Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device receives configuration information sent by a network device, the configuration information being used for configuring a first SRS resource group and a second SRS resource group, the first SRS resource group comprising one or more 2-port SRS resources, and the second SRS resource group comprising one or more single-port SRS resources; the terminal device sends SRSs on the first SRS resource group and the second SRS resource group; and the terminal device receives indication information sent by the network device, the indication information comprising TPMI information, the TPMI information being used for determining a precoding mode on antenna ports corresponding to a first SRS resource and a second SRS resource, the first SRS resource group comprising the first SRS resource, and the second SRS resource group comprising the second SRS resource. In the present application, introduction of new 3-port SRS resources is not needed, and thus 3-port transmission can be achieved with low standardization complexity.

Description

Wireless communication method, terminal device, and network device Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal equipment, and network equipment. Background Art

[0002] The relevant technology supports codebook-based precoding processing for 2 antenna ports and 4 antenna ports. However, some terminal devices have 3 transmitting antennas. Since the relevant technology cannot support codebook-based precoding processing for 3 antenna ports, these terminal devices can only degenerate to 2-antenna port transmission, that is, using a 2-port codebook for uplink transmission. The gain of the 3 transmitting antennas cannot be fully utilized, resulting in affected spectrum efficiency. If uplink transmission of 3 antenna ports is to be supported, corresponding sounding reference signal (SRS) resources that support 3 antenna ports are required for uplink channel detection. However, the relevant standards only support SRS resources for 1, 2, 4 or 8 antenna ports. The additional introduction of SRS resources for 3 antenna ports requires significant standardization work, such as the need to solve the problem of how to determine the comb configuration, cyclic shift configuration, physical resources, sequence, etc. of the 3 SRS ports.

[0003] Summary of the Invention

[0004] The present application provides a wireless communication method, a terminal device, and a network device. The following introduces various aspects of the present application.

[0005] In a first aspect, an embodiment of the present application provides a wireless communication method, the method comprising: a terminal device receives configuration information sent by a network device, the configuration information being used to configure a first SRS resource group and a second SRS resource group, the first SRS resource group comprising one or more SRS resources of two antenna ports, and the second SRS resource group comprising one or more SRS resources of a single antenna port; the terminal device sends SRS on the first SRS resource group and the second SRS resource group; the terminal device receives indication information sent by the network device, the indication information comprising transmit precoding matrix indicator (TPMI) information, the TPMI information being used to determine a precoding method on antenna ports corresponding to the first SRS resource and the second SRS resource, the first SRS resource group comprising a first SRS resource, and the second SRS resource group comprising a second SRS resource.

[0006] In a second aspect, an embodiment of the present application provides a wireless communication method, the method comprising: a network device sends configuration information to a terminal device, the configuration information being used to configure a first SRS resource group and a second SRS resource group, the first SRS resource group comprising one or more SRS resources of two antenna ports, and the second SRS resource group comprising one or more SRS resources of a single antenna port; the network device receives the SRS sent by the terminal device on the first SRS resource group and the second SRS resource group; the network device sends indication information to the terminal device, the indication information comprising TPMI information, the TPMI information being used to determine a precoding method on the antenna ports corresponding to the first SRS resource and the second SRS resource, the first SRS resource group comprising a first SRS resource, and the second SRS resource group comprising a second SRS resource.

[0007] In a third aspect, an embodiment of the present application provides a terminal device, which includes: a first receiving unit for receiving configuration information sent by a network device, the configuration information being used to configure a first SRS resource group and a second SRS resource group, the first SRS resource group including one or more SRS resources of two antenna ports, and the second SRS resource group including one or more SRS resources of a single antenna port; a first sending unit for sending SRS on the first SRS resource group and the second SRS resource group; a second receiving unit for receiving indication information sent by the network device, the indication information including TPMI information, the TPMI information being used to determine the precoding method on the antenna ports corresponding to the first SRS resource and the second SRS resource, the first SRS resource group including the first SRS resource, and the second SRS resource group including the second SRS resource.

[0008] In a fourth aspect, an embodiment of the present application provides a network device, which includes: a second sending unit, used to send configuration information to a terminal device, where the configuration information is used to configure a first SRS resource group and a second SRS resource group, where the first SRS resource group includes one or more SRS resources of two antenna ports, and the second SRS resource group includes one or more SRS resources of a single antenna port; a third receiving unit, used to receive the SRS sent by the terminal device on the first SRS resource group and the second SRS resource group; the third sending unit, used to send indication information to the terminal device, where the indication information includes TPMI information, where the TPMI information is used to determine the precoding method on the antenna ports corresponding to the first SRS resource and the second SRS resource, where the first SRS resource group includes the first SRS resource, and the second SRS resource group includes the second SRS resource.

[0009] In a fifth aspect, an embodiment of the present application provides a terminal device comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0010] In a sixth aspect, an embodiment of the present application provides a network device comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0011] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided in the embodiment of the present application.

[0012] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a terminal device and / or a network device to execute part or all of the steps in the methods of the above aspects.

[0013] In a ninth aspect, embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, wherein the computer program is operable to cause a terminal device and / or a network device to perform some or all of the steps of the methods described in each of the above aspects. In some implementations, the computer program product may be a software installation package.

[0014] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0015] Based on the present application, the uplink channel information measured in the first SRS resource (SRS resource for 2 antenna ports) and the second SRS resource (SRS resource for a single antenna port) can be used to schedule the same uplink channel or signal, thereby supporting uplink transmission based on 3 antenna ports. For example, an equivalent SRS resource for 3 antenna ports can be formed by an SRS resource for 2 antenna ports and an SRS resource for 1 antenna port. Compared with 2 antenna ports, supporting uplink transmission of 3 antenna ports can significantly improve the uplink spectrum efficiency. Moreover, the present application can constitute an SRS resource for 3 antenna ports based on the SRS resources of 2 antenna ports and a single antenna port in the related technology. Therefore, the present application does not need to introduce a new SRS resource for 3 antenna ports, thereby realizing 3-port transmission with lower standardization complexity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a wireless communication system used in an embodiment of the present application.

[0017] FIG2 is a diagram illustrating an example of an uplink precoding process using a codebook-based precoding method.

[0018] FIG3 is a schematic flowchart of a wireless communication method provided in an embodiment of the present application.

[0019] FIG4 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0020] FIG5 is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0021] FIG6 is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solution in this application will be described below with reference to the accompanying drawings.

[0023] Communication System

[0024] FIG1 illustrates a wireless communication system 100 used in an embodiment of the present application. The wireless communication system 100 may include communication devices. The communication devices may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120.

[0025] FIG1 exemplarily shows a network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0026] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiment of the present application.

[0027] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: fifth generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, etc.

[0028] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiments of the present application may refer to a device that provides voice and / or data connectivity to a user and can be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity that provides sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D). For example, a cellular phone and a car communicate with each other using sidelink signals. The cellular phone and smart home devices communicate without relaying the communication signal through a base station.

[0029] The network device in the embodiments of the present application may be a device for communicating with a terminal device. The network device may also include an access network device. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 120 located within the coverage area. The access network device may also be referred to as a radio access network device or a base station. The access network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects the terminal device to a wireless network. Access network equipment can broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. A base station may also refer to a communication module, modem, or chip used to be set in the aforementioned device or apparatus. A base station may also be a mobile switching center and a device that performs base station functions in D2D, V2X, and machine-to-machine (M2M) communications, a network-side device in a 6G network, or a device that performs base station functions in future communication systems. A base station may support networks with the same or different access technologies. The embodiments of this application do not limit the specific technology and specific device form used by the access network device.

[0030] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0031] The communication equipment involved in a wireless communication system can include not only access network equipment and terminal equipment, but also core network elements. Core network elements can be implemented by devices, that is, core network elements are core network devices. It is understood that core network devices can also be a type of network equipment.

[0032] The core network elements in the embodiments of the present application may include network elements that process and forward user signaling and data. For example, the core network equipment may include core network access and mobility management function (AMF), session management function (SMF), user plane gateway, location management function (LMF) and other core network equipment. Among them, the user plane gateway may be a server with functions such as mobility management, routing, and forwarding of user plane data, generally located on the network side, such as a serving gateway (SGW) or a packet data network gateway (PGW) or a user plane network element function entity (UPF). Of course, the core network may also include other network elements, which are not listed here one by one.

[0033] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device may include a CU and a DU. The gNB may also include an AAU.

[0034] The network equipment and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed in the air on aircraft, balloons, and satellites. The embodiments of this application do not limit the scenarios in which the network equipment and terminal devices are located.

[0035] It should be understood that all or part of the functions of the communication device in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform).

[0036] Precoding processing

[0037] During the interaction between terminal devices and network equipment, data can be precoded. Precoding can achieve precoding gain. Precoding can be divided into two parts: analog domain processing and digital domain processing. Analog domain processing targets transmitted analog signals and maps RF signals to physical antennas. For example, analog domain processing can be implemented through beamforming. Digital domain processing targets digital signals and maps transport layer data to RF ports. Digital domain processing can be performed at baseband, for example, using a precoding matrix to precode digital signals.

[0038] When a terminal device sends uplink data to a network device, it can precode the uplink data. This precoding process can achieve uplink precoding gain for the uplink data. For example, for the physical uplink shared channel (PUSCH), the terminal device can precode the PUSCH.

[0039] Because terminal devices have a limited number of RF channels, they can use both of the above methods simultaneously when precoding uplink data. That is, they can precode digital signals and then use beamforming on analog signals.

[0040] Uplink data transmission can be categorized as codebook-based or non-codebook-based. In codebook-based transmission, each codeword in the codebook corresponds to a precoding matrix. Codebook-based and non-codebook-based transmissions use different precoding schemes.

[0041] The uplink precoding process is described below by taking the uplink codebook-based precoding method shown in FIG2 as an example.

[0042] The network device may configure an SRS resource set dedicated for codebook transmission for the terminal device. FIG2 is illustrated by taking an example in which the SRS resource set includes N SRS resources, where N may be an integer greater than or equal to 1.

[0043] In step S210, the terminal device transmits an SRS on N SRS resources, wherein the SRS on each SRS resource may be transmitted using a different beam.

[0044] In step S220, the network device selects an SRS resource from N SRS resources (such as the SRS resource with the best signal quality). The SRS resource selected by the network device can be indicated by an SRS resource indication (sounding reference signal resource indicator, SRI). The SRS resource indicated by the SRI can also be used to obtain uplink channel state information (channel state information, CSI). The network device can also determine at least one of the following information: a transmit precoding matrix indicator (TPMI), a rank indication (RI), or a channel quality indicator (CQI). Among them, the PMI can be selected from a codebook; the RI or CQI can be obtained based on the selected PMI.

[0045] In step S230, the network device sends one or more of the following to the terminal device through downlink control information (DCI): SRI, transmit rank indicator (TRI), TPMI, and modulation and coding scheme (MCS).

[0046] In step S240, the terminal device may determine the number of layers based on the TRI, and determine the uplink precoding matrix (or precoder) corresponding to the TPMI from the codebook according to the TRI and the TPMI.

[0047] The terminal device can use the beam corresponding to the SRS resource indicated by the SRI to perform simulated beamforming on the data.

[0048] In step S250 , the terminal device sends the precoded uplink data and a demodulation reference signal (DMRS) to the network device.

[0049] Uplink codebook

[0050] Related technology The uplink supports the transmission of 2-port and 4-port PUSCH. The codebooks (represented by W) used by different transmission layers (different multiple access modes are also distinguished when single layer) under different numbers of antenna ports can be shown in Tables 1 to 7. If the terminal device only supports non-coherent codebooks, each data stream can only be sent on one antenna port and one antenna port can only send one data stream (transport layer). If the terminal device supports partially coherent codebooks, each data stream can be transmitted on a coherent antenna port. In other words, data streams cannot be transmitted simultaneously on non-coherent antenna ports.

[0051] Table 1 Codebook used for 2 antenna ports and 1 layer transmission

[0052] Table 2 Codebook used for 4 antenna ports, 1-layer transmission, discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM)

[0053] Table 3 Codebook used for 4 antenna ports, 1-layer transmission, and cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM)

[0054] Table 4 Codebook used by DFT-S-OFDM with 2 antenna ports and 2-layer transmission

[0055] Table 5 Codebook used by CP-OFDM with 4 antenna ports and 2-layer transmission

[0056] Table 6 Codebook used by CP-OFDM with 4 antenna ports and 3-layer transmission

[0057] Table 7 Codebook used by CP-OFDM with 4 antenna ports and 4-layer transmission

[0058] It should be noted that if the relative phase variation of the signals sent from the antenna ports is within a certain range, these SRS ports can be said to be coherent (or phase-consistent).

[0059] In some implementations, the antenna port coherence metric (or requirement) may be protocol-defined or network device-configured. For example, the metric may be defined by thresholds p and m. In another example, the metric may be defined by duration t and threshold p / m.

[0060] Exemplarily, the coherence index may include: if the relative phase change does not exceed a threshold p and the relative power error does not exceed m, the coherence index is met; otherwise, the coherence index is not met.

[0061] Exemplarily, the coherence metric may be: if the relative phase variation within duration t does not exceed threshold p, and the relative power error does not exceed threshold m, then the coherence metric is met; otherwise, the coherence metric is not met. For example, if the relative phase variation of the signal transmitted by the transmitting antenna or antenna port of the terminal device within a duration of 20ms does not exceed 40 degrees and the power error does not exceed 4dB, then the signal at the antenna port meets the coherence metric.

[0062] It can be seen that the relevant technology supports codebook-based precoding processing for 2 antenna ports and 4 antenna ports. However, some terminal devices have 3 transmitting antennas. Since the relevant technology cannot support codebook-based precoding processing for 3 antenna ports, these terminal devices can only degenerate to 2-antenna port transmission, that is, using a 2-port codebook for uplink transmission. The gain of the 3 transmitting antennas cannot be fully utilized, resulting in affected spectrum efficiency. If uplink transmission of 3 antenna ports is to be supported, corresponding SRS resources supporting 3 antenna ports are required for uplink channel detection. However, the relevant protocol only supports SRS resources for 1, 2, 4 or 8 antenna ports. The additional introduction of SRS resources for 3 antenna ports requires significant standardization work, such as the need to solve the problem of how to determine the comb configuration, cyclic shift configuration, physical resources, sequence, etc. of the 3 SRS ports.

[0063] FIG3 is a schematic flow chart of a wireless communication method provided by an embodiment of the present application to solve the above-mentioned problem. The method shown in FIG3 can be executed by a terminal device and a network device. The method shown in FIG3 can include steps S310 to S330.

[0064] Step S310: The terminal device receives configuration information sent by the network device.

[0065] The configuration information can be used to configure a first SRS resource group and a second SRS resource group. The first SRS resource group can include one or more SRS resources for two antenna ports. The second SRS resource group can include one or more SRS resources for a single antenna port. In other words, the configuration information can be used to configure SRS resources for two antenna ports and SRS resources for a single antenna port.

[0066] This application does not limit the message that carries the configuration information. For example, the configuration information can be carried in a radio resource control (RRC) message.

[0067] Step S320: The terminal device sends an SRS to the network device on the first SRS resource group and the second SRS resource group.

[0068] Step S330: The network device sends instruction information to the terminal device.

[0069] The indication information may be used to indicate TPMI information. The TPMI information is used to determine the precoding method for the antenna ports corresponding to the first SRS resource and the second SRS resource. The first SRS resource group includes the first SRS resource. The second SRS resource group includes the second SRS resource. The TPMI information may be determined by the network device based on the received SRS.

[0070] This application does not limit the message that carries the indication information. For example, the indication information may be indicated by DCI.

[0071] Exemplarily, the terminal device may determine the TPMI information based on the received indication information, and determine the precoding method of the antenna ports corresponding to the first SRS resource and the second SRS resource.

[0072] Based on the present application, the uplink channel information obtained by measuring the combination of the first SRS resource and the second SRS resource can be used to schedule the same uplink signal or channel (for example, the same PUSCH), thereby supporting uplink PUSCH transmission based on 3 antenna ports. For example, an equivalent 3-antenna-port SRS resource can be formed by an SRS resource with 2 antenna ports and an SRS resource with 1 antenna port. Compared with 2 antenna ports, supporting uplink transmission with 3 antenna ports can significantly improve the uplink spectrum efficiency. Moreover, the present application can constitute an SRS resource with 3 antenna ports based on the SRS resources of 2 antenna ports and a single antenna port in the related technology. Therefore, there is no need to introduce a new 3-antenna-port SRS resource, so that 3-port transmission can be achieved with very low standardization complexity.

[0073] In some embodiments, the first SRS resource group and the second SRS resource group may be two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group may belong to two different SRS resource sets.

[0074] It should be noted that for an SRS resource set, some SRS parameters can be configured for the SRS resource set, rather than for each SRS resource separately, so that the SRS resources in the same SRS resource set can share these SRS parameters. These some SRS parameters may include one or more of the following parameters: time slot configuration, power control parameters, etc. Therefore, when the first SRS resource group and the second SRS resource group belong to the same SRS resource set, the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group can share some SRS parameters.

[0075] In some embodiments, some parameters of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group may be the same, so that uplink channel information measured based on the two SRS resource groups can be used to schedule the same PUSCH.

[0076] Optionally, one or more of the following configurations of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group may be the same: frequency domain resources, time slot configuration, OFDM symbol configuration, frequency domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb offset hopping configuration, and power control parameters. These are described below.

[0077] Frequency domain resources can be used to configure physical resource blocks (PRBs) used for SRS resource transmission. If the frequency domain resources of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same PRBs for SRS transmission.

[0078] The time slot configuration can be used to configure the time slot that the SRS resources are in. When the time slot configurations of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same time slot for transmitting the SRS.

[0079] OFDM symbol configuration can be used to configure the OFDM symbols where the SRS resources are located. When the OFDM symbol configurations of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same OFDM symbols to transmit the SRS.

[0080] Frequency hopping configuration can be used to configure frequency hopping parameters used by SRS resources. If the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group have the same frequency hopping, the two SRS resource groups can use the same frequency hopping.

[0081] The sequence hopping configuration can be used to configure sequence hopping parameters used by the SRS sequence. If the sequence hopping of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same sequence hopping to obtain the same base sequence.

[0082] The cyclic shift hopping configuration can be used to configure the cyclic shift hopping parameters used by the SRS resources. If the cyclic shift hopping of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same cyclic shift hopping.

[0083] The comb offset hopping configuration can be used to configure the comb offset hopping parameters used by the SRS resources. If the comb offset hopping parameters of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same comb offset hopping parameters to obtain the same comb offset.

[0084] The power control parameter can be used to configure the power control parameter used by the SRS resources. When the power control parameters of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same, the two SRS resource groups can use the same transmit power to transmit the SRS.

[0085] In some embodiments, each SRS resource in the first SRS resource group may correspond to (or have a corresponding relationship with) at least one SRS resource in the second SRS resource group. This application provides Method 1 and Method 2 to implement the correspondence of SRS resources, which are described below respectively.

[0086] In Method 1, the first SRS resource group and the second SRS resource group may include the same number of SRS resources, and the SRS resources in the first SRS resource group correspond one-to-one with the SRS resources in the second SRS resource group. For example, the nth SRS resource in the first SRS resource group corresponds to the nth SRS resource in the second SRS resource group. Where n can be a positive integer.

[0087] In mode 2, the first SRS resource group and the second SRS resource group may contain different numbers of SRS resources, with one SRS resource in the first SRS resource group corresponding to one SRS resource in the second SRS resource group (referred to as an SRS resource pair). One SRS resource may correspond to multiple resources (i.e., multiple resources may be combined to form a three-antenna port SRS).

[0088] For example, if the first SRS resource group includes N (N>1) 2-port SRS resources and the second SRS resource group includes one single-port SRS resource, each 2-port SRS resource may correspond to the single-port SRS resource.

[0089] For another example, if the first SRS resource group contains N (N>1) two-port SRS resources and the second SRS resource group contains M (M>1) single-port SRS resources, the correspondence between the SRS resources can be configured by the network device or specified by the protocol. N and M can be different. For example, SRS resource 1 in the first SRS resource group can correspond to SRS resource 3 in the second SRS resource group, SRS resource 2 in the first SRS resource group can correspond to SRS resource 5 in the second SRS resource group, and so on.

[0090] In one embodiment, the two corresponding SRS resources include 2 and 1 antenna ports respectively, and thus can be used to transmit an SRS with 3 antenna ports. That is, an equivalent SRS resource with 3 antenna ports can be formed by using an SRS resource with 2 antenna ports and an SRS resource with 1 antenna port.

[0091] It should be noted that the corresponding two SRS resources can meet one or more of the following requirements: occupy the same physical resources, use the same transmit beam, and use the same transmit power, so that the equivalent three-antenna port SRS can be used for scheduling the same PUSCH. The physical resources may include time domain resources and / or frequency domain resources. The same transmit beam can be referred to as the same spatial domain transmission filter or the same antenna port.

[0092] As described above, the network device can determine the TPMI information based on the received SRS. For example, the network device can determine the precoding matrix from the predefined 3-antenna port codebook based on the channel information obtained from the SRS of the 3 antenna ports, and use the index of the matrix as the TPMI information. The SRS of the 3 antenna ports is obtained by combining the SRSs sent from the corresponding two SRS resources. In other words, the network device can combine the 2-port channel and the 1-port channel measured on the corresponding two SRS resources to obtain the 3-antenna port channel.

[0093] As described above, TPMI information can be used to determine the precoding matrix for the antenna ports corresponding to the first and second SRS resources. The first and second SRS resources can satisfy the corresponding relationship described above. The following example illustrates how, when the first and second SRS resources correspond, the precoding matrix for the antenna ports corresponding to the first and second SRS resources can be determined based on the TPMI information.

[0094] In some embodiments, the terminal device may determine a precoding matrix for three antenna ports based on the TPMI information. The three antenna ports are composed of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS resource. The precoding matrix for the three antenna ports may be predefined.

[0095] Exemplarily, the TPMI information may be used to indicate a TPMI index. The terminal device may determine a precoding matrix from a codebook for three antenna ports according to the TPMI index. The following example illustrates a codebook for three antenna ports.

[0096] In one embodiment, the codebook may be a non-coherent codebook (which may be used for non-coherent antenna ports). In this case, the codebook may include the following codewords:

[0097] In another embodiment, the codebook may be a partially coherent codebook (applicable to partially coherent antenna ports). In this case, the codebook may include the following codewords:

[0098] Rank=1:

[0099] Rank=2:

[0100] Rank=3:

[0101] Therefore, it can be seen that the TPMI information may include one TPMI, and this one TPMI may be used to determine a precoding matrix for three antenna ports. Therefore, this solution requires the use of a codebook for three antenna ports.

[0102] Optionally, the terminal device can use the precoding matrix of the three antenna ports indicated by the TPMI to precode the uplink data, and transmit the precoded uplink data on three antenna ports consisting of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS.

[0103] In some embodiments, the TPMI information may include a first TPMI and a second TPMI. The first TPMI may be used to determine the precoding scheme for the antenna port corresponding to the first SRS resource, and the second TPMI may be used to determine the precoding scheme for the antenna port corresponding to the second SRS resource. The network device may determine the first TPMI based on channel information measured from the first SRS resource and determine the second TPMI based on channel information measured from the second SRS resource. Thus, the first TPMI is associated with the first SRS resource group, and the second TPMI is associated with the second SRS resource group.

[0104] It is understood that in these embodiments, two groups of independent transmission antenna ports can be set to transmit SRS for 2 antenna ports and 1 antenna port respectively, and independent SRI / PMI are used to indicate SRS resources. Therefore, a codebook for 3 antenna ports may not be introduced.

[0105] The first TPMI may be used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or the first TPMI may be used to indicate a precoding matrix of 2 antenna ports.

[0106] In one embodiment, the first TPMI may include 2 bits of information. Two bits of the 2-bit information may be used to indicate whether the two antenna ports corresponding to the first SRS resource are used for data transmission. For example, the first bit may be used to indicate whether the first antenna port is used for data (e.g., PUSCH) transmission, and the second bit may be used to indicate whether the second antenna port is used for data (e.g., PUSCH) transmission. If both bits are 0, it may indicate that neither of the two antenna ports corresponding to the first SRS resource is used for data transmission.

[0107] In one embodiment, the first TPMI may include 2 bits of information. The 2 bits of information may be used to indicate a precoding matrix for 2 antenna ports. Furthermore, the 2 bits of information may also indicate that the 2 antenna ports corresponding to the first SRS resource are not used for data transmission, that is, the precoding matrix is For example, for a non-coherent terminal, the 2-bit information may be used to indicate one of the following information: the precoding matrix is The precoding matrix is The precoding matrix is 2 Antenna ports are not used for data transmission.

[0108] For example, the corresponding relationship between the value of the 2 bits of the first TPMI and the indicated information can be: 00 represents the precoding matrix 01 indicates the precoding matrix 10 represents the precoding matrix 11 means that the 2 antenna ports are not used for data transmission. It should be noted that this correspondence is only an example, and the actual indication value and indication content can be exchanged. For example, 00 can be used to indicate that the 2 antenna ports are not used for data transmission. In addition, here is the power normalization coefficient, which is used to ensure power normalization when the three antenna ports are used simultaneously.

[0109] In one embodiment, the first TPMI may contain more than 2 bits of information (e.g., 4 bits) to indicate a precoding matrix for 2 antenna ports. The precoding matrix may be used for a terminal device using a fully coherent antenna. For example, the information may be used to indicate that the precoding matrix is: or Or 2 antenna ports are not used for data transmission. and is the power normalization coefficient, which is used to ensure power normalization when the three antenna ports are used simultaneously.

[0110] The second TPMI may be used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission. For example, the second TPMI may consist of only one bit, used to indicate whether the antenna port is used for data transmission. For example, 0 may indicate that the antenna port is not used for data transmission, and 1 may indicate that the antenna port is used for data transmission. For another example, 1 may indicate that the antenna port is not used for data transmission, and 0 may indicate that the antenna port is used for data transmission.

[0111] In some embodiments, the first TPMI and the second TPMI may be used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource, respectively.

[0112] For example, for the first TPMI, if the first TPMI indicates whether the two antenna ports corresponding to the first SRS resource are used for data transmission, the number of transmission layers on the antenna port corresponding to the first SRS resource can be the number of antenna ports used for data transmission (0, 1, or 2). If the first TPMI is used to indicate a precoding matrix with two antenna ports, the number of transmission layers on the antenna port corresponding to the first SRS resource can be the number of columns of the precoding matrix. For the second TPMI, if the second TPMI indicates that the antenna port corresponding to the second SRS resource is used for data transmission, the number of transmission layers corresponding to the second SRS resource can be 1; if the second TPMI indicates that the antenna port corresponding to the second SRS resource is not used for data transmission, the number of transmission layers corresponding to the second SRS resource can be 0.

[0113] Optionally, the total number of transmission layers of the uplink data (ie, the uplink rank value) may be equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

[0114] It should be noted that the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna port is not used for data transmission, or the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot both be 0. This is to avoid having no antenna port for transmitting the scheduled uplink data.

[0115] In some embodiments, the terminal device may send the first information and the second information to the network device.

[0116] The first information may be used to indicate whether the two antenna ports corresponding to the first SRS resource can support full-power transmission. The second information may be used to indicate whether the one antenna port corresponding to the second SRS resource can support full-power transmission.

[0117] For example, the first information may include two bits, each indicating whether the first antenna port and the second antenna port can support full-power transmission, so that the network device can schedule the corresponding antenna ports to achieve a higher transmit power. For example, 10 may indicate that the first antenna port supports full-power transmission; 00 may indicate that neither antenna port supports full-power transmission, but can support full-power transmission when both antenna ports transmit simultaneously.

[0118] For another example, the second information may include 1 bit, indicating whether the antenna port corresponding to the second SRS resource can support full-power transmission. For example, 0 may indicate that full-power transmission is not supported, and 1 may indicate that full-power transmission is supported.

[0119] In some embodiments, the terminal device may receive SRI information sent by the network device, wherein the SRI information may be used to determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group, respectively.

[0120] It should be noted that if the first SRS resource group and the second SRS resource group each contain only one SRS resource, namely the first SRS resource and the second SRS resource, the network device may not send SRI information, and the terminal device may not receive SRI information. If the first SRS resource group or the second SRS resource group each contain multiple SRS resources, the network device may send SRI information, the terminal device may receive SRI information configured by the network device, and the terminal device may determine the first SRS resource and the second SRS resource from the first SRS resource group and / or the second SRS resource group based on the SRI information.

[0121] For the first SRS resource group or the second SRS resource group, the network device may select an optimal SRS resource according to received signal strengths of different SRS resources in one SRS resource group, and use the corresponding index as SRI information.

[0122] This application does not limit the indication method of SRI information. For example, the SRI can be indicated together with the TPMI through the same DCI. As a possible implementation method, the SRI information can include a first SRI and / or a second SRI, and the two SRIs can indicate different values. The first SRI can be used to determine the first SRS resource from the first SRS resource group, and the second SRI can be used to determine the second SRS resource from the second SRS resource group. In other words, the first SRI can be associated with the first SRS resource group, and the second SRI can be associated with the second SRS resource group.

[0123] It should be noted that the first SRI and the second SRI do not necessarily exist at the same time. When the first SRS resource group contains multiple SRS resources, the SRI information may include the first SRI; when the second SRS resource group contains multiple SRS resources, the SRI information may include the second SRI. Among them, when the TPMI information includes the first TPMI and the second TPMI, the first SRI is used to determine the first SRS resource, and the first TPMI is used to determine the precoding method on the antenna port corresponding to the first SRS resource. Therefore, the first SRI and the first TPMI are two related information; similarly, the second SRI is used to determine the second SRS resource, and the second TPMI is used to determine the precoding method on the antenna port corresponding to the second SRS resource. Therefore, the second SRI and the second TPMI are two related information.

[0124] As another possible implementation, the SRI information may include only one SRI, and the terminal device determines the first SRS resource and the second SRS with the same index from the two SRS resource groups according to the SRI. When the SRI information indicates the index n-1, the first SRS resource may correspond to the nth SRS resource in the first SRS resource group, and the second SRS resource may correspond to the nth SRS resource in the second SRS resource group. Wherein, n may be a positive integer. This implementation can be applied to the situation where the first SRS resource group and the second SRS resource group contain the same number of SRS resources, and the SRS resources in the first SRS resource group correspond one-to-one with the SRS resources in the second SRS resource group.

[0125] As another possible implementation, in the case where an SRS resource in the first SRS resource group corresponds to an SRS resource in the second SRS resource group as described above, the SRI information can indicate an SRS resource pair from the SRS resource pairs configured by the network device. Each SRS resource pair pre-configured by the network device includes an SRS resource in the first SRS resource group and an SRS resource in the second SRS resource group.

[0126] In some embodiments, after determining the precoding method, the terminal device may precode the uplink data according to the precoding method, and transmit the precoded data to the network device on the antenna port corresponding to the first SRS resource and the second SRS resource.

[0127] Optionally, each transmission layer in the uplink data can be mapped to a different antenna port among the antenna ports corresponding to the first SRS resource and the second SRS resource. In other words, up to three transmission layers can be transmitted in the uplink, with each transmission layer mapped to one antenna port, and unmapped antenna ports may not be used for uplink transmission.

[0128] In one embodiment, when the antenna ports corresponding to the first SRS resource and the second SRS resource are both used to transmit uplink data, the transmission layer in the uplink data can be first mapped to the antenna port corresponding to the first SRS resource and then mapped to the antenna port corresponding to the second SRS resource.

[0129] For example, when the number of transmission layers is 2 and the antenna ports corresponding to the two SRS resources each transmit one transmission layer, the first transmission layer can be mapped to the antenna port corresponding to the first SRS resource first, and then the second transmission layer can be mapped to the antenna port corresponding to the second SRS resource. When the number of transmission layers is 3, the first two transmission layers can be mapped to the antenna port corresponding to the first SRS resource first, and then the third transmission layer can be mapped to the antenna port corresponding to the second SRS resource.

[0130] For the case where the first SRS resource and the second SRS resource correspond to different SRIs or TPMIs (for example, the first SRS resource corresponds to the first TPMI, and the second SRS resource corresponds to the second TPMI), the present application proposes: when the SRI information indicates two SRIs, and / or the TPMI information indicates two TPMIs, the transport layer in the uplink data can first correspond to the first SRI (using the first SRI for the transport layer) and then correspond to the second SRI (using the second SRI for the transport layer), or the transport layer in the uplink data can first correspond to the first TPMI (using the first TPMI for the transport layer) and then correspond to the second TPMI (using the second TPMI for the corresponding transport layer). For example, when the number of transport layers is 3, the first TPMI is used for the first two transport layers, and the second TPMI is used for the third transport layer.

[0131] In another embodiment, when the antenna ports corresponding to the first SRS resource and the second SRS resource are both used to transmit uplink data, the transmission layer in the uplink data can be first mapped to the antenna port corresponding to the second SRS resource, and then mapped to the antenna port corresponding to the first SRS resource.

[0132] For example, when the number of transmission layers is 3, the first transmission layer may be mapped to the antenna port corresponding to the second SRS resource, and then the next two transmission layers may be mapped to the antenna ports corresponding to the first SRS resource.

[0133] For the case where the first SRS resource and the second SRS resource correspond to different SRIs or TPMIs (for example, the first SRS resource corresponds to the first TPMI, and the second SRS resource corresponds to the second TPMI), the present application proposes: when the SRI information indicates two SRIs, and / or the TPMI information indicates two TPMIs, the transport layer in the uplink data can first correspond to the second SRI (using the second SRI for the transport layer) and then correspond to the first SRI (using the first SRI for the transport layer); or, the transport layer in the uplink data can first correspond to the second TPMI (using the second TPMI for the transport layer) and then correspond to the first TPMI (using the first TPMI for the corresponding transport layer). For example, when the number of transport layers is 3, the first TPMI can be used for the last two transport layers, and the second TPMI can be used for the first transport layer.

[0134] For ease of understanding, the present application is described in detail below through Example 1 and Example 2.

[0135] Example 1

[0136] The method provided in Example 1 may include steps 1.1 to 1.5.

[0137] In step 1.1, the network device sends configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information sent by the network device. The configuration information is used to configure the first SRS resource group and the second SRS resource group.

[0138] The first SRS resource group includes one or more SRS resources of two antenna ports, and the second SRS resource group includes one or more SRS resources of a single antenna port;

[0139] The first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets. Specifically, some SRS parameters can be configured for the SRS resource set instead of configuring each SRS resource separately, so that SRS resources in the same SRS resource set can share these parameters, such as time slot configuration, power control parameters, etc.

[0140] The SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group may have some parameters that are the same, so that the uplink channel information measured by the two SRS resource groups can be used to schedule the same PUSCH. At least one of the following parameter configurations is the same: frequency domain resources; time slot configuration; OFDM symbol configuration; frequency domain hopping configuration; sequence hopping configuration; cyclic shift hopping configuration; comb offset hopping configuration; and power control parameters.

[0141] Optionally, each SRS resource in the first SRS resource group may correspond to at least one SRS resource in the second SRS resource group. The correspondence manner may be manner 1 or manner 2.

[0142] Mode 1: The first SRS resource group and the second SRS resource group include the same number of SRS resources, and the SRS resources in the first SRS resource group correspond one-to-one with the SRS resources in the second SRS resource group. For example, the nth SRS resource in the first SRS resource group corresponds to the nth SRS resource in the second SRS resource group.

[0143] Method 2: The first SRS resource group and the second SRS resource group can contain different numbers of SRS resources, and one SRS resource in the first SRS resource group corresponds to one SRS resource in the second SRS resource group (called an SRS resource pair), where one SRS resource can correspond to multiple resources (that is, it can be combined with multiple resources into an SRS with 3 antenna ports).

[0144] For example, the first SRS resource group includes N>1 2-port SRS resources, the second SRS resource group includes one single-port SRS resource, and each 2-port SRS resource corresponds to the one single-port SRS resource.

[0145] For example, the first SRS resource group contains N>1 2-port SRS resources, and the second SRS resource group contains M>1 single-port SRS resources. The correspondence between the SRS resources can be configured to the terminal by the network device, such as SRS resource 1 in the first SRS resource group and SRS resource 3 in the first SRS resource group, SRS resource 2 in the first SRS resource group and SRS resource 5 in the first SRS resource group, and so on.

[0146] In one embodiment, the two corresponding SRS resources include 2 and 1 antenna ports respectively, and thus can be used to transmit an SRS with 3 antenna ports. That is, an equivalent SRS resource with 3 antenna ports can be formed by using an SRS resource with 2 antenna ports and an SRS resource with 1 antenna port.

[0147] In order for the equivalent SRS of three antenna ports to be used for scheduling the same PUSCH, the corresponding two SRS resources meet one or more of the following requirements: occupy the same physical resources; use the same transmit beam; and use the same transmit power.

[0148] Step 1.2: The terminal device sends an SRS on the first SRS resource group and the second SRS resource group. Correspondingly, the network device receives the SRS sent by the terminal device on the first SRS resource group and the second SRS resource group.

[0149] In step 1.3, the network device determines TPMI information according to the received SRS and sends indication information to the terminal device, wherein the indication information includes the TPMI information.

[0150] For example, the network device can determine the precoding matrix from a predefined 3-antenna port codebook based on the channel information obtained from the SRS of the 3 antenna ports, and use the index of the matrix as the TPMI information. The SRS of the 3 antenna ports is obtained by combining the SRSs respectively transmitted from the corresponding two SRS resources. In other words, the network device can combine the 2-port channel and the 1-port channel respectively measured on the corresponding two SRS resources to obtain the 3-antenna port channel.

[0151] Furthermore, if the first SRS resource group or the second SRS resource group includes multiple SRS resources, the network device may also determine SRI information based on the received SRS. The network device may select the optimal SRS resource based on the received signal strength of different SRS resources within an SRS resource group and use the corresponding index as the SRI information.

[0152] In step 1.4, the terminal device receives TPMI information configured by the network device and determines, based on the TPMI information, a precoding mode for the antenna ports corresponding to the first SRS resource and the second SRS resource. The first SRS resource group includes the first SRS resource, the second SRS resource group includes the second SRS resource, and the first SRS resource and the second SRS resource satisfy the corresponding relationship in step 1.1.

[0153] The terminal device can determine a precoding matrix for three antenna ports based on the TPMI information, where the three antenna ports are composed of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS resource. The TPMI information is used to indicate a TPMI index, and the terminal device can determine the precoding matrix from a predefined three-antenna-port codebook based on the index.

[0154] In one embodiment, the codebook is a non-coherent codebook (i.e., for non-coherent antenna ports), and the codebook may include the following codewords:

[0155] In another embodiment, the codebook is a partially coherent codebook (i.e., for partially coherent antenna ports), and the codebook may include the following codewords:

[0156] Rank=1:

[0157] Rank=2:

[0158] Rank=3:

[0159] It should be noted that if the first SRS resource group and the second SRS resource group each contain only one SRS resource, namely the first SRS resource and the second SRS resource, the network device does not need to send SRI information, and the terminal device does not need to receive SRI information. If the first SRS resource group or the second SRS resource group contains multiple SRS resources, the terminal device needs to receive the SRI information configured by the network device and determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group respectively based on the SRI information.

[0160] If the correspondence between SRS resources adopts the aforementioned correspondence method 1, the SRI information indicates an index value n-1, which corresponds to the nth SRS resource in the first SRS resource group and the nth SRS resource in the second SRS resource group. In other words, the SRI information indicates only one index value, and the terminal device determines the first SRS resource from the first SRS resource and the second SRS resource from the second SRS resource based on the index value.

[0161] If the correspondence between SRS resources adopts the aforementioned correspondence method 2, the SRI information may indicate an SRS resource pair from the SRS resource pairs configured by the network device, wherein each SRS resource pair configured by the network device includes an SRS resource in the first SRS resource group and an SRS resource in the second SRS resource group.

[0162] In step 1.5, the terminal device precodes the uplink data according to the precoding method, and transmits the precoded data on the antenna ports corresponding to the first SRS resource and the second SRS resource.

[0163] Exemplarily, the terminal device precodes the uplink data using the precoding matrix of the three antenna ports indicated by the TPMI, and transmits the precoded uplink data on three antenna ports consisting of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS.

[0164] It is understandable that, in embodiment 1, one TPMI may be used to determine the precoding mode on three ports. Furthermore, embodiment 1 needs to be implemented in combination with a three-port codebook.

[0165] Example 2

[0166] The method provided in Example 2 may include steps 2.1 to 2.4.

[0167] Step 2.1: The network device sends configuration information to the terminal device. The terminal device receives the configuration information. The configuration information is used to configure the first SRS resource group and the second SRS resource group.

[0168] The first SRS resource group includes one or more SRS resources of two antenna ports, and the second SRS resource group includes one or more SRS resources of a single antenna port;

[0169] The first SRS resource group and the second SRS resource group are two different SRS resource sets. The SRS resources in the two SRS resource sets may be the same or different.

[0170] In order to ensure that the uplink channel information measured by the two SRS resource groups can be used to schedule the same PUSCH, at least one of the following parameter configurations of the two SRS resource groups is the same: frequency domain resources, time slot configuration, OFDM symbol configuration, frequency domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb offset hopping configuration, and power control parameters.

[0171] Step 2.1: The terminal device sends an SRS on the first SRS resource group and the second SRS resource group. Correspondingly, the network device receives the SRS sent by the terminal device on the first SRS resource group and the second SRS resource group.

[0172] In step 2.2, the network device determines TPMI information according to the received SRS and sends indication information to the terminal device, wherein the indication information includes the TPMI information.

[0173] The TPMI information includes a first TPMI and a second TPMI. The network device can determine the first TPMI based on the channel information measured from the first SRS resource and determine the second TPMI based on the channel information measured from the second SRS resource. The first TPMI is used to determine the precoding method for the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding method for the antenna port corresponding to the second SRS resource.

[0174] If the first SRS resource group and the second SRS resource group contain only one SRS resource, they are the first SRS resource and the second SRS resource. If the first SRS resource group or the second SRS resource group contains multiple SRS resources, the network device can also determine SRI information based on the received SRS, and indicate the first SRS resource and the second SRS resource through the SRI information. Among them, the network device can select the optimal SRS resource from different SRS resources within an SRS resource group based on the received signal strength, and use the corresponding index as the SRI information, so the SRI information can include two indexes (SRI) corresponding to the first SRS resource group and the second SRS resource group.

[0175] In step 2.3, the terminal device receives the TPMI information indicated by the network device, and determines the precoding mode on the antenna ports corresponding to the first SRS resource and the second SRS resource according to the TPMI information.

[0176] The first SRS resource group includes the first SRS resources, and the second SRS resource group includes the second SRS resources.

[0177] The first SRS resource and the second SRS resource may be determined based on SRI information of the network device.

[0178] If the first SRS resource group and the second SRS resource group each contain only one SRS resource, namely the first SRS resource and the second SRS resource, the network device does not need to send SRI information, and the terminal device does not need to receive SRI information; if the first SRS resource group or the second SRS resource group contains multiple SRS resources, the terminal device can receive the SRI information configured by the network device, and determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group respectively based on the SRI information.

[0179] In one embodiment, the SRI information includes a first SRI and a second SRI, wherein the first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group. In other words, the first SRI is associated with the first SRS resource group, and the second SRI is associated with the second SRS resource group.

[0180] It should be noted that the first SRI and the second SRI do not necessarily exist at the same time. When the first SRS resource group includes multiple SRS resources, the SRI information includes the first SRI; when the second SRS resource group includes multiple SRS resources, the SRI information includes the second SRI.

[0181] As described above, the TPMI information includes a first TPMI and a second TPMI. The first TPMI is used to determine the precoding method for the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding method for the antenna port corresponding to the second SRS resource. In other words, the first TPMI is associated with the first SRS resource group, and the second TPMI is associated with the second SRS resource group.

[0182] The first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, or is used to indicate a precoding matrix of 2 antenna ports.

[0183] In one embodiment, the first TPMI includes two bits of information, each of which is used to indicate whether the two antenna ports corresponding to the first SRS resource are used for data transmission. For example, the first bit is used to indicate whether the first antenna port is used for data (PUSCH) transmission, and the second bit is used to indicate whether the second antenna port is used for data (PUSCH) transmission. If both bits are 0, it means that neither of the two antenna ports corresponding to the first SRS resource is used for data transmission.

[0184] In another embodiment, the first TPMI includes 2 bits of information for indicating a precoding matrix of 2 antenna ports, and can also indicate that the 2 antenna ports corresponding to the first SRS resource are not used for data transmission, that is, the precoding matrix is For example, for a non-coherent terminal, the 2 bits may be used to indicate one of the following information: 00 indicates the precoding matrix 01 indicates the precoding matrix 10 represents the precoding matrix 11 indicates that the two antenna ports are not used for data transmission.

[0185] It should be noted that the value and indication content of the 2-bit information contained in the first TPMI are only examples, and the actual indication value and indication content can be exchanged. For example, 00 can be used to indicate that the 2 antenna ports are not used for data transmission. In addition, here is the power normalization coefficient, which is used to ensure power normalization when the three antenna ports are used simultaneously.

[0186] In another embodiment, the first TPMI may include more than 2 bits of information (e.g., 4 bits) to indicate a precoding matrix for 2 antenna ports, which may be used for a fully coherent terminal. For example, the information may be used to indicate one of the following information: And the 2 antenna ports are not used for data transmission. and is the power normalization coefficient, which is used to ensure power normalization when the three antenna ports are used simultaneously.

[0187] Exemplarily, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission. That is, the second TPMI may have only one bit, used to indicate whether the antenna port is used for data transmission, for example, 0 indicates not used for data transmission, and 1 indicates used for data transmission.

[0188] Furthermore, the first TPMI and the second TPMI are further used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource, respectively.

[0189] Optionally, the number of transmission layers can be determined based on the information indicated by the TPMI. For example, if the first TPMI indicates whether the two antenna ports corresponding to the first SRS resource are used for data transmission, the number of transmission layers on the antenna port corresponding to the first SRS resource is the number of antenna ports used for data transmission (0, 1, or 2). If the first TPMI is used to indicate a precoding matrix with two antenna ports, the number of transmission layers on the antenna port corresponding to the first SRS resource is the number of columns of the precoding matrix. For the second TPMI, if it indicates that the antenna port corresponding to the second SRS resource is used for data transmission, the number of transmission layers corresponding to the second SRS resource is 1; otherwise, the number of transmission layers corresponding to the second SRS resource is 0.

[0190] Optionally, the total number of transmission layers of uplink data, that is, the uplink rank value, is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

[0191] It should be noted that the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna port is not used for data transmission, that is, the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 at the same time, otherwise there will be no antenna port for transmitting the scheduled uplink data.

[0192] In one embodiment, the terminal device can report first information and second information to the network device through UE capabilities, where the first information is used to indicate whether the two antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the one antenna port corresponding to the second SRS resource can support full-power transmission.

[0193] For example, the first information may include two bits, each indicating whether the first antenna port and the second antenna port can support full-power transmission, so that the network device can schedule the corresponding antenna ports to achieve a higher transmit power. For example, 10 indicates that the first antenna port supports full-power transmission, and 00 indicates that neither antenna port supports full-power transmission, but can support full-power transmission when both antenna ports transmit simultaneously.

[0194] For example, the second information may include 1 bit, indicating whether the antenna port corresponding to the second SRS resource can support full-power transmission. For example, 0 indicates not supported, and 1 indicates supported.

[0195] In step 2.4, the terminal device precodes the uplink data according to the precoding method, and transmits the precoded data on the antenna ports corresponding to the first SRS resource and the second SRS resource.

[0196] Exemplarily, each transmission layer in the uplink data is mapped to a different antenna port. That is, uplink can transmit up to three transmission layers, each transmission layer is mapped to one antenna port, and unmapped antenna ports are not used for uplink transmission.

[0197] In one embodiment, when the antenna ports corresponding to the first SRS resource and the second SRS resource are both used to transmit uplink data, the transmission layer in the uplink data is first mapped to the antenna port corresponding to the first SRS resource, and then mapped to the antenna port corresponding to the second SRS resource.

[0198] For example, when the number of transmission layers is 2, and the antenna ports corresponding to the two SRS resources each transmit one transmission layer, the first transmission layer is first mapped to the antenna port corresponding to the first SRS resource, and then the second transmission layer is mapped to the antenna port corresponding to the second SRS resource; when the number of transmission layers is 3, the first two transmission layers are first mapped to the antenna port corresponding to the first SRS resource, and then the third transmission layer is mapped to the antenna port corresponding to the second SRS resource.

[0199] Since the first SRS resource and the second SRS resource correspond to different SRIs or TPMIs, the method can also be implemented as follows: when the SRI information indicates two SRIs, or the TPMI information indicates two TPMIs, the transport layer in the uplink data is first mapped to the first SRI (the first SRI is used for the transport layer), and then mapped to the second SRI (the second SRI is used for the transport layer), or the transport layer in the uplink data is first mapped to the first TPMI (the first TPMI is used for the transport layer), and then mapped to the second TPMI (the second TPMI is used for the corresponding transport layer). For example, when the number of transport layers is 3, the first TPMI is used for the first two transport layers, and the second TPMI is used for the third transport layer.

[0200] In another embodiment, when the antenna ports corresponding to the first SRS resource and the second SRS resource are both used to transmit uplink data, the transmission layer in the uplink data is first mapped to the antenna port corresponding to the second SRS resource, and then mapped to the antenna port corresponding to the first SRS resource.

[0201] For example, when the number of transmission layers is 3, the first transmission layer is first mapped to the antenna port corresponding to the second SRS resource, and then the next two transmission layers are mapped to the antenna ports corresponding to the first SRS resource.

[0202] Since the first SRS resource and the second SRS resource correspond to different SRIs or TPMIs, the method can also be implemented as follows: when the SRI information indicates two SRIs, or the TPMI information indicates two TPMIs, the transport layer in the uplink data is first mapped to the second SRI (the second SRI is used for the transport layer), and then mapped to the first SRI (the first SRI is used for the transport layer), or the transport layer in the uplink data is first mapped to the second TPMI (the second TPMI is used for the transport layer), and then mapped to the first TPMI (the first TPMI is used for the corresponding transport layer). For example, when the number of transport layers is 3, the first TPMI is used for the last two transport layers, and the second TPMI is used for the first transport layer.

[0203] It is understandable that, in embodiment 2, the first TPMI for 2 ports and the second TPMI for 1 port may be indicated or used respectively. Therefore, embodiment 2 may be implemented based on the 2-port codebook in the related art.

[0204] The method embodiments of the present application are described in detail above, and the device embodiments of the present application are described in detail below. It should be understood that the description of the method embodiments corresponds to the description of the device embodiments, so for parts not described in detail, reference can be made to the above method embodiments.

[0205] 4 is a schematic structural diagram of a terminal device 400 provided in an embodiment of the present application. The terminal device 400 may include: a first receiving unit 410 , a first sending unit 420 , and a second receiving unit 430 .

[0206] The first receiving unit 410 is used to receive configuration information sent by the network device, where the configuration information is used to configure a first SRS resource group and a second SRS resource group. The first SRS resource group includes one or more SRS resources of two antenna ports, and the second SRS resource group includes one or more SRS resources of a single antenna port.

[0207] The first sending unit 420 is configured to send SRS on the first SRS resource group and the second SRS resource group.

[0208] The second receiving unit 430 is used to receive indication information sent by the network device, where the indication information includes TPMI information, and the TPMI information is used to determine the precoding mode on the antenna port corresponding to the first SRS resource and the second SRS resource. The first SRS resource group includes the first SRS resource, and the second SRS resource group includes the second SRS resource.

[0209] In some embodiments, the first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets.

[0210] In some embodiments, the SRS resources within the first SRS resource group are the same as one or more of the following configurations of the SRS resources within the second SRS resource group: frequency domain resources, time slot configuration, OFDM symbol configuration, frequency domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb offset hopping configuration, and power control parameters.

[0211] In some embodiments, each SRS resource in the first SRS resource group corresponds to at least one SRS resource in the second SRS resource group.

[0212] In some embodiments, the first SRS resource group and the second SRS resource group include the same number of SRS resources, and the SRS resources in the first SRS resource group correspond one-to-one to the SRS resources in the second SRS resource group.

[0213] In some embodiments, the two corresponding SRS resources satisfy one or more of the following: occupying the same physical resources; using the same transmission beam; and using the same transmission power.

[0214] In some embodiments, the TPMI information is used to indicate a precoding matrix of three antenna ports, where the three antenna ports are composed of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS resource.

[0215] In some embodiments, the TPMI information includes a first TPMI and a second TPMI, the first TPMI is used to determine the precoding mode on the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding mode on the antenna port corresponding to the second SRS resource.

[0216] In some embodiments, the first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or the first TPMI is used to indicate a precoding matrix of 2 antenna ports.

[0217] In some embodiments, the first TPMI includes 2 bits of information, 2 bits of which are used to indicate whether the 2 antenna ports corresponding to the first SRS resource are used for data transmission, or the 2 bits of information are used to indicate one of the following information: the precoding matrix is The precoding matrix is The precoding matrix is 2 Antenna ports are not used for data transmission.

[0218] In some embodiments, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission.

[0219] In some embodiments, the first TPMI and the second TPMI are further used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource, respectively.

[0220] In some embodiments, the total number of transmission layers of the uplink data is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

[0221] In some embodiments, the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna port is not used for data transmission, or the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 at the same time.

[0222] In some embodiments, the terminal device is also used to: send first information and second information to the network device; wherein the first information is used to indicate whether the two antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the one antenna port corresponding to the second SRS resource can support full-power transmission.

[0223] In some embodiments, the terminal device is further used to: receive SRS resource indication SRI information sent by the network device; wherein the SRI information is used to determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group respectively.

[0224] In some embodiments, when the SRI information indicates an index n-1, the first SRS resource corresponds to the nth SRS resource in the first SRS resource group, and the second SRS resource corresponds to the nth SRS resource in the second SRS resource group.

[0225] In some embodiments, the SRI information includes a first SRI and a second SRI, the first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group.

[0226] In some embodiments, the terminal device is further configured to: precode uplink data according to a precoding method; and transmit the precoded data on antenna ports corresponding to the first SRS resource and the second SRS resource.

[0227] In some embodiments, each transmission layer in the uplink data is mapped to different antenna ports among the antenna ports corresponding to the first SRS resource and the second SRS resource.

[0228] In some embodiments, the transmission layer in the uplink data is first mapped to the antenna port corresponding to the first SRS resource, and then mapped to the antenna port corresponding to the second SRS resource, or the transmission layer in the uplink data is first mapped to the antenna port corresponding to the second SRS resource, and then mapped to the antenna port corresponding to the first SRS resource.

[0229] In an optional embodiment, the first receiving unit 410, the first sending unit 420 or the second receiving unit 430 may be a transceiver 630. The network device 500 may further include a processor 610 and a memory 620, as specifically shown in FIG6 .

[0230] 5 is a schematic structural diagram of a network device 500 provided in an embodiment of the present application. The network device 500 includes a second sending unit 510, a third receiving unit 520, and a third sending unit 530.

[0231] The second sending unit 510 is used to send configuration information to the terminal device, where the configuration information is used to configure a first SRS resource group and a second SRS resource group, where the first SRS resource group includes one or more SRS resources for two antenna ports, and the second SRS resource group includes one or more SRS resources for a single antenna port.

[0232] The third receiving unit 520 is configured to receive the SRS sent by the terminal device on the first SRS resource group and the second SRS resource group.

[0233] The third sending unit 530 is used to send indication information to the terminal device, where the indication information includes TPMI information. The TPMI information is used to determine the precoding method on the antenna port corresponding to the first SRS resource and the second SRS resource. The first SRS resource group includes the first SRS resource, and the second SRS resource group includes the second SRS resource.

[0234] In some embodiments, the first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets.

[0235] In some embodiments, the SRS resources within the first SRS resource group are the same as one or more of the following configurations of the SRS resources within the second SRS resource group: frequency domain resources, time slot configuration, orthogonal frequency division multiplexing OFDM symbol configuration, frequency domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb offset hopping configuration, and power control parameters.

[0236] In some embodiments, each SRS resource in the first SRS resource group corresponds to at least one SRS resource in the second SRS resource group.

[0237] In some embodiments, the first SRS resource group and the second SRS resource group include the same number of SRS resources, and the SRS resources in the first SRS resource group correspond one-to-one to the SRS resources in the second SRS resource group.

[0238] In some embodiments, the two corresponding SRS resources satisfy one or more of the following: occupying the same physical resources; using the same transmission beam; and using the same transmission power.

[0239] In some embodiments, the TPMI information is used to indicate a precoding matrix of three antenna ports, where the three antenna ports are composed of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS resource.

[0240] In some embodiments, the TPMI information includes a first TPMI and a second TPMI, the first TPMI is used to determine the precoding mode on the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding mode on the antenna port corresponding to the second SRS resource.

[0241] In some embodiments, the first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or the first TPMI is used to indicate a precoding matrix of 2 antenna ports.

[0242] In some embodiments, the first TPMI includes 2 bits of information, 2 bits of which are used to indicate whether the 2 antenna ports corresponding to the first SRS resource are used for data transmission, or the 2 bits of information are used to indicate one of the following information: the precoding matrix is The precoding matrix is The precoding matrix is 2 Antenna ports are not used for data transmission.

[0243] In some embodiments, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission.

[0244] In some embodiments, the first TPMI and the second TPMI are further used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource, respectively.

[0245] In some embodiments, the total number of transmission layers of the uplink data is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

[0246] In some embodiments, the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna port is not used for data transmission, or the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 at the same time.

[0247] In some embodiments, the network device is also used to: receive first information and second information sent by the terminal device; wherein the first information is used to indicate whether the two antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the one antenna port corresponding to the second SRS resource can support full-power transmission.

[0248] In some embodiments, the network device is further used to: send SRS resource indication SRI information to the terminal device; wherein the SRI information is used to determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group respectively.

[0249] In some embodiments, when the SRI information indicates an index n-1, the first SRS resource corresponds to the nth SRS resource in the first SRS resource group, and the second SRS resource corresponds to the nth SRS resource in the second SRS resource group.

[0250] In some embodiments, the SRI information includes a first SRI and a second SRI, the first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group.

[0251] In some embodiments, the network device is further used to: receive uplink data sent by the terminal device after being pre-coded using a precoding method.

[0252] In an optional embodiment, the second sending unit 510, the third receiving unit 520 or the third sending unit 530 may be a transceiver 630. The network device 500 may further include a processor 610 and a memory 620, as specifically shown in FIG6 .

[0253] Figure 6 is a schematic block diagram of a communication device according to an embodiment of the present application. The dashed lines in Figure 6 indicate that the unit or module is optional. The device 600 may be used to implement the method described in the above method embodiment. The device 600 may be a chip, a terminal device, or a network device.

[0254] The device 600 may include one or more processors 610. The processor 610 may support the device 600 to implement the method described in the above method embodiment. The processor 610 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0255] The apparatus 600 may further include one or more memories 620. The memories 620 store programs that can be executed by the processor 610, causing the processor 610 to perform the methods described in the above method embodiments. The memories 620 may be independent of the processor 610 or integrated into the processor 610.

[0256] The apparatus 600 may further include a transceiver 630. The processor 610 may communicate with other devices or chips via the transceiver 630. For example, the processor 610 may transmit and receive data with other devices or chips via the transceiver 630.

[0257] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0258] The present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in the present application, and the program causes a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0259] The embodiments of the present application also provide a computer program. The computer program can be applied to the terminal or network device provided in the embodiments of the present application, and the computer program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0260] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0261] In the embodiments of this application, the term "indication" may refer to a direct indication, an indirect indication, or an indication of an association. For example, "A indicates B" may refer to a direct indication of B, e.g., B can obtain information through A; it may refer to an indirect indication of B, e.g., A indicates C, e.g., B can obtain information through C; or it may refer to an association between A and B.

[0262] In the embodiment of the present application, "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B based solely on A, but B can also be determined based on A and / or other information.

[0263] In the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and indication, configuration and configuration, etc.

[0264] In the embodiments of the present application, "pre-definition" or "pre-configuration" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., a terminal device and a network device). The present application does not limit the specific implementation method. For example, pre-definition may refer to information defined in a protocol.

[0265] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communications field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0266] In the embodiments of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0267] In the embodiments of this application, the term "include" can refer to direct inclusion or indirect inclusion. Alternatively, the term "include" in the embodiments of this application can be replaced with "indicates" or "is used to determine." For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B."

[0268] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0269] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0270] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0271] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0272] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0273] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A wireless communication method, characterized in that, it includes: A terminal device receives configuration information sent by a network device, where the configuration information is used to configure a first sounding reference signal (SRS) resource group and a second SRS resource group. The first SRS resource group includes one or more SRS resources of 2 antenna ports, and the second SRS resource group includes one or more SRS resources of single antenna ports; The terminal device sends SRS on the first SRS resource group and the second SRS resource group; The terminal device receives indication information sent by the network device, where the indication information includes transmission precoding matrix indication (TPMI) information, and the TPMI information is used to determine the precoding method on the antenna ports corresponding to the first SRS resource and the second SRS resource. The first SRS resource group includes the first SRS resource, and the second SRS resource group includes the second SRS resource.

2. The method according to claim 1, characterized in that, The first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets.

3. The method according to claim 1 or 2, characterized in that, One or more of the following configurations of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same: frequency domain resources, time slot configuration, orthogonal frequency division multiplexing (OFDM) symbol configuration, frequency domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb-shaped offset hopping configuration, power control parameters.

4. The method according to any one of claims 1-3, characterized in that, Each SRS resource in the first SRS resource group corresponds to at least one SRS resource in the second SRS resource group.

5. The method according to claim 4, characterized in that, The first SRS resource group and the second SRS resource group include the same number of SRS resources, and the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group correspond one by one.

6. The method according to any one of claims 4 or 5, characterized in that, The corresponding two SRS resources satisfy one or more of the following: Occupy the same physical resources; Use the same transmission beam; Use the same transmission power.

7. The method according to any one of claims 1-6, characterized in that, The TPMI information is used to indicate a precoding matrix of a 3-antenna port, and the 3-antenna port is composed of 2 antenna ports corresponding to the first SRS resource and 1 antenna port corresponding to the second SRS resource.

8. The method according to claim 1, characterized in that, The TPMI information includes a first TPMI and a second TPMI. The first TPMI is used to determine the precoding method on the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding method on the antenna port corresponding to the second SRS resource.

9. The method according to claim 8, wherein, the first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or, the first TPMI is used to indicate the precoding matrix of a 2-antenna port.

10. The method according to claim 9, wherein, the first TPMI includes 2-bit information, and the 2 bits in the 2-bit information are respectively used to indicate whether the 2 antenna ports corresponding to the first SRS resource are used for data transmission, or the 2-bit information is used to indicate one of the following information: The precoding matrix is The precoding matrix is The precoding matrix is The 2-antenna port is not used for data transmission.

11. The method according to any one of claims 8-10, wherein, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission.

12. The method according to any one of claims 8-11, wherein, the first TPMI and the second TPMI are also respectively used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource.

13. The method according to claim 12, wherein, the total number of transmission layers of the uplink data is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

14. The method according to any one of claims 8-13, wherein, the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna ports are not used for data transmission, or the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 simultaneously.

15. The method according to any one of claims 1-14, wherein, the method further includes: the terminal device sends the first information and the second information to the network device; wherein, the first information is used to indicate whether the 2 antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the 1 antenna port corresponding to the second SRS resource can support full-power transmission.

16. The method according to any one of claims 1-15, wherein, the method further includes: the terminal device receives the SRS resource indication SRI information sent by the network device; wherein, the SRI information is used to respectively determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group.

17. The method according to claim 16, wherein, when the SRI information indicates index n-1, the first SRS resource corresponds to the nth SRS resource in the first SRS resource group, and the second SRS resource corresponds to the nth SRS resource in the second SRS resource group.

18. The method according to claim 16, wherein, The SRI information includes a first SRI and a second SRI. The first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group.

19. The method according to any one of claims 1-18, wherein, further comprising: the terminal device precodes uplink data according to the precoding method; the terminal device transmits the precoded data on the antenna ports corresponding to the first SRS resource and the second SRS resource.

20. The method according to claim 19, wherein, each transmission layer in the uplink data is mapped to different antenna ports among the antenna ports corresponding to the first SRS resource and the second SRS resource.

21. The method according to claim 20, wherein, the transmission layer in the uplink data is first mapped to the antenna port corresponding to the first SRS resource, and then mapped to the antenna port corresponding to the second SRS resource, or the transmission layer in the uplink data is first mapped to the antenna port corresponding to the second SRS resource, and then mapped to the antenna port corresponding to the first SRS resource.

22. A wireless communication method, wherein, comprising: a network device sends configuration information to a terminal device, the configuration information is used to configure a first sounding reference signal SRS resource group and a second SRS resource group, the first SRS resource group includes one or more SRS resources of 2 antenna ports, and the second SRS resource group includes one or more SRS resources of single antenna ports; the network device receives the SRS sent by the terminal device on the first SRS resource group and the second SRS resource group; the network device sends indication information to the terminal device, the indication information includes transmission precoding matrix indication TPMI information, the TPMI information is used to determine the precoding method on the antenna ports corresponding to the first SRS resource and the second SRS resource, the first SRS resource group includes the first SRS resource, and the second SRS resource group includes the second SRS resource.

23. The method according to claim 22, wherein, the first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets.

24. The method according to claim 22 or 23, wherein, one or more of the following configurations of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same: frequency domain resource, time slot configuration, orthogonal frequency division multiplexing OFDM symbol configuration, frequency domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb-shaped offset hopping configuration, power control parameter.

25. The method according to any one of claims 22-24, wherein, Each SRS resource in the first SRS resource group corresponds to at least one SRS resource in the second SRS resource group.

26. The method according to claim 25, wherein, the first SRS resource group and the second SRS resource group contain the same number of SRS resources, and the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are in one-to-one correspondence.

27. The method according to claim 25 or 26, wherein, the two corresponding SRS resources satisfy one or more of the following: occupy the same physical resources; use the same transmission beam; use the same transmission power.

28. The method according to any one of claims 22-27, wherein, the TPMI information is used to indicate the precoding matrix of a 3-antenna port, and the 3-antenna port is composed of 2 antenna ports corresponding to the first SRS resource and 1 antenna port corresponding to the second SRS resource.

29. The method according to claim 22, wherein, the TPMI information includes a first TPMI and a second TPMI. The first TPMI is used to determine the precoding method on the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding method on the antenna port corresponding to the second SRS resource.

30. The method according to claim 29, wherein, the first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or, the first TPMI is used to indicate the precoding matrix of a 2-antenna port.

31. The method according to claim 30, wherein, the first TPMI includes 2-bit information, and the 2 bits in the 2-bit information are respectively used to indicate whether the 2 antenna ports corresponding to the first SRS resource are used for data transmission, or the 2-bit information is used to indicate one of the following information: The precoding matrix is The precoding matrix is The precoding matrix is the 2-antenna port is not used for data transmission.

32. The method according to any one of claims 29-31, wherein, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission.

33. The method according to any one of claims 29-32, wherein, the first TPMI and the second TPMI are also respectively used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource.

34. The method according to claim 33, wherein, the total number of transmission layers of the uplink data is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

35. The method according to any one of claims 29-34, wherein, the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna ports are not used for data transmission, or the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 simultaneously.

36. The method according to any one of claims 29-35, wherein, the method further includes: the network device receives first information and second information sent by the terminal device; wherein, the first information is used to indicate whether the two antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the one antenna port corresponding to the second SRS resource can support full-power transmission.

37. The method according to any one of claims 29-36, wherein, the method further includes: the network device sends SRS resource indication SRI information to the terminal device; wherein, the SRI information is used to respectively determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group.

38. The method according to claim 37, wherein, when the SRI information indicates index n-1, the first SRS resource corresponds to the nth SRS resource in the first SRS resource group, and the second SRS resource corresponds to the nth SRS resource in the second SRS resource group.

39. The method according to claim 37, wherein, the SRI information includes a first SRI and a second SRI, the first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group.

40. The method according to any one of claims 29-39, wherein, further includes: the network device receives uplink data sent by the terminal device after precoding using the precoding method.

41. A terminal device, wherein, includes: a first receiving unit, configured to receive configuration information sent by a network device, the configuration information being used to configure a first sounding reference signal SRS resource group and a second SRS resource group, the first SRS resource group including one or more SRS resources of two antenna ports, and the second SRS resource group including one or more SRS resources of single antenna ports; a first sending unit, configured to send SRS on the first SRS resource group and the second SRS resource group; a second receiving unit, configured to receive indication information sent by the network device, the indication information including transmission precoding matrix indication TPMI information, the TPMI information being used to determine a precoding method on antenna ports corresponding to the first SRS resource and the second SRS resource, the first SRS resource group including the first SRS resource, and the second SRS resource group including the second SRS resource.

42. The terminal device according to claim 41, wherein, the first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets.

43. The terminal device according to claim 41 or 42, wherein, The SRS resources within the first SRS resource group are the same as one or more of the following configurations of the SRS resources within the second SRS resource group: frequency-domain resources, time-slot configuration, orthogonal frequency-division multiplexing (OFDM) symbol configuration, frequency-hopping configuration in the frequency domain, sequence-hopping configuration, cyclic-shift hopping configuration, comb-shaped offset hopping configuration, power control parameters.

44. The terminal device according to any one of claims 41-43, wherein, each SRS resource in the first SRS resource group corresponds to at least one SRS resource in the second SRS resource group.

45. The terminal device according to claim 44, wherein, the first SRS resource group and the second SRS resource group contain the same number of SRS resources, and the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group correspond one by one.

46. The terminal device according to any one of claims 44 or 45, wherein, the two corresponding SRS resources satisfy one or more of the following: occupying the same physical resources; using the same transmission beam; using the same transmission power.

47. The terminal device according to any one of claims 41-46, wherein, the TPMI information is used to indicate a precoding matrix for a three-antenna port, and the three-antenna port is composed of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS resource.

48. The terminal device according to claim 41, wherein, the TPMI information includes a first TPMI and a second TPMI. The first TPMI is used to determine the precoding method on the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding method on the antenna port corresponding to the second SRS resource.

49. The terminal device according to claim 48, wherein, the first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or, the first TPMI is used to indicate a precoding matrix for a two-antenna port.

50. The terminal device according to claim 49, wherein, the first TPMI includes 2-bit information, and the two bits in the 2-bit information are respectively used to indicate whether the two antenna ports corresponding to the first SRS resource are used for data transmission, or the 2-bit information is used to indicate one of the following information: The precoding matrix is The precoding matrix is The precoding matrix is the two-antenna port is not used for data transmission.

51. The terminal device according to any one of claims 48-50, wherein, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission.

52. The terminal device according to any one of claims 48-51, wherein, the first TPMI and the second TPMI are also respectively used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource.

53. The terminal device according to claim 52, wherein, The total number of transmission layers of the uplink data is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

54. The terminal device according to any one of claims 48-53, wherein, the first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna ports are not used for data transmission, or, the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 simultaneously.

55. The terminal device according to any one of claims 41-54, wherein, the terminal device is further configured to: send first information and second information to the network device; wherein, the first information is used to indicate whether the two antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the one antenna port corresponding to the second SRS resource can support full-power transmission.

56. The terminal device according to any one of claims 41-55, wherein, the terminal device is further configured to: receive the SRS resource indication SRI information sent by the network device; wherein, the SRI information is used to respectively determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group.

57. The terminal device according to claim 56, wherein, when the SRI information indicates index n-1, the first SRS resource corresponds to the nth SRS resource in the first SRS resource group, and the second SRS resource corresponds to the nth SRS resource in the second SRS resource group.

58. The terminal device according to claim 56, wherein, the SRI information includes a first SRI and a second SRI, the first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group.

59. The terminal device according to any one of claims 41-58, wherein, the terminal device is further configured to: perform precoding on the uplink data according to the precoding method; the terminal device transmits the precoded data on the antenna ports corresponding to the first SRS resource and the second SRS resource.

60. The terminal device according to claim 59, wherein, each transmission layer in the uplink data is mapped to different antenna ports among the antenna ports corresponding to the first SRS resource and the second SRS resource.

61. The terminal device according to claim 60, wherein, the transmission layers in the uplink data are first mapped to the antenna ports corresponding to the first SRS resource, and then mapped to the antenna ports corresponding to the second SRS resource, or, the transmission layers in the uplink data are first mapped to the antenna ports corresponding to the second SRS resource, and then mapped to the antenna ports corresponding to the first SRS resource.

62. A network device, wherein, comprising: A second transmitting unit, configured to transmit configuration information to a terminal device, where the configuration information is used to configure a first sounding reference signal (SRS) resource group and a second SRS resource group, the first SRS resource group includes SRS resources of one or more dual-antenna ports, and the second SRS resource group includes SRS resources of one or more single-antenna ports; A third receiving unit, configured to receive SRSs transmitted by the terminal device on the first SRS resource group and the second SRS resource group; A third transmitting unit, configured to transmit indication information to the terminal device, where the indication information includes transmission precoding matrix indication (TPMI) information, and the TPMI information is used to determine a precoding mode on antenna ports corresponding to a first SRS resource and a second SRS resource, the first SRS resource group includes the first SRS resource, and the second SRS resource group includes the second SRS resource.

63. The network device according to claim 62, wherein, the first SRS resource group and the second SRS resource group are two SRS resource groups in the same SRS resource set, or the first SRS resource group and the second SRS resource group are two different SRS resource sets.

64. The network device according to claim 62 or 63, wherein, one or more of the following configurations of the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are the same: frequency-domain resources, time-slot configuration, orthogonal frequency-division multiplexing (OFDM) symbol configuration, frequency-domain hopping configuration, sequence hopping configuration, cyclic shift hopping configuration, comb-shaped offset hopping configuration, power control parameters.

65. The network device according to any one of claims 62-64, wherein, each SRS resource in the first SRS resource group corresponds to at least one SRS resource in the second SRS resource group.

66. The network device according to claim 65, wherein, the first SRS resource group and the second SRS resource group include the same number of SRS resources, and the SRS resources in the first SRS resource group and the SRS resources in the second SRS resource group are in one-to-one correspondence.

67. The network device according to claim 65 or 66, wherein, the corresponding two SRS resources satisfy one or more of the following: occupying the same physical resources; using the same transmission beam; using the same transmission power.

68. The network device according to any one of claims 62-67, wherein, the TPMI information is used to indicate a precoding matrix of a three-antenna port, and the three-antenna port is composed of two antenna ports corresponding to the first SRS resource and one antenna port corresponding to the second SRS resource.

69. The network device according to claim 62, wherein, The TPMI information includes a first TPMI and a second TPMI. The first TPMI is used to determine the precoding method on the antenna port corresponding to the first SRS resource, and the second TPMI is used to determine the precoding method on the antenna port corresponding to the second SRS resource.

70. The network device according to claim 69, wherein, the first TPMI is used to indicate whether the antenna port corresponding to the first SRS resource is used for data transmission, and / or, the first TPMI is used to indicate the precoding matrix of a 2-antenna port.

71. The network device according to claim 70, wherein, the first TPMI includes 2-bit information, and the 2 bits in the 2-bit information are respectively used to indicate whether the 2 antenna ports corresponding to the first SRS resource are used for data transmission, or the 2-bit information is used to indicate one of the following information: The precoding matrix is The precoding matrix is The precoding matrix is The 2-antenna port is not used for data transmission.

72. The network device according to any one of claims 69-71, wherein, the second TPMI is used to indicate whether the antenna port corresponding to the second SRS resource is used for data transmission.

73. The network device according to any one of claims 69-72, wherein, the first TPMI and the second TPMI are also respectively used to indicate the number of transmission layers on the antenna ports corresponding to the first SRS resource and the second SRS resource.

74. The network device according to claim 73, wherein, The total number of transmission layers of the uplink data is equal to the sum of the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI.

75. The network device according to any one of claims 69-74, wherein, The first TPMI and the second TPMI cannot simultaneously indicate that the corresponding antenna ports are not used for data transmission, or the number of transmission layers indicated by the first TPMI and the number of transmission layers indicated by the second TPMI cannot be 0 simultaneously.

76. The network device according to any one of claims 69-75, wherein, The network device is further configured to: Receive the first information and the second information sent by the terminal device; wherein, the first information is used to indicate whether the 2 antenna ports corresponding to the first SRS resource can support full-power transmission, and the second information is used to indicate whether the 1 antenna port corresponding to the second SRS resource can support full-power transmission.

77. The network device according to any one of claims 69-76, wherein, The network device is further configured to: Send SRS resource indication SRI information to the terminal device; wherein, the SRI information is used to respectively determine the first SRS resource and the second SRS resource from the first SRS resource group and the second SRS resource group.

78. The network device according to claim 77, wherein, When the SRI information indicates index n-1, the first SRS resource corresponds to the nth SRS resource in the first SRS resource group, and the second SRS resource corresponds to the nth SRS resource in the second SRS resource group.

79. The network device according to claim 77, wherein, the SRI information includes a first SRI and a second SRI. The first SRI is used to determine the first SRS resource from the first SRS resource group, and the second SRI is used to determine the second SRS resource from the second SRS resource group.

80. The network device according to any one of claims 69-79, wherein, the network device is further configured to: receive the uplink data sent by the terminal device after precoding using the precoding method.

81. A terminal device, wherein, it includes a memory and a processor. The memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method according to any one of claims 1-21.

82. A network device, wherein, it includes a memory and a processor. The memory is used to store a program, and the processor is used to call the program in the memory so that the network device executes the method according to any one of claims 22-40.

83. A device, wherein, it includes a processor, which is used to call a program from a memory so that the device executes the method according to any one of claims 1-21.

84. A chip, wherein, it includes a processor, which is used to call a program from a memory so that the device installed with the chip executes the method according to any one of claims 1-21.

85. A computer-readable storage medium, wherein, a program is stored thereon, and the program causes a computer to execute the method according to any one of claims 1-21.

86. A computer program product, wherein, it includes a program, and the program causes a computer to execute the method according to any one of claims 1-21.

87. A computer program, wherein, the computer program causes a computer to execute the method according to any one of claims 1-21.

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