SRS transmission method and apparatus, terminal device, and network device

Abstract

Embodiments of the present application provide an SRS transmission method and apparatus, a terminal device, and a network device. The method comprises: a terminal device sends SRSs on a plurality of SRS resources or a plurality of SRS resource sets, wherein the SRSs on the plurality of SRS resources or the plurality of SRS resource sets are sent by means of the same transmission mode and the same transmission resource, and have phase consistency.

Description

SRS transmission method and device, terminal equipment, and network equipment Technical Field

[0001] The embodiments of the present application relate to the field of mobile communication technology, and specifically to an SRS transmission method and apparatus, terminal equipment, and network equipment. Background Art

[0002] The network device can perform real-time channel measurement based on the Sounding Reference Signal (SRS) sent by the terminal device, thereby determining the precoding matrix used for uplink transmission and indicating it to the terminal device through the codebook, or determining the precoding matrix used for downlink transmission based on channel reciprocity. Since the channel is changing, the network device needs to configure the terminal device to perform frequent SRS transmissions so that the precoding matrix can match the current channel as much as possible, which will result in a large amount of SRS resource overhead. At the same time, the precoding matrix is ​​obtained based on the current channel measurement, and the scheduled uplink or downlink transmission is usually after several time slots, resulting in a certain lag and inaccuracy in the precoding matrix relative to the scheduled uplink or downlink transmission.

[0003] Alternatively, the terminal device can measure the time domain channel property (TDCP) based on the Tracking Reference Signal (TRS) sent by the network device, thereby providing feedback on Doppler-related time domain channel properties to the network device for use in configuring uplink and downlink transmissions. However, this approach requires a high level of measurement complexity for the terminal device and a significant amount of TRS resource overhead and feedback signaling overhead.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide an SRS transmission method and apparatus, terminal equipment, network equipment, chip, computer-readable storage medium, computer program product, and computer program.

[0006] In a first aspect, an embodiment of the present application provides an SRS transmission method, the method comprising:

[0007] The terminal device sends SRS on multiple SRS resources or multiple SRS resource sets. The SRS on the multiple SRS resources or multiple SRS resource sets use the same transmission method and the same transmission resources and have phase consistency.

[0008] In a second aspect, an embodiment of the present application provides an SRS transmission method, the method comprising:

[0009] The network device receives the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets. The SRSs on the multiple SRS resources or multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

[0010] In a third aspect, an embodiment of the present application provides an SRS transmission device, applied to a terminal device, the device comprising:

[0011] The sending unit is configured to send SRS on multiple SRS resources or multiple SRS resource sets. The SRS on the multiple SRS resources or multiple SRS resource sets adopt the same transmission mode and the same transmission resources and have phase consistency.

[0012] In a fourth aspect, an embodiment of the present application provides an SRS transmission device, applied to a network device, the device comprising:

[0013] The receiving unit is used to receive SRSs sent by a terminal device on multiple SRS resources or multiple SRS resource sets. The SRSs on the multiple SRS resources or multiple SRS resource sets use the same transmission method and the same transmission resources and have phase consistency.

[0014] In a fifth aspect, an embodiment of the present application provides a terminal device, the terminal device including a processor and a memory, the memory being used to store a computer program, the processor being used to call and execute the computer program stored in the memory to perform the above-mentioned SRS transmission method.

[0015] In a sixth aspect, an embodiment of the present application provides a network device, comprising a processor and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and execute the computer program stored in the memory to perform the above-mentioned SRS transmission method.

[0016] In a seventh aspect, an embodiment of the present application provides a chip, which includes: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned SRS transmission method.

[0017] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, it implements the above-mentioned SRS transmission method.

[0018] In a ninth aspect, an embodiment of the present application provides a computer program product, which includes computer program instructions, and the computer program instructions enable a computer to execute the above-mentioned SRS transmission method.

[0019] In a tenth aspect, the computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned SRS transmission method.

[0020] According to the technical solution of the embodiment of the present application, the terminal device uses the same transmission method and the same transmission resource to send SRS on multiple SRS resources or multiple SRS resource sets, and the SRS on multiple SRS resources or multiple SRS resource sets have phase consistency. On the one hand, based on this SRS transmission method, the network device can perform uplink channel prediction or downlink channel prediction based on SRS, thereby avoiding the terminal device from frequently performing SRS transmission due to channel changes, saving SRS resource overhead; at the same time, it can reduce the channel prediction delay and improve the accuracy of uplink channel prediction or downlink channel prediction. On the other hand, based on this SRS transmission method, the network device can perform TDCP measurement based on SRS to configure uplink and downlink transmissions, avoiding the method of performing TDCP measurement and feedback based on TRS, which not only saves the overhead of TRS resources and feedback signaling, but also reduces the implementation complexity of the terminal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application;

[0023] FIG2 is a schematic diagram of a DCI-triggered aperiodic SRS;

[0024] FIG3 is a schematic diagram of a time-frequency resource of an SRS resource;

[0025] FIG4 is a flow chart of an SRS transmission method according to an embodiment of the present application;

[0026] FIG5 is a second flow chart of an SRS transmission method provided in an embodiment of the present application;

[0027] FIG6 is a schematic diagram of a position of an SRS resource in the time domain provided in an embodiment of the present application;

[0028] FIG7 is a second schematic diagram of the position of an SRS resource in the time domain provided by an embodiment of the present application;

[0029] FIG8 is a schematic diagram of a position of an SRS resource set in the time domain provided in an embodiment of the present application;

[0030] FIG9 is a schematic diagram 1 of SRS resources within a time window provided by an embodiment of the present application;

[0031] FIG10 is a second schematic diagram of SRS resources within a time window provided by an embodiment of the present application;

[0032] FIG11 is a schematic diagram of uplink channel prediction based on an SRS on an SRS resource provided by an embodiment of the present application;

[0033] FIG12 is a flow chart of an SRS transmission method according to an embodiment of the present application;

[0034] FIG13 is a second schematic diagram of the position of an SRS resource set in the time domain provided in an embodiment of the present application;

[0035] FIG14 is a schematic diagram 1 of an SRS resource set within a time window provided by an embodiment of the present application;

[0036] FIG15 is a second schematic diagram of an SRS resource set within a time window provided in an embodiment of the present application;

[0037] FIG16 is a schematic diagram of downlink channel prediction based on an SRS on an SRS resource set provided by an embodiment of the present application;

[0038] FIG17 is a fourth flow chart of an SRS transmission method according to an embodiment of the present application;

[0039] FIG18 is a flowchart diagram 5 of an SRS transmission method provided in an embodiment of the present application;

[0040] FIG19 is a sixth flow chart of an SRS transmission method according to an embodiment of the present application;

[0041] FIG20 is a flow chart of an SRS transmission method according to an embodiment of the present application;

[0042] FIG21 is a schematic diagram of the first structure of an SRS transmission device provided in an embodiment of the present application;

[0043] FIG22 is a second schematic diagram of the structure of the SRS transmission device provided in an embodiment of the present application;

[0044] FIG23 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0045] FIG24 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0046] Figure 25 is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings 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 without making creative efforts are within the scope of protection of this application.

[0048] FIG1 is a schematic diagram of an application scenario of an embodiment of the present application.

[0049] As shown in Figure 1, a communication system 100 may include a terminal device 110 and a network device 120. The network device 120 may communicate with the terminal device 110 via an air interface. The terminal device 110 and the network device 120 support multi-service transmission.

[0050] It should be understood that the embodiments of the present application are only illustrative of the communication system 100, but the embodiments of the present application are not limited thereto. That is, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Internet of Things (IoT) system, Narrow Band Internet of Things (NB-IoT) system, enhanced Machine-Type Communications (eMTC) system, 5G communication system (also known as New Radio (NR) communication system), or future communication systems.

[0051] 1 , the network device 120 may be an access network device that communicates with the terminal device 110. The access network device may provide communication coverage for a specific geographical area and may communicate with the terminal device 110 (eg, UE) located within the coverage area.

[0052] The network device 120 may be an evolved Node B (eNB or eNodeB) in a Long Term Evolution (LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device 120 may be a relay station, an access point, an in-vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved Public Land Mobile Network (PLMN), etc.

[0053] The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wireless connection.

[0054] For example, the terminal device 110 may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolution network, etc.

[0055] The terminal device 110 can be used for device-to-device (D2D) communication.

[0056] The wireless communication system 100 may further include a core network device 130 for communicating with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (UPF), or a Session Management Function (SMF). Optionally, the core network device 130 may also be an Evolved Packet Core (EPC) device of an LTE network, such as a Session Management Function + Core Packet Gateway (SMF+PGW-C) device. It should be understood that SMF+PGW-C can simultaneously implement the functions that can be implemented by SMF and PGW-C. During the network evolution process, the above-mentioned core network device may also be called other names, or a new network entity may be formed by dividing the functions of the core network, which is not limited in the embodiments of the present application.

[0057] The functional units in the communication system 100 may also establish connections and implement communication via next generation (NG) network interfaces.

[0058] For example, the terminal device establishes an air interface connection with the access network device through the NR interface for transmitting user plane data and control plane signaling; the terminal device can establish a control plane signaling connection with the AMF through the NG interface 1 (referred to as N1); the access network device, such as the next generation wireless access base station (gNB), can establish a user plane data connection with the UPF through the NG interface 3 (referred to as N3); the access network device can establish a control plane signaling connection with the AMF through the NG interface 2 (referred to as N2); the UPF can establish a control plane signaling connection with the SMF through the NG interface 4 (referred to as N4); the UPF can exchange user plane data with the data network through the NG interface 6 (referred to as N6); the AMF can establish a control plane signaling connection with the SMF through the NG interface 11 (referred to as N11); the SMF can establish a control plane signaling connection with the PCF through the NG interface 7 (referred to as N7).

[0059] Figure 1 exemplarily shows a base station, a core network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices and each base station may include other numbers of terminal devices within its coverage area, which is not limited in this embodiment of the present application.

[0060] It should be noted that Figure 1 is merely an example of a system applicable to this application. Of course, the methods described in the embodiments of this application can also be applied to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and / or" herein simply describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " generally indicates that the associated objects are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, "A indicates B" can mean that A directly indicates B, for example, B can obtain information through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can obtain information through C; or it can mean that A and B have an association relationship. It should also be understood that the "correspondence" mentioned in the embodiments of this application can mean that there is a direct or indirect correspondence between two objects, or that there is an association relationship between the two objects, or a relationship between an indicator and the indicated, a configuration and the configured, and so on. It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit its specific implementation method. For example, predefined can refer to a definition in a protocol. It should also be understood that in the embodiments of the present application, the “protocol” can refer to a standard protocol in the field of communications, such as an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0061] To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are described below. The following relevant technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0062] Purpose of SRS

[0063] SRS is an important reference signal in the NR system and is widely used in various functions in the NR system. For example, these functions include:

[0064] Used to obtain downlink channel status information;

[0065] Used for uplink beam management;

[0066] For positioning function;

[0067] Used for codebook-based uplink transmission (including frequency-domain scheduling and rank / precoding matrix indication, as well as modulation and coding scheme determination);

[0068] Used for non-codebook based uplink transmission (including frequency domain scheduling and rank / precoding matrix indication, as well as determination of modulation and coding scheme).

[0069] The network device can configure one or more SRS resource sets (SRS Resource set) for the terminal device, and each SRS resource set can contain one or more SRS resources (SRS resource). For each SRS resource set, the network device can configure a function through high-level signaling (specifically through the usage parameter) to indicate the purpose of the SRS resource set, so that the terminal device can adopt the transmission method and transmission resources corresponding to the purpose specified in the protocol. The usage currently supported in the protocol can be configured as: codeBook (for codebook-based uplink transmission), nonCodebook (for non-codebook-based uplink transmission), antennaSwitching (for obtaining downlink channel state information), beamManagement (for uplink beam management).

[0070] SRS periodicity

[0071] According to the periodicity of SRS transmission, SRS can be divided into periodic SRS, semi-persistent SRS, and aperiodic SRS. The details are as follows:

[0072] 1. Periodic SRS and semi-continuous SRS

[0073] Periodic SRS refers to SRS that is transmitted periodically, and its period and time slot offset are configured by Radio Resource Control (RRC) signaling. Once the terminal device receives the corresponding RRC configuration, it sends SRS according to a certain period until the RRC configuration becomes invalid. The spatial related information of the periodic SRS (used to determine the transmission beam) is also configured by RRC signaling. The spatial related information can indicate a Channel State Information-Reference Signal (CSI-RS), a synchronization signal block (SSB) or a reference SRS. The terminal device determines the transmission beam of the target SRS resource based on the receiving beam of the CSI-RS / SSB indicated by the spatial related information, or determines the transmission beam of the target SRS resource based on the transmission beam of the reference SRS resource. It should be noted that the SRS resource where the periodic SRS is located can be called a periodic SRS resource.

[0074] Semi-persistent SRS is also a periodically transmitted SRS, whose period and time slot offset are configured by RRC signaling, but its activation and deactivation signaling are carried by the Media Access Control Control Element (MAC CE). After receiving the activation signaling, the terminal device starts to transmit the SRS periodically until it receives the deactivation signaling. The spatial related information of the semi-persistent SRS (used to determine the transmit beam) is carried together with the MAC CE that activates the SRS. The spatial related information can indicate a CSI-RS, SSB or reference SRS. The terminal device determines the transmit beam of the target SRS resource according to the receive beam of the CSI-RS / SSB indicated by the spatial related information, or determines the transmit beam of the target SRS resource according to the transmit beam of the reference SRS resource. It should be noted that the SRS resource where the semi-persistent SRS is located can be called a semi-persistent SRS resource.

[0075] After receiving the period and time slot offset configured by RRC signaling, the terminal device can determine the time slot that can be used to transmit SRS according to the following formula:

[0076] in, Represents the number of time slots contained in a wireless frame, T SRS The period configured for RRC signaling, T offset The timeslot offset configured for RRC signaling, n f and are the radio frame number and time slot number used to transmit SRS respectively.

[0077] 2. Aperiodic SRS

[0078] Aperiodic SRS refers to SRS that is transmitted aperiodically, and the network device can trigger the aperiodic SRS transmission of the terminal device through trigger signaling. The trigger signaling used to trigger the aperiodic SRS transmission can be carried by downlink control information (DCI). On the one hand, the trigger signaling used to trigger the aperiodic SRS transmission (which can be called SRS trigger signaling) can be carried by uplink DCI, or by downlink DCI. Uplink DCI refers to DCI that schedules uplink transmission, and downlink DCI refers to DCI that schedules downlink transmission. Uplink transmission can be physical uplink shared channel (PUSCH) transmission, and downlink transmission can be physical downlink shared channel (PDSCH) transmission. On the other hand, the trigger signaling used to trigger the aperiodic SRS transmission can be carried by the DCI used to schedule PUSCH / PDSCH in the UE-specific search space, or by DCI format 2_3 in the common search space. Among them, DCI format 2_3 can not only be used to trigger non-periodic SRS transmission, but also can be used to configure the transmit power control (TPC) command of SRS on a group of terminal devices or a group of carriers. SRS trigger signaling can be implemented through the SRS request field (SRS request field) in DCI. For example, the following Table 1 gives the meanings corresponding to different values ​​of the SRS request field. There is a correspondence between the SRS resource set and the value of the high-level parameter aperiodicSRS-ResourceTrigger. Therefore, the corresponding SRS resource set can be determined according to the value of the high-level parameter aperiodicSRS-ResourceTrigger:

[0079] Table 1: SRS trigger signaling

[0080] After the terminal device receives the trigger signaling (such as DCI) of the non-periodic SRS, it transmits the SRS on the SRS resource set indicated by the trigger signaling. The slot offset between the trigger signaling and the SRS transmission is configured by high-level signaling (such as RRC signaling). The network device pre-indicates the configuration parameters of each SRS resource set of the terminal device through high-level signaling, including time-frequency resources, sequence parameters, power control parameters, etc. In addition, for each SRS resource in the triggered SRS resource set, the terminal device can also determine the transmit beam used to transmit the SRS on the SRS resource through the spatial related information of the SRS resource. This information is configured to each SRS resource through RRC signaling.

[0081] Among them, for the slot offset (slot offset), as shown in Figure 2, if the terminal device receives the DCI that triggers the aperiodic SRS in the time slot n, the terminal device will SRS is sent on the SRS resources in the SRS resource set, where k is indicated by the parameter slotOffset configured for the SRS resource set, and μ SRS and μ PDCCH They are respectively the subcarrier spacing configuration of the SRS triggered by the trigger command and the subcarrier spacing configuration of the physical downlink control channel (Physical Downlink Control Channel, PDCCH) where the trigger command is located. In the example shown in Figure 2, slotOffset=3.

[0082] Multi-symbol SRS transmission

[0083] In the NR system, an SRS resource can be transmitted on multiple consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols, for example, on the last N (N ≥ 1) OFDM symbols in a time slot. The terminal device transmits all SRS antenna ports on each OFDM symbol, but the physical resources used in different OFDM symbols can be different. The SRS on different OFDM symbols can have different transmission modes, that is, multiple consecutive OFDM symbols can have different uses. For example, when the network side requires a broadband sounding signal, the terminal device can be configured to perform frequency hopping on multiple OFDM symbols; if the current SRS is used for receive beam selection (only for high frequencies), the terminal device can use the same transmit beam to transmit the SRS on multiple OFDM symbols, and the network side can use different receive beams for reception on different OFDM symbols to determine the best receive beam; if the current SRS signal coverage is limited, the SRS coverage can be improved by repeatedly transmitting the same SRS on multiple OFDM symbols. The network device can configure SRS for one or more purposes on multiple OFDM symbols occupied by an SRS resource. For example, an SRS resource occupies 8 OFDM symbols, where every two OFDM symbols are repeated (repetition), and a total of 4 groups of frequency hopping are performed (where the frequency domain resources occupied by the repeated transmissions are the same), as shown in Figure 3.

[0084] In related technologies, network devices can perform real-time channel measurements based on the SRS sent by terminal devices to determine the precoding matrix used for uplink transmission and indicate it to the terminal device through a codebook, or determine the precoding matrix used for downlink transmission based on channel reciprocity. Because the channel is changing, the network device needs to configure the terminal device to perform frequent SRS transmissions so that the precoding matrix can match the current channel as much as possible, which will result in a large amount of SRS resource overhead. At the same time, the precoding matrix is ​​obtained based on the current channel measurement, and the scheduled uplink or downlink transmission is usually several time slots later, resulting in a certain lag and inaccuracy in the precoding matrix relative to the scheduled uplink or downlink transmission. On the other hand, the protocol introduces TRS-based TDCP measurement. The terminal device can perform TDCP measurement based on the TRS sent by the network device, thereby feeding back Doppler-related time domain channel characteristics (such as the time domain channel correlation matrix, time domain Doppler parameters, etc.) to the network device. This is used for the network device to configure uplink and downlink transmissions (such as reference signal configuration or CSI feedback configuration) to match the changing speed of the channel. However, this approach requires the introduction of higher terminal device measurement complexity, as well as a large amount of TRS resource overhead and CSI feedback signaling overhead.

[0085] To this end, the technical solutions of the embodiments of the present application are proposed. To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0086] It should be noted that the “symbol” described in the embodiments of the present application may be an OFDM symbol.

[0087] FIG4 is a flow chart of an SRS transmission method provided in an embodiment of the present application. As shown in FIG4 , the method includes one or more of the following steps:

[0088] Step 401: The terminal device transmits SRS on multiple SRS resources or multiple SRS resource sets. The SRS on the multiple SRS resources or multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

[0089] Step 402: The network device receives SRSs sent by the terminal device on multiple SRS resources or multiple SRS resource sets. The SRSs on the multiple SRS resources or multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

[0090] In some embodiments, the terminal device may transmit an SRS on multiple SRS resources, where the SRSs on the multiple SRS resources use the same transmission mode and the same transmission resources and have phase consistency. In other embodiments, the terminal device may transmit an SRS on multiple SRS resource sets, where the SRSs on the multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

[0091] It should be noted that the terminal device can also send SRS on an SRS resource set, which includes multiple SRS resources. Therefore, this situation can also be understood as the terminal device sending SRS on multiple SRS resources. The SRS on multiple SRS resources use the same transmission method and the same transmission resources, and have phase consistency.

[0092] Before sending SRS on multiple SRS resources or multiple SRS resource sets, the terminal device needs to obtain configuration information of the multiple SRS resources or multiple SRS resource sets.

[0093] In some embodiments, the network device sends first configuration information to the terminal device; accordingly, the terminal device receives the first configuration information sent by the network device; the first configuration information is used to configure multiple SRS resources or multiple SRS resource sets, or in other words, the first configuration information includes configuration information of multiple SRS resources or multiple SRS resource sets; wherein the multiple SRS resources or multiple SRS resource sets are configured with the same transmission mode, the same transmission resources and the same purpose.

[0094] It should be noted that the transmission mode, transmission resources, and functions of an SRS resource can also be understood as the transmission mode, transmission resources, and functions of the SRS transmitted on that SRS resource. The transmission mode, transmission resources, and functions of an SRS resource set can also be understood as the transmission mode, transmission resources, and functions of the SRS transmitted on that SRS resource set. In some cases, the descriptions of "SRS resource" and "SRS" can be used interchangeably.

[0095] In some implementations, the first configuration information for configuring multiple SRS resources or multiple SRS resource sets (or the configuration information of multiple SRS resources or multiple SRS resource sets) is carried in high-layer signaling, which may be RRC signaling.

[0096] In an embodiment of the present application, for each of a plurality of SRS resources, the configuration information of the SRS resource may include the transmission mode, transmission resources, and usage of the SRS resource, but is not limited thereto. Optionally, it may also include other information, such as the resource type of the SRS resource, and the resource type may be configured as aperiodic, semi-persistent, or periodic. For each of a plurality of SRS resource sets, the configuration information of the SRS resource set includes the configuration information of each SRS resource within the SRS resource set, and the configuration information of each SRS resource may include the transmission mode, transmission resources, and usage of the SRS resource, but is not limited thereto. Optionally, it may also include other information, such as the resource type of the SRS resource, and the resource type may be configured as aperiodic, semi-persistent, or periodic.

[0097] In the embodiments of the present application, multiple SRS resources or multiple SRS resource sets are configured with the same transmission mode, the same transmission resources, and the same purpose. The terminal device transmits SRSs on the multiple SRS resources or multiple SRS resource sets using the same transmission mode and the same transmission resources, and the SRSs transmitted on the multiple SRS resources or multiple SRS resource sets have phase consistency.

[0098] In some embodiments, the above-mentioned same transmission mode includes at least one of the following: the same transmission power; the same power control parameter; the same spatial correlation parameter; the same number of antenna ports; the same antenna port.

[0099] Here, "same transmit power" and "same power control parameters" can be replaced with each other. For example, the terminal device uses the same power control parameters to send SRS on multiple SRS resources or multiple SRS resource sets, which can be replaced by the terminal device using the same transmit power to send SRS on multiple SRS resources or multiple SRS resource sets.

[0100] In some implementations, the power control parameters include one or more of the following: open-loop power control parameters, a path loss reference signal, and closed-loop power control parameters. For example, the open-loop power control parameters may include a target power Po and a path loss factor α; the closed-loop power control parameters may include a power adjustment state index l.

[0101] In some implementations, the transmit power may be determined based on a power control parameter. For example, the transmit power of the SRS may be determined based on the following formula:

[0102] The following describes the parameters involved in the above formula, which can be considered as power control parameters.

[0103] P CMAX,f,c (i) represents the maximum transmit power configured for the terminal device on carrier f, serving cell c, and SRS transmission time slot i;

[0104] P o_SRS,b,f,c (q s ) indicates that on carrier f, BWP b, serving cell c, SRS resource set q s The configured Po value;

[0105] M SRS,b,f,c (i) represents the number of SRS RBs configured in transmit time slot i on carrier f, BWP b, serving cell c;

[0106] α SRS,b,f,c (q s ) indicates that on carrier f, BWP b, serving cell c, SRS resource set q s The configured alpha value (i.e., path loss factor);

[0107] PL b,f,c (q d ) indicates that on carrier f, BWP b, serving cell c, SRS resource set q d Calculate path loss based on the configured reference signal;

[0108] h b,f,c (i, l) represents the power adjustment value of power adjustment state l on carrier f, BWP b, serving cell c, and SRS transmission time slot i.

[0109] Here, the "spatial-related parameter" can also be described as "spatial-related information". The spatial-related parameter can indicate a CSI-RS, an SSB, a reference SRS or a transmission configuration indication (TCI) state. The terminal device determines the transmit beam of the target SRS resource based on the receive beam of the CSI-RS / SSB indicated by the spatial-related parameter, or the terminal device determines the transmit beam of the target SRS resource based on the transmit beam of the reference SRS resource, or the terminal device determines the transmit beam of the target SRS resource based on the indication of the TCI state. Among them, the receive beam can also be replaced by the description of the spatial receive filter, and the transmit beam can also be replaced by the description of the spatial transmit filter.

[0110] In some implementations, the same transmission resource includes at least one of the following: the same symbol index; the same frequency domain resource; the same frequency hopping configuration; the same cyclic shift; and the same SRS base sequence.

[0111] Here, the same symbol index can be understood as the same symbol index for SRSs transmitted on multiple SRS resources or multiple SRS resource sets. For example, the symbol index can be determined by configuring the following parameters: symbol starting position and symbol number.

[0112] Here, the same frequency domain resources can be understood as the same frequency domain resources where the SRSs transmitted on multiple SRS resources or multiple SRS resource sets are located. Exemplarily, the frequency domain resources can be determined by configuring the following parameters: frequency band, PRB, comb structure, and comb offset.

[0113] Here, the same frequency hopping configuration may be understood as that the SRSs transmitted on multiple SRS resources or multiple SRS resource sets use the same frequency hopping parameters.

[0114] Here, the same cyclic shift can be understood as that the SRSs transmitted on multiple SRS resources or multiple SRS resource sets adopt the same cyclic shift.

[0115] Here, the same SRS base sequence can be understood as that the SRSs transmitted on multiple SRS resources or multiple SRS resource sets use the same SRS base sequence.

[0116] In some embodiments, the above-mentioned uses include at least one of the following: channel prediction (channelPrediction), downlink channel prediction (DLchannelPrediction), uplink channel prediction (ULchannelPrediction), TDCP measurement and antenna switching (antennaSwitching).

[0117] Here, channel prediction can be understood as uplink channel prediction, downlink channel prediction, or uplink channel prediction and downlink channel prediction according to protocol agreement.

[0118] In some implementations, the SRSs sent on the multiple SRS resources or multiple SRS resource sets have phase consistency and may be replaced by other essentially the same descriptions. For example, the replaceable descriptions include the following:

[0119] Alternative description 1: SRSs transmitted on multiple SRS resources or multiple SRS resource sets are coherent.

[0120] Alternative description 2: The relative phase variation between SRSs sent on multiple SRS resources or multiple SRS resource sets is within a certain range.

[0121] Alternative description 3: During the transmission of SRS on multiple SRS resources or multiple SRS resource sets, the relative phase change of the transmitting antenna of the terminal device is within a certain range.

[0122] That is, the network device may assume that the SRSs sent on multiple SRS resources or multiple SRS resource sets are sent through the same antenna port.

[0123] For example, if the sequences of the SRS sent on the first SRS resource and the SRS sent on the second SRS resource are exactly the same, and the relative phase changes of the transmitting antennas of these SRSs are within a certain range, then these SRSs can be said to have phase consistency, or be coherent.

[0124] For example, if the sequences of the SRS sent on the first SRS resource set (which may include one or more SRS resources) and the SRS sent on the second SRS resource set (which may include one or more SRS resources) are exactly the same, and the relative phase changes between these SRSs are within a certain range, then these SRSs can be said to be phase consistent, or coherent.

[0125] It should be noted that the relative phase change can also be understood as a change in phase difference. The relative phase change refers to the relative phase change of the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets.

[0126] In some implementations, the above-mentioned phase consistency indicator (or requirement) may be defined by a protocol or configured by a network device. The phase consistency indicator may be defined by a threshold p, or by a duration t and a threshold p.

[0127] Exemplarily, the phase consistency indicator may be: if the relative phase change does not exceed a threshold p, the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied.

[0128] Exemplarily, the phase consistency indicator may be: if the relative phase variation within duration t does not exceed a threshold p, then the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied. For example, if the relative phase variation of a signal transmitted by a transmitting antenna of a terminal device within duration t does not exceed a threshold value p, then the signal satisfies the phase consistency indicator and is therefore phase consistent; otherwise, the signal is not phase consistent.

[0129] In some embodiments, the terminal device sends terminal capability information to the network device, where the terminal capability information indicates the maximum time length for which the terminal device can maintain phase consistency. Correspondingly, the network device receives the terminal capability information sent by the terminal device, where the terminal capability information indicates the maximum time length for which the terminal device can maintain phase consistency.

[0130] In some embodiments, if the maximum length of time that the terminal device can maintain phase consistency, as indicated by the terminal capability information sent by the terminal device to the network device, is a specific value, such as 1, it indicates that the terminal device does not support phase consistency. In this case, the network device will not configure the SRS resource or SRS resource set in the embodiment of the present application for the terminal device for uplink channel prediction or downlink channel prediction or TDCP measurement.

[0131] Exemplarily, the maximum time length may be expressed in time slots, or in symbols (such as OFDM symbols), or in ms.

[0132] In some embodiments, the terminal device does not expect the duration length (or total duration length) corresponding to multiple SRS resources or multiple SRS resource sets to exceed the maximum time length for which the terminal device can maintain phase consistency. It will be understood that if the duration length corresponding to multiple SRS resources or multiple SRS resource sets does not exceed the maximum time length for which the terminal device can maintain phase consistency, then the capabilities of the terminal device support phase consistency of the SRSs sent on multiple SRS resources or multiple SRS resource sets.

[0133] In some embodiments, a network device sends first indication information to a terminal device, where the first indication information is used to indicate a first time length, where the first time length is the time length for which the terminal device needs to maintain phase consistency or the time length for which the network device measures an SRS. Accordingly, the terminal device receives the first indication information sent by the network device, where the first indication information is used to indicate the first time length, and the terminal device maintains phase consistency for SRSs sent by multiple SRS resources or multiple SRS resource sets within the first time length.

[0134] Exemplarily, the first indication information may be carried in higher layer signaling (such as RRC signaling) or DCI.

[0135] Exemplarily, the first time length may be measured in time slots, or in symbols (such as OFDM symbols), or in ms.

[0136] In some embodiments, the first time length is less than or equal to the maximum time length that the terminal device can maintain phase consistency, or in other words, the first time length is less than or equal to the maximum time length that the terminal device can maintain phase consistency reported.

[0137] In some implementations, the terminal device maintains phase consistency of SRSs sent on multiple SRS resources or multiple SRS resource sets within a first time length, which can be implemented as follows:

[0138] Method 1: The terminal device maintains phase consistency of SRSs sent on multiple SRS resources or multiple SRS resource sets within any time window having a first time length.

[0139] For the first approach, the time domain positions of the time windows having the first time length are arbitrary, and different time windows may not overlap at all or may partially overlap. In the case where different time windows do not overlap at all, different time windows may be immediately adjacent or spaced apart.

[0140] Method 2: The terminal device maintains phase consistency of SRSs sent on multiple SRS resources or multiple SRS resource sets within each time window of a first time length starting from a first time domain position, where the first time domain position is determined based on a first time domain offset. The first time domain offset is configured by a network device, defined by a protocol, or preconfigured.

[0141] The first time domain offset may be a slot offset or a symbol offset. The symbol offset may be an OFDM symbol offset.

[0142] In the second approach, the time domain positions of time windows having a length of the first time length are periodic, and the period can be the same as or different from the first time length. If the period is the same as the first time length, the time windows within adjacent periods are adjacent. If the period is greater than the first time length, the time windows within adjacent periods are spaced apart.

[0143] In an embodiment of the present application, the SRS resources among the above-mentioned multiple SRS resources may be aperiodic SRS resources, periodic SRS resources, or semi-persistent SRS resources. The SRS resource sets among the above-mentioned multiple SRS resource sets may be aperiodic SRS resource sets, periodic SRS resource sets, or semi-persistent SRS resource sets. Here, the aperiodic SRS resource set refers to an SRS resource set including aperiodic SRS resources, the periodic SRS resource set refers to an SRS resource set including periodic SRS resources, and the semi-persistent SRS resource set refers to an SRS resource set including semi-persistent SRS resources.

[0144] The implementation of the above-mentioned multiple SRS resources is described below.

[0145] In some implementations, the SRS resources among the multiple SRS resources are aperiodic SRS resources triggered by the same signaling. Exemplarily, the signaling may be DCI.

[0146] In some cases, the same signaling is also used to schedule a PUSCH, and the SRSs on the multiple SRS resources are used to predict the channel state information of the PUSCH. In other cases, the same signaling is also used to schedule a PDSCH, and the SRSs on the multiple SRS resources are used to predict the channel state information of the PDSCH.

[0147] In some implementations, the DCI used to trigger aperiodic SRS resources can be the DCI used to schedule PUSCH / PDSCH in the UE-specific search space (i.e., DCI format 0_1, 1_0), or the DCI format 2_3 in the common search space. DCI format 2_3 can be used not only to trigger aperiodic SRS resources, but also to configure TPC commands for SRS on a group of terminal devices or a group of carriers.

[0148] In some implementations, aperiodic SRS resources can be triggered via an SRS request field in the DCI. The length of the SRS request field is X bits, exemplarily X=2 or X=3. The value of the X bit of the SRS request field can indicate the triggered SRS resource, specifically, which SRS resources configured by the network device through RRC signaling are triggered. Taking the SRS request field length as an example of 2 bits, the meanings corresponding to different values ​​of the SRS request field are given in Table 1 above.

[0149] In other implementations, the SRS resources among the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period.

[0150] In some implementations, two adjacent SRS resources among the multiple SRS resources are separated by the same number of symbols or the same number of time slots in the time domain. Here, the symbol may be an OFDM symbol.

[0151] Exemplarily, the above number of symbols is configured by the network device or defined by the protocol or pre-configured.

[0152] Exemplarily, the above-mentioned number of time slots is configured by the network device or defined by the protocol or pre-configured.

[0153] The implementation of the above-mentioned multiple SRS resource sets is described below.

[0154] In some implementations, the SRS resource sets in the multiple SRS resource sets are aperiodic SRS resource sets triggered by the same signaling. Exemplarily, the signaling may be DCI.

[0155] In some cases, the same signaling is also used to schedule a PUSCH, and the SRSs on the multiple SRS resource sets are used to predict the channel state information of the PUSCH. In other cases, the same signaling is also used to schedule a PDSCH, and the SRSs on the multiple SRS resource sets are used to predict the channel state information of the PDSCH.

[0156] In some implementations, the DCI used to trigger the aperiodic SRS resource set can be the DCI used to schedule PUSCH / PDSCH in the UE-specific search space (i.e., DCI format 0_1, 1_0), or it can be DCI format 2_3 in the common search space. DCI format 2_3 can be used not only to trigger the aperiodic SRS resource set, but also to configure TPC commands for SRS on a group of terminal devices or a group of carriers.

[0157] In some implementations, a non-periodic SRS resource set can be triggered via an SRS request field in the DCI. The length of the SRS request field is X bits, exemplarily, X=2 or X=3. The value of the X bit of the SRS request field can indicate the triggered SRS resource set, specifically, indicating which SRS resource sets configured by the network device through RRC signaling are triggered. Taking the SRS request field length of 2 bits as an example, the meanings corresponding to different values ​​of the SRS request field are given in Table 1 above.

[0158] In other implementations, the SRS resource sets in the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period.

[0159] In some implementations, two adjacent SRS resource sets in the plurality of SRS resource sets are separated in the time domain by the same number of symbols or the same number of time slots. Here, the symbol may be an OFDM symbol.

[0160] Exemplarily, the above number of symbols is configured by the network device or defined by the protocol or pre-configured.

[0161] Exemplarily, the above-mentioned number of time slots is configured by the network device or defined by the protocol or pre-configured.

[0162] Through the above scheme, after the network device receives the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets, further, in some embodiments, the network device performs at least one of the following based on the received SRS: uplink channel state information prediction, downlink channel state information prediction, and TDCP measurement.

[0163] Here, the purpose of multiple SRS resources or multiple SRS resource sets is related to the operation performed by the network device based on the received SRS. For example: if the purpose of multiple SRS resources or multiple SRS resource sets is "channel prediction" or "uplink channel prediction", the network device performs uplink channel state information prediction based on the received SRS. For example: if the purpose of multiple SRS resources or multiple SRS resource sets is "antenna switching" or "channel prediction" or "downlink channel prediction", the network device performs downlink channel state information prediction based on the received SRS. For example: if the purpose of multiple SRS resources or multiple SRS resource sets is "TDCP measurement (TDCP for short)", the network device performs TDCP measurement based on the received SRS.

[0164] According to the technical solution of the embodiment of the present application, the terminal device uses the same transmission mode and transmission resources to send SRS on multiple SRS resources or SRS resource sets configured by the network device, and the sent SRS has phase consistency. The network device can predict the uplink channel state information based on the received SRS, or predict the downlink channel state information, or perform TDCP measurement, thereby avoiding the terminal device from frequently performing SRS transmission due to channel changes, saving SRS resource overhead; at the same time, it can reduce the channel prediction delay and improve the accuracy of uplink channel prediction or downlink channel prediction. On the other hand, based on the SRS transmission method of the present application, the network device can perform TDCP measurement based on SRS, thereby configuring uplink and downlink transmissions, avoiding the method of performing TDCP measurement and feedback based on TRS, saving TRS resource and feedback signaling overhead, and reducing the implementation complexity of the terminal device.

[0165] The following describes the technical solutions of the embodiments of the present application with reference to specific application examples. In the following application example 1, multiple SRS resources or SRSs on an SRS resource set are used for uplink channel prediction (i.e., uplink channel state information prediction); in the following application example 2, multiple SRS resources or SRSs on an SRS resource set are used for downlink channel prediction (i.e., downlink channel state information prediction); and in the following application example 3, multiple SRS resources or SRSs on an SRS resource set are used for TDCP measurement.

[0166] Application Example 1

[0167] In this application example, SRSs on multiple SRS resources or an SRS resource set are used for uplink channel prediction (i.e., uplink channel state information prediction). As shown in FIG5 , this application example includes one or more of the following steps:

[0168] Step 501: The network device configures multiple SRS resources or multiple SRS resource sets, wherein the multiple SRS resources or SRS resource sets are configured with the same transmission mode, the same transmission resources and the same usage.

[0169] Step 502: The terminal device receives multiple SRS resources or multiple SRS resource sets configured by the network device.

[0170] Step 503: The terminal device sends SRS on multiple SRS resources or multiple SRS resource sets, wherein the SRS sent on the multiple SRS resources or multiple SRS resource sets adopt the same transmission mode and the same transmission resources and have phase consistency.

[0171] The following describes the same transmission method:

[0172] In some implementations, when a network device is configured with multiple SRS resources, the SRSs on the multiple SRS resources use the same transmission method, including at least one of the following:

[0173] 1. The SRSs on multiple SRS resources use the same transmission power.

[0174] Here, the network device configures the same power control parameters for multiple SRS resources, and the terminal device transmits SRSs using the same transmission power on the multiple SRS resources according to the configuration of the network device.

[0175] 2. The SRSs on multiple SRS resources use the same transmission beam (which can also be described as a spatial transmission filter).

[0176] Here, the network device configures the same spatial-related parameters (or spatial-related information) or the same TCI state for multiple SRS resources, and the terminal device uses the same transmission beam (also described as a spatial transmission filter) to send SRS on multiple SRS resources according to the configuration of the network device.

[0177] 3. The SRSs on multiple SRS resources use the same number of antenna ports.

[0178] Here, the network device configures the same number of antenna ports for multiple SRS resources, and the terminal device uses the same number of antenna ports to send SRS on the multiple SRS resources according to the configuration of the network device.

[0179] 4. The SRSs on multiple SRS resources use the same antenna port.

[0180] Here, the network device configures the same antenna port for multiple SRS resources, and the terminal device uses the same antenna port to transmit SRS on multiple SRS resources based on the network device's configuration. In other words, the terminal device uses the same antenna port to transmit SRS on different SRS resources; the network device can assume that the precoding matrix / beam used by the SRS sent on different SRS resources is exactly the same.

[0181] Exemplarily, the SRSs on multiple SRS resources adopting the same transmission mode may be: the SRSs on multiple SRS resources adopt the same transmission power, the same transmission beam and the same number of antenna ports.

[0182] Exemplarily, the SRSs on multiple SRS resources adopting the same transmission mode may be: the SRSs on multiple SRS resources adopt the same transmission power, the same transmission beam and the same antenna port.

[0183] The above examples are only for illustration, and the technical solutions of the embodiments of the present application may also have other combinations.

[0184] In some implementations, when a network device is configured with multiple SRS resource sets, the SRSs on the multiple SRS resource sets use the same transmission method, including at least one of the following:

[0185] 1. The SRSs on multiple SRS resource sets use the same transmission power.

[0186] Here, the network device configures the same power control parameters for multiple SRS resource sets, and the terminal device transmits SRS using the same transmission power on the multiple SRS resource sets according to the configuration of the network device.

[0187] 2. The SRSs on multiple SRS resource sets use the same transmission beam (which can also be described as a spatial transmission filter).

[0188] Here, the network device configures the SRS resources in multiple SRS resource sets with the same spatial-related parameters (or spatial-related information) or the same TCI state, and the terminal device uses the same transmit beam (also described as a spatial transmission filter) to transmit SRS on multiple SRS resource sets based on the configuration of the network device. Optionally, the network device can also configure the SRS resources in multiple SRS resource sets with the same associated CSI-RS, so that the terminal device can determine the same precoding matrix and transmit beam (also described as a spatial transmission filter) for the SRS resources in the SRS resource set based on the same associated CSI-RS.

[0189] 3. The SRSs on multiple SRS resource sets use the same number of antenna ports.

[0190] Here, the network device configures the same number of antenna ports for the SRS resources in multiple SRS resource sets, and the terminal device uses the same number of antenna ports to send SRS on the multiple SRS resource sets according to the configuration of the network device.

[0191] 4. The SRSs on multiple SRS resource sets use the same antenna port.

[0192] Here, the network device configures the same antenna port for the SRS resources in multiple SRS resource sets. The terminal device uses the same antenna port to transmit SRS on multiple SRS resource sets based on the network device's configuration. In other words, the terminal device uses the same antenna port to transmit SRS on different SRS resource sets; the network device can assume that the precoding matrix / beam used by the SRS sent on different SRS resource sets is exactly the same.

[0193] Exemplarily, the SRSs on multiple SRS resource sets adopting the same transmission mode may be: the SRSs on multiple SRS resource sets adopt the same transmission power, the same transmission beam and the same number of antenna ports.

[0194] Exemplarily, the SRSs on multiple SRS resource sets adopting the same transmission mode may be: the SRSs on multiple SRS resource sets adopt the same transmission power, the same transmission beam and the same antenna port.

[0195] The above examples are only for illustration, and the technical solutions of the embodiments of the present application may also have other combinations.

[0196] The following describes the same transmission resources:

[0197] In some implementations, when a network device is configured with multiple SRS resources, the SRSs on the multiple SRS resources use the same transmission resource, including at least one of the following:

[0198] 1. The SRSs on multiple SRS resources use the same OFDM symbol index.

[0199] Here, the network device configures the same OFDM symbol index for multiple SRS resources. For example, the network device can configure the same symbol starting position and number of OFDM symbols for multiple SRS resources, thereby configuring the same OFDM symbol index. The terminal device uses the same OFDM symbol index to send SRS on multiple SRS resources based on the configuration of the network device.

[0200] 2. The SRSs on multiple SRS resources use the same frequency domain resources.

[0201] Here, the network device configures the same frequency domain resources for multiple SRS resources. For example, the network device can configure the same frequency band, the same PRB, the same comb structure, the same comb offset, etc. for multiple SRS resources, thereby achieving the same configuration of frequency domain resources. The terminal device uses the same frequency domain resources to send SRS on multiple SRS resources based on the configuration of the network device.

[0202] 3. The SRSs on multiple SRS resources use the same frequency hopping configuration.

[0203] Here, the network device configures the same frequency hopping parameters for multiple SRS resources. The terminal device transmits SRS using the same frequency hopping configuration on multiple SRS resources according to the configuration of the network device.

[0204] Exemplarily, the SRSs on multiple SRS resources using the same transmission resource may be: the SRSs on multiple SRS resources using the same OFDM symbol index and the same frequency domain resource.

[0205] Exemplarily, the SRSs on multiple SRS resources using the same transmission resource may be: the SRSs on multiple SRS resources using the same OFDM symbol index, the same frequency domain resource, and the same frequency hopping configuration.

[0206] The above examples are only for illustration, and the technical solutions of the embodiments of the present application may also have other combinations.

[0207] In some implementations, when a network device is configured with multiple SRS resource sets, the SRSs on the multiple SRS resource sets use the same transmission resource, including at least one of the following:

[0208] 1. The SRSs in multiple SRS resource sets use the same OFDM symbol index.

[0209] Here, the network device configures the same OFDM symbol index for the SRS resources in multiple SRS resource sets. For example, the network device can configure the same symbol starting position and number of OFDM symbols, thereby achieving the same OFDM symbol index. The terminal device uses the same OFDM symbol index to send SRS on multiple SRS resource sets based on the configuration of the network device.

[0210] 2. The SRSs on multiple SRS resource sets use the same frequency domain resources.

[0211] Here, the network device configures the same frequency domain resources for the SRS resources in multiple SRS resource sets. For example, the network device can configure the same frequency band, the same PRB, the same comb structure, the same comb offset, etc., thereby configuring the same frequency domain resources. The terminal device uses the same frequency domain resources to send SRS on multiple SRS resource sets based on the configuration of the network device.

[0212] 3. The SRSs on multiple SRS resource sets use the same frequency hopping configuration.

[0213] Here, the network device configures the same frequency hopping parameters for the SRS resources in the multiple SRS resource sets. The terminal device transmits SRSs using the same frequency hopping configuration on the multiple SRS resource sets according to the configuration of the network device.

[0214] Exemplarily, the SRSs on multiple SRS resource sets using the same transmission resources may be: the SRSs on multiple SRS resource sets using the same OFDM symbol index and the same frequency domain resources.

[0215] Exemplarily, the SRSs on multiple SRS resource sets using the same transmission resources may be: the SRSs on multiple SRS resource sets using the same OFDM symbol index, the same frequency domain resources, and the same frequency hopping configuration.

[0216] The technical solution of the embodiment of the present application is that when multiple SRS resources or SRSs on multiple SRS resource sets use the same transmission mode and transmission resources, the network device can accurately predict the uplink channel based on these SRSs and obtain the uplink channel state information (such as the precoding matrix) corresponding to a certain time in the future. If the transmission mode or transmission resources are different, the accuracy of the channel prediction will be seriously deteriorated.

[0217] The following describes the same usage:

[0218] In some implementations, for multiple SRS resources or multiple SRS resource sets configured by a network device, the multiple SRS resources or the multiple SRS resource sets are configured with the same usage.

[0219] In some implementations, the network device configures the same usage for multiple SRS resources or multiple SRS resource sets through higher layer signaling.

[0220] For example, for the aforementioned multiple SRS resources or multiple SRS resource sets, the network device may define a new usage, thereby distinguishing it from the usage configuration supported in the existing protocol. For example, the usage of multiple SRS resources or multiple SRS resource sets may be configured as "channel prediction" or "uplink channel prediction."

[0221] In some embodiments, multiple SRS resources or multiple SRS resource sets are aperiodic SRS resources or aperiodic SRS resource sets triggered by the same DCI. That is, the aperiodic trigger states corresponding to these SRS resources or SRS resource sets are the same. For example, as shown in Figures 6 and 8, in Figure 6, four SRS resources are aperiodic SRS resources triggered by one DCI, and in Figure 8, three SRS resource sets are aperiodic SRS resource sets triggered by the same DCI. In this case, the SRSs transmitted on a DCI-triggered aperiodic SRS resource or SRS resource set have phase consistency.

[0222] In other embodiments, the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period, or the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period. As shown in FIG7 , the three SRS resources are all periodic SRS resources with a period of T.

[0223] In some embodiments, multiple SRS resources or multiple SRS resource sets are spaced apart by the same number of symbols or the same number of time slots in the time domain. Here, the same number of time slots can be achieved by configuring the time slot offset of the SRS resources or configuring the triggering time slot offset of the SRS resource set by the network device. For example, multiple SRS resources can be spaced apart by k symbols, as shown in Figure 6. For example, multiple SRS resources can be spaced apart by m time slots, as shown in Figure 7. For example, multiple SRS resource sets can be spaced apart by n time slots, as shown in Figure 8. That is, in Figure 8, the time slot offsets of the three SRS resource sets triggered by the DCI are j, n+j, and 2n+j, respectively.

[0224] In the above example, the values ​​of k / m / n can be indicated by the network device to the terminal device, and their value ranges can be pre-agreed. For example, the values ​​of m and n can range from 1 to 2, where 1 indicates adjacent time slots and 2 indicates one time slot apart.

[0225] The following explains phase consistency.

[0226] In some implementations, the SRSs sent on the multiple SRS resources or multiple SRS resource sets have phase consistency and may be replaced by other essentially the same descriptions. For example, the replaceable descriptions include the following:

[0227] Alternative description 1: SRSs transmitted on multiple SRS resources or multiple SRS resource sets are coherent.

[0228] Alternative description 2: The relative phase variation between SRSs sent on multiple SRS resources or multiple SRS resource sets is within a certain range.

[0229] Alternative description 3: During the transmission of SRS on multiple SRS resources or multiple SRS resource sets, the relative phase change of the transmitting antenna of the terminal device is within a certain range.

[0230] That is, the network device may assume that the SRSs sent on multiple SRS resources or multiple SRS resource sets are sent through the same antenna port.

[0231] For example, if the sequences of the SRS sent on the first SRS resource and the SRS sent on the second SRS resource are exactly the same, and the relative phase changes of the transmitting antennas of these SRSs are within a certain range, then these SRSs can be said to have phase consistency, or be coherent.

[0232] For example, if the sequences of the SRS sent on the first SRS resource set (which may include one or more SRS resources) and the SRS sent on the second SRS resource set (which may include one or more SRS resources) are exactly the same, and the relative phase changes between these SRSs are within a certain range, then these SRSs can be said to be phase consistent, or coherent.

[0233] It should be noted that the relative phase change can also be understood as a change in phase difference. The relative phase change refers to the relative phase change of the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets.

[0234] In some implementations, the above-mentioned phase consistency indicator (or requirement) may be defined by a protocol or configured by a network device. The phase consistency indicator may be defined by a threshold p, or by a duration t and a threshold p.

[0235] Exemplarily, the phase consistency indicator may be: if the relative phase change does not exceed a threshold p, the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied.

[0236] Exemplarily, the phase consistency indicator may be: if the relative phase variation within duration t does not exceed a threshold p, then the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied. For example, if the relative phase variation of a signal transmitted by a transmitting antenna of a terminal device within duration t does not exceed a threshold value p, then the signal satisfies the phase consistency indicator and is therefore phase consistent; otherwise, the signal is not phase consistent.

[0237] According to the technical solution of the embodiment of the present application, if the SRSs sent on multiple SRS resources or multiple SRS resource sets have phase consistency, the network device can perform accurate channel prediction based on these SRSs to obtain the corresponding channel state information at a certain moment in the future; conversely, if there is no phase consistency, the accuracy of the channel prediction will be seriously deteriorated.

[0238] In some embodiments, the terminal device reports to the network device the maximum time length for which it can maintain phase consistency. The terminal device does not expect the total duration of multiple SRS resources or multiple SRS resource sets to exceed the maximum time length for which phase consistency can be maintained as reported by the terminal device. This limitation applies at least to the case where multiple SRS resources or multiple SRS resource sets are non-periodic SRS resources or non-periodic SRS resource sets, that is, the duration of a single SRS transmission triggered by the DCI does not exceed the maximum time length for which the terminal device can maintain phase consistency.

[0239] In some implementations, if the maximum time length reported by the terminal device to the network device is a specific value, such as 1, it indicates that the terminal device does not support phase consistency. In this case, the network device will not or cannot configure the terminal device with the aforementioned multiple SRS resources or multiple SRS resource sets for uplink channel prediction.

[0240] Exemplarily, the maximum time length may be expressed in time slots, or in symbols (such as OFDM symbols), or in ms.

[0241] In some embodiments, the terminal device receives a first time length indicated by the network device. For example, the network device may indicate the first time length through high-layer signaling (such as RRC signaling) or DCI. The SRS sent by the terminal device through multiple SRS resources or multiple SRS resource sets within the first time length needs to maintain phase consistency. This solution can at least be used when the multiple SRS resources or SRS resource sets are periodic or semi-persistent SRS resources or periodic or semi-persistent SRS resource sets.

[0242] Exemplarily, the first time length may be measured in time slots, or in symbols (such as OFDM symbols), or in ms.

[0243] In some embodiments, the first time length is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency.

[0244] In some embodiments, the SRSs transmitted by the terminal device over multiple SRS resources or multiple SRS resource sets within any time window having a first time length all maintain phase consistency. For example, as shown in FIG9 , the first time length is P, and the terminal device needs to ensure that the SRSs transmitted over the SRS resources or SRS resource sets have phase consistency within any time window having a length of P (the time window shown in the dotted box). In FIG9 , the three SRS resources are all periodic SRS resources or semi-persistent SRS resources with a period of T.

[0245] In other embodiments, the terminal device maintains phase consistency through the SRSs sent on multiple SRS resources or multiple SRS resource sets in each time window of the first time length starting from the first time domain offset. The first time domain offset can be indicated to the terminal device by the network device. The first time domain offset can be a time slot offset or a symbol offset, which is used to indicate the starting point of the first time window, and the SRSs sent in the first time window and each subsequent time window maintain phase consistency. The SRS in each time window of length P has phase consistency, and each time window of length P is a time window for the network device to perform uplink channel prediction. For example, as shown in Figure 10, the first time length is P, and the starting point of the first time window is determined based on the first time domain offset. The terminal device needs to ensure that the SRS sent on the SRS resource or SRS resource set has phase consistency in each time window of length P (the time window shown in the dotted box). In Figure 10, the three SRS resources are all periodic SRS resources or semi-persistent SRS resources with a period of T.

[0246] The technical solution of the embodiment of the present application can effectively reduce the implementation complexity of the terminal device by having the network device indicate a first time length that is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency. The terminal device only needs to ensure that the SRS has phase consistency within a shorter time window (i.e., the measurement time window of the network device).

[0247] Step 504: The network device receives the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets.

[0248] Step 505: The network device predicts uplink channel state information according to the received SRS.

[0249] In some embodiments, the network device can predict the uplink channel state information after X (X ≥ 1) time slots based on the uplink channel state information obtained by measuring several SRSs at equal intervals in the time domain. The network device uses the predicted uplink channel state information to schedule the PUSCH after X time slots, thereby avoiding the performance loss caused by the delay of the uplink channel state information. For example, as shown in Figure 11, four SRS resources are spaced by k symbols in the time domain. These four SRS resources are non-periodic SRS resources triggered by the same DCI. The SRS sent by the terminal device on these four SRS resources adopt the same transmission mode and the same transmission resources and have phase consistency; the network device receives SRS on these four SRS resources and can predict the uplink channel state information after X (X ≥ 1) time slots based on the received SRS, and schedule the PUSCH after X time slots based on the uplink channel state information. Here, one DCI is used to schedule the PUSCH and trigger multiple SRS resources at the same time, so as to save the overhead of downlink control signaling.

[0250] Application Example 2

[0251] In this application example, SRSs on multiple SRS resource sets are used for downlink channel prediction (i.e., downlink channel state information prediction). As shown in FIG12 , this application example includes one or more of the following steps:

[0252] Step 1201: The network device configures multiple SRS resource sets, wherein the SRS resource sets are configured with the same transmission mode, the same transmission resources and the same usage.

[0253] Step 1202: The terminal device receives multiple SRS resource sets configured by the network device.

[0254] Step 1203: The terminal device sends SRS on multiple SRS resource sets, wherein the SRS sent on the multiple SRS resource sets adopt the same transmission mode and the same transmission resources and have phase consistency.

[0255] The following describes the same transmission method:

[0256] In some implementations, when a network device is configured with multiple SRS resources, the SRSs on the multiple SRS resources use the same transmission method, including at least one of the following:

[0257] 1. The SRSs on multiple SRS resources use the same transmission power.

[0258] Here, the network device configures the same power control parameters for multiple SRS resources, and the terminal device transmits SRSs using the same transmission power on the multiple SRS resources according to the configuration of the network device.

[0259] 2. The SRSs on multiple SRS resources use the same transmission beam (which can also be described as a spatial transmission filter).

[0260] Here, the network device configures the same spatial-related parameters (or spatial-related information) or the same TCI state for multiple SRS resources, and the terminal device uses the same transmission beam (also described as a spatial transmission filter) to send SRS on multiple SRS resources according to the configuration of the network device.

[0261] 3. The SRSs on multiple SRS resources use the same number of antenna ports.

[0262] Here, the network device configures the same number of antenna ports for multiple SRS resources, and the terminal device uses the same number of antenna ports to send SRS on the multiple SRS resources according to the configuration of the network device.

[0263] 4. The SRSs on multiple SRS resources use the same antenna port.

[0264] Here, the network device configures the same antenna port for multiple SRS resources, and the terminal device uses the same antenna port to transmit SRS on multiple SRS resources based on the network device's configuration. In other words, the terminal device uses the same antenna port to transmit SRS on different SRS resources; the network device can assume that the precoding matrix / beam used by the SRS sent on different SRS resources is exactly the same.

[0265] Exemplarily, the SRSs on multiple SRS resources adopting the same transmission mode may be: the SRSs on multiple SRS resources adopt the same transmission power, the same transmission beam and the same number of antenna ports.

[0266] Exemplarily, the SRSs on multiple SRS resources adopting the same transmission mode may be: the SRSs on multiple SRS resources adopt the same transmission power, the same transmission beam and the same antenna port.

[0267] The above examples are merely illustrative, and the technical solutions of the embodiments of the present application may also have other combinations.

[0268] In some implementations, when a network device is configured with multiple SRS resource sets, the SRSs on the multiple SRS resource sets use the same transmission method, including at least one of the following:

[0269] 1. The SRSs on multiple SRS resource sets use the same transmission power.

[0270] Here, the network device configures the same power control parameters for multiple SRS resource sets, and the terminal device transmits SRSs using the same transmit power on the multiple SRS resource sets according to the configuration of the network device.

[0271] 2. The SRSs on multiple SRS resource sets use the same transmission beam (which can also be described as a spatial transmission filter).

[0272] Here, the network device configures the SRS resources in multiple SRS resource sets with the same spatial-related parameters (or spatial-related information) or the same TCI state, and the terminal device uses the same transmit beam (also described as a spatial transmission filter) to transmit SRS on multiple SRS resource sets based on the configuration of the network device. Optionally, the network device can also configure the SRS resources in multiple SRS resource sets with the same associated CSI-RS, so that the terminal device can determine the same precoding matrix and transmit beam (also described as a spatial transmission filter) for the SRS resources in the SRS resource set based on the same associated CSI-RS.

[0273] 3. The SRSs on multiple SRS resource sets use the same number of antenna ports.

[0274] Here, the network device configures the same number of antenna ports for the SRS resources in multiple SRS resource sets, and the terminal device uses the same number of antenna ports to send SRS on the multiple SRS resource sets according to the configuration of the network device.

[0275] 4. The SRSs on multiple SRS resource sets use the same antenna port.

[0276] Here, the network device configures the same antenna port for the SRS resources in multiple SRS resource sets. The terminal device uses the same antenna port to transmit SRS on multiple SRS resource sets based on the network device's configuration. In other words, the terminal device uses the same antenna port to transmit SRS on different SRS resource sets; the network device can assume that the precoding matrix / beam used by the SRS sent on different SRS resource sets is exactly the same.

[0277] Exemplarily, the SRSs on multiple SRS resource sets adopting the same transmission mode may be: the SRSs on multiple SRS resource sets adopt the same transmission power, the same transmission beam and the same number of antenna ports.

[0278] Exemplarily, the SRSs on multiple SRS resource sets adopting the same transmission mode may be: the SRSs on multiple SRS resource sets adopt the same transmission power, the same transmission beam and the same antenna port.

[0279] The above examples are merely illustrative, and the technical solutions of the embodiments of the present application may also have other combinations.

[0280] The following describes the same transmission resources:

[0281] The SRSs in multiple SRS resource sets use the same transmission resources, including at least one of the following:

[0282] 1. The SRSs in multiple SRS resource sets use the same OFDM symbol index.

[0283] Here, the network device configures the same OFDM symbol index for the SRS resources in multiple SRS resource sets. For example, the network device can configure the same symbol starting position and number of OFDM symbols, thereby achieving the same OFDM symbol index. The terminal device uses the same OFDM symbol index to send SRS on multiple SRS resource sets based on the configuration of the network device.

[0284] 2. The SRSs on multiple SRS resource sets use the same frequency domain resources.

[0285] Here, the network device configures the same frequency domain resources for the SRS resources in multiple SRS resource sets. For example, the network device can configure the same frequency band, the same PRB, the same comb structure, the same comb offset, etc., thereby configuring the same frequency domain resources. The terminal device uses the same frequency domain resources to send SRS on multiple SRS resource sets based on the configuration of the network device.

[0286] 3. The SRSs on multiple SRS resource sets use the same frequency hopping configuration.

[0287] Here, the network device configures the same frequency hopping parameters for the SRS resources in the multiple SRS resource sets. The terminal device transmits SRSs using the same frequency hopping configuration on the multiple SRS resource sets according to the configuration of the network device.

[0288] Exemplarily, the SRSs on multiple SRS resource sets using the same transmission resources may be: the SRSs on multiple SRS resource sets using the same OFDM symbol index and the same frequency domain resources.

[0289] Exemplarily, the SRSs on multiple SRS resource sets using the same transmission resources may be: the SRSs on multiple SRS resource sets using the same OFDM symbol index, the same frequency domain resources, and the same frequency hopping configuration.

[0290] The technical solution of the embodiment of the present application is that when the SRSs on multiple SRS resource sets use the same transmission mode and transmission resources, the network device can accurately predict the downlink channel based on these SRSs and obtain the downlink channel state information (such as the precoding matrix) corresponding to a certain time in the future. If the transmission mode or transmission resources are different, the accuracy of the channel prediction will be seriously deteriorated.

[0291] The following describes the same usage:

[0292] In some implementations, multiple SRS resource sets are configured for the same purpose.

[0293] In some implementations, the network device configures the same usage for multiple SRS resource sets through higher layer signaling.

[0294] Exemplarily, for the above-mentioned multiple SRS resource sets, their purpose is configured as "antenna switching", that is, each SRS resource set supports xTyR antenna switching, and the network device can obtain complete uplink channel state information based on each SRS resource set, and then predict the downlink channel state information based on channel reciprocity based on multiple SRS resource sets.

[0295] For example, for the above multiple SRS resource sets, the network device may define a new usage, thereby distinguishing it from the usage configuration supported by the existing protocol. For example, the usage of the multiple SRS resource sets may be configured as "channel prediction" or "downlink channel prediction."

[0296] In some implementations, multiple SRS resource sets are aperiodic SRS resource sets triggered by the same DCI. That is, the aperiodic trigger states corresponding to these SRS resource sets are the same. For example, as shown in FIG13 , three SRS resource sets are aperiodic SRS resource sets triggered by a single DCI, each of which supports 1-transmit-2-receive (1T2R) antenna switching. In this case, the SRSs transmitted on a DCI-triggered aperiodic SRS resource set are phase-consistent.

[0297] In some implementations, the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period. As shown in FIG14 , both of the two SRS resource sets are periodic SRS resource sets with a period of T.

[0298] In some implementations, multiple SRS resource sets are spaced the same number of symbols or time slots apart in the time domain. This spacing can be achieved by configuring the triggering time slot offsets for the SRS resource sets on the network device. For example, multiple SRS resource sets can be spaced n time slots apart, as shown in Figure 13. That is, in Figure 13, the time slot offsets for the three SRS resource sets triggered by the DCI are j, n+j, and 2n+j, respectively.

[0299] In the above example, the value of n can be indicated by the network device to the terminal device, and its value range can be pre-agreed. For example, the value range of n can be 1 and 2, where 1 represents adjacent time slots and 2 represents one time slot apart.

[0300] The following explains phase consistency.

[0301] In some implementations, the SRSs sent on the multiple SRS resource sets have phase consistency and may be replaced by other essentially the same descriptions. For example, the replaceable descriptions include the following:

[0302] Alternative description 1: SRSs sent on multiple SRS resource sets are coherent.

[0303] Alternative description 2: The relative phase variation between SRSs sent on multiple SRS resource sets is within a certain range.

[0304] Alternative description 3: During the transmission of SRS on multiple SRS resource sets, the relative phase change of the transmitting antenna of the terminal device is within a certain range.

[0305] That is, the network device may assume that the SRSs sent on multiple SRS resource sets are sent through the same antenna port.

[0306] For example, if the sequences of the SRS sent on the first SRS resource set (which may include one or more SRS resources) and the SRS sent on the second SRS resource set (which may include one or more SRS resources) are exactly the same, and the relative phase changes between these SRSs are within a certain range, then these SRSs can be said to be phase consistent, or coherent.

[0307] It should be noted that the relative phase change can also be understood as a change in phase difference. The relative phase change refers to the relative phase change of the SRS sent by the terminal device on multiple SRS resource sets.

[0308] In some implementations, the above-mentioned phase consistency indicator (or requirement) may be defined by a protocol or configured by a network device. The phase consistency indicator may be defined by a threshold p, or by a duration t and a threshold p.

[0309] Exemplarily, the phase consistency indicator may be: if the relative phase change does not exceed a threshold p, the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied.

[0310] Exemplarily, the phase consistency indicator may be: if the relative phase variation within duration t does not exceed a threshold p, then the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied. For example, if the relative phase variation of a signal transmitted by a transmitting antenna of a terminal device within duration t does not exceed a threshold value p, then the signal satisfies the phase consistency indicator and is therefore phase consistent; otherwise, the signal is not phase consistent.

[0311] According to the technical solution of the embodiment of the present application, if the SRSs sent on multiple SRS resource sets have phase consistency, the network device can perform accurate channel prediction based on these SRSs and obtain the corresponding channel state information at a certain moment in the future; conversely, if there is no phase consistency, the accuracy of the channel prediction will be seriously deteriorated.

[0312] In some embodiments, the terminal device reports to the network device the maximum duration for which it can maintain phase consistency. The terminal device does not expect the total duration of multiple SRS resource sets to exceed the maximum duration for which phase consistency can be maintained as reported by the terminal device. This restriction applies at least to the case where the multiple SRS resource sets are aperiodic SRS resource sets, that is, the duration of a single SRS transmission triggered by a DCI does not exceed the maximum duration for which the terminal device can maintain phase consistency.

[0313] In some implementations, if the maximum time length reported by the terminal device to the network device is a specific value, such as 1, it indicates that the terminal device does not support phase consistency. In this case, the network device will not or cannot configure the multiple SRS resource sets for the terminal device for downlink channel prediction.

[0314] Exemplarily, the maximum time length may be expressed in time slots, or in symbols (such as OFDM symbols), or in ms.

[0315] In some embodiments, a terminal device receives a first time length indicated by a network device. For example, the network device may indicate the first time length via higher-layer signaling (e.g., RRC signaling) or DCI. The SRSs transmitted by the terminal device via multiple SRS resource sets within the first time length need to maintain phase consistency. This solution can at least be used when the multiple SRS resource sets are periodic or semi-persistent SRS resource sets.

[0316] Exemplarily, the first time length may be measured in time slots, or in symbols (such as OFDM symbols), or in ms.

[0317] In some embodiments, the first time length is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency.

[0318] In some embodiments, the SRSs transmitted by the terminal device over multiple SRS resource sets within any time window having a first time length maintain phase consistency. For example, as shown in FIG14 , the first time length is P, and the terminal device needs to ensure that the SRSs transmitted over the SRS resource sets have phase consistency within any time window having a length of P (the time window shown in the dotted box). In FIG14 , both SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with a period of T.

[0319] In other embodiments, the terminal device maintains phase consistency through the SRSs sent on multiple SRS resource sets in each time window of the first time length starting from the first time domain offset. The first time domain offset can be indicated to the terminal device by the network device. The first time domain offset can be a time slot offset or a symbol offset, which is used to indicate the starting point of the first time window, and the SRSs sent in the first time window and each subsequent time window maintain phase consistency. The SRSs in each time window of length P have phase consistency, and each time window of length P is a time window for the network device to perform downlink channel prediction. For example, as shown in Figure 15, the first time length is P, and the starting point of the first time window is determined based on the first time domain offset. The terminal device needs to ensure that the SRSs sent on the SRS resource set have phase consistency in each time window of length P (the time window shown in the dotted box). In Figure 15, the two SRS resource sets are both periodic SRS resource sets or semi-persistent SRS resource sets with a period of T.

[0320] The technical solution of the embodiment of the present application can effectively reduce the implementation complexity of the terminal device by having the network device indicate a first time length that is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency. The terminal device only needs to ensure that the SRS has phase consistency within a shorter time window (i.e., the measurement time window of the network device).

[0321] Step 1204: The network device receives the SRS sent by the terminal device on multiple SRS resource sets.

[0322] Step 1205: The network device predicts downlink channel state information according to the received SRS.

[0323] Here, based on channel reciprocity, the network device can obtain the downlink channel state information based on the uplink channel state information measured on the SRS resource set.

[0324] In some embodiments, for each SRS resource set, the network device obtains uplink channel state information based on several SRS measurements equally spaced in the time domain; the network device obtains downlink channel state information based on the uplink channel state information based on channel reciprocity; the network device predicts the downlink channel state information (such as the downlink precoding matrix) after k time slots based on the downlink channel information at several moments obtained by measurement; the network device uses the predicted downlink channel state information to transmit the PDSCH after Y time slots, thereby avoiding performance loss caused by the delay of the downlink channel state information. For example, as shown in Figure 16, three SRS resource sets are spaced n time slots apart in the time domain. These three SRS resource sets are non-periodic SRS resource sets triggered by the same DCI. The SRS sent by the terminal device on these three SRS resource sets uses the same transmission mode and the same transmission resources, and has phase consistency. The network device receives SRS on these three SRS resource sets and can predict the downlink channel state information after Y (Y ≥ 1) time slots based on the received SRS. Based on this downlink channel state information, the PDSCH is transmitted after Y time slots. Here, one DCI is used to schedule the PDSCH and simultaneously trigger multiple SRS resource sets, thereby saving the overhead of downlink control signaling.

[0325] Application Example 3

[0326] In this application example, multiple SRS resources or SRSs on an SRS resource set are used for TDCP measurement. As shown in FIG17 , this application example includes one or more of the following steps:

[0327] Step 1701: The network device configures multiple SRS resources or multiple SRS resource sets, wherein the multiple SRS resources or SRS resource sets are configured with the same transmission mode, the same transmission resources and the same purpose.

[0328] Step 1702: The terminal device receives multiple SRS resources or multiple SRS resource sets configured by the network device.

[0329] Step 1703: The terminal device sends SRS on multiple SRS resources or multiple SRS resource sets, wherein the SRS sent on multiple SRS resources or multiple SRS resource sets adopt the same transmission method and the same transmission resources and have phase consistency.

[0330] The following describes the same transmission method:

[0331] In some implementations, when a network device is configured with multiple SRS resources, the SRSs on the multiple SRS resources use the same transmission method, including at least one of the following:

[0332] 1. The SRSs on multiple SRS resources use the same transmission power.

[0333] Here, the network device configures the same power control parameters for multiple SRS resources, and the terminal device transmits SRSs using the same transmission power on the multiple SRS resources according to the configuration of the network device.

[0334] 2. The SRSs on multiple SRS resources use the same transmission beam (which can also be described as a spatial transmission filter).

[0335] Here, the network device configures the same spatial-related parameters (or spatial-related information) or the same TCI state for multiple SRS resources, and the terminal device uses the same transmission beam (also described as a spatial transmission filter) to send SRS on multiple SRS resources according to the configuration of the network device.

[0336] 3. The SRSs on multiple SRS resources use the same number of antenna ports.

[0337] Here, the network device configures the same number of antenna ports for multiple SRS resources, and the terminal device uses the same number of antenna ports to send SRS on the multiple SRS resources according to the configuration of the network device.

[0338] Exemplarily, when SRS is used for TDCP measurement, the number of antenna ports of multiple SRS resources may be fixed to 1, thereby reducing SRS overhead.

[0339] 4. The SRSs on multiple SRS resources use the same antenna port.

[0340] Here, the network device configures the same antenna port for multiple SRS resources, and the terminal device uses the same antenna port to transmit SRS on multiple SRS resources based on the network device's configuration. In other words, the terminal device uses the same antenna port to transmit SRS on different SRS resources; the network device can assume that the precoding matrix / beam used by the SRS sent on different SRS resources is exactly the same.

[0341] Exemplarily, the SRSs on multiple SRS resources adopting the same transmission mode may be: the SRSs on multiple SRS resources adopt the same transmission power, the same transmission beam and the same number of antenna ports.

[0342] Exemplarily, the SRSs on multiple SRS resources adopting the same transmission mode may be: the SRSs on multiple SRS resources adopt the same transmission power, the same transmission beam and the same antenna port.

[0343] The above examples are only for illustration, and the technical solutions of the embodiments of the present application may also have other combinations.

[0344] In some implementations, when a network device is configured with multiple SRS resource sets, the SRSs on the multiple SRS resource sets use the same transmission method, including at least one of the following:

[0345] 1. The SRSs on multiple SRS resource sets use the same transmission power.

[0346] Here, the network device configures the same power control parameters for multiple SRS resource sets, and the terminal device transmits SRS using the same transmission power on the multiple SRS resource sets according to the configuration of the network device.

[0347] 2. The SRSs on multiple SRS resource sets use the same transmission beam (which can also be described as a spatial transmission filter).

[0348] Here, the network device configures the SRS resources in multiple SRS resource sets with the same spatial-related parameters (or spatial-related information) or the same TCI state, and the terminal device uses the same transmit beam (also described as a spatial transmission filter) to transmit SRS on multiple SRS resource sets based on the configuration of the network device. Optionally, the network device can also configure the SRS resources in multiple SRS resource sets with the same associated CSI-RS, so that the terminal device can determine the same precoding matrix and transmit beam (also described as a spatial transmission filter) for the SRS resources in the SRS resource set based on the same associated CSI-RS.

[0349] 3. The SRSs on multiple SRS resource sets use the same number of antenna ports.

[0350] Here, the network device configures the same number of antenna ports for the SRS resources in multiple SRS resource sets, and the terminal device uses the same number of antenna ports to send SRS on the multiple SRS resource sets according to the configuration of the network device.

[0351] Exemplarily, when SRS is used for TDCP measurement, the number of antenna ports of multiple SRS resource sets may be fixed to 1, thereby reducing SRS overhead.

[0352] 4. The SRSs on multiple SRS resource sets use the same antenna port.

[0353] Here, the network device configures the same antenna port for the SRS resources in multiple SRS resource sets. The terminal device uses the same antenna port to transmit SRS on multiple SRS resource sets based on the network device's configuration. In other words, the terminal device uses the same antenna port to transmit SRS on different SRS resource sets; the network device can assume that the precoding matrix / beam used by the SRS sent on different SRS resource sets is exactly the same.

[0354] Exemplarily, the SRSs on multiple SRS resource sets adopting the same transmission mode may be: the SRSs on multiple SRS resource sets adopt the same transmission power, the same transmission beam and the same number of antenna ports.

[0355] Exemplarily, the SRSs on multiple SRS resource sets adopting the same transmission mode may be: the SRSs on multiple SRS resource sets adopt the same transmission power, the same transmission beam and the same antenna port.

[0356] The above examples are only for illustration, and the technical solutions of the embodiments of the present application may also have other combinations.

[0357] The following describes the same transmission resources:

[0358] In some implementations, when a network device is configured with multiple SRS resources, the SRSs on the multiple SRS resources use the same transmission resource, including at least one of the following:

[0359] 1. The SRSs on multiple SRS resources use the same OFDM symbol index.

[0360] Here, the network device configures the same OFDM symbol index for multiple SRS resources. For example, the network device can configure the same symbol starting position and number of OFDM symbols for multiple SRS resources, thereby configuring the same OFDM symbol index. The terminal device uses the same OFDM symbol index to send SRS on multiple SRS resources based on the configuration of the network device.

[0361] 2. The SRSs on multiple SRS resources use the same frequency domain resources.

[0362] Here, the network device configures the same frequency domain resources for multiple SRS resources. For example, the network device can configure the same frequency band, the same PRB, the same comb structure, the same comb offset, etc. for multiple SRS resources, thereby achieving the same configuration of frequency domain resources. The terminal device uses the same frequency domain resources to send SRS on multiple SRS resources based on the configuration of the network device.

[0363] 3. The SRSs on multiple SRS resources use the same frequency hopping configuration.

[0364] Here, the network device configures the same frequency hopping parameters for multiple SRS resources. The terminal device transmits SRS using the same frequency hopping configuration on multiple SRS resources according to the configuration of the network device.

[0365] 4. The SRSs on multiple SRS resources use the same cyclic shift.

[0366] Here, the network device configures the same cyclic shift for multiple SRS resources. The terminal device transmits SRS on the multiple SRS resources using the same cyclic shift according to the configuration of the network device.

[0367] 5. The SRSs on multiple SRS resources use the same SRS base sequence.

[0368] Here, the network device configures the same SRS base sequence for multiple SRS resources, and the network device may configure the same SRS base sequence ID for multiple SRS resources.

[0369] The terminal device transmits the SRS using the same SRS sequence on multiple SRS resources according to the configuration of the network device.

[0370] Exemplarily, the SRSs on multiple SRS resources using the same transmission resource may be: the SRSs on multiple SRS resources using the same OFDM symbol index, the same frequency domain resource and the same SRS sequence (the same SRS base sequence and the same cyclic shift).

[0371] Exemplarily, the SRSs on multiple SRS resources using the same transmission resources may be: the SRSs on multiple SRS resources using the same OFDM symbol index, the same frequency domain resources, the same frequency hopping configuration and the same SRS sequence (the same SRS base sequence and the same cyclic shift).

[0372] The above examples are merely illustrative, and the technical solutions of the embodiments of the present application may also have other combinations.

[0373] In some implementations, when a network device is configured with multiple SRS resource sets, the SRSs on the multiple SRS resource sets use the same transmission resource, including at least one of the following:

[0374] 1. The SRSs in multiple SRS resource sets use the same OFDM symbol index.

[0375] Here, the network device configures the same OFDM symbol index for the SRS resources in multiple SRS resource sets. For example, the network device can configure the same symbol starting position and number of OFDM symbols, thereby achieving the same OFDM symbol index. The terminal device uses the same OFDM symbol index to send SRS on multiple SRS resource sets based on the configuration of the network device.

[0376] 2. The SRSs on multiple SRS resource sets use the same frequency domain resources.

[0377] Here, the network device configures the same frequency domain resources for the SRS resources in multiple SRS resource sets. For example, the network device can configure the same frequency band, the same PRB, the same comb structure, the same comb offset, etc., thereby configuring the same frequency domain resources. The terminal device uses the same frequency domain resources to send SRS on multiple SRS resource sets based on the configuration of the network device.

[0378] 3. The SRSs on multiple SRS resource sets use the same frequency hopping configuration.

[0379] Here, the network device configures the same frequency hopping parameters for the SRS resources in the multiple SRS resource sets. The terminal device transmits SRSs using the same frequency hopping configuration on the multiple SRS resource sets according to the configuration of the network device.

[0380] 4. The SRSs on multiple SRS resource sets use the same cyclic shift.

[0381] Here, the network device configures the same cyclic shift for multiple SRS resource sets. The terminal device transmits SRSs using the same cyclic shift on the multiple SRS resource sets according to the configuration of the network device.

[0382] 5. The SRSs on multiple SRS resource sets use the same SRS base sequence.

[0383] Here, the network device configures the same SRS base sequence for multiple SRS resource sets. The network device may configure the same SRS base sequence ID for multiple SRS resource sets.

[0384] The terminal device transmits the SRS using the same SRS sequence on multiple SRS resource sets according to the configuration of the network device.

[0385] Exemplarily, the SRSs on multiple SRS resource sets using the same transmission resources may be: the SRSs on multiple SRS resource sets using the same OFDM symbol index, the same frequency domain resources and the same SRS sequence (the same SRS base sequence and the same cyclic shift).

[0386] Exemplarily, the SRS on multiple SRS resource sets using the same transmission resources can be: the SRS on multiple SRS resource sets using the same OFDM symbol index, the same frequency domain resources, the same frequency hopping configuration and the same SRS sequence (the same SRS base sequence and the same cyclic shift).

[0387] The above examples are only for illustration, and the technical solutions of the embodiments of the present application may also have other combinations.

[0388] According to the technical solution of the embodiments of the present application, when the SRSs on multiple SRS resources or multiple SRS resource sets use the same transmission mode and transmission resources, the network device can perform TDCP measurements based on these SRSs. If the transmission modes or transmission resources are different, the network device cannot perform accurate TDCP measurements. On the other hand, if the SRS sequences used by multiple SRS resources or multiple SRS resource sets are also exactly the same, the network device can directly perform TDCP measurements based on the received SRSs without the need for channel estimation, thereby reducing implementation complexity.

[0389] The following describes the same usage:

[0390] In some implementations, for multiple SRS resources or multiple SRS resource sets configured by a network device, the multiple SRS resources or the multiple SRS resource sets are configured with the same usage.

[0391] In some implementations, the network device configures the same usage for multiple SRS resources or multiple SRS resource sets through higher layer signaling.

[0392] For example, for the above-mentioned multiple SRS resources or multiple SRS resource sets, the network device can define a new purpose, thereby distinguishing it from the purpose configuration supported in the existing protocol. For example, the purpose of multiple SRS resources or multiple SRS resource sets can be configured as "TDCP measurement" or "TDCP".

[0393] In some embodiments, multiple SRS resources or multiple SRS resource sets are aperiodic SRS resources or aperiodic SRS resource sets triggered by the same DCI. That is, the aperiodic trigger states corresponding to these SRS resources or SRS resource sets are the same. For example, as shown in Figures 6 and 8, in Figure 6, four SRS resources are aperiodic SRS resources triggered by one DCI, and in Figure 8, three SRS resource sets are aperiodic SRS resource sets triggered by the same DCI. In this case, the SRSs transmitted on a DCI-triggered aperiodic SRS resource or SRS resource set have phase consistency.

[0394] In other embodiments, the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period, or the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period. As shown in FIG7 , the three SRS resources are all periodic SRS resources with a period of T.

[0395] In some embodiments, multiple SRS resources or multiple SRS resource sets are spaced apart by the same number of symbols or the same number of time slots in the time domain. Here, the same number of time slots can be achieved by configuring the time slot offset of the SRS resources or configuring the triggering time slot offset of the SRS resource set by the network device. For example, multiple SRS resources can be spaced apart by k symbols, as shown in Figure 6. For example, multiple SRS resources can be spaced apart by m time slots, as shown in Figure 7. For example, multiple SRS resource sets can be spaced apart by n time slots, as shown in Figure 8. That is, in Figure 8, the time slot offsets of the three SRS resource sets triggered by the DCI are j, n+j, and 2n+j, respectively.

[0396] In the above example, the values ​​of k / m / n can be indicated by the network device to the terminal device, and their value ranges can be pre-agreed. For example, the values ​​of m and n can range from 1 to 2, where 1 indicates adjacent time slots and 2 indicates one time slot apart.

[0397] The following explains phase consistency.

[0398] In some implementations, the SRSs sent on the multiple SRS resources or multiple SRS resource sets have phase consistency and may be replaced by other essentially the same descriptions. For example, the replaceable descriptions include the following:

[0399] Alternative description 1: SRSs transmitted on multiple SRS resources or multiple SRS resource sets are coherent.

[0400] Alternative description 2: The relative phase variation between SRSs sent on multiple SRS resources or multiple SRS resource sets is within a certain range.

[0401] Alternative description 3: During the transmission of SRS on multiple SRS resources or multiple SRS resource sets, the relative phase change of the transmitting antenna of the terminal device is within a certain range.

[0402] That is, the network device may assume that the SRSs sent on multiple SRS resources or multiple SRS resource sets are sent through the same antenna port.

[0403] For example, if the sequences of the SRS sent on the first SRS resource and the SRS sent on the second SRS resource are exactly the same, and the relative phase changes of the transmitting antennas of these SRSs are within a certain range, then these SRSs can be said to have phase consistency, or be coherent.

[0404] For example, if the sequences of the SRS sent on the first SRS resource set (which may include one or more SRS resources) and the SRS sent on the second SRS resource set (which may include one or more SRS resources) are exactly the same, and the relative phase changes between these SRSs are within a certain range, then these SRSs can be said to be phase consistent, or coherent.

[0405] It should be noted that the relative phase change can also be understood as a change in phase difference. The relative phase change refers to the relative phase change of the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets.

[0406] In some implementations, the above-mentioned phase consistency indicator (or requirement) may be defined by a protocol or configured by a network device. The phase consistency indicator may be defined by a threshold p, or by a duration t and a threshold p.

[0407] Exemplarily, the phase consistency indicator may be: if the relative phase change does not exceed a threshold p, the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied.

[0408] Exemplarily, the phase consistency indicator may be: if the relative phase variation within duration t does not exceed a threshold p, then the phase consistency indicator is satisfied; otherwise, the phase consistency indicator is not satisfied. For example, if the relative phase variation of a signal transmitted by a transmitting antenna of a terminal device within duration t does not exceed a threshold value p, then the signal satisfies the phase consistency indicator and is therefore phase consistent; otherwise, the signal is not phase consistent.

[0409] According to the technical solution of the embodiment of the present application, if the SRSs sent on multiple SRS resources or multiple SRS resource sets have phase consistency, the network device can perform TDCP measurement based on these SRSs; otherwise, if there is no phase consistency, the TDCP measurement result will be unusable because the phase change is unknown.

[0410] In some embodiments, the terminal device reports to the network device the maximum time length for which it can maintain phase consistency. The terminal device does not expect the total duration of multiple SRS resources or multiple SRS resource sets to exceed the maximum time length for which phase consistency can be maintained as reported by the terminal device. This limitation applies at least to the case where multiple SRS resources or multiple SRS resource sets are non-periodic SRS resources or non-periodic SRS resource sets, that is, the duration of a single SRS transmission triggered by the DCI does not exceed the maximum time length for which the terminal device can maintain phase consistency.

[0411] In some implementations, if the maximum time length reported by the terminal device to the network device is a specific value, such as 1, it indicates that the terminal device does not support phase consistency. In this case, the network device will not or cannot configure the terminal device with the above-mentioned multiple SRS resources or multiple SRS resource sets for TDCP measurement.

[0412] Exemplarily, the maximum time length may be in units of time slots, or in units of symbols (such as OFDM symbols), or in units of ms.

[0413] In some embodiments, the terminal device receives a first time length indicated by the network device. For example, the network device may indicate the first time length through high-layer signaling (such as RRC signaling) or DCI, and the first time length is the time window for the network device to perform TDCP measurement. The SRS sent by the terminal device through multiple SRS resources or multiple SRS resource sets within the first time length needs to maintain phase consistency. This solution can at least be used when the multiple SRS resources or SRS resource sets are periodic or semi-persistent SRS resources or periodic or semi-persistent SRS resource sets.

[0414] Exemplarily, the first time length may be measured in time slots, or in symbols (such as OFDM symbols), or in ms.

[0415] In some embodiments, the first time length is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency.

[0416] The technical solution of the embodiment of the present application can effectively reduce the implementation complexity of the terminal device by having the network device indicate a first time length that is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency. The terminal device only needs to ensure that the SRS has phase consistency within a shorter time window (i.e., the TDCP measurement time window of the network device).

[0417] Step 1704: The network device receives the SRS sent by the terminal device on multiple SRS resource sets.

[0418] Step 1705: The network device performs TDCP measurement according to the received SRS.

[0419] In some implementations, the network device may configure uplink and downlink parameters based on the TDCP measurement results.

[0420] Exemplarily, the network device may determine the channel state information reporting configuration and the CSI-RS resource configuration parameters based on the TDCP measurement result.

[0421] Exemplarily, the network device may determine the SRS resource configuration parameters based on the result of the TDCP measurement.

[0422] Exemplarily, the network device may determine a precoding scheme based on the result of the TDCP measurement, for example, determining a feedback scheme based on a precoding matrix indication (PMI), or determining a feedback scheme based on channel reciprocity, or determining the type of codebook to be used.

[0423] Application Example 4

[0424] In this application example, an SRS resource (set) represents an SRS resource or an SRS resource set. An SRS resource (set) in a plurality of SRS resources (sets) is an aperiodic SRS resource (set) triggered by the same DCI. As shown in FIG18 , this application example includes one or more of the following steps:

[0425] Step 1801: The network device configures multiple SRS resources (sets) for the terminal device through RRC signaling, wherein the multiple SRS resources (sets) are configured with the same transmission mode, the same transmission resources and the same purpose.

[0426] Here, the specific implementation of the same transmission mode, the same transmission resources and the same purpose can refer to the aforementioned related solutions.

[0427] Step 1802: The terminal device obtains configuration information of multiple SRS resources (sets) based on RRC signaling.

[0428] Here, the specific implementation of the configuration information of multiple SRS resources (sets) can refer to the aforementioned related solutions. It should be noted that the type of the SRS resource (set) is configured in the configuration information of each SRS resource (set), and the type here refers to aperiodic.

[0429] Step 1803: The network device indicates through DCI that multiple SRS resources (sets) are triggered.

[0430] Here, the format of the DCI and the method of indicating the triggered multiple SRS resources (sets) can refer to the aforementioned related solutions.

[0431] Step 1804: The terminal device determines multiple triggered SRS resources (sets) based on the DCI, and performs SRS transmission on the multiple triggered SRS resources (sets).

[0432] Here, after the terminal device receives the DCI and determines the multiple SRS resources (sets) that are triggered, it determines that the purposes of the multiple SRS resources (sets) are the same based on the configuration information of the multiple SRS resources (sets) (obtained through step 1802); when it is determined that the purposes of the multiple SRS resources (sets) are the same, the same transmission method and the same transmission resources are used to perform SRS transmission on the multiple SRS resources (sets) that are triggered, and the SRS transmitted on the multiple SRS resources (sets) have phase consistency.

[0433] Here, there is a slot offset between the SRS transmission on multiple SRS resources (sets) and the DCI, which can be configured by high-level signaling (such as RRC signaling). For example: if the terminal device receives DCI in time slot n, the terminal device will SRS is sent on the SRS resource (set), where k is indicated by the parameter slot offset configured for the SRS resource (set), and μ SRS and μ PDCCH They are respectively the subcarrier spacing configuration of the SRS resource (set) triggered by DCI and the subcarrier spacing configuration of the PDCCH where the DCI is located.

[0434] Step 1805: The network device receives the SRS sent by the terminal device on multiple SRS resources (sets).

[0435] Step 1806: The network device performs channel prediction or TDCP measurement based on the received SRS.

[0436] Here, in step 1801, the network device configures multiple SRS resources (sets) with the same purpose, which depends on the implementation of the network device and can be uplink channel prediction, downlink channel prediction, or TDCP measurement. The network device performs operations corresponding to the purpose based on the received SRS.

[0437] As an implementation, if the purpose is uplink channel prediction, the network device performs uplink channel prediction based on the received SRS. As another implementation, if the purpose is downlink channel prediction, the network device performs downlink channel prediction based on the received SRS. As yet another implementation, if the purpose is TDCP measurement, the network device performs TDCP measurement based on the received SRS.

[0438] Here, the specific implementation of uplink channel prediction can refer to the relevant solutions of the aforementioned application example 1. The specific implementation of downlink channel prediction can refer to the relevant solutions of the aforementioned application example 2. The specific implementation of TDCP measurement can refer to the relevant solutions of the aforementioned application example 3.

[0439] Application Example 5

[0440] In this application example, an SRS resource (set) represents an SRS resource or an SRS resource set. The SRS resources (sets) in the multiple SRS resources (sets) are periodic SRS resources with the same period. As shown in FIG19 , this application example includes one or more of the following steps:

[0441] Step 1901: The network device configures multiple SRS resources (sets) for the terminal device through RRC signaling, wherein the multiple SRS resources (sets) are configured with the same period, the same transmission mode, the same transmission resources and the same purpose.

[0442] Here, the specific implementation of the same transmission mode, the same transmission resources and the same purpose can refer to the aforementioned related solutions.

[0443] Step 1902: The terminal device obtains configuration information of multiple SRS resources (sets) based on RRC signaling.

[0444] Here, the specific implementation of the configuration information of multiple SRS resources (sets) can refer to the aforementioned related solutions. It should be noted that the type of the SRS resource (set) is configured in the configuration information of each SRS resource (set), and the type here refers to the period.

[0445] Step 1903: The terminal device periodically transmits SRS on multiple SRS resources (sets) according to the configuration information until the configuration information becomes invalid.

[0446] Here, RRC signaling configures the period and slot offset for each SRS resource (set). Multiple SRS resources (sets) have the same period, but different slot offsets. Once a terminal device receives configuration information for multiple SRS resources (sets), it periodically transmits SRS on these resources (sets) according to the configuration information until the configuration information expires.

[0447] Step 1904: The network device receives the SRS sent by the terminal device on multiple SRS resources (sets).

[0448] Step 1905: The network device performs channel prediction or TDCP measurement based on the received SRS.

[0449] Here, in step 1901, the network device configures multiple SRS resources (sets) with the same purpose, which depends on the implementation of the network device and can be uplink channel prediction, downlink channel prediction, or TDCP measurement. The network device performs operations corresponding to the purpose based on the received SRS.

[0450] As an implementation, if the purpose is uplink channel prediction, the network device performs uplink channel prediction based on the received SRS. As another implementation, if the purpose is downlink channel prediction, the network device performs downlink channel prediction based on the received SRS. As yet another implementation, if the purpose is TDCP measurement, the network device performs TDCP measurement based on the received SRS.

[0451] Here, the specific implementation of uplink channel prediction can refer to the relevant solutions of the aforementioned application example 1. The specific implementation of downlink channel prediction can refer to the relevant solutions of the aforementioned application example 2. The specific implementation of TDCP measurement can refer to the relevant solutions of the aforementioned application example 3.

[0452] Application Example 6

[0453] In this application example, an SRS resource (set) represents an SRS resource or an SRS resource set. The SRS resources (sets) in the multiple SRS resources (sets) are semi-persistent SRS resources with the same period. As shown in FIG20 , this application example includes one or more of the following steps:

[0454] Step 2001: The network device configures multiple SRS resources (sets) for the terminal device through RRC signaling, wherein the multiple SRS resources (sets) are configured with the same period, the same transmission mode, the same transmission resources and the same purpose.

[0455] Here, the specific implementation of the same transmission mode, the same transmission resources and the same purpose can refer to the aforementioned related solutions.

[0456] Step 2002: The terminal device obtains configuration information of multiple SRS resources (sets) based on RRC signaling.

[0457] Here, the specific implementation of the configuration information of multiple SRS resources (sets) can refer to the aforementioned related solutions. It should be noted that the type of the SRS resource (set) is configured in the configuration information of each SRS resource (set), and the type here refers to semi-persistent.

[0458] Step 2003: The network device activates the above configuration information through a MAC CE instruction.

[0459] Step 2004: The terminal device periodically transmits SRS on multiple SRS resources (sets) according to the above configuration information until it receives a MAC CE instructing to deactivate the above configuration information.

[0460] Here, RRC signaling configures the period and time slot offset for each SRS resource (set). The period of multiple SRS resources (sets) is the same, but the time slot offsets are different. After receiving the configuration information for multiple SRS resources (sets), the terminal device needs to wait for the MAC CE indicating the activation of the above configuration information. Once the terminal device receives the MAC CE indicating the activation of the above configuration information, the terminal device periodically transmits SRS on the multiple SRS resources (sets) according to the configuration information until it receives the MAC CE indicating the deactivation of the above configuration information.

[0461] Step 2005: The network device receives the SRS sent by the terminal device on multiple SRS resources (sets).

[0462] Step 2006: The network device performs channel prediction or TDCP measurement based on the received SRS.

[0463] Here, in step 2001, the network device configures multiple SRS resources (sets) with the same purpose, which depends on the implementation of the network device and can be uplink channel prediction, downlink channel prediction, or TDCP measurement. The network device performs operations corresponding to the purpose based on the received SRS.

[0464] As an implementation, if the purpose is uplink channel prediction, the network device performs uplink channel prediction based on the received SRS. As another implementation, if the purpose is downlink channel prediction, the network device performs downlink channel prediction based on the received SRS. As yet another implementation, if the purpose is TDCP measurement, the network device performs TDCP measurement based on the received SRS.

[0465] Here, the specific implementation of uplink channel prediction can refer to the relevant solutions of the aforementioned application example 1. The specific implementation of downlink channel prediction can refer to the relevant solutions of the aforementioned application example 2. The specific implementation of TDCP measurement can refer to the relevant solutions of the aforementioned application example 3.

[0466] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, the technical solution of the present application can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the present application. For example, the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present application will no longer describe the various possible combinations separately. For another example, the various different embodiments of the present application can also be arbitrarily combined, as long as they do not violate the idea of ​​the present application, they should also be regarded as the contents disclosed in the present application. For another example, under the premise of no conflict, the various embodiments and / or the technical features in each embodiment described in the present application can be arbitrarily combined with the prior art, and the technical solution obtained after the combination should also fall within the scope of protection of the present application.

[0467] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0468] FIG21 is a schematic diagram of the first structure of an SRS transmission device provided in an embodiment of the present application, which is applied to a terminal device. As shown in FIG21 , the SRS transmission device includes:

[0469] The sending unit 2101 is configured to send SRS on multiple SRS resources or multiple SRS resource sets. The SRS on the multiple SRS resources or multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

[0470] In some embodiments, the SRS transmission device also includes: a receiving unit 2102, used to receive first configuration information sent by a network device, the first configuration information is used to configure multiple SRS resources or multiple SRS resource sets, wherein the multiple SRS resources or multiple SRS resource sets are configured with the same transmission mode, the same transmission resources and the same purpose.

[0471] In some embodiments, the same transmission mode includes at least one of the following: the same transmission power; the same power control parameter; the same spatial correlation parameter; the same number of antenna ports; the same antenna port.

[0472] In some implementations, the same transmission resource includes at least one of the following: the same symbol index; the same frequency domain resource; the same frequency hopping configuration; the same cyclic shift; and the same SRS base sequence.

[0473] In some embodiments, the use includes at least one of the following: channel prediction, downlink channel prediction, uplink channel prediction, TDCP measurement, and antenna switching.

[0474] In some implementations, the SRS resources among the multiple SRS resources are aperiodic SRS resources triggered by the same signaling; or, the SRS resource sets among the multiple SRS resource sets are aperiodic SRS resource sets triggered by the same signaling.

[0475] In some embodiments, the same signaling is also used to schedule PUSCH, and multiple SRS resources or SRS on multiple SRS resource sets are used to predict the channel state information of PUSCH; or, the same signaling is also used to schedule PDSCH, and multiple SRS resources or SRS on multiple SRS resource sets are used to predict the channel state information of PDSCH.

[0476] In some implementations, the SRS resources in the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period; or, the SRS resource sets in the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period.

[0477] In some embodiments, two adjacent SRS resources among multiple SRS resources are separated by the same number of symbols or the same number of time slots in the time domain; or, two adjacent SRS resource sets among multiple SRS resource sets are separated by the same number of symbols or the same number of time slots in the time domain.

[0478] In some embodiments, the number of symbols is configured by the network device or defined by a protocol or preconfigured; or the number of time slots is configured by the network device or defined by a protocol or preconfigured.

[0479] In some implementations, the sending unit 2101 is further configured to send terminal capability information to the network device, where the terminal capability information is used to indicate a maximum length of time that the terminal device can maintain phase consistency.

[0480] In some embodiments, the terminal device does not expect the duration length corresponding to multiple SRS resources or multiple SRS resource sets to exceed the maximum time length for which the terminal device can maintain phase consistency.

[0481] In some implementations, the receiving unit 2102 is configured to receive first indication information sent by a network device, where the first indication information is used to indicate a first time length;

[0482] The SRS transmission apparatus further includes: a processing unit configured to ensure that the terminal device maintains phase consistency of SRSs transmitted by multiple SRS resources or multiple SRS resource sets within a first time length.

[0483] In some embodiments, the first time length is less than or equal to the maximum time length that the terminal device can maintain phase consistency, or in other words, the first time length is less than or equal to the maximum time length that the terminal device can maintain phase consistency reported.

[0484] In some embodiments, the processing unit is configured to maintain phase consistency among SRSs sent on multiple SRS resources or multiple SRS resource sets within any time window having a first time length.

[0485] In some embodiments, the processing unit is configured to maintain phase consistency of SRSs sent on multiple SRS resources or multiple SRS resource sets within each time window of a first time length starting from a first time domain position, wherein the first time domain position is determined based on a first time domain offset.

[0486] In some implementations, the first time domain offset is configured by the network device or defined by a protocol or preconfigured.

[0487] Those skilled in the art should understand that the relevant description of the above-mentioned SRS transmission device in the embodiment of the present application can be understood with reference to the relevant description of the SRS transmission method in the embodiment of the present application.

[0488] FIG22 is a second schematic diagram of the structure of an SRS transmission device provided in an embodiment of the present application, which is applied to a network device. As shown in FIG22 , the SRS transmission device includes:

[0489] The receiving unit 2201 is configured to receive SRSs sent by a terminal device on multiple SRS resources or multiple SRS resource sets. The SRSs on the multiple SRS resources or multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

[0490] In some embodiments, the SRS transmission device also includes: a sending unit 2202, which is used to send first configuration information to the terminal device, and the first configuration information is used to configure multiple SRS resources or multiple SRS resource sets, wherein the multiple SRS resources or multiple SRS resource sets are configured with the same transmission mode, the same transmission resources and the same purpose.

[0491] In some embodiments, the same transmission mode includes at least one of the following: the same transmission power; the same power control parameter; the same spatial correlation parameter; the same number of antenna ports; the same antenna port.

[0492] In some implementations, the same transmission resource includes at least one of the following: the same symbol index; the same frequency domain resource; the same frequency hopping configuration; the same cyclic shift; and the same SRS base sequence.

[0493] In some embodiments, the use includes at least one of the following: channel prediction, downlink channel prediction, uplink channel prediction, time domain channel characteristic TDCP measurement, and antenna switching.

[0494] In some implementations, the SRS resources among the multiple SRS resources are aperiodic SRS resources triggered by the same signaling; or, the SRS resource sets among the multiple SRS resource sets are aperiodic SRS resource sets triggered by the same signaling.

[0495] In some embodiments, the same signaling is also used to schedule PUSCH, and multiple SRS resources or SRS on multiple SRS resource sets are used to predict the channel state information of PUSCH; or, the same signaling is also used to schedule PDSCH, and multiple SRS resources or SRS on multiple SRS resource sets are used to predict the channel state information of PDSCH.

[0496] In some implementations, the SRS resources in the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period; or, the SRS resource sets in the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period.

[0497] In some embodiments, two adjacent SRS resources among multiple SRS resources are separated by the same number of symbols or the same number of time slots in the time domain; or, two adjacent SRS resource sets among multiple SRS resource sets are separated by the same number of symbols or the same number of time slots in the time domain.

[0498] In some embodiments, the number of symbols is configured by the network device or defined by a protocol or preconfigured; or the number of time slots is configured by the network device or defined by a protocol or preconfigured.

[0499] In some implementations, the receiving unit 2201 is further configured to receive terminal capability information sent by a terminal device, where the terminal capability information is used to indicate a maximum time length for which the terminal device can maintain phase consistency.

[0500] In some embodiments, the sending unit 2202 is used to send a first indication message to the terminal device, where the first indication message is used to indicate a first time length, which is the time length for the terminal device to maintain phase consistency or the time length for the network device to measure SRS.

[0501] In some embodiments, the first time length is less than or equal to the maximum time length that the terminal device can maintain phase consistency, or in other words, the first time length is less than or equal to the maximum time length that the terminal device can maintain phase consistency reported.

[0502] In some implementations, the SRS transmission apparatus further includes: a processing unit configured to perform at least one of the following based on the received SRS: uplink channel state information prediction, downlink channel state information prediction, and TDCP measurement.

[0503] Those skilled in the art should understand that the relevant description of the above-mentioned SRS transmission device in the embodiment of the present application can be understood with reference to the relevant description of the SRS transmission method in the embodiment of the present application.

[0504] Figure 23 is a schematic diagram of a communication device 2300 provided in an embodiment of the present application. The communication device can be a terminal device or a network device. The communication device 2300 shown in Figure 23 includes a processor 2310, which can call and execute a computer program from a memory to implement the method in the embodiment of the present application.

[0505] Optionally, as shown in FIG23 , the communication device 2300 may further include a memory 2320. The processor 2310 may call and execute a computer program from the memory 2320 to implement the method in the embodiment of the present application.

[0506] The memory 2320 may be a separate device independent of the processor 2310 or may be integrated into the processor 2310 .

[0507] Optionally, as shown in FIG23 , the communication device 2300 may further include a transceiver 2330 , and the processor 2310 may control the transceiver 2330 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0508] The transceiver 2330 may include a transmitter and a receiver. The transceiver 2330 may further include an antenna, and the number of antennas may be one or more.

[0509] Optionally, the communication device 2300 may specifically be a network device in an embodiment of the present application, and the communication device 2300 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0510] Optionally, the communication device 2300 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 2300 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0511] Figure 24 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 2400 shown in Figure 24 includes a processor 2410, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0512] Optionally, as shown in FIG24 , the chip 2400 may further include a memory 2420 , wherein the processor 2410 may call and execute a computer program from the memory 2420 to implement the method in the embodiment of the present application.

[0513] The memory 2420 may be a separate device independent of the processor 2410 , or may be integrated into the processor 2410 .

[0514] Optionally, the chip 2400 may further include an input interface 2430. The processor 2410 may control the input interface 2430 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0515] Optionally, the chip 2400 may further include an output interface 2440. The processor 2410 may control the output interface 2440 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0516] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0517] Optionally, the chip can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0518] 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.

[0519] FIG25 is a schematic block diagram of a communication system 2500 provided in an embodiment of the present application. As shown in FIG25 , the communication system 2500 includes a terminal device 2510 and a network device 2520 .

[0520] Among them, the terminal device 2510 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 2520 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they will not be repeated here.

[0521] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0522] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. 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. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0523] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0524] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0525] Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0526] Optionally, the computer-readable storage medium can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0527] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0528] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0529] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0530] The embodiment of the present application also provides a computer program.

[0531] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not described here.

[0532] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0533] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0534] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0535] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0536] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0537] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0538] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0539] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for transmitting a sounding reference signal (SRS), the method comprising: The terminal device sends SRS on multiple SRS resources or multiple SRS resource sets. The SRS on the multiple SRS resources or the multiple SRS resource sets use the same transmission method and the same transmission resources and have phase consistency.

2. The method according to claim 1, wherein: The method further comprises: The terminal device receives first configuration information sent by a network device, where the first configuration information is used to configure the multiple SRS resources or the multiple SRS resource sets, wherein the multiple SRS resources or the multiple SRS resource sets are configured with the same transmission mode, the same transmission resources and the same purpose.

3. The method according to claim 1 or 2, wherein: The same transmission mode includes at least one of the following: Same transmit power; Same power control parameters; Same spatial correlation parameters; Same number of antenna ports; Same antenna port.

4. The method according to any one of claims 1 to 3, wherein: The same transmission resource includes at least one of the following: Same symbol index; Same frequency domain resources; Same frequency hopping configuration; Same circular shift; Same SRS base sequence.

5. The method according to claim 2, wherein: The purposes include at least one of the following: channel prediction, downlink channel prediction, uplink channel prediction, time domain channel characteristic TDCP measurement and antenna switching.

6. The method according to any one of claims 1 to 5, wherein: The SRS resources among the multiple SRS resources are aperiodic SRS resources triggered by the same signaling; or, The SRS resource sets among the multiple SRS resource sets are aperiodic SRS resource sets triggered by the same signaling.

7. The method according to claim 6, wherein: The same signaling is also used to schedule a physical uplink shared channel PUSCH, and the multiple SRS resources or the SRS on the multiple SRS resource sets are used to predict channel state information of the PUSCH; or, The same signaling is also used to schedule a physical downlink shared channel PDSCH, and the multiple SRS resources or the SRS on the multiple SRS resource sets are used to predict channel state information of the PDSCH.

8. The method according to any one of claims 1 to 5, wherein: The SRS resources among the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period; or, The SRS resource sets among the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period.

9. The method according to any one of claims 1 to 8, wherein: Two adjacent SRS resources among the multiple SRS resources are separated by the same number of symbols or the same number of time slots in the time domain; or, Two adjacent SRS resource sets among the multiple SRS resource sets are separated by the same number of symbols or the same number of time slots in the time domain.

10. The method according to claim 9, wherein: The number of symbols is configured by the network device or defined by the protocol or preconfigured; or, The number of time slots is configured by the network device or defined by the protocol or pre-configured.

11. The method according to any one of claims 1 to 10, wherein: The method further comprises: The terminal device sends terminal capability information to the network device, where the terminal capability information is used to indicate a maximum length of time that the terminal device can maintain phase consistency.

12. The method according to any one of claims 1 to 11, wherein: The method further comprises: The terminal device does not expect the duration length corresponding to the multiple SRS resources or the multiple SRS resource sets to exceed the maximum time length for which the terminal device can maintain phase consistency.

13. The method according to any one of claims 1 to 12, wherein: The method further comprises: The terminal device receives first indication information sent by a network device, where the first indication information is used to indicate a first time length, and the terminal device maintains phase consistency among the SRS sent by the multiple SRS resources or the multiple SRS resource sets within the first time length.

14. The method according to claim 13, wherein: The first time length is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency.

15. The method according to claim 13, wherein: The terminal device maintains phase consistency of the SRS sent on the multiple SRS resources or the multiple SRS resource sets within the first time length, including: The terminal device maintains phase consistency of the SRS sent on the multiple SRS resources or multiple SRS resource sets within any time window with a length of the first time length.

16. The method according to claim 13, wherein: The terminal device maintains phase consistency of the SRS sent on the multiple SRS resources or the multiple SRS resource sets within the first time length, including: The terminal device maintains phase consistency of the SRS sent on the multiple SRS resources or multiple SRS resource sets within each time window of the first time length starting from the first time domain position, and the first time domain position is determined based on the first time domain offset.

17. The method according to claim 16, wherein: The first time domain offset is configured by the network device or defined by a protocol or preconfigured.

18. A SRS transmission method, the method comprising: The network device receives the SRS sent by the terminal device on multiple SRS resources or multiple SRS resource sets, where the multiple SRS resources or the SRS on the multiple SRS resource sets use the same transmission method and the same transmission resources and have phase consistency.

19. The method according to claim 18, wherein: The method further comprises: The network device sends first configuration information to the terminal device, wherein the first configuration information is used to configure the multiple SRS resources or the multiple SRS resource sets, wherein the multiple SRS resources or the multiple SRS resource sets are configured with the same transmission mode, the same transmission resources and the same purpose.

20. The method according to claim 18 or 19, wherein: The same transmission mode includes at least one of the following: Same transmit power; Same power control parameters; Same spatial correlation parameters; Same number of antenna ports; Same antenna port.

21. The method according to any one of claims 18 to 20, wherein: The same transmission resource includes at least one of the following: Same symbol index; Same frequency domain resources; Same frequency hopping configuration; Same circular shift; Same SRS base sequence.

22. The method according to claim 19, wherein: The purposes include at least one of the following: channel prediction, downlink channel prediction, uplink channel prediction, time domain channel characteristic TDCP measurement and antenna switching.

23. The method according to any one of claims 18 to 22, wherein: The SRS resources among the multiple SRS resources are aperiodic SRS resources triggered by the same signaling; or, The SRS resource sets among the multiple SRS resource sets are aperiodic SRS resource sets triggered by the same signaling.

24. The method according to claim 23, wherein: The same signaling is also used to schedule a PUSCH, and the multiple SRS resources or the SRSs on the multiple SRS resource sets are used to predict channel state information of the PUSCH; or, The same signaling is also used to schedule PDSCH, and the multiple SRS resources or the SRS on the multiple SRS resource sets are used to predict channel state information of the PDSCH.

25. The method according to any one of claims 18 to 22, wherein: The SRS resources among the multiple SRS resources are periodic SRS resources or semi-persistent SRS resources with the same period; or, The SRS resource sets among the multiple SRS resource sets are periodic SRS resource sets or semi-persistent SRS resource sets with the same period.

26. The method according to any one of claims 18 to 25, wherein: Two adjacent SRS resources among the multiple SRS resources are separated by the same number of symbols or the same number of time slots in the time domain; or, Two adjacent SRS resource sets among the multiple SRS resource sets are separated by the same number of symbols or the same number of time slots in the time domain.

27. The method according to claim 26, wherein: The number of symbols is configured by the network device or defined by the protocol or preconfigured; or, The number of time slots is configured by the network device or defined by the protocol or pre-configured.

28. The method according to any one of claims 18 to 27, wherein: The method further comprises: The network device receives terminal capability information sent by the terminal device, where the terminal capability information is used to indicate a maximum length of time that the terminal device can maintain phase consistency.

29. The method according to any one of claims 18 to 28, wherein: The method further comprises: The network device sends first indication information to the terminal device, where the first indication information is used to indicate a first time length, where the first time length is the time length that the terminal device needs to maintain phase consistency or the time length that the network device measures SRS.

30. The method of claim 29, wherein: The first time length is less than or equal to the maximum time length reported by the terminal device that can maintain phase consistency.

31. The method according to any one of claims 18 to 30, wherein: The method further comprises: The network device performs at least one of the following based on the received SRS: uplink channel state information prediction, downlink channel state information prediction, and TDCP measurement.

32. An SRS transmission device, applied to a terminal device, the device comprising: The sending unit is used to send SRS on multiple SRS resources or multiple SRS resource sets, where the SRS on the multiple SRS resources or the multiple SRS resource sets use the same transmission mode and the same transmission resources and have phase consistency.

33. An SRS transmission device, applied to a network device, comprising: A receiving unit is used to receive SRS sent by a terminal device on multiple SRS resources or multiple SRS resource sets, where the SRS on the multiple SRS resources or the multiple SRS resource sets use the same transmission method and the same transmission resources and have phase consistency.

34. A terminal device, comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory, so that the terminal device executes the method as claimed in any one of claims 1 to 17.

35. A network device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory so that the network device executes the method as claimed in any one of claims 18 to 31.

36. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 17, or a method as claimed in any one of claims 18 to 31.

37. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 31.

38. A computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the method of any one of claims 1 to 17, or any one of claims 18 to 31.

39. A computer program, the computer program causing a computer to execute the method of any one of claims 1 to 17, or any one of claims 18 to 31.

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