Signal transmission method and apparatus, and terminal device, network device, chip, storage medium and program product

Abstract

Provided in the embodiments of the present application are a signal transmission method and apparatus, and a terminal device, a network device, a chip, a storage medium and a computer program product. The method comprises: a terminal device receiving first information, wherein the first information is used for determining the number of first receiving antennas and / or the number of first transmitting antennas, the number of first receiving antennas is less than the number of receiving antennas supported by the terminal device, and the number of first transmitting antennas is less than the number of transmitting antennas supported by the terminal device; and the terminal device sending an SRS, wherein the number of ports via which the terminal device sends the SRS matches the number of first receiving antennas and / or the number of first transmitting antennas.

Description

Signal transmission method and device, terminal device, network device, chip, storage medium, program product TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of mobile communication technology, in particular to a signal transmission method and device, a terminal device, a network device, a chip, a storage medium, and a computer program product. BACKGROUND

[0002] Currently, in a new radio (NR) system, a network device can obtain downlink channel information by measuring sounding reference signals (SRS) based on channel reciprocity. For a terminal device with a number of transmit antennas less than a number of receive antennas, the terminal device can transmit SRS in an antenna switching manner, so that the network device can also obtain the downlink channel information of the terminal device based on channel reciprocity.

[0003] With the rapid development of antenna technology, a terminal device can support a larger scale of antenna deployment. If the antenna switching manner is used to obtain the downlink channel information of the terminal device, the network device needs to configure SRS resources conforming to the larger scale of antenna structure for the terminal device, which will cause a large SRS resource overhead.

[0004] In addition, for beam management, a terminal device needs to transmit SRS for beam management. With the increase in the number of transmit antennas, the network device also needs to configure more SRS resources for the terminal device, and the SRS resource overhead will increase significantly. Therefore, how to reduce the SRS resource overhead is a problem to be solved urgently.

[0005] SUMMARY

[0006] The present application provides a signal transmission method and device, a terminal device, a network device, a chip, a storage medium, and a computer program product.

[0007] In a first aspect, a signal transmission method is provided, comprising:

[0008] A terminal device receives first information, wherein the first information is used to determine a first number of receive antennas and / or a first number of transmit antennas; the first number of receive antennas is less than a number of receive antennas supported by the terminal device, and the first number of transmit antennas is less than a number of transmit antennas supported by the terminal device;

[0009] The terminal device transmits a sounding reference signal (SRS); and a number of ports of the SRS transmitted by the terminal device matches the first number of receive antennas and / or the first number of transmit antennas.

[0010] In a second aspect, a signal transmission method is provided, comprising:

[0011] sending, by a network device, first information to a terminal device; the first information is used by the terminal device to determine a first number of receive antennas and / or a first number of transmit antennas; the first number of receive antennas is less than a number of receive antennas supported by the terminal device, and the first number of transmit antennas is less than a number of transmit antennas supported by the terminal device;

[0012] receiving, by the network device, a sounding reference signal (SRS) sent by the terminal device; a number of ports used by the terminal device to send the SRS matches the first number of receive antennas and / or the first number of transmit antennas.

[0013] In a third aspect, a signal transmission apparatus is provided, which is applied to a terminal device and includes:

[0014] a first receiving unit configured to receive first information, the first information being used to determine a first number of receive antennas and / or a first number of transmit antennas; the first number of receive antennas is less than a number of receive antennas supported by the terminal device, and the first number of transmit antennas is less than a number of transmit antennas supported by the terminal device;

[0015] a first sending unit configured to send a sounding reference signal (SRS); a number of ports used by the terminal device to send the SRS matches the first number of receive antennas and / or the first number of transmit antennas.

[0016] In a fourth aspect, a signal transmission apparatus is provided, which is applied to a network device and includes:

[0017] a second sending unit configured to send first information; the first information is used by the terminal device to determine a first number of receive antennas and / or a first number of transmit antennas; the first number of receive antennas is less than a number of receive antennas supported by the terminal device, and the first number of transmit antennas is less than a number of transmit antennas supported by the terminal device;

[0018] a second receiving unit configured to receive a sounding reference signal (SRS) sent by the terminal device; a number of ports used by the terminal device to send the SRS matches the first number of receive antennas and / or the first number of transmit antennas.

[0019] In a fifth aspect, a communication device is provided, which includes a processor and a memory. The memory is used to store a computer program, and the processor is used to invoke and run the computer program stored in the memory to execute the signal transmission method of any one of the first aspect and the second aspect.

[0020] In a sixth aspect, a computer readable medium is provided, which stores program codes for execution by a device, and the program codes include instructions for executing the signal transmission method of any one of the first aspect and the second aspect.

[0021] In a seventh aspect, a system chip is provided, which includes an input interface, an output interface, a processor, and a memory. The processor is configured to execute code in the memory. When the code is executed, the processor can implement the signal transmission method according to any one of the first aspect and the second aspect.

[0022] In the signal transmission method provided in the present application, the terminal device can receive first information, which is used to determine a first number of receiving antennas and / or a first number of transmitting antennas. The first number of receiving antennas is less than the number of receiving antennas supported by the terminal device, and the first number of transmitting antennas is less than the number of transmitting antennas supported by the terminal device. The terminal device transmits SRS. The number of ports used by the terminal device to transmit the SRS matches the first number of receiving antennas and / or the first number of transmitting antennas. It can be understood that the terminal device can use a number of antennas less than the actual supported number of antennas to transmit SRS, that is, the terminal device can use part of the antenna ports to transmit SRS. In this way, the network device can configure less SRS resources for the terminal device, thereby saving SRS resource overhead. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0024] FIG. 1 is a schematic diagram of a communication architecture according to an embodiment of the present application;

[0025] FIG. 2 is a schematic diagram of 2T4R antenna switching according to an embodiment of the present application;

[0026] FIG. 3A is a schematic diagram of a downlink beam sweeping process according to an embodiment of the present application;

[0027] FIG. 3B is a schematic diagram of a downlink beam sweeping process according to an embodiment of the present application;

[0028] FIG. 3C is a schematic diagram of a downlink beam sweeping process according to an embodiment of the present application;

[0029] FIG. 4 is a schematic diagram of a signal transmission method according to an embodiment of the present application;

[0030] FIG. 5 is a schematic diagram of a signal transmission method according to an embodiment of the present application;

[0031] FIG. 6 is a schematic diagram of an antenna structure according to an embodiment of the present application;

[0032] FIG. 7 is a schematic diagram of an antenna structure according to an embodiment of the present application;

[0033] FIG. 8A is a flowchart of a signal transmission method according to an embodiment of the present application;

[0034] FIG. 8B is a flowchart of a signal transmission method according to an embodiment of the present application;

[0035] FIG. 9 is a schematic structural diagram of a signal transmission apparatus 900 according to an embodiment of the present application;

[0036] FIG. 10 is a schematic structural diagram of a signal transmission apparatus 1000 according to an embodiment of the present application;

[0037] FIG. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0038] FIG. 12 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0039] FIG. 13 is a schematic block diagram of a communication system according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0041] The technical solutions in the embodiments of the present application can be applied to various communication systems, such as a Long Term Evolution (LTE) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunication System (UMTS) system, an Internet of Things (IoT) system, a Narrow Band Internet of Things (NB-IoT) system, an enhanced Machine-Type Communications (eMTC) system, a 5G communication system (also referred to as a New Radio (NR) communication system), or a future communication system.

[0042] FIG. 1 is a schematic diagram of a communication architecture according to an embodiment of the present application. As shown in FIG. 1, a communication system 100 can include a terminal device 110 and a network device 120. The network device 120 can communicate with the terminal device 110 over an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0043] It should be understood that the embodiments of the present application are only exemplarily described with respect to the communication system 100, but the embodiments of the present application are not limited thereto.

[0044] In the communication system 100 shown in FIG. 1, the network device 120 can be an access network device which communicates with the terminal device 110. The access network device can provide communication coverage for a specific geographic area and can communicate with the terminal device 110 (for example, UE) located in the coverage area.

[0045] The network device 120 can be an evolved node B (eNB or eNodeB) in a long term evolution (LTE) system, or a next generation radio access network (NG RAN) device, or a base station (gNB) in an NR system, or a radio controller in a cloud radio access network (CRAN), or a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved public land mobile network (PLMN) and the like.

[0046] The terminal device 110 can be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0047] For example, the terminal device 110 can refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user apparatus. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, an IoT device, a satellite handset, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved network, and the like.

[0048] The wireless communication system 100 can further include a core network device 130 in communication with the network device 120, which can be a 5G core network (5GC) device, e.g., an Access and Mobility Management Function (AMF), e.g., an Authentication Server Function (AUSF), e.g., a User Plane Function (UPF), e.g., a Session Management Function (SMF). Alternatively, the core network device 130 can also be an Evolved Packet Core (EPC) device of an LTE network, e.g., a Session Management Function + Core Packet Gateway (SMF + PGW-C) device. It should be understood that the SMF + PGW-C can implement the functions of both the SMF and the PGW-C. In the process of network evolution, the above-mentioned core network device can also be called by other names, or new network entities can be formed by dividing the functions of the core network, which are not limited by the embodiments of the present application.

[0049] The various functional units in the communication system 100 can also be connected and communicate through a next generation (NG) interface.

[0050] FIG. 1 exemplarily shows one network device, one core network device and two terminal devices. Alternatively, the wireless communication system 100 can include multiple network devices and each network device can include other numbers of terminal devices within its coverage, which are not limited by the embodiments of the present application.

[0051] It should be noted that FIG. 1 only schematically shows a system to which the embodiments of the present application are applied in an exemplary manner. Of course, the method shown in the embodiments of the present application can also be applied to other systems. In addition, the terms "system" and "network" are often used interchangeably in the present application. The term "and / or" in the present application is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects. It should also be understood that the "indication" mentioned in the embodiments of the present application can be direct indication or indirect indication, and can also mean an associated relationship. For example, A indicates B, which can mean that B can be obtained by A directly; 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. It should also be understood that the "correspondence" mentioned in the embodiments of the present application can mean a direct correspondence or an indirect correspondence between the two, or can mean an associated relationship between the two, or can mean an indication and being indicated, a configuration and being configured, and the like. It should also be understood that the "predefined" or "predefined rule" mentioned in the embodiments of the present application 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, the predefinition can mean the definition in the protocol. It should also be understood that the "protocol" in the embodiments of the present application can mean a standard protocol in the communication field, for example, can include the LTE protocol, the NR protocol and the related protocol applied to the future communication system, and the present application is not limited thereto.

[0052] In order to facilitate the understanding of the technical solutions of the embodiments of the present application, the related technologies of the embodiments of the present application are described below. The following related technologies can be combined with the technical solutions of the embodiments of the present application in any manner, and all belong to the protection scope of the embodiments of the present application.

[0053] 1, Sounding Reference Signal (SRS)

[0054] The SRS is a kind of reference signal sent by a terminal device.

[0055] In NR, the network device can obtain uplink (UL) channel information by using SRS. In a time division duplex (TDD) system, the network device can also obtain downlink (DL) channel information by measuring SRS through channel reciprocity. In this way, the network device can obtain UL and DL channel information by using SRS.

[0056] The network device can configure an SRS resource for the terminal device, and the SRS resource can be used to configure transmission attributes of the SRS, for example, time-frequency resource location, port mapping relationship, power factor, scrambling code, and the like. For details, refer to the prior art. The terminal device can send the SRS based on the SRS resource, and the network device can receive the SRS sent by the terminal device based on the SRS resource.

[0057] One reference signal resource can include one or more (Resource Block, RB).

[0058] NR Release 15 (Rel-15) supports 64 SRS bandwidth configuration modes, and the minimum bandwidth of one SRS resource is 4 RBs, and the maximum bandwidth is 272 RBs.

[0059] In addition, the network device can configure different SRS resource sets for the terminal device for different SRS purposes, and indicate the purpose of the SRS resource set through high-layer signaling. For example, the SRS resource set can be used for antenna switching. In order to avoid wasting resources in the implementation of the target function, the NR system regulates the number of SRS resource sets and the configuration of the SRS resource set for different purposes. The maximum number of SRS resources that one SRS resource set can contain and the maximum number of SRS ports that an SRS resource can contain depend on the capability of the terminal device and the purpose of the SRS resource set.

[0060] 2. Antenna switching

[0061] The NR system supports the network device to obtain downlink channel information by measuring the SRS through channel reciprocity. Due to the limitation of cost and hardware, the number of antennas (i.e., transmit antennas) simultaneously transmitted by the terminal device can be less than the number of antennas (i.e., receive antennas) simultaneously received, so that different terminal devices have different antenna transmission and reception capabilities.

[0062] For terminal devices with a smaller number of transmit antennas than receive antennas, the terminal device can send SRS through antenna switching, so that the network device can also obtain the downlink channel information of the terminal device through channel reciprocity.

[0063] 3. Antenna transmission and reception capability of the terminal device

[0064] The number of antennas of the terminal device can be represented as xTyR, where x represents the number of transmit antennas, T represents transmit (T), y represents the number of receive antennas, and R represents receive (R).

[0065] The antenna transceiving capability of the terminal device can include: the number of transmitting antennas is the same as the number of receiving antennas (i.e., T = R), the number of transmitting antennas is 1 and the number of receiving antennas is 2 (i.e., 1T2R), the number of transmitting antennas is 1 and the number of receiving antennas is 4 (i.e., 1T4R), and the number of transmitting antennas is 2 and the number of receiving antennas is 4 (i.e., 2T4R).

[0066] For different antenna transceiving capabilities, the network device can configure the terminal device with an SRS resource set in which way, which can be used by the network device to obtain the downlink channel information of the terminal device by using channel reciprocity.

[0067] 1) T = R: The network device configures the terminal device with at most 2 SRS resource sets, each SRS resource set contains one SRS resource, and the number of antenna ports of the SRS is 1, 2, or 4.

[0068] 2) 1T2R: The network device configures the terminal device with at most 2 SRS resource sets, and each SRS resource set contains 2 SRS resources transmitted in different OFDM symbols, and the number of antenna ports of each SRS resource is 1.

[0069] 3) 2T4R: The network device configures the terminal device with at most 2 SRS resource sets, and each SRS resource set contains 2 SRS resources transmitted in different OFDM symbols, and each SRS resource has two antenna ports

[0070] Exemplarily, FIG. 2 shows a 2T4R antenna switching diagram, the terminal device can only use two antennas to transmit SRS at the same time, therefore, the terminal device can send SRS on the four transmitting antennas in turn.

[0071] 4. Beam management of NR

[0072] The beam management in NR can be divided into uplink and downlink beam management.

[0073] For downlink beam management, including downlink beam sweeping, terminal device beam measurement and reporting, network device downlink beam indication, etc.

[0074] For uplink beam management, including uplink beam sweeping (terminal device sending beam sweeping SRS), network device beam measurement, and network device uplink beam indication and configuration of the terminal device.

[0075] Exemplarily, referring to the downlink beam scanning process diagrams shown in FIG. 3A to FIG. 3C, the downlink beam scanning can be divided into three processes. Referring to the first process diagram of the downlink beam scanning shown in FIG. 3A, in the first process of the downlink scanning, the network device scans different transmission beams, and the terminal device scans different reception beams. Referring to the second process diagram of the downlink beam scanning shown in FIG. 3B, in the second process, the network device scans different transmission beams, and the terminal device uses the same reception beam. Referring to the third process diagram of the downlink beam scanning shown in FIG. 3C, in the third process, the network device uses the same transmission beam, and the terminal device scans different reception beams; generally, the network device completes the above beam scanning process by sending downlink reference signals (such as synchronization signal block SSB and / or channel state information reference signal CSI-RS).

[0076] The beam reporting mechanism in NR Rel-15 refers to that the terminal device selects K transmission beams with the highest L1-RSRP and their performances by measuring multiple transmission beams (P2 process) or transmission-reception beam pairs (P1 process), and reports them to the network device in the form of CSI.

[0077] After decoding the beam information reported by the terminal device, the network device considers the downlink transmission channel and signal, and carries the TCI state (including SSB or CSI-RS resource index as the reference of the UE) through MAC and / or DCI signaling to indicate the beam information to the terminal device. The terminal device uses the reception beam corresponding to the transmission beam of the indicated SSB or CSI-RS for downlink reception.

[0078] Correspondingly, the uplink beam scanning can also include three processes, namely U1, U2 and U3. The U1 process refers to that the terminal device scans different transmission beams, and the network device scans different reception beams; the U2 process refers to that the terminal device uses the same transmission beam, and the network device scans different reception beams; the U3 process refers to that the terminal device scans different transmission beams, and the network device uses the same reception beam.

[0079] For the uplink beam scanning process, since the network device measures the beams from the terminal device, the beam reporting of the terminal device is not required. The network device selects the uplink beam that it considers appropriate from the measured uplink beams and indicates or configures it to the terminal device for uplink transmission. At the same time, the network device is also ready with the corresponding reception beam.

[0080] 5, Compressive sensing technology

[0081] The Nyquist sampling theorem in communication principle or signal and system, that is, to make the digital signal after sampling completely retain the information in the original signal, the sampling frequency must be greater than 2 times the highest frequency in the signal. The reason is that the time domain is sampled at intervals of τ, and the frequency domain will have periodic extension with a period of 1 / τ. Then if the sampling frequency is lower than twice the highest frequency of the signal, the signal will alias after frequency spectrum shift in the frequency domain.

[0082] The compressive sensing theory believes that if the signal is sparse, it can be recovered by far lower than the sampling theorem requirement. At present, compressive sensing is widely used in signal and image processing field. Compressive sensing is based on the sparsification of the target signal and the selection of a suitable measurement matrix, which simultaneously samples and compresses the sparse signal. Only a small amount of data needs to be transmitted, and the receiving end restores the signal according to the corresponding recovery matrix. Compressive sensing theory has also shown superior performance in channel estimation.

[0083] It should be understood that in the NR system, the network device side utilizes channel reciprocity to obtain downlink channel information by measuring SRS. In order to support terminal devices with a number of transmit antennas less than a number of receive antennas to obtain downlink information through channel reciprocity, the terminal device transmits SRS in an antenna switching manner.

[0084] However, when the terminal device side can support larger-scale antenna deployment, the SRS antenna switching manner is used to obtain downlink channel quality, and the network device needs to configure SRS resources conforming to the larger-scale antenna structure for the terminal device, which will bring a large SRS resource overhead. Exemplarily, if the terminal device supports 32 receive antennas, and the antenna transceiver capability is configured as 1T32R, the network device needs to configure 32 single-port SRS resources for the terminal device to support 1T32R antenna switching, which has a large SRS resource overhead, and each SRS resource needs to have a time interval of 1 symbol, which will also bring a large delay.

[0085] In addition, for beam management, the terminal device needs to send SRS for beam management. With the increase of the number of transmit antennas, the network device also needs to configure more SRS resources for the terminal device, and the SRS resource overhead will increase significantly.

[0086] Therefore, how to reduce the SRS resource overhead is a problem to be solved at present.

[0087] Based on this, the embodiment of the present application provides a signal transmission method, wherein a terminal device receives first information, the first information is used to determine a first receiving antenna number and / or a first transmitting antenna number; the first receiving antenna number is less than a receiving antenna number supported by the terminal device, and the first transmitting antenna number is less than a transmitting antenna number supported by the terminal device; the terminal device transmits an SRS; and a port number of the SRS transmitted by the terminal device matches the first receiving antenna number and / or the first transmitting antenna number. It can be understood that the terminal device can use an antenna number less than an actually supported antenna number to transmit the SRS, that is, the terminal device can use part of antenna ports to transmit the SRS. In this way, the network device can configure less SRS resources for the terminal device, thereby saving SRS resource overhead.

[0088] In order to facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined with the technical solutions of the embodiments of the present application as optional solutions, 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.

[0089] It should be noted that in the embodiments of the present application, the receiving antenna can also be referred to as an antenna port, and the two are equivalent or replaceable. The transmitting antenna can also be referred to as a sending antenna, or an SRS port, and the three are equivalent or replaceable.

[0090] FIG. 4 shows a signal transmission method provided by an embodiment of the present application, which can include:

[0091] S410, a network device transmits first information, and correspondingly, a terminal device receives the first information.

[0092] The first information is used to determine a first receiving antenna number and / or a first transmitting antenna number; the first receiving antenna number is less than a receiving antenna number supported by the terminal device, and the first transmitting antenna number is less than a transmitting antenna number supported by the terminal device.

[0093] S420, the terminal device transmits an SRS, and correspondingly, the network device receives the SRS transmitted by the terminal device. A port number of the SRS transmitted by the terminal device matches the first receiving antenna number and / or the first transmitting antenna number.

[0094] It should be understood that the terminal device in the embodiments of the present application can support multiple antennas, or the terminal device in the embodiments of the present application can be a terminal device deploying a large-scale antenna. The terminal device can support multiple transmitting antennas, or support multiple receiving antennas, or support multiple transmitting antennas and multiple receiving antennas.

[0095] Exemplarily, the number of antennas supported by the terminal device can be represented as xTyR. Wherein, x represents the number of transmit antennas supported by the terminal device, and x is a positive integer greater than or equal to 1. For example, x can be 1, 2, 3, 4, 6, 8, etc., and the embodiments of the present application do not make any limitation in this regard. In addition, y represents the number of receive antennas supported by the terminal device, and y can be 2n, where n is a positive integer greater than or equal to 1. For example, n can be a positive integer greater than or equal to 4 or 6, and the embodiments of the present application do not make any limitation in this regard.

[0096] It should be noted that the number of transmit antennas and the number of receive antennas supported by the terminal device can be the same or different. Exemplarily, the number of transmit antennas supported by the terminal device is less than the number of receive antennas supported by the terminal device.

[0097] In the embodiments of the present application, the terminal device can determine the first number of receive antennas and / or the first number of transmit antennas according to the first information sent by the network device. In this way, the terminal device can send SRS according to / through the determined first number of receive antennas and / or the first number of transmit antennas.

[0098] It should be noted that the terminal device sends SRS according to / through the first number of receive antennas and / or the first number of transmit antennas, which can be understood as that the terminal device sends SRS through a number of ports matched with the first number of receive antennas and / or the first number of transmit antennas, or the terminal device sends SRS according to a number of SRS ports matched with the first number of receive antennas and / or the first number of transmit antennas.

[0099] In the embodiments of the present application, the first number of receive antennas is less than the number of receive antennas supported by the terminal device, and the first number of transmit antennas is less than the number of transmit antennas supported by the terminal device. Exemplarily, the number of antennas supported by the terminal device is 1T32R, and the network device can configure the terminal device with the number of antennas as 1T8R through the first information. Or, the number of antennas supported by the terminal device is 4T32R, and the network device can configure the terminal device with the number of antennas as 2T4R through the first information.

[0100] It can be understood that the terminal device can use a number of antennas less than the actual supported number of antennas to send SRS, that is, the terminal device can use part of the antenna ports to send SRS. In this way, the network device can configure the terminal device with less SRS resource, thereby saving the SRS resource overhead.

[0101] The multiple receive antennas supported by the terminal device can be arranged at different positions of the terminal device, or different antenna panels, for example, the multiple receive antennas can be uniformly distributed on the upper side, lower side, left side and right side of the terminal device. Similarly, the multiple transmit antennas supported by the terminal device can be arranged at different positions of the terminal device. Based on this, the multiple receive antennas or the multiple transmit antennas supported by the terminal device can be grouped to obtain multiple transmit antenna port groups and multiple receive antenna port groups.

[0102] It should be understood that in actual application, some of the transmit / receive antenna ports in some of the transmit / receive antenna port groups can be blocked, and thus the channel conditions are poor and the transmit / receive antenna ports cannot be used for data transmission. Alternatively, some of the transmit / receive antenna ports in some of the transmit / receive antenna port groups are in a non-working mode / energy saving mode and cannot be used for data transmission.

[0103] It should be noted that the terminal device determines to use some antenna ports to send the SRS according to the first number of receive antennas and / or the first number of transmit antennas, and the some antenna ports can be transmit / receive antenna ports that are not blocked or transmit / receive antenna ports that are in a working mode / energy saving mode.

[0104] In some embodiments, with reference to FIG. 5, the signal sending method provided by the embodiments of the present application can further include the following steps:

[0105] S430, the network device determines part of the channel state information of the terminal device based on the measurement result of the SRS;

[0106] S440, the network device recovers all the channel state information of the terminal device based on the part of the channel state information.

[0107] It can be understood that the terminal device sends the SRS according to / through the first number of receive antennas and / or the first number of transmit antennas, that is, the terminal device sends the SRS through some antenna ports, and correspondingly, the network device can measure the SRS sent by the terminal device through the some antenna ports to obtain part of the channel state information of the terminal device.

[0108] It should be noted that the part of the channel state information can be referred to as compressed channel state information, or compressed channel information, and the three are equivalent or replaceable.

[0109] In the embodiments of the present application, the network device can recover all the channel state information based on the part of the channel state information.

[0110] In some embodiments, the network device can use an artificial intelligence (AI) algorithm to obtain all the channel state information based on the part of the channel state information by using a trained neural network model.

[0111] In some embodiments, the network device can use a compressive sensing algorithm to recover the full channel state information based on the partial channel state information, using a sparse basis and / or a measurement matrix matched to the antenna structure of the terminal device. The system model for recovering the full channel state information based on the compressive sensing technology can refer to the following formula 1. y = X * h + z (1)

[0112] Wherein, X is the measurement matrix, which can be composed of a sparse basis; h is the uplink / downlink full channel state information, with a dimension of N*1, y is the received signal, which is the uplink / downlink partial channel state information measured by the terminal device according to the SRS, and z is the noise. It should be understood that when h is sparse in a certain sparse transform domain, the full channel state information can be recovered by the measurement matrix X and the compressive sensing algorithm. The measurement matrix X can be related to the SRS, and the dimension of X can be M*N.

[0113] It should be noted that the sparse basis and / or the measurement matrix matched to the antenna structure of the terminal device can also be understood as the sparse basis and / or the measurement matrix related to the SRS of the terminal device, which are equivalent or replaceable.

[0114] In some embodiments, the sparse basis and / or the measurement matrix matched to the terminal device are related to one or more of the following:

[0115] The number of transmit antennas supported by the terminal device;

[0116] The number of receive antennas supported by the terminal device;

[0117] The receive antenna port grouping information of the terminal device;

[0118] The transmit antenna port grouping information of the terminal device;

[0119] The number of receive antennas in the horizontal direction;

[0120] The number of receive antennas in the vertical direction;

[0121] The number of transmit antennas in the horizontal direction;

[0122] The number of transmit antennas in the vertical direction;

[0123] The number of DFT oversampling in the horizontal direction;

[0124] The number of DFT oversampling in the vertical direction.

[0125] It should be noted that the plurality of receiving antennas supported by the terminal device can be arranged at different positions of the terminal device, or different antenna panels, for example, the plurality of receiving antennas can be uniformly distributed on the upper side, lower side, left side and right side of the terminal device. Similarly, the plurality of transmitting antennas supported by the terminal device can be arranged at different positions of the terminal device. Based on this, the plurality of receiving antennas or the plurality of transmitting antennas supported by the terminal device can be grouped to obtain the transmitting antenna port grouping information and the receiving antenna port grouping information.

[0126] The receiving antenna port grouping information can include the number of receiving antenna port groups (i.e. how many receiving antenna port groups), the number of receiving antenna ports included in each receiving antenna port group, etc., which are not limited by the embodiments of the present application.

[0127] Similarly, the transmitting antenna port grouping information can include the number of transmitting antenna port groups (i.e. how many transmitting antenna port groups), the number of transmitting antenna ports included in each transmitting antenna port group, etc., which are not limited by the embodiments of the present application.

[0128] In some embodiments, the terminal device can determine the sparse basis and / or measurement matrix matching the antenna structure of the terminal device according to the above information. Further, the terminal device can report the sparse basis and / or measurement matrix to the network device in advance. In this way, the network device can restore the obtained partial channel state information to the full channel state information based on the sparse basis and / or measurement matrix.

[0129] In some embodiments, the terminal device can directly report the above information related to the sparse basis and / or measurement matrix matching the terminal device to the network device, so that the network device can determine the sparse basis and / or measurement matrix matching the antenna structure of the terminal device according to the above information. Further, the terminal device restores the obtained partial channel state information to the full channel state information based on the sparse basis and / or measurement matrix.

[0130] It can be understood that in the embodiments of the present application, the terminal device can send SRS through part of the antennas, the network device can obtain partial channel state information based on the SRS sent by part of the antennas, and then restore the full channel state information of the terminal device based on the partial channel state information. In this way, the network device can configure less SRS resources for the terminal device, so that the terminal device sends SRS on part of the antennas, thereby reducing the resource overhead of SRS and improving the system resource efficiency.

[0131] It should be noted that in the embodiments of the present application, the first number of receiving antennas and / or the first number of transmitting antennas are used for antenna switching; or the first number of transmitting antennas is used for beam management.

[0132] In one scenario (hereinafter referred to as scenario 1), the first number of receive antennas and / or the first number of transmit antennas can be used for antenna switching. It can be understood that the terminal device can send SRSs in the manner of antenna switching according to the determined first number of receive antennas and / or the first number of transmit antennas.

[0133] It should be noted that the terminal device sends SRSs on part of the antennas based on the first number of transmit antennas and / or the first number of receive antennas, that is, the network device obtains part of the uplink channel state information of the terminal device by measuring the SRSs. In some embodiments, the network device can recover the entire uplink channel state information based on the part of the uplink channel state information, and then obtain the downlink channel state information based on the entire uplink channel state information through channel reciprocity. In other embodiments, the network device can obtain part of the downlink channel state information based on the part of the uplink channel state information based on channel reciprocity, and then the network device recovers the entire downlink state information based on the part of the downlink channel state information.

[0134] In an example, the first information can be used to determine the first number of receive antennas. For example, the terminal device supports 1T32R, and the terminal device can determine the first number of receive antennas to be 8 through the first information. That is, the terminal device can perform antenna switching with the antenna transceiving capability of 1T8R, that is, the terminal device sends SRSs on 8 receive antennas in turn, and only one receive antenna is used to send SRSs at the same time.

[0135] In another example, the first information can be used to determine the first number of transmit antennas. For example, the terminal device supports 4T8R, and the terminal device can determine the first number of transmit antennas to be 2 through the first information. That is, the terminal device can perform antenna switching with the antenna transceiving capability of 2T4R, that is, the terminal device sends SRSs on 8 receive antennas in turn, and 2 receive antennas are used to send SRSs at the same time.

[0136] In yet another example, the first information can be used to determine the first number of receive antennas and the first number of transmit antennas. For example, the terminal device supports 4T32R, and the terminal device can determine the first number of transmit antennas to be 2 and the first number of receive antennas to be 8 through the first information. That is, the terminal device can perform antenna switching with the antenna transceiving capability of 2T8R, that is, the terminal device sends SRSs on 8 receive antennas in turn, and 2 receive antennas are used to send SRSs at the same time.

[0137] In another scenario (hereinafter referred to as scenario 2), the first number of transmit antennas is used for SRS beam management. It can be understood that the terminal device can send SRSs according to the first number of transmit antennas, and each SRS can be associated with a beam.

[0138] In this way, the network device can determine part of the channel state information according to the measurement result of the SRS sent by the terminal device. Further, the network device can recover all channel state information based on the part of the channel state information (also can be understood as recovering all beams based on part of the beams), so as to determine the optimal beam based on all channel state information.

[0139] For example, the terminal device supports 8 transmit antennas. The terminal device can determine that the first number of transmit antennas is 4 through the first information, so that the terminal device sends the SRS through 4 transmit antennas. Correspondingly, the network device can receive the SRS sent by the terminal device through 4 transmit antennas, obtain part of the channel state information, and further recover all channel state information based on the part of the channel state information. The network device can determine the optimal beam based on all channel state information, and implement beam management.

[0140] In some embodiments, the first information can further include a first SRS bandwidth; the first SRS bandwidth is less than the SRS bandwidth supported by the terminal device.

[0141] It should be understood that in the centimeter wave frequency band, the bandwidth of the SRS will increase. Correspondingly, the resource overhead of the SRS will also increase accordingly. Based on this, in the embodiments of the present application, the network device can configure the terminal device to send the SRS bandwidth less than the SRS bandwidth supported by the terminal device, and the SRS bandwidth supported by the terminal device can be the total bandwidth. The number of RBs occupied by the first SRS bandwidth can be uniformly distributed in the total bandwidth supported by the terminal device. In this way, the SRS resource overhead can be reduced.

[0142] It should be noted that in the embodiments of the present application, the first information can explicitly indicate the first number of receive antennas and / or the first number of transmit antennas, or can implicitly indicate the first number of receive antennas and / or the first number of transmit antennas.

[0143] In some embodiments, the network device can directly indicate the first number of receive antennas and / or the first number of transmit antennas through the first information. The first information can be included in RRC signaling, MAC CE signaling or DCI signaling, which is not limited in the embodiments of the present application. In the first information, the number of the first number of receive antennas and / or the first number of transmit antennas can be directly carried.

[0144] In some embodiments, the network device can implicitly indicate the first number of receive antennas and / or the first number of transmit antennas through the first information.

[0145] In a possible implementation, for scenario 1, the first information can be used to indicate one or more SRS resource sets, each of the one or more SRS resource sets includes one or more SRS resources, and the one or more SRS resources are used to send the SRS; and the one or more SRS resource sets are associated with an antenna switching configuration; and the antenna switching configuration is used to configure the first receiving antenna number.

[0146] It can be understood that the first information can be SRS resource configuration information or information used to configure SRS resources. The first information can indicate or configure one or more SRS resource sets. The one or more SRS resource sets can be configured as antenna switching.

[0147] In the embodiment of the application, the one or more SRS resource sets configured by the first information can be associated with an antenna switching configuration, or the first information used to configure the one or more SRS resource sets can be associated with an antenna switching configuration.

[0148] For example, the first information can carry an ID of an antenna switching configuration, so as to indicate that the one or more SRS resource sets indicated by the first information are associated with the antenna switching configuration corresponding to the ID.

[0149] It should be noted that the antenna switching configuration can indicate the first receiving antenna number and / or the first receiving antenna number. That is, the network device can implicitly indicate the first receiving antenna number and / or the first receiving antenna number for antenna switching when configuring the SRS resources.

[0150] In another possible implementation, for scenarios 1 and 2, the first information is used to indicate one or more SRS resource sets, each of the one or more SRS resource sets includes one or more SRS resources, and the one or more SRS resources are used to send the SRS; and the first information is also used to indicate an antenna port number corresponding to each SRS resource in the one or more SRS resource sets, and a total number of antenna ports corresponding to the one or more SRS resource sets is the first receiving antenna number and / or the first transmitting antenna number.

[0151] It can be understood that the first information can be SRS resource configuration information or information used to configure SRS resources. The first information can indicate or configure one or more SRS resource sets.

[0152] In this implementation, the one or more SRS resource sets indicated or configured by the first information can be configured as antenna switching or beam management.

[0153] It should be noted that if the use of one or more SRS resource sets is configured as beam management, at least one of the transmission beams or the reception beams of at least two SRS resources in each SRS resource set is different. If the use of one or more SRS resource sets is configured as antenna switching, the transmission antennas of at least two SRS resources in each SRS resource set are different.

[0154] The first information can indicate the number of antenna ports corresponding to each SRS resource in each SRS resource set. Exemplarily, the first information can indicate that the SRS resources in one SRS resource set are single-port SRS resources or double-port SRS resources.

[0155] It should be noted that one SRS resource being a single-port SRS resource means that the terminal device transmits SRS on one antenna port each time, and one SRS resource being a double-port resource means that the terminal device can transmit SRS on two antenna ports at the same time each time.

[0156] In the embodiments of the present application, the total number of ports corresponding to all SRS resources in one or more SRS resource sets indicated or configured by the first information can be the first number of receiving antennas and / or the first number of transmitting antennas.

[0157] That is, the first information can implicitly indicate the first number of transmitting antennas and / or the first number of receiving antennas through the total number of ports of the configured SRS resources.

[0158] In some embodiments, before S410, the signal transmission method provided by the embodiments of the present application can further include the following steps:

[0159] S401, the terminal device sends capability information to the network device, and correspondingly, the network device receives the capability information sent by the terminal device.

[0160] The capability information includes one or more of the following:

[0161] The number of receiving antennas supported by the terminal device;

[0162] The number of transmitting antennas supported by the terminal device;

[0163] The sparse basis supported by the terminal device;

[0164] The measurement matrix supported by the terminal device.

[0165] It can be understood that the terminal device can report a set of supported numbers of transmitting antennas and / or numbers of receiving antennas to the network device. So that the network device indicates the first number of receiving antennas and / or the first number of transmitting antennas for the terminal device based on the capability information.

[0166] In some embodiments, the terminal device can report an antenna transceiving capability xTyR of the terminal device to the network device.

[0167] wherein x represents a number of transmit antennas supported by the terminal device, and x is a positive integer greater than or equal to 1. For example, x can be 1, 2, 3, 4, 6, 8, etc., which is not limited in the embodiments of the present application. In addition, y represents a number of receive antennas supported by the terminal device, and y can be 2n, wherein n is a positive integer greater than or equal to 1. For example, n can be a positive integer greater than or equal to 4 or 6, which is not limited in the embodiments of the present application.

[0168] In some embodiments, different antenna transceiving capabilities (i.e., different values of x and / or y) can be mapped to different parameters. The terminal device can carry a certain parameter in the capability information to indicate the antenna transceiving capability of the terminal device to the network device, where the antenna transceiving capability is the number of transmit antennas and / or the number of receive antennas supported by the terminal device.

[0169] In an example, referring to a terminal device capability (UE capability) message element (information element, IE) shown in Table 1, different antenna transceiving capabilities can be defined in the parameter srs-TxSwitch of the UE capability IE, such as 1r2, t1r4, t2r4, t1r4-t2r4, t1r1, t2r2, t4r4, xTyR, etc. in the field supportedSRS-TxPortSwitcht.

[0170] Table 1 UE capability IE

[0171] In another example, referring to another UE capability IE shown in Table 2, a new field supportedSRS-TxPortSwitch-v18 can be added to the existing UE capability IE to define new antenna transceiving capabilities, such as xTyR.

[0172] In the embodiments of the present application, the terminal device can also report the capability of the compressive sensing algorithm. For example, the terminal device supports a sparse basis and / or a measurement matrix, so that the network device can restore all channel state information according to the sparse basis and / or the measurement matrix supported by the terminal device.

[0173] In some embodiments, before S410, the signal transmission method provided in the embodiments of the present application can further include the following steps:

[0174] S402, the terminal device sends second information to the network device, and correspondingly, the network device receives the second information sent by the terminal device; the second information is used for the network device to determine the first receiving antenna number and / or the first transmitting antenna number.

[0175] It should be noted that the second information can be understood as auxiliary information, which is used to assist the terminal device to determine the first receiving antenna number and / or the first transmitting antenna number.

[0176] It should be noted that S402 can be performed before S401, after S401, or simultaneously with S401, and the embodiments of the present application do not limit this.

[0177] It should be further noted that the capability information in S401 and the second information in S402 can be reported in the same or different channels, or carried by the same or different signaling. Alternatively, the capability information and the second information can be sent in the same time slot or in different time slots. The embodiments of the present application do not limit the sending mode of the capability information and the second information.

[0178] In some embodiments, the second information can include one or more of the following:

[0179] The first receiving antenna number;

[0180] The first transmitting antenna number;

[0181] Index information of the first transmitting antenna port;

[0182] Index information of the first receiving antenna port;

[0183] A sparse basis and / or a measurement matrix matched with the antenna structure of the terminal device; the sparse basis and / or the measurement matrix matched with the antenna structure of the terminal device are used for the network device to recover the full channel state information based on the partial channel state information of the terminal device.

[0184] It can be understood that the terminal device can determine the first receiving antenna number and / or the first transmitting antenna number by itself. Further, the terminal device can report the first receiving antenna number and / or the first transmitting antenna number determined by itself to the network device. That is, the terminal device can recommend the first receiving antenna number and / or the first transmitting antenna number to the network device.

[0185] In a possible implementation, the terminal device compares the recovered full channel state information with the measured full channel state information, the recovered full channel state information is recovered based on the partial channel state information acquired by the terminal device based on the second receiving antenna number; the second receiving antenna number is less than the receiving antenna number supported by the terminal device;

[0186] If the comparison result between the recovered overall channel state information and the measured overall channel state information satisfies the first condition, the terminal device determines the second receive antenna number as the first receive antenna number.

[0187] It can be understood that the second receive antenna number can include multiple. The terminal device can select a suitable one from multiple second receive antenna numbers as the first receive antenna number. Here, the multiple second receive antenna numbers are all less than the receive antenna number supported by the terminal device.

[0188] Embodiments of the present application mark the second receive antenna number as M (different second receive antenna numbers are marked by M1, M2, M3, …, etc.). The terminal device can receive the downlink reference signal (for example, SSB or CSI-RS) based on M1 to obtain partial channel state information. Further, the terminal device can recover the overall channel state information (marked as recovered overall channel state information h') based on the partial channel state information.

[0189] It should be noted that the terminal device can recover the overall channel state information based on an AI algorithm or a compressed sensing algorithm. The way in which the terminal device recovers the overall channel state information can refer to the description in the above embodiments, and for the sake of brevity, will not be described here.

[0190] At the same time, the terminal device can also receive the downlink reference signal on all the receive antennas it supports to obtain the overall channel state information (marked as measured overall channel state information h).

[0191] Further, the terminal device can compare h and h' to judge whether the comparison result between the two satisfies the first condition. The first condition can be that h and h' are the same, or the similarity (for example, cosine similarity) of h and h' is greater than a certain threshold. If the comparison result between the two satisfies the first condition, it is considered that h' obtained based on M1 is better, and at this time, M1 can be reported to the network device.

[0192] If the comparison result between the two does not satisfy the first condition, the terminal device can receive the downlink reference signal based on M2 to obtain partial channel state information, so as to judge whether the comparison result between the overall channel state information h measured based on M2 and the corresponding partial channel state information h' satisfies the first condition. If the comparison result between the two satisfies the first condition, the terminal device can report M2 to the network device. Otherwise, the terminal device continues to receive the downlink reference signal based on M3 until a suitable M value is found.

[0193] In another possible implementation, the terminal device compares all the recovered channel state information with all the measured channel state information, wherein the all the recovered channel state information is recovered by the terminal device based on part of the channel state information acquired by the terminal device based on the second number of transmit antennas, and the second number of transmit antennas is less than the number of transmit antennas supported by the terminal device.

[0194] If the comparison result between the all the recovered channel state information and the all the measured channel state information satisfies a second condition, the second number of transmit antennas is determined as the first number of transmit antennas.

[0195] It can be understood that the second number of transmit antennas includes multiple. The terminal device can select a suitable one from the multiple second numbers of transmit antennas as the first number of transmit antennas. The multiple second numbers of transmit antennas are all less than the number of transmit antennas supported by the terminal device.

[0196] It should be noted that the manner in which the terminal device selects a suitable one from the multiple second numbers of transmit antennas as the first number of transmit antennas is the same as the manner in which the terminal device selects a suitable one from the multiple second numbers of receive antennas as the first number of receive antennas in the above embodiment, and details are not described herein for brevity.

[0197] It should be noted that the second condition can be that h and h' are the same, or the similarity between h and h' is greater than a certain threshold. The second condition can be the same as or different from the first condition, and the embodiments of the present application do not limit this.

[0198] In the embodiments of the present application, when the terminal device reports the first number of receive antennas and / or the first number of transmit antennas in the second information, the network device can use the first number of receive antennas and / or the first number of transmit antennas recommended by the terminal device to perform SRS transmission with the terminal device. In addition, the network device can also indicate other first number of receive antennas and / or first number of transmit antennas different from the first number of receive antennas and / or the first number of transmit antennas reported by the terminal device according to actual resource occupation.

[0199] That is, the first number of receive antennas and / or the first number of transmit antennas indicated by the network device through the first information can be the same as or different from the first number of receive antennas and / or the first number of transmit antennas reported by the terminal device through the second information, and the embodiments of the present application do not limit this.

[0200] In some embodiments, the network device can also determine and indicate a suitable first receiving antenna number and / or a first transmitting antenna number for the terminal device. For example, if the terminal device does not report the first receiving antenna number and / or the first transmitting antenna number in the second information, the network device can calculate and determine a suitable first receiving antenna number and / or a first transmitting antenna number for the terminal device and indicate the same. For another example, the network device can re-determine a new first receiving antenna number and / or a first transmitting antenna number without using the first receiving antenna number and / or the first transmitting antenna number recommended by the terminal device in the second information.

[0201] In a possible implementation, the network device compares all the recovered channel state information with all the measured channel state information, wherein the all the recovered channel state information is recovered by the network device based on the partial channel state information obtained based on the second receiving antenna number, and the second receiving antenna number is less than the receiving antenna number supported by the terminal device.

[0202] If the comparison result between the all the recovered channel state information and the all the measured channel state information satisfies a first condition, it is determined that the second receiving antenna number is the first receiving antenna number.

[0203] It can be understood that the second receiving antenna number can include multiple. The network device can select a suitable one from the multiple second receiving antenna numbers as the first receiving antenna number for the terminal device and indicate the first receiving antenna number through the first information. Here, the multiple second receiving antenna numbers are all less than the receiving antenna number supported by the terminal device.

[0204] Embodiments of the present application take the second receiving antenna number as M (different second receiving antenna numbers are marked by M1, M2, M3, and the like).

[0205] It should be noted that the terminal device can send SRS on its supported receiving antennas in turn through antenna switching. In this way, the network device can measure the SRS sent by the terminal device based on M1 and obtain partial channel state information. Here, measuring the SRS sent by the terminal device based on M1 can be understood as measuring the SRS sent by M1 antennas.

[0206] Further, the network device can recover all the channel state information based on the partial channel state information (denoted as all the recovered channel state information h’). It should be noted that the network device can recover all the channel state information based on an AI algorithm or a compressed sensing algorithm. The way in which the network device recovers all the channel state information can refer to the description in the above embodiments, and for brevity, will not be described here.

[0207] Meanwhile, the network device can also measure the SRS sent by the terminal device on all the receiving antennas supported by the network device (the terminal device sends in an antenna switching manner), and obtain all the channel state information (denoted as measured all channel state information h).

[0208] Further, the network device can compare h and h' to determine whether a comparison result between the two satisfies a first condition. The first condition can be that h and h' are the same, or a similarity (for example, a cosine similarity) of h and h' is greater than a certain threshold. If the comparison result between the two satisfies the first condition, it is considered that h' obtained based on M1 is better, and the network device can indicate the M1 through the first information.

[0209] If the comparison result between the two does not satisfy the first condition, the network device determines whether M2 is a suitable number of receiving antennas through the same manner described above. If yes, the network device can indicate the M2 through the first information, otherwise, the network device continues to determine the next M3, until a suitable number of receiving antennas is found, and the network device indicates the number of receiving antennas to the terminal device through the first information.

[0210] In another possible implementation, the network device compares recovered all channel state information with measured all channel state information, where the recovered all channel state information is recovered by the network device based on partial channel state information obtained based on a second number of transmitting antennas; and the second number of transmitting antennas is less than a number of transmitting antennas supported by the terminal device.

[0211] If a comparison result between the recovered all channel state information and the measured all channel state information satisfies a second condition, it is determined that the second number of transmitting antennas is the first number of transmitting antennas.

[0212] It can be understood that the second number of transmitting antennas can include multiple. The network device can select a suitable one from multiple second numbers of transmitting antennas as the first number of transmitting antennas, and indicate the first number of transmitting antennas through the first information. The multiple second numbers of transmitting antennas are all less than the number of transmitting antennas supported by the terminal device.

[0213] It should be noted that the manner in which the network device selects a suitable one from multiple second numbers of transmitting antennas as the first number of transmitting antennas is the same as the manner in which the network device selects a suitable one from multiple second numbers of receiving antennas as the first number of receiving antennas in the above embodiment, and details are not described herein for brevity.

[0214] It should be further noted that the second condition can be that h and h' are the same, or a similarity of h and h' is greater than a certain threshold. The second condition can be the same as or different from the first condition, and embodiments of the present application do not limit this.

[0215] In some embodiments, the terminal device can further report, to the network device, a sparse basis and / or a measurement matrix matching the antenna structure of the terminal device via the second information, so that the network device can recover the full channel state information from the partial channel state information of the terminal device by using a compressive sensing algorithm.

[0216] It can be understood that in the above embodiments, if the terminal device does not report the first receiving antenna number and / or the first transmitting antenna number in the second information, the network device can also determine and indicate a suitable first receiving antenna number and / or a first transmitting antenna number for the terminal device according to the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device reported by the terminal device via the second information.

[0217] It should be noted that the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device can be related to one or more of the following:

[0218] The number of transmitting antennas supported by the terminal device;

[0219] The number of receiving antennas supported by the terminal device;

[0220] Receiving antenna port grouping information of the terminal device;

[0221] Transmitting antenna port grouping information of the terminal device;

[0222] The number of receiving antennas in the horizontal direction;

[0223] The number of receiving antennas in the vertical direction;

[0224] The number of transmitting antennas in the horizontal direction;

[0225] The number of transmitting antennas in the vertical direction;

[0226] The number of DFT over-samples in the horizontal direction;

[0227] The number of DFT over-samples in the vertical direction.

[0228] In a possible implementation, the terminal device can determine, according to the above information, a sparse basis and / or a measurement matrix matching the antenna structure of the terminal device, and report the sparse basis and / or the measurement matrix to the network device via the second information. In this way, the network device can recover the full channel state information from the partial channel state information based on the sparse basis and / or the measurement matrix.

[0229] In another possible implementation, the terminal device can directly report the information related to the sparse basis and / or the measurement matrix matched with the terminal device to the network device in the second information, so that the network device can determine the sparse basis and / or the measurement matrix matched with the antenna structure of the terminal device according to the information.

[0230] It should be noted that the multiple receive antennas supported by the terminal device can be arranged at different positions of the terminal device or different antenna panels, for example, the multiple receive antennas can be uniformly distributed on the upper side, lower side, left side and right side of the terminal device. Similarly, the multiple transmit antennas supported by the terminal device can be arranged at different positions of the terminal device. Based on this, the multiple receive antennas or multiple transmit antennas supported by the terminal device can be grouped to obtain transmit antenna port grouping information and receive antenna port grouping information.

[0231] It should be understood that part of the transmit / receive antenna ports in the transmit / receive antenna port group can be blocked, and thus the channel condition is poor and the transmit / receive antenna ports cannot be used for data transmission. Alternatively, part of the transmit / receive antenna ports in the transmit / receive antenna port group are in a non-working mode / energy saving mode and cannot be used for data transmission.

[0232] Based on this, the terminal device can determine available transmit antenna ports (denoted as first transmit antenna ports) and / or available receive antenna ports (denoted as first receive antenna ports), for example, transmit antenna ports and / or receive antenna ports that are not blocked or are in a working mode / energy saving mode. The terminal device can send SRS to the network device based on the first transmit antenna ports and / or the first receive antenna ports.

[0233] In some embodiments, the terminal device can report index information of the first transmit antenna ports and / or index information of the first receive antenna ports to the network device through the second information, to inform the network device of the available transmit antenna ports and / or receive antenna ports of the terminal device, so that the network device determines the first number of transmit antennas and / or the first number of receive antennas for the terminal device based on the index information of the first transmit antenna ports and / or the index information of the first receive antenna ports.

[0234] In some embodiments, the index information of the first transmit antenna ports can include any one of the following:

[0235] the index of part of the antenna ports in each transmit antenna port group of the multiple transmit antenna port groups of the terminal device;

[0236] an index of a part of the transmit antenna ports in a part of the plurality of transmit antenna port groups of the terminal device;

[0237] an index of a part of the transmit antenna ports in a part of the plurality of transmit antenna port groups of the terminal device.

[0238] In a possible implementation, the transmit antenna port indexes reported by the terminal device can cover all the transmit antenna port groups (or become transmit antenna port groups). That is, for each transmit antenna port group, the terminal device can report at least one transmit antenna port.

[0239] Exemplarily, when the number of transmit antennas is 16, the transmit antenna ports can be divided into 4 transmit antenna port groups (transmit antenna port groups 0-4), and the indexes of the transmit antenna ports reported by the terminal device are distributed in the 4 transmit antenna port groups. As shown in FIG. 6, the indexes corresponding to the 16 transmit antenna ports are 0-15, wherein the terminal device can report indexes 2, 6, 9, and 15 to the network device. In this way, the terminal device can send 4 single-port SRS resources on the indicated 4 transmit antenna ports, and the 4 SRS resources are respectively associated with the antenna ports 2, 6, 9, and 15 of the terminal device. After receiving the SRS, the network device obtains all the channel state information through a compressive sensing algorithm and a measurement matrix.

[0240] In an example, the terminal device can indicate the indexes of the transmit antenna ports in the form of a bitmap. In the example shown in FIG. 6, 16 bits corresponding to 16 transmit antenna ports can be used, and the terminal device can set the bits corresponding to the antenna ports 2, 6, 9, and 15 to 1 and set the other bits to 0. In this way, the terminal device indicates that the transmit antenna ports 2, 6, 9, and 15 are used to transmit SRS.

[0241] In another example, the terminal device can respectively indicate the transmit antenna port groups and the port indexes in the groups. In the example shown in FIG. 6, the terminal device can use 00 to represent the first transmit antenna port group, 01 to represent the second transmit antenna port group, 10 to represent the third transmit antenna port group, and 11 to represent the fourth transmit antenna port group. Another 2 bits can be used to indicate the antenna ports in each transmit antenna port group. For example, the third antenna port in the first transmit antenna port group can be represented by 0010, the third antenna port in the second transmit antenna port group can be represented by 0110, the second transmit antenna port in the third transmit antenna port group can be represented by 1001, and the fourth transmit antenna port in the fourth transmit antenna port group can be represented by 1111. In addition, the terminal device can also use the bitmap to indicate the groups, and each group is indicated by 2 bits.

[0242] In another possible implementation, the terminal device can only report the index of the transmit antenna port group. Referring to FIG. 7, the terminal device reports the index of the transmit antenna port group, for example, antenna group 0, and all the antenna ports corresponding to the group index are used for SRS antenna switching. The group is the current working antenna port, and the network device only needs to know the current working antenna port, thereby reducing the measurement overhead and reducing the SRS transmission overhead.

[0243] In yet another possible implementation, the terminal device can report the index of part of the transmit antenna ports in part of the transmit antenna port groups. For example, the terminal device only reports port 2 corresponding to antenna group 0 and port 2 in antenna group 1, and the network device only needs to recover the channel information of the reported part of the groups (group 0 and group 1) by using the compressive sensing algorithm and the measurement matrix, without recovering the channel information corresponding to all the groups, thereby reducing the SRS resource overhead.

[0244] In some embodiments, the first receive antenna port index information can include any one of the following:

[0245] the index of part of the antenna ports in each of the plurality of receive antenna port groups of the terminal device;

[0246] the index of part of the receive antenna port groups of the terminal device;

[0247] the index of part of the antenna ports in part of the receive antenna port groups of the terminal device.

[0248] It should be noted that the first receive antenna port index information has the same indication manner as the first transmit antenna port index information, and details are not described herein for brevity.

[0249] In an embodiment of the present application, the signal transmission method provided by the embodiment of the present application can further include the following steps:

[0250] The network device sends third information to the terminal device, and correspondingly, the terminal device receives the third information; the third information is used to indicate that the network device supports recovering the full channel state information based on part of the channel state information.

[0251] It should be noted that the network device can send the third information before sending the first information, or can send the third information at the same time as the first information, for example, the first information and the third information can be carried in the same signaling or configuration field and sent at the same time. The third information can also be sent after the first information, and the embodiment of the present application does not limit this.

[0252] It should be noted that the third information and the second information can be associated. After receiving the third information, the terminal device can send the second information to the network device to support the recovery of all channel information through the compressed sensing algorithm.

[0253] The signal transmission method provided by the embodiments of the present application will be described in detail below in combination with specific application scenarios.

[0254] Embodiment one

[0255] It should be noted that embodiment one is applied to the SRS antenna switching scenario. Referring to FIG. 8A, the signal transmission method provided by the embodiments of the present application includes the following steps:

[0256] S1, the terminal device reports capability information.

[0257] In this embodiment, the capability information can be SRS antenna switching capability, specifically including the number of transmit antennas and the number of receive antennas supported by the terminal device.

[0258] In some embodiments, the terminal device can indicate that the SRS antenna switching capability it supports is xTyR.

[0259] Wherein, x represents the number of transmit antennas supported by the terminal device, x is a positive integer greater than or equal to 1. For example, the value of x can be 1, 2, 3, 4, 6, 8, etc., which is not limited by the embodiments of the present application. In addition, y represents the number of receive antennas supported by the terminal device, the value of y can be 2n, n is a positive integer greater than or equal to 1. For example, n can be a positive integer greater than or equal to 4 or 6, which is not limited by the embodiments of the present application.

[0260] In some embodiments, different antenna transceiving capabilities (i.e. different values of x and / or y) can be mapped to different parameters. The terminal device can carry a certain parameter in the capability information to indicate to the network device that the terminal device has the antenna transceiving capability, that is, the number of transmit antennas and / or the number of receive antennas supported by the terminal device.

[0261] Exemplarily, the terminal device can report that the antenna transceiving capability is 1T32R.

[0262] S2, the network device sends SRS antenna switching configuration information (i.e. the first information in the above embodiment) to the terminal device.

[0263] Wherein, the SRS antenna switching configuration information includes one or more of the following: the number of transmit antennas and the first number of receive antennas, the SRS resource set, the SRS resource, the number of ports corresponding to each SRS resource, the number of transmission layers information, etc. The first number of receive antennas is less than the number of receive antennas supported by the terminal device.

[0264] Exemplarily, the antenna switching configuration information can configure the first receiving antenna number as 8, and the SRS resource configuration related to the antenna transceiving capability 1T8R.

[0265] For the network device, the network device receives the multiple SRSs sent by the terminal device, the total port number of the multiple SRS resources is the same as the first receiving antenna number, and is less than the receiving antenna number supported by the terminal device.

[0266] It should be noted that the network device obtains the uplink partial channel quality by measurement through the received SRS, and obtains the uplink full channel quality by recovery through the compressive sensing technology and the measurement matrix, and obtains the downlink full channel quality through the channel reciprocity between the uplink and the downlink. In this way, the resource overhead of the SRS can be reduced, the time delay of the SRS antenna switching can be reduced, and the system capacity can be improved.

[0267] S3, the network device sends second auxiliary information (i.e., the third information in the above embodiment) to the terminal device, the second auxiliary information indicating that the network device supports the compressive sensing algorithm.

[0268] It should be noted that the step S3 can be executed at any position of the signal transmission method. For example, S3 can be executed before S1, or can be executed after S1 or S2, and the embodiments of the present application do not limit this.

[0269] S4, the terminal device sends first auxiliary information (i.e., the second information in the above embodiment) to the network device, for assisting the network device to recover the channel information.

[0270] In some embodiments, the second auxiliary information and the first auxiliary information can be associated, and after the terminal device receives the second auxiliary information, the terminal device can send the first auxiliary information to the network device to support the recovery of the full channel information through the compressive sensing algorithm.

[0271] In some embodiments, the first auxiliary information includes one or more combinations of the following:

[0272] The first receiving antenna number;

[0273] The sparse basis and / or the measurement matrix matched with the antenna structure of the terminal device;

[0274] The index information of the receiving antenna port.

[0275] In some embodiments, the terminal device can report the recommended first receiving antenna number to the network device, that is, the value of the first receiving antenna number can be reported by the terminal device to the network device.

[0276] In the method, the terminal device evaluates different receiving antenna numbers M and selects a proper M value. For example, for different receiving antenna numbers M1, M2, M3, and M4, the terminal device can compare the recovered overall channel state information h' with the actually measured overall channel state information h, find the most proper M value, and feed back the M value to the network device. The network device can configure the port number of the SRS reference signal according to the M value.

[0277] In some embodiments, the sparse basis and / or the measurement matrix are associated with one or more of the following information:

[0278] The total antenna port number of the terminal device;

[0279] The receiving antenna port grouping of the terminal device;

[0280] The horizontal receiving antenna number N1;

[0281] The vertical receiving antenna number N2;

[0282] The horizontal DFT oversampling number O1;

[0283] The vertical DFT oversampling number O2.

[0284] It should be noted that the receiving antenna port grouping of the terminal device can be related to the panel number of the receiving antenna.

[0285] In some embodiments, the index information of the receiving antenna port can include any of the following:

[0286] The index of the partial antenna port in each of the multiple transmitting antenna port groupings of the terminal device;

[0287] The index of the partial transmitting antenna port grouping in the multiple transmitting antenna port groupings of the terminal device;

[0288] The index of the partial antenna port in the partial transmitting antenna port grouping in the multiple transmitting antenna port groupings of the terminal device.

[0289] S5, the network device recovers the overall channel state information according to the received SRS and the first auxiliary information.

[0290] The network device measures the uplink partial channel state information through the received SRS, recovers the uplink overall channel state information through the compression sensing technology and the measurement matrix, and obtains the downlink overall channel state information through the reciprocity between the uplink and the downlink. In this way, the resource overhead of the SRS can be reduced, the time delay of the SRS antenna switching can be reduced, and the system capacity can be improved.

[0291] S6, the network device performs scheduling and resource allocation according to the total channel state information.

[0292] Embodiment Two

[0293] It should be noted that the embodiment one is applied to the SRS beam management scenario. Referring to FIG. 8B, the signal transmission method provided by the embodiment of the present application includes the following steps:

[0294] S1, the terminal device reports capability information.

[0295] In this embodiment, the capability information can be the number of transmit antennas supported by the terminal device. For example, the terminal device can support multiple transmit antennas (or SRS ports), for example, 16 ports, 32 ports.

[0296] S2, the network device sends SRS resource configuration information to the terminal device, and the terminal device sends SRS according to the SRS resource configuration information.

[0297] The SRS resource configuration information can indicate the first number of transmit antennas (or the first number of SRS ports) and / or the first SRS bandwidth. The first number of transmit antennas is less than the number of transmit antennas supported by the terminal device, and the first SRS bandwidth is less than the SRS bandwidth or the total bandwidth supported by the terminal device.

[0298] Specifically, the SRS resource configuration information can include one or more SRS resource sets, each SRS resource set includes one or more SRS resources, and the port number corresponding to each SRS resource. The total number of ports corresponding to each SRS resource in the one or more SRS resource sets is the first number of transmit antennas.

[0299] S3, the network device sends second auxiliary information (i.e. the third information in the above embodiment) to the terminal device, and the second auxiliary information indicates that the network device supports the compressed sensing algorithm.

[0300] It should be noted that step S3 can be executed at any position of the signal transmission method. For example, S3 can be executed before S1, or after S1 or S2, and the embodiment of the present application does not limit this.

[0301] S4, the terminal device sends first auxiliary information (i.e. the second information in the above embodiment) to the network device, for assisting the network device to recover the channel information.

[0302] In some embodiments, the second auxiliary information can be associated with the first auxiliary information, and after receiving the second auxiliary information, the terminal device can send the first auxiliary information to the network device to support the recovery of the total channel information through the compressed sensing algorithm

[0303] In some embodiments, the first auxiliary information comprises one or more of the following in combination:

[0304] a number of first transmit antennas;

[0305] a sparse basis and / or a measurement matrix matching the antenna structure of the terminal device;

[0306] index information of the transmit antenna ports.

[0307] It should be noted that the relevant content of the first auxiliary information can refer to the description of Embodiment One above, except that Embodiment One is related to the receive antennas and Embodiment Two is related to the transmit antennas. For brevity, the description is not repeated here.

[0308] S5, the network device restores the channel state information corresponding to all the beams according to the received SRS and the first auxiliary information.

[0309] S6, the network device selects the optimal beam according to all the channel state information and performs beam indication.

[0310] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above-described embodiments. Within the technical concept scope of the present application, the technical solutions of the present application can be subjected to various simple modifications, and these simple modifications all belong to the protection scope of the present application. For example, in the above-described specific embodiments, various specific technical features described in the embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application does not further describe various possible combination manners. For another example, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the present application, it should also be considered as disclosed content of the present application. For another example, under the premise of no conflict, each embodiment described in the present application and / or technical features in each embodiment can be combined with any prior art, and the technical solutions obtained after combination should also fall within the protection scope of the present application.

[0311] It should also be understood that the size of the sequence number of the above processes does not mean the order of execution in various method embodiments of the present application, and the execution order of the processes should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink", "uplink" and "sidelink" are used to represent the transmission direction of signals or data, wherein "downlink" is used to represent the first direction of the transmission direction of signals or data from the station to the user equipment of the cell, "uplink" is used to represent the second direction of the transmission direction of signals or data from the user equipment of the cell to the station, and "sidelink" is used to represent the third direction of the transmission direction of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" represents that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is only used to describe the association relationship of the associated objects, and indicates that there can be three relationships. Specifically, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0312] FIG. 9 is a structural composition schematic diagram of a signal transmission device 900 provided by the embodiments of the present application, which is applied to a terminal device. As shown in FIG. 9, the signal transmission device 900 comprises:

[0313] A first receiving unit 910 is configured to receive first information, wherein the first information is used to determine a first receiving antenna number and / or a first transmitting antenna number; the first receiving antenna number is less than a receiving antenna number supported by the terminal device, and the first transmitting antenna number is less than a transmitting antenna number supported by the terminal device.

[0314] A first sending unit 920 is configured to send a sounding reference signal (SRS); a port number of the SRS sent by the terminal device matches the first receiving antenna number and / or the first transmitting antenna number.

[0315] In some embodiments, the first information is used to indicate one or more SRS resource sets; each SRS resource set in the one or more SRS resource sets comprises one or more SRS resources, and the one or more SRS resources are used to send the SRS.

[0316] The one or more SRS resource sets are associated with an antenna switching configuration; and the antenna switching configuration is used to configure to indicate the first receiving antenna number and / or the first transmitting antenna number.

[0317] In some embodiments, the first information is used to indicate one or more SRS resource sets, each of the one or more SRS resource sets including one or more SRS resources, the one or more SRS resources being used to transmit the SRS;

[0318] The first information is also used to indicate a number of antenna ports corresponding to each SRS resource in the one or more SRS resource sets, a total number of antenna ports corresponding to the one or more SRS resource sets being the first number of receive antennas and / or the first number of transmit antennas.

[0319] In some embodiments, the first number of receive antennas and / or the first number of transmit antennas are used for antenna switching.

[0320] Alternatively, the first number of transmit antennas is used for beam management.

[0321] In some embodiments, the first information further includes a first SRS bandwidth; the first SRS bandwidth is less than an SRS bandwidth supported by the terminal device.

[0322] In some embodiments, the first sending unit 820 is further configured to send capability information, the capability information including one or more of the following:

[0323] a number of receive antennas supported by the terminal device;

[0324] a number of transmit antennas supported by the terminal device;

[0325] a sparse basis supported by the terminal device;

[0326] a measurement matrix supported by the terminal device.

[0327] In some embodiments, the first sending unit 820 is further configured to send second information to a network device; the second information being used by the network device to determine the first number of receive antennas and / or the first number of transmit antennas.

[0328] In some embodiments, the second information includes one or more of the following:

[0329] the first number of receive antennas;

[0330] the first number of transmit antennas;

[0331] index information of a first transmit antenna port;

[0332] index information of a first receive antenna port;

[0333] a sparse basis and / or a measurement matrix matching an antenna structure of the terminal device; the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device is used for the network device to recover full channel state information based on partial channel state information of the terminal device.

[0334] In some embodiments, the signal transmission method further comprises a comparing unit configured to compare the recovered full channel state information with the measured full channel state information, the recovered full channel state information being recovered by the terminal device based on partial channel state information obtained by a second number of receive antennas; the second number of receive antennas being less than a number of receive antennas supported by the terminal device; and if a comparison result between the recovered full channel state information and the measured full channel state information satisfies a first condition, determining that the second number of receive antennas is the first number of receive antennas.

[0335] In some embodiments, the comparing unit is further configured to compare the recovered full channel state information with the measured full channel state information, the recovered full channel state information being recovered by the terminal device based on partial channel state information obtained by a second number of transmit antennas; the second number of transmit antennas being less than a number of transmit antennas supported by the terminal device.

[0336] If a comparison result between the recovered full channel state information and the measured full channel state information satisfies a second condition, determining that the second number of transmit antennas is the first number of transmit antennas.

[0337] In some embodiments, the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device is related to one or more of the following:

[0338] a number of transmit antennas supported by the terminal device;

[0339] a number of receive antennas supported by the terminal device;

[0340] receive antenna port grouping information of the terminal device;

[0341] transmit antenna port grouping information of the terminal device;

[0342] a number of receive antennas in a horizontal direction;

[0343] a number of receive antennas in a vertical direction;

[0344] a number of transmit antennas in a horizontal direction;

[0345] a number of transmit antennas in a vertical direction;

[0346] a number of DFT oversampling in a horizontal direction;

[0347] a number of DFT oversampling in a vertical direction.

[0348] In some embodiments, the index information of the first transmit antenna port includes any one of the following:

[0349] an index of a part of antenna ports in each of a plurality of transmit antenna port groups of the terminal device;

[0350] an index of a part of transmit antenna port groups of the terminal device;

[0351] an index of a part of antenna ports in a part of transmit antenna port groups of the terminal device.

[0352] In some embodiments, the first receive antenna port index information includes any one of the following:

[0353] an index of a part of antenna ports in each of a plurality of receive antenna port groups of the terminal device;

[0354] an index of a part of receive antenna port groups of the terminal device;

[0355] an index of a part of antenna ports in a part of receive antenna port groups of the terminal device.

[0356] In some embodiments, the first receiving unit 910 is further configured to receive third information; the third information is used to indicate that the network device supports recovering all channel state information based on partial channel state information.

[0357] FIG. 10 is a structural component diagram of a signal transmission device 100 provided by an embodiment of the present application, which is applied to a network device. As shown in FIG. 10, the signal transmission device 100 includes:

[0358] a second sending unit 1010 configured to send first information to a terminal device; the first information is used by the terminal device to determine a first receive antenna number and / or a first transmit antenna number; the first receive antenna number is less than a receive antenna number supported by the terminal device, and the first transmit antenna number is less than a transmit antenna number supported by the terminal device;

[0359] a second receiving unit 1020 configured to receive a sounding SRS sent by the terminal device; a port number of the SRS sent by the terminal device matches the first receive antenna number and / or the first transmit antenna number.

[0360] In some embodiments, the signal transmission apparatus 100 further comprises a determining unit configured to determine partial channel state information of the terminal device based on the measurement result of the SRS; and recover full channel state information of the terminal device based on the partial channel state information.

[0361] In some embodiments, the first information is used to indicate one or more SRS resource sets, each of the one or more SRS resource sets comprising one or more SRS resources, the one or more SRS resources being used to receive the SRS.

[0362] The one or more SRS resource sets are associated with an antenna switching configuration; and the antenna switching configuration is used to configure the first number of receiving antennas and / or the first number of transmitting antennas.

[0363] In some embodiments, the first information is used to indicate one or more SRS resource sets, each of the one or more SRS resource sets comprising one or more SRS resources; and the one or more SRS resources are used to receive the SRS.

[0364] The first information is further used to indicate a number of antenna ports corresponding to each of the one or more SRS resource sets; and a total number of antenna ports corresponding to the one or more SRS resource sets is the first number of receiving antennas and / or the first number of transmitting antennas.

[0365] In some embodiments, the first number of receiving antennas and / or the first number of transmitting antennas are used for antenna switching; or the first number of transmitting antennas are used for beam management.

[0366] In some embodiments, the first information further comprises a first SRS bandwidth; and the first SRS bandwidth is smaller than an SRS bandwidth supported by the terminal device.

[0367] In some embodiments, the second receiving unit 1020 is further configured to receive capability information sent by the terminal device, the capability information comprising one or more of the following:

[0368] a number of receiving antennas supported by the terminal device;

[0369] a number of transmitting antennas supported by the terminal device;

[0370] a sparse basis supported by the terminal device;

[0371] a measurement matrix supported by the terminal device.

[0372] In some embodiments, the second receiving unit 1020 is further configured to receive second information sent by the terminal device; the second information is used by the network device to determine the first receiving antenna number and / or the first transmitting antenna number.

[0373] In some embodiments, the second information comprises one or more of the following:

[0374] the first receiving antenna number;

[0375] the first transmitting antenna number;

[0376] index information of a first transmitting antenna port;

[0377] index information of a first receiving antenna port;

[0378] a sparse basis and / or a measurement matrix matching the antenna structure of the terminal device; the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device is used by the network device to recover full channel state information based on partial channel state information of the terminal device.

[0379] In some embodiments, the determining unit is further configured to compare the recovered full channel state information with measured full channel state information, the recovered full channel state information being recovered by the network device based on partial channel state information acquired by a second receiving antenna number; the second receiving antenna number is smaller than a receiving antenna number supported by the terminal device.

[0380] If a comparison result between the recovered full channel state information and the measured full channel state information satisfies a first condition, it is determined that the second receiving antenna number is the first receiving antenna number.

[0381] In some embodiments, the determining unit is further configured to compare the recovered full channel state information with measured full channel state information, the recovered full channel state information being recovered by the network device based on partial channel state information acquired by a second transmitting antenna number; the second transmitting antenna number is smaller than a transmitting antenna number supported by the terminal device.

[0382] If a comparison result between the recovered full channel state information and the measured full channel state information satisfies a second condition, it is determined that the second transmitting antenna number is the first transmitting antenna number.

[0383] In some embodiments, the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device is related to one or more of the following:

[0384] The number of transmit antennas supported by the terminal device;

[0385] The number of receive antennas supported by the terminal device;

[0386] The receive antenna port grouping information of the terminal device;

[0387] The transmit antenna port grouping information of the terminal device;

[0388] The number of receive antennas in the horizontal direction;

[0389] The number of receive antennas in the vertical direction;

[0390] The number of transmit antennas in the horizontal direction;

[0391] The number of transmit antennas in the vertical direction;

[0392] The number of DFT (Discrete Fourier Transform) oversamples in the horizontal direction;

[0393] The number of DFT oversamples in the vertical direction.

[0394] In some embodiments, the index information of the first transmit antenna port includes any one of the following:

[0395] The index of the partial antenna ports in each of the plurality of transmit antenna port groupings of the terminal device;

[0396] The index of the partial transmit antenna port groupings in the plurality of transmit antenna port groupings of the terminal device;

[0397] The index of the partial antenna ports in the partial transmit antenna port groupings in the plurality of transmit antenna port groupings of the terminal device.

[0398] In some embodiments, the first receive antenna port index information includes any one of the following:

[0399] The index of the partial antenna ports in each of the plurality of receive antenna port groupings of the terminal device;

[0400] The index of the partial receive antenna port groupings in the plurality of receive antenna port groupings of the terminal device;

[0401] The index of the partial antenna ports in the partial receive antenna port groupings in the plurality of receive antenna port groupings of the terminal device.

[0402] In some embodiments, the second sending unit 1010 is further configured to send third information to the terminal device; the third information is used to indicate that the network device supports recovering all channel state information based on partial channel state information.

[0403] Those skilled in the art should understand that the above description of the signal transmission apparatus of the embodiments of the present application can be understood with reference to the description of the signal transmission method of the embodiments of the present application.

[0404] FIG. 11 is a schematic structural diagram of a communication device 1100 provided by an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 1100 shown in FIG. 11 includes a processor 1110. The processor 1110 can invoke and run a computer program from a memory to implement the method in the embodiments of the present application.

[0405] Optionally, as shown in FIG. 11, the communication device 1100 can further include a memory 1120. The processor 1410 can invoke and run a computer program from the memory 1120 to implement the method in the embodiments of the present application.

[0406] The memory 1120 can be a separate device independent of the processor 1110, or can be integrated in the processor 1110.

[0407] Optionally, as shown in FIG. 11, the communication device 1100 can further include a transceiver 1130. The processor 1110 can control the transceiver 1130 to communicate with other devices. Specifically, the transceiver 1130 can send information or data to other devices, or receive information or data sent by other devices.

[0408] The transceiver 1430 can include a transmitter and a receiver. The transceiver 1430 can further include an antenna, and the number of antennas can be one or more.

[0409] Optionally, the communication device 1100 can be a terminal device / mobile terminal of the embodiments of the present application, and the communication device 1100 can implement the corresponding processes in the methods of the embodiments of the present application implemented by the terminal device / mobile terminal. For the sake of brevity, details are not described herein.

[0410] Optionally, the communication device 1100 can be a network device of the embodiments of the present application, and the communication device 1100 can implement the corresponding processes in the methods of the embodiments of the present application implemented by the network device. For the sake of brevity, details are not described herein.

[0411] FIG. 12 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 1200 shown in FIG. 12 includes a processor 1210. The processor 1210 can invoke and run a computer program from a memory to implement the method in the embodiments of the present application.

[0412] Optionally, as shown in FIG. 12, the chip 1200 can further include a memory 1220. The processor 1210 can call and run a computer program from the memory 1220 to implement the method in the embodiments of the present application.

[0413] The memory 1220 can be a separate device independent of the processor 1210, or can be integrated in the processor 1210.

[0414] Optionally, the chip 1200 can further include an input interface 1230. The processor 1210 can control the input interface 1230 to communicate with other devices or chips, and specifically, can acquire information or data sent by other devices or chips.

[0415] Optionally, the chip 1200 can further include an output interface 1240. The processor 1210 can control the output interface 1240 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

[0416] Optionally, the chip can be applied to the terminal device / mobile terminal in the embodiments of the present application, and the chip can implement the corresponding processes realized by the terminal device / mobile terminal in each method of the embodiments of the present application. For brevity, details are not described herein.

[0417] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes realized by the network device in each method of the embodiments of the present application. For brevity, details are not described herein.

[0418] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system-on-chip, a chip system or a system-on-chip, etc.

[0419] The embodiments of the present application further provide a computer storage medium storing one or more programs, which can be executed by one or more processors to implement the methods in the embodiments of the present application.

[0420] FIG. 13 is a schematic block diagram of a communication system 1300 provided by the embodiments of the present application. As shown in FIG. 13, the communication system 1300 includes a terminal device 1310 and a network device 1320.

[0421] The terminal device 1310 can be used to implement the corresponding functions realized by the terminal device in the above methods, and the network device 1320 can be used to implement the corresponding functions realized by the network device in the above methods. For brevity, details are not described herein.

[0422] It should be understood that the processor of the embodiments of the present application can be an integrated circuit chip with a processing capability of signals. In the implementation process, each step of the method embodiments described above can be completed by the integrated logic circuit of hardware in the processor or the instructions in the form of software. The processor described above can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0423] It is to be understood that the memory in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (Random Access Memory, RAM) used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the system and method described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0424] It should be understood that the above-mentioned memory is exemplary but not limiting, for example, the memory in the embodiments of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and the like. That is, the memory in the embodiments of the present application is intended to include, but not limited to, these and any other suitable types of memory.

[0425] The embodiment of the present application further provides a computer readable storage medium for storing the computer program.

[0426] Optionally, the computer readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0427] Optionally, the computer readable storage medium can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program makes the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0428] The embodiment of the present application further provides a computer program product comprising computer program instructions.

[0429] Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0430] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiment of the present application, and the computer program instructions make the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0431] The embodiment of the present application further provides a computer program.

[0432] Optionally, the computer program can be applied to the network device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the network device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0433] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiment of the present application, and when the computer program runs on the computer, makes the computer execute the corresponding process realized by the mobile terminal / terminal device in the various methods of the embodiment of the present application, which will not be repeated here for the sake of brevity.

[0434] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0435] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0436] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0437] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0438] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0439] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0440] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for signal transmission, the method comprising: receiving, by a terminal device, first information, the first information being used for determining a first number of receive antennas and / or a first number of transmit antennas; the first number of receive antennas being less than a number of receive antennas supported by the terminal device, the first number of transmit antennas being less than a number of transmit antennas supported by the terminal device; transmitting, by the terminal device, a sounding reference signal (SRS) ; and transmitting, by the terminal device, a number of ports of the SRS matching the first number of receive antennas and / or the first number of transmit antennas. 2.The method of claim 1, wherein: the first information is used for indicating one or more sets of SRS resources, each of the one or more sets of SRS resources comprising one or more SRS resources, the one or more SRS resources being used for transmitting the SRS; and the one or more sets of SRS resources are associated with an antenna switching configuration, the antenna switching configuration being used for configuring the first number of receive antennas and / or the first number of transmit antennas. 3.The method of claim 1, wherein: the first information is used for indicating one or more sets of SRS resources, each of the one or more sets of SRS resources comprising one or more SRS resources, the one or more SRS resources being used for transmitting the SRS; and the first information is further used for indicating a number of antenna ports corresponding to each of the one or more SRS resources, a total number of the antenna ports corresponding to the one or more sets of SRS resources being the first number of receive antennas and / or the first number of transmit antennas. 4.The method of any one of claims 1 to 3, wherein: the first number of receive antennas and / or the first number of transmit antennas are used for antenna switching; or the first number of transmit antennas are used for beam management. 5.The method of any one of claims 1 to 4, wherein: the first information further comprises a first SRS bandwidth, the first SRS bandwidth being less than a SRS bandwidth supported by the terminal device; and the method further comprises: transmitting, by the terminal device, capability information, the capability information comprising one or more of: a number of receive antennas supported by the terminal device; a number of transmit antennas supported by the terminal device; a sparse basis supported by the terminal device; and a measurement matrix supported by the terminal device; and the method further comprises: transmitting, by the terminal device, second information to a network device; and the second information being used for the network device to determine the first number of receive antennas and / or the first number of transmit antennas; and the second information comprising one or more of: the first number of receive antennas; the first number of transmit antennas; index information of a first number of transmit antenna ports; index information of a first number of receive antenna ports; a sparse basis and / or a measurement matrix matching an antenna structure of the terminal device, the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device being used for the network device to recover full channel state information based on partial channel state information of the terminal device. 6.The method of any one of claims 1 to 5, wherein: the first number of receive antennas and / or the first number of transmit antennas are determined based on a number of antenna ports supported by the terminal device. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 6. The method according to any one of claims 1 to 5, wherein, ​ ​ ​ ​ ​ ​ 7. The method according to any one of claims 1 to 6, wherein, ​ ​ ​ 8. The method of claim 7, wherein, ​ ​ ​ ​ ​ ​ 9. The method of claim 8, wherein, ​ The terminal device compares the recovered full channel state information with the measured full channel state information, wherein the recovered full channel state information is recovered by the terminal device based on the partial channel state information obtained by the terminal device according to the second receiving antenna number; The second receiving antenna number is less than the receiving antenna number supported by the terminal device; If the comparison result between the recovered full channel state information and the measured full channel state information meets the first condition, it is determined that the second receiving antenna number is the first receiving antenna number.

10. The method of claim 8 or 9, wherein, Further comprising: The terminal device compares the recovered full channel state information with the measured full channel state information, wherein The recovered full channel state information is recovered by the terminal device based on the partial channel state information obtained by the terminal device according to the second transmitting antenna number; The second transmitting antenna number is less than the transmitting antenna number supported by the terminal device; If the comparison result between the recovered full channel state information and the measured full channel state information meets the second condition, it is determined that the second transmitting antenna number is the first transmitting antenna number.

11. The method according to any one of claims 8 to 10, wherein, The sparse basis and / or the measurement matrix matched with the antenna structure of the terminal device are related to one or more of the following: The transmitting antenna number supported by the terminal device; The receiving antenna number supported by the terminal device; The receiving antenna port grouping information of the terminal device; The transmitting antenna port grouping information of the terminal device; The receiving antenna number in the horizontal direction; The receiving antenna number in the vertical direction; The transmitting antenna number in the horizontal direction; The transmitting antenna number in the vertical direction; The number of DFT over-sampling in the horizontal direction; The number of DFT over-sampling in the vertical direction.

12. The method according to any one of claims 8 to 11, wherein, The index information of the first transmitting antenna port includes any one of the following: The index of the partial antenna port in each transmitting antenna port grouping of the plurality of transmitting antenna port groupings of the terminal device; The index of the partial transmitting antenna port grouping in the plurality of transmitting antenna port groupings of the terminal device; The index of the partial antenna port in the partial transmitting antenna port grouping in the plurality of transmitting antenna port groupings of the terminal device.

13. The method according to any one of claims 8 to 12, wherein, The first receiving antenna port index information includes any one of the following: The index of the partial antenna port in each receiving antenna port grouping of the plurality of receiving antenna port groupings of the terminal device; The index of the partial receiving antenna port grouping in the plurality of receiving antenna port groupings of the terminal device; The index of the partial antenna port in the partial receiving antenna port grouping in the plurality of receiving antenna port groupings of the terminal device.

14. The method of any one of claims 1 to 13, wherein, Further comprising: The terminal device receives third information; The third information is used to indicate that the network device supports recovering full channel state information based on partial channel state information.

15. A signal transmission method, the method comprising: A network device sends first information to a terminal device; The first information is used for the terminal device to determine a first receiving antenna number and / or a first transmitting antenna number; The first receiving antenna number is less than a receiving antenna number supported by the terminal device, and the first transmitting antenna number is less than a transmitting antenna number supported by the terminal device; The network device receives a sounding reference signal (SRS) sent by the terminal device; A port number of the SRS sent by the terminal device matches the first receiving antenna number and / or the first transmitting antenna number.

16. The method of claim 15, wherein, Further comprising: The network device determines partial channel state information of the terminal device based on a measurement result of the SRS; The network device recovers all channel state information of the terminal device based on the partial channel state information.

17. The method of claim 15 or 16, wherein The first information is used to indicate one or more SRS resource sets, each of the one or more SRS resource sets includes one or more SRS resources, and the one or more SRS resources are used to receive the SRS; The one or more SRS resource sets are associated with an antenna switching configuration, and the antenna switching configuration is used to configure the first receiving antenna number and / or the first transmitting antenna number.

18. The method of claim 15 or 16, wherein The first information is used to indicate one or more SRS resource sets, each of the one or more SRS resource sets includes one or more SRS resources, and the one or more SRS resources are used to receive the SRS; The first information is further used to indicate an antenna port number corresponding to each SRS resource in the one or more SRS resource sets, and a total number of the antenna ports corresponding to the one or more SRS resource sets is the first receiving antenna number and / or the first transmitting antenna number.

19. The method of any one of claims 15 to 18, wherein The first receiving antenna number and / or the first transmitting antenna number are used for antenna switching; or The first transmitting antenna number is used for beam management.

20. The method of any one of claims 15 to 19, wherein The first information further includes a first SRS bandwidth, and the first SRS bandwidth is less than an SRS bandwidth supported by the terminal device.

21. The method of any one of claims 15 to 20, wherein, Further comprising: The network device receives capability information sent by the terminal device, and the capability information includes one or more of the following: A receiving antenna number supported by the terminal device; A transmitting antenna number supported by the terminal device; A sparse basis supported by the terminal device; A measurement matrix supported by the terminal device.

22. The method of any one of claims 15 to 21, wherein, Further comprising: The network device receives second information sent by the terminal device; The second information is used by the network device to determine the first receiving antenna number and / or the first transmitting antenna number.

23. The method of claim 22, wherein, The second information includes one or more of the following: The first receiving antenna number; The first transmitting antenna number; Index information of a first transmitting antenna port; Index information of a first receiving antenna port; a sparse basis and / or a measurement matrix matching an antenna structure of the terminal device; the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device is used for the network device to recover full channel state information based on partial channel state information of the terminal device.

24. The method of any one of claims 15 to 23, wherein, Further comprising: the network device compares the recovered full channel state information with the measured full channel state information, the recovered full channel state information is recovered by the network device based on partial channel state information obtained by a second receiving antenna number; the second receiving antenna number is less than a receiving antenna number supported by the terminal device; if a comparison result between the recovered full channel state information and the measured full channel state information meets a first condition, it is determined that the second receiving antenna number is the first receiving antenna number.

25. The method of any one of claims 15 to 24, wherein, Further comprising: the network device compares the recovered full channel state information with the measured full channel state information, the recovered full channel state information is recovered by the network device based on partial channel state information obtained by a second transmitting antenna number; the second transmitting antenna number is less than a transmitting antenna number supported by the terminal device; if a comparison result between the recovered full channel state information and the measured full channel state information meets a second condition, it is determined that the second transmitting antenna number is the first transmitting antenna number.

26. The method of any one of claims 15 to 25, wherein, the sparse basis and / or the measurement matrix matching the antenna structure of the terminal device is related to one or more of the following: a transmitting antenna number supported by the terminal device; a receiving antenna number supported by the terminal device; receiving antenna port grouping information of the terminal device; transmitting antenna port grouping information of the terminal device; a receiving antenna number in a horizontal direction; a receiving antenna number in a vertical direction; a transmitting antenna number in a horizontal direction; a transmitting antenna number in a vertical direction; a number of DFT over-sampling in a horizontal direction; a number of DFT over-sampling in a vertical direction.

27. The method of any one of claims 15 to 26, wherein, the index information of the first transmitting antenna port includes any one of the following: indices of partial antenna ports in each of a plurality of transmitting antenna port groupings of the terminal device; indices of partial transmitting antenna port groupings of the plurality of transmitting antenna port groupings of the terminal device; indices of partial antenna ports in partial transmitting antenna port groupings of the plurality of transmitting antenna port groupings of the terminal device.

28. The method of any one of claims 15 to 27, wherein, the first receiving antenna port index information includes any one of the following: indices of partial antenna ports in each of a plurality of receiving antenna port groupings of the terminal device; indices of partial receiving antenna port groupings of the plurality of receiving antenna port groupings of the terminal device; indices of partial antenna ports in partial receiving antenna port groupings of the plurality of receiving antenna port groupings of the terminal device.

29. The method of any one of claims 15 to 28, wherein, Further comprising: the network device sends third information to the terminal device; the third information is used to indicate that the network device supports recovering full channel state information based on partial channel state information.

30. A signal transmission apparatus applied to a terminal device, comprising: a first receiving unit configured to receive first information, the first information being used to determine a first number of receiving antennas and / or a first number of transmitting antennas; the first number of receiving antennas being less than a number of receiving antennas supported by the terminal device, and the first number of transmitting antennas being less than a number of transmitting antennas supported by the terminal device; a first sending unit configured to send a sounding reference signal (SRS); a number of ports used by the terminal device to send the SRS matches the first number of receiving antennas and / or the first number of transmitting antennas.

31. A signal transmission apparatus applied to a network device, comprising: a second sending unit configured to send first information; the first information being used by the terminal device to determine a first number of receiving antennas and / or a first number of transmitting antennas; the first number of receiving antennas being less than a number of receiving antennas supported by the terminal device, and the first number of transmitting antennas being less than a number of transmitting antennas supported by the terminal device; a second receiving unit configured to receive a sounding reference signal (SRS) sent by the terminal device; a number of ports used by the terminal device to send the SRS matches the first number of receiving antennas and / or the first number of transmitting antennas.

32. A communication device, comprising: a memory, a processor and a transceiver, the transceiver being configured to implement communication with the network device; the memory storing a computer program capable of being run on the processor, the processor, in conjunction with the transceiver, implements the method of any one of claims 1-14 or 15-29 when the processor runs the computer program.

33. A computer storage medium storing one or more programs, the one or more programs being capable of being executed by one or more processors to implement the method of any one of claims 1-14 or 15-29.

34. A chip comprising: a processor configured to invoke and run a computer program from a memory, so that a device in which the chip is installed implements the method of any one of claims 1-14 or 15-29.

35. A computer program product comprising a computer storage medium storing a computer program, the computer program comprising instructions capable of being executed by at least one processor, and when the instructions are executed by the at least one processor, the method of any one of claims 1-14 or 15-29 is implemented.

36. A computer program configured to cause a computer to implement the method of any one of claims 1-14 or 15-29.

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