WO2025118288A1 - Srs closed-loop power control method and apparatus, device, and storage medium - Google Patents

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

The embodiments of the present application relate to the field of communication technology, and in particular to an SRS closed-loop power control method, device, equipment and storage medium.

Background Art

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 kept consistent, or are independent of each other.

In the related art, when the power control of the SRS is independent of the power control of the uplink data channel, 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 the SRS, the closed-loop power control adjustment states in the power control of the SRS are unique.

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

Summary of the invention

The embodiment of the present application provides an SRS closed-loop power control method, device, equipment and storage medium. The technical solution provided by the embodiment of the present application is as follows:

According to one aspect of an embodiment of the present application, a SRS closed-loop power control method is provided, the method being executed by a terminal device, the method comprising:

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.

According to one aspect of an embodiment of the present application, a SRS closed-loop power control method is provided, the method being executed by a network device, the method comprising:

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 set of at least two sets of closed-loop power control adjustment states maintained by the terminal device.

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

The processing module is used 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.

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

A sending module, 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 at least two sets of closed-loop power control adjustment states maintained by the terminal device.

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 implements the SRS closed-loop power control method on the network device side.

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.

According to one aspect of an embodiment of the present application, a computer program product is provided, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. 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 implements the SRS closed-loop power control method on the network device side.

The technical solution provided by the embodiments of the present application may have the following beneficial effects:

By maintaining at least two sets of closed-loop power control adjustment states for SRS 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.

BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

FIG5 is a schematic diagram of a combined use scenario of an uplink TRP (Transmitter Receiver Point) and a downlink TRP provided by an embodiment of the present application;

FIG6 is a flow chart of an SRS closed-loop power control method provided by an embodiment of the present application;

FIG7 is a flow chart of an SRS closed-loop power control method provided by another embodiment of the present application;

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

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

FIG10 is a schematic diagram of the structure of a terminal device provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of the structure of a network device provided in one embodiment of the present application.

DETAILED DESCRIPTION

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

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 in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

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-bas ed access to unlicensed spectrum, LTE-U) system, NR-based access to unlicensed spectrum, NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th Generation (5G) system, B5G (Beyound 5G) system, 6th Generation (6G) system or other communication systems.

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) communication, 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.

The communication system in the embodiments of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

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.

The embodiments of the present application can be applied to non-terrestrial communication networks (NTN) systems, and can also be applied to terrestrial communication networks (TN) systems. Among them, NTN generally uses satellite communication to provide communication services to ground users. NTN systems currently include NR-NTN and IoT-NTN systems, and may include other NTN systems in the future.

Exemplarily, Figure 1 is a schematic diagram of the architecture of a communication system provided by the present application. As shown in Figure 1, the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120. The network device 110 may provide communication coverage for a specific geographical area, and may communicate with terminal devices located in the coverage area.

FIG1 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 number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

Exemplarily, 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. Under this system architecture, the satellite 202 may be referred to as a network device. In some embodiments of the present application, a plurality of satellites 202 may be included in the communication system, 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.

Exemplarily, 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 relayed by 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 The system includes multiple base stations 303, each base station 303 can communicate with one or more satellites 302, and each satellite 302 can include other number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

In future evolving communication systems such as B5G (Beyond 5G) or 6G, Distributed MIMO (also known as Distributed Antenna System) scenarios and/or 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 UE-centric networking scenarios. It should be understood that the above scenarios are also applicable to TN and/or NTN.

The terminal device mentioned in the embodiments of the present application may refer to UE (User Equipment), access terminal, user unit, user 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 function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 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 do not limit this. For the convenience of description, the above-mentioned devices are collectively referred to as terminal devices. In the embodiments of the present application, "terminal equipment" and "UE" are often used interchangeably, but those skilled in the art can understand that the two can express the same meaning.

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. Access network equipment is a device deployed in an access network to provide wireless communication functions for terminal devices. Access network equipment 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, it is 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 an access network device.

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 may understand its meaning. The technical solution described in the embodiments of the present application may be applicable to an LTE system, a 5G NR system, or a subsequent evolution system of the 5G NR system (e.g., a B5G system, a 6G system), or other communication systems such as an NB-IoT (Narrow Band Internet of Things) system, and the present application does not limit this.

In the embodiment of the present application, the network device can provide services for the cell, and the terminal device communicates with the network device through the transmission resources (e.g., frequency domain resources, or spectrum resources) on the carrier used by the cell. The cell can be a cell corresponding to the network device (e.g., a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: a metro cell, a micro cell, a pico cell, a femto cell, etc. In the embodiment of the present application, the terminal device maintains 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.

The following is an explanation of the uplink SRS closed-loop power control.

In a communication system, it is possible to support a special type of TRP, namely the uplink TRP (Up-Link 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) NW can deploy uplink TRPs closer to UEs, thereby reducing the UE's transmit power to achieve the expected receive power. In this case, NW (NetWork) can deploy more UL TRPs to reduce the distance between UE and TRP, thereby enhancing the uplink coverage capability without increasing the complexity of UE; 2) When the UE is closer to its own uplink TRP, it can reduce the interference between multiple users in the uplink; 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 sending capability of the downlink spectrum, thereby reducing the cost of manufacturing and deployment.

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.

The following is an explanation of the Unified TCI state.

In the 3GPP (3rd Generation Partnership Project) standardization process, the concept of TCI state is proposed for downlink spatial information (QCL-Type D) indication, as well as the transmission of QCL (Quasi Co-Location) information (QCL-TypeA, QCL-TypeB and QCL-TypeC) in the time domain and/or frequency domain. Specifically, the quasi co-location (QCL) relationship can be simply described as the relationship of 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 reference signal and the target reference signal from the NW, the receiving beam that previously received the source reference signal can be used when receiving the target reference signal. If the wireless channel properties of one antenna port can be used to infer the properties of another antenna port, then the QCL relationship of the source reference signal can be used to determine the QCL relationship of the target reference signal. If the two antenna ports are quasi-co-located, the two antenna ports are quasi-co-located. That is, whether the two antenna ports are quasi-co-located depends on whether the radio channel properties of the two antenna ports are the same (similar). Common radio channel characteristics at antenna ports include Doppler spread/shift, average delay, delay spread, average gain, and spatial receiver parameters. These properties are called "large-scale properties".

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:

1) Three unified TCI state modes are designed, namely, joint TCI state is applicable to uplink and downlink channels and signals; DL TCI state (Downlink TCI state) is only applicable to downlink channels and signals; UL TCI state (Uplink TCI state) is only applicable to uplink channels and signals;

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

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

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 or without downlink scheduling information);

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 NW);

6) The uplink beam indication can be given together with the uplink power control parameters through UL TCI state or joint TCI state;

7) Support beam management function between cells.

As the name of the unified TCI state indicates, the "unified" here has many meanings. The first level of "unified" means that it unifies the uplink and downlink beam indication mechanisms, because in the 3GPP NR standard, the TCI state is only used for downlink beam indication, and the uplink beam indication uses signaling based on Spatial relation information. The second level of "unified" means that the beams between different channels are unified. For example, under the configuration of Separate DL/UL TCI state, the UE considers the downlink PDCCH (UE-only) and PDSCH (UE-only) to be unified into the same beam for transmission; in addition, the UE uses the same beam for uplink PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel) to transmit. Under the configuration of Joint TCI state, the UE believes that different channels and signals of uplink and downlink can have good beam symmetry guarantee, that is, symmetrical beam pairs are used for uplink and downlink communication.

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 2 and/or 2 pairs of TCI status.

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

When the TCI state is configured using RRC, when 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.

When utilizing a MAC CE to activate/deactivate TCI states, the structure and description of the MAC CE is as follows. As shown in 400 of FIG. 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.

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 U-TCI-UpdateList1, U-TCI-UpdateList2, U-TCI-UpdateList3 or U-TCI-UpdateList4 as specified in TS 38.331 [5], then the MAC CE applies to all serving cells in the set U-TCI-UpdateList1, U-TCI-UpdateList2, U-TCI-UpdateList3 or U-TCI-UpdateList4, respectively. ell 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;)

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;

UL BWP ID: This field indicates a UL BWP whose MAC CE applies to the code point of the DCI bandwidth part indication field specified in TS 38.212[9]. If the value of unifiedTCI-StateType in the serving unit indicated by the serving cell ID is unified, this field is considered to be reserved. The length of the BWP ID field is 2 bits; (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;)

Pi: This field indicates whether each TCI codepoint has multiple TCI states or single TCI state. If the Pi field is set to 1, it indicates that the TCI codepoint includes the DL TCI state and the UL TCI state. If the Pi field is set to 0, it indicates that the TCI codepoint only contains 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; (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;)

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.

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 to be reserved 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].I f D/U is set to 1,7-bits length TCI state ID i.e.TCI-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.)

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) that 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.

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

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

First, the calculation formula and parameters of the uplink power control of PUSCH are introduced. The power control mechanism of PUSCH includes two parts: open-loop power control and closed-loop power control. The open-loop power control parameters are configured or reconfigured by the network equipment through RRC high-level signaling, which is a slow and semi-static power control adjustment. The closed-loop power control can quickly adjust the power through the physical layer signaling DCI.

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

Wherein: b represents bandwidth part (Bandwidth Part, BWP); f represents carrier (uplink carrier within the cell or supplementary uplink carrier (Supplementary UL, SUL)); c represents serving cell; i represents transmission occasion; j represents parameter configuration index, for example, different service scenarios correspond to different parameter configuration indexes, such as the parameter configuration index of the voice call scenario is 0, and the parameter configuration index of the video call scenario is 1; _qd : the index of the reference signal used for path loss measurement; l: the index of the closed-loop power control adjustment state.

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 according to a reference signal for path loss.

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 (through the accumulator, acting on the power control accumulated value) and absolute closed-loop power control (directly acting on the power control adjustment value).

Other power control parameters in the above expression include: _PCMAX,f,c (i): the maximum transmit power of the terminal device on carrier f of serving cell c; The transmission bandwidth of PUSCH (the number of RBs allocated for resources). If the DCI includes an SRS resource indication (SRS resource indication, SRI) field, and if NR supports configuration of open-loop power parameters and closed-loop power parameters through RRC signaling with DCI, The mapping relationship between the SRI domains indicates the open-loop power parameters and closed-loop power parameters through the state in the SRI domain in the DCI. _{PL b,f,c} (qd) is the path loss, and PL _f,f,c (q _d )＝referenceSignalPower–higher layer filtered RSRP. Among them, "higher layer filtered RSRP" is the RSRP filtered by the higher layer, and RSRP is measured by the terminal device based on the downlink reference signal. Among them, the high-level 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 transmission power of the downlink reference signal sent by the network device. Higher layer filtered RSRP is the received power of the downlink reference signal sent by the network device to the terminal device. The difference between the two is the path loss.

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). Among them, _qs : index of SRS resource set; hb _,f,c (i,l): adjustment state of SRS closed-loop power control; SRS power control is based on SRS resource set, and SRS resources in an SRS resource set use the same power control parameters. The SRS resource set index of open-loop power control parameters P _{O_SRS,b,f,c} (qs) and α _SRS,b,f,c ( _qs ) and the reference signal 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. h _b,f,c (i,l) may be indicated by RRC signaling to use the same closed-loop power control adjustment state as the PUSCH associated with the closest time domain, or to use an independent closed-loop power control adjustment state.

In the related art, f _b,f,c (i,l) is the current PUSCH 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.

Alternatively, if the UE is not configured for PUSCH transmission on the activated UL BWP b of carrier f serving cell c, or if the SRS power control adjustment state indicates a separate power control adjustment state 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 the δ _SRS,b,f,c values. is the sum of the TPC command values in the set S i of TPC command values with cardinality C(S i ) received by the UE between K _SRS (ii ₀ )-1 symbols before SRS transmission opportunity i-i_0 and K _SRS ( _i ) symbols before SRS transmission opportunity i on the activated UL BWP b of carrier f of serving cell _c in SRS power control adjustment state, where i ₀ >0 is the smallest integer before K _SRS (i) symbols. 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 (ii ₀ )-1symbols before SRS transmission occasion ii ₀ and 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 i ₀ >0is the smallest integer for which K _SRS (i)symbols before SRS transmission occasion ii ₀ is earlier than K _SRS (ii ₀ )symbols before SRS transmission occasion i.)

Alternatively, 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 h _b,f,c (i)＝δ _SRS,b,f,c (i). Wherein, the UE detects DCI format 2_3 K _SRS,min symbols before the first symbol of SRS transmission opportunity i. (h _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 ofδ _SRS,b,f,c are provided in Table 7.1.1-1.)

The following introduces the power control of SRS in DCI format 2_3. DCI format 2_3 uses a special CRC for scrambling, namely TPC-SRS-RNTI, and the content of the transmission is as follows: -block number 1, block number 2, ..., block number N. The starting position of each block is configured by high-level signaling such as RRC. The information contained in each block is as follows: SRS request is 0 or 2 bits, and TPC command is 2 bits.

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 a value in the set {-4, -1, 1, 4}, as shown in Table 1.

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 δ _PUSCH,b,f,c values or δ _SRS,b,f,c values in DCI format 2_3

In the related art, as shown in FIG5 , a schematic diagram of a combined use scenario of an uplink TRP and a downlink TRP is given. As shown in FIG5 , the UE needs to send SRS to two TRPs respectively. That is, the UE needs to send SRS to the UL-only TRP (uplink-only TRP) 510 and the regular TRP 520 respectively. For any TRP, the NW configures at least one SRS resource set and corresponding RRC parameters to perform uplink power control. According to the above SRS power control formula, when the SRS and PUSCH use closed-loop power control respectively, the 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 the 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 the SRS. Correspondingly, in DCI format 2_3, the TPC command of the SRS does not have an indication of CLI (Closed-loop index).

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 transmission power of the SRS, thereby improving the accuracy of the power adjustment of the SRS.

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:

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.

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 no further elaboration is given. 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.

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

In some embodiments, the uplink data channel is a channel that supports carrying data information. The uplink data channel may be a data channel, which may be a data channel for uplink transmission, which supports carrying data information and may 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, with the evolution of communication technology, the name of the uplink data channel may change, such as no longer being called PUSCH, but being called other names, and this application does not limit this.

In some embodiments, closed-loop power control is one type of power control. In closed-loop power control, the power of the transmitter is dynamically adjusted according to the receiving effect of the receiver. Closed-loop power control is a control method in which the power of the transmitter is dynamically adjusted according to the receiving effect of the receiver. When the receiver feels that the effect is not good, it can ask the transmitter to increase the power; when the receiver feels that the effect is too good, it can ask the transmitter to reduce the power. Closed-loop power control is completed by the transmitter and the receiver. In some embodiments, there is a feedback control loop in the closed-loop power control process. The receiver compares and judges the received signal quality and the expected signal quality, and gives the transmitter a command (such as a TPC command) to increase or reduce the power. The transmitter executes this command and repeats according to this rule. In other embodiments, power control also includes open-loop power control. In open-loop power control, the transmitter subjectively determines the size of the transmission power. That is, the transmission power of the transmitter has nothing to do with the receiver. In the embodiment of the present application, the transmitter can also be implemented as a terminal device, and the receiver can also be implemented as a network device.

In some embodiments, the closed-loop power control adjustment state can be understood as a way or means of adjusting the closed-loop power control. In the 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 embodiment of the present application, when it is known that 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 in the terminal device. Exemplarily, taking the case 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, N is a positive integer not less than 2), the terminal device uses the closed-loop power control adjustment state 1 to adjust the power control of the SRS, and sends the SRS to the corresponding receiving end 1 (or the node or device 1 with the uplink receiving function) according to the adjusted power. The terminal device uses the closed-loop power control adjustment state 2 to adjust the power control of the SRS, and sends the SRS to the corresponding receiving end 2 (or the node or device 2 with the uplink receiving function) according to 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.

In other embodiments, at least two sets of closed-loop power control adjustment states are stored in the terminal device. 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.

In other embodiments, the at least two sets of closed-loop power control adjustment states may be pre-stored in the network device. Or, when the network device sends a downlink signal to the terminal device, the at least two sets of closed-loop power control adjustment states are sent to the terminal device, and the downlink signal is used to instruct the terminal device to perform power control on the SRS. In this case, the on-demand loading of the closed-loop power control adjustment state is realized, and the storage cost of the closed-loop power control adjustment state of the terminal device is reduced.

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 an 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 an 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.

In some embodiments, the terminal device sends first capability information to the network device, and the first capability information indicates whether the terminal device maintains at least two sets of closed-loop power control adjustment states for SRS. In some embodiments, the terminal device sends the first capability information through a first channel. The first channel is a channel that supports carrying data information. The first channel can be a data channel, and the data channel 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.

In some embodiments, the first capability information is an information format used to indicate whether the terminal device maintains at least two sets of closed-loop power control adjustment states for 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 SRS.

In some embodiments, when the terminal device maintains the 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. 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 in a service cell.

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 may also indicate the maximum number of closed-loop power control adjustment states supported by the terminal device while indicating that the terminal device supports at least two sets of closed-loop power control adjustment states. The terminal device informs the network device whether it supports at least two sets of closed-loop power control adjustment states by means of capability reporting. 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 may be included in the first capability information, or may be reported separately by the terminal device.

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

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.

In an embodiment of the present application, the network device sends first control information to the terminal device to instruct the terminal device to adjust the transmission power of the SRS. Exemplarily, the network device sends the first control information to the terminal device via a downlink channel, which is a channel with a downlink data transmission function. Exemplarily, the first control information is an information format used by the terminal device to adjust the transmission power of the SRS.

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

In some embodiments, the first control information includes identification information of a target closed-loop power control adjustment state, and the target closed-loop power control adjustment state is one of at least two sets of closed-loop power control adjustment states. Make adjustments.

In the embodiment of the present application, the network device sends the first control information to the terminal device, and further, the terminal device determines at least one of the at least two sets of closed-loop power control adjustment states according to the first control information. This is conducive to improving the accuracy of the closed-loop power control adjustment state used for power adjustment of the SRS. That is, it is not a random selection of a closed-loop power control adjustment state, but the selection of the closed-loop power control state is carried out according to the instruction of the network device, which is conducive to ensuring the power adjustment effect.

Of course, specifically how to determine the SRS transmission 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.

Method 1: for the ith carrier, the transmission power of the SRS corresponding to the ith carrier is determined according to the TPC command corresponding to the ith carrier and the closed-loop power control adjustment state corresponding to the ith carrier.

At this time, the first control information includes: a TPC command and a 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.

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

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, and the first control information includes TPC commands corresponding to N carriers of the M carriers and first index indication information corresponding to the N carriers.

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 first index indication information can be in the form of 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 up to 2 ^N different closed-loop power control adjustment states. For example, when N is equal to 1, the first index indication information can indicate up to 2 different closed-loop power control adjustment states. For example, when N is equal to 2, the first index indication information can indicate up to 4 different closed-loop power control adjustment states.

In some embodiments, the first index indication information is CLI (Closed-loop index). In some embodiments, when two sets of closed-loop power control adjustment states are maintained in the terminal device, the two sets of closed-loop power control adjustment states correspond to indexes l={0,1} respectively. 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.

In some embodiments, the formula for the transmission power of SRS is as follows:

Its closed-loop part h _b,f,c (i,l) includes the index l of CLI. In the related art, when it is known that the power control of SRS is independent of the power control of the uplink data channel, since there is only one closed-loop power control adjustment state, index l does not exist, as described in the above embodiment, and will not be described in detail. In the embodiment of the present application, even when the power control of SRS is independent of the power control of the uplink data channel, there are multiple sets of closed-loop power control adjustment states, so index l is required.

Specifically,

Wherein h _b,f,c (ii ₀ ,l) is the closed-loop power control cumulative amount corresponding to the closed-loop power control adjustment state index l at the timing (ii ₀ ); 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.

In some embodiments, the first control information is DCI format 2_3. The 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.

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

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.

In some embodiments, SRS request–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.

In some embodiments, TPC command number 1, TPC command number 2, ..., TPC command number N, where each TPC command is applied to a corresponding UL carrier-TPC provided by a higher layer parameter cc-IndexInOneCC-Set. (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.)

In some embodiments, closed loop indicator (first index indication information) 1, closed loop indicator 2, ..., closed loop indicator N, where each CLI (closed loop power control index) corresponds to each TPC command applied to respective UL carrier. (-Closed loop indicator 1, Closed loop indicator 2, ..., Closed loop indicator N, where each CLI corresponds to each TPC command applied to respective UL carrier.)

In some embodiments, if the UE is configured with high layer parameter srs-PowerControlAdjustmentStates to apply the same closed loop power control as PUSCH, it is 0 bit. Otherwise, each bit in the n bits indicates whether the index is 0 or 1. (-0 bit if the UE is configured with 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.)

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 a corresponding CLI indicator.

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.

In the embodiment of the present application, the network device sends the first control information to the 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 different carriers, and uses the closed-loop power control adjustment state to adjust the transmission power of the uplink channel or signal corresponding to the carrier, thereby improving the accuracy of the adjustment of the transmission power of the uplink channel or signal.

Method 2, 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 correspondence 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 SRS.

At this time, 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 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.

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

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 through 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, and the first control information includes TPC commands corresponding to N carriers of the M carriers and second index indication information corresponding to the N carriers.

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 indicated TCI state corresponding to 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 may be in a digital 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 indicated TCI state corresponding to the i-th carrier. In some embodiments, the second index indication information may be represented by N bits, where N is a positive integer, which can indicate up to 2 ^N different TCI states. For example, when N is equal to 1, the second index indication information can indicate up to 2 different TCI states. For example, when N is equal to 2, the second index indication information can indicate up to 4 different TCI states.

In some embodiments, there is a correspondence between the TCI state and the closed-loop power control adjustment state. Exemplarily, for possible TCI states, the correspondence between the 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 protocol. Among them, the possible TCI state may include all TCI states, and may also include common TCI states. The present application does not limit the specific category of the TCI state with the corresponding closed-loop power control adjustment state.

In other embodiments, there is a correspondence between the indicated TCI state and the closed-loop power control adjustment state. Exemplarily, for the indicated TCI state, the correspondence between the indicated TCI state and the closed-loop power control adjustment state is preset by the terminal device, sent by the network device, or specified by the communication protocol.

Exemplarily, the following description is made for the preset correspondence relationship 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 and the closed-loop power control adjustment state that can be indicated by the second index indication information. 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 for SRS alone, 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 SRS, the network device sends a signal indicating the TCI state to the terminal device for both SRS and the target channel. Indexing, that is, combining the task of adjusting the power of the target signal and SRS, which originally required two signalings to be implemented, into a task that can be completed by one signaling, thereby reducing signaling overhead. The target channel refers to an uplink control channel and/or an uplink data channel.

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 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 has changed, 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.

Exemplarily, an exemplary description is given for the corresponding relationship specified in the communication protocol. In some embodiments, the communication protocol specifies the corresponding relationship between the TCI state and the closed-loop power control adjustment state. For example, the communication protocol specifies the corresponding relationship between all possible TCI states and the closed-loop power control adjustment state. Alternatively, the communication protocol specifies the corresponding 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 corresponding 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 corresponding relationship is specified by the communication protocol eliminates the need for additional transmission of signaling to indicate the corresponding relationship, thereby reducing signaling transmission overhead.

In some embodiments, the first control information is DCI format 2_2. The DCI state is indicated by introducing the second index indication information in DCI format 2_2, and the corresponding closed-loop power control adjustment state is further found through the corresponding relationship.

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 it supports carrying control information, and can 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, with the evolution of communication technology, the name of the uplink control channel may change, such as no longer being called PUCCH, but being called other names, and this application does not limit this.

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. Exemplarily, power control adjustment is performed on PUSCH or PUCCH.

In some embodiments, the TCI state is an uplink TCI state or a joint TCI state. The second index indication information may be used to index the uplink TCI state or the joint TCI state, which is not limited in the present application.

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

For the power calculation formula of SRS, for the closed-loop power control part, a slight adjustment is needed, that is, the indicated CLI (closed-loop power control index) is replaced with the index of the indicated TCI state (second index indication information) k={0,1}, 0 indicates the uplink TCI state, and 1 indicates the joint TCI state. Of course, considering the compatibility of the previous item of this example, a maximum of K (K>2) uplink/joint TCI states can be considered, that is, k={0,1,…K}.

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.

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

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.

In some embodiments, UL/joint TCI state indicator (i.e., second index indication information) 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 respective UL carrier. (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 respective UL carrier.)

In some embodiments, each bit in the N-bit UL/joint TCI state indicator signal indicates that the TPC command should be associated with the first or second indicated UL/joint TCI state. be associated with either the 1st or the 2nd indicated UL/joint TCI state.)

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.

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

In some embodiments, the TPC command is 2 bits. (TPC command–2 bits.)

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

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

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}. When the UE receives DCI format 2_3, it can determine which uplink/joint TCI state the TPC is associated with, so that when using the uplink/joint TCI state to transmit PUCCH/PUSCH/SRS uplink, the corresponding TPC command is used to adjust the power. The advantage of this is that in addition to SRS, the TPC can also be used for other uplink channels, such as PUCCH/PUSCH, thereby saving additional signaling overhead.

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

In some embodiments, the first control information includes: a transmit power control TPC command and a 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 some other embodiments, the first control information also 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 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.

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.

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.

That is, for the transmission power of the uplink channels or signals corresponding to N carriers, one part is determined according to method 1, and the other part is determined according to method 2. For the receiving end of conventional TRP, that is, the node or device with uplink and downlink transmission, method 1 is used to determine the closed-loop power control adjustment state corresponding to different carriers, and further obtain the transmission power of SRS. For the receiving end of uplink TRP, that is, the node or device with uplink transmission, method 2 is used to determine the closed-loop power control adjustment state corresponding to different carriers, and further obtain the transmission power of different channels.

First, for uplink TRP, NW configures SRS resource set A to follow the closed-loop power control of PUSCH, and only when l is equal to a specific index (0 or 1), that is, l = 0 or 1 corresponds to uplink TRP, SRS uses the same closed-loop power control TPC command as PUSCH. The TPC (transmission power control) command is sent by NW to UE via DCI format 2_2. The configuration type of the SRS resource set is uplink PUSCH transmission based on "codebook" or "non-codebook".

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

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.

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 realize independent closed-loop power control adjustment status for different TRPs.

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.

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.

In some embodiments, the network device sends first configuration information to the terminal device through a downlink channel, and the first configuration information is used to configure Is the power control of SRS independent of the power control of the uplink data channel?

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.

In some embodiments, when the first configuration information is used to configure the power control of SRS to follow 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 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.

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 no further details will be given here.

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.

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 perform power control on 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.

Please refer to FIG. 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:

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 set of at least two sets of closed-loop power control adjustment states maintained by the terminal device.

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 SRS.

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.

In some embodiments, the first control information includes: a transmit power control TPC command and a 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.

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 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.

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

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

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

In some embodiments, the method further includes: when the first configuration information is used to configure the power control of 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 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 SRS is the same as the transmission power of the uplink data channel.

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.

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.

The technical solution provided in the embodiment of the present application, 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, realizes that for multiple nodes or devices with uplink receiving functions, the terminal device can use different closed-loop power control adjustment states to perform power control on SRS. For example, for different nodes or devices, 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, which can improve the accuracy of power control.

The following is an embodiment of the device of the present application, which can be used to execute 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.

Please refer to FIG8 , which shows a block diagram of an SRS closed-loop power control device provided by an embodiment of the present application. The device has the function of implementing the above-mentioned method example on the terminal device side, and the function can be implemented by hardware or by hardware executing corresponding software. It can be the terminal device described above, or it can be set in the terminal device. As shown in FIG8 , the apparatus 800 can include: a processing module 810 .

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.

In some embodiments, as shown in FIG. 8 , the apparatus further includes a sending module 820 .

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.

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.

In some embodiments, as shown in FIG. 8 , the apparatus further includes a receiving module 830 .

The receiving module 830 is used to receive first control information, where the first control information is used to adjust the transmission power of the SRS.

The processing module 810 is further configured to determine, according to the first control information, the SRS transmission power corresponding to at least one of the at least two closed-loop power control adjustment states.

In some embodiments, the first control information includes: a transmit power control TPC command and a 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.

In some embodiments, the processing module 810 is used to determine 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.

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 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.

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 according to 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 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.

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

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

In some embodiments, the receiving module 830 is further used 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.

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.

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.

Please refer to FIG. 9, which shows a block diagram of an SRS closed-loop power control device provided by another embodiment of the present application. The device has the function of implementing the method example on the network device side described above, and the function can be implemented by hardware, or by hardware executing corresponding software. The device can be the network device described above, or it can be set in the network device. As shown in FIG. 9, the device 900 may include: a sending module 910.

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.

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

In some embodiments, the receiving module 920 is used 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.

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.

In some embodiments, the first control information includes: a transmit power control TPC command and a 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.

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 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.

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

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

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.

In some embodiments, the sending module 910 is used to perform the step of sending 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.

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.

One point that needs to be explained is 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.

Regarding the device 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.

Please refer to Figure 10, which shows a schematic diagram of the structure of a terminal device 1000 provided in an 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. Among them, the transceiver 1002 is used to implement a sending or receiving function, such as for implementing the functions of the above-mentioned sending module 820 and/or receiving module 830. The processor 1001 can be used to implement other processing functions or control sending and/or receiving, such as implementing the functions of the above-mentioned processing module 810.

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.

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

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

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 each step performed by the terminal device in the above method embodiment.

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 an 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.

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.

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.

Please refer to Figure 11, which shows a schematic diagram of the structure of a network device 1100 provided in an 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 embodiment. The network device 1100 may include: a processor 1101, a transceiver 1102 and a memory 1103. Among them, the transceiver 1102 is used to implement the function of sending or receiving, such as implementing the functions of the above-mentioned sending module 910 and/or receiving module 920, and the processor 1101 can be used to implement other processing functions or control sending and/or receiving.

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.

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). Optionally, the transceiver 1102 may also include a wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

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

The memory 1103 can be used to store a computer program executed by the processor, and the processor 1101 is used to execute the computer program to achieve the above Each step is performed by the network device in the method embodiment.

In addition, memory 1103 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory, erasable programmable read-only memory, static access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

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 transmit power of the SRS; wherein the first control information is used to determine the transmit 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.

For details not described in detail in this embodiment, please refer to the above embodiments, which will not be described in detail here.

An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is used 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.

An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is used 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.

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

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 SRS closed-loop power control method on the terminal device side.

The 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 SRS closed-loop power control method on the network device side.

An embodiment of the present application also provides a computer program product or a computer program, which includes computer instructions, and 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 SRS closed-loop power control method on the terminal device side.

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

It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which 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 relationship between A and B.

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

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

In some embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, which is not limited in the present application.

The term "multiple" as used herein refers to two or more than two. "And/or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the related objects are in an "or" relationship.

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 to that shown in the figure. The embodiments of the present application are not limited to this.

Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with 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 the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

The above description is only 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 protection scope of the present application.

Claims (29)

A closed-loop power control method for a sounding reference signal (SRS), characterized in that the method is performed by a terminal device, and the method comprises: 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. The method according to claim 1, characterized in that the method further comprises: 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. The method according to claim 2 is 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 also used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, and N is an integer greater than or equal to 1. The method according to any one of claims 1 to 3, characterized in that the method further comprises: receiving first control information, where the first control information is used to adjust the transmit power of the SRS; Determine, according to the first control information, the transmission power of the SRS corresponding to at least one of the at least two closed-loop power control adjustment states. The method according to claim 4 is characterized in that the first control information includes: a transmit power control TPC command and a 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. The method according to claim 5, characterized in that the step of determining, according to the first control information, the SRS transmit power corresponding to at least one of the at least two closed-loop power control adjustment states comprises: 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. The method according to claim 4 is characterized in that 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 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. The method according to claim 7, characterized in that the step of determining, according to the first control information, the SRS transmit power corresponding to at least one of the at least two closed-loop power control adjustment states comprises: For the i-th carrier, determining 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 correspondence between the indicated TCI state and the closed-loop power control adjustment state; 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, the transmission power of the uplink channel or signal corresponding to the i-th carrier is determined; wherein the uplink channel or signal includes the SRS. The method according to claim 8 is characterized in that the uplink channel or signal also includes: an uplink control channel and/or an uplink data channel. The method according to any one of claims 7 to 9 is characterized in that the TCI state is an uplink TCI state or a joint TCI state. The method according to any one of claims 1 to 3, characterized in that the method further comprises: First configuration information is received, where the first configuration information is used to configure whether power control of the SRS is independent of power control of the uplink data channel. The method according to claim 11, characterized in that the method further comprises: In a case where the first configuration information is used to configure power control of the SRS to be independent of power control of the uplink data channel, determining the transmit power of the SRS based on the first control information, the first control information being used to adjust the transmit power of the SRS; or, In a case where 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. The method according to any one of claims 1 to 12 is characterized in that each of the at least two sets of closed-loop power control adjustment states corresponds to a device or node with an uplink receiving function. A closed-loop power control method for a sounding reference signal (SRS), characterized in that the method is performed by a network device, and the method comprises: In the case where the power control of the SRS is independent of the power control of the uplink data channel, first control information is sent to the terminal device, 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 power control of the SRS maintained by the terminal device. The transmission power of the SRS corresponding to at least one set of the at least two sets of closed-loop power control adjustment states. The method according to claim 14, characterized in that the method further comprises: 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. The method according to claim 15 is 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 also used to indicate the maximum number of closed-loop power control adjustment states corresponding to each of the N carriers, and N is an integer greater than or equal to 1. The method according to any one of claims 14 to 16 is characterized in that the first control information includes: a transmit power control TPC command and a 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. The method according to any one of claims 14 to 16 is characterized in that 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 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. The method according to claim 18 is characterized in that the uplink channel or signal also includes: an uplink control channel and/or an uplink data channel. The method according to claim 18 or 19 is characterized in that the TCI state is an uplink TCI state or a joint TCI state. The method according to any one of claims 14 to 16, characterized in that the method further comprises: 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. The method according to claim 21, characterized in that the method further comprises: In a case where 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, second control information is sent to the terminal device, and the second control information is used to adjust the transmission power of the uplink data channel. The transmission power of the SRS is the same as the transmission power of the uplink data channel. The method according to any one of claims 14 to 22 is characterized in that each of the at least two sets of closed-loop power control adjustment states corresponds to a device or node with an uplink receiving function. An SRS closed-loop power control device, characterized in that the device comprises: The processing module is used 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. An SRS closed-loop power control device, characterized in that the device comprises: A sending module, 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 at least two sets of closed-loop power control adjustment states maintained by the terminal device. A communication device, characterized in that the communication device comprises a processor and a memory, the memory stores a computer program, and the processor executes the computer program to implement the method according to any one of claims 1 to 13, or implements the method according to any one of claims 14 to 23. A computer-readable storage medium, 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 to implement the method according to any one of claims 14 to 23. A chip, characterized in that the chip includes a programmable logic circuit and/or program instructions, and when the chip is running, it is used to implement the method as claimed in any one of claims 1 to 13, or to implement the method as claimed in any one of claims 14 to 23. A computer program product, 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 as claimed in any one of claims 1 to 13, or implements the method as claimed in any one of claims 14 to 23.