SRS closed-loop power control method and apparatus, device, and storage medium

Abstract

A sounding reference signal (SRS) closed-loop power control method and apparatus, a device, and a storage medium, relating to the technical field of communications. The method comprises: when the power control of an SRS is independent of the power control of an uplink data channel, a terminal device keeps at least two sets of closed-loop power control adjustment states for the SRS (610). According to the method, when the power control of an SRS is independent of the power control of an uplink data channel, by keeping at least two sets of closed-loop power control adjustment states, the accuracy of the power control for the SRS can be improved.

Description

SRS closed-loop power control method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to an SRS closed-loop power control method, apparatus, device, and storage medium. Background Art

[0002] When the terminal device sends an SRS (Sounding Reference Signal), the power control of the SRS and the power control of the uplink data channel are consistent or independent of each other.

[0003] In the related art, when SRS power control is independent of uplink data channel power control, there is only one set of closed-loop power control adjustment states (or "closed-loop power control adjustment states"). That is, in the related art, when there are multiple nodes or devices receiving SRS, the closed-loop power control adjustment states in the SRS power control are unique.

[0004] Therefore, further research is needed on the closed-loop power control of SRS.

[0005] Summary of the Invention

[0006] The present invention provides an SRS closed-loop power control method, apparatus, device, and storage medium. The technical solutions provided by the present invention are as follows:

[0007] According to one aspect of an embodiment of the present application, a closed-loop power control method for an SRS is provided. The method is executed by a terminal device, and the method includes:

[0008] In the case where the power control of the SRS is independent of the power control of the uplink data channel, at least two sets of closed-loop power control adjustment states are maintained for the SRS.

[0009] According to one aspect of an embodiment of the present application, a closed-loop power control method for an SRS is provided. The method is performed by a network device, and the method includes:

[0010] When the power control of SRS is independent of the power control of the uplink data channel, first control information is sent to the terminal device, and the first control information is used to adjust the transmission power of the SRS; wherein the first control information is used to determine the transmission power of the SRS corresponding to at least one of the at least two sets of closed-loop power control adjustment states maintained by the terminal device.

[0011] According to one aspect of an embodiment of the present application, an SRS closed-loop power control device is provided, the device comprising:

[0012] The processing module is configured to maintain at least two sets of closed-loop power control adjustment states for the SRS when the power control of the SRS is independent of the power control of the uplink data channel.

[0013] According to one aspect of an embodiment of the present application, an SRS closed-loop power control device is provided, the device comprising:

[0014] A sending module is used to send first control information to a terminal device when the power control of the SRS is independent of the power control of the uplink data channel, wherein the first control information is used to adjust the transmission power of the SRS; wherein the first control information is used to determine the transmission power of the SRS corresponding to at least one of the at least two sets of closed-loop power control adjustment states maintained by the terminal device.

[0015] According to one aspect of an embodiment of the present application, a communication device is provided, comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-mentioned SRS closed-loop power control method on the terminal device side, or to implement the SRS closed-loop power control method on the network device side.

[0016] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is used to be executed by a processor to implement the above-mentioned SRS closed-loop power control method on the terminal device side, or to implement the SRS closed-loop power control method on the network device side.

[0017] According to one aspect of an embodiment of the present application, a computer program product is provided, comprising computer instructions stored in a computer-readable storage medium, wherein a processor reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned SRS closed-loop power control method on the terminal device side, or to implement the SRS closed-loop power control method on the network device side.

[0018] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0019] By making the power control of SRS independent of the power control of the uplink data channel, the terminal device maintains at least two sets of closed-loop power control adjustment states for SRS. The terminal device can use different closed-loop power control adjustment states to control the power of SRS. For example, for different nodes or devices with uplink receiving functions, the appropriate closed-loop power control adjustment state can be selected from at least two sets of closed-loop power control adjustment states to adjust the transmission power of SRS, thereby improving the accuracy of power control. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0021] FIG2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0022] FIG3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application;

[0023] FIG4 is a schematic diagram of a unified TCI (Transceiver Control Interface) state activation / deactivation MAC CE (Media Access Control-Control Element) provided by one embodiment of the present application;

[0024] FIG5 is a schematic diagram of a combined usage scenario of an uplink TRP (Transmitter Receiver Point) and a downlink TRP according to an embodiment of the present application;

[0025] FIG6 is a flowchart of an SRS closed-loop power control method provided by one embodiment of the present application;

[0026] FIG7 is a flowchart of an SRS closed-loop power control method provided by another embodiment of the present application;

[0027] FIG8 is a block diagram of an SRS closed-loop power control device provided by one embodiment of the present application;

[0028] FIG9 is a block diagram of an SRS closed-loop power control device provided by another embodiment of the present application;

[0029] FIG10 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

[0030] FIG11 is a schematic diagram of the structure of a network device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0032] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0033] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity) system. Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system, B5G (Beyound 5G) system, sixth-generation communication (6G) system or other communication systems, etc.

[0034] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), vehicle-to-vehicle (V2V) communication, or vehicle-to-everything (V2X) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0035] The communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, and a standalone (SA) networking scenario.

[0036] The communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, where the authorized spectrum can also be considered as an unshared spectrum.

[0037] The embodiments of the present application can be applied to both non-terrestrial networks (NTN) and terrestrial networks (TN). NTNs generally use satellite communications to provide communication services to terrestrial users. Currently, NTN systems include NR-NTN and IoT-NTN systems, and may include other NTN systems in the future.

[0038] For example, Figure 1 is a schematic diagram of the architecture of a communication system provided by this application. As shown in Figure 1, communication system 100 may include network device 110, which may be a device that communicates with terminal device 120. Network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located within the coverage area.

[0039] Figure 1 exemplarily shows a network device 110 and two terminal devices 120. In some embodiments of the present application, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0040] For example, FIG2 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application. Referring to FIG2 , the communication system may include a terminal device 201 and a satellite 202, and wireless communication may be performed between the terminal device 201 and the satellite 202. The network formed between the terminal device 201 and the satellite 202 may also be referred to as an NTN. In the architecture of the communication system shown in FIG2 , the satellite 202 may have the function of a base station, and the terminal device 201 and the satellite 202 may communicate directly. In this system architecture, the satellite 202 may be referred to as a network device. In some embodiments of the present application, the communication system may include multiple satellites 202, and each network satellite 202 may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0041] For example, FIG3 is a schematic diagram of the architecture of another communication system provided in an embodiment of the present application. Referring to FIG3 , the communication system includes a terminal device 301, a satellite 302, and a base station 303. Wireless communication can be performed between the terminal device 301 and the satellite 302, and communication can be performed between the satellite 302 and the base station 303. The network formed between the terminal device 301, the satellite 302, and the base station 303 can also be referred to as an NTN. In the architecture of the communication system shown in FIG3 , the satellite 302 may not have the function of a base station, and the communication between the terminal device 301 and the base station 303 needs to be transferred through the satellite 302. Under this system architecture, the base station 303 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple base stations 303, each base station 303 may communicate with one or more satellites 302, and each satellite 302 may include other numbers of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0042] In future evolved communication systems such as B5G (Beyond 5G) or 6G, distributed multiple-input multiple-output (Distributed MIMO, also known as distributed antenna system) scenarios and / or massive multiple-input multiple-output (Massive MIMO, also known as massive antenna matrix system) scenarios may also be included. In some cases, Distributed MIMO and / or Massive MIMO can also support cell-free or terminal-centric (UE-centric) network deployment scenarios. It should be understood that the above scenarios are also applicable to TN and / or NTN.

[0043] The terminal devices mentioned in the embodiments of the present application may refer to UE (User Equipment), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent or user device. Optionally, the terminal device 10 may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with wireless communication 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 5GS (5th Generation System) or a terminal device in a future evolved PLMN (Public Land Mobile Network), etc., and the embodiments of the present application are not limited to this. For convenience of description, the above-mentioned devices are collectively referred to as terminal devices. In the embodiments of the present application, "terminal device" and "UE" are often used interchangeably, but those skilled in the art will understand that the two can express the same meaning.

[0044] The network equipment mentioned in the embodiments of the present application may be an access network device, which may be located on the ground or on a satellite. An access network device is a device deployed in an access network to provide wireless communication functions for terminal devices. Access network devices may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different wireless access technologies, the names of devices with access network device functions may be different. For example, in a 5G NR system, they are called gNodeB or gNB. With the evolution of communication technology, the name "access network device" may change. For the convenience of description, in the embodiments of the present application, the above-mentioned devices that provide wireless communication functions for terminal devices are collectively referred to as access network devices. Optionally, a communication relationship can be established between a terminal device and a core network device through the access network device.

[0045] The "5G NR system" in the embodiments of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of the present application may be applicable to LTE systems, 5G NR systems, subsequent evolution systems of 5G NR systems (e.g., B5G systems, 6G systems), and other communication systems such as NB-IoT (Narrow Band Internet of Things) systems, and this application does not limit this.

[0046] In an embodiment of the present application, a network device may provide services for a cell, and a terminal device may communicate with the network device through transmission resources (e.g., frequency domain resources, or spectrum resources) on a carrier used by the cell. The cell may be a cell corresponding to the network device (e.g., a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell. The small cells herein may include: a metro cell, a micro cell, a pico cell, a femto cell, etc. In an embodiment of the present application, when the power control of the SRS is independent of the power control of the uplink data channel, the terminal device maintains at least two sets of closed-loop power control adjustment states for the SRS.

[0047] The following is an explanation of uplink SRS closed-loop power control.

[0048] In a communication system, it is possible to support a special type of TRP, namely the uplink TRP (UL TRP). This TRP only has the ability to receive uplink transmissions, but not the ability to transmit downlink transmissions. There are many advantages to such deployment. For example: 1) The NW can deploy an uplink TRP closer to the UE, thereby reducing the UE's transmit power to achieve the expected receive power. In this case, the NW (Network) can deploy more UL TRPs to reduce the distance between the UE and the TRP, thereby enhancing the uplink coverage capability without increasing the complexity of the UE; 2) When the UE is closer to its own uplink TRP, the interference between multiple users in the uplink can be reduced; 3) For FDD (Frequency division duplex) systems, the uplink TRP can only realize the receiving capability of the uplink spectrum in FDD, and does not require the transmitting capability of the downlink spectrum, thereby reducing the cost of manufacturing and deployment.

[0049] The uplink TRP does not have any downlink transmission capabilities, including PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), CSI-RS (Channel State Information-Reference Signal) and SSB (Synchronization Signal and PBCH Block), and only supports the transmission of uplink channels and / or signals.

[0050] The following is an explanation of the unified transmission status indication (Unified TCI state).

[0051] The concept of TCI states was proposed during the 3GPP (3rd Generation Partnership Project) standardization process. This concept is used to indicate downlink spatial information (QCL-Type D) and transmit QCL (Quasi Co-Location) information (QCL-Type A, QCL-Type B, and QCL-Type C) in the time and / or frequency domains. Specifically, a quasi-co-location (QCL) relationship can be simply described as the relationship between large-scale fading from a source reference signal to a target reference signal. For beam indication (QCL-Type D), after the UE obtains the QCL relationship between the source and target reference signals from the NW, it can use the receive beam that previously received the source reference signal when receiving the target reference signal. If the radio channel properties of one antenna port can be inferred from the radio channel properties of another antenna port, then the two antenna ports are quasi-co-located. Whether two antenna ports are quasi-co-located depends on whether the radio channel properties of the two antenna ports are identical (similar). Common radio channel characteristics at the antenna port include Doppler spread / shift, average delay, delay spread, average gain, and spatial receiver parameters. These properties are called "large-scale properties."

[0052] However, the TCI status indication mechanism is only applicable to downlink channels and signals, and has many limitations in its application in NR systems. In addition, the design is too flexible and has a large signaling overhead, such as always sending the TCI status ID (Identification) in DCI (Downlink Control Information) scheduling. In order to provide a unified uplink and downlink beam management mechanism for the NR system, based on the existing TCI status design, 3GPP proposed the concept of a unified TCI status, which adds important new functions. For example:

[0053] 1) Three unified TCI state modes are designed: joint TCI state applies to both uplink and downlink channels and signals; DL TCI state (Downlink TCI state) applies only to downlink channels and signals; and UL TCI state (Uplink TCI state) applies only to uplink channels and signals.

[0054] 2) Downlink channels (partial PDCCH, PDSCH) and signals (aperiodic CSI-RS) use the same downlink transmit indicator beam, using the DL TCI state or joint TCI state;

[0055] 3) Uplink channels (PUCCH, PUSCH) and signals (SRS) use the same uplink transmit beam and use UL TCI state or joint TCI state;

[0056] 4) Unified TCI state can be indicated using RRC (Radio Resource Control) and / or MAC CE and / or DCI format 1_1 / 1_2 (with and without downlink scheduling information);

[0057] 5) In the scenario of Carrier Aggregation (CA), the beam indication on a single CC (Call Control) can be applied to multiple different CCs at the same time (these CCs with the same beam are configured into a CC list by the network worker).

[0058] 6) Uplink beam indication can be given simultaneously with uplink power control parameters through the UL TCI state or joint TCI state;

[0059] 7) Support beam management function between cells.

[0060] As the name of the Unified TCI state suggests, the term "unified" has multiple meanings. First, "unified" means unifying the uplink and downlink beam indication mechanisms. In the 3GPP NR standard, TCI states are used only for downlink beam indication, while uplink beam indication uses signaling based on spatial relation information. Second, "unified" means unifying beams across different channels. For example, in the Separate DL / UL TCI state, the UE considers the downlink PDCCH (UE-specific) and PDSCH (UE-specific) to be transmitted using the same beam. Furthermore, the UE uses the same beam for uplink PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel). In the Joint TCI state, the UE considers that the different uplink and downlink channels and signals have good beam symmetry, using symmetrical beam pairs for communication.

[0061] The unified TCI status is applied under STRP (Single Transmission Reception Point). R18 supports the indication of the unified TCI status of MTRP (Multiple Transmission Reception Point). However, due to the complexity of the system, it currently only supports the indication of two and / or two pairs of TCI statuses.

[0062] From the signaling level, unified TCI status involves RRC configuration, MAC CE activation / deactivation, and / or DCI dynamic indication.

[0063] When the TCI state is configured using RRC, and the SRS is configured with an uplink / joint TCI state using an indication, the UE also uses the uplink power control parameters associated with the TCI state when sending the SRS.

[0064] When a MAC CE is used to activate / deactivate the TCI state, the structure and description of the MAC CE are as follows. As shown in 400 of Figure 4 , the Unified TCI States Activation / Deactivation MAC CE is identified by a MAC subheader with eLCID. It has a variable size consisting of the following fields.

[0065] Serving Cell ID: This field indicates the identifier of the serving cell to which the MAC CE applies. The field length is 5 bits. Serving Cell ID: This field indicates the identity of the Serving Cell for which the MAC CE applies. The length of the field is 5 bits.If the indicated Serving Cell is configured as part of a simultaneousU-TCI-UpdateList1,simultaneousU-TCI-UpdateList2,simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 as specified in TS 38.331[5],this MAC CE applies to all theServing Cells in the set simultaneousU-TCI-UpdateList1,simultaneousU-TCI-UpdateList2,simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4,respectively;)

[0066] DL BWP ID:This field indicates a DL BWP for which the MAC CE applies as the codepoint of the DCI bandwidth part indicator field as specified in TS 38.212[9].The length of the BWP ID field is 2bits;

[0067] UL BWP ID:This field indicates a UL BWP for which the MAC CE applies as the codepoint of the DCI bandwidth part indicator field as specified in TS 38.212[9].If value of unifiedTCI-StateType in the Serving Cell indicated by Serving Cell ID is joint,this field is considered as the reserved bits.The length of the BWP ID field is 2bits;

[0068] Pi: This field indicates whether each TCI code point has multiple TCI states or a single TCI state. If the Pi field is set to 1, it indicates that the TCI code point includes both DL TCI state and UL TCI state. If the Pi field is set to 0, it indicates that the TCI code point only contains DL / joint TCI state or UL TCI state. The code point to which the TCI state is mapped is determined by its ordinal position in all TCI state ID fields; (P i:This field indicates whether each TCI codepoint has multiple TCI states or single TCI state.If P i field is set to 1,it indicates that i th TCI codepoint includes the DL TCI state and the UL TCI state.If P i field is set to 0,it indicates that i th TCI codepoint includes only the DL / joint TCI state or the UL TCI state.The codepoint to which a TCI state is mapped is determined by its ordinal position among all the TCI state ID fields;)

[0069] D / U: This field indicates whether the TCI state ID in the same octet is for joint / downlink or uplink TCI state. If this field is set to 1, the TCI state ID in the same octet is for joint / downlink. If this field is set to 0, the TCI state ID in the same octet is for uplink.

[0070] TCI State ID: This field indicates the TCI state identified by TCI-StateId, as specified in TS 38.331 [5]. If D / U is set to 1, the 7-bit length of the TCI State ID is the TCI-UL-State-ID specified in TS 38.331 [5]. If D / U is set to 0, the most significant bit of the TCI State ID is considered a reserved bit, and the remaining 6 bits indicate the TCI-UL-State-ID specified in TS 38.331 [5]. The maximum number of activated TCI states is 16. (TCI state ID:This field indicates the TCI state identified by TCI-StateId as specified in TS 38.331[5].If D / U is set to 1,7-bits length TCI state ID ieTCI-StateId as specified in TS 38.331[5]is used.If D / U is set to 0,the most significant bit of TCI state ID is considered as the reserved bit and remainder 6bits indicate the TCI-UL-State-Id as specified in TS 38.331[5].The maximum number of activated TCI states is16.)

[0071] When the DCI indicates a TCI state, the NW uses the TCI state field in DCI format 1_1 / 1_2 to indicate the TCI state(s) the UE should use. For example, if the TCI state field indicates "000" as a code point, it corresponds to the first TCI state ID 1 activated by the MAC CE; and if "111" is another code point, it corresponds to the last TCI state ID 8 activated by the MAC CE.

[0072] Generally, after the MAC CE and / or DCI activates and indicates the uplink / joint TCI state, after a period of beam application time, the indicated TCI state becomes the TCI state to be used for uplink channel and signal transmission, and is used to determine the uplink transmit spatial filter and transmit power.

[0073] The power control of uplink channels and signals is explained below.

[0074] First, let's introduce the PUSCH uplink power control calculation formula and parameters. The PUSCH power control mechanism consists of two parts: open-loop power control and closed-loop power control. Open-loop power control parameters are configured or reconfigured by network equipment through RRC high-layer signaling, and are a slow and semi-static form of power control adjustment. Closed-loop power control allows for rapid power adjustment via physical layer signaling (DCI).

[0075] The calculation of PUSCH power control can be expressed by the following formula:

[0076] Where: b represents bandwidth part (BWP); f represents carrier (uplink carrier or supplementary uplink carrier (SUL) within the cell); c represents serving cell; i represents transmission occasion; j represents parameter configuration index. For example, different service scenarios correspond to different parameter configuration indexes. For example, the parameter configuration index for voice call scenario is 0, while the parameter configuration index for video call scenario is 1; q d : Index of the reference signal used for path loss measurement; l: Index of the closed-loop power control adjustment state.

[0077] The open-loop power control parameters in the above expression include: P O_PUSCH,b,f,c (j): target received power; α b,f,c (j): weighting factor of path loss; PL b,f,c (qd): Path loss value measured based on the reference signal for path loss.

[0078] The closed-loop power control parameters in the above expression include: f b,f,c (i, l): Closed-loop power control adjustment state, including cumulative closed-loop power control (acting on the power control accumulated value through the accumulator) and absolute closed-loop power control (acting directly on the power control adjustment value).

[0079] Other power control parameters in the above expression include: P CMAX,f,c (i): Maximum transmit power of the terminal device on carrier f of serving cell c; PUSCH transmission bandwidth (number of RBs allocated). If the DCI includes the SRS resource indication (SRS resource indication, SRI) field, and if the NR supports the mapping relationship between the open-loop power parameters and the closed-loop power parameters configured through RRC signaling and the SRI field in the DCI, the open-loop power parameters and closed-loop power parameters are indicated by the status in the SRI field in the DCI. PL b,f,c (qd) is the path loss, PL f,f,c (q d )=referenceSignalPower–higher layer filtered RSRP. Among them, "higher layer filtered RSRP" is the RSRP of the higher layer filtering, and RSRP is measured by the terminal device based on the downlink reference signal. Among them, the high-layer parameter referenceSignalPower is determined as follows: If the terminal device is not configured for periodic CSI-RS reception, it is determined by ss-PBCH-BlockPower, and ss-PBCH-BlockPower is the SSB transmission power; if the terminal device is configured for periodic CSI-RS reception, referenceSignalPower is determined according to ss-PBCH-BlockPower, or according to ss-PBCH-BlockPower and powerControlOffsetSS, and powerControlOffsetSS is the power offset of the CSI-RS transmission power relative to the SSB transmission power. Understanding of this formula: referenceSignalPower is the transmit power of the downlink reference signal sent by the network device. Higher layer filtered RSRP is the receive power of the downlink reference signal sent by the network device received by the terminal device. The difference between the two is the path loss.

[0080] Regarding SRS power control, In TS38.213, the transmission power of SRS includes two parts: open-loop power control (P0, PL) and closed-loop power control (h). s : Index of SRS resource set; h b,f,c (i, l): SRS closed-loop power control adjustment state; SRS power control is based on the SRS resource set, and the SRS resources in an SRS resource set use the same power control parameters. Open-loop power control parameter P O_SRS,b,f,c (qs) and α SRS,b,f,c (q s ) and the SRS resource set index used to calculate the path loss PL b,f,c (qd ) are all based on resource set configuration and are configured by RRC signaling. In addition to the above methods, with the introduction of the concept of unified TCI state in R17, each uplink / joint TCI state can contain a set of power control parameters, such as P0, alpha, CLI, etc. b,f,c (i, l) can be indicated by RRC signaling to use the same closed-loop power control adjustment state as the PUSCH associated with the nearest time domain, or to use an independent closed-loop power control adjustment state.

[0081] In related art, f b,f,c (i, l) is the current PUSCH power control adjustment state. For SRS transmission opportunity i, serving cell c, carrier f, and activated UL BWP b, if the SRS power control adjustment state indicates the same power control adjustment state for SRS and PUSCH transmissions, then h b,f,c (i,l)=f b,f,c (i,l). (For the SRS power control adjustment state for active UL BWP b of carrier f of serving cell c and SRS transmission occasion i, h b,f,c (i,l)=f b,f,c (i,l),where f b,f,c (i,l) is the current PUSCH power control adjustment state as described in clause 7.1.1, if srs-PowerControlAdjustmentStates indicates a same power control adjustment state for SRS transmissions and PUSCH transmissions. )

[0082] Alternatively, if the UE is not configured for PUSCH transmission on the activated UL BWP b of carrier f of serving cell c, or if the SRS power control adjustment state indicates separate power control adjustment states between SRS transmission and PUSCH transmission, and if TPC (Transmit Power Control) accumulation is not provided, then Among them, Table 7.1.1-1 gives δ SRS,b,f,c value. is the K before SRS transmission opportunity i-i_0 on the activated UL BWP b of carrier f of serving cell c in SRS power control adjustment state of UE SRS (i-i0)-1 symbol and K before SRS transmission opportunity i SRS The cardinality of the received symbols between (i) is C(S i ) of the TPC command value set S i The sum of the TPC command values ​​in K, where i0>0 is SRS (i) The smallest integer preceding the symbol. if the UE is not configured for PUSCH transmissions on active UL BWP b of carrier f of serving cell c,or if srs-PowerControlAdjustmentStates indicates separate power control adjustment states between SRS transmissions and PUSCH transmissions,and if tpc-Accumulation is not provided,Theδ SRS,b,f,c values ​​are given in Table7.1.1-1, is a sum of TPC command values ​​in a set S i of TPC command values ​​with cardinality C(S i )that the UE receives between K SRS (i-i0)-1symbols before SRS transmission occasion i-i0and K SRS (i)symbols before SRS transmission occasion i on active UL BWP b of carrier f of serving cell c for SRS power control adjustment state,where i0>0is the smallest integer for which K SRS(i)symbols before SRS transmission occasion i-i0is earlier than K SRS (i-i0)symbols before SRS transmission occasion i.)

[0083] Alternatively, if the UE is not configured for PUSCH transmission on the activated UL BWP b of carrier f of serving cell c, or if the SRS power control adjustment state indicates separate power control adjustment states between SRS transmission and PUSCH transmission, and TPC accumulation is provided, then h b,f,c (i) = δ SRS,b,f,c (i). Among them, the UE K before the first symbol of SRS transmission opportunity i SRS,min DCI format 2_3 is detected for each symbol. b,f,c (i) = δ SRS,b,f,c (i)if the UE is not configured for PUSCH transmissions on active UL BWP b of carrier f of serving cell c,or if srs-PowerControlAdjustmentStates indicates separate power control adjustment states between SRS transmissions and PUSCH transmissions,and tpc-Accumulation is provided,and the UE detects a DCI format 2_3 K SRS,min symbols before a first symbol of SRS transmission occasion i,where absolute values ​​of δ SRS,b,f,c are provided in Table 7.1.1-1.)

[0084] The following describes SRS power control in DCI format 2_3. DCI format 2_3 uses a special CRC for scrambling, namely TPC-SRS-RNTI, and transmits the following information: block number 1, block number 2, …, block number N. The starting position of each block is configured by higher-layer signaling such as RRC. Each block contains the following information: an SRS request (0 or 2 bits) and a TPC command (2 bits).

[0085] In each TPC command, if it is a cumulative closed-loop power control adjustment state, then the value of each power control adjustment is one of the set {-1, 0, 1, 3}; if it is an absolute value (non-cumulative) closed-loop power control adjustment state, then each adjustment value is one of the set {-4, -1, 1, 4}, as shown in Table 1.

[0086] Table 1. TPC command field for scheduling PUSCH transmission in DCI format, or TPC-PUSCH-RNTI affecting CRC in DCI format 2_2, or mapping absolute and cumulative δPUSCH,b,f,c values ​​or δ in DCI format 2_3. SRS,b,f,c value

[0087] In the related art, as shown in FIG5 , a schematic diagram of the combined use scenario of uplink TRP and downlink TRP is given. As shown in FIG5 , the UE needs to send SRS to the two TRPs respectively. That is, the UE needs to send SRS to the UL-only TRP (uplink-only TRP) 510 and the conventional TRP 520 respectively. For any TRP, the NW configures at least one SRS resource set and the corresponding RRC parameters to perform uplink power control. According to the above-mentioned SRS power control formula, when SRS and PUSCH use closed-loop power control respectively, SRS has only one set of closed-loop power control adjustment states regardless of which SRS resource set it comes from. That is, when the closed-loop power control of SRS and PUSCH is different, since there is only one set of closed-loop power control adjustment states, there is no variable l in the formula of the closed-loop power control adjustment state of SRS. Correspondingly, in DCI format 2_3, the TPC command of SRS does not have an indication of CLI (Closed-loop index).

[0088] Considering the power control problem of multiple TRPs, one set of closed-loop power control adjustment states is not enough. Based on the above considerations, the present application proposes an SRS closed-loop power control method, which aims to enable the terminal device to maintain at least two sets of closed-loop power control adjustment states when the power control of the SRS is independent of the power control of the uplink data channel, so that when targeting different nodes or devices with uplink receiving functions, the closed-loop power control adjustment state suitable for the node or device can be selected from at least two sets of closed-loop power control adjustment states to adjust the SRS transmission power, thereby improving the accuracy of the SRS power adjustment.

[0089] Please refer to Figure 6, which shows a flow chart of an SRS closed-loop power control method provided by an embodiment of the present application. The method may include the following steps:

[0090] Step 610: When the power control of the SRS is independent of the power control of the uplink data channel, the terminal device maintains at least two sets of closed-loop power control adjustment states for the SRS.

[0091] When the power control of the SRS is consistent with the power control of the uplink data channel, the power control of the SRS is performed according to the power control of the uplink data channel. Here, reference can be made to the explanations in the above embodiments and will not be repeated. The embodiments of the present application are proposed based on the case where the power control of the SRS is independent of the power control of the uplink data channel. When the power control of the SRS is independent of the power control of the uplink data channel, two sets of closed-loop power control adjustment states are maintained for the SRS.

[0092] In some embodiments, the SRS is called a sounding reference signal. In wireless communications, the SRS is used to estimate uplink channel frequency domain information for frequency selective scheduling, or to estimate downlink channels for downlink beamforming.

[0093] In some embodiments, an uplink data channel is a channel that supports carrying data information. The uplink data channel can be a data channel, which can be a data channel used for uplink transmission and supports carrying data information, and can be referred to as an uplink data channel. In some embodiments, the uplink data channel is a PUSCH, which supports carrying uplink data information. Of course, as communication technology evolves, the name of the uplink data channel may change, such as no longer being called PUSCH but being called another name, and this application does not limit this.

[0094] In some embodiments, closed-loop power control is a type of power control. In closed-loop power control, the transmitter's power is dynamically adjusted based on the receiver's reception performance. Closed-loop power control is a control method in which the transmitter's power is dynamically adjusted based on the receiver's reception performance. If the receiver determines that the performance is poor, it can request that the transmitter increase the power; if the receiver determines that the performance is excellent, it can request that the transmitter reduce the power. Closed-loop power control is performed jointly by the transmitter and receiver. In some embodiments, the closed-loop power control process includes a feedback control loop. The receiver compares the received signal quality with the expected signal quality and issues a command (such as a TPC command) to increase or decrease the transmitter's power. The transmitter executes this command, and this cycle repeats. In other embodiments, power control also includes open-loop power control. In open-loop power control, the transmitter subjectively determines the transmit power level. In other words, the transmitter's transmit power is independent of the receiver's. In embodiments of the present application, the transmitter can be implemented as a terminal device, and the receiver can be implemented as a network device.

[0095] In some embodiments, the closed-loop power control adjustment state can be understood as a method or means for adjusting the closed-loop power control. In related art, when the power control of the SRS is independent of the power control of the uplink data channel, the closed-loop power control adjustment state of the SRS is unique, regardless of the number or type of receiving ends. In the embodiments of the present application, given that the power control of the SRS is independent of the power control of the uplink data channel, the terminal device maintains at least two sets of closed-loop power control adjustment states. For example, assuming that the terminal device maintains N sets of closed-loop power control adjustment states (closed-loop power control adjustment state 1, closed-loop power control adjustment state 2, ..., closed-loop power control adjustment state N, where N is a positive integer not less than 2), the terminal device uses closed-loop power control adjustment state 1 to adjust the power of the SRS and transmits the SRS to the corresponding receiving end 1 (or node or device 1 with uplink receiving functionality) based on the adjusted power. The terminal device uses closed-loop power control adjustment state 2 to adjust the power of the SRS and transmits the SRS to the corresponding receiving end 2 (or node or device 2 with uplink receiving functionality) based on the adjusted power. The terminal device uses the closed-loop power control adjustment state N to perform power control adjustment on the SRS, and sends the SRS to the corresponding receiving end N (or a node or device N with an uplink receiving function) according to the adjusted power.

[0096] In other embodiments, the terminal device stores at least two sets of closed-loop power control adjustment states. That is, the at least two sets of closed-loop power control adjustment states are stored in the terminal device, and the terminal device selects the corresponding closed-loop power control adjustment state according to the requirements of the received downlink signal.

[0097] In other embodiments, the at least two sets of closed-loop power control adjustment states may be pre-stored in the network device. Alternatively, the network device may transmit the at least two sets of closed-loop power control adjustment states to the terminal device simultaneously with the downlink signal instructing the terminal device to perform SRS power control. In this manner, on-demand loading of the closed-loop power control adjustment states is achieved, reducing the storage cost of the closed-loop power control adjustment states in the terminal device.

[0098] In some embodiments, each closed-loop power control adjustment state corresponds to a device or node with an uplink receiving function. In some embodiments, the device or node with the uplink receiving function may only include an uplink receiving function, such as the UL-only TRP (uplink-only TRP) in Figure 5. In other embodiments, the device or node with the uplink receiving function may include not only an uplink receiving function, but also a downlink transmission function, such as the conventional TRP in Figure 5. Of course, in the embodiments of the present application, the specific name of the device or node with an uplink receiving function corresponding to each closed-loop power control adjustment state is not limited, and any device or node with an uplink receiving function can be used as the device or node corresponding to the closed-loop power control adjustment state.

[0099] In some embodiments, the terminal device sends first capability information to the network device, where the first capability information indicates whether the terminal device maintains at least two sets of closed-loop power control adjustment states for the SRS. In some embodiments, the terminal device sends the first capability information via a first channel. The first channel is a channel that supports carrying data information. The first channel can be a data channel, which can be a data channel for uplink transmission, which supports carrying data information and can also be referred to as an uplink data channel. In some embodiments, the first channel is a PUSCH, which supports carrying uplink data information.

[0100] In some embodiments, the first capability information is in an information format for indicating whether the terminal device maintains at least two sets of closed-loop power control adjustment states for the SRS. In some embodiments, after the terminal device sends the first capability information to the network device, the network device can learn from the first capability information whether the terminal device maintains at least two sets of closed-loop power control adjustment states for the SRS.

[0101] In some embodiments, when the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS, the first capability information is further used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, where N is an integer greater than or equal to 1. Exemplarily, different carriers may correspond to different power control adjustment states, or to the same power control adjustment state. Exemplarily, the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers is sent to the network device. In some embodiments, the terminal device reports to the network device the maximum number of closed-loop power control adjustment states supported within a serving cell.

[0102] In some embodiments, the terminal device implements capability reporting by sending first capability information to the network device. The first capability information is used to inform the network device whether the terminal device maintains (or supports) at least two sets of closed-loop power control adjustment states, that is, the first capability information indicates whether the terminal device has the ability to support at least two sets of closed-loop power control adjustment states. In other embodiments, the first capability information, while indicating that the terminal device supports at least two sets of closed-loop power control adjustment states, can also indicate the maximum number of closed-loop power control adjustment states supported by the terminal device. The terminal device informs the network device whether it supports at least two sets of closed-loop power control adjustment states by reporting capabilities. If supported, the terminal device simultaneously reports the maximum number of closed-loop power control adjustment states supported in a service cell. The maximum number of supported closed-loop power control adjustment states can be included in the first capability information, or can be reported separately by the terminal device.

[0103] The following is an exemplary description of how to adjust the SRS transmit power according to the closed-loop power control adjustment state.

[0104] In some embodiments, the terminal device receives first control information sent by the network device, where the first control information is used to adjust the transmission power of the SRS.

[0105] In an embodiment of the present application, a network device sends first control information to a terminal device to instruct the terminal device to adjust the transmit power of an SRS. Exemplarily, the network device sends the first control information to the terminal device via a downlink channel, where the downlink channel is a channel with downlink data transmission capabilities. Exemplarily, the first control information is in an information format used by the terminal device to adjust the transmit power of the SRS.

[0106] In some embodiments, the terminal device determines, based on the first control information, the transmit power of the SRS corresponding to at least one of the at least two closed-loop power control adjustment states.

[0107] In some embodiments, the first control information includes identification information indicating a target closed-loop power control adjustment state, where the target closed-loop power control adjustment state is one of at least two sets of closed-loop power control adjustment states. Exemplarily, the transmit power of the SRS is adjusted using the target closed-loop power control adjustment state.

[0108] In the embodiment of the present application, a network device sends first control information to a terminal device, and the terminal device further determines at least one of at least two sets of closed-loop power control adjustment states based on the first control information. This helps improve the accuracy of the closed-loop power control adjustment state used for SRS power adjustment. In other words, rather than randomly selecting a closed-loop power control adjustment state, the closed-loop power control state is selected based on instructions from the network device, which helps ensure effective power adjustment.

[0109] Of course, specifically how to determine the SRS transmit power corresponding to at least one of the at least two closed-loop power control adjustment states according to the first control information includes at least one of the following methods 1 and 2.

[0110] Method 1: For the i-th carrier, the transmit power of the SRS corresponding to the i-th carrier is determined according to the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier.

[0111] At this time, the first control information includes: a TPC command and first index indication information corresponding to each of the N carriers; wherein, the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0112] In some embodiments, the first control information sent by the network device to the terminal device includes TPC commands corresponding to N carriers and first index indication information corresponding to N carriers.

[0113] In some embodiments, the TPC command is a command sent by the network device to instruct the terminal device to perform transmit power control. In some embodiments, the terminal device transmits data to the network device via M carriers, where M is a positive integer greater than or equal to N, and different carriers correspond to different transmit powers. In some embodiments, the network device sends first control information to the terminal device, where the first control information includes TPC commands corresponding to N carriers of the M carriers and first index indication information corresponding to each of the N carriers.

[0114] In some embodiments, the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier. The embodiment of the present application does not limit the specific form of the first index indication information. The form of the first index indication information can be at least one of a number, a vector, etc. In some embodiments, the first index indication information can be represented by N bits, where N is a positive integer, which can indicate at most 2 N For example, when N is equal to 1, the first index indication information can indicate at most 2 different closed-loop power control adjustment states. For example, when N is equal to 2, the first index indication information can indicate at most 4 different closed-loop power control adjustment states.

[0115] In some embodiments, the first index indication information is a CLI (Closed-loop index). In some embodiments, when the terminal device maintains two sets of closed-loop power control adjustment states, the indexes corresponding to the two sets of closed-loop power control adjustment states are l = {0, 1}, where 0 indicates the first set of closed-loop power control adjustment states and 1 indicates the second set of closed-loop power control adjustment states.

[0116] In some embodiments, the formula for the SRS transmit power is as follows:

[0117] Its closed loop part h b,f,c (i, l) includes the CLI index l. In the related art, when it is known that the power control of the SRS is independent of the power control of the uplink data channel, the index l does not exist because there is only one closed-loop power control adjustment state. See the above embodiment for details and will not be repeated here. In the embodiment of the present application, even when the power control of the SRS is independent of the power control of the uplink data channel, multiple sets of closed-loop power control adjustment states exist, so the index l is required.

[0118] Specifically,

[0119] where h b,f,c (i-i0, l) is the closed-loop power control cumulative amount corresponding to the closed-loop power control adjustment state index l at the time (i-i0); δ SRS,b,f,c (m, l) is the TPC command of the closed-loop power control adjustment state index l indicated by the NW for SRS through DCI format 2_3.

[0120] In some embodiments, the first control information is DCI format 2_3. First index indication information (ie, CLI) is introduced into DCI format 2_3 to indicate for which closed-loop power control adjustment state index the transmit power control is effective.

[0121] In some embodiments, when the RRC parameter srs-TPC-PDCCH-Group=typeA, for power control of multiple uplink carriers, there can be N TPC commands and corresponding N CLI indications in one DCI format 2_3, and there is a one-to-one correspondence between CLI and TPC commands.

[0122] In some embodiments, if the UE is configured with higher layer parameter srs-TPC-PDCCH-Group=typeA for an UL without PUCCH and PUSCH or an UL on which the SRS power control is not tied with PUSCH power control, one block is configured for the UE by higher layers, with the following fields defined for the block.

[0123] In some embodiments, SRS request is 0 or 2 bits. The presence of this field is according to the definition in Clause 11.4 of [5, TS38.213]. If present, this field is interpreted as defined by Table 7.3.1.1.2-24.

[0124] In some embodiments, TPC command number 1, TPC command number 2, ..., TPC command number N, where each TPC command applies to a respective UL carrier provided by higher layer parameter cc-IndexInOneCC-Set.

[0125] In some embodiments, closed loop indicator 1, closed loop indicator 2, ..., closed loop indicator N, where each CLI (closed loop power control index) corresponds to each TPC command applied to the respective UL carrier.

[0126] In some embodiments, if the UE is configured with the high-layer parameter srs-PowerControlAdjustmentStates to apply the same closed-loop power control as PUSCH, this bit is 0. Otherwise, each of the n bits indicates whether the index is 0 or 1. (-0 bit if the UE is configured with the high-layer parameter srs-PowerControlAdjustmentStates to apply the same closed-loop power control as PUSCH. -N bit with each bit to indicate whether l is 0 or 1, otherwise.)

[0127] In some embodiments, when the RRC parameter srs-TPC-PDCCH-Group=typeB, for power control of one uplink carrier, there is only one TPC command in one DCI format 2_3, and corresponds to one CLI indicator.

[0128] That is, the first control information may include only the TPC command corresponding to one carrier and the first index indication information corresponding to the carrier, or may include the TPC commands corresponding to multiple carriers and the first index indication information corresponding to the multiple carriers.

[0129] In the embodiment of the present application, a network device sends first control information to a terminal device to inform the terminal device of the index of the closed-loop power control adjustment state of the uplink channel or signal corresponding to different carriers. The terminal device obtains the corresponding closed-loop power control adjustment state based on the first index indication information corresponding to each carrier, and uses the closed-loop power control adjustment state to adjust the transmit power of the uplink channel or signal corresponding to the carrier, thereby improving the accuracy of the adjustment of the transmit power of the uplink channel or signal.

[0130] Method 2: For the i-th carrier, determine the closed-loop power control adjustment state corresponding to the i-th carrier based on the indicated TCI state corresponding to the i-th carrier and the correspondence between the indicated TCI state and the closed-loop power control adjustment state; determine the transmit power of the uplink channel or signal corresponding to the i-th carrier based on the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier; wherein the uplink channel or signal includes the SRS.

[0131] At this time, the first control information includes: a TPC command and second index indication information corresponding to each of the N carriers; wherein, the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the indicated TCI state corresponding to the i-th carrier, and there is a correspondence between the indicated TCI state and the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0132] In some embodiments, the first control information sent by the network device to the terminal device includes TPC commands corresponding to N carriers and second index indication information corresponding to N carriers.

[0133] In some embodiments, the TPC command is a command sent by the network device to instruct the terminal device to perform transmit power control. In some embodiments, the terminal device transmits data to the network device via M carriers, where M is a positive integer greater than or equal to N, and different carriers correspond to different transmit powers. In some embodiments, the network device sends first control information to the terminal device, where the first control information includes TPC commands corresponding to N carriers of the M carriers and second index indication information corresponding to each of the N carriers.

[0134] In some embodiments, the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the TCI state indicated by the i-th carrier. The embodiment of the present application does not limit the specific form of the second index indication information. The second index indication information can be in the form of a number or other form. In some embodiments, the second index information corresponding to the i-th carrier is an information format for indicating the index of the TCI state indicated by the i-th carrier. In some embodiments, the second index indication information can be represented by N bits, where N is a positive integer, which can indicate up to 2 N For example, when N is equal to 1, the second index indication information can indicate at most 2 different TCI states. For example, when N is equal to 2, the second index indication information can indicate at most 4 different TCI states.

[0135] In some embodiments, a corresponding relationship exists between TCI states and closed-loop power control adjustment states. For example, for possible TCI states, the corresponding relationship between TCI states and closed-loop power control adjustment states is preset by a terminal device, issued by a network device, or specified by a protocol. The possible TCI states may include all TCI states or common TCI states. This application does not limit the specific categories of TCI states that correspond to closed-loop power control adjustment states.

[0136] In other embodiments, a corresponding relationship exists between the indicated TCI state and the closed-loop power control adjustment state. For example, the corresponding relationship between the indicated TCI state and the closed-loop power control adjustment state is preset by the terminal device, issued by the network device, or specified by the communication protocol.

[0137] Exemplarily, the following description is made for the preset correspondence of the terminal device. In some embodiments, the terminal device stores in advance the correspondence between the TCI state and the closed-loop power control adjustment state. In other embodiments, the terminal device stores in advance the correspondence between the TCI state that can be indicated by the second index indication information and the closed-loop power control adjustment state. At this time, the network device only needs to indicate the index of the TCI state through the first control information, and no specific index of the closed-loop power control adjustment state is required. That is, when it is necessary to perform power control on the target channel and SRS at the same time, in method 1, the network device needs to send the index of the closed-loop power control adjustment state (i.e., the first index indication information) to the terminal device separately for the SRS, and needs to send the index indicating the TCI state (i.e., the second index indication information) to the terminal device for the target channel. Therefore, the network device needs to send at least two signalings to achieve simultaneous power adjustment of the target signal and SRS. In method 2 of the present application, when power control is also performed on the SRS, the network device sends an index indicating the TCI state to the terminal device for both the SRS and the target channel. In other words, the task of adjusting the power of the target signal and SRS, which originally required two signaling operations, is combined into a single signaling operation, thereby reducing signaling overhead. The target channel refers to an uplink control channel and / or an uplink data channel.

[0138] Exemplarily, the following description is made with respect to the correspondence relationship sent by the network device. In some embodiments, the network device always stores the correspondence between the TCI state and the closed-loop power control adjustment state. When the network device sends the first control information to the terminal device for the first time, the correspondence between the TCI state and the closed-loop power control adjustment state is sent. When the first control information is sent again, there is no need to send the correspondence between the TCI state and the closed-loop power control adjustment state again, thereby realizing on-demand loading of the correspondence relationship and also reducing signaling overhead. In other embodiments, the network device always stores the correspondence between the TCI state indicated in the storage medium and the closed-loop power control adjustment state. When the network device sends the first control information to the terminal device for the first time, the correspondence between the indicated TCI state and the closed-loop power control adjustment state is sent. When the first control information is sent again, if the indicated TCI state has not changed, there is no need to send the correspondence between the indicated TCI state and the closed-loop power control adjustment state again. If the indicated TCI state changes, the correspondence between the indicated TCI state and the closed-loop power control adjustment state is sent again, thereby realizing on-demand loading of the correspondence and also reducing signaling overhead.

[0139] Exemplarily, an exemplary description is given of the correspondence relationship specified in the communication protocol. In some embodiments, the communication protocol specifies the correspondence relationship between the TCI state and the closed-loop power control adjustment state. For example, the communication protocol specifies the correspondence relationship between all possible TCI states and the closed-loop power control adjustment state. Alternatively, the communication protocol specifies the correspondence relationship between at least two sets of closed-loop power control adjustment states supported by the terminal device and the TCI state, or the communication protocol specifies the correspondence relationship between the TCI state that can be indicated by the second index indication information and the closed-loop power control adjustment state. The manner in which the correspondence relationship is specified by the communication protocol eliminates the need for additional signaling to indicate the correspondence relationship, thereby reducing signaling transmission overhead.

[0140] In some embodiments, the first control information is DCI format 2_2. The second index indication information is introduced into DCI format 2_2 to indicate the DCI state, and the corresponding closed-loop power control adjustment state is further found through the corresponding relationship.

[0141] In some embodiments, the uplink channel or signal further includes: an uplink control channel and / or an uplink data channel. In some embodiments, the uplink control channel is a channel that carries control information and supports carrying control information, and may be referred to as an uplink control channel. In some embodiments, the uplink control channel is a PUCCH, which supports carrying uplink control information. Of course, as communication technology evolves, the name of the uplink control channel may change, such as no longer being called PUCCH but being called another name, and this application does not limit this.

[0142] In some embodiments, in addition to SRS, power control may also be performed on other uplink channels or signals other than SRS, such as uplink control channels and / or uplink data channels. For example, power control adjustment may be performed on PUSCH or PUCCH.

[0143] In some embodiments, the TCI state is an uplink TCI state or a combined TCI state. The second index indication information may be used to index the uplink TCI state or the combined TCI state, which is not limited in this application.

[0144] In some embodiments, the closed-loop power control TPC indication for PUCCH or PUSCH in DCI format 2_2 can be combined with the closed-loop power control TPC indication for SRS in DCI format 2_3 into one DCI signaling. This embodiment uses the indicated uplink / joint TCI state for closed-loop power control. The uplink / joint TCI state indicated by the second index indication information applies not only to SRS (in units of SRS resource sets), but also to uplink PUCCH and PUSCH. This is due to the characteristics of the unified TCI state, which can reduce the signaling overhead of DCI for closed-loop power control.

[0145] The SRS power calculation formula requires a slight adjustment for the closed-loop power control portion. This involves replacing the indicated CLI (Closed-Loop Power Control Index) with the TCI state index (secondary index indication information) k = {0, 1}, where 0 indicates the uplink TCI state and 1 indicates the combined TCI state. Of course, considering compatibility with the previous example, a maximum of K (K > 2) uplink / combined TCI states can be indicated, i.e., k = {0, 1, ..., K}.

[0146] In some embodiments, if the UE is configured with higher layer parameter srs-TPC-PDCCH-Group=typeA for an UL without PUCCH and PUSCH or an UL on which the SRS power control is not tied with PUSCH power control, one block is configured for the UE by higher layers, with the following fields defined for the block.

[0147] In some embodiments, the SRS request is 0 or 2 bits.

[0148] In some embodiments, TPC command number 1, TPC command number 2, ..., TPC command number N, where each TPC command applies to a respective UL carrier provided by higher layer parameter cc-IndexInOneCC-Set.

[0149] In some embodiments, UL / joint TCI state indicator 1, UL / joint TCI state indicator 2, ..., UL / joint TCI state indicator N, where each UL / joint TCI state indicator corresponds to each TPC command applied to the respective UL carrier.

[0150] In some embodiments, each bit in the N-bit UL / joint TCI state indicator singals that TPC command should be associated with either the 1st or the 2nd indicated UL / joint TCI state.

[0151] In some embodiments, if the UE is configured with higher layer parameter srs-TPC-PDCCH-Group=typeB for an UL without PUCCH and PUSCH or an UL on which the SRS power control is not tied with PUSCH power control, one block or more blocks is configured for the UE by higher layers where each block applies to an UL carrier, with the following fields defined for each block.

[0152] In some embodiments, the SRS request is 0 or 2 bits.

[0153] In some embodiments, the TPC command is 2 bits.

[0154] In some embodiments, a UL / joint TCI state indicator is provided. It indicates that the TPC command should be associated with either the 1st or the 2nd indicated UL / joint TCI state.

[0155] In some embodiments, the UL / Joint TCI status indicator is 1 bit.

[0156] In some embodiments, each uplink / joint TCI state may include a CLI, which points to the closed-loop power control adjustment state index l = {0, 1}. Upon receiving DCI format 2_3, the UE can determine which uplink / joint TCI state the TPC command is associated with and, when transmitting PUCCH / PUSCH / SRS uplink using that uplink / joint TCI state, use the corresponding TPC command to adjust power. This approach offers the advantage of applying the TPC command not only to SRS but also to other uplink channels, such as PUCCH / PUSCH, thus saving additional signaling overhead.

[0157] The following is an exemplary description of the combination of method 1 and method 2.

[0158] In some embodiments, the first control information includes: a transmit power control TPC command and first index indication information corresponding to each of the M carriers; wherein the first index indication information corresponding to the m-th carrier among the M carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the m-th carrier, M is an integer greater than or equal to 1, and m is a positive integer less than or equal to M. In other embodiments, the first control information also includes a TPC command and second index indication information corresponding to each of the N carriers; wherein the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the indicated TCI state corresponding to the i-th carrier, and there is a corresponding relationship between the indicated TCI state and the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N. There is no overlap between the above-mentioned M carriers and N carriers.

[0159] Exemplarily, for the mth carrier among the M carriers, the transmit power of the SRS corresponding to the mth carrier is determined according to the TPC command corresponding to the mth carrier and the closed-loop power control adjustment state corresponding to the mth carrier.

[0160] Exemplarily, for the i-th carrier among N carriers, the closed-loop power control adjustment state corresponding to the i-th carrier is determined based on the indicated TCI state corresponding to the i-th carrier and the correspondence between the indicated TCI state and the closed-loop power control adjustment state; the transmit power of the uplink channel or signal corresponding to the i-th carrier is determined based on the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier.

[0161] That is, for the transmit power of the uplink channels or signals corresponding to N carriers, one portion is determined according to Method 1, and the other portion is determined according to Method 2. For nodes or devices with conventional TRP at the receiving end, that is, with both uplink and downlink transmissions, Method 1 is used to determine the closed-loop power control adjustment states corresponding to different carriers, and further to obtain the transmit power of the SRS. For nodes or devices with uplink TRP at the receiving end, that is, with uplink transmissions, Method 2 is used to determine the closed-loop power control adjustment states corresponding to different carriers, and further to obtain the transmit power of different channels.

[0162] First, for the uplink TRP, the network network (NW) configures SRS resource set A to follow the closed-loop power control of the PUSCH. Only when l equals a specific index (0 or 1), i.e., l = 0 or 1 for the uplink TRP, does the SRS use the same closed-loop power control (TPC) command as the PUSCH. This TPC (Transmit Power Control) command is sent by the NW to the UE via DCI format 2_2. The SRS resource set configuration type is either "codebook-based" or "non-codebook-based" for uplink PUSCH transmission.

[0163] Secondly, for a conventional TRP in both uplink and downlink, the NW usually does not configure or schedule the UE to send PUCCH or PUSCH toward that TRP, so it is not possible to use the same closed-loop power control TPC command as the PUSCH and directed to that TRP to send the SRS of SRS resource set B. The configuration type of this SRS resource set can be based on "antenna switching" or "beam management".

[0164] When the UE sends SRS resource set B to the uplink and downlink TRP, the UE uses the TPC command in DCI format 2_3. This TRP command is not applicable to the SRS of SRS resource set A.

[0165] By configuring (RRC) according to the above scheme and indicating the closed-loop power control TPC of PUSCH (DCI format 2_2) and SRS (DCI format 2_3), the UE can achieve independent closed-loop power control adjustment status for different TRPs.

[0166] The following is an exemplary description of how to determine whether the power control of the SRS is independent of the power control of the uplink data channel.

[0167] In some embodiments, the terminal device receives first configuration information sent by the network device, where the first configuration information is used to configure whether the power control of the SRS is independent of the power control of the uplink data channel.

[0168] In some embodiments, the network device sends first configuration information to the terminal device via a downlink channel, where the first configuration information is used to configure whether the power control of the SRS is independent of the power control of the uplink data channel.

[0169] In some embodiments, when the first configuration information is used to configure the power control of the SRS to be independent of the power control of the uplink data channel, the transmit power of the SRS is determined based on the first control information, and the first control information is used to adjust the transmit power of the SRS.

[0170] In some embodiments, when the first configuration information is used to configure the power control of the SRS to follow the power control of the uplink data channel, the transmission power of the uplink data channel is determined based on the second control information, and the transmission power of the SRS is the same as the transmission power of the uplink data channel, and the second control information is used to adjust the transmission power of the uplink data channel.

[0171] In some embodiments, the second control information is used to adjust the transmission power of the uplink data channel. Please refer to the explanation of the above embodiment and will not be repeated here.

[0172] In some embodiments, when the power control of the SRS is independent of the power control of the uplink data channel, the transmit power of the SRS is adjusted according to the first control information. When the power control of the SRS follows the power control of the uplink data channel, the transmit power of the uplink data channel is determined based on the second control information, and the transmit power of the SRS is the same as the transmit power of the uplink data channel.

[0173] The technical solution provided by the embodiment of the present application is that, by maintaining at least two sets of closed-loop power control adjustment states for SRS by the terminal device when the power control of SRS is independent of the power control of the uplink data channel, the terminal device can use different closed-loop power control adjustment states to control the power of SRS. For example, for different nodes or devices with uplink receiving functions, a suitable closed-loop power control adjustment state can be selected from at least two sets of closed-loop power control adjustment states to adjust the transmission power of SRS, thereby improving the accuracy of power control.

[0174] Please refer to Figure 7, which shows a flow chart of an SRS closed-loop power control method provided by another embodiment of the present application. The method can be executed by a network device. The method may include the following steps:

[0175] In step 710, the network device sends first control information to the terminal device when the power control of the SRS is independent of the power control of the uplink data channel, and the first control information is used to adjust the transmission power of the SRS; wherein the first control information is used to determine the transmission power of the SRS corresponding to at least one of the at least two sets of closed-loop power control adjustment states maintained by the terminal device.

[0176] In some embodiments, first capability information sent by a terminal device is received, where the first capability information is used to indicate whether the terminal device maintains at least two sets of closed-loop power control adjustment states for an SRS.

[0177] In some embodiments, when the terminal device maintains at least two sets of closed-loop power control adjustment states for SRS, the first capability information is also used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, where N is an integer greater than or equal to 1.

[0178] In some embodiments, the first control information includes: a transmit power control TPC command and first index indication information corresponding to each of the N carriers; wherein, the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0179] In some embodiments, the first control information includes: a TPC command and second index indication information corresponding to each of the N carriers; wherein, the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the TCI state corresponding to the i-th carrier, and there is a correspondence between the indicated TCI state and the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0180] In some embodiments, the uplink channel or signal further includes: an uplink control channel and / or an uplink data channel.

[0181] In some embodiments, the TCI state is an uplink TCI state or a joint TCI state.

[0182] In some embodiments, the method further includes: sending first configuration information to the terminal device, where the first configuration information is used to configure whether the power control of the SRS is independent of the power control of the uplink data channel.

[0183] In some embodiments, the method further includes: when the first configuration information is used to configure the power control of the SRS to be independent of the power control of the uplink data channel, executing the step of sending first control information to the terminal device; or, when the first configuration information is used to configure the power control of the SRS to follow the power control of the uplink data channel, sending second control information to the terminal device, the second control information is used to adjust the transmission power of the uplink data channel, and the transmission power of the SRS is the same as the transmission power of the uplink data channel.

[0184] In some embodiments, each of the at least two sets of closed-loop power control adjustment states corresponds to a device or node having an uplink receiving function.

[0185] For details not described in detail in the method embodiment on the network device side, please refer to the method embodiment on the terminal device side above.

[0186] The technical solution provided in the embodiment of the present application is that, by maintaining at least two sets of closed-loop power control adjustment states for SRS by the terminal device when the power control of SRS is independent of the power control of the uplink data channel, the terminal device can adopt different closed-loop power control adjustment states to perform power control on SRS for multiple nodes or devices with uplink receiving functions. For example, for different nodes or devices, the appropriate closed-loop power control adjustment state can be selected from at least two sets of closed-loop power control adjustment states to adjust the transmission power of SRS, which can improve the accuracy of power control.

[0187] The following is an embodiment of the device of the present application, which can be used to implement the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0188] Please refer to Figure 8, which shows a block diagram of an SRS closed-loop power control device provided by one embodiment of the present application. This device has the functionality to implement the aforementioned method example on the terminal device side. This functionality can be implemented in hardware or by hardware executing corresponding software implementations. This device can be the terminal device described above, or it can be provided within a terminal device. As shown in Figure 8, the device 800 may include a processing module 810.

[0189] The processing module 810 is configured to maintain at least two sets of closed-loop power control adjustment states for the SRS when the power control of the SRS is independent of the power control of the uplink data channel.

[0190] In some embodiments, as shown in FIG8 , the apparatus further includes a sending module 820 .

[0191] The sending module 820 is used to send first capability information, where the first capability information is used to indicate whether the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS.

[0192] In some embodiments, when the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS, the first capability information is also used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, where N is an integer greater than or equal to 1.

[0193] In some embodiments, as shown in FIG8 , the apparatus further includes a receiving module 830 .

[0194] The receiving module 830 is configured to receive first control information, where the first control information is used to adjust the transmit power of the SRS.

[0195] The processing module 810 is further configured to determine, based on the first control information, the SRS transmit power corresponding to at least one of the at least two closed-loop power control adjustment states.

[0196] In some embodiments, the first control information includes: a transmit power control TPC command and first index indication information corresponding to each of N carriers; wherein, the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0197] In some embodiments, the processing module 810 is configured to determine, for the i-th carrier, the transmit power of the SRS corresponding to the i-th carrier based on the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier.

[0198] In some embodiments, the first control information includes: a TPC command and a second index indication information corresponding to each of N carriers; wherein the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the TCI state corresponding to the i-th carrier, and there is a correspondence between the indicated TCI state and the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0199] In some embodiments, the processing module 810 is used to determine, for the i-th carrier, the closed-loop power control adjustment state corresponding to the i-th carrier based on the indicated TCI state corresponding to the i-th carrier and the correspondence between the indicated TCI state and the closed-loop power control adjustment state; determine the transmit power of the uplink channel or signal corresponding to the i-th carrier based on the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier; wherein the uplink channel or signal includes the SRS.

[0200] In some embodiments, the uplink channel or signal further includes: an uplink control channel and / or an uplink data channel.

[0201] In some embodiments, the TCI state is an uplink TCI state or a joint TCI state.

[0202] In some embodiments, the receiving module 830 is further configured to receive first configuration information, where the first configuration information is used to configure whether the power control of the SRS is independent of the power control of the uplink data channel.

[0203] In some embodiments, the processing module 810 is used to determine the transmit power of the SRS based on first control information when the first configuration information is used to configure the power control of the SRS to be independent of the power control of the uplink data channel, and the first control information is used to adjust the transmit power of the SRS; or, when the first configuration information is used to configure the power control of the SRS to follow the power control of the uplink data channel, determine the transmit power of the uplink data channel based on second control information, and the transmit power of the SRS is the same as the transmit power of the uplink data channel, and the second control information is used to adjust the transmit power of the uplink data channel.

[0204] In some embodiments, each of the at least two sets of closed-loop power control adjustment states corresponds to a device or node having an uplink receiving function.

[0205] Please refer to Figure 9, which shows a block diagram of an SRS closed-loop power control device provided by another embodiment of the present application. This device has the functions of implementing the aforementioned network device-side method examples. These functions can be implemented in hardware or by hardware executing corresponding software implementations. This device can be the network device described above, or it can be installed within a network device. As shown in Figure 9, the device 900 may include a sending module 910.

[0206] The sending module 910 is used to send first control information to the terminal device when the power control of the SRS is independent of the power control of the uplink data channel, and the first control information is used to adjust the transmission power of the SRS; wherein the first control information is used to determine the transmission power of the SRS corresponding to at least one set of at least two sets of closed-loop power control adjustment states maintained by the terminal device.

[0207] In some embodiments, as shown in FIG. 9 , the apparatus further includes a receiving module 920 .

[0208] In some embodiments, the receiving module 920 is configured to receive first capability information sent by the terminal device, where the first capability information is used to indicate whether the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS.

[0209] In some embodiments, when the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS, the first capability information is also used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, where N is an integer greater than or equal to 1.

[0210] In some embodiments, the first control information includes: a transmit power control TPC command and first index indication information corresponding to each of N carriers; wherein, the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0211] In some embodiments, the first control information includes: a TPC command and a second index indication information corresponding to each of the N carriers; wherein the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the transmission configuration indication TCI state corresponding to the i-th carrier, and the indicated TCI state has a corresponding relationship with the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

[0212] In some embodiments, the uplink channel or signal further includes: an uplink control channel and / or an uplink data channel.

[0213] In some embodiments, the TCI state is an uplink TCI state or a joint TCI state.

[0214] In some embodiments, the sending module 910 is used to send first configuration information to the terminal device, where the first configuration information is used to configure whether the power control of the SRS is independent of the power control of the uplink data channel.

[0215] In some embodiments, the sending module 910 is used to perform the step of sending the first control information to the terminal device when the first configuration information is used to configure the power control of the SRS to be independent of the power control of the uplink data channel; or, when the first configuration information is used to configure the power control of the SRS to follow the power control of the uplink data channel, send second control information to the terminal device, and the second control information is used to adjust the transmission power of the uplink data channel, and the transmission power of the SRS is the same as the transmission power of the uplink data channel.

[0216] In some embodiments, each of the at least two sets of closed-loop power control adjustment states corresponds to a device or node having an uplink receiving function.

[0217] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0218] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0219] Please refer to Figure 10, which shows a schematic diagram of the structure of a terminal device 1000 provided in one embodiment of the present application. The terminal device 1000 can be used to execute the method steps performed by the terminal device in the above embodiment. The terminal device 1000 may include: a processor 1001, a transceiver 1002, and a memory 1003. The transceiver 1002 is used to implement a sending or receiving function, such as implementing the functions of the sending module 820 and / or the receiving module 830 described above. The processor 1001 can be used to implement other processing functions or control sending and / or receiving, such as implementing the functions of the processing module 810 described above.

[0220] The processor 1001 includes one or more processing cores. The processor 1001 executes various functional applications and information processing by running software programs and modules.

[0221] The transceiver 1002 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0222] The memory 1003 may be connected to the processor 1001 and the transceiver 1002 .

[0223] The memory 1003 may be used to store a computer program executed by the processor, and the processor 1001 is used to execute the computer program to implement the various steps performed by the terminal device in the above method embodiment.

[0224] In addition, the memory 1003 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static access memory, a read-only memory, a magnetic memory, a flash memory, and a programmable read-only memory.

[0225] In some embodiments, the transceiver 1002 is configured to maintain at least two sets of closed-loop power control adjustment states for the SRS when the power control of the SRS is independent of the power control of the uplink data channel.

[0226] For details not described in detail in the above embodiments, please refer to the introduction in the above method embodiments, which will not be repeated here.

[0227] Please refer to Figure 11, which shows a schematic diagram of the structure of a network device 1100 provided in one embodiment of the present application. The network device 1100 can be used to execute the method steps performed by the network device in the above embodiments. The network device 1100 may include: a processor 1101, a transceiver 1102, and a memory 1103. The transceiver 1102 is used to implement sending or receiving functions, such as implementing the functions of the sending module 910 and / or receiving module 920 described above, and the processor 1101 can be used to implement other processing functions or control sending and / or receiving.

[0228] The processor 1101 includes one or more processing cores. The processor 1101 executes various functional applications and information processing by running software programs and modules.

[0229] The transceiver 1102 may include a receiver and a transmitter. For example, the transceiver 1102 may include a wired communication component, which may include a wired communication chip and a wired interface (such as an optical fiber interface). Alternatively, the transceiver 1102 may also include a wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0230] The memory 1103 may be connected to the processor 1101 and the transceiver 1102 .

[0231] The memory 1103 may be used to store a computer program executed by the processor, and the processor 1101 is used to execute the computer program to implement each step performed by the network device in the above method embodiment.

[0232] In addition, the memory 1103 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0233] In some embodiments, the transceiver 1102 is used to send first control information to the terminal device when the power control of the SRS is independent of the power control of the uplink data channel, and the first control information is used to adjust the transmission power of the SRS; wherein the first control information is used to determine the transmission power of the SRS corresponding to at least one of at least two sets of closed-loop power control adjustment states maintained by the terminal device.

[0234] For details not described in detail in this embodiment, please refer to the above embodiments and will not be described in detail here.

[0235] An embodiment of the present application further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is configured to be executed by a processor of a terminal device to implement the above-mentioned SRS closed-loop power control method on the terminal device side.

[0236] An embodiment of the present application further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is configured to be executed by a processor of a network device to implement the above-mentioned SRS closed-loop power control method on the network device side.

[0237] In some embodiments, the computer-readable storage medium may include: ROM (Read-Only Memory), RAM (Random-Access Memory), SSD (Solid State Drives), or an optical disk, etc. Among them, the random access memory may include ReRAM (Resistance Random Access Memory) and DRAM (Dynamic Random Access Memory).

[0238] An embodiment of the present application further provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip runs on a terminal device, it is used to implement the above-mentioned SRS closed-loop power control method on the terminal device side.

[0239] An embodiment of the present application further provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip runs on a network device, it is used to implement the above-mentioned SRS closed-loop power control method on the network device side.

[0240] An embodiment of the present application also provides a computer program product or computer program, which includes computer instructions. The computer instructions are stored in a computer-readable storage medium. The processor of the terminal device reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned SRS closed-loop power control method on the terminal device side.

[0241] An embodiment of the present application also provides a computer program product or computer program, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the network device reads and executes the computer instructions from the computer-readable storage medium to implement the above-mentioned SRS closed-loop power control method on the network device side.

[0242] It should 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. For example, "A indicates B" can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association between A and B.

[0243] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship between indication and being indicated, configuration and being configured, etc.

[0244] In some embodiments of the present application, "predefined" may be implemented by pre-storing corresponding codes, tables, or other methods that can be used to indicate relevant information in a device (e.g., including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, predefined may refer to information defined in a protocol.

[0245] In some embodiments of the present application, the "protocol" may refer to a standard protocol in the field of communications, for example, it may include an LTE protocol, a NR protocol, and related protocols used in future communication systems, and this application does not limit this.

[0246] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0247] In addition, the step numbers described in this document only illustrate a possible execution order between the steps. In some other embodiments, the above steps may not be executed in the order of the numbers, such as two steps with different numbers are executed at the same time, or two steps with different numbers are executed in the opposite order of the diagram. The embodiments of the present application are not limited to this.

[0248] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0249] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for closed-loop power control of sounding reference signal (SRS), characterized in that, the method is executed by a terminal device, and the method includes: When the power control of the SRS is independent of the power control of the uplink data channel, for the SRS, at least two sets of closed-loop power control adjustment states are maintained.

2. The method according to claim 1, characterized in that, the method further includes: Sending first capability information, where the first capability information is used to indicate whether the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS.

3. The method according to claim 2, characterized in that, When the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS, the first capability information is further used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, where N is an integer greater than or equal to 1.

4. The method according to any one of claims 1 to 3, characterized in that, the method further includes: Receiving first control information, where the first control information is used to adjust the transmission power of the SRS; According to the first control information, determining the transmission power of the SRS corresponding to at least one set of closed-loop power control adjustment states among the at least two sets of closed-loop power control adjustment states.

5. The method according to claim 4, characterized in that, the first control information includes: transmission power control (TPC) commands corresponding to each of the N carriers and first index indication information; where the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

6. The method according to claim 5, characterized in that, the determining the transmission power of the SRS corresponding to at least one set of closed-loop power control adjustment states among the at least two sets of closed-loop power control adjustment states according to the first control information includes: For the i-th carrier, determining the transmission power of the SRS corresponding to the i-th carrier according to the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier.

7. The method according to claim 4, characterized in that, the first control information includes: TPC commands corresponding to each of the N carriers and second index indication information; where the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the transmission configuration indication (TCI) state corresponding to the i-th carrier, and the indicated TCI state has a corresponding relationship with the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

8. The method according to claim 7, characterized in that, the determining the transmission power of the SRS corresponding to at least one set of closed-loop power control adjustment states among the at least two sets of closed-loop power control adjustment states according to the first control information includes: For the i-th carrier, determine the closed-loop power control adjustment state corresponding to the i-th carrier according to the indicated TCI state corresponding to the i-th carrier and the corresponding relationship between the indicated TCI state and the closed-loop power control adjustment state; Determine the transmission power of the uplink channel or signal corresponding to the i-th carrier according to the TPC command corresponding to the i-th carrier and the closed-loop power control adjustment state corresponding to the i-th carrier; wherein, the uplink channel or signal includes the SRS.

9. The method according to claim 8, wherein, The uplink channel or signal further includes: an uplink control channel and / or an uplink data channel.

10. The method according to any one of claims 7 to 9, wherein, The TCI state is an uplink TCI state or a joint TCI state.

11. The method according to any one of claims 1 to 3, wherein, The method further includes: Receiving first configuration information for configuring whether the power control of the SRS is independent of the power control of the uplink data channel.

12. The method according to claim 11, wherein, The method further includes: When the first configuration information is used to configure the power control of the SRS to be independent of the power control of the uplink data channel, determining the transmission power of the SRS based on first control information for adjusting the transmission power of the SRS; Or, When the first configuration information is used to configure the power control of the SRS to follow the power control of the uplink data channel, determining the transmission power of the uplink data channel based on second control information, and the transmission power of the SRS is the same as the transmission power of the uplink data channel, where the second control information is used to adjust the transmission power of the uplink data channel.

13. The method according to any one of claims 1 to 12, wherein, Each set of closed-loop power control adjustment states in the at least two sets of closed-loop power control adjustment states corresponds to a device or node with uplink reception function.

14. A method for closed-loop power control of sounding reference signal SRS, wherein, The method is executed by a network device, and the method includes: When the power control of the SRS is independent of the power control of the uplink data channel, sending first control information to the terminal device for adjusting the transmission power of the SRS; wherein, the first control information is used to determine the Transmission power of the SRS corresponding to at least one set of closed-loop power control adjustment states in at least two sets of closed-loop power control adjustment states maintained by the terminal device.

15. The method according to claim 14, wherein, The method further includes: Receiving first capability information sent by the terminal device for indicating whether the terminal device maintains the at least two sets of closed-loop power control adjustment states for the SRS.

16. The method according to claim 15, wherein, When the terminal device maintains at least two sets of closed-loop power control adjustment states for the SRS, the first capability information is further used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, where N is an integer greater than or equal to 1.

17. The method according to any one of claims 14 to 16, wherein, the first control information includes: transmission power control (TPC) commands and first index indication information respectively corresponding to the N carriers; wherein, the first index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the closed-loop power control adjustment state corresponding to the i-th carrier, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

18. The method according to any one of claims 14 to 16, wherein, the first control information includes: TPC commands and second index indication information respectively corresponding to the N carriers; wherein, the second index indication information corresponding to the i-th carrier among the N carriers is used to indicate the index of the transmission configuration indication (TCI) state corresponding to the i-th carrier, and there is a corresponding relationship between the indicated TCI state and the closed-loop power control adjustment state, N is an integer greater than or equal to 1, and i is a positive integer less than or equal to N.

19. The method according to claim 18, wherein, the uplink channel or signal further includes: an uplink control channel and / or an uplink data channel.

20. The method according to claim 18 or 19, wherein, the TCI state is an uplink TCI state or a joint TCI state.

21. The method according to any one of claims 14 to 16, wherein, the method further includes: sending first configuration information to the terminal device, and the first configuration information is used to configure whether the power control of the SRS is independent of the power control of the uplink data channel.

22. The method according to claim 21, wherein, the method further includes: when the first configuration information is used to configure the power control of the SRS to be independent of the power control of the uplink data channel, performing the step of sending the first control information to the terminal device; or, when the first configuration information is used to configure the power control of the SRS to follow the power control of the uplink data channel, sending second control information to the terminal device, and the second control information is used to adjust the transmission power of the uplink data channel, and the transmission power of the SRS is the same as the transmission power of the uplink data channel.

23. The method according to any one of claims 14 to 22, wherein, each set of the at least two sets of closed-loop power control adjustment states corresponds to a device or node with uplink reception function.

24. An SRS closed-loop power control device, wherein, the device includes: a processing module, configured to maintain at least two sets of closed-loop power control adjustment states for the SRS when the power control of the SRS is independent of the power control of the uplink data channel.

25. An SRS closed-loop power control device, It is characterized in that the device includes: a sending module, configured to send first control information to a terminal device when the power control of the SRS is independent of the power control of the uplink data channel, where the first control information is used to adjust the transmission power of the SRS; wherein, the first control information is used to determine the transmission power of the SRS corresponding to at least one of at least two sets of closed-loop power control adjustment states maintained by the terminal device.

26. A communication device It is characterized in that the communication device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program to implement the method according to any one of claims 1 to 13, or implement the method according to any one of claims 14 to 23.

27. A computer-readable storage medium It is characterized in that a computer program is stored in the storage medium, and the computer program is used to be executed by a processor to implement the method according to any one of claims 1 to 13, or implement the method according to any one of claims 14 to 23.

28. A chip It is characterized in that the chip includes programmable logic circuits and / or program instructions, and when the chip runs, it is used to implement the method according to any one of claims 1 to 13, or implement the method according to any one of claims 14 to 23.

29. A computer program product It is characterized in that the computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor reads and executes the computer instructions from the computer-readable storage medium to implement the method according to any one of claims 1 to 13, or implement the method according to any one of claims 14 to 23.

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