Wireless communication method and apparatus, device, and storage medium

Abstract

A wireless communication method and apparatus, a device, a storage medium, and a program product, relating to the technical field of communications. The method comprises: receiving a first reference signal, wherein the number of ports configured for the first reference signal is M, the M ports are some ports among a maximum number N of ports that can be configured, M is a positive integer less than N, and N is an integer greater than 1 (step 310); and sending first channel state information on the basis of a determined reporting mode, wherein the first channel state information is obtained on the basis of the first reference signal (step 320). By means of the above method, on one hand, the transmission overhead of reference signals is reduced; on the other hand, a first device can flexibly select an appropriate reporting mode on the basis of requirements for feedback accuracy and feedback overhead.

Description

Wireless communication method, apparatus, device, and storage medium TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of communication, and particularly relate to a wireless communication method, apparatus, device, storage medium and program product. BACKGROUND

[0002] In practical application, a large-scale antenna array communication system may encounter an overhead problem of reference signals and channel state information.

[0003] SUMMARY

[0004] Embodiments of the present application provide a wireless communication method, apparatus, device and storage medium. The technical solutions provided by the embodiments of the present application are as follows:

[0005] According to an aspect of the embodiments of the present application, a wireless communication method is provided, the method is performed by a first device, and the method comprises:

[0006] receiving a first reference signal, a number of ports configured by the first reference signal is M ports, the M ports are part of N maximum configurable ports, M is a positive integer less than N, and N is an integer greater than 1;

[0007] sending first channel state information based on the determined reporting mode, the first channel state information is obtained according to the first reference signal.

[0008] According to an aspect of the embodiments of the present application, a wireless communication method is provided, the method is performed by a second device, and the method comprises:

[0009] sending a first reference signal, a number of ports configured by the first reference signal is M ports, the M ports are part of N maximum configurable ports, M is a positive integer less than N, and N is an integer greater than 1;

[0010] receiving first channel state information sent based on the determined reporting mode, the first channel state information is obtained according to the first reference signal.

[0011] According to an aspect of the embodiments of the present application, a wireless communication apparatus is provided, the apparatus comprises:

[0012] a receiving module configured to receive a first reference signal, a number of ports configured by the first reference signal is M ports, the M ports are part of N maximum configurable ports, M is a positive integer less than N, and N is an integer greater than 1;

[0013] The sending module is configured to send first channel state information based on the determined reporting mode, the first channel state information being obtained according to the first reference signal.

[0014] According to an aspect of an embodiment of the present application, a wireless communication device is provided, the device comprising:

[0015] The sending module is configured to send a first reference signal, the first reference signal being configured with M ports, the M ports being part of N maximum configurable ports, M being a positive integer less than N, and N being an integer greater than 1.

[0016] The receiving module is configured to receive first channel state information sent based on the determined reporting mode, the first channel state information being obtained according to the first reference signal.

[0017] According to an aspect of an embodiment of the present application, a communication device is provided, the communication device comprising a processor and a memory, the memory storing a computer program, and the processor executing the computer program to implement the wireless communication method described above.

[0018] According to an aspect of an embodiment of the present application, a computer readable storage medium is provided, the storage medium storing a computer program, the computer program being configured to be executed by a processor to implement the wireless communication method described above.

[0019] According to an aspect of an embodiment of the present application, a chip is provided, the chip comprising a programmable logic circuit and / or program instructions, and when the chip is running, the chip is configured to implement the wireless communication method described above.

[0020] According to an aspect of an embodiment of the present application, a computer program product is provided, the computer program product comprising a computer program, the computer program being stored in a computer readable storage medium, and a processor reading and executing the computer program from the computer readable storage medium to implement the wireless communication method described above.

[0021] The technical scheme provided by the embodiments of the present application can have the following beneficial effects:

[0022] On the one hand, the M ports of the first reference signal are only part of the N maximum configurable ports, which reduces the number of ports for sending the first reference signal and reduces the transmission overhead of the reference signal. On the other hand, the first device can flexibly select a suitable reporting mode according to the requirements of feedback accuracy and feedback overhead. BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

[0024] FIG. 2 is a schematic diagram of a CSI reporting method according to another embodiment of the present application;

[0025] FIG. 3 is a flow chart of a wireless communication method according to an embodiment of the present application;

[0026] FIG. 4 is a block diagram of a wireless communication device according to an embodiment of the present application;

[0027] FIG. 5 is a block diagram of a wireless communication device according to another embodiment of the present application;

[0028] FIG. 6 is a block diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] For the purpose of making the objects, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0030] The network architecture and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be known by those skilled in the art that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0031] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system, New Radio (NR) system, evolved system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system, NR-based access to unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system, B5G (Beyound 5G) system, 6th-Generation (6G) system or other communication systems, etc.

[0032] Generally, the traditional communication system supports a limited number of connections, which is easy to implement. However, with the development of communication technology, the mobile communication system will not only support the traditional communication, but also support, for example, Device to Device (D2D) communication, Machine to Machine (M2M) communication, Machine Type Communication (MTC), Vehicle to Vehicle (V2V) communication, or Vehicle to everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0033] The communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) network deployment scenario.

[0034] The communication system in the embodiments of the present application can be applied to an unlicensed spectrum, which can also be regarded as a shared spectrum, or can also be applied to a licensed spectrum, which can also be regarded as a non-shared spectrum.

[0035] The embodiments of the present application can be applied to a non-terrestrial network (NTN) system, and can also be applied to a terrestrial network (TN) system. The NTN generally adopts a satellite communication mode to provide communication services to ground users. The NTN system currently includes an NR-NTN and an IoT-NTN system, and other NTN systems can be included in the future.

[0036] Please refer to FIG. 1, which shows a schematic diagram of a network architecture 100 provided by an embodiment of the present application. The network architecture 100 can include a terminal device 10, an access network device 20, and a core network element 30.

[0037] The terminal device 10 can refer to a UE (User Equipment), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent, or a user equipment. In some embodiments, the terminal device 10 can also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with wireless communication function, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5GS (5th Generation System), or a terminal device in a future evolved PLMN (Public Land Mobile Network), etc., and the embodiments of the present application are not limited thereto. For the convenience of description, the above-mentioned devices are collectively referred to as terminal devices. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 can be distributed in a cell managed by each access network device 20. The terminal device can also be simply referred to as a terminal or a UE, and those skilled in the art can understand its meaning.

[0038] The access network device 20 is a device deployed in an access network to provide wireless communication functions for the terminal device 10. The access network device 20 can include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, the names of devices with access network device functions can be different, for example, in a 5G NR system, it is called gNodeB or gNB. As communication technology evolves, the name of the "access network device" may change. For ease of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as access network devices. In some embodiments, through the access network device 20, a communication relationship can be established between the terminal device 10 and the core network element 30. Illustratively, in the LTE (Long Term Evolution) system, the access network device 20 can be an EUTRAN (Evolved Universal Terrestrial Radio Access Network) or one or more eNodeBs in the EUTRAN; in the 5G NR system, the access network device 20 can be a RAN (Radio Access Network) or one or more gNBs in the RAN. In the embodiments of the present application, the "network device" refers to the access network device 20, such as a base station, unless otherwise specified.

[0039] The core network element 30 is a network element deployed in the core network, and the main functions of the core network element 30 are to provide user connection, management of users, and completion of bearer for services, and to provide an interface to external networks as a bearer network. For example, the core network element in the 5G NR system can include an AMF (Access and Mobility Management Function) entity, a UPF (User Plane Function) entity, and an SMF (Session Management Function) entity, and the like.

[0040] In some embodiments, the access network device 20 and the core network element 30 communicate with each other through some air interface technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other through some air interface technology, such as the Uu interface.

[0041] The "5G NR system" in the embodiments of the present application can also be referred to as a 5G system or an NR system, but those skilled in the art can understand its meaning. The technical solutions described in the embodiments of the present application can be applicable to the LTE system, and can also be applicable to the 5G NR system, and can also be applicable to the subsequent evolution system of the 5G NR system (for example, the B5G (Beyond 5G, Super Five Generation Mobile Communication Technology) system, the 6G system (6th Generation System, the sixth generation mobile communication system)), and can also be applicable to other communication systems such as the NB-IoT (Narrow Band Internet of Things, Narrow Band Internet of Things) system, and the like, and the present application does not limit this.

[0042] In the embodiments of the present application, the network device can provide services for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource, or a spectrum resource) on a carrier used by the cell. The cell can be a cell corresponding to the network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell (Small cell). The small cell can include a metro cell, a micro cell, a pico cell, a femto cell, and the like. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-speed data transmission services.

[0043] Before introducing the technical solutions of the present application, some related technical knowledge involved in the present application will be introduced and explained. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any way, and all belong to the protection scope of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0044] 1, CSI (Channel State Information, Channel State Information) reporting mode

[0045] In order for the network device to be reasonably scheduled, the terminal device needs to feed back the downlink CSI to let the network device (such as a base station) determine the scheduling information of the terminal device, such as the number of transmission layers, the precoding matrix, the sending beam, the modulation and coding mode, and the like. Specifically, the CSI reporting of the terminal device is based on the CSI reporting configuration indicated by the network device and the CSI-RS (Channel State Information Reference Signal) sent by the network device, and the uplink resource used by the terminal device to report the CSI and the CSI-RS used for CSI measurement are both indicated by the CSI reporting configuration. Among them, each CSI reporting configuration corresponds to one CSI reporting, and each CSI reporting can contain different information such as CRI (CSI-RS Resource Indicator), RI (Rank Indicator), PMI (Precoding Matrix Indicator), CQI (Channel Quality Indicator), and the like. These information are obtained based on the CSI-RS configured and sent by the network device. Specifically, the content or information contained in the CSI is determined by the reportQuantity in the CSI reporting configuration. The reportQuantity can indicate at least one of the following reporting quantities: CRI, RI, PMI, CQI, RSRP (Reference Signal Received Power), and LI (Layer Index). Among them, CRI is used to determine the CSI-RS resource currently used for channel measurement and the IMR (Interference Measurement Resource) currently used for interference measurement from multiple CSI-RS resources; RI is used to report the recommended number of transmission layers; PMI is used to determine the recommended precoding matrix from the predefined codebook; CQI is used to report the current channel quality; RSRP is used to report the RSRP of the SSB (Synchronization Signal Block) or CSI-RS corresponding to the index fed back, thereby used for the network device side to determine the beam used for downlink transmission; and LI is used to report the index of the transmission layer associated with the PTRS (Phase Track Reference Signal).

[0046] Wherein, the RI, PMI and CQI can be determined based on the SINR (Signal-to-Interference-plus-Noise Ratio) estimated by the terminal device. The channel part in the SINR is determined based on the non-zero power CSI-RS configured by the network device for channel measurement, and the interference part is determined based on the CSI-IM (Channel State Information-Interference Measurement) or non-zero power CSI-RS configured by the network device for interference measurement. In one aspect, the CSI-RS resource for channel measurement can contain multiple antenna ports, which is used to measure the complete channel of the downlink to calculate the CSI. In another aspect, the codebook used to determine the PMI can have two codebooks: a normal codebook and a port selection codebook. Among them, the normal codebook requires the terminal device to select part of the beams from multiple beams and feedback through the codebook parameters; the port selection codebook requires the terminal device to select part of the antenna ports from multiple antenna ports, and feedback through the codebook parameters, each antenna port corresponds to a beam.

[0047] The CSI reporting of the terminal device can have three reporting modes: periodic CSI reporting, quasi-persistent CSI reporting and aperiodic CSI reporting. As shown in FIG. 2, the horizontal axis represents time (t).

[0048] Mode 1: Periodic CSI reporting, as shown in subgraph 1 of FIG. 2, the periodic CSI can be transmitted on the PUCCH (Physical Uplink Control Channel), and the CSI reporting configuration is pre-configured by the RRC (Radio Resource Control) signaling. After the terminal device receives the corresponding RRC configuration, it periodically reports the CSI.

[0049] Manner 2: quasi-persistent CSI reporting, also known as semi-persistent CSI reporting. As shown in subgraph 2 and subgraph 3 in FIG. 2, quasi-persistent CSI can be transmitted on a PUCCH or a PUSCH (Physical Uplink Shared Channel), the CSI corresponding to the CSI reporting configuration transmitted on the PUCCH is pre-configured by RRC signaling and activated or deactivated by MAC (Medium Access Control) layer signaling MAC CE (MAC Control Element). The CSI corresponding to the CSI reporting configuration transmitted on the PUSCH is dynamically indicated (activated or deactivated) by DCI (Downlink Control Information) signaling. After receiving the activation signaling configured by the network device, the terminal device periodically transmits the CSI on the PUCCH or the PUSCH until the deactivation signaling is received.

[0050] Manner 3: aperiodic CSI reporting, as shown in subgraph 4 in FIG. 2, the CSI reporting configuration corresponding to the aperiodic CSI reporting can be pre-configured by RRC signaling, or part of the configuration can be activated by MAC layer signaling first, and then the CSI reporting configuration used for CSI reporting is indicated by the CSI trigger signaling in the DCI. After receiving the CSI trigger signaling, the terminal device reports the corresponding CSI on the scheduled PUSCH according to the indicated CSI reporting configuration.

[0051] 2, Compressed sensing theory

[0052] According to the compressed sensing theory, it can be considered that if the signal is sparse, it can be reconstructed and recovered by a number of sampling points much lower than the requirement of the Nyquist sampling theorem. At present, compressed sensing is widely used in the field of signal and image processing. Compressed sensing is based on the sparsification of the target signal and the selection of a suitable measurement matrix, and the sampling and compression of the sparse signal are performed simultaneously, only a small amount of data needs to be transmitted, and the receiving end recovers the signal according to the corresponding recovery matrix. The compressed sensing theory has also shown superior performance in channel estimation.

[0053] In practical applications, a large-scale antenna array communication system often encounters the problem of reference signal overhead. In the related art, each antenna port needs to send a dedicated reference signal to enable a terminal device to obtain channel state information of the corresponding antenna port. However, as the number of antenna ports increases, the reference signal overhead will increase linearly. That is, the reference signal overhead depends on the number of reference signal ports. The more the number of antenna ports, the greater the reference signal overhead. For example, the reference signal can occupy all subcarriers of one or more time slots, and even more and more system resources will be occupied by the transmission of the reference signal, resulting in a decrease in system available resources and a decrease in overall system performance. Moreover, after the network device sends the reference signal, the terminal device needs to report CSI based on the reference signal, and how to reduce the feedback overhead of CSI reporting also needs to be studied. The technical solutions provided in the embodiments of the present application can be used to solve the technical problem, that is, to reduce the overhead of the reference signal and the feedback overhead of the channel state information.

[0054] Please refer to FIG. 3, which shows a flowchart of a wireless communication method provided by an embodiment of the present application. The method can be applied to the network architecture shown in FIG. 1. As shown in FIG. 3, the method can include at least one of the following steps (310-320).

[0055] Step 310: The second device sends a first reference signal, the first reference signal is configured with M ports, the M ports are part of the N maximum configurable ports, M is a positive integer less than N, and N is an integer greater than 1.

[0056] Correspondingly, the first device receives the first reference signal.

[0057] In some embodiments, the first reference signal is a reference signal sent by the second device to the first device. On the second device side, the maximum number of ports that can be configured for the first reference signal is N, that is, the second device can send the first reference signal on at most N ports. In this step 310, the second device can send the first reference signal on part of the N ports (i.e., M ports). Compared with the second device sending the first reference signal to the first device on the N ports, the embodiments of the present application reduce the number of ports used to send the first reference signal, thereby reducing the overhead of transmitting the first reference signal between the first device and the second device.

[0058] In some embodiments, when the first reference signal is a downlink reference signal, the second device is a network device, and the first device is a terminal device. When the first reference signal is a downlink reference signal, the first reference signal can be a CSI-RS, and the first device can feed back one or more of CRI, RI, PMI, CQI, RSRP, and LI in the CSI. Of course, the first reference signal can also be other downlink reference signals such as a DMRS (Demodulation Reference Signal), and the like, which are not limited in the present application.

[0059] In step 320, the first device sends the first channel state information based on the determined reporting mode, wherein the first channel state information is obtained according to the first reference signal.

[0060] Correspondingly, the second device receives the first channel state information.

[0061] In some embodiments, the reporting mode refers to a manner and strategy in which the first device determines the first channel state information based on the received first reference signal. In some embodiments, the first device can obtain the first channel state information according to the first reference signal and send the first channel state information to the second device. In some embodiments, the first channel state information determined by the first device can include channel state information of N ports or only include channel state information of part of the N ports. In some embodiments, different reporting modes can be determined according to whether the first channel state information includes channel state information of all or part of the ports. When the first channel state information includes channel state information of all the ports, the reporting mode corresponding to this case is used to indicate that the first channel state information includes channel state information of N ports; when the first channel state information includes channel state information of part of the ports, the reporting mode corresponding to this case is used to indicate that the first channel state information only includes channel state information of part of the N ports.

[0062] In summary, the technical scheme provided by the embodiments of the present application has the following advantages. On the one hand, the M ports of the first reference signal are only part of the maximum configurable N ports, which reduces the number of ports for sending the first reference signal and reduces the transmission overhead of the reference signal. On the other hand, the first device can flexibly select a suitable reporting mode according to the requirements of feedback accuracy and feedback overhead.

[0063] When the second device sends the first reference signal in part of the N ports, the reporting mode determined by the first device can be any one of the following three modes: a first mode, a second mode, and a third mode.

[0064] (1) a first mode, the first channel state information corresponding to the first mode includes: part of the channel state information measured according to the first reference signal, the part of the channel state information including channel state information of M ports.

[0065] In some embodiments, the first device measures the channel state information of M ports according to the first reference signal, and the channel state information of M ports can be referred to as a received signal y or compressed channel information y, wherein the dimension of y can be M*1. In some embodiments, y=X*h+z, wherein h is channel state information of N ports, the dimension of h can be N*1, X is a measurement matrix related to the first reference signal, the dimension of X can be M*N, and z is noise.

[0066] In some embodiments, the content of the compressed channel information y, that is, the channel state information of M ports, can be the content associated with the first codebook, that is, the channel state information of M ports can be encoded into the first codebook for transmission. The first codebook can be a TypeI codebook, a TypeII codebook, or an eTypeII codebook, which is not limited in the present application.

[0067] In some embodiments, the content of the compressed channel information y, that is, the channel state information of M ports, includes at least one of the following: spatial domain basis (SD basis) information corresponding to M ports respectively; frequency domain basis (FD basis) information corresponding to M ports respectively; weight coefficient information corresponding to M ports respectively; weight coefficient information between M ports; inter-polarization phase corresponding to the spatial domain basis information corresponding to M ports respectively.

[0068] In some embodiments, the spatial domain basis information, also referred to as beam information, is used to indicate one or more beams. In some embodiments, the PMI is used to determine the recommended precoding matrix (i.e., beam configuration) from the predefined codebook, that is, the PMI containing one or more beam information can be fed back in the first channel state information, each beam information corresponding to an antenna port or an antenna port group (port group). Wherein, the antenna port group, also referred to as subarray, includes a plurality of antenna ports, in other words, each beam information corresponds to an antenna port or a plurality of antenna ports.

[0069] In some embodiments, the frequency-domain basis information is used to indicate one or more DFT (Discrete Fourier Transform) vectors, where the DFT vectors are used to describe the relationship of multiple antenna ports in the frequency domain. That is, the PMI can be fed back in the first channel state information, where the PMI contains one or more frequency-domain basis information, each of which corresponds to an antenna port or an antenna port group (including multiple antenna ports), or each of which corresponds to an antenna port or multiple antenna ports.

[0070] In some embodiments, the weighting coefficient information of the antenna ports can be the weighting coefficient between two polarization directions, or the weighting coefficient corresponding to each frequency-domain basis, or the weighting coefficient corresponding to the combination of each frequency-domain basis and the spatial-domain basis. The polarization direction refers to the electric field direction of the polarized electromagnetic wave, and the two polarization directions can be horizontal polarization and vertical polarization, respectively.

[0071] In some embodiments, the weighting coefficient information between the antenna ports can indicate the weighting coefficient of other antenna ports relative to the reference antenna port. For example, assuming that the reference antenna port is antenna port 1, the weighting coefficient information can represent the weight or gain of other antenna ports such as antenna port 2 and antenna port 3 relative to antenna port 1. By optimizing the weighting coefficient information between the antenna ports, the performance of the multi-antenna system in the multipath fading environment can be improved.

[0072] In some embodiments, the inter-polarization phase corresponding to the spatial-domain basis information is used to describe the polarization phase difference between multiple beam information. In some embodiments, each beam information corresponds to an inter-polarization phase. Specifically, a bit can be used to indicate the polarization direction of the beam. For example, bit 0 indicates 0-degree polarization, and bit 1 indicates 90-degree polarization.

[0073] In some embodiments, when the reporting mode is the first mode, the first reference signal related measurement matrix is indicated by the first device to the second device, and the second device is the device sending the first reference signal. Specifically, the first device obtains partial channel state information according to the first reference signal measurement, and directly feeds back the partial channel state information to the second device (i.e., directly feeds back the above y), and the first device indicates the first reference signal related measurement matrix to the second device, and the second device recovers the channel state information of the N ports based on the partial channel state information y and the first reference signal related measurement matrix. The specific implementation of recovering the channel state information of the N ports is described in the following second mode and third mode. In this method, the recovery calculation of the channel state information of the N ports is completed by the second device side, which avoids the calculation overhead of the first device for recovering the channel state information of the N ports, and saves the calculation overhead of the first device.

[0074] In some embodiments, when the reporting mode is the first mode, the first device can obtain a plurality of recovered full channel state information according to a plurality of different M values (such as M1, M2, M3, M4), respectively, compare the plurality of recovered full channel state information with the actually measured full channel state information, determine an M value that can balance the performance of the recovered full channel state information and the feedback overhead of the first device, and feed back the determined M value to the second device (such as the terminal device feeding back the M value to the network device). The second device can configure the number of ports of the first reference signal according to the M value.

[0075] (2) The second mode corresponds to the first channel state information including the sparse transformed full channel state information recovered by the compression sensing technology.

[0076] In some embodiments, the first device obtains the first channel state information by a method related to the compression sensing technology. In some embodiments, the first device respectively measures the first reference signal of the M ports to obtain the channel state information corresponding to the M ports respectively, and obtains the full channel state information by the compression sensing technology based on the channel state information corresponding to the M ports respectively, that is, obtains the channel state information of the N ports. For example, M is 8 and N is 64. Of course, N and M can also have other values, which are not limited in the embodiments of the present application.

[0077] In some embodiments, the first device measures the channel state information of the M ports according to the first reference signal, i.e., the above-mentioned received signal y. In some embodiments, assuming that the channel state information h of the N ports is sparse in the first sparse transform domain, X can be an M*N matrix. In some embodiments, the dimension of the measurement matrix X corresponds to M. In some embodiments, the measurement matrix is stored on both the first device and the second device; each time the calculation is performed, the first M rows of the measurement matrix are taken according to the number of ports M of the first reference signal to obtain the measurement matrix X. In some embodiments, h being sparse in the first sparse transform domain can be expressed as h = A * h', where A is a first sparse transform basis in the first sparse transform domain, and h' is a sparse representation of the full channel state information after the sparse transform basis. Specifically, the channel state information h of the N ports can be converted into a sparse representation h' in another domain by means of compression sensing, which can be expressed as h' = A * h, i.e., h' is the full channel state information after sparse transform recovered by compression sensing technology. T

[0078] In some embodiments, the above-mentioned first sparse transform basis A, also referred to as a sparse basis matrix, can be any sparse transform basis, for example, a DCT (Discrete Cosine Transform) basis, a DFT (Discrete Fourier Transform) basis, or a basis generated by W = hh T The eigenvectors obtained, etc., are not limited in the embodiments of the present application.

[0079] In some embodiments, the full channel state information h describes the entire transmission path of the signal from the transmitting end to the receiving end, including the propagation characteristics of the signal in space. The propagation characteristics can be described in different domains such as the angle domain and the time delay domain. In some embodiments, the full channel state information h is sparse in the angle domain and / or the time delay domain.

[0080] In some embodiments, the angle domain is usually used to describe the directional characteristics of the channel, i.e., the propagation path of the signal from the transmitter to the receiver and the relative angle relationship thereof. The full channel state information h being sparse in the angle domain means that the angle response of the channel can be effectively represented by a small number of angle components, i.e., the case where most of the angle components are zero or close to zero. Exemplarily, only a few significant angle components can be focused on, and those angle components close to zero can be ignored.

[0081] ​In some embodiments, the delay domain is generally used to describe the transmission delay characteristics of a signal from a transmitting end to a receiving end, including the time difference of the signal arriving at the receiver through different paths. The full channel state information h is sparse in the delay domain, which means that the delay response of the channel exhibits sparse properties in the delay domain. That is, the delay response of the channel can be effectively represented by fewer delay components, most of which are zero or close to zero. Exemplarily, only those significant delay components can be focused on, while those delay components that have less impact on the system or can be combined are ignored, thereby simplifying the modeling and processing of the channel delay characteristics.

[0082] In some embodiments, the full channel state information h can be made sparse by SVD (Singular Value Decomposition) decomposition. Singular value decomposition is a method of matrix decomposition, which can decompose a complex matrix into multiple simple parts, including a set of singular values and corresponding left and right singular vectors. Here, the dimension of the full channel state information h can be N*1, and by decomposing the full channel state information h by SVD, the larger singular values and left and right eigenvectors corresponding to the full channel state information h are obtained to obtain sparsity.

[0083] In some embodiments, the way in which the first device feeds back the first channel state information can indicate the positions of the non-zero elements by bitmap or grouped bitmap. Specifically, the sparse transformed full channel state information recovered by the first device through the compressed sensing technology can be represented as a matrix h’. In some embodiments, the positions of the non-zero elements in h’ can be indicated by bitmap or grouped bitmap.

[0084] In some embodiments, indicating the positions of the non-zero elements in h’ by bitmap means that the elements in the matrix h’ are arranged in an element sequence in the order of top to bottom and left to right, and each element is represented by a bit to indicate whether it is a non-zero element. If the element is a non-zero element, the corresponding bit in the bitmap can be a first identifier (such as the number “1”); if the element is a zero element, the corresponding bit in the bitmap can be a second identifier (such as the number “0”). For example, for the matrix in the order of top to bottom and left to right, the four elements of the matrix are zero element, non-zero element, zero element and zero element, respectively. Then, the bitmap corresponding to the matrix can be “0, 0, 1, 0”, in which 1 represents a zero element and 0 represents a non-zero element.

[0085] In some embodiments, the positions of the non-zero elements in h' are indicated by the bitmap, which means that the elements in the matrix h' are arranged in an element sequence in the order from top to bottom and from left to right, and the elements in the sequence are divided into multiple element groups in the order from front to back. If there is a non-zero element in an element group, the bit corresponding to the element group in the grouping bitmap can be the first identifier, and another bitmap is used to indicate the position of the non-zero element of the element value. If all elements in an element group are 0, the bit corresponding to the element group in the grouping bitmap can be the second identifier. For example, for the matrix The elements can be divided into 4 groups, i.e., the first group of elements is "0, 0, 0, 0", the second group of elements is "0, 0, 0, 0", the third group of elements is "0, 0, 0, 3", and the fourth group of elements is "0, 0, 0, 0". Then, the bitmap can be represented by "0, 0, 1, 0" for the first, second, and fourth groups of zero elements, and "0, 0, 0, 1" for the third group of non-zero elements. In this way, for a sparse matrix, the grouping bitmap can indicate the positions of the non-zero elements in the matrix with fewer bits relative to the bitmap, saving information transmission overhead.

[0086] (3) The third mode, the first channel state information corresponding to the third mode includes: full channel state information recovered by the compressed sensing technology. The full channel state information includes channel state information of N ports.

[0087] In some embodiments, the full channel state information recovered by the compressed sensing technology is the above-mentioned h, and the full channel state information h can be obtained based on the full channel state information h' after sparse transformation, i.e., h = A * h'.

[0088] In some embodiments, when the reporting mode is the second mode or the third mode, the first reference signal related measurement matrix is indicated by the second device to the first device, and the second device is the device sending the first reference signal. Specifically, the first device obtains partial channel state information y according to the first reference signal measurement, and recovers the channel state information of N ports according to the first reference signal related measurement matrix indicated by the second device. This method completes the recovery calculation of the channel state information of N ports by the first device side, avoiding the calculation overhead of the second device for recovering the channel state information of N ports, and saving the calculation overhead of the second device.

[0089] In some embodiments, when the reporting mode is the second mode or the third mode, the value of M is indicated by the second device, and the first device does not need to report.

[0090] In some embodiments, for the second mode and the third mode, since the channel state information of the N ports other than the M ports is recovered rather than measured, the recovered channel state information of the N ports can have some deviation from the actual channel state information of the N ports.

[0091] In some embodiments, the second device can also send the first reference signal on all of the N ports, i.e., in the case that the number of ports configured for the first reference signal is N ports, the reporting mode determined by the first device is the fourth mode:

[0092] (4) The fourth mode, the first channel state information corresponding to the fourth mode includes the measured full channel state information of the N ports.

[0093] It can be understood that since the number of ports configured for the first reference signal is all of the N ports, i.e., the second device sends the first reference signal on all of the N ports, the first channel state information determined by the first device can include the channel state information of the N ports, i.e., the measured full channel state information of the N ports, i.e., the actual full channel state information of the N ports.

[0094] The above method, the first mode is to directly feed back compressed channel information, the third mode is to feed back the full channel state information recovered through the compression sensing technology, and the second mode is to feed back the full channel state information after sparse transformation. Therefore, when the first device feeds back the first channel state information according to the first mode and the second mode, since the compressed channel information or the information after sparse transformation reduces the total amount of feedback data, the overhead of the first channel state information feedback is reduced. When the first device feeds back the first channel state information according to the third mode, since the full channel state information recovered by the compression sensing technology is used, the accuracy of the feedback information is improved compared to the first mode and the second mode. When the first device feeds back the first channel state information according to the fourth mode, since the first channel state information is measured based on the first reference signal configured on all ports, the accuracy and reliability of the first channel state information are improved.

[0095] In some embodiments, the above reporting mode is indicated by a high-layer signaling parameter or downlink control information. In some embodiments, the high-layer signaling can be RRC or MAC-CE. Exemplarily, the RRC parameter can be configured, such as by reportQuantity, CSI-ReportConfig, CSI-ReportSubConfig, and other newly defined RRC parameters. In some embodiments, the reporting mode can also be indicated by the lower-layer control information DIC.

[0096] In some embodiments, the first device is configured or instructed to fallback to the fourth mode in case the reporting mode is not the fourth mode. The first device is configured or instructed to fallback to the fourth mode means that the first device is required to stop the current reporting mode and switch to the fourth mode to ensure the reported channel state information is more accurate and reliable.

[0097] In some embodiments, the second device sets a monitoring threshold for the gap between the channel state information fed back by the first device and the actual channel state information, and the first device is configured or instructed to fallback to the fourth mode when the gap between the channel state information fed back by the first device and the actual channel state information exceeds the monitoring threshold, and the monitoring threshold can be preset according to experience. In some embodiments, the first device can be instructed to fallback to the fourth mode through high layer signaling configuration or downlink control information.

[0098] In some embodiments, the first device requests to fallback to the fourth mode in case the reporting mode is not the fourth mode. For example, the first device requests to configure the reference signal of the full port (i.e. N ports). For example, the first device sends the request information for requesting to fallback to the fourth mode.

[0099] The above method can flexibly instruct the reporting mode of the first device through high layer signaling configuration or downlink control information. In addition, in order to adapt to the complexity and variability of the communication environment, when the second device detects that there is a large gap between the channel state fed back by the first device and the actual channel state, the reporting mode of the first device can fallback to the fourth mode, and this fallback mechanism ensures the accuracy and reliability of the reported channel state information.

[0100] The method for determining the measurement matrix related to the first reference signal can exist in at least two ways as follows:

[0101] Way 1, the measurement matrix related to the first reference signal is a predefined matrix.

[0102] For example, the predefined matrix can be a random matrix; for example, the predefined matrix can be a Gaussian matrix; for example, the predefined matrix can be a DCT (Discrete Cosine Transform) matrix; for example, the predefined matrix can be a Bernoulli matrix; for example, the predefined matrix can be obtained by transforming the Fourier transform matrix.

[0103] In some embodiments, the predefined matrix is related to at least one of the following: the antenna structure of the first device, the antenna structure of the second device, and the second device is the device sending the first reference signal.

[0104] In some embodiments, the antenna structure refers to the antenna type, architecture and arrangement thereof in space. In some embodiments, the antenna structure can include the number of horizontal direction antennas, the number of vertical direction antennas, the number of horizontal direction DFT oversampling, the number of vertical direction DFT oversampling O2, the number of antenna panels of the second device, etc. Among them, the number of horizontal direction antennas refers to the number of horizontal direction (lateral) antennas in the device; the number of vertical direction antennas refers to the number of vertical direction (longitudinal) antennas in the device; the number of horizontal direction DFT oversampling refers to the number of oversampling of the horizontal direction signal when performing discrete Fourier transform; the number of vertical direction DFT oversampling O2 refers to the number of oversampling of the vertical direction signal when performing discrete Fourier transform; and the number of antenna panels of the second device refers to the total number of antenna panels installed in the second device.

[0105] In some embodiments, different antenna structures correspond to different measurement matrices. That is, the measurement matrix can be determined according to the antenna structure of the first device and the antenna structure of the second device. For example, the antenna structure 1 of the first device corresponds to the measurement matrix 1, and the antenna structure 2 of the first device corresponds to the measurement matrix 2, which is not limited in the present application.

[0106] In some embodiments, the indication of the measurement matrix is to send the measurement matrix, or to send the index of the measurement matrix.

[0107] In some embodiments, when the indication of the measurement matrix is to send the measurement matrix, it means to directly send the specific content of the measurement matrix.

[0108] In some embodiments, when the indication of the measurement matrix is to send the index of the measurement matrix, the first device side and the second device side both store at least one measurement matrix, and the index of the measurement matrix is used to indicate the measurement matrix with at least one bit without directly containing the specific content of the measurement matrix. For example, the first device side and the second device side both store the measurement matrix 1, the measurement matrix 2 and the measurement matrix 3, and the identification of the measurement matrix 1, the measurement matrix 2, the measurement matrix 3 and the measurement matrix 4 can be 1, 2, 3 and 4 respectively. That is, the first information can indicate the measurement matrix 1 with the identification "1", the measurement matrix 2 with the identification "2", the measurement matrix 3 with the identification "3" and the measurement matrix 4 with the identification "4". In some embodiments, 2-bit can be used to represent the above identification 1, 2, 3 and 4, such as 00 representing 1, 01 representing 2, 10 representing 3 and 11 representing 4. The at least one bit can be used to represent the identification of the indicated measurement matrix, thereby saving the number of bits occupied by the transmitted information, thereby saving the transmission overhead of the information.

[0109] In some embodiments, the measurement matrix and the index of the measurement matrix sent above can be carried by PUSCH or PUCCH, which is not limited in the present application.

[0110] In a manner 2, the measurement matrix related to the first reference signal is a matrix obtained according to an AI model.

[0111] In some embodiments, the input data of the AI model comprises at least one of the following: an antenna configuration of the first device, an antenna structure of the first device, channel state information measured by the first device according to different reference signal configurations, full channel state information measured by the first device according to N ports, a receiving antenna index of the first device, a time stamp of a measurement time of the first device, a sparse basis matrix corresponding to the full channel state information of the N ports, full channel state information recovered by the first device from partial channel state information measured by the first device according to M ports, a horizontal antenna number of the first device, a vertical antenna number of the first device, a horizontal DFT oversampling number of the first device, a vertical DFT oversampling number of the first device, a number of antenna panels of the second device, an antenna configuration of the second device, an antenna structure of the second device, a reference signal configuration of the second device, and a time stamp corresponding to the reference signal configuration of the second device.

[0112] In some embodiments, the antenna configuration refers to the arrangement and type of antennas, which can include an antenna port configuration and an antenna port group configuration. The antenna port configuration is used to indicate the number of sending and receiving ports, and the antenna port group, also referred to as a panel, is used to indicate the number of sending and receiving panels. In some embodiments, the channel state information measured by the first device according to different reference signal configurations refers to the above-mentioned received information y, which can include channel state information measured according to different reference signal configurations. In some embodiments, the full channel state information measured by the first device according to N ports refers to the full channel state information measured when the reference signal configuration port number is N ports (all ports), i.e., the actual measured full channel state information. In some embodiments, the receiving antenna index of the first device refers to the unique identification or number of the antenna in the first device used for receiving signals, to distinguish different receiving antennas. In some embodiments, the timestamp of the measurement time of the first device refers to the time information recorded when measuring the channel state information, usually represented in a specific format, used to identify the exact time point of data collection, such as xx hours xx minutes xx seconds. In some embodiments, the sparse basis matrix corresponding to the full channel state information of N ports refers to the sparse basis matrix used when the full channel state information measured by N ports is sparsely represented. In some embodiments, the full channel state information recovered by the first device according to the partial channel state information measured by M ports is the full channel state information h recovered by the compression sensing technology described above. In some embodiments, the reference signal configuration of the second device refers to the specific settings and parameters of the second device used to send reference signals, including signal frequency, power, etc. In some embodiments, the reference signal configuration of the second device can be periodic, aperiodic, and semi-persistent. In some embodiments, the timestamp corresponding to the reference signal configuration of the second device can include the exact time information of the second device sending the reference signal, usually represented in a specific format, such as xx hours xx minutes xx seconds.

[0113] In some embodiments, when the input data of the AI model includes the full channel state information recovered by the partial channel state information measured by M ports, the input data of the AI model also includes the measurement matrix corresponding to the recovered full channel state information and the compressed channel information y.

[0114] In some embodiments, the measurement matrix is indicated by sending the measurement matrix, or sending the update information of the measurement matrix relative to the reference matrix.

[0115] In some embodiments, when the indication manner of the measurement matrix is to send the measurement matrix, it means to directly send the specific content of the measurement matrix. In some embodiments, the update information of the measurement matrix relative to the reference matrix refers to the data contained in the current measurement matrix, which is determined to be changed after comparing with the recorded reference matrix. For example, the reference matrix can be the measurement matrix sent or determined last time. By sending the update information of the measurement matrix relative to the reference matrix, this method only transmits the part of the data in the measurement matrix that has changed, which saves the resource consumption of information transmission and helps the receiving party to identify and understand the new channel state or related data change in the transmission process.

[0116] On the one hand, the above method can flexibly select mode 1 or mode 2 to determine the measurement matrix related to the first reference signal. On the other hand, since the configuration of the antenna structure of the first device and the second device is fully considered when determining the measurement matrix, the determined measurement matrix is more matched with the antenna structure of the first device and the second device.

[0117] In some embodiments, different sparse basis matrices and measurement matrices are used for different first device antenna configurations and second device antenna configurations to recover the full channel state information.

[0118] In some embodiments, the sparse basis matrix corresponding to the full channel state information of the N ports is related to at least one of the following information: the maximum configurable port number N, the configured port number M, the number of horizontal antennas, the number of vertical antennas, the number of horizontal DFT oversampling, the number of vertical DFT oversampling O2, and the number of antenna panels of the second device.

[0119] In some embodiments, the measurement matrix related to the first reference signal is related to at least one of the following information: the maximum configurable port number N, the configured port number M, the number of horizontal antennas, the number of vertical antennas, the number of horizontal DFT oversampling, the number of vertical DFT oversampling O2, the number of antenna panels of the second device, the configuration information of the reference signal resource, and the configuration information of the channel state information reporting.

[0120] In some embodiments, the reference signal resource refers to the transmission resource of the reference signal. In some embodiments, the reference signal resource can be divided into one or more reference signal resource sets, and the reference signal resource set refers to a set of transmission resources of the reference signal. The transmission resources include but are not limited to time-frequency resources. The configuration information of the reference resource refers to the specific settings and parameters of the transmission resource of the reference signal, which can be used to indicate the specific time-frequency resources allocated and other related transmission parameters.

[0121] In some embodiments, the configuration information of the channel state information reporting can include reportQuantity, CSI-ReportConfig, and CSI-ReportSubConfig. The reportQuantity is used to indicate the specific information type of the report, such as a single CSI, multiple CSIs, or other related metrics; the CSI-ReportConfig is used to configure the detailed information of the CSI report, such as the reporting frequency, time slot, and the condition for triggering the report; and the CSI-ReportSubConfig provides more detailed configuration options, which can specify the format, accuracy, and other details of the report.

[0122] By determining the corresponding sparse basis matrix and measurement matrix for different first devices and second devices, the above method enables the compressed sensing technology to effectively recover the full channel state information.

[0123] The above embodiments only introduce and illustrate the technical solutions provided by the present application from the perspective of the interaction between the first device and the second device. The steps performed by the first device described above can be implemented alone to become a wireless communication method on the first device side. The steps performed by the second device described above can be implemented alone to become a wireless communication method on the second device side.

[0124] The following is a device embodiment of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0125] Please refer to FIG. 4, which shows a block diagram of a wireless communication device according to an embodiment of the present application. The device has the function of implementing the wireless communication method on the first device side described above, which can be implemented by hardware or by executing corresponding software by hardware. The device can be the first device introduced above or can be arranged in the first device. As shown in FIG. 4, the device 400 can include a receiving module 410 and a sending module 420.

[0126] The receiving module 410 is configured to receive a first reference signal, wherein the first reference signal is configured with M ports, the M ports are part of N maximum configurable ports, M is a positive integer less than N, and N is an integer greater than 1.

[0127] The sending module 420 is configured to send the first channel state information based on the determined reporting mode, wherein the first channel state information is obtained according to the first reference signal.

[0128] In some embodiments, the reporting mode is any one of the following: a first mode, the first channel state information corresponding to the first mode comprising partial channel state information measured according to the first reference signal, the partial channel state information comprising channel state information of the M ports; a second mode, the first channel state information corresponding to the second mode comprising full channel state information recovered by a compressive sensing technique; and a third mode, the first channel state information corresponding to the third mode comprising full channel state information recovered by a compressive sensing technique, wherein the full channel state information comprises channel state information of the N ports.

[0129] In some embodiments, the channel state information of the M ports comprises at least one of: spatial domain basis information corresponding to the M ports respectively; frequency domain basis information corresponding to the M ports respectively; weight coefficient information corresponding to the M ports respectively; weight coefficient information between the M ports; and inter-polarization phase corresponding to spatial domain basis information corresponding to the M ports respectively.

[0130] In some embodiments, when the reporting mode is the first mode, a measurement matrix related to the first reference signal is indicated by the first device to a second device; or when the reporting mode is the second mode or the third mode, the measurement matrix related to the first reference signal is indicated by the second device to the first device, wherein the second device is a device that transmits the first reference signal.

[0131] In some embodiments, the measurement matrix related to the first reference signal is a predefined matrix.

[0132] In some embodiments, the predefined matrix is related to at least one of: an antenna structure of the first device, and an antenna structure of a second device, wherein the second device is a device that transmits the first reference signal.

[0133] In some embodiments, the indication of the measurement matrix is transmitting the measurement matrix, or transmitting an index of the measurement matrix.

[0134] In some embodiments, the measurement matrix related to the first reference signal is a matrix obtained according to an AI model.

[0135] In some embodiments, the input data of the AI model comprises at least one of the following: an antenna configuration of the first device, an antenna structure of the first device, channel state information measured by the first device according to different reference signal configurations, full channel state information measured by the first device according to the N ports, a receiving antenna index of the first device, a timestamp of a measurement time of the first device, a sparse basis matrix corresponding to the full channel state information of the N ports, full channel state information recovered by the first device from partial channel state information measured according to the M ports, a horizontal antenna number of the first device, a vertical antenna number of the first device, a horizontal DFT oversampling number of the first device, a vertical DFT oversampling number of the first device, a number of antenna panels of a second device, an antenna configuration of the second device, an antenna structure of the second device, a reference signal configuration of the second device, and a timestamp corresponding to the reference signal configuration of the second device.

[0136] In some embodiments, the measurement matrix is indicated in the following manner: the measurement matrix is transmitted, or update information of the measurement matrix relative to a reference matrix is transmitted.

[0137] In some embodiments, the reporting mode is indicated by a high-layer signaling parameter or downlink control information.

[0138] In some embodiments, when the number of ports of the first reference signal configuration is the N ports, the reporting mode is a fourth mode, and the first channel state information corresponding to the fourth mode comprises full channel state information of the N ports measured.

[0139] In some embodiments, when the reporting mode is not the fourth mode, the first device is configured or instructed to fall back to the fourth mode, or the first device requests to fall back to the fourth mode.

[0140] In some embodiments, the sparse basis matrix corresponding to the full channel state information of the N ports is related to at least one of the following: a maximum configurable port number N, a configured port number M, a horizontal antenna number, a vertical antenna number, a horizontal DFT oversampling number, a vertical DFT oversampling number O2, and a number of antenna panels of a second device.

[0141] In some embodiments, the measurement matrix related to the first reference signal is related to at least one of the following: a maximum configurable port number N, a configured port number M, a number of horizontal direction antennas, a number of vertical direction antennas, a number of horizontal direction DFT oversampling, a number of vertical direction DFT oversampling O2, a number of antenna panels of the second device, configuration information of a reference signal resource, configuration information of channel state information reporting.

[0142] In summary, the technical scheme provided by the embodiments of the present application has the following advantages. On the one hand, the M ports of the first reference signal configuration are only part of the N maximum configurable ports, which reduces the number of ports for transmitting the first reference signal and reduces the transmission overhead of the reference signal. On the other hand, the first device can flexibly select a suitable reporting mode according to the feedback accuracy and feedback overhead requirements.

[0143] Please refer to FIG. 5, which shows a block diagram of a wireless communication device provided by another embodiment of the present application. The device has the function of implementing the wireless communication method of the first device side described above, which can be implemented by hardware or by executing corresponding software by hardware. The device can be the first device introduced above or can be arranged in the first device. As shown in FIG. 4, the device 500 can include a sending module 510 and a receiving module 520.

[0144] The sending module 510 is configured to send a first reference signal, the number of ports of the first reference signal configuration being M ports, the M ports being part of N maximum configurable ports, M being a positive integer less than N, and N being an integer greater than 1.

[0145] The receiving module 520 is configured to receive first channel state information sent based on a determined reporting mode, the first channel state information being obtained according to the first reference signal.

[0146] In some embodiments, the reporting mode is any one of the following: a first mode, the first channel state information corresponding to the first mode including part of the channel state information measured according to the first reference signal, the part of the channel state information including channel state information of the M ports; a second mode, the first channel state information corresponding to the second mode including full channel state information after sparse transformation recovered by a compressive sensing technology; and a third mode, the first channel state information corresponding to the third mode including full channel state information recovered by a compressive sensing technology, wherein the full channel state information includes channel state information of the N ports.

[0147] In some embodiments, the channel state information of the M ports comprises at least one of: spatial domain basis information corresponding to the M ports respectively; frequency domain basis information corresponding to the M ports respectively; weight coefficient information corresponding to the M ports respectively; weight coefficient information between the M ports; inter-polarization phase corresponding to the spatial domain basis information corresponding to the M ports respectively.

[0148] In some embodiments, when the reporting mode is the first mode, the first reference signal related measurement matrix is indicated by the first device to a second device; or, when the reporting mode is the second mode or the third mode, the first reference signal related measurement matrix is indicated by a second device to the first device; wherein the second device is a device that transmits the first reference signal.

[0149] In some embodiments, the first reference signal related measurement matrix is a predefined matrix.

[0150] In some embodiments, the predefined matrix is related to at least one of: an antenna structure of the first device, an antenna structure of a second device, wherein the second device is a device that transmits the first reference signal.

[0151] In some embodiments, the indication of the measurement matrix is transmitting the measurement matrix, or transmitting an index of the measurement matrix.

[0152] In some embodiments, the first reference signal related measurement matrix is a matrix obtained according to an AI model.

[0153] In some embodiments, the input data of the AI model comprises at least one of: an antenna configuration of the first device, an antenna structure of the first device, channel state information measured by the first device according to different reference signal configurations, full channel state information measured by the first device according to the N ports, a receiving antenna index of the first device, a timestamp of a measurement time of the first device, a sparse basis matrix corresponding to the full channel state information of the N ports, full channel state information recovered by the first device from partial channel state information measured by the first device according to the M ports, a horizontal antenna number of the first device, a vertical antenna number of the first device, a horizontal DFT oversampling number of the first device, a vertical DFT oversampling number of the first device, a number of antenna panels of a second device, an antenna configuration of the second device, an antenna structure of the second device, a reference signal configuration of the second device, a timestamp corresponding to the reference signal configuration of the second device.

[0154] In some embodiments, the indication of the measurement matrix is transmitting the measurement matrix, or transmitting update information of the measurement matrix relative to a reference matrix.

[0155] In some embodiments, the reporting mode is indicated by a high layer signaling parameter or downlink control information.

[0156] In some embodiments, when the number of ports of the first reference signal configuration is the N ports, the reporting mode is a fourth mode, and the first channel state information corresponding to the fourth mode includes full channel state information of the N ports measured.

[0157] In some embodiments, when the reporting mode is not the fourth mode, the first device is configured or instructed to fallback to the fourth mode, or the first device requests to fallback to the fourth mode.

[0158] In some embodiments, the full channel state information of the N ports corresponds to a sparse basis matrix related to at least one of the following: the maximum configurable number of ports N, the configured number of ports M, the number of horizontal antennas, the number of vertical antennas, the number of horizontal DFT oversampling, the number of vertical DFT oversampling O2, and the number of antenna panels of the second device.

[0159] In some embodiments, the measurement matrix related to the first reference signal is related to at least one of the following: the maximum configurable number of ports N, the configured number of ports M, the number of horizontal antennas, the number of vertical antennas, the number of horizontal DFT oversampling, the number of vertical DFT oversampling O2, the number of antenna panels of the second device, configuration information of the reference signal resource, and configuration information of the channel state information reporting.

[0160] In summary, the technical scheme provided by the embodiments of the present application, on the one hand, the M ports of the first reference signal configuration are only part of the maximum configurable N ports, which reduces the number of ports transmitting the first reference signal and reduces the transmission overhead of the reference signal. On the other hand, the first device can flexibly select a suitable reporting mode according to the requirements of feedback accuracy and feedback overhead.

[0161] It should be noted that the apparatus provided by the above embodiments in realizing its functions, only above each functional module is divided to illustrate by example, actual application, can be required according to actual need and the above function is allocated by different functional module to complete, namely the content structure of the device is divided into different functional modules, to complete the above description of all or part of the function.

[0162] With regard to the apparatus in the above embodiments, the specific manners in which various modules perform operations have been described in detail in the embodiments of the method, and thus will not be described in detail here. For details not described in detail in the apparatus embodiments, reference can be made to the method embodiments described above.

[0163] Please refer to FIG. 6, which shows a structural schematic diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 can be used to perform the method steps performed by the first device or the second device in the above embodiments. The communication device 600 can include a processor 601, a transceiver 602, and a memory 603. The processor 601 is configured to implement various processing functions of the communication device 600, such as generating information to be sent, processing information received, controlling transmission and / or reception, etc. The transceiver 602 is configured to implement the functions of transmission and / or reception, such as implementing the functions of the above-mentioned sending module and / or receiving module.

[0164] The processor 601 includes one or more processing cores. The processor 601 performs various processing functions by running software programs and modules.

[0165] The transceiver 602 can include a receiver and a transmitter. For example, the transceiver 602 can include a wired communication component, which can include a wired communication chip and a wired interface (such as an optical fiber interface). Optionally, the transceiver 602 can also include a wireless communication component, which can include a wireless communication chip and a radio frequency antenna.

[0166] The memory 603 can be connected to the processor 601 and the transceiver 602.

[0167] The memory 603 can be used to store computer programs executed by the processor. The processor 601 is configured to execute the computer programs to implement various steps performed by the communication device in the above method embodiments.

[0168] In addition, the memory 603 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, including but not limited to: magnetic or optical disks, electrically erasable programmable read-only memories, erasable programmable read-only memories, static random access memories, read-only memories, magnetic memories, flash memories, programmable read-only memories.

[0169] In some embodiments, when the communication device 600 is the first device, the transceiver 602 is configured to: receive a first reference signal, the first reference signal being configured with a port number of M ports, the M ports being all or part of a maximum configurable N ports, M being a positive integer less than or equal to N, N being an integer greater than 1; and transmit first channel state information based on the determined reporting mode, the first channel state information being obtained according to the first reference signal.

[0170] In some embodiments, when the communication device 600 is the second device, the transceiver 602 is configured to: transmit a first reference signal, the first reference signal being configured with a port number of M ports, the M ports being all or part of a maximum configurable N ports, M being a positive integer less than or equal to N, N being an integer greater than 1; and receive first channel state information transmitted based on the determined reporting mode, the first channel state information being obtained according to the first reference signal.

[0171] For details not specifically described in the present embodiment, reference can be made to the above embodiments, which will not be repeated here.

[0172] In addition, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: a magnetic or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static random access memory, a read-only memory, a magnetic storage, a flash memory, and a programmable read-only memory.

[0173] The embodiments of the present application also provide a computer readable storage medium, the storage medium storing a computer program, the computer program being used to be executed by a processor to implement the wireless communication method of the first device side or the wireless communication method of the second device side.

[0174] In some embodiments, the computer readable storage medium can include a ROM (Read-Only Memory), a RAM (Random-Access Memory), a SSD (Solid State Drives), an optical disk, etc. Among them, the random access memory can include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0175] The embodiments of the present application further provide a chip, which comprises a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the wireless communication method of the first device side or implement the wireless communication method of the second device side.

[0176] The embodiments of the present application further provide a computer program product, which comprises a computer program stored in a computer readable storage medium, and a processor reads and executes the computer program from the computer readable storage medium to implement the wireless communication method of the first device side or implement the wireless communication method of the second device side.

[0177] It should be understood that the "indication" mentioned in the embodiments of the present application can be direct indication, or indirect indication, or can be an indication of an associated relationship. For example, A indicates B, which can mean that B can be obtained by A; or A indirectly indicates B, for example, A indicates C, and B can be obtained by C; or A and B have an associated relationship.

[0178] In the description of the embodiments of the present application, the term "corresponding" can mean a direct or indirect corresponding relationship between the two, or an associated relationship between the two, or an indication and being indicated, configuration and being configured, etc.

[0179] In some embodiments of the present application, "predefined" can be realized by pre-storing corresponding codes, tables or other means for indicating related information in devices (for example, including terminal devices and network devices), and the specific implementation manner of the present application is not limited. For example, predefined can mean defined in a protocol.

[0180] In some embodiments of the present application, the "protocol" can refer to a standard protocol in the communication field, which can include BLE protocol, Wi-Fi protocol and related protocols applied to future communication systems, and the present application is not limited to this.

[0181] "Multiple" mentioned in the present text refers to two or more. "And / or" describes the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after it are in an "or" relationship.

[0182] "Greater than or equal to" mentioned in the present text can mean greater than or equal to, and "less than or equal to" can mean less than or equal to.

[0183] In addition, the step numbers described herein only exemplarily show a possible execution sequence between steps, and in some other embodiments, the above steps can also be executed in a sequence different from the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in a sequence opposite to the illustration, which is not limited in the embodiments of the present application.

[0184] Those skilled in the art can realize that, in one or more examples described above, the functions described in the embodiments of the present application can be implemented in hardware, software, firmware or any combination thereof. When implemented in software, the functions can be stored in a computer readable medium or transmitted as one or more instructions or codes on a computer readable medium. The computer readable medium includes computer storage medium and communication medium, and the communication medium includes any medium that facilitates the transfer of computer programs from one place to another. The storage medium can be any available medium accessible by a general or special purpose computer.

[0185] The above only describes exemplary embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method of wireless communication, the method comprising: The method is performed by a first device, and the method comprises: receiving a first reference signal, a number of ports configured for the first reference signal is M ports, the M ports are part of N maximum configurable ports, M is a positive integer less than N, and N is an integer greater than 1; based on the determined reporting mode, sending first channel state information, the first channel state information being obtained according to the first reference signal.

2. The method of claim 1, wherein, The reporting mode is any of the following: a first mode, the first mode corresponding to the first channel state information including part of the channel state information measured according to the first reference signal, the part of the channel state information including channel state information of the M ports; a second mode, the second mode corresponding to the first channel state information including sparse transformed full channel state information recovered through a compressive sensing technology; a third mode, the third mode corresponding to the first channel state information including full channel state information recovered through a compressive sensing technology; wherein the full channel state information includes channel state information of the N ports.

3. The method of claim 2, wherein, The channel state information of the M ports includes at least one of the following: spatial domain basis information corresponding to the M ports respectively; frequency domain basis information corresponding to the M ports respectively; weighting coefficient information corresponding to the M ports respectively; weighting coefficient information between the M ports; polarization inter-phase corresponding to the spatial domain basis information corresponding to the M ports respectively.

4. The method of claim 2 or 3, wherein, in a case where the reporting mode is the first mode, a measurement matrix related to the first reference signal is indicated by the first device to a second device; or, in a case where the reporting mode is the second mode or the third mode, the measurement matrix related to the first reference signal is indicated by a second device to the first device; wherein the second device is a device sending the first reference signal.

5. The method according to any one of claims 1 to 4, characterized in that, The measurement matrix related to the first reference signal is a predefined matrix.

6. The method of claim 5, wherein, The predefined matrix is related to at least one of the following: an antenna structure of the first device, an antenna structure of a second device, the second device being a device sending the first reference signal.

7. The method according to claim 5 or 6, characterized in that, The indication manner of the measurement matrix is: sending the measurement matrix, or sending an index of the measurement matrix.

8. The method according to any one of claims 1 to 4, characterized in that, The measurement matrix related to the first reference signal is a matrix obtained according to an artificial intelligence AI model.

9. The method of claim 8, wherein, The input data of the AI model comprises at least one of the following: an antenna configuration of the first device, an antenna structure of the first device, channel state information measured by the first device according to different reference signal configurations, full channel state information measured by the first device according to the N ports, a receiving antenna index of the first device, a timestamp of a measurement time of the first device, a sparse basis matrix corresponding to the full channel state information of the N ports, full channel state information recovered by the first device from partial channel state information measured according to the M ports, a horizontal antenna number of the first device, a vertical antenna number of the first device, a horizontal DFT oversampling number of the first device, a vertical DFT oversampling number of the first device, a number of antenna panels of a second device, an antenna configuration of the second device, an antenna structure of the second device, a reference signal configuration of the second device, and a timestamp corresponding to the reference signal configuration of the second device.

10. The method according to claim 8 or 9, characterized in that, The measurement matrix is indicated in the following manner: the measurement matrix is transmitted, or update information of the measurement matrix relative to a reference matrix is transmitted.

11. The method according to any one of claims 1 to 10, characterized in that, The reporting mode is indicated by a high-layer signaling parameter or downlink control information.

12. The method according to any one of claims 1 to 11, characterized in that, In a case where the number of ports of the first reference signal configuration is the N ports, the reporting mode is a fourth mode, and the first channel state information corresponding to the fourth mode comprises measured full channel state information of the N ports.

13. The method of claim 12, wherein, In a case where the reporting mode is not the fourth mode, the first device is configured or instructed to fall back to the fourth mode, or the first device requests to fall back to the fourth mode.

14. The method according to any one of claims 1 to 13, characterized in that, The sparse basis matrix corresponding to the full channel state information of the N ports is related to at least one of the following: a maximum configurable port number N, a configured port number M, a horizontal antenna number, a vertical antenna number, a horizontal DFT oversampling number, a vertical DFT oversampling number O2, and a number of antenna panels of a second device.

15. The method according to any one of claims 1 to 14, characterized in that, The measurement matrix related to the first reference signal is related to at least one of the following: a maximum configurable port number N, a configured port number M, a horizontal antenna number, a vertical antenna number, a horizontal DFT oversampling number, a vertical DFT oversampling number O2, a number of antenna panels of a second device, configuration information of a reference signal resource, and configuration information of channel state information reporting.

16. A method of wireless communication, the method comprising: The method is performed by a second device, and the method comprises: transmitting a first reference signal, a number of ports of the first reference signal being M ports, the M ports being partial ports in a maximum configurable N ports, M being a positive integer less than N, and N being an integer greater than 1; receiving first channel state information transmitted based on a determined reporting mode, the first channel state information being obtained according to the first reference signal.

17. The method of claim 16, wherein, The reporting mode is any one of the following: The first mode corresponds to the first channel state information including partial channel state information measured according to the first reference signal, and the partial channel state information includes channel state information of the M ports; The second mode corresponds to the first channel state information including sparse transformed full channel state information recovered through a compressive sensing technology; The third mode corresponds to the first channel state information including full channel state information recovered through a compressive sensing technology. The full channel state information includes channel state information of the N ports.

18. The method of claim 17, wherein, The channel state information of the M ports includes at least one of: Spatial domain basis information corresponding to the M ports respectively; Frequency domain basis information corresponding to the M ports respectively; Weighting coefficient information corresponding to the M ports respectively; Weighting coefficient information between the M ports; Inter-polarization phase corresponding to spatial domain basis information corresponding to the M ports respectively.

19. The method of claim 17 or 18, wherein, In a case where the reporting mode is the first mode, a measurement matrix related to the first reference signal is indicated by a first device to a second device; Or, In a case where the reporting mode is the second mode or the third mode, the measurement matrix related to the first reference signal is indicated by the second device to the first device; The first device is a device receiving the first reference signal.

20. The method according to any one of claims 16 to 19, characterized in that, The measurement matrix related to the first reference signal is a predefined matrix.

21. The method of claim 20, wherein, The predefined matrix is related to at least one of an antenna structure of the first device or an antenna structure of the second device.

22. The method of claim 20 or 21, wherein, The first device is a device receiving the first reference signal.

23. The method according to any one of claims 16 to 19, characterized in that, The indication manner of the measurement matrix is transmitting the measurement matrix or transmitting an index of the measurement matrix.

24. The method of claim 23, wherein, The measurement matrix related to the first reference signal is a matrix obtained according to an artificial intelligence (AI) model. Input data of the AI model includes at least one of an antenna configuration of the first device, an antenna structure of the first device, channel state information measured by the first device according to different reference signal configurations, full channel state information measured by the first device according to the N ports, a receiving antenna index of the first device, a timestamp of a measurement time of the first device, a sparse basis matrix corresponding to the full channel state information of the N ports, full channel state information recovered by the first device from partial channel state information measured according to the M ports, a horizontal direction antenna number of the first device, a vertical direction antenna number of the first device, a horizontal direction discrete Fourier transform (DFT) over-sampling number of the first device, a vertical direction DFT over-sampling number of the first device, a number of antenna panels of the second device, an antenna configuration of the second device, an antenna structure of the second device, a reference signal configuration of the second device, or a timestamp corresponding to the reference signal configuration of the second device.

25. The method of claim 23 or 24, wherein, The measurement matrix is indicated by sending the measurement matrix, or sending update information of the measurement matrix relative to a reference matrix.

26. The method according to any one of claims 16 to 25, characterized in that, The reporting mode is indicated by a high-layer signaling parameter or downlink control information.

27. The method of any one of claims 16 to 26, wherein, In a case where the number of ports of the first reference signal configuration is the N ports, the reporting mode is a fourth mode, and the first channel state information corresponding to the fourth mode includes full channel state information of the N ports measured.

28. The method of claim 27, wherein, In a case where the reporting mode is not the fourth mode, the second device configures or indicates the first device to fallback to the fourth mode, or the first device requests to fallback to the fourth mode.

29. The method according to any one of claims 16 to 28, characterized in that, The full channel state information of the N ports corresponds to a sparse basis matrix related to at least one of the following: a maximum configurable port number N, a configured port number M, a horizontal antenna number, a vertical antenna number, a horizontal DFT oversampling number, a vertical DFT oversampling number O2, and a number of antenna panels of the second device.

30. The method of any one of claims 16 to 29, wherein, The measurement matrix related to the first reference signal corresponds to at least one of the following: a maximum configurable port number N, a configured port number M, a horizontal antenna number, a vertical antenna number, a horizontal DFT oversampling number, a vertical DFT oversampling number O2, a number of antenna panels of the second device, configuration information of a reference signal resource, and configuration information of channel state information reporting.

31. A wireless communication device, comprising: The apparatus comprises: a receiving module configured to receive a first reference signal, a number of ports of the first reference signal configuration being M ports, the M ports being part of N ports that are maximum configurable, M being a positive integer less than N, N being an integer greater than 1; a sending module configured to send first channel state information based on the determined reporting mode, the first channel state information being obtained according to the first reference signal. The apparatus comprises:

32. A wireless communication device, comprising: a sending module configured to send a first reference signal, a number of ports of the first reference signal configuration being M ports, the M ports being part of N ports that are maximum configurable, M being a positive integer less than N, N being an integer greater than 1; a receiving module configured to receive first channel state information sent based on the determined reporting mode, the first channel state information being obtained according to the first reference signal. The communication device comprises a processor and a memory, the memory storing a computer program, and the processor executes the computer program to implement the method of any one of claims 1 to 15, or implement the method of any one of claims 16 to 30.

33. A communications device, characterized by The storage medium stores a computer program, and the computer program is used to be executed by a processor to implement the method of any one of claims 1 to 15, or implement the method of any one of claims 16 to 30.

34. A computer-readable storage medium, characterized in that, The chip comprises a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the method of any one of claims 1 to 15, or implement the method of any one of claims 16 to 30.

35. A chip, comprising: ​ 36. A computer program product, characterised in that, The computer program product comprises a computer program stored in a computer readable storage medium, which computer program is readable and executable by a processor to implement the method of any one of claims 1 to 15, or to implement the method of any one of claims 16 to 30.

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