Sounding reference signal (SRS) transmission method, communication apparatus, and communication device

Abstract

The present application belongs to the field of communications. Disclosed are a sounding reference signal (SRS) transmission method, a communication apparatus, and a communication device. The method in the embodiments of the present application comprises: a terminal acquiring an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set comprises at least one downlink reference signal; on the basis of the downlink reference signal set associated with a target SRS to be sent, the terminal determining precoding information of the target SRS; and the terminal sending the target SRS by using the precoding information.

Description

Sounding Reference Signal (SRS) Transmission Method, Communication Device, and Communication Equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 29, 2024, with application number 202410230977.6 and invention name “Transmission method, communication device and communication equipment for sounding reference signal SRS”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a method, a communication apparatus, and a communication device for transmitting a sounding reference signal (SRS). Background Art

[0003] In related technologies, a sounding reference signal (SRS) can be associated with an associated channel state information reference signal (CSI-RS). The terminal can calculate the precoding information of the SRS based on the CSI-RS associated with the SRS, and then transmit the SRS based on the precoding information. The network-side equipment can perform uplink channel measurement based on the SRS and configure appropriate uplink transmission parameters for the terminal based on the measurement results to ensure the uplink transmission performance of the terminal.

[0004] In some scenarios, a terminal supports connecting to multiple Transmission Reception Points (TRPs), which can perform coherent joint transmission (CJT) and coherent joint reception (CJR) to serve the terminal. In this case, if the existing method for determining precoding information is used, the determined SRS precoding information will be inaccurate, which will in turn affect uplink transmission performance. Summary of the Invention

[0005] The embodiments of the present application provide a sounding reference signal (SRS) transmission method, a communication apparatus, and a communication device, which can improve the accuracy of calculated SRS precoding information and ensure uplink transmission performance.

[0006] In a first aspect, a method for transmitting a sounding reference signal (SRS) is provided, the method comprising:

[0007] The terminal obtains an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal;

[0008] The terminal determines, according to a downlink reference signal set associated with a target SRS to be sent, precoding information of the target SRS;

[0009] The terminal sends the target SRS using the precoding information.

[0010] In a second aspect, a method for transmitting a sounding reference signal (SRS) is provided, the method comprising:

[0011] The network-side device indicates to the terminal an association relationship between the SRS and the downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal;

[0012] The network-side device receives a target SRS sent by the terminal, wherein precoding information of the target SRS is determined according to a downlink reference signal set associated with the target SRS.

[0013] According to a third aspect, a communication device is provided, including:

[0014] a processing unit, configured to obtain an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; and determine precoding information of a target SRS to be transmitted based on the downlink reference signal set associated with the target SRS;

[0015] A communication unit is configured to send the target SRS using the precoding information.

[0016] In a fourth aspect, a communication device is provided, including:

[0017] a sending unit, configured to indicate an association relationship between an SRS and a downlink reference signal to a terminal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal;

[0018] The receiving unit is configured to receive a target SRS sent by the terminal, wherein precoding information of the target SRS is determined according to a downlink reference signal set associated with the target SRS.

[0019] In a fifth aspect, a communication device is provided, which terminal includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0020] In a sixth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0021] In the seventh aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0022] In an eighth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0023] In the ninth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the method described in the first aspect or the steps of the method described in the second aspect.

[0024] In an embodiment of the present application, an SRS can be associated with one or more downlink reference signals. The terminal can calculate the precoding information of the target SRS to be sent based on the downlink reference signal associated with the target SRS, thereby obtaining more accurate precoding information and sending the target SRS based on the precoding information. This is conducive to ensuring that the network side equipment performs accurate uplink channel measurement based on the target SRS, and then configures appropriate uplink transmission parameters to ensure uplink transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application.

[0026] FIG2 is a schematic diagram of a non-codebook based PUSCH transmission process.

[0027] FIG3 shows a schematic diagram of a flexible duplex mode.

[0028] FIG4 is a schematic diagram of a method for transmitting a sounding reference signal (SRS) provided in an embodiment of the present application.

[0029] FIG5 is a schematic diagram of a scenario applicable to an embodiment of the present application.

[0030] FIG6 is a schematic diagram of a mapping relationship between a subarray and a reference signal provided in an embodiment of the present application.

[0031] FIG7 is a schematic diagram of time resources associated with an SRS resource group configuration or a CSI-RS set provided in an embodiment of the present application.

[0032] FIG8 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0033] FIG9 is a schematic diagram of another communication device provided in an embodiment of the present application.

[0034] FIG10 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0035] FIG11 is a hardware structure diagram of a terminal provided in an embodiment of the present application.

[0036] FIG12 is a hardware structure diagram of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0038] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0039] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0040] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0041] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, vehicle-mounted controller, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application.

[0042] A terminal may also be called user equipment (UE), terminal device, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0043] The network-side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (RAN) device, a radio access network function, or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AP), or a wireless fidelity (WiFi) node. Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0044] To facilitate understanding of the embodiments of the present application, a non-codebook based physical uplink shared channel (PUSCH) transmission process is described.

[0045] PUSCH transmission modes include codebook and non-codebook. Non-codebook based UL transmission means that the terminal does not use the existing codebook for PUSCH transmission, but instead calculates the precoding information based on the associated Channel State Information Reference Signal (associated CSI-RS) to adjust PUSCH transmission.

[0046] Non-codebook PUSCH transmission is usually used when the uplink and downlink channels are reciprocal, such as in the Time Division Duplex (TDD) scenario. The general process includes the terminal calculating the downlink precoding codeword based on the downlink CSI-RS measurement results, and using the downlink precoding codeword for uplink SRS transmission based on the reciprocity of the uplink and downlink channels. The base station selects one or more SRS resources based on the received uplink precoded Sounding Reference Signal (precoded SRS) and notifies the terminal through the SRS Resource Indicator (SRI). The number of SRI resources is the rank of the uplink transmission. The terminal uses the corresponding precoding codeword for PUSCH transmission according to the instruction of the base station.

[0047] FIG2 shows a non-codebook based PUSCH transmission process.

[0048] Step 1: The UE reports UE capability information (UeCapabilityInformation), including, for example, the maximum number of layers supported (max layer).

[0049] Step 2: The base station configures an SRS resource set for the UE.

[0050] For example, the SRS resource set configuration is configured via an RRC reconfiguration message. When the SRS resource set usage is non-codebook-based UL transmission, the UE is configured with up to four SRS resources (depending on UE capabilities). The associated CSI-RS is configured in the SRS resource set at the Radio Resource Control (RRC) layer, allowing the UE to infer the UL channel from the DL channel and calculate the SRS precoder.

[0051] Step 3: Precoded SRS transmission.

[0052] Step 4: The base station selects appropriate SRS resources based on the SRS received in step 3. The rank is the number of SRS resources selected by the base station. The base station notifies the UE of specific uplink transmission parameters, such as SRI and Demodulation Reference Signal (DMRS) port, through Downlink Control Information (DCI).

[0053] Step 5: The UE transmits PUSCH according to the DCI.

[0054] The cell-free massive MIMO (Multiple-Input Multiple-Output, MIMO) system breaks the concept of cells in traditional massive MIMO systems. Instead of being deployed at the same macro base station, a large number of antennas are distributed over a wide area. UEs can also be distributed over this wide area. These antennas are called TRPs or APs, or they can be considered sub-arrays of a large antenna array on the network side. In theory, each UE can communicate with each TRP / sub-array. With the help of the fronthaul network and the Central Processing Unit (CPU), a large number of geographically dispersed TRPs can jointly serve a smaller number of UEs. The CPU uses channel statistics to perform joint detection. It is expected to be applied to next-generation indoor and hotspot coverage scenarios, such as smart factories, train stations, shopping malls, stadiums, subways, hospitals, community centers, or university campuses.

[0055] Traditional deployment of multiple TRP networks usually adopts TDD transmission mode and assumes that the uplink and downlink time slot configurations of each TRP in the network are the same. The network side can determine the uplink and downlink time slot configuration parameters based on the overall uplink and downlink traffic requirements in the entire Cell-free network.

[0056] In a full-duplex (FD) cell-free architecture, each TRP is configured with different uplink and downlink timeslots, allowing uplink and downlink data transmission within the same time and frequency resources. In this architecture, the uplink and downlink timeslot configurations of the TRP remain unchanged. By controlling the UE's uplink transmission or downlink reception with different TRPs, and by controlling the corresponding quasi-co-located (QCL) relationship for uplink transmission and the TCL relationship for downlink transmission, more flexible full-duplex timeslot configuration for the UE is achieved.

[0057] The advantage of using this method is that the terminal can meet the uplink and downlink transmission of any proportion and demand by connecting TRPs with different uplink and downlink time slot configurations; because the network side does not need to frequently adjust the uplink and downlink time slot configurations of each TRP, it can save network side resource overhead and implementation complexity, thereby reserving more network resources for more comprehensive interference measurement, joint optimization and transmission control.

[0058] The disadvantage is that there will be cross-link interference (CLI) between different TRPs, that is, the TRP in the downlink time slot will cause cross-link interference between TRPs to the TRP in the uplink time slot at the same time, and the UE in the uplink time slot will cause cross-link interference between UEs to the UE in the downlink time slot at the same time. However, considering that the CPU in the Cell-free network can control each TRP to achieve more accurate CLI measurement, and by optimizing the UE-TRP connection relationship and network-side beamforming, the impact of CLI is effectively reduced. In addition, for the interference problem between TRPs, such as the interference of TRP1 to TRP2, the base station determines the content of the TRP1 downlink signal. TRP2 receives the TRP1 downlink signal and can estimate the interference channel between TRP1 and TRP2 through the reference signals such as DMRS carried therein. Through baseband signal processing, the TRP1 downlink signal interference is eliminated from the TRP2 received signal.

[0059] In some scenarios, a flexible duplex mode is being considered: non-overlapping sub-band full duplex (SBFD) on the network side, meaning that uplink and downlink transmissions can be performed simultaneously at different frequency domain locations at the same time. To avoid interference between uplink and downlink, a certain guard band (Guard Band) can be reserved between the frequency domain locations (corresponding to the duplex subbands) corresponding to different transmission directions; and half-duplex on the terminal side, meaning that, consistent with TDD, only uplink or downlink transmissions can be performed at the same time, not both. It is understandable that in this duplex mode, the uplink and downlink transmissions on the network side at the same time can only be directed to different terminals, meaning the terminals are still half-duplex.

[0060] Figure 3 shows a schematic diagram of flexible duplexing. Within a portion of downlink symbols, the network semi-statically divides the frequency domain of a single carrier into three duplex subbands. Downlink subbands are located on either side of the carrier, while the center is an uplink subband. This reduces interference with adjacent carriers. In the third time slot, UE1 and UE2 transmit in uplink and receive in downlink, respectively, in half-duplex mode.

[0061] In some scenarios, sub-band full-duplex assumes that the uplink and downlink use different sub-bands of a carrier in the same time period; full-duplex cell-free networks assume that different TRPs operate on the same sub-band / frequency resources.

[0062] In related technologies, during non-codebook PUSCH transmission, the precoded SRS transmitted by the UE supports association with only a single CSI-RS, not with multiple CSI-RSs. Considering the situation when multiple sub-arrays of a large antenna array on the network side perform coherent joint reception (CJR), or when multiple TRPs in a cell-free network perform CJR reception, the UE's calculation of the SRS precoder based solely on a single CSI-RS may result in inaccurate calculated SRS precoders. In some cases, such as when the network-side device has a small number of ports for uplink reception, it is necessary to consider the configuration of associating the SRS with multiple CSI-RSs, and to support the association of multiple SRS groups with CSI-RS sets and multiple SRS transmission configurations. For example, the TRP clusters for UL joint reception in different slots can be different. Therefore, the UE needs to pre-calculate different SRS precoders based on the associations between multiple SRSs and CSI-RS sets, and feed back multiple precoded SRS groups for subsequent scheduling on the network side.

[0063] The following describes in detail the sounding reference signal (SRS) transmission method provided by the embodiments of the present application through some embodiments and application scenarios in conjunction with the accompanying drawings.

[0064] FIG4 is a schematic diagram of a method for transmitting a sounding reference signal (SRS) according to an embodiment of the present application. As shown in FIG4 , the method 400 includes at least part of the following:

[0065] S410: The terminal obtains an association relationship between an SRS and a downlink reference signal, where one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal;

[0066] S420, the terminal determines precoding information of the target SRS to be sent according to a downlink reference signal set associated with the target SRS;

[0067] S430: The terminal sends the target SRS using the precoding information.

[0068] The downlink reference signal in the embodiment of the present application may include, for example, CSI-RS, synchronization signal block (Synchronization Signal Block, SSB), phase tracking reference signal (Phase Tracking Reference Signal, PTRS) or demodulation reference signal (Demodulation Reference Signal, DMRS), and may also include other downlink reference signals, which are not limited in the present application. The following description will take the downlink reference signal as CSI-RS as an example, but the present application is not limited to this.

[0069] In an embodiment of the present application, a downlink reference signal and a TRP are associated. When a piece of information or a signal is associated with a downlink reference signal, it can also be understood that the information or signal is associated with the TRP associated with the downlink reference signal. Similarly, when a piece of information or a signal is associated with a TRP, it can also be understood that the information or signal is associated with the downlink reference signal associated with the TRP. For example, if an SRS is associated with a downlink reference signal, it can also be understood that the SRS is associated with the TRP associated with the downlink reference signal, or, if an SRS is associated with a TRP, it can be understood that the SRS is associated with the reference signal associated with the TRP.

[0070] In some embodiments, the association between the SRS and the downlink reference signal may be periodically, semi-statically, or statically configured. For example, the network device may configure a valid time or period corresponding to the association between the SRS and the downlink reference signal, during which the association between the SRS and the downlink reference signal remains unchanged. Optionally, the valid time or period may be predefined.

[0071] It should be understood that the present application does not limit the unit of the effective time or period. For example, the length of the effective time or period may be the length of at least one time unit. Optionally, the time unit may be a wireless frame, a subframe, a time slot, an orthogonal frequency-division multiplexing (OFDM) symbol, etc. The present application does not limit this.

[0072] In other embodiments, the association between the SRS and the downlink reference signal may also be dynamically configured. For example, the association between the SRS and the downlink reference signal may be dynamically configured by a network-side device through downlink signaling. Optionally, the downlink signaling may be a Radio Resource Control (RRC) message, a Media Access Control Control Element (MAC CE), or downlink control information (DCI).

[0073] In an embodiment of the present application, the association relationship between the downlink reference signal and the TRP may mean that the TRP is mapped to the downlink reference signal, or that the TRP supports sending the downlink reference signal.

[0074] In the embodiment of the present application, the association relationship between the SRS and the downlink reference signal may mean that precoding information of the SRS may be determined according to the downlink reference signal, for example, the precoding information of the SRS may be calculated using a measurement result of the downlink reference signal.

[0075] It should be understood that in the embodiment of the present application, the association relationship between the SRS and the downlink reference signal can be explicitly configured (or directly configured), or can be implicitly configured (or indirectly configured). For example, the network side device can directly indicate the association relationship between the SRS and the downlink reference signal, or can also indicate another association relationship, and the terminal can determine the association relationship between the SRS and the downlink reference signal based on the other association relationship.

[0076] It should be understood that in some implementations, the terminal obtaining the association relationship between the SRS and the downlink reference signal may include the terminal obtaining the association relationship between multiple SRSs and downlink reference signals, a first part of the multiple SRSs may be associated with a first downlink reference signal set, and a second part of the multiple SRSs is associated with a second downlink reference signal set, wherein the first downlink reference signal set includes one downlink reference signal, and the second downlink reference signal set includes multiple downlink reference signals.

[0077] For example, if the terminal obtains association relationships between multiple SRSs and downlink reference signals, some SRSs are associated with only one CSI-RS, while some SRSs are associated with multiple CSI-RSs.

[0078] In some implementations, the one downlink reference signal set including at least one downlink reference signal includes:

[0079] The one downlink reference signal set includes multiple downlink reference signals; or,

[0080] In a case where the terminal obtains an association relationship between multiple SRSs and downlink reference signals, a first part of the multiple SRSs is associated with a first downlink reference signal set, and a second part of the multiple SRSs is associated with a second downlink reference signal set, wherein the first downlink reference signal set includes one downlink reference signal, and the second downlink reference signal set includes multiple downlink reference signals.

[0081] In some implementations, the terminal may obtain the association relationship between the SRS and the downlink reference signal by:

[0082] The terminal acquires a first mapping relationship, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal;

[0083] An association relationship between the SRS and a downlink reference signal is determined according to the first mapping relationship.

[0084] In some embodiments, the terminal acquiring the first mapping relationship may include:

[0085] The terminal receives a first mapping relationship from a network-side device. For example, the network-side device indicates the first mapping relationship via downlink signaling. Optionally, the downlink signaling may include but is not limited to at least one of the following: an RRC message, a MAC CE, or a DCI.

[0086] In a specific embodiment, the first mapping relationship may be included in a Transmission Configuration Indicator (TCI) status indication. For example, the first mapping relationship may be included as part of the TCI status.

[0087] In other embodiments, the first mapping relationship may also be predefined.

[0088] In some embodiments, the terminal determines, according to the first mapping relationship, an association relationship between the SRS and a downlink reference signal, including:

[0089] The downlink reference signal corresponding to the port to which the SRS is mapped is determined as the downlink reference signal associated with the SRS.

[0090] In some other implementations, the terminal may obtain the association relationship between the SRS and the downlink reference signal by:

[0091] The terminal receives first configuration information from a network-side device, where the first configuration information is used to indicate K SRS resource group (SRS-ResourceSet) configurations, wherein an SRS in each SRS resource group configuration is associated with a downlink reference signal set, and K is a positive integer.

[0092] That is, the network-side device can configure the association relationship between the SRS and the downlink reference signal through the SRS resource group configuration.

[0093] For example, the SRS resource group configuration may include an associated downlink reference signal indication, such as an associated CSI-RS (associated CSI-RS) indication, for indicating a downlink reference signal set associated with the SRS in the SRS resource group configuration, wherein the downlink reference signal set may include one or more downlink reference signals. Exemplarily, the associated downlink reference signal indication in the kth SRS resource group configuration in the K SRS resource group configurations includes N k downlink reference signals, such as N k CSI-RS.

[0094] The following describes the configuration method of the first configuration information in conjunction with specific embodiments.

[0095] In some embodiments, the first configuration information may be periodically configured or semi-statically configured.

[0096] In some embodiments, the method 400 further includes:

[0097] The terminal receives first indication information from the network device, where the first indication information is used to indicate a validity period or period of the first configuration information. Specifically, the validity period or period of the K SRS resource group configurations. During the validity period or period of the first configuration information, the first configuration information remains unchanged. For example, for periodic uplink channel measurement, the network device may instruct the terminal to use the same first configuration information during the validity period or period, and to update the first configuration information after the validity period or period.

[0098] Optionally, the first indication information may be sent via an RRC message.

[0099] Optionally, the first indication information is included in the first configuration information. That is, when the network side device indicates the configuration of the K SRS resource groups, it also configures the valid time or period of the configuration of the K SRS resource groups.

[0100] In some embodiments, when the valid time or period of the first configuration information expires (in this case, the first configuration information can be considered invalid), the terminal sends a first message to the network side device to request to update the first configuration information. In response to the first message, the network side device sends a second message to the terminal, and the second message includes the updated first configuration information.

[0101] Optionally, the first message may include the uplink and downlink transmission requirements of the terminal, that is, the terminal may use the uplink and downlink transmission requirement request message to request the network side device to update the first configuration information.

[0102] Optionally, the validity period or period of the updated first configuration information may be carried in the second message. That is, when the network side device configures the first configuration information for the terminal, it also configures the validity period or period of the first configuration information.

[0103] In other embodiments, the first configuration information may be dynamically configured.

[0104] In some embodiments, the method 400 further includes:

[0105] The terminal receives first downlink signaling from the network device side device, where the first downlink signaling is used to indicate updated first configuration information;

[0106] The terminal updates the first configuration information according to the first downlink signaling.

[0107] Optionally, the first downlink signaling may be DCI, MAC CE, RRC message, etc.

[0108] In some embodiments, each SRS resource group configuration is used for transmission of the SRS in the SRS resource group configuration.

[0109] For example, the SRS resource group configuration is used to configure SRS resources for SRS transmission. The SRSs in the same SRS resource group configuration constitute an SRS group. An SRS group includes one or more SRSs. The SRSs in an SRS group are transmitted using the SRS resources configured in the same SRS resource group configuration.

[0110] It should be understood that in an embodiment of the present application, the SRS in the SRS resource group configuration is associated with a downlink reference signal set, which can be understood as a group of SRSs in the SRS resource group configuration are all associated with the downlink reference signal set, or, it can also be understood as the SRS resource group configuration and the downlink reference signal set have an association relationship, that is, the K SRS resource group configurations are associated with K downlink reference signal sets, wherein each SRS resource group configuration is associated with a downlink reference signal set.

[0111] In some embodiments, each of the K SRS resource group configurations corresponds to an index information (or SRS group index, SRS resource group configuration index), which can be used to indicate the SRS resource group configuration, or the downlink reference signal set associated with the SRS resource group configuration.

[0112] In some embodiments of the present application, the method 400 further includes:

[0113] The terminal receives second configuration information from the network side device, and the second configuration information is used to configure the target number M of SRS groups sent by the terminal (recorded as method one), or the target SRS group index set (recorded as method two), wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration and / or a downlink reference signal set.

[0114] In some embodiments, when the second configuration information indicates a target SRS group index set, it can be considered that the network side device triggers the SRS resource group configuration associated with the target SRS group index set, or triggers the transmission of the SRS in the SRS resource group configuration.

[0115] Optionally, the second configuration information may also indicate an SRS resource index in the triggered SRS resource group configuration.

[0116] That is, the network side device may trigger the entire SRS resource group configuration (in this case, it can be considered that all SRS resources in the SRS resource group configuration are triggered), or may also trigger part of the SRS resources in the SRS resource group configuration.

[0117] The following describes a configuration method of the second configuration information in conjunction with specific embodiments.

[0118] In some embodiments of the present application, the second configuration information may be periodically configured or semi-statically configured.

[0119] In some embodiments, the method 400 further includes:

[0120] The terminal receives second indication information from the network device side device, where the second indication information is used to indicate a valid period or period of the second configuration information, that is, a valid period or period of the target group number M or the target SRS group index set. During the valid period or period of the second configuration information, the second configuration information remains unchanged.

[0121] Optionally, the second indication information may be sent via an RRC message.

[0122] Optionally, the second indication information is included in the second configuration information. That is, when the network side device indicates the second configuration information, it also configures the validity period or period of the second configuration information.

[0123] In some embodiments, when the valid time or period of the second configuration information expires (in this case, the second configuration information can be considered invalid), the terminal sends a third message to the network side device to request to update the second configuration information. In response to the second message, the network side device sends a fourth message to the terminal, and the fourth message includes the updated second configuration information.

[0124] Optionally, the fourth message may include the uplink and downlink transmission requirements of the terminal, that is, the terminal may use the uplink and downlink transmission requirement request message to request the network side device to update the second configuration information.

[0125] Optionally, the validity period or period of the updated second configuration information may be carried in the fourth message. That is, when the network side device configures the second configuration information for the terminal, it also configures the validity period or period of the second configuration information.

[0126] In some embodiments of the present application, the second configuration information may be dynamically configured.

[0127] In some embodiments, the method 400 further includes:

[0128] The terminal receives second downlink signaling from the network device side device, where the second downlink signaling is used to indicate updated second configuration information;

[0129] The terminal updates the second configuration information according to the second downlink signaling.

[0130] Optionally, the second downlink signaling may be DCI, MAC CE, RRC message, etc.

[0131] In some embodiments, when the second configuration information is used to configure the target number of SRS groups sent by the terminal to be M, the target SRS may include M groups of SRS, and the M groups of SRS are sent using SRS resources in M ​​SRS resource group configurations. The precoding information of the target SRS is determined based on M downlink reference signal sets, wherein the M downlink reference signal sets are downlink reference signal sets associated with the M SRS resource group configurations.

[0132] For example, the terminal can select M SRS resource group configurations (for example, the first M, or the last M, etc.) from K SRS resource group configurations according to predefined rules as the SRS resource group configurations associated with the target SRS, and then determine the precoding information of the target SRS based on the downlink reference signal set associated with the M SRS resource group configurations, and / or send the target SRS based on the SRS resources in the M SRS resource group configurations.

[0133] For example, the terminal can select M downlink reference signal sets from K downlink reference signal sets according to predefined rules as downlink reference signal sets associated with the target SRS, determine the precoding information of the target SRS based on the M downlink reference signal sets, and then send the target SRS based on the precoding information. It can also use the SRS resources in the M SRS resource group configurations associated with the M downlink reference signal sets to send the target SRS.

[0134] Exemplarily, the terminal may select M downlink reference signal sets from the K downlink reference signal sets based on reception performance of the K downlink reference signal sets associated with the K SRS resource group configurations, for example, perform joint measurement on each of the K downlink reference signal sets to determine a joint measurement result for each downlink reference signal set, and determine M downlink reference signal sets based on the joint measurement results of the K downlink reference signal sets. For example, the M downlink reference signal sets are the M downlink reference signal sets with the best joint measurement results.

[0135] Optionally, the joint measurement result may include but is not limited to one of the following indications:

[0136] Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Received Signal Strength Indication (RSSI).

[0137] In other embodiments, when the second configuration information is used to configure the target SRS group index set, the target SRS group index set may include M SRS group indexes, used to indicate M SRS resource group configurations or M downlink reference signal sets, then the target SRS may include M groups of SRS in the M SRS resource group configurations, or, include M groups of SRS associated with the M downlink reference signal sets, the target SRS may be sent based on the SRS resources in the M SRS resource group configurations, and the precoding information of the target SRS may be determined based on the M downlink reference signal sets.

[0138] For the aforementioned method 2, if the network-side device explicitly indicates the target SRS group index set, the terminal can determine the M SRS resource group configurations indicated by the target SRS group index set as the SRS resource group configuration associated with the target SRS, and further can send the target SRS based on the SRS resources in the M SRS resource group configurations, for example, according to the SRS resources in each SRS resource group configuration in the M SRS resource group configurations, send a group of SRS in the SRS resource group configuration. And / or, the terminal can determine the M downlink reference signal sets indicated by the target SRS group index set as the downlink reference signal sets associated with the target SRS, and further can determine the precoding information of the target SRS based on the M downlink reference signal sets, and then use the precoding information to send the target SRS.

[0139] For Method 1, the network device does not indicate the SRS resource group configuration or downlink reference signal set associated with the target SRS. In this case, the terminal needs to determine the SRS resource group configuration associated with the target SRS to determine the SRS resources used to transmit the target SRS, and / or determine the downlink reference signal set associated with the target SRS to determine the precoding information of the target SRS.

[0140] In the following, the method for determining the SRS resource group configuration or the downlink reference signal set associated with the target SRS is described in conjunction with specific embodiments.

[0141] In some embodiments, the terminal may determine the downlink reference signal set associated with the target SRS or the SRS resource group configuration associated with the target SRS according to the first information.

[0142] For example, when the second configuration information is not sent, or when the second configuration information is sent but only the target group number M is indicated, the terminal can determine the downlink reference signal set associated with the target SRS or the SRS resource group configuration associated with the target SRS based on the first information.

[0143] In some embodiments, the first information includes at least one of the following:

[0144] downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission;

[0145] The association between the subarray and the downlink reference signal;

[0146] The uplink and downlink timeslot configuration (or, the uplink and downlink timeslot format) of at least one transmit / receive point (TRP);

[0147] The uplink and downlink time slot configuration associated with the downlink reference signal (or, the uplink and downlink time slot format);

[0148] Restriction information of downlink reference signals;

[0149] TRP restriction information;

[0150] Radio channel properties of at least one downlink reference signal.

[0151] In some embodiments, the first information may be indicated by a network-side device or obtained by terminal measurement. For example, a radio channel attribute of a downlink reference signal may be obtained by terminal measurement.

[0152] In some embodiments, the downlink reference signal restriction information includes at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal. The downlink reference signal set associated with the target SRS must include mandatory downlink reference signals and exclude unavailable downlink reference signals. Optionally, it may also include optional downlink reference signals.

[0153] In some embodiments, the TRP restriction information includes at least one of a mandatory TRP, an optional TRP, and an unavailable TRP. The target SRS-associated downlink reference signal set must include downlink reference signals associated with the mandatory TRP and exclude downlink reference signals associated with the unavailable TRP. Optionally, it may also include downlink reference signals associated with the optional TRP.

[0154] In some embodiments, the wireless channel attribute includes at least one of the following:

[0155] Doppler spread, Doppler shift, average delay, delay spread, average gain, spatial receiver parameters.

[0156] In some embodiments, the average gain of the at least one downlink reference signal represents an average value of the channel gains of the at least one downlink reference signal.

[0157] In some embodiments, the grouping information of the downlink reference signal may be indicated by a network-side device, wherein a group may include one or more downlink reference signals.

[0158] In some embodiments, the association between a subarray and a downlink reference signal may be indicated by a network-side device. A subarray may be associated with one or more downlink reference signals. When a subarray is associated with multiple downlink reference signals, the multiple downlink reference signals may correspond to different beam directions.

[0159] In some embodiments, since the downlink reference signal and the TRP are associated, the grouping of the downlink reference signal can be considered as a grouping of the TRP, and the TRP in one group supports joint transmission.

[0160] In the following, a method for determining the SRS resource group configuration or the downlink reference signal set associated with the target SRS is described in conjunction with the specific information in the first information.

[0161] Embodiment 1: The first information includes grouping information of a downlink reference signal / TRP.

[0162] In this case, the terminal may select one or more downlink reference signals in each group in at least one group according to the grouping information of the downlink reference signal / TRP to form a downlink reference signal set associated with the target SRS.

[0163] In some specific embodiments, determining, based on the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes:

[0164] measuring the downlink reference signal in at least one group according to the grouping information of the downlink reference signal, and determining the target downlink reference signal in each group according to the measurement result of the downlink reference signal in each group;

[0165] The downlink reference signal set associated with the target SRS includes the target downlink signal in each group, or the SRS resource group configuration associated with the target SRS is determined based on the downlink reference signal set associated with the target SRS. For example, the SRS resource group configuration associated with the downlink reference signal set associated with the target SRS is determined as the SRS resource group configuration associated with the target SRS.

[0166] In some embodiments, the grouping of the downlink reference signal / TRP can be determined according to the uplink and downlink time slot configuration associated with the downlink reference signal / TRP.

[0167] Taking the scenario in Figure 5 as an example, the terminal is connected to TRP1, TRP2, and TRP3. The downlink reference signal set supported by the network side device is {CSI-RS#1, CSI-RS#2, CSI-RS#3}. The TRP set associated with this downlink reference signal set is {TRP1, TRP2, TRP3}, where CSI-RS#1 is associated with TRP1, CSI-RS#2 is associated with TRP2, and CSI-RS#3 is associated with TRP3. The uplink and downlink time slot format of TRP1 is uplink and downlink time slot format #1, that is, DDDSU, or in other words, CSI-RS#1 is associated with (TRP1's) uplink and downlink time slot format #1, i.e., DDDSU; the uplink and downlink time slot format of TRP2 is uplink and downlink time slot format #2, i.e., DSUUU, or in other words, CSI-RS#2 is associated with (TRP2's) uplink and downlink time slot format #2, i.e., DSUUU; the uplink and downlink time slot format of TRP3 is uplink and downlink time slot format #3, i.e., DDSUU, or in other words, CSI-RS#3 is associated with (TRP3's) uplink and downlink time slot format #3, i.e., DDSUU, and the uplink and downlink time slots of the terminal are configured as uplink and downlink time slot format #4, i.e., DDDUU.

[0168] According to the above-mentioned uplink and downlink time slot configuration, it can be determined that in the first uplink time period (slot4), the TRP groups supporting joint transmission include {TRP2, TRP3}, which are associated with the first CSI-RS group {CSI-RS#1, CSI-RS#3}; in the second uplink time period (slot5), the TRP groups supporting joint transmission include {TRP1, TRP2, TRP3}, which are associated with the second CSI-RS group {CSI-RS#1, CSI-RS#2, CSI-RS#3}.

[0169] When determining the downlink reference signal set associated with the target SRS, the terminal may measure each CSI-RS in the first CSI-RS group, select the target CSI-RS in the first CSI-RS group, such as the two CSI-RSs with the highest signal quality, measure each CSI-RS in the second CSI-RS group, and select the target CSI-RS in the second CSI-RS group, such as the one CSI-RS with the highest signal quality. The target CSI-RSs selected in each CSI-RS group are formed into a first CSI-RS set, and the first CSI-RS set is used as the CSI-RS set associated with the target SRS set. If the first CSI-RS set is associated with the first SRS resource group configuration among K SRS resource group configurations, the first SRS resource group configuration is determined as the SRS resource group configuration associated with the target SRS.

[0170] Embodiment 2: The first information includes an association relationship between a subarray and a downlink reference signal.

[0171] In this case, the terminal may select a target subarray from at least one subarray based on the association between the subarray and the downlink reference signal, and determine a downlink reference signal set associated with the target SRS based on the downlink reference signal associated with the target subarray.

[0172] In some specific embodiments, determining, based on the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes:

[0173] measuring at least one subarray, and determining a target subarray in the at least one subarray according to the measurement result of the at least one subarray;

[0174] The target SRS-associated downlink reference signal set includes the target subarray-associated downlink reference signal, or the target SRS-associated SRS resource group configuration is determined according to the target SRS-associated downlink reference signal set.

[0175] In some embodiments, a large antenna array of a network-side device includes multiple subarrays, each subarray corresponding to one or more downlink reference signals. The terminal can measure the multiple subarrays and determine a target subarray based on the measurement results of the multiple subarrays, where the target subarray can include one or more subarrays. For example, the target subarray is determined based on the measurement results of the multiple subarrays and a first threshold. Specifically, for example, a subarray whose measurement result is greater than or equal to the first threshold is determined to be the target subarray. Optionally, the first threshold can be an RSRP threshold, an RSRQ threshold, an SINR threshold, or an RSSI threshold. Furthermore, a downlink reference signal set associated with a target SRS can be determined based on the downlink reference signal associated with the target subarray. For example, the downlink reference signal set associated with the target SRS can be determined to include the downlink reference signal associated with the target subarray. Alternatively, an SRS resource group configuration associated with the target SRS can be determined based on the downlink reference signal set associated with the target SRS. For example, the SRS resource group configuration associated with the downlink reference signal set associated with the target SRS can be determined as the SRS resource group configuration associated with the target SRS.

[0176] As shown in Figure 6, the large antenna array of the network-side device includes four sub-arrays {#1, #2, #3, #4}, corresponding to {CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS#4}. Due to obstruction by obstacles, the channel quality from sub-array #1 to the terminal is poor (for example, the measurement result corresponding to CSI-RS#1 is poor). The terminal can select the sub-array {#2, #3, #4} with better channel quality, and further determine that the CSI-RS set associated with the target SRS to be sent includes: {CSI-RS#2, CSI-RS#3, CSI-RS#4}.

[0177] Exemplarily, the association relationship between the subarray / CSI-RS group and the CSI-RS may be as shown in Table 1:

[0178] Table 1

[0179] In some embodiments, the terminal may select one or more CSI-RSs from the CSI-RSs associated with each CSI-RS group or subarray (for example, select one or more with the best signal quality), and form a first CSI-RS set with the target CSI-RSs selected from the CSI-RSs associated with all CSI-RS groups or subarrays, and use the first CSI-RS set as the CSI-RS set associated with the target SRS set. For example, if CSI-RS #1 is selected from the CSI-RSs associated with subarray #1 or CSI-RS group #1, and CSI-RS #2 is selected from the CSI-RSs associated with subarray #2 or CSI-RS group #2, If CSI-RS#3 is selected, CSI-RS#5 is selected from the CSI-RS associated with subarray#3 or CSI-RS group#3, and CSI-RS#8 is selected from the CSI-RS associated with subarray#4 or CSI-RS group#4, then it can be determined that the first CSI-RS set includes {CSI-RS#1, CSI-RS#3, CSI-RS#5, CSI-RS#8}. Alternatively, the SRS resource group configuration associated with the first CSI-RS set can be determined based on the first configuration information, and the SRS resource group configuration associated with the first CSI-RS set can be determined as the SRS resource group configuration associated with the target SRS. Furthermore, precoding information of the target SRS can be determined based on the first CSI-RS set, and / or the SRS resources in the SRS resource group configuration associated with the target SRS can be used to transmit the target SRS.

[0180] In the above embodiment, the target sub-array may be selected by the terminal. This approach simplifies the implementation of the terminal and helps reduce the signaling overhead of the network-side device.

[0181] In other embodiments, the network device may also indicate the target subarray to the terminal, or the terminal may not select a subarray, but rather determine all subarrays as target subarrays, leaving the network device to select the subarray. For example, the terminal transmits the SRS associated with the downlink reference signals associated with all subarrays. When the network device schedules the terminal, the network device indicates the selected SRS resource group configuration or downlink reference signal set to the terminal. This approach allows the terminal to transmit SRSs with different transmit powers using different SRS resource group configurations. Having the network device select the target subarray can reduce interference between different users during MU scheduling.

[0182] Embodiment 3: The first information includes at least one TRP / downlink reference signal associated uplink and downlink time slot configuration.

[0183] It should be noted that the uplink and downlink time slot configuration (or uplink and downlink time slot format) in the embodiments of the present application can be used to configure the transmission direction of a terminal or TRP over multiple time units, or in other words, to configure the time length of a terminal or TRP in at least one transmission direction.

[0184] For example, the transmission direction may include at least one of the following:

[0185] Uplink (UL, abbreviated as U) transmission, downlink (DL, abbreviated as D) transmission, flexible (Flexible, abbreviated as F) transmission, or special (Special, abbreviated as S) transmission, duplex transmission.

[0186] The special transmission is a special transmission including a protection interval, and the time unit corresponding to the special transmission may refer to a special time unit including a protection interval. For the network side device, the special transmission may be considered as a flexible transmission.

[0187] In some embodiments, when a time period is configured for uplink transmission, the time period can be considered as an uplink transmission time period; when a time period is configured for downlink transmission, the time period can be considered as a downlink transmission time period; when a time period is configured for flexible transmission, the time period can be considered as a flexible transmission time period; when a time period is configured for duplex transmission, the time period can be considered as a duplex transmission time period, wherein frequency domain resources for downlink transmission (e.g., downlink subband) and frequency domain resources for uplink transmission (e.g., uplink subband) are simultaneously configured in the duplex transmission time period, and the terminal can perform uplink transmission and downlink transmission respectively on the corresponding frequency domain resources.

[0188] In some embodiments, the time unit may be expressed in units of time lengths such as radio frames, subframes, time slots, and OFDM symbols.

[0189] The uplink and downlink time slot configuration in the embodiment of the present application may also be referred to as a TDD time slot format. For example, in the NR system, the uplink and downlink time slot configuration is configured by the parameter TDD-UL-DL-configcommon.

[0190] In some specific embodiments, determining, based on the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes:

[0191] Determining, according to the uplink and downlink timeslot configuration of the at least one TRP, a target TRP that supports uplink transmission within a target time period of the terminal, wherein the target time period of the terminal is a time period in which the terminal supports uplink transmission;

[0192] The target SRS-associated downlink reference signal set includes the target TRP-associated downlink reference signal, or the target SRS-associated SRS resource group configuration is determined based on the target SRS-associated downlink reference signal set.

[0193] In some embodiments, the target time period of the terminal can be the uplink transmission time period of the terminal, or the flexible transmission time period, or the duplex transmission time period of the terminal. For example, when the terminal has full-duplex capability (such as SBFD capability), the network-side device can configure the duplex transmission time period for the terminal. Optionally, the target time period can be expressed in time units such as radio frames, subframes, time slots, orthogonal frequency-division multiplexing (OFDM) symbols, and this application does not limit this.

[0194] In some scenarios, the terminal supports connection with at least two TRPs, and the at least two TRPs may correspond to different uplink and downlink time slot configurations. In this case, the terminal can determine the target TRP that supports uplink transmission within the target time period of the terminal based on the uplink and downlink time slot configurations of the at least two TRPs, and then determine the reference signal set or SRS resource group configuration associated with the target SRS based on the target TRP. For example, it is determined that the downlink reference signal set associated with the target TRP includes the downlink reference signal associated with the target TRP, or the SRS resource group configuration associated with the target SRS is determined based on the downlink reference signal set associated with the target TRP. For example, the SRS resource group configuration associated with the downlink reference signal set is determined as the SRS resource group configuration associated with the target SRS.

[0195] In some embodiments, the network side device can indicate a second mapping relationship to the terminal, which second mapping relationship includes a mapping relationship between at least one TRP / downlink reference signal and uplink and downlink time slot configuration (or uplink and downlink time slot format). Through this second mapping relationship, the terminal can obtain the uplink and downlink time slot configuration associated with at least one TRP / downlink reference signal.

[0196] In some embodiments, the terminal determines at least one set of downlink reference signal sets associated with SRS of the terminal based on the uplink and downlink time slot configuration associated with the at least one TRP / downlink reference signal, wherein each set of SRS corresponds to a target time period of the terminal. For example, the terminal may determine the TRP configured for uplink transmission or flexible transmission within the target time period as the target TRP, or determine the downlink reference signal associated with the target TRP as a set of downlink reference signal sets associated with SRS sent within the target time period, so that the precoding information of a set of SRS sent within the target time period can be calculated based on the downlink reference signal set. Alternatively, the SRS resource group configuration associated with a set of SRS sent within the target time period may also be determined based on the downlink reference signal set, for example, the SRS resource group configuration associated with the downlink reference signal set may be determined as the SRS resource group configuration associated with a set of SRS sent within the target time period, so that the group of SRS may be sent based on the SRS resources in the SRS resource group configuration.

[0197] In some cases, if the terminal is configured for flexible transmission within a first time period, whether the first time period supports uplink transmission can be determined based on the uplink and downlink time slot configuration of the TRP to which the terminal is connected.

[0198] For example, if all TRPs connected to the terminal are configured as one of downlink transmission and flexible transmission, the first time period can be considered as the uplink transmission time period of the terminal, that is, the first time period is the target time period of the terminal, and the terminal can determine the target TRP that supports uplink transmission within the target time period, and then determine the downlink reference signal set or SRS resource group configuration associated with the target SRS based on the target TRP.

[0199] For another example, if there is a TRP in the TRP to which the terminal is connected that is configured for downlink transmission, it can be determined that the first time period is the downlink transmission time period of the terminal, that is, the first time period is not the target time period of the terminal.

[0200] In some embodiments, when the terminal has full-duplex capability (e.g., SBFD capability), the terminal can determine the downlink reference signal set or SRS resource group configuration associated with the target SRS transmitted within the frequency domain resources (e.g., subband) for uplink transmission based on the uplink and downlink time slot configuration of at least one TRP and the uplink and downlink time slot configuration of the terminal, wherein the frequency domain resources for uplink transmission can be located within the uplink transmission time period of the terminal, or within the flexible transmission time period, or within the duplex transmission time period, and further, the precoding information of the target SRS can be determined based on the downlink reference signal set, and the target SRS can be sent on the time resources and frequency domain resources configured by the network side device.

[0201] For example, assume that a terminal is connected to two TRPs and supports SBFD. The downlink transmission time of Band Width Part (BWP) 1 of TRP1 overlaps with the uplink transmission time of BWP2 of TRP2. During the overlapping period, the terminal receives downlink signals from TRP1 on BWP1 and sends uplink signals to TRP2 on BWP2. The terminal also transmits the target SRS on BWP2 based on the CSI-RS transmitted by TRP2.

[0202] Combined with the scenario shown in Figure 5, for example, in the first uplink time period (slot4), the target TRP supporting uplink transmission includes {TRP2, TRP3}, and the associated CSI-RS set includes {CSI-RS#2, CSI-RS#3}. Then the terminal can determine that a group of SRSs sent in the first uplink time period (denoted as SRS group #1) is associated with the CSI-RS set {CSI-RS#2, CSI-RS#3}. The terminal can determine that a group of SRSs sent in the first uplink time period is associated with the CSI-RS set {CSI-RS#2, CSI-RS#3}. I-RS#3} determines the precoding information of SRS group #1, or the terminal can determine the SRS resource group configuration associated with SRS group #1 based on the CSI-RS set {CSI-RS#2, CSI-RS#3}, for example, determines the SRS resource group configuration associated with the CSI-RS set {CSI-RS#2, CSI-RS#3} (for example, SRS resource group configuration #1) as the SRS resource group configuration associated with SRS group #1, and uses the SRS resources in the SRS resource group configuration #1 to send SRS group #1.

[0203] In the second uplink time period (slot5), the target TRPs supporting uplink transmission include {TRP1, TRP2, TRP3}, and the associated CSI-RS set includes {CSI-RS#1, CSI-RS#2, CSI-RS#3}. The terminal can then determine that a group of SRSs sent in the second uplink time period (denoted as SRS group #2) is associated with the CSI-RS set {CSI-RS#1, CSI-RS#2, CSI-RS#3}, and the terminal can determine the precoding information of SRS group #2 based on the CSI-RS set {CSI-RS#1, CSI-RS#2, CSI-RS#3}, or the terminal can determine the SRS resource group configuration associated with SRS group #2 based on the CSI-RS set {CSI-RS#1, CSI-RS#2, CSI-RS#3}, for example, determine the SRS resource group configuration associated with the CSI-RS set {CSI-RS#1, CSI-RS#2, CSI-RS#3} (for example, SRS resource group configuration #2) as the SRS resource group configuration associated with SRS group #2, and use the SRS resources in the SRS resource group configuration #2 to send SRS group #2.

[0204] Embodiment 4: The first information includes a radio channel attribute of at least one downlink reference signal

[0205] In some embodiments, the radio channel attribute of at least one downlink reference signal may be obtained by terminal measurement.

[0206] In some specific embodiments, determining, based on the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes:

[0207] Determining at least one downlink reference signal set according to the radio channel attribute of the at least one downlink reference signal, wherein the radio channel attributes of the downlink reference signals in each downlink reference signal set are the same or similar;

[0208] The at least one downlink reference signal set is determined as the downlink reference signal set associated with the target SRS, or the SRS resource group configuration associated with the at least one downlink reference signal set is determined as the SRS resource group configuration associated with the target SRS.

[0209] In some embodiments of the present application, the method 400 further includes:

[0210] The terminal receives third configuration information from the network side device, and the third configuration information is used to configure the sending time information associated with each SRS resource group configuration in the K SRS resource group configurations, or the sending time information associated with each downlink reference signal set in the K downlink reference signal sets, or the sending time information associated with the K SRS groups.

[0211] Optionally, the sending time information associated with each SRS resource group configuration does not overlap with each other. When the terminal selects a certain SRS resource group configuration, it can use the associated sending time information to send SRS. In this way, the network side device can determine the SRS resource configuration associated with the SRS based on the sending time of the SRS.

[0212] Optionally, the sending time information associated with each downlink reference signal set does not overlap with each other. The terminal can use the associated sending time information to send SRS when selecting a downlink reference signal set, and the network side device can determine the downlink reference signal set associated with the SRS based on the sending time of the SRS.

[0213] In some embodiments, the transmission time information associated with each SRS resource group configuration includes the initial transmission time of a group of SRS corresponding to each SRS resource group configuration, or the minimum time difference information between a group of SRS corresponding to each SRS resource group configuration and the associated downlink reference signal set.

[0214] In some embodiments, the minimum time difference information between the group of SRS and the associated downlink reference signal set is used to indicate the minimum time difference between the group of SRS and the last downlink reference signal in the downlink reference signal set associated with the group of SRS, and the last downlink reference signal is the latest downlink reference signal in time in the downlink reference signal set.

[0215] The configuration method of the third configuration information is described below in conjunction with specific embodiments.

[0216] In some embodiments, the third configuration information may be periodically configured or semi-statically configured.

[0217] In some embodiments, the method 400 further includes:

[0218] The terminal receives third indication information from the network device side device, where the third indication information is used to indicate a valid time or period of the third configuration information. Within the valid time or period of the third configuration information, the third configuration information remains unchanged.

[0219] For example, taking K=7 as an example, the time resources associated with the 7 SRS resource group configurations or CSI-RS sets can be as shown in Figure 7. During the valid time or period of the third configuration information, the time resources associated with each SRS resource group configuration or CSI-RS set remain unchanged, and the time resources can be considered as semi-static or static time resources.

[0220] Optionally, the third indication information may be sent via an RRC message.

[0221] Optionally, the third indication information is included in the third configuration information. That is, when the network side device indicates the first configuration information, it also configures the validity period or period of the first configuration information.

[0222] In some embodiments, when the valid time or period of the third configuration information expires (in this case, the third configuration information can be considered invalid), the terminal sends a fifth message to the network side device to request to update the third configuration information. In response to the first message, the network side device sends a sixth message to the terminal, and the sixth message includes the updated third configuration information.

[0223] Optionally, the fifth message may include the uplink and downlink transmission requirements of the terminal, that is, the terminal may use the uplink and downlink transmission requirement request message to request the network side device to update the third configuration information.

[0224] Optionally, the validity period or period of the updated third configuration information may be carried in the sixth message. That is, when the network side device configures the first configuration information for the terminal, it also configures the validity period or period of the third configuration information.

[0225] In some embodiments, the third configuration information may be dynamically configured.

[0226] In some embodiments, the method 400 further includes:

[0227] The terminal receives a third downlink signaling from the network device side device, where the third downlink signaling is used to indicate updated third configuration information;

[0228] The terminal updates the third configuration information according to the third downlink signaling.

[0229] Optionally, the third downlink signaling may be DCI, MAC CE, RRC message, etc.

[0230] In some embodiments, when the network side device dynamically updates the SRS resource group configuration or the time resources associated with the downlink reference signal set, the network side device may only update the SRS resource group configuration associated with the target SRS or the time resources associated with the downlink reference signal set.

[0231] For example, when the second configuration information indicates a target SRS group index set, the network side device may only update the time resources associated with the SRS resource group configuration or downlink reference signal set indicated by the target SRS group index set, which is beneficial to reducing time resource overhead.

[0232] For example, if the second configuration information configures the SRS group index set as {#1, #2}, the network-side device configures the time resources corresponding to the SRS group index #1 and SRS group index #2, respectively, that is, the time resources associated with the SRS resource group configuration or downlink reference signal set indicated by the SRS group index #1 and SRS group index #2. For example, SRS group index #1 is configured to correspond to a first time resource, and SRS group index #2 is configured to correspond to a second time resource, where the first time resource and the second time resource are different.

[0233] In some embodiments of the present application, when the reference signal resource set or SRS resource group configuration associated with the target SRS is selected by the terminal, the network side device cannot know the reference signal resource set or SRS resource group configuration associated with the target SRS sent by the terminal, and the terminal can indicate to the network side device the reference signal resource set or SRS resource group configuration associated with the target SRS sent by the terminal.

[0234] For example, the terminal may explicitly indicate the reference signal resource set or SRS resource group configuration selected by the terminal through a bitmap, an SRS resource group configuration index, or a reference signal set index, etc. Alternatively, the reference signal resource set or SRS resource group configuration selected by the terminal may be implicitly indicated through the transmission time of the SRS.

[0235] In other embodiments, when the terminal does not indicate the reference signal resource set or SRS resource group configuration associated with the target SRS to the network side device, and the reference signal resource set or SRS resource group configuration used by the terminal is not configured by the network side device, the network side device can determine the reference signal resource set or SRS resource group configuration associated with the target SRS sent by the terminal by blindly detecting the SRS.

[0236] In some embodiments of the present application, the method 400 further includes:

[0237] In a case where the target SRS is triggered to be transmitted, the terminal triggers reception of a downlink reference signal set associated with the target SRS.

[0238] Correspondingly, when the terminal triggers the transmission of the target SRS, the network-side device triggers the transmission of the downlink reference signal set associated with the target SRS.

[0239] For example, the terminal determines to trigger the sending of SRS#1 and SRS#2, where SRS#1 is associated with CSI-RS#1 and SRS#2 is associated with CSI-RS#2. Then the network side device can determine to trigger the sending of CSI-RS#1 and CSI-RS#2, and the terminal can determine to trigger the receiving of CSI-RS#1 and CSI-RS#2.

[0240] In some embodiments, the target SRS is an aperiodic SRS, and the downlink reference signal set associated with the target SRS includes an aperiodic downlink reference signal.

[0241] In some embodiments of the present application, the method 400 further includes:

[0242] The transmit power of the target SRS is determined according to the path loss information of each downlink reference signal in the downlink reference signal set associated with the target SRS.

[0243] In some specific implementations, the terminal may determine the transmit power of the target SRS based on the minimum path loss, maximum path loss, average path loss or joint path loss of the downlink reference signals in the downlink reference signal set, wherein the joint path loss is determined based on the receiving power (denoted as the joint receiving power) calculated by the terminal for jointly receiving the downlink reference signals in the downlink reference signal set.

[0244] For example, the terminal can determine equivalent channel information based on the measurement results of each downlink reference signal in the downlink reference signal set, and the terminal can determine the receiving power for jointly receiving the downlink reference signals in the downlink reference signal set based on the equivalent channel information, and the joint path loss can be determined based on the joint receiving power.

[0245] Exemplarily, the target SRS transmit power may be determined according to the following formula:

[0246] Among them, P CMAX,f,c (i): represents the maximum transmit power configured for the terminal in carrier f, serving cell c, and SRS transmission time slot i;

[0247] P O_SRS,b,f,c (q s ): indicates carrier f, BWPb, serving cell c, SRS resource group configuration q s The configured p0 value;

[0248] M SRS,b,f,c (i): represents the number of SRS RBs configured in carrier f, BWP b, serving cell c, and transmit time slot i;

[0249] αSRS,b,f,c (q s ): indicates carrier f, BWP b, serving cell c, SRS resource group configuration q s The configured alpha value;

[0250] PL b,f,c (q d ): indicates that at carrier f, BWP b, serving cell c, for SRS resource group configuration q s , the terminal configures q through the SRS resource group s Associated CSI-RS set index q d The path loss is calculated based on the minimum path loss, maximum path loss, average path loss, or combined path loss.

[0251] h b,f,c (i,l)=δ SRS,b,f,c (i): represents the power adjustment value of the power adjustment state l at carrier f, BWP b, serving cell c, in SRS transmission time slot i.

[0252] In some embodiments, PL b,f,c (q d )=PL max (q d ), where PL max (q d ) represents CSI-RS set #q d The path loss corresponding to the CSI-RS with the largest path loss is, N k is the CSI-RS set #q d The number of CSI-RS in .

[0253] In some embodiments, PL b,f,c (q d )=PL min (q d ), where PL min (q d ) represents CSI-RS set #q d The path loss corresponding to the CSI-RS with the smallest path loss is, N k is the CSI-RS set #q d The number of CSI-RS in .

[0254] In some embodiments, PL b,f,c (q d )=PL ave (q d ), where PL ave (q d) represents CSI-RS set #q d The average value of the path loss of the CSI-RS in, that is, N k is the CSI-RS set #q d The number of CSI-RS in .

[0255] In some embodiments, PL b,f,c (q d )=PL ave,precoded (q d ), where PL ave,precoded (q d ) is calculated based on the terminal's CSI-RS set #q d For example, considering CSI-RS set #q d When all CSI-RS in the set are jointly transmitted, the terminal can calculate the CSI-RS set #q d The received power of all CSI-RSs in the combined reception is the combined received power, and then the joint path loss is determined according to the combined received power.

[0256] In some embodiments, the terminal determines, according to a downlink reference signal set associated with the target SRS to be sent, precoding information of the target SRS, including:

[0257] The terminal determines precoding information of the target SRS to be sent according to the number of downlink reference signal ports in a downlink reference signal set associated with the target SRS.

[0258] As an example, the terminal determines the precoding information of the target SRS based on the total number of ports of all downlink reference signals in the downlink reference signal set associated with the target SRS to be sent. Calculating the precoding information of the target SRS in this manner can improve the accuracy of the calculated precoding information.

[0259] As another example, the terminal determines at least one first precoding information based on the number of ports of each downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determines the precoding information of the target SRS based on the at least one first precoding information. That is, the terminal determines the corresponding precoding information based on the number of ports of a single downlink reference signal, and then determines the precoding information of the target SRS based on the precoding information corresponding to all downlink reference signals in the downlink reference signal set. Calculating the precoding information of the target SRS in this way can reduce the complexity of calculating the precoding information.

[0260] As another example, the terminal determines second precoding information based on the number of ports of a first downlink reference signal in a downlink reference signal set associated with a target SRS to be transmitted, and determines precoding information for the target SRS based on the second precoding information, wherein the first downlink reference signal includes at least one downlink reference signal in the downlink reference signal set associated with the target SRS. Calculating the precoding information of the target SRS in this manner can reduce the complexity of calculating the precoding information.

[0261] Optionally, the first downlink reference signal includes one or more downlink reference signals with the best signal quality in the downlink reference signal set, or one or more downlink reference signals with signal quality greater than a second threshold. Optionally, the second threshold may be an RSRP threshold, an RSRQ threshold, an SINR threshold, or an RSSI threshold. Optionally, the second threshold may be configured by a network-side device or predefined.

[0262] In a specific embodiment, the terminal can determine the precoding information of the target SRS based on the second precoding information, in combination with the number of ports of the first downlink reference signal and the total number of ports of all downlink reference signals in the downlink reference signal set. For example, based on the proportional relationship between the number of ports of the first downlink reference signal and the total number of ports of all downlink reference signals in the downlink reference signal set, the second precoding information is expanded to precoding information corresponding to the total number of ports, thereby obtaining the precoding information of the target SRS. For example, the precoding information corresponding to the ports of other downlink reference signals other than the first downlink reference signal in the downlink reference signal set can use or copy part or all of the second precoding information. In summary, in an embodiment of the present application, an SRS can be associated with one or more downlink reference signals, and the terminal can calculate the precoding information based on the downlink reference signal associated with the SRS, and then transmit the SRS based on the precoding information. This transmission method can support when the terminal is connected to multiple TRPs. The terminal calculates a more accurate SRS precoder based on the downlink reference signals associated with the multiple TRPs transmitted jointly, and then transmits the SRS based on the SRS precoder. This is conducive to ensuring that the network-side equipment performs more accurate uplink channel measurements, and then configures more accurate uplink transmission to ensure uplink transmission performance. Among them, the scenarios where the terminal is connected to multiple TRPs can include CJR reception scenarios of multiple sub-arrays of a large antenna array on the network side, and scenarios where multiple TRPs perform CJR reception in a cell-free network. In addition, the number of ports used for uplink reception on the network-side equipment increases, which is conducive to improving the uplink transmission rate.

[0263] The above text, in combination with Figures 4 to 7, describes in detail the method embodiment of the present application. The following text, in combination with Figures 8 to 12, describes in detail the device embodiment of the present application. It should be understood that the device embodiment and the method embodiment correspond to each other, and similar descriptions can refer to the method embodiment.

[0264] The method for transmitting a sounding reference signal (SRS) provided in the embodiment of the present application may be performed by a communication device. The embodiment of the present application takes the method for transmitting a sounding reference signal (SRS) performed by a communication device as an example to illustrate the communication device provided in the embodiment of the present application.

[0265] FIG8 shows a schematic block diagram of a communication device 600 according to an embodiment of the present application. As shown in FIG8 , the communication device 600 includes:

[0266] The processing unit 610 is configured to obtain an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; and determine precoding information of a target SRS to be transmitted based on the downlink reference signal set associated with the target SRS;

[0267] The communication unit 620 transmits the target SRS using the precoding information.

[0268] In some embodiments, the processing unit 610 is further configured to:

[0269] Acquire a first mapping relationship, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal;

[0270] An association relationship between the SRS and a downlink reference signal is determined according to the first mapping relationship.

[0271] In some embodiments, the first mapping relationship is included in a transmission configuration indication TCI status indication.

[0272] In some embodiments, the processing unit 610 is further configured to:

[0273] The terminal receives first configuration information from a network side device, where the first configuration information is used to indicate K SRS resource group configurations, where K is a positive integer, each SRS in each SRS resource group configuration is associated with the same downlink reference signal set, and each SRS resource group configuration is used to send the SRS in the SRS resource group configuration.

[0274] In some embodiments, the communication unit 620 is further configured to:

[0275] First indication information is received from the network device side device, where the first indication information is used to indicate a valid time or period of the first configuration information.

[0276] In some embodiments, the communication unit 620 is further configured to:

[0277] receiving a first downlink signaling from the network device side device, where the first downlink signaling is used to indicate updated first configuration information;

[0278] The terminal updates the first configuration information according to the first downlink signaling.

[0279] In some embodiments, the communication unit 620 is further configured to:

[0280] Second configuration information is received from the network side device, where the second configuration information is used to configure the communication device 600 to send a target number M of SRS groups, or a target SRS group index set, wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration or a downlink reference signal set associated with the SRS resource group configuration, wherein the target SRS includes M groups of SRS, where M is a positive integer.

[0281] In some embodiments, the communication unit 620 is further configured to:

[0282] Second indication information is received from the network device side device, where the second indication information is used to indicate a valid time or period of the second configuration information.

[0283] In some embodiments, the communication unit 620 is further configured to:

[0284] receiving a second downlink signaling from the network device side device, where the second downlink signaling is used to indicate updated second configuration information;

[0285] The terminal updates the second configuration information according to the second downlink signaling.

[0286] In some embodiments, the processing unit 610 is further configured to:

[0287] Determine, according to at least one of the second configuration information and the first information, an SRS resource group configuration or a downlink reference signal set associated with the target SRS;

[0288] The first information includes at least one of the following:

[0289] downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission;

[0290] The association between the subarray and the downlink reference signal;

[0291] Uplink and downlink time slot configuration of at least one transmit / receive point (TRP);

[0292] Downlink reference signal associated uplink and downlink time slot configuration;

[0293] Downlink reference signal restriction information, used to indicate at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal;

[0294] TRP restriction information, used to indicate at least one of a mandatory TRP, an optional TRP, and an unavailable TRP;

[0295] A radio channel attribute of at least one downlink reference signal, wherein the radio channel attribute comprises at least one of Doppler spread, Doppler frequency shift, average delay, delay spread, average gain, and a spatial receiver parameter.

[0296] In some embodiments, the processing unit 610 is further configured to:

[0297] If the second configuration information is used to configure the target SRS group index set, the M SRS resource group configurations indicated by the target SRS group index set are determined as the SRS resource group configurations associated with the target SRS, or the M downlink reference signal sets indicated by the target SRS group index set are determined as the downlink reference signal sets associated with the target SRS; or

[0298] If the second configuration information is used to configure the target number of groups for sending SRS by the terminal, the downlink reference signal set associated with the target SRS or the SRS resource group configuration associated with the target SRS is determined according to the first information.

[0299] In some embodiments, the processing unit 610 is further configured to:

[0300] If the first information includes group information of a downlink reference signal, measuring the downlink reference signal in at least one group according to the group information of the downlink reference signal, and determining a target downlink reference signal in each group according to the measurement result of the downlink reference signal in each group;

[0301] The target SRS-associated downlink reference signal set includes the target downlink signal in each group, or the target SRS-associated SRS resource group configuration is determined according to the target SRS-associated downlink reference signal set.

[0302] In some embodiments, the processing unit 610 is further configured to:

[0303] If the first information includes an association relationship between a subarray and a downlink reference signal, measuring at least one subarray, and determining a target subarray in the at least one subarray according to a measurement result of the at least one subarray;

[0304] The target SRS-associated downlink reference signal set includes the target subarray-associated downlink reference signal, or the target SRS-associated SRS resource group configuration is determined according to the target SRS-associated downlink reference signal set.

[0305] In some embodiments, the processing unit 610 is further configured to:

[0306] If the first information includes an uplink and downlink time slot configuration of at least one TRP, determining a target TRP that supports uplink transmission within a target time period of the terminal according to the uplink and downlink time slot configuration of the at least one TRP, wherein the target time period of the terminal is a time period in which the terminal supports uplink transmission;

[0307] The target SRS-associated downlink reference signal set includes the target TRP-associated downlink reference signal, or the target SRS-associated SRS resource group configuration is determined based on the target SRS-associated downlink reference signal set.

[0308] In some embodiments, the processing unit 610 is further configured to:

[0309] If the first information includes a radio channel attribute of at least one downlink reference signal, determining at least one downlink reference signal set according to the radio channel attribute of the at least one downlink reference signal, wherein the downlink reference signals in each downlink reference signal set have the same radio channel attribute;

[0310] The at least one downlink reference signal set is determined as the downlink reference signal set associated with the target SRS, or the SRS resource group configuration associated with the at least one downlink reference signal set is determined as the SRS resource group configuration associated with the target SRS.

[0311] In some embodiments, the communication unit 620 is further configured to:

[0312] The terminal sends the target SRS using the SRS resources in the SRS resource group configuration associated with the target SRS and the precoding information.

[0313] In some embodiments, the communication unit 620 is further configured to:

[0314] Third configuration information is received from a network-side device, where the third configuration information is used to configure transmission time information associated with each of K SRS resource group configurations, where K is a positive integer.

[0315] In some embodiments, the transmission time information associated with each SRS resource group configuration includes the initial transmission time of a group of SRS corresponding to each SRS resource group configuration, or the minimum time difference information between a group of SRS corresponding to each SRS resource group configuration and the associated downlink reference signal set.

[0316] In some embodiments, the minimum time difference information between the group of SRS and the associated downlink reference signal set is used to indicate the minimum time difference between the group of SRS and the last downlink reference signal in the downlink reference signal set associated with the group of SRS, and the last downlink reference signal is the latest downlink reference signal in time in the downlink reference signal set.

[0317] In some embodiments, the communication unit 620 is further configured to:

[0318] Receive third indication information from the network device side device, where the third indication information is used to indicate a valid time or period of the third configuration information.

[0319] In some embodiments, the communication unit 620 is further configured to:

[0320] receiving a third downlink signaling from the network device side device, where the third downlink signaling is used to indicate updated third configuration information;

[0321] The terminal updates the third configuration information according to the third downlink signaling.

[0322] In some embodiments, the communication unit 620 is further configured to:

[0323] In a case where the target SRS is triggered for transmission, a downlink reference signal set associated with the target SRS is triggered for reception, wherein the target SRS is an aperiodic SRS, and the downlink reference signal set associated with the target SRS includes an aperiodic downlink reference signal.

[0324] In some embodiments, the processing unit 610 is further configured to:

[0325] The transmit power of the target SRS is determined according to the path loss of each downlink reference signal in the downlink reference signal set associated with the target SRS.

[0326] In some embodiments, the processing unit 610 is further configured to:

[0327] The transmission power of the target SRS is determined based on the minimum path loss, maximum path loss, average path loss or joint path loss of the downlink reference signals in the downlink reference signal set, wherein the joint path loss is determined based on the received power of the downlink reference signals in the downlink reference signal set calculated by the communication device 600.

[0328] In some embodiments, the processing unit 610 is further configured to:

[0329] Determining precoding information of the target SRS according to the total number of ports of all downlink reference signals in a downlink reference signal set associated with the target SRS to be sent; or

[0330] Determining at least one first precoding information according to the number of ports of each downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determining the precoding information of the target SRS based on the at least one first precoding information; or

[0331] Determine second precoding information based on the number of ports of the first downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determine precoding information of the target SRS based on the second precoding information, wherein the first downlink reference signal includes at least one downlink reference signal in the downlink reference signal set associated with the target SRS.

[0332] Alternatively, in some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0333] It should be understood that the communication device 600 according to the embodiment of the present application may correspond to the terminal in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the communication device 600 are respectively for realizing the process executed by the terminal in the method embodiment shown in Figures 4 to 7 and achieving the same technical effect. To avoid repetition, they will not be repeated here.

[0334] FIG9 shows a schematic block diagram of a communication device 700 according to an embodiment of the present application. As shown in FIG9 , the device 700 includes:

[0335] The sending unit 710 is configured to indicate an association relationship between an SRS and a downlink reference signal to a terminal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal;

[0336] The receiving unit 720 is configured to receive a target SRS sent by the terminal, wherein precoding information of the target SRS is determined according to a downlink reference signal set associated with the target SRS.

[0337] In some embodiments, the sending unit 710 is further configured to:

[0338] The network-side device indicates a first mapping relationship to the terminal, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal, and the first mapping relationship is used to determine an association relationship between the SRS and the downlink reference signal.

[0339] In some embodiments, the first mapping relationship is included in a transmission configuration indication TCI status indication.

[0340] In some embodiments, the sending unit 710 is further configured to:

[0341] First configuration information is sent to the terminal, where the first configuration information is used to configure K SRS resource group configurations, where each SRS in each SRS resource group configuration is associated with the same downlink reference signal set, and K is a positive integer.

[0342] In some embodiments, the sending unit 710 is further configured to:

[0343] Sending first indication information to the terminal, where the first indication information is used to indicate a valid time or period of the first configuration information.

[0344] In some embodiments, the sending unit 710 is further configured to:

[0345] A first downlink signaling is sent to the terminal, where the first downlink signaling is used to indicate updated first configuration information.

[0346] In some embodiments, the sending unit 710 is further configured to:

[0347] Send second configuration information to the terminal, wherein the second configuration information is used to configure the target number M of SRS groups sent by the terminal, or a target SRS group index set, wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration or a downlink reference signal set associated with the SRS resource group configuration, wherein the target SRS includes M groups of SRS, and M is a positive integer.

[0348] In some embodiments, the sending unit 710 is further configured to:

[0349] Sending second indication information to the terminal, where the second indication information is used to indicate the valid time or period of the second configuration information.

[0350] In some embodiments, the sending unit 710 is further configured to:

[0351] Sending second downlink signaling to the terminal, where the second downlink signaling is used to indicate updated second configuration information.

[0352] In some embodiments, the sending unit 710 is further configured to:

[0353] Third configuration information is sent to the terminal, where the third configuration information is used to configure sending time information associated with each SRS resource group configuration in K SRS resource group configurations, where K is a positive integer.

[0354] In some embodiments, the transmission time information associated with each SRS resource group configuration includes the initial transmission time of a group of SRS associated with each SRS resource group configuration, or the minimum time difference information between a group of SRS associated with each SRS resource group configuration and the associated downlink reference signal set.

[0355] In some embodiments, the minimum time difference information between the group of SRS and the associated downlink reference signal set is used to indicate the minimum time difference between the group of SRS and the last downlink reference signal in the downlink reference signal set associated with the group of SRS, and the last downlink reference signal is the latest downlink reference signal in time in the downlink reference signal set.

[0356] In some embodiments, the sending unit 710 is further configured to:

[0357] Send third indication information to the terminal, where the third indication information is used to indicate the valid time or period of the third configuration information.

[0358] In some embodiments, the sending unit 710 is further configured to:

[0359] Sending third downlink signaling to the terminal, where the third downlink signaling is used to indicate updated third configuration information.

[0360] In some embodiments, the sending unit 710 is further configured to:

[0361] Sending fourth configuration information to the terminal, where the fourth configuration information is used to configure at least one of the following:

[0362] downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission;

[0363] The association between the subarray and the downlink reference signal;

[0364] Uplink and downlink time slot configuration of at least one transmit / receive point (TRP);

[0365] Downlink reference signal associated uplink and downlink time slot configuration;

[0366] Downlink reference signal restriction information, used to indicate at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal;

[0367] The restriction information of the TRP is used to indicate at least one of a mandatory TRP, an optional TRP, and an unavailable TRP.

[0368] In some embodiments, the sending unit 710 is further configured to:

[0369] In the case where the target SRS is triggered for transmission, the transmission of a downlink reference signal set associated with the target SRS is triggered, wherein the target SRS is an aperiodic SRS, and the downlink reference signal set associated with the target SRS includes an aperiodic downlink reference signal.

[0370] Optionally, in some embodiments, the sending unit and the receiving unit may be a communication interface or a transceiver, or an input and output interface of a communication chip or a system on chip.

[0371] It should be understood that the communication device 700 according to the embodiment of the present application may correspond to the network side device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the communication device 700 are respectively for realizing the process executed by the network side device in the method embodiment shown in Figures 4 to 7 and achieving the same technical effect. To avoid repetition, they will not be repeated here.

[0372] In some embodiments, the apparatus 600 and apparatus 700 in the embodiments of the present application may be electronic devices, such as electronic devices with an operating system, or components in electronic devices, such as integrated circuits or chips. The electronic device may be a terminal, or may be other devices other than a terminal. For example, the terminal may include but is not limited to the types of terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0373] As shown in Figure 10, an embodiment of the present application further provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores a program or instruction that can be executed on the processor 801. For example, when the communication device 800 is a terminal, the program or instruction, when executed by the processor 801, implements the steps performed by the terminal in the above-mentioned embodiment of the method for transmitting a sounding reference signal (SRS), and can achieve the same technical effect. When the communication device 800 is a network-side device, the program or instruction, when executed by the processor 801, implements the various steps performed by the network-side device in the above-mentioned embodiment of the method for transmitting a sounding reference signal (SRS), and can achieve the same technical effect. To avoid repetition, they are not further described here.

[0374] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiments shown in Figures 4 to 7. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 11 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0375] The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909 and at least some of the components of the processor 910.

[0376] Those skilled in the art will appreciate that the terminal 900 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 910 through a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system. The terminal structure shown in Figure 11 does not constitute a limitation of the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be described in detail here.

[0377] It should be understood that in an embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0378] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 901 may transmit the data to the processor 910 for processing. Furthermore, the RF unit 901 may send uplink data to the network-side device. Typically, the RF unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0379] The memory 909 can be used to store software programs or instructions and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 909 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0380] Processor 910 may include one or more processing units. Optionally, processor 910 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 910.

[0381] The processor 910 is configured to obtain an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; and determine precoding information of a target SRS to be sent based on the downlink reference signal set associated with the target SRS;

[0382] The radio frequency unit 901 is configured to send the target SRS using the precoding information.

[0383] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the terminal in the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0384] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 4 to 7. This network-side device embodiment corresponds to the aforementioned network-side device-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this network-side device embodiment and can achieve the same technical effects.

[0385] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 12, the network-side device 1000 includes an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004, and a memory 1005. Antenna 1001 is connected to radio frequency device 1002. In the uplink direction, radio frequency device 1002 receives information via antenna 1001 and sends the received information to baseband device 1003 for processing. In the downlink direction, baseband device 1003 processes the information to be transmitted and sends it to radio frequency device 1002. Radio frequency device 1002 processes the received information and then sends it through antenna 1001.

[0386] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1003 , which includes a baseband processor.

[0387] The baseband device 1003 may, for example, include at least one baseband board, on which multiple chips are arranged, as shown in Figure 12, one of which is, for example, a baseband processor, which is connected to the memory 1005 through a bus interface to call the program in the memory 1005 and execute the network device operations shown in the above method embodiment.

[0388] The network side device may further include a network interface 1006, which is, for example, a Common Public Radio Interface (CPRI).

[0389] In some embodiments, the network side device 1000 of the embodiment of the present application also includes: instructions or programs stored on the memory 1005 and can be run on the processor 1004. The processor 1004 calls the instructions or programs in the memory 1005 to execute the steps performed by the network side device in the method embodiments shown in Figures 4 to 7, and achieves the same technical effect. To avoid repetition, they are not repeated here.

[0390] The processors mentioned in the embodiments of the present application may include general-purpose processors, special-purpose processors, etc., such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligence (AI) processor, a graphics processing unit (GPU), an application-specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc.

[0391] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned embodiment of the sounding reference signal SRS transmission method are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0392] The processor is the processor in the terminal or network-side device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0393] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned embodiment of the sounding reference signal SRS transmission method, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0394] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0395] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned embodiment of the sounding reference signal SRS transmission method, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0396] An embodiment of the present application also provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the above-mentioned sounding reference signal SRS transmission method, and the network side device can be used to execute the above-mentioned steps of the above-mentioned sounding reference signal SRS transmission method.

[0397] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0398] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0399] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for transmitting a sounding reference signal (SRS), wherein: include: The terminal obtains an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; The terminal determines, according to a downlink reference signal set associated with a target SRS to be sent, precoding information of the target SRS; The terminal sends the target SRS using the precoding information.

2. The method according to claim 1, wherein The terminal obtains the association relationship between the SRS and the downlink reference signal, including: The terminal acquires a first mapping relationship, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal; An association relationship between the SRS and a downlink reference signal is determined according to the first mapping relationship.

3. The method according to claim 2, wherein: The first mapping relationship is included in the transmission configuration indication TCI status indication.

4. The method according to claim 1, wherein The terminal obtains the association relationship between the SRS and the downlink reference signal, including: The terminal receives first configuration information from a network side device, where the first configuration information is used to indicate K SRS resource group configurations, where K is a positive integer, each SRS in each SRS resource group configuration is associated with the same downlink reference signal set, and each SRS resource group configuration is used to send the SRS in the SRS resource group configuration.

5. The method according to claim 4, wherein The method further comprises: The terminal receives first indication information from the network device side device, where the first indication information is used to indicate a valid time or period of the first configuration information.

6. The method according to claim 4, wherein: The method further comprises: The terminal receives first downlink signaling from the network device side device, where the first downlink signaling is used to indicate updated first configuration information; The terminal updates the first configuration information according to the first downlink signaling.

7. The method according to any one of claims 4 to 6, wherein The method further comprises: The terminal receives second configuration information from the network side device, and the second configuration information is used to configure the target number M of SRS groups sent by the terminal, or the target SRS group index set, wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration or a downlink reference signal set associated with the SRS resource group configuration, wherein the target SRS includes M groups of SRS, and M is a positive integer.

8. The method according to claim 7, wherein: The method further comprises: The terminal receives second indication information from the network device side device, where the second indication information is used to indicate a valid time or period of the second configuration information.

9. The method according to claim 7, wherein: The method further comprises: The terminal receives second downlink signaling from the network device side device, where the second downlink signaling is used to indicate updated second configuration information; The terminal updates the second configuration information according to the second downlink signaling.

10. The method according to any one of claims 7 to 9, wherein: The method further comprises: Determine, according to at least one of the second configuration information and the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS; The first information includes at least one of the following: downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission; The association between the subarray and the downlink reference signal; Uplink and downlink time slot configuration of at least one transmit / receive point (TRP); Downlink reference signal associated uplink and downlink time slot configuration; Downlink reference signal restriction information, used to indicate at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal; TRP restriction information, used to indicate at least one of a mandatory TRP, an optional TRP, and an unavailable TRP; A radio channel attribute of at least one downlink reference signal, wherein the radio channel attribute comprises at least one of Doppler spread, Doppler frequency shift, average delay, delay spread, average gain, and a spatial receiver parameter.

11. The method according to any one of claims 7 to 9, wherein: The determining, according to at least one of the second configuration information and the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes: If the second configuration information is used to configure the target SRS group index set, the M SRS resource group configurations indicated by the target SRS group index set are determined as the SRS resource group configurations associated with the target SRS, or the M downlink reference signal sets indicated by the target SRS group index set are determined as the downlink reference signal sets associated with the target SRS; or If the second configuration information is used to configure the target number of groups for sending SRS by the terminal, the downlink reference signal set associated with the target SRS or the SRS resource group configuration associated with the target SRS is determined according to the first information.

12. The method according to claim 10 or 11, wherein: The determining, according to the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes: If the first information includes group information of a downlink reference signal, measuring the downlink reference signal in at least one group according to the group information of the downlink reference signal, and determining a target downlink reference signal in each group according to the measurement result of the downlink reference signal in each group; The target SRS-associated downlink reference signal set includes the target downlink signal in each group, or the target SRS-associated SRS resource group configuration is determined according to the target SRS-associated downlink reference signal set.

13. The method according to claim 10 or 11, wherein: The determining, according to the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes: If the first information includes an association relationship between a subarray and a downlink reference signal, measuring at least one subarray, and determining a target subarray in the at least one subarray according to a measurement result of the at least one subarray; The target SRS-associated downlink reference signal set includes the target subarray-associated downlink reference signal, or the target SRS-associated SRS resource group configuration is determined according to the target SRS-associated downlink reference signal set.

14. The method according to claim 10 or 11, wherein: The determining, according to the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes: If the first information includes uplink and downlink time slot configurations of at least one TRP, determining a target TRP that supports uplink transmission within a target time period of the terminal according to the uplink and downlink time slot configurations of the at least one TRP, wherein the target time period of the terminal is a time period in which the terminal supports uplink transmission; The target SRS-associated downlink reference signal set includes the target TRP-associated downlink reference signal, or the target SRS-associated SRS resource group configuration is determined based on the target SRS-associated downlink reference signal set.

15. The method according to claim 10 or 11, wherein: The determining, according to the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS includes: If the first information includes a radio channel attribute of at least one downlink reference signal, determining at least one downlink reference signal set according to the radio channel attribute of the at least one downlink reference signal, wherein the downlink reference signals in each downlink reference signal set have the same radio channel attribute; The at least one downlink reference signal set is determined as the downlink reference signal set associated with the target SRS, or the SRS resource group configuration associated with the at least one downlink reference signal set is determined as the SRS resource group configuration associated with the target SRS.

16. The method according to any one of claims 10 to 15, wherein The terminal sending the target SRS using the precoding information includes: The terminal sends the target SRS using the SRS resources in the SRS resource group configuration associated with the target SRS and the precoding information.

17. The method according to any one of claims 1 to 16, wherein: The method further comprises: The terminal receives third configuration information from a network-side device, where the third configuration information is used to configure sending time information associated with each of K SRS resource group configurations, where K is a positive integer.

18. The method according to claim 17, wherein The transmission time information associated with each SRS resource group configuration includes the initial transmission time of a group of SRSs corresponding to each SRS resource group configuration, or the minimum time difference information between a group of SRSs corresponding to each SRS resource group configuration and the associated downlink reference signal set.

19. The method according to claim 18, wherein The minimum time difference information between the group of SRS and the associated downlink reference signal set is used to indicate the minimum time difference between the group of SRS and the last downlink reference signal in the downlink reference signal set associated with the group of SRS, and the last downlink reference signal is the latest downlink reference signal in time in the downlink reference signal set.

20. The method according to any one of claims 17 to 19, wherein: The method further comprises: The terminal receives third indication information from the network device side device, where the third indication information is used to indicate a valid time or period of the third configuration information.

21. The method according to any one of claims 17 to 19, wherein: The method further comprises: The terminal receives a third downlink signaling from the network device side device, where the third downlink signaling is used to indicate updated third configuration information; The terminal updates the third configuration information according to the third downlink signaling.

22. The method according to any one of claims 1 to 21, wherein The method further comprises: When the target SRS is triggered for transmission, the terminal triggers reception of a downlink reference signal set associated with the target SRS, wherein the target SRS is an aperiodic SRS, and the downlink reference signal set associated with the target SRS includes an aperiodic downlink reference signal.

23. The method according to any one of claims 1 to 22, wherein The method further comprises: The transmit power of the target SRS is determined according to the path loss of each downlink reference signal in the downlink reference signal set associated with the target SRS.

24. The method according to claim 23, wherein The determining, according to the path loss of each downlink reference signal in the downlink reference signal set associated with the target SRS, the transmit power of the target SRS includes: The transmit power of the target SRS is determined according to the minimum path loss, maximum path loss, average path loss or joint path loss of the downlink reference signals in the downlink reference signal set, wherein the joint path loss is determined based on the receive power calculated by the terminal for jointly receiving the downlink reference signals in the downlink reference signal set.

25. The method according to any one of claims 1 to 24, wherein The terminal determines, according to a downlink reference signal set associated with a target SRS to be sent, precoding information of the target SRS, including: The terminal determines, according to the total number of ports of all downlink reference signals in a downlink reference signal set associated with the target SRS to be sent, precoding information of the target SRS; or The terminal determines at least one first precoding information according to the number of ports of each downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determines the precoding information of the target SRS based on the at least one first precoding information; or The terminal determines second precoding information based on the number of ports of the first downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determines the precoding information of the target SRS based on the second precoding information, wherein the first downlink reference signal includes at least one downlink reference signal in the downlink reference signal set associated with the target SRS.

26. The method according to claim 4 or 17, wherein The SRS resource group configuration includes an associated downlink reference signal indication.

27. The method according to claim 4 or 17, wherein The SRS resource group configuration is used to indicate an SRS-associated downlink reference signal set in the SRS resource group configuration.

28. A method for transmitting a sounding reference signal (SRS), wherein: include: The network-side device indicates to the terminal an association relationship between the SRS and the downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; The network-side device receives a target SRS sent by the terminal, wherein precoding information of the target SRS is determined according to a downlink reference signal set associated with the target SRS.

29. The method according to claim 28, wherein The network side device indicates to the terminal an association relationship between the SRS and the downlink reference signal, including: The network-side device indicates a first mapping relationship to the terminal, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal, and the first mapping relationship is used to determine an association relationship between the SRS and the downlink reference signal.

30. The method of claim 28, wherein The network side device indicates to the terminal an association relationship between the SRS and the downlink reference signal, including: The network side device sends first configuration information to the terminal, where the first configuration information is used to configure K SRS resource group configurations, wherein the SRS in each SRS resource group configuration is associated with a downlink reference signal set, and K is a positive integer.

31. The method according to claim 30, wherein The method further comprises: The network side device sends first indication information to the terminal, where the first indication information is used to indicate a valid time or period of the first configuration information.

32. The method according to claim 30, wherein The method further comprises: The network-side device sends a first downlink signaling to the terminal, where the first downlink signaling is used to indicate updated first configuration information.

33. The method according to any one of claims 30 to 32, wherein: The method further comprises: The network side device sends second configuration information to the terminal, and the second configuration information is used to configure the target number M of SRS groups sent by the terminal, or the target SRS group index set, wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration or a downlink reference signal set associated with the SRS resource group configuration, wherein the target SRS includes M groups of SRS, and M is a positive integer.

34. The method according to claim 33, wherein The method further comprises: The network side device sends second indication information to the terminal, where the second indication information is used to indicate a valid time or period of the second configuration information.

35. The method of claim 33, wherein: The method further comprises: The network-side device sends second downlink signaling to the terminal, where the second downlink signaling is used to indicate updated second configuration information.

36. The method according to any one of claims 28 to 35, wherein The method further comprises: The network-side device sends third configuration information to the terminal, where the third configuration information is used to configure sending time information associated with each of K SRS resource group configurations, where K is a positive integer.

37. The method according to claim 36, wherein The transmission time information associated with each SRS resource group configuration includes the initial transmission time of a group of SRSs associated with each SRS resource group configuration, or the minimum time difference information between a group of SRSs associated with each SRS resource group configuration and the associated downlink reference signal set.

38. The method according to any one of claims 36-37, wherein The method further comprises: The network side device sends third indication information to the terminal, where the third indication information is used to indicate the valid time or period of the third configuration information.

39. The method according to any one of claims 36-37, wherein The method further comprises: The network-side device sends a third downlink signaling to the terminal, where the third downlink signaling is used to indicate updated third configuration information.

40. The method according to any one of claims 28 to 39, wherein The method further comprises: The network-side device sends fourth configuration information to the terminal, where the fourth configuration information is used to configure at least one of the following: downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission; The association between the subarray and the downlink reference signal; Uplink and downlink time slot configuration of at least one transmit / receive point (TRP); Downlink reference signal associated uplink and downlink time slot configuration; Downlink reference signal restriction information, used to indicate at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal; The restriction information of the TRP is used to indicate at least one of a mandatory TRP, an optional TRP, and an unavailable TRP.

41. The method according to any one of claims 28 to 40, wherein The method further comprises: When the target SRS is triggered for transmission, the network side device triggers transmission of a downlink reference signal set associated with the target SRS, wherein the target SRS is an aperiodic SRS, and the downlink reference signal set associated with the target SRS includes an aperiodic downlink reference signal.

42. The method according to claim 30 or 36, wherein The SRS resource group configuration includes an associated downlink reference signal indication.

43. The method according to claim 30 or 36, wherein The SRS resource group configuration is used to indicate an SRS-associated downlink reference signal set in the SRS resource group configuration.

44. A communication device, wherein: include: a processing unit, configured to obtain an association relationship between an SRS and a downlink reference signal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; and determine precoding information of a target SRS to be transmitted based on the downlink reference signal set associated with the target SRS; A communication unit is configured to send the target SRS using the precoding information.

45. The communication device according to claim 44, wherein The processing unit is further configured to: Acquire a first mapping relationship, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal; An association relationship between the SRS and a downlink reference signal is determined according to the first mapping relationship.

46. ​​The communication device according to claim 44, wherein The communication unit is further configured to: First configuration information is received from a network side device, where the first configuration information is used to indicate K SRS resource group configurations, where K is a positive integer, each SRS in each SRS resource group configuration is associated with the same downlink reference signal set, and each SRS resource group configuration is used to send the SRS in the SRS resource group configuration.

47. The communication device according to claim 46, wherein The communication unit is further configured to: Second configuration information is received from the network side device, where the second configuration information is used to configure the target number M of SRS groups sent by the communication device, or a target SRS group index set, wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration or a downlink reference signal set associated with the SRS resource group configuration, wherein the target SRS includes M groups of SRS, where M is a positive integer.

48. The communication device according to claim 46 or 47, wherein: The processing unit is further configured to: Determine, according to at least one of the second configuration information and the first information, a downlink reference signal set associated with the target SRS or an SRS resource group configuration associated with the target SRS; The first information includes at least one of the following: downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission; The association between the subarray and the downlink reference signal; Uplink and downlink time slot configuration of at least one transmit / receive point (TRP); Downlink reference signal associated uplink and downlink time slot configuration; Downlink reference signal restriction information, used to indicate at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal; TRP restriction information, used to indicate at least one of a mandatory TRP, an optional TRP, and an unavailable TRP; A radio channel attribute of at least one downlink reference signal, wherein the radio channel attribute comprises at least one of Doppler spread, Doppler frequency shift, average delay, delay spread, average gain, and a spatial receiver parameter.

49. The communication device according to claim 48, wherein The communication unit is further configured to: The target SRS is sent using the SRS resources in the SRS resource group configuration associated with the target SRS and the precoding information.

50. The communication device according to any one of claims 46 to 49, wherein: The communication unit is further configured to: Third configuration information is received from a network-side device, where the third configuration information is used to configure transmission time information associated with each of K SRS resource group configurations, where K is a positive integer.

51. The communication device according to any one of claims 44 to 50, wherein: The processing unit is further configured to: The transmit power of the target SRS is determined according to the path loss of each downlink reference signal in the downlink reference signal set associated with the target SRS.

52. The communication device according to claim 51, wherein The processing unit is further configured to: The transmission power of the target SRS is determined according to the minimum path loss, maximum path loss, average path loss or joint path loss of the downlink reference signals in the downlink reference signal set, wherein the joint path loss is determined based on the reception power of the downlink reference signals in the downlink reference signal set calculated by the communication device.

53. The communication device according to any one of claims 44 to 52, wherein: The processing unit is further configured to: Determining precoding information of the target SRS according to the total number of ports of all downlink reference signals in a downlink reference signal set associated with the target SRS to be sent; or Determining at least one first precoding information according to the number of ports of each downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determining the precoding information of the target SRS based on the at least one first precoding information; or Determine second precoding information based on the number of ports of the first downlink reference signal in the downlink reference signal set associated with the target SRS to be sent, and determine precoding information of the target SRS based on the second precoding information, wherein the first downlink reference signal includes at least one downlink reference signal in the downlink reference signal set associated with the target SRS.

54. A communication device, wherein: include: a sending unit, configured to indicate an association relationship between an SRS and a downlink reference signal to a terminal, wherein one SRS is associated with one downlink reference signal set, and one downlink reference signal set includes at least one downlink reference signal; The receiving unit is configured to receive a target SRS sent by the terminal, wherein precoding information of the target SRS is determined according to a downlink reference signal set associated with the target SRS.

55. The communication device according to claim 54, wherein The sending unit is further configured to: A first mapping relationship is indicated to the terminal, where the first mapping relationship represents a port mapping relationship between an SRS and a downlink reference signal, and the first mapping relationship is used to determine an association relationship between the SRS and the downlink reference signal.

56. The communication device according to claim 54, wherein The sending unit is further configured to: First configuration information is sent to the terminal, where the first configuration information is used to configure K SRS resource group configurations, where each SRS in each SRS resource group configuration is associated with the same downlink reference signal set, and K is a positive integer.

57. The communication device according to claim 56, wherein The sending unit is further configured to: Send second configuration information to the terminal, wherein the second configuration information is used to configure the target number M of SRS groups sent by the terminal, or a target SRS group index set, wherein the target SRS group index set includes M SRS group indexes, and each SRS group index is used to indicate an SRS resource group configuration or a downlink reference signal set associated with the SRS resource group configuration, wherein the target SRS includes M groups of SRS, and M is a positive integer.

58. The communication device according to claim 56 or 57, wherein: The sending unit is further configured to: Third configuration information is sent to the terminal, where the third configuration information is used to configure sending time information associated with each SRS resource group configuration in K SRS resource group configurations, where K is a positive integer.

59. The communication device according to any one of claims 54 to 58, wherein: The sending unit is further configured to: Sending fourth configuration information to the terminal, where the fourth configuration information is used to configure at least one of the following: downlink reference signal grouping information, where the downlink reference signals in a group support joint transmission; The association between the subarray and the downlink reference signal; Uplink and downlink time slot configuration of at least one transmit / receive point (TRP); Downlink reference signal associated uplink and downlink time slot configuration; Downlink reference signal restriction information, used to indicate at least one of a mandatory downlink reference signal, an optional downlink reference signal, and an unavailable downlink reference signal; The restriction information of the TRP is used to indicate at least one of a mandatory TRP, an optional TRP, and an unavailable TRP.

60. The communication device according to any one of claims 54 to 59, wherein: The sending unit is further configured to: In the case where the target SRS is triggered for transmission, the transmission of a downlink reference signal set associated with the target SRS is triggered, wherein the target SRS is an aperiodic SRS, and the downlink reference signal set associated with the target SRS includes an aperiodic downlink reference signal.

61. A communication device, wherein: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 27 or the steps of the method according to any one of claims 28 to 43 are implemented.

62. A readable storage medium, wherein: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps in the method according to any one of claims 1 to 27 or the steps in the method according to any one of claims 28 to 43 are implemented.

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