporting times, the terminal device may perform N CSI RS measurements.

Optionally, in this embodiment, when the terminal device reports all N sets of superposition coefficients to the network device based on N reporting moments, a set of superposition coefficients reported at each reporting moment of the N reporting moments may not be obtained based on CSI RS measurement at the current reporting moment. That is, when N sets of superposition coefficients are reported using N reporting times, the number of CSI RS measurements performed by the terminal device may be less than N.

Specifically, in this embodiment, when the terminal device reports only one set of superposition coefficients in the N sets of superposition coefficients at the i-th reporting time, the N sets of superposition coefficients formed by the reported one set of superposition coefficients and the N-1 sets of superposition coefficients reported at least one reporting time before the i-th reporting time correspond to N different grouping indexes, and the i-th reporting time is located after the first reporting time.

The first reporting time refers to reporting times of reporting the M stacking coefficients.

In the implementation, the first reporting time is a starting time of a long period configured by the network device for the terminal device.

It should be appreciated that a reporting time period including a plurality of reporting superposition coefficients in a long period, for example, includes K reporting times, and then the i-th reporting time may be any reporting time period except the start time in the K reporting times.

The starting time of the long period may be the starting time of the first long period (i.e., the actual starting time), or the starting time of each long period. For example, assuming that the long period configured by the network device for the terminal device is 300ms, the start time of the long period may be the start time of the first 300ms, or the start time of each 300ms, or the like.

More specifically, in this embodiment, when the terminal device reports only one set of stacking coefficients in the N sets of stacking coefficients at the i-th reporting time, in one possible implementation manner, the terminal device may take the grouping index of the divided N sets of stacking coefficients from 0 to N-1, and then report the grouping index as the i% N set of stacking coefficients at the i-th reporting time.

As an example, assuming that M superposition coefficients are divided into 2 groups, a first group of superposition coefficients may be corresponding to group index 0, and a second group of superposition coefficients may be corresponding to group index 1. At this time, if the i-th reporting time is the 3-th reporting time, the reported set of superimposition coefficients is the second set of superimposition coefficients with the grouping index value of 3%2=1, and if the i-th reporting time is the 4-th reporting time, the reported set of superimposition coefficients is the first set of superimposition coefficients with the grouping index value of 4%2 =0.

As another example, assuming that M stacking coefficients are divided into 3 groups, a first group of stacking coefficients may be corresponding to group index 0, a second group of stacking coefficients may be corresponding to group index 1, and a third group of stacking coefficients may be corresponding to group index 2. At this time, if the i-th reporting time is the 5-th reporting time, the reported set of superimposition coefficients is the third set of superimposition coefficients with the group index value of 5%3 =2, and if the i-th reporting time is the 6-th reporting time, the reported set of superimposition coefficients is the first set of superimposition coefficients with the group index value of 6%3 =0.

S304, the network equipment determines the channel state information of the terminal equipment according to a group of superposition coefficients reported at the ith reporting time and N-1 groups of superposition coefficients reported at least at one reporting time before the ith reporting time.

In this embodiment, when the terminal device reports only one set of superposition coefficients in the N sets of superposition coefficients at each reporting time (that is, only reports part of superposition coefficients in the M superposition coefficients), for the network device, it is required to reconstruct the M superposition coefficients according to the set of superposition coefficients reported by the terminal device at the i-th reporting time and the N-1 sets of superposition coefficients reported by at least one reporting time before the i-th reporting time, and then determine channel state information of the terminal device according to the reconstructed M superposition coefficients.

Illustratively, fig. 4 is used as an example. When the terminal device reports M stacking coefficients to the network device by reporting the stacking coefficient C ₁ at one reporting time and reporting the stacking coefficient C ₂ at another reporting time, for the network device, CSI cannot be determined according to the stacking coefficient reported at each reporting time, and CSI should be reconstructed by the stacking coefficient reported at the current reporting time and the stacking coefficient reported at the previous reporting time adjacent to the current reporting time. For example, when the current time is the reporting time t ₃, then the network device may determine M stacking coefficients through the stacking coefficient reported by the terminal device at the reporting time t ₃ and the stacking coefficient reported by the terminal device at the reporting time t ₂, and reconstruct CSI based on the M stacking coefficients. For another example, when the current time is the reporting time t ₄, then the network device may determine M stacking coefficients by using the stacking coefficient reported by the terminal device at the reporting time t ₄ and the stacking coefficient reported by the terminal device at the reporting time t ₃, and reconstruct CSI based on the M stacking coefficients.

Specifically, in this embodiment, when the network device reconstructs M stacking coefficients according to a set of stacking coefficients reported by the terminal device at the i-th reporting time and N-1 sets of stacking coefficients reported at least one reporting time before the i-th reporting time, there are two cases:

1) First case: i is less than N-1.

It is understood that in this case, there is a problem in that the number of sets of superimposition coefficients to be reported in total from the 1 st reporting time (first reporting time after the start time of the long period) to the i-th reporting time is smaller than N-1 sets. Therefore, in this embodiment, when i < N-1, the network device reconstructs M superposition coefficients according to the following formula:

wherein, the feedback frequency index of the superposition coefficient is indicated in the bracket (the feedback frequency index corresponding to the starting time of the long period is 0), and the subscript of C indicates the corresponding grouping index.

Illustratively, assuming that M is equal to 64 and n is equal to 2, the 64 stacking coefficients may be divided into two groups, and a first group of stacking coefficients of the two groups corresponds to group index 0 and a second group of stacking coefficients corresponds to group index 1. In this case, if the i-th reporting time is the 1 st reporting time, the network device may determine that the group index corresponding to the group of stacking coefficients reported by the terminal device at the current 1 st reporting time is 1% 2=1, then acquire the group of stacking coefficients with the group index of 0 from the long period starting time (reporting 64 stacking coefficients), and then reconstruct 64 stacking coefficients by using the group of stacking coefficients with the group index of 0 as the first group of stacking coefficients and the group of stacking coefficients reported at the current 1 st reporting time as the second group of stacking coefficients.

2) Second case: i is not less than N-1.

Specifically, for the network equipment, when i is not less than N-1, coefficient reconstruction can be performed according to the i-th reporting time and the superposition coefficients reported at the N-1 reporting times before the i-th reporting time. Specifically, when coefficient reconstruction is performed according to the i-th reporting time and the superposition coefficients reported at the N-1 reporting times before the i-th reporting time, a grouping index corresponding to a group of superposition coefficients reported at each of the i-th reporting time and the N-1 reporting times before the i-th reporting time can be determined first, and then the N groups of superposition coefficients reported at the i-th reporting time and the N-1 reporting times before the i-th reporting time are arranged according to the order of grouping indexes from 0 to N-1, so that the M superposition coefficients are reconstructed.

Illustratively, assuming that M is equal to 64 and n is equal to 2, the 64 stacking coefficients may be divided into two groups, and a first group of stacking coefficients of the two groups corresponds to group index 0 and a second group of stacking coefficients corresponds to group index 1. In this case, if the i-th period reporting time is the 4-th period reporting time, the network device may determine that the packet index corresponding to the set of superposition coefficients reported by the terminal device at the current 4-th period reporting time is 4%2 =0, then determine that the packet index corresponding to the set of superposition coefficients reported by the 3-th period reporting time is 3%2=1, and then use the set of superposition coefficients reported by the 4-th period reporting time with the packet index of 0 as the first set of superposition coefficients and use the set of superposition coefficients reported by the 3-th period reporting time with the packet index of 1 as the second set of superposition coefficients, thereby reconstructing 64 superposition coefficients.

Optionally, at the ith reporting time, the network device may further send packet index indication information to the terminal device, where the packet index indication information is used to indicate a packet index corresponding to a set of superposition coefficients that needs to be reported by the terminal device at the ith reporting time; correspondingly, the terminal equipment receives the grouping index indication information, and reports a group of superposition coefficients corresponding to the grouping index indicated by the grouping index indication information to the network equipment at the ith reporting time.

Further, in this embodiment, after the network device reconstructs the M stacking coefficients, CSI corresponding to the i-th reporting time of the terminal device may be determined based on the M stacking coefficients.

Specifically, when the network device determines CSI corresponding to the terminal device at the ith reporting time based on the M stacking coefficients, the method includes: receiving target substrate indication information sent by terminal equipment, wherein the target substrate indication information is used for indicating target substrates selected by the terminal equipment when the terminal equipment determines M superposition coefficients, and the target substrates comprise at least one substrate selected from the following: the system comprises a target airspace substrate, a target frequency domain substrate, and a substrate combining a target airspace and a frequency domain; and then determining the CSI corresponding to the ith reporting time of the terminal equipment according to the target substrate and the reconstructed M superposition coefficients.

In one example, if the target substrate selected by the terminal device is a DFT substrate, the terminal device transmits target substrate indication information for indicating the selected DFT substrate to the network device. Correspondingly, for the network device, a DFT substrate selected by the terminal device can be determined based on the target substrate indication information, and then CSI corresponding to the i-th reporting time of the terminal device is obtained by using the DFT substrate and the reconstructed M superposition coefficients.

In another example, if the target substrate selected by the terminal device is a feature space substrate, for example, a target spatial substrate, or a target frequency domain substrate, or a combination of target spatial and frequency domain substrate is selected, the terminal device sends target substrate indication information for indicating the selected feature space substrate to the network device, and sends a first DFT substrate and a first coefficient selected by the terminal device to the network device, wherein the first DFT substrate and the first coefficient are used to represent the feature space substrate selected by the terminal device. Correspondingly, for the network equipment, a characteristic space substrate selected by the terminal equipment is obtained according to the first DFT substrate and the first coefficient, and then CSI corresponding to the ith reporting time of the terminal equipment is obtained by using the characteristic space substrate and the reconstructed M superposition coefficients.

In a specific implementation, the terminal device may report the target base indication information, the DFT base, and the first coefficient to the network device at a start time of the long period.

It can be understood that in the prior art, when the terminal device determines the channel state information based on the downlink reference signal and obtains M stacking coefficients corresponding to the channel state information after being projected to the selected target substrate, the M stacking coefficients are reported at each reporting time, and accordingly, the network device obtains CSI based on the M stacking coefficients reported at each reporting time. In this embodiment, when the terminal device determines to report M stacking coefficients to the network device, the M stacking coefficients are divided into N groups of stacking coefficients, where the N groups of stacking coefficients correspond to N different grouping indexes, and each group of stacking coefficients includes stacking coefficients less than M, and then only one group of stacking coefficients in the N groups of stacking coefficients is reported at each reporting time, that is, only part of stacking coefficients in the M stacking coefficients are reported at each reporting time.

In other words, in this embodiment, when the terminal device determines to report M stacking coefficients to the network device, instead of reporting M stacking coefficients at each reporting time, the M stacking coefficients are reported through N reporting times (also referred to as a time-sharing reporting manner).

It can be understood that the superposition coefficients reported at different reporting moments may have correlation in time, so that the terminal device in this embodiment reports part of the superposition coefficients through each reporting moment, and then uses N reporting moments to report the M superposition coefficients, which not only can ensure the accuracy of reporting CSI, but also can reduce the cost of reporting CSI.

In addition, it should be further understood that, as the number of antennas increases, more superposition coefficients need to be reported to ensure the accuracy of reporting CSI, and at this time, if all superposition coefficients are reported at each reporting time in the prior art, the problem of increasing the cost of reporting CSI is inevitably brought. In this embodiment, even when more superposition coefficients need to be fed back, based on the time correlation characteristics of superposition coefficients reported at different reporting moments, the terminal device may report in a time-sharing manner, and report part of the superposition coefficients each time, so that the cost of reporting CSI can be reduced while ensuring the accuracy of reporting CSI.

As an optional embodiment, in general, when the terminal device feeds back a plurality of superposition coefficients to be reported through a reporting time, the terminal device normalizes the plurality of superposition coefficients to be reported and then reports the normalized superposition coefficients, which is also referred to as taking the maximum amplitude value in the plurality of superposition coefficients as a baseline in reporting.

In the time-sharing reporting mode of the present application, the network device needs to combine N groups of stacking coefficients reported at N reporting moments, so in this embodiment, the terminal device may further send a first bit value and second information to the network device when reporting at the i-th moment, where the first bit value indicates that the first maximum value is greater than the second maximum value, the first maximum value is the amplitude of a first stacking coefficient in M stacking coefficients reported at the first reporting moment (i.e. the starting moment of a long period), the first stacking coefficient is the stacking coefficient with the largest amplitude in M stacking coefficients reported at the first reporting moment, the second maximum value is the amplitude of a second stacking coefficient in a group of stacking coefficients reported at the i-th moment, and the second stacking coefficient is the stacking coefficient with the largest amplitude in a group of stacking coefficients reported at the i-th moment, and the second information indicates the ratio of the second maximum value to the first maximum value; or transmitting a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating the ratio of the first maximum value to the second maximum value.

Optionally, the second information includes a first amplitude and a first phase, and the third information includes a second amplitude and a second phase, where the first amplitude and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

Illustratively, in a first implementation: c (0) _max＞C(t)_max is represented by a first bit value of bit 1, this time forQuantifying and reporting; c (0) _max≤C(t)_max is represented by a second bit value of bit 0, at which time pair/>And quantifying and reporting. Where C (0) _max represents the magnitude of the first superposition coefficient and C (t) _max represents the magnitude of the second superposition coefficient.

For another example, in a second embodiment: c (0) _max＞C(t)_max is represented by a first bit value of bit 0, this time forQuantifying and reporting; c (0) _max≤C(t)_max is represented by a second bit value of bit 1, forAnd quantifying and reporting.

Correspondingly, in this embodiment, for the network device, at the ith reporting time, channel state information of the terminal device is determined according to a set of superposition coefficients reported at the ith reporting time and N-1 sets of superposition coefficients reported at least one reporting time before the ith reporting time, the target substrate, the first bit value and the second information, or the second bit value and the third information.

It can be understood that in this embodiment, since the network device determines CSI at the ith reporting time, the magnitude relationship between the maximum magnitude values and the ratio between the maximum magnitude values are also considered, and the relative magnitude relationship of the M stacking coefficients is accurately restored, so that the accuracy of the determined CSI can be improved.

In the communication method provided by the application, the network device can only configure the same CSI port number or parameter combination configuration of the target codebook once or through signaling in a period of time.

Illustratively, the period of time is the same as a long period of time that the network device configures for the terminal device. For example, the long period configured by the network device for the terminal device is 300ms, and at this time, the network device may configure the same CSI port number or parameter combination configuration of the target codebook only once or by signaling every 300 ms.

The communication method according to the embodiment of the present application is described in detail above with reference to fig. 3 to 4, and the communication apparatus according to the embodiment of the present application will be described in detail below with reference to fig. 5 and 6.

Fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application. Specifically, as shown in fig. 6, the apparatus includes: a transceiver module 501 and a processing module 502.

In a first embodiment, the communication apparatus may be applied to a terminal device. The processing module 502 is configured to determine to report M stacking coefficients to the network device, where M stacking coefficients are used to indicate channel state information of the terminal device, and M is a positive integer greater than 1; the processing module 502 is further configured to divide the M stacking coefficients into N groups of stacking coefficients, where the N groups of stacking coefficients correspond to N different grouping indexes, and each group of stacking coefficients includes stacking coefficients less than M, and N is a positive integer greater than 1; the transceiver module 501 is configured to report a set of stacking coefficients in the N sets of stacking coefficients at an ith reporting time, where N sets of stacking coefficients formed by the set of stacking coefficients and N-1 sets of stacking coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, the ith reporting time is located after a first reporting time, the number of stacking coefficients reported at the first reporting time is M, and i is a positive integer.

In one possible implementation manner, the first reporting time is a starting time of a long period configured by the network device for the terminal device, the long period includes K reporting times, and the ith reporting time is any reporting time except for the starting time in the K reporting times.

In one possible implementation, N different group indexes are taken from 0 to N-1, and the group index corresponding to the group of superposition coefficients reported at the ith reporting time is i% N.

In one possible implementation, the transceiver module 501 is further configured to: and receiving packet index indicating information sent by the network equipment, wherein the packet index indicating information is used for indicating the packet index corresponding to the group of superposition coefficients reported at the ith reporting time.

In one possible implementation, the transceiver module 501 is further configured to: transmitting a first bit value and second information at the ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in a group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value; or transmitting a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value.

In a possible implementation manner, the second information includes a first amplitude value and a first phase, and the third information includes a second amplitude value and a second phase, where the first amplitude value and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude value and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

In one possible implementation, n=2, and the processing module 502 is further configured to: dividing the M superposition coefficients into N groups of superposition coefficients according to a target grouping mode; wherein the target packet mode includes any one of the following: dividing the M stacking coefficients into N groups of stacking coefficients according to the polarization directions, dividing the M stacking coefficients according to the polarization directions, arranging the stacking coefficients included in each polarization direction after division according to the sequence from big to small, dividing the stacking coefficients into N groups of stacking coefficients, and dividing the M stacking coefficients into N groups of stacking coefficients after the M stacking coefficients are not arranged according to the polarization directions according to the sequence from big to small.

In one possible implementation, the transceiver module 501 is further configured to: reporting target substrate indication information to the network device, where the target substrate indication information is used to indicate a target substrate selected by the terminal device when the terminal device determines the M stacking coefficients, and the target substrate includes at least one substrate of: the system comprises a target airspace substrate, a target frequency domain substrate, and a target airspace and frequency domain combined substrate.

In one possible implementation, the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients corresponding to the target substrate, and the transceiver module 501 is further configured to: and reporting bitmap indication information corresponding to the M superposition coefficients to network equipment.

In one possible implementation, the transceiver module 501 is further configured to: reporting the first Discrete Fourier Transform (DFT) substrate and the first coefficient selected by the terminal equipment to the network equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate.

In one possible implementation, the terminal device reports at least one of the following information at the start of the long period: target base indication information, bitmap indication information, a first DFT base, and a first coefficient.

In one possible implementation, the transceiver module 501 is further configured to: receiving fourth information sent by the network device, wherein the fourth information indicates at least one of the following information: and N is valued, wherein the target grouping mode and the target codebook are used for determining the target substrate by the terminal equipment.

In a second embodiment, the communication apparatus may be applied to a network device.

Specifically, in this embodiment, the transceiver module 501 is configured to receive a set of superposition coefficients reported by a terminal device at an i-th reporting time, where the i-th reporting time is located after a first reporting time, and the number of superposition coefficients reported at the first reporting time is M, and i is a positive integer; the processing module 502 is configured to determine channel state information of the terminal device according to a set of superposition coefficients reported at the ith reporting time and N-1 sets of superposition coefficients reported at least one reporting time before the ith reporting time, where N sets of superposition coefficients formed by the set of superposition coefficients and the N-1 sets of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different group indexes, and N is a positive integer greater than 1.

In one possible implementation, the index corresponding to the set of superposition coefficients received at the ith reporting time is i% N.

In one possible implementation, the transceiver module 501 is further configured to: and sending grouping index indication information to the terminal equipment, wherein the grouping index indication information is used for indicating grouping indexes corresponding to a group of superposition coefficients reported at the ith reporting time.

In one possible implementation, the transceiver module 501 is further configured to: receiving target substrate indication information reported by terminal equipment, wherein the target substrate indication information is used for indicating target substrates selected by the terminal equipment when the terminal equipment determines M superposition coefficients, and the target substrates comprise at least one of the following substrates: the system comprises a target airspace substrate, a target frequency domain substrate, and a substrate combining a target airspace and a frequency domain; accordingly, the processing module 502 is specifically configured to: and determining the channel state information of the terminal equipment according to the set of superposition coefficients reported at the ith reporting time and the N-1 set of superposition coefficients and the target substrate reported at least one reporting time before the ith reporting time.

In one possible implementation, the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, where the target stacking coefficient set is a set formed by all stacking coefficients corresponding to the target substrate, and the transceiver module 501 is further configured to: receiving bitmap indication information corresponding to the M superposition coefficients reported by the terminal equipment; the processing module 502 is further configured to: and determining the positions of the M superposition coefficients in the target superposition coefficient set based on the bitmap indication information.

With reference to the fourth aspect, in a possible implementation manner, the transceiver module 501 is further configured to: receiving a first Discrete Fourier Transform (DFT) substrate and a first coefficient reported by the terminal equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate; the processing module 502 is further configured to: a target substrate is determined based on the first DFT substrate and the first coefficient.

In one possible implementation, at least one of the target base indication information, the bitmap indication information, the first DFT base, and the first coefficient is reported by the terminal device at a start time of the long period.

In one possible implementation, the transceiver module 501 is further configured to: receiving a first bit value and second information at an ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in the group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value; or receiving a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value; accordingly, the processing module 502 is further configured to: and determining the channel state information of the terminal equipment according to the set of superposition coefficients reported at the ith reporting time and the N-1 set of superposition coefficients reported at least one reporting time before the ith reporting time, the target substrate, the first bit value and the second information or the second bit value and the third information.

In one possible implementation, the second information includes a first amplitude and a first phase, and the third information includes a second amplitude and a second phase, where the first amplitude and the first phase are used to indicate a ratio of the second maximum value to the first maximum value, and the second amplitude and the second phase are used to indicate a ratio of the first maximum value to the second maximum value.

In one possible implementation, the transceiver module 501 is further configured to: transmitting fourth information to the terminal device, the fourth information indicating at least one of the following information: n is valued, a target grouping mode and a target codebook are adopted, and the target codebook is used for determining a target substrate by the terminal equipment.

In one possible implementation, the network device configures the same number of channel state information ports or parameter combination configuration of the target codebook only once or by signaling for a period of time.

In one possible implementation, the duration of the period is the same as the duration of the long period configured by the network device for the terminal device.

Fig. 6 is a schematic structural diagram of a communication device according to another embodiment of the present application. The apparatus shown in fig. 6 may be used to perform the method described in any of the previous embodiments.

As shown in fig. 6, the apparatus 600 of the present embodiment includes: memory 601, and processor 602. Optionally, the apparatus 600 further comprises a communication interface 603 and a bus 604. The memory 601, the processor 602, and the communication interface 603 are connected to each other by a bus 604.

The memory 601 may be a Read Only Memory (ROM), a static storage device, a dynamic storage device, or a random access memory (random access memory, RAM). The memory 601 may store a program, and the processor 602 is configured to perform the steps of the methods shown in fig. 3 to 4 when the program stored in the memory 601 is executed by the processor 602.

The processor 602 may employ a general-purpose central processing unit (central processing unit, CPU), microprocessor, application Specific Integrated Circuit (ASIC), or one or more integrated circuits for executing associated programs to implement the methods of the present application illustrated in fig. 3-4.

The processor 602 may also be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the methods of fig. 3-4 of the embodiments of the present application may be performed by integrated logic circuitry in hardware or by instructions in software in processor 602.

The processor 602 may also be a general purpose processor, a digital signal processor (DIGITAL SIGNAL processing unit, DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (field programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 601 and the processor 602 reads the information in the memory 601 and in combination with its hardware performs the functions required to be performed by the units comprised by the apparatus of the application, for example, the steps/functions of the embodiments shown in fig. 3 to 4 can be performed.

The communication interface 603 may enable communication between the apparatus 600 and other devices or communication networks using, but is not limited to, a transceiver-like transceiver.

A bus 604 may include a path to transfer information between elements of the apparatus 600 (e.g., the memory 601, the processor 602, the communication interface 603).

It should be understood that the apparatus 600 shown in the embodiment of the present application may be an electronic device, or may be a chip configured in an electronic device.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer 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 instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). 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 contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

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

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

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

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

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

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A communication method, applied to a terminal device, comprising:

m superposition coefficients are determined to be reported to network equipment, wherein the M superposition coefficients are used for indicating channel state information of the terminal equipment, and M is a positive integer greater than 1;

dividing the M stacking coefficients into N groups of stacking coefficients, wherein the N groups of stacking coefficients correspond to N different grouping indexes, the number of the stacking coefficients included in each group of stacking coefficients is smaller than M, and N is a positive integer larger than 1;

Reporting a group of superposition coefficients in the N groups of superposition coefficients at the ith reporting time, wherein N groups of superposition coefficients formed by the group of superposition coefficients and N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, the ith reporting time is positioned after the first reporting time, the number of superposition coefficients reported at the first reporting time is M, and i is a positive integer.

2. The method according to claim 1, wherein the first reporting time is a starting time of a long period configured by the network device for the terminal device, the long period includes K reporting times, and the ith reporting time is any reporting time except for the starting time in the K reporting times.

3. The method according to claim 1 or 2, wherein the N different group indexes are taken from 0 to N-1, and the group index corresponding to the set of superposition coefficients reported at the ith reporting time is i% N.

4. The method according to claim 1 or 2, characterized in that the method further comprises:

And receiving packet index indicating information sent by the network equipment, wherein the packet index indicating information is used for indicating the packet index corresponding to the group of superposition coefficients reported at the ith reporting moment.

5. The method according to any one of claims 1 to 4, further comprising:

Transmitting a first bit value and second information at the ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in a group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value;

or transmitting a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value.

6. The method of claim 5, wherein the second information includes a first amplitude and a first phase, wherein the third information includes a second amplitude and a second phase, wherein the first amplitude and the first phase are used to indicate a ratio of the second maximum to the first maximum, and wherein the second amplitude and the second phase are used to indicate a ratio of the first maximum to the second maximum.

7. The method according to any one of claims 1 to 6, wherein N = 2, said dividing the M stacking coefficients into N groups of stacking coefficients, comprising:

Dividing the M superposition coefficients into N groups of superposition coefficients according to a target grouping mode;

Wherein the target packet mode includes any one of the following: dividing the M stacking coefficients into N groups of stacking coefficients according to the polarization directions, dividing the M stacking coefficients according to the polarization directions, arranging the stacking coefficients included in each polarization direction after division according to the sequence from big to small, dividing the stacking coefficients into N groups of stacking coefficients, and dividing the M stacking coefficients into N groups of stacking coefficients after the M stacking coefficients are not arranged according to the polarization directions according to the sequence from big to small.

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

Reporting target substrate indication information to the network device, where the target substrate indication information is used to indicate a target substrate selected by the terminal device when the terminal device determines the M stacking coefficients, and the target substrate includes at least one substrate of: the system comprises a target airspace substrate, a target frequency domain substrate, and a target airspace and frequency domain combined substrate.

9. The method of claim 8, wherein the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, the target stacking coefficient set being a set of all stacking coefficients corresponding to the target substrate, the method further comprising:

And reporting bitmap indication information corresponding to the M superposition coefficients to the network equipment.

10. The method according to claim 8 or 9, characterized in that the method further comprises:

Reporting the first Discrete Fourier Transform (DFT) substrate and the first coefficient selected by the terminal equipment to the network equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate.

11. The method according to any of claims 8 to 10, characterized in that the terminal device reports at least one of the following information at the start time of the long period: the target base indication information, the bitmap indication information, the first DFT base, and a first coefficient.

12. The method according to any one of claims 1 to 11, further comprising:

Receiving fourth information sent by the network device, wherein the fourth information indicates at least one of the following information: and N is valued, wherein the target grouping mode and the target codebook are used for determining the target substrate by the terminal equipment.

13. A method of communication, for use with a network device, comprising:

Receiving a group of superposition coefficients reported by terminal equipment at an ith reporting time, wherein the ith reporting time is positioned after a first reporting time, the number of the superposition coefficients reported at the first reporting time is M, and i is a positive integer;

And determining channel state information of the terminal equipment according to a group of superposition coefficients reported at the ith reporting time and N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time, wherein N groups of superposition coefficients formed by the group of superposition coefficients and the N-1 groups of superposition coefficients reported at least one reporting time before the ith reporting time correspond to N different grouping indexes, and N is a positive integer greater than 1.

14. The method according to claim 13, wherein the first reporting time is a starting time of a long period configured by the network device for the terminal device, the long period includes K reporting times, and the ith reporting time is any reporting time except the starting time among the K reporting times.

15. The method according to claim 13 or 14, wherein the index corresponding to the set of superposition coefficients received at the ith reporting time is i% N.

16. The method according to claim 13 or 14, characterized in that the method further comprises:

And sending grouping index indication information to the terminal equipment, wherein the grouping index indication information is used for indicating grouping indexes corresponding to the group of superposition coefficients reported at the ith reporting moment.

17. The method according to any one of claims 13 to 16, further comprising:

Receiving target substrate indication information reported by the terminal equipment, wherein the target substrate indication information is used for indicating a target substrate selected by the terminal equipment when the terminal equipment determines the M superposition coefficients, and the target substrate comprises at least one substrate selected from the following: the system comprises a target airspace substrate, a target frequency domain substrate, and a substrate combining a target airspace and a frequency domain;

accordingly, determining the channel state information of the terminal device includes:

And determining the channel state information of the terminal equipment according to the group of superposition coefficients reported at the ith reporting time, the N-1 group of superposition coefficients reported at least one reporting time before the ith reporting time and the target substrate.

18. The method of claim 17, wherein the M stacking coefficients are partial stacking coefficients determined from a target stacking coefficient set, the target stacking coefficient set being a set of all stacking coefficients corresponding to the target substrate, the method further comprising:

Receiving bitmap indication information corresponding to the M superposition coefficients reported by the terminal equipment;

And determining the positions of the M superposition coefficients in the target superposition coefficient set based on the bitmap indication information.

19. The method according to claim 17 or 18, characterized in that the method further comprises:

receiving a first DFT substrate and a first coefficient reported by the terminal equipment, wherein the first DFT substrate and the first coefficient are used for representing the target substrate;

The target substrate is determined based on the first discrete fourier transform, DFT, substrate and first coefficients.

20. The method of claim 19, wherein at least one of the target base indication information, the bitmap indication information, the first DFT base, and a first coefficient is reported by the terminal device at a start time of the long period.

21. The method according to any one of claims 17 to 20, further comprising:

Receiving a first bit value and second information at the ith reporting time, wherein the first bit value indicates that a first maximum value is larger than a second maximum value, the first maximum value is the amplitude of a first superposition coefficient in M superposition coefficients reported at the first reporting time, the first superposition coefficient is the superposition coefficient with the largest amplitude in the M superposition coefficients reported at the first reporting time, the second maximum value is the amplitude of a second superposition coefficient in a group of superposition coefficients reported at the ith reporting time, the second superposition coefficient is the superposition coefficient with the largest amplitude in a group of superposition coefficients reported at the ith reporting time, and the second information indicates the ratio of the second maximum value to the first maximum value;

or receiving a second bit value indicating that the first maximum value is less than or equal to the second maximum value and third information indicating a ratio of the first maximum value to the second maximum value;

Correspondingly, the determining the channel state information of the terminal device according to the set of superposition coefficients reported at the ith reporting time, the N-1 set of superposition coefficients reported at least one reporting time before the ith reporting time, and the target substrate includes:

And determining channel state information of the terminal equipment according to the group of superposition coefficients reported at the ith reporting time and the N-1 group of superposition coefficients reported at least one reporting time before the ith reporting time, the target substrate, the first bit value and the second information or the second bit value and the third information.

22. The method of claim 21, wherein the second information includes a first amplitude and a first phase, wherein the third information includes a second amplitude and a second phase, wherein the first amplitude and the first phase are used to indicate a ratio of the second maximum to the first maximum, and wherein the second amplitude and the second phase are used to indicate a ratio of the first maximum to the second maximum.

23. The method according to any one of claims 13 to 22, further comprising:

Transmitting fourth information to the terminal device, the fourth information indicating at least one of the following information: and N is valued, wherein the target grouping mode and the target codebook are used for determining the target substrate by the terminal equipment.

24. The method of claim 23, wherein the network device configures the same number of channel state information ports or parameter combination configuration information of the target codebook by signaling only once for a period of time.

25. The method of claim 24, wherein the period of time is the same as a period of time of a long period configured by the network device for the terminal device.

26. A communication device, characterized in that it comprises means for performing the method of any one of claims 1 to 12.

27. A communication device, characterized in that it comprises means for performing the method of any of claims 13 to 25.

28. A communication device, comprising: a memory and a processor;

the memory is used for storing program instructions;

The processor is configured to invoke program instructions in the memory to perform the method of any of claims 1 to 12 or claims 13 to 25.

29. A computer readable medium storing program code for computer execution, the program code comprising instructions for performing the method of any one of claims 1 to 12 or 13 to 25.