WO2021023250A1

WO2021023250A1 - Power control method, communication nodes and storage medium

Info

Publication number: WO2021023250A1
Application number: PCT/CN2020/107289
Authority: WO
Inventors: 姚珂; 蒋创新; 高波; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-08-07
Filing date: 2020-08-06
Publication date: 2021-02-11
Also published as: CN111093257A

Abstract

The present application provides a power control method, communication nodes and a storage medium. The power control method comprises: receiving power control parameter Media Access Control (MAC) signaling, the power control parameter MAC signaling comprising reference signal instructions and power control parameter information corresponding to the reference signal instructions; and determining power control parameters of an uplink transmission associated with the reference signal instructions according to the power control parameter information.

Description

Power control method, communication node and storage medium

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office with application number 201910729406.6 on August 7, 2019. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to a wireless communication network, for example, to a power control method, communication node, and storage medium.

Background technique

The new radio technology (NR) of a new generation of wireless communication needs to support a variety of application scenarios, and it also needs to support traditional frequency bands, high frequency bands, and beam modes at the same time. The beam characteristics can solve the problem of small coverage in the high frequency band, but the support for the beam also brings great challenges to the design of power control. In the NR system, in some cases, the reference beam for uplink transmission has been changed, but the power control parameters corresponding to the uplink transmission cannot be updated in time, making the power control insufficiently accurate.

Summary of the invention

This application provides a power control method, device, system, and storage medium.

An embodiment of the present application provides a power control method, including:

Receiving a power control parameter media access control MAC signaling, where the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication;

Determine, according to the power control parameter information, the power control parameter of the associated uplink transmission that the reference signal indicates.

Receive power control parameter media access control MAC signaling;

Update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.

Receive power control parameter media access control MAC signaling;

The power control parameter of the PUSCH authorized to be configured is determined according to the power control parameter information in the power control parameter MAC signaling.

Send power control parameter media access control MAC signaling; the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication; the power control parameter MAC signaling is used to indicate the first The communication node determines according to the power control parameter information that the reference signal indicates the power control parameter of the associated uplink transmission.

Sending power control parameter media access control MAC signaling; the power control parameter MAC signaling is used to instruct the first communication node to update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.

An embodiment of the present application provides a communication node, including:

The first receiving module is configured to receive power control parameter media access control MAC signaling, where the power control parameter MAC signaling includes a reference signal indicator and power control parameter information corresponding to the reference signal indicator;

The determining module is configured to determine, according to the power control parameter information, the power control parameter of the associated uplink transmission indicated by the reference signal.

The first receiving module is configured to receive power control parameter media access control MAC signaling;

The update module is used to update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.

The first sending module is configured to send power control parameter media access control MAC signaling; the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication; the power control parameter MAC The signaling is used to instruct the first communication node to determine, according to the power control parameter information, the reference signal indicates the power control parameter of the associated uplink transmission.

The first sending module is used to send power control parameter media access control MAC signaling; the power control parameter MAC signaling is used to instruct the first communication node to update the power control parameter information in advance according to the power control parameter MAC signaling Configured power control parameter pool.

An embodiment of the present application provides a communication node including a processor, and the processor is configured to execute any method in the embodiments of the present application when running a program.

The embodiment of the present application provides a storage medium that stores a computer program, and when the computer program is executed by a processor, any one of the methods in the embodiments of the present application is implemented.

Description of the drawings

Figure 1 is a schematic diagram of a base station and UE performing beam training;

Figure 2 is a schematic diagram of the spatial relationship indication;

Figure 3 is a schematic diagram of determining the spatial relationship;

Figure 4 is a schematic diagram of beam pair changes;

FIG. 5 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 6 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 11 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 12 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 13 is a schematic diagram of a power control method provided by an embodiment of the present invention;

FIG. 14 is a schematic diagram of the spatial relationship of PUCCH to activate/deactivate MAC;

Figure 15 is a schematic diagram of SP SRS activation/deactivation of MAC CE;

FIG. 16 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

Figure 17 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

Figure 19 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

FIG. 21 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

Figure 22 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

FIG. 23 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

FIG. 24 is a schematic structural diagram of a communication node provided by an embodiment of the present invention;

25 is a schematic structural diagram of a first communication node provided by an embodiment of the present invention;

FIG. 26 is a schematic structural diagram of a second communication node according to an embodiment of the present invention.

detailed description

Hereinafter, the embodiments of the present application will be described in detail with reference to the drawings. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

In the NR system, the base station configures a sounding reference signal (Sounding Reference Signal, SRS) resource set (SRS resource set) for a user terminal (User Equipment, UE), and the SRS resource set includes at least one SRS resource (SRS resource). SRS resource sets have different uses, such as beam management, antenna selection, positioning, codebook or non-codebook. Among them, the SRS resource sets whose uses are codebook and non-codebook are used for codebook-based physical uplink shared channel (PUSCH) transmission and non-codebook-based PUSCH respectively. transmission. The SRS resource sent by the base station to the UE may be configured with a spatial relationship. The spatial relationship may be a beam on the base station side or a beam on the UE side, which are described by a downlink reference signal resource indicator and an uplink reference signal resource indicator, respectively. The downlink reference signal is a reference signal sent by the base station side; the uplink reference signal is a reference signal sent by the UE side. When the SRS resource is configured with a spatial relationship, the UE needs to transmit the SRS resource according to the spatial relationship of the SRS resource, that is, the transmission filter parameter is determined according to the spatial relationship of the SRS resource. Wherein, the transmission filter parameter may be a transmission parameter set to form a specific beam direction. When the SRS resources sent by the base station to the UE do not have a configuration spatial relationship, the UE can determine the sending filter parameters by itself.

In the embodiment of the present application, the beam may be indicated by a reference signal. The beam can be a kind of resource (for example, transmit-end spatial filter, receive-end spatial filter, transmit-end precoding, receive-end precoding, antenna port, antenna weight vector and antenna weight matrix, etc.), and beam can also use resource index information To represent (for example, reference signal resource number, spatial relationship number). Because the beam can be bound to some time-frequency code resources for transmission, the beam can also be expressed in a transmission (sending/receiving) manner, such as space division multiplexing, frequency domain or time domain diversity. Exemplarily, the use of the reference signal indication may indicate the beam to be used. The reference signal indication may be, for example, an SRS Resource Indication (SRS Resource Indication, SRI). The reference signal may include one or more of the following:

(1) Channel State Information Reference Signal (Channel State Information Reference Signal, CSI-RS)

(2) Channel State Information Interference Measurement Signal (Channel State Information Interference Measurement Signal, CSI-IM)

(3) Demodulation Reference Signal (Demodulation Reference Signal, DMRS)

(4) Downlink demodulation reference signal (DL DMRS)

(5) Uplink demodulation reference signal (UL DMRS)

(6) Sounding Reference Signal (Sounding Reference Signal, SRS)

(7) Phase-tracking reference signals (PTRS)

(8) Random Access Channel (RACH)

(9) Synchronization signal (Synchronization Signal, SS)

(10) Synchronization Signal Block (Synchronization Signal Block, SSB or SS block)

(11) Primary synchronization signal (Primary Synchronization Signal, PSS)

(12) Secondary synchronization signal (Secondary Synchronization Signal, SSS)

In the embodiment of the present application, the UE may include any type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.

As shown in Figure 1, both the base station and the UE support the use of multiple beams for transmission or reception, so uplink and downlink beam training (also called beam scanning or beam management) is required. The base station first configures the SRS resource set used for beam management for the UE, in which the SRS resource may not be configured with a spatial relationship, and the UE determines the transmission filter parameter for the SRS resource. Then, the base station selects some better beam pairs as available/candidate beam pairs according to the results of beam training, and configures the SRS resource set for the codebook or non-codebook to the UE. The SRS resource set includes at least one SRS resource, and the spatial relationship of the SRS resources in the SRS resource set for codebook or non-codebook can be the SRS resource indicator (SRI) that the UE has sent or the downlink reference that the base station has sent Signal indication or synchronization signal block (SSB). As shown in Figure 2, the SRS resource set includes two SRS resources, which can be marked as SRI1 and SRI2 respectively.

In the NR multi-beam system, for downlink transmission, the base station instructs the sending beam, and the UE knows that the downlink sending beam of the base station corresponds to the best receiving beam of the UE according to its own measurement results. Which beam is specifically selected for reception depends on the UE. For uplink transmission, the base station instructs the UE's sending beam, and the base station itself determines the receiving beam for uplink transmission. Therefore, the receiving beam is transparent to the transmitting end. For uplink transmission, in addition to sending beams, the base station also configures power control parameters for the UE so that the UE can determine the power of uplink transmission.

For PUSCH transmission, the base station indicates one or more SRS resources through the SRI field in Downlink Control Information (DCI), and the UE uses the same transmission filter parameters/beams as the SRS resources corresponding to the SRI to transmit the PUSCH. The SRI indicated in the DCI is determined according to the SRS resource set configured by the base station. As shown in FIG. 3, the SRI field in the DCI for scheduling the PUSCH indicates SRI1, and the UE uses the spatial relationship of the SRS resources corresponding to the SRI1 to determine the transmission filter parameters of the PUSCH.

As shown in Figure 4, when the location of the UE changes, the available beam pair between the base station and the UE may change. The SRS resource set, the spatial relationship corresponding to the SRS resource, and the corresponding relationship between the SRI field and the power control parameter in the DCI are all configured by high-level signaling, such as radio resource control (Radio Resource Control, RRC) signaling. Generally, the configuration delay of high-level parameters is relatively large, and the flexibility is not high. Therefore, the NR system supports the use of Medium Access Control (MAC) signaling for semi-persistent (SP) SRS resource collections to modify the spatial relationship of SRS resources. However, the power control parameters are configured by RRC signaling to correspond to the SRS resource indication (SRI), and the power control parameters are determined based on the transmission and reception beam pair when the RRC configures the PUSCH. The corresponding relationship between the SRS resource indication and the power control parameter in the SRS resource set does not change with the modification of the spatial relationship, resulting in the inability to match the new beam pair. In Fig. 4, the beam of SRI1 has changed relative to Fig. 3, and the receiving beam of the base station may also be changed, and the power control parameters configured by RRC signaling may not match the new beam pair.

In addition, even if the SRS resource corresponding to the SRI does not change, the base station may change the uplink receiving beam according to the real-time measurement result, which may also cause the power control parameter configured by the RRC signaling to no longer match the new beam pair.

For physical uplink control channel (PUCCH) transmission, the beam is expressed by the spatial relationship corresponding to the PUCCH resource. The power control parameters are configured based on the spatial relationship. When the available beam pair changes, there is also a problem similar to PUSCH, that is, the power control parameters cannot match the new transceiver beam pair.

In an exemplary embodiment, please refer to the flowchart of the power control method provided by the embodiment of the present invention shown in FIG. 5, and the method includes:

Step 510: Receive a power control parameter media access control MAC signaling, where the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication.

Step 520: Determine, according to the power control parameter information, the reference signal indicates the power control parameter of the associated uplink transmission.

The foregoing power control method provided by the embodiment of the present invention may be executed by the first communication node. Exemplarily, the first communication node may include a UE. In step 510, the power control parameter MAC signaling may come from the second communication node. Exemplarily, the second communication node may include a base station.

In the technical solution of the embodiment of the present invention, the reference signal indication and the power control parameter information corresponding to the reference signal indication are configured through MAC signaling, and the power control parameter for uplink transmission is determined according to the power control parameter information. On the one hand, the MAC signaling configuration delay is small and the flexibility is high; on the other hand, the reference signal indication and the corresponding power control parameter information can be configured by MAC signaling in synchronization. Therefore, when the second communication node needs to change the uplink receiving beam, regardless of whether the corresponding beam of the first communication node changes, the power control parameter can be flexibly indicated, thereby achieving precise control of the uplink transmission power.

In the embodiment of the present invention, uplink transmission may include at least one of physical uplink control channel PUCCH transmission, physical uplink shared channel PUSCH transmission, sounding reference signal SRS transmission, and physical random access channel (PRACH) transmission. The power control parameter information may include at least one of PUCCH power control parameter information, PUSCH power control parameter information, and SRS power control parameter information.

In specific implementation, the reference signal indication may include one or more of SRS resource indication (SRS Resource Indication, SRI), SRS resource set indication, transmission configuration indication (Transmission Configuration Indication, TCI), and spatial relationship indication.

The SRS resource indicator, SRS resource set indicator, transmission configuration indicator, and spatial relationship indicator can also be replaced by SRS resource number, SRS resource set number, transmission configuration number, and spatial relationship number. Number and index have the same meaning and can be replaced with each other.

Taking transmission configuration indication as an example, high-level parameters, such as RRC signaling, configure at least one transmission configuration indication TCI for the first communication node, which is used as a reference for at least one type of uplink transmission. The uplink transmission may include, for example, one of physical uplink control channel PUCCH transmission, physical uplink shared channel PUSCH transmission, sounding reference signal SRS transmission, and physical random access channel PRACH transmission. The upper layer parameters also configure the association relationship between TCI and power control parameters, so that these power control parameters can be used for PUCCH transmission, PUSCH transmission, PRACH transmission and/or SRS transmission power calculation. In the embodiment of the present invention, the power control parameter MAC signaling updates the association relationship between the TCI and the power control parameter, and the power control parameter MAC signaling may include TCI.

The power control parameter MAC signaling can have multiple exemplary implementations:

Example 1: The power control parameter MAC signaling may include the spatial relationship activation state MAC control element (CE) of the physical uplink control channel PUCCH. The spatial relationship activation state MAC CE of the PUCCH may be the spatial relationship activation/deactivation MAC CE of the PUCCH, which is used to activate or deactivate the spatial relationship of PUCCH transmission, and instruct the first communication node to update the spatial relationship corresponding to the uplink transmission resource. The PUCCH spatial relationship activation/deactivation MAC CE carries the spatial relationship indication. In the embodiment of the present invention, the PUCCH spatial relationship activation/deactivation MAC CE carries the power control parameter information to realize the configuration of the spatial relationship indication and power control parameters Relationship. The PUCCH spatial relationship activation state MAC CE may include PUCCH power control parameter information.

Example 2: The power control parameter MAC signaling may include the SRS activation state MAC CE. SRS activation state MAC CE, which can be SRS activation/deactivation MAC CE. SRS activation/deactivation MAC CE can include SRS activation/deactivation MAC CE whose time domain characteristics are configured as semi-persistent (Semi-Persistent, SP), and can also include time domain characteristics configured as aperiodic and periodic SRS activation/ Deactivate one of MAC CE. SRS activation/deactivation MAC CE is used to activate or deactivate the SRS resource set or the spatial relationship corresponding to each SRS resource in the SRS resource set. SRS activation/deactivation MAC CE carries SRS resource set indication and SRS resource indication (SRI). In the embodiment of the present invention, SRS activation/deactivation MAC CE carries power control parameter information to realize the configuration of SRI and power control parameters Relationship. The SRS active state MAC CE may include at least one of PUSCH power control parameter information and SRS power control parameter information.

Example 3: The power control parameter MAC signaling may include the dedicated power control parameter MAC CE. The dedicated power control parameter MAC signaling is mainly used to carry reference signal indication and power control parameter information, and configure the reference signal indication and power control for the first communication node Association relationship of parameter information. The reference signal indication in the dedicated power control parameter MAC signaling may be SRI, SRS resource set indication, TCI and/or spatial relationship indication. The dedicated power control parameter MAC CE may include one or more of PUCCH power control parameter information, PUSCH power control parameter information, SRS power control parameter information, and PRACH power control parameter information.

In the embodiment of the present invention, power control means power control, and power control parameters and power control parameters have equivalent meanings.

In the embodiment of the present invention, the power control parameter information may include power control parameter status information and/or power control parameter indication information.

Wherein, the indication information of the power control parameter is used to indicate the specific value of the power control parameter, which may directly indicate the power control parameter, or may indicate the power control parameter through index information (for example, a serial number).

The power control parameter status information is used to indicate whether the power control parameter MAC signaling includes power control parameter indication information. For example, the PUCCH spatial relationship activation/deactivation MAC CE or SRS activation/deactivation MAC CE is used to instruct the first communication node to switch the spatial relationship. The MAC CE may not include the indication information of the power control parameters, and the power control can be used The parameter status information indicates whether the MAC CE includes indication information of power control parameters. If yes, the first communication node obtains the indication information of the power control parameter in the parameter field pre-specified in the MAC CE; if not, the MAC CE mainly carries the reference signal indication, which is used to instruct the first communication node to switch the spatial relationship.

In the embodiment of the present invention, the indication information of the power control parameter may include at least one of the following:

(1) The power control parameter set number is used to determine at least one power control parameter set in a pre-configured power control parameter set pool.

(2) Power control parameters.

(3) The power control parameter number is used to determine at least one power control parameter in a pre-configured power control parameter pool.

The power control parameter MAC CE can indicate the power control parameter through the number. Exemplarily, the parameter pool can be pre-configured, and the parameter is indicated by indicating the number in the parameter pool.

The power control parameters can include one or more of the following:

(1) Open-loop power control parameters; open-loop power control parameters may include path loss adjustment coefficient Alpha and/or target power P0.

(2) Path loss measurement parameters; path loss measurement parameters may be path loss (Path Loss, PL) reference signal parameters; path loss measurement parameters may include reference signal resource index information (such as number), which is identified by the index information The reference signal measurement result obtained the path loss.

(3) Closed-loop power control parameters; closed-loop power control parameters may include closed-loop power control indexes and/or closed-loop power control numbers.

There are several exemplary implementation manners for indicating power control parameters through index information (for example, numbers):

Example 1: Power control parameter pools can be configured for different types of power control parameters, for example, one or more of the open loop power control parameter pool, the path loss measurement parameter pool, and the closed loop power control parameter pool can be configured. The power control parameter number may correspondingly include one or more of the open loop power control parameter number, the path loss measurement parameter number, and the closed loop power control number. Wherein, the open-loop power control parameter number can be used to determine at least one open-loop power control parameter in the pre-configured open-loop power parameter pool; the path loss measurement parameter number can be used to determine at least one open-loop power control parameter in the pre-configured path loss measurement parameter pool A path loss measurement parameter; the closed-loop power control number can be used to determine at least one closed-loop power control parameter in a pre-configured closed-loop power control parameter pool.

Example 2: A power control parameter set pool may be configured, and the power control parameter set pool may include one or more power control parameter sets. Each power control parameter set includes one or more types of power control parameters. For example, configure a power control parameter set pool, where each power control parameter set includes one or more of open-loop power control parameters, path loss measurement parameters, and closed-loop power control parameters.

Example 3: A power control parameter set pool may be configured, and the power control parameter set pool may include one or more power control parameter sets. Each power control parameter set includes one or more types of power control parameter numbers. For example, the power control parameter collection pool is configured, and one or more of the open loop power control parameter pool, the path loss measurement parameter pool, and the closed loop power control parameter pool are configured. Each parameter set in the power control parameter set pool includes one or more of an open loop power control parameter number, a path loss measurement parameter number, and a closed loop power control parameter number.

In the foregoing example two and example three, the power control parameter set includes a power control parameter set number and at least one power control parameter or at least one power control parameter number corresponding to the power control parameter set number. The first communication node may index the power control parameter set by the power control parameter set number, and obtain the corresponding power control parameter.

The foregoing various power control parameter pools and/or power control parameter collection pools may be configured by higher layer parameters (such as RRC signaling).

The following specific application examples show the indication information of power control parameters:

Example 1: The power control parameter pool configured by RRC includes an open loop power control parameter pool and a path loss measurement parameter pool. The open loop power control parameter pool includes at most 32 open loop power control parameters, and the path loss measurement parameter pool includes at most 8 path loss measurement parameters. The indication information of the power control parameter may include 1 byte of information, where 5 bits indicate the open loop power control parameter number, and 3 bits indicate the path loss measurement parameter number. The closed-loop power control parameters can use the default parameter values configured by RRC.

Example 2: The power control parameter pool configured by RRC includes an open-loop power control parameter pool, a path loss measurement parameter pool, and a closed-loop power control parameter pool. The open loop power control parameter pool includes at most 32 open loop power control parameters, the path loss measurement parameter pool includes at most 4 path loss measurement parameters, and the closed loop power control parameter pool includes at most 2 closed loop power control parameters. The indication information of the power control parameter may include 1 byte of information, where 5 bits indicate the open loop power control parameter number, 2 bits indicate the path loss measurement parameter number, and 1 bit indicates the closed loop power control parameter number.

Example 3: The power control parameter pool configured by RRC includes an open loop power control parameter pool, a path loss measurement parameter pool, and a closed loop power control parameter pool. The open-loop power control parameter pool includes at most 32 open-loop power control parameters, of which 8 open-loop power control parameters can be configured by the power control parameter MAC signaling. The path loss measurement parameter pool includes at most 8 path loss measurement parameters, 4 of which can be configured by the power control parameter MAC signaling. The closed-loop power control parameter pool includes up to 2 closed-loop power control parameters, all of which can be configured by the power control parameter MAC signaling. The indication information of the power control parameter may include 1 byte of information, where 3 bits indicate the open loop power control parameter number, 2 bits indicate the path loss measurement parameter number, 1 bit indicates the closed loop power control parameter number, and the remaining 2 bits are reserved.

Example 4: The indication information of power control parameters includes 1 byte of information, and some or all of the bits are used to indicate a power control parameter set number. The power control parameter set number indicates a power control parameter set in a power control parameter set pool.

The power control parameter information includes power control parameter status information and/or power control parameter indication information, and there are multiple implementation manners.

Example 1: The power control parameter information has a first bit and/or a second bit. The first bit is used to carry power control parameter status information, and the second bit is used to carry power control parameter indication information. For example, the second bit in the power control parameter MAC signaling occupies 2 bits and can represent 4 parameter values, which are used to indicate one of the 4 path loss measurement parameters in the path loss measurement parameter pool. For example, 00 indicates the No. 0 road loss measurement parameter, 01 indicates the No. 1 road loss measurement parameter, 10 indicates the No. 2 road loss measurement parameter, and 11 indicates the No. 3 road loss measurement parameter.

Example 2: Use one or more bits to represent the power control parameter status information and/or power control parameter indication information with different bit values. For example, M bits in the power control parameter MAC signaling are used to carry power control parameter information. The M bits indicate that the power control parameter is maintained at the current value with the preset holding value (that is, the power control parameter indication information is not included in the M bits). The M bits indicate that the power control parameter is changed to one or more of the other power control parameter values except the current value by using a plurality of preset non-holding values. Among them, the holding value can be zero, and other values of the M bits except zero can be used as non-holding values. For example, M=2, 00 indicates that the current path loss measurement parameter remains unchanged, and the remaining three values indicate one of the remaining three path loss measurement parameters except the current path loss measurement parameter. It can be indicated in the order of the remaining three path loss measurement parameters. Assuming that the current path loss measurement parameter is the No. 2 path loss measurement parameter, 00 indicates that the No. 2 path loss measurement parameter is still used, while 01 indicates the use of the No. 0 path loss measurement parameter, 10 indicates the use of the No. 1 path loss measurement parameter, and 11 indicates the use No. 3 road loss measurement parameters.

Referring to the flowchart of the power control method provided by the embodiment of the present invention shown in FIG. 6, the method may include:

Step 610: Receive power control parameter media access control MAC signaling. The power control parameter MAC signaling includes reference signal indication and SRS power control parameter information.

Step 620: Determine that the power control parameter information of the SRS corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set.

Step 630: Determine, according to the power control parameter information, the power control parameter of the associated uplink transmission that the reference signal indicates.

Wherein, in step 620, it is determined that the power control parameter information of the SRS corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set according to the following information:

(1) Purpose of SRS resource collection;

(2) The corresponding type information of the SRS power control parameter included in the power control parameter MAC signaling. The corresponding type information of the SRS power control parameter is used to indicate that the power control parameter information corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set .

The power control parameter information of the SRS may correspond to the SRS resource set, or may correspond to the SRS resource in the SRS resource. The corresponding type information of the SRS power control parameter may be carried in the power control parameter MAC signaling, which directly indicates whether the power control parameter information of the SRS corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set. It can also be judged based on the purpose of the SRS resource collection. For example, according to the SRS resource set number indicated in the SRS activation/deactivation MAC CE, the use of the SRS resource set can be determined, and the power control parameter information of the SRS can be determined according to the use to correspond to the SRS resource set or to the SRS in the SRS resource set Resource correspondence.

As an exemplary embodiment, as shown in the flowchart shown in FIG. 7, step 620, determining the power control parameter information of the SRS corresponding to the SRS resource set or corresponding to the SRS resource in the SRS resource set according to the use of the SRS resource set includes :

Step 710: When the purpose of the SRS resource set is beam management, antenna selection or positioning, the power control parameter information corresponds to the SRS resource set.

Step 720: When the use of the SRS resource set is a codebook or a non-codebook, the power control parameter information corresponds to each SRS resource in the SRS resource set.

As an exemplary embodiment, when the power control parameter information corresponds to the SRS resource set, the power control parameter information includes a group of power control parameter indication information; the power control parameter information corresponds to the SRS resource in the SRS resource set In the case, the power control parameter information includes at least one group of power control parameter indication information, and the at least one group of power control parameter indication information respectively corresponds to at least one SRS resource in the SRS resource set.

Referring to the flowchart of the power control method provided by the embodiment of the present invention shown in FIG. 8, the method may include:

Step 810: Receive power control parameter media access control MAC signaling, where the power control parameter MAC signaling includes reference signal indication and PUSCH power control parameter information.

Step 820: Determine the amount of PUSCH power control parameter information included in the power control parameter MAC signaling.

Step 830: Determine, according to the power control parameter information, the power control parameter indicating the associated uplink transmission by the reference signal.

The first communication node determines the quantity of power control parameter information of the PUSCH, and can obtain the corresponding quantity of power control parameter information in the designated field of the power control parameter MAC signaling. Wherein, the number of PUSCH power control parameter information included in the power control parameter MAC signaling is determined according to one of the following information:

(1) The purpose of SRS resource collection.

(2) The number of values of the SRS resource indication field in the downlink control information DCI corresponding to uplink transmission.

(3) The parameter quantity information included in the power control parameter MAC signaling.

The number of values in the SRI field may be the number of valid SRI values in the comparison table of the correspondence between SRI values and SRS resources, that is, the number of possible values of SRI.

The number of PUSCH power control parameter information is equal to the number of SRI values in the DCI. The purpose of the SRS resource set is related to the number of values of the SRS resource indicator field (SRI field) in the DCI. For example, when the purpose of the SRS resource set is a codebook, the number of values of the SRI field in the DCI is equal to the number of SRS resources in the SRS resource set. In the case that the use of the SRS resource set is not a codebook, the number of values of the SRI field in the DCI and the combined number of SRS resources in the SRS resource set and/or the maximum supported by the communication node (ie, the first communication node) The rank is determined. In the embodiment of the present invention, the number of PUSCH power control parameter information can be determined according to the usage of the SRS resource set, and the number of PUSCH power control parameter information can also be determined according to the number of values of the SRI field in the DCI. The embodiment of the present invention may also carry parameter quantity information in the power control parameter MAC signaling, and the parameter quantity information directly indicates the quantity of PUSCH power control parameter information.

As an exemplary embodiment, as shown in the flowchart shown in FIG. 9, step 820, determining the number of PUSCH power control parameter information included in the power control parameter MAC signaling according to the use of the SRS resource set includes:

Step 910: When the purpose of the SRS resource set is a codebook, determine the amount of power control parameter information of the PUSCH according to the amount of SRS resources in the SRS resource set.

Step 920: When the purpose of the SRS resource set is not a codebook, determine the amount of PUSCH power control parameter information according to the combined number of SRS resources in the SRS resource set and/or the maximum rank supported by the communication node.

Exemplarily, the number of PUSCH power control parameter information may be the number of groups of PUSCH power control parameter information, and each group of PUSCH power control parameter information corresponds to one SRS resource set, or one SRS resource in the SRS resource set, or A combination of multiple SRS resources in the SRS resource set.

Exemplarily, the number of combinations of SRS resources in the SRS resource set may be the number of combinations formed by randomly taking N SRS resources from the M SRS resources of the SRS resource set, N≦M. However, in the NR system, the combined number of SRS resources is limited by the maximum rank supported by the communication node. Step 920: Determine the PUSCH power according to the combined number of SRS resources in the SRS resource set and/or the maximum rank supported by the communication node. The quantity of control parameter information may include: calculating the quantity of combinations formed by any K SRS resources in the M SRS resources of the SRS resource set, and determining that the quantity is the quantity of power control parameter information of the PUSCH, K≤L. Among them, L is the maximum rank supported by this communication node (the first communication node).

For example, in the case where the maximum rank L=1 and the number of resources in the SRS resource set M=4, the number of PUSCH power control parameter information and the number of values of the SRI field in the DCI are 4. In the case where the maximum rank=4 and the number of resources in the SRS resource set M=4, the number of PUSCH power control parameter information and the number of values of the SRI field in the DCI are 15.

As an exemplary implementation, each reference signal indication may correspond to one path loss measurement parameter.

As an exemplary embodiment, each reference signal indication may correspond to at least one open-loop power control parameter, and at least one open-loop power control parameter may correspond to at least one uplink transmission. For example, SRS activation/deactivation MAC SRI in CE may indicate Open-loop power control parameters for PUSCH transmission and/or open-loop power control parameters for SRS transmission. The dedicated power control MAC CE can indicate one or more of the open loop power control parameters for PUSCH transmission, the open loop power control parameters for SRS transmission, the open loop power control parameters for PUCCH transmission, and the open loop power control parameters for PRACH transmission. The open loop power control parameters for PUSCH transmission, the open loop power control parameters for SRS transmission, the open loop power control parameters for PUCCH transmission, and the open loop power control parameters for PRACH transmission can be configured independently.

As an exemplary embodiment, each reference signal indication may correspond to at least one closed-loop power control parameter, and at least one closed-loop power control parameter corresponds to at least one type of uplink transmission. For example, the activation/deactivation of the SRS, the SRI in the MAC CE may indicate the closed-loop power control parameter of PUSCH transmission and/or the closed-loop power control parameter of SRS transmission. The dedicated power control MAC CE can indicate one or more of closed-loop power control parameters for PUSCH transmission, closed-loop power control parameters for SRS transmission, closed-loop power control parameters for PUCCH transmission, and closed-loop power control parameters for PRACH transmission. The closed-loop power control parameters for PUSCH transmission, the closed-loop power control parameters for SRS transmission, the closed-loop power control parameters for PUCCH transmission, and the closed-loop power control parameters for PRACH transmission can be configured independently.

As an exemplary implementation manner, the power control parameter MAC signaling further includes transmission type information, and the transmission type information is used to identify the type of uplink transmission. The transmission type information may be used to identify one or more types of uplink transmission to which the power control parameter information in the power control parameter MAC signaling is applied. The types of uplink transmission include PUSCH transmission, SRS transmission, PUCCH transmission or PRACH transmission.

As an exemplary implementation, as shown in the flowchart of the power control method in FIG. 10, the power control method provided in the embodiment of the present invention may include:

Step 1010: Send capability information to the base station, where the capability information is used to indicate whether the communication node supports MAC signaling to modify power control parameters.

Step 1020: Receive a power control parameter MAC signaling, where the power control parameter MAC signaling includes a reference signal indicator and power control parameter information corresponding to the reference signal indicator.

Step 1030: Determine, according to the power control parameter information, the reference signal indicates the power control parameter of the associated uplink transmission.

The above method may be executed by the first communication node (for example, UE). The power control parameter MAC signaling may be sent when the second communication node (for example, the base station) determines that the first communication node supports modification of the power control parameter after receiving the capability information.

The power control method provided in the embodiment of the present invention can indicate the power control parameter through the power control parameter MAC signaling when the first communication node supports the modification of the power control parameter. The first communication node sends capability information to the base station, and the base station can clarify whether the first communication node supports modification of power control parameters.

As an exemplary implementation, an embodiment of the present invention also provides a power control method. As shown in FIG. 11, the method includes:

Step 1110: Receive the power control parameter media access control MAC signaling.

Step 1120: Update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.

In the embodiment of the present invention, the power control parameter pool pre-configured in the first communication node can also be updated through the power control parameter MAC signaling, so as to realize more flexible power control.

Exemplarily, the embodiment of the present invention may update one or more of the path loss measurement parameter pool, the open loop power control parameter pool, the closed loop power control parameter pool, and the power control parameter collection pool.

Exemplarily, the power control parameter MAC signaling includes one or more sets of power control parameter information, and one or more sets of power control parameter information is used to indicate a set of power control parameters or multiple sets of numbers in the power control parameter pool. To large power control parameters.

Taking the path loss measurement parameter pool as an example, there are several application examples as follows:

Example 1: The power control parameter MAC signaling includes a set of path loss measurement parameter information, which can be used to update the first path loss measurement parameter in the path loss measurement parameter pool.

Example 2: Power control parameter MAC signaling includes multiple sets of path loss measurement parameter information, and the number of path loss measurement parameter information in the MAC signaling is the same as the number of path loss measurement parameters in the path loss measurement parameter pool, power control parameter MAC signaling All path loss measurement parameters in the path loss measurement parameter pool can be updated.

Example 3: Power control parameter MAC signaling includes multiple sets of path loss measurement parameter information, and the number of path loss measurement parameter information in the MAC signaling is less than the number of path loss measurement parameters in the path loss measurement parameter pool. The power control parameter MAC signaling is used To update some of the path loss measurement parameters in the path loss measurement parameter pool, and update the number of the path loss measurement parameters from small to large. For example, the number of path loss measurement parameters in the path loss measurement parameter pool configured by the upper layer is 4, and the number is 0 to 3, and the power control parameter MAC signaling only includes 2 path loss measurement parameters, and only the number is updated to 0 , 1 road loss measurement parameters.

Exemplarily, the power control parameter information in the power control parameter MAC signaling may be used to update one or more of the power control parameter pool of PUSCH, the power control parameter pool of PUCCH, and the power control parameter pool of SRS.

As an exemplary implementation manner, an embodiment of the present invention further provides a power control method, including:

Receive power control parameter media access control MAC signaling;

In the embodiment of the present invention, when the communication beam changes, the power control parameters of the authorized PUSCH are updated to improve the accuracy of power control.

Exemplarily, the power control parameter information includes power control parameter indication information. In this example embodiment, the indication information of the power control parameter may be used to indicate the power control parameter of the PUSCH authorized to be configured. PUSCH transmission is divided into two categories: PUSCH transmission based on dynamic authorization and configured grant based PUSCH transmission. The PUSCH transmission for configuration authorization is divided into Type 1 and Type 2. The power control parameters of the authorized PUSCH can be used for type 2 PUSCH transmission of the authorized PUSCH.

Exemplarily, the power control parameter information further includes at least one of the type indication information of the authorized PUSCH and the number of the authorized PUSCH. The indication information of the power control parameter is used to indicate the one or more groups of power control parameters of the PUSCH authorized by the configuration.

The type indication information of the PUSCH authorized by the configuration is used to indicate the type 1 configuration authorized PUSCH transmission or the type 2 configuration authorized PUSCH transmission. The number of the PUSCH authorized for configuration may be the number of the PUSCH authorized for the type 1 configuration and the PUSCH authorized for the type 2 configuration respectively, or the unified number of the PUSCH authorized for the type 1 configuration and the PUSCH authorized for the type 2 configuration.

Higher layer signaling can configure more than one authorized PUSCH transmission. The power control parameter can determine which configured authorized PUSCH the above power control parameter is applied to by configuring at least one of the type indication information of the authorized PUSCH and the number of the authorized PUSCH. For example, the upper layer configures a type 1 configuration authorized PUSCH transmission and a type 2 configuration authorized PUSCH transmission, and the type indication information of the configured authorized PUSCH can determine which configuration authorized PUSCH the above power control parameter is applied to. For another example, the higher layer configures multiple Type 2 configuration authorized PUSCH transmissions, and the number can be used to determine which configuration authorized PUSCH the above power control parameter is applied to. For another example, the higher layer has configured multiple type 1 and multiple type 2 configuration authorized PUSCH transmissions, and the type 1 configuration authorized PUSCH transmission and the type 2 configuration authorized PUSCH transmission are separately numbered, and they are authorized through configuration The PUSCH type indication information and the number of the configured authorized PUSCH can determine which configured authorized PUSCH the above-mentioned power control parameter is applied to. For another example, the upper layer has configured multiple Type 1 and multiple Type 2 configuration authorized PUSCH transmissions, and the type 1 configuration authorized PUSCH transmission and the type 2 configuration authorized PUSCH transmission are uniformly numbered, and they are authorized through configuration The PUSCH number can determine which configuration authorized PUSCH the above power control parameter is applied to.

In an exemplary embodiment, please refer to the flowchart of the power control method provided by the embodiment of the present invention shown in FIG. 12, and the method includes:

Step 1210: Send the power control parameter media access control MAC signaling; the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication; the power control parameter MAC signaling is used to instruct the first communication node according to The power control parameter information determines that the reference signal indicates the power control parameter of the associated uplink transmission.

The foregoing power control method provided by the embodiment of the present invention may be executed by the second communication node. Exemplarily, the second communication node may include a base station. In step 1210, the first communication node may include a UE. The power control method that can be executed by the second communication node provided in the embodiment of the present invention, various technical details can be set by referring to the method that can be executed by the first communication node provided in the embodiment of the present invention.

Exemplarily, the uplink transmission includes at least one of physical uplink control channel PUCCH transmission, physical uplink shared channel PUSCH transmission, sounding reference signal SRS transmission, and physical random access channel PRACH transmission.

Exemplarily, the power control parameter MAC signaling includes one of the following:

The spatial relationship of the PUCCH is the activation state MAC control unit CE, the SRS activation state MAC CE, and the dedicated power control parameter MAC CE.

Exemplarily, the spatial relationship activation state MAC CE of the PUCCH includes the power control parameter information of the PUCCH;

The SRS activation state MAC CE includes at least one of PUSCH power control parameter information and SRS power control parameter information;

The dedicated power control parameter MAC CE includes at least one of PUCCH power control parameter information, PUSCH power control parameter information, SRS power control parameter information, and PRACH power control parameter information.

Exemplarily, the power control parameter information includes at least one of the following:

The power control parameter status information is used to indicate whether the power control parameter MAC signaling includes power control parameter indication information;

Indication information of power control parameters.

Exemplarily, the indication information of the power control parameter includes at least one of the following:

The power control parameter set number is used to determine at least one power control parameter set in the pre-configured power control parameter set pool;

Power control parameters;

The power control parameter number is used to determine at least one power control parameter in a pre-configured power control parameter pool.

Exemplarily, the power control parameter set includes a power control parameter set number and at least one power control parameter or at least one power control parameter number corresponding to the power control parameter set number.

Exemplarily, the power control parameter includes at least one of the following:

Open loop power control parameters, path loss measurement parameters, and closed loop power control parameters.

The power control parameter number includes at least one of the following:

Open-loop power control parameter number, path loss measurement parameter number, and closed-loop power control number; open-loop power control parameter number is used to determine at least one open-loop power control parameter and path loss measurement parameter number in the pre-configured open-loop power parameter pool It is used to determine at least one path loss measurement parameter in a pre-configured path loss measurement parameter pool; the closed-loop power control number is used to determine at least one closed-loop power control parameter in a pre-configured closed-loop power control parameter pool.

Exemplarily, the M bits of the power control parameter MAC signaling are used to carry power control parameter information; the M bits represent the power control parameter as the current value with a preset holding value, and the M bits represent the preset value Multiple non-holding values indicate that the power control parameter is changed to one or more of other power control parameter values except the current value.

Exemplarily, according to the usage of the SRS resource set, it may be determined that the power control parameter information of the SRS corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set.

Exemplarily, the power control parameter MAC signaling further includes corresponding type information of the SRS power control parameter, and the corresponding type information of the SRS power control parameter is used to indicate that the power control parameter information corresponds to the SRS resource set or corresponds to the SRS resource set. The SRS resources in the SRS resource set correspond.

Exemplarily, when the use of the SRS resource set is beam management, antenna selection or positioning, the power control parameter information corresponds to the SRS resource set; when the use of the SRS resource set is codebook or non-codebook In this case, the power control parameter information corresponds to each SRS resource in the SRS resource set.

Exemplarily, when the power control parameter information corresponds to the SRS resource set, the power control parameter information includes a group of power control parameter indication information; when the power control parameter information corresponds to the SRS resource When the SRS resources in the set correspond to the SRS resources, the power control parameter information includes at least one set of power control parameter indication information, and the at least one set of power control parameter indication information corresponds to at least one SRS in the SRS resource set. Resource correspondence.

Exemplarily, the amount of PUSCH power control parameter information included in the power control parameter MAC signaling can be determined according to the usage of the SRS resource set.

Exemplarily, the number of SRS resource indication fields in the downlink control information DCI corresponding to uplink transmission is equal to the number of PUSCH power control parameter information included in the power control parameter MAC signaling.

Exemplarily, the power control parameter MAC signaling may also include parameter quantity information. The parameter quantity information is used to indicate the quantity of power control parameter information of the PUSCH.

Exemplarily, in the case where the use of the SRS resource set is a codebook, the number of power control parameter information for the PUSCH is determined according to the number of SRS resources in the SRS resource set; in the case where the use of the SRS resource set is not a codebook , Determining the quantity of the PUSCH power control parameter information according to the combined quantity of SRS resources in the SRS resource set and/or the maximum rank supported by the communication node.

Exemplarily, the reference signal indication includes at least one of an SRS resource indication, an SRS resource set indication, a transmission configuration indication, and a spatial relationship indication.

Exemplarily, the corresponding relationship between the reference signal indication and the power control parameter information includes one or more of the following: each reference signal indication corresponds to one path loss measurement parameter;

Each reference signal indication corresponds to at least one open-loop power control parameter, and at least one open-loop power control parameter corresponds to at least one type of uplink transmission;

Each reference signal indication corresponds to at least one closed-loop power control parameter, and at least one closed-loop power control parameter corresponds to at least one type of uplink transmission.

Exemplarily, the power control parameter MAC signaling further includes transmission type information, and the transmission type information is used to identify the type of uplink transmission.

Exemplarily, the embodiment of the present invention may include:

Receive capability information sent by the first communication node; the capability information indicates whether the first communication node supports MAC signaling to modify power control parameters.

In the case that the first communication node supports MAC signaling to modify power control parameters, the power control parameter MAC signaling is sent; the power control parameter MAC signaling includes a reference signal indicator and power control parameter information corresponding to the reference signal indicator; power control parameters The MAC signaling is used to instruct the first communication node to determine the reference signal to indicate the associated uplink transmission power control parameter according to the power control parameter information.

In an exemplary embodiment, please refer to the flowchart of the power control method provided by the embodiment of the present invention shown in FIG. 13, and the method includes:

Step 1310: Send the power control parameter media access control MAC signaling; the power control parameter MAC signaling is used to instruct the first communication node to update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.

Exemplarily, the power control parameter MAC signaling includes one or more sets of power control parameter information, and the one or more sets of power control parameter information is used to indicate a set of power control in the power control parameter pool Parameters or groups of power control parameters with numbers from small to large.

Exemplarily, the power control parameter information in the power control parameter MAC signaling is used to update one or more of the power control parameter pool of PUSCH, the power control parameter pool of PUCCH, and the power control parameter pool of SRS.

The following provides various application examples of the embodiments of the present invention:

Application example 1

Application example 1 is to reuse the spatial relationship of PUCCH to activate/deactivate MAC CE and update the power control parameters of PUCCH.

The base station configures a PUCCH spatial relationship pool for the UE through RRC signaling, which includes at least one PUCCH spatial relationship. The spatial relationship of each PUCCH corresponds to a set of power control parameters. Each group of power control parameters comes from the PUCCH power control parameter pool configured by the base station for the UE through RRC signaling. The power control parameters include at least one of the following: open-loop power control parameters, closed-loop power control parameters, and path loss measurement parameters. The power control parameter pool means that the correspondence between multiple power control parameters and power control parameter numbers can be pre-configured, and each type of power control parameter can be indexed by the power control parameter number.

In addition, the base station also configures a PUCCH resource pool for the UE through high-layer signaling RRC, which includes at least one PUCCH resource. The base station activates/deactivates the MAC CE to activate/deactivate the spatial relationship of one PUCCH to one PUCCH resource through the spatial relationship of PUCCH. The base station indicates the PUCCH resource through physical layer signaling DCI, and the UE can determine its corresponding PUCCH spatial relationship. Figure 14 is a schematic diagram of the PUCCH spatial relationship activation/deactivation MAC. The meaning of each field in the PUCCH spatial relationship activation/deactivation MAC is as follows:

Serving Cell ID: This field indicates the identity of the serving cell to which the MAC CE applies; the length of this field is 5 bits.

Uplink bandwidth part (Bandwidth Part, BWP) identifier (BWP ID): This field indicates the UL BWP identifier to which the MAC CE applies; the length of this field is 2 bits.

Physical uplink control channel resource ID (PUCCH Resource ID): This field is the PUCCH resource ID; the length of this field is 7 bits.

S _i : indicates the activation state of the spatial relationship of the PUCCH, and i is the number of the spatial relationship of the PUCCH in the spatial relationship pool. If the value of this field is 1, it means activation, and 0 means deactivation. The value of i is from 0 to 7, a total of 8 with 1 bit each, so the length of this field is 8 bits, indicating the activation state of 8 spatial relations.

R: Reserved bit, which can be set to 0 or 1.

In order to realize the flexible power control of the PUCCH, the base station activates/deactivates the MAC CE through the spatial relationship of the PUCCH and carries the power control parameters of the PUCCH, which is used to update the PUCCH power control parameters of the PUCCH resource in the PUCCH resource in the MAC CE. One of the following methods can be used:

Method 1: Add a power control parameter field in the PUCCH spatial relationship activation/deactivation MAC CE.

One of the R fields is used to indicate whether there is an extra byte (power control parameter field) for the power control parameter indication of the activated PUCCH spatial relationship.

For example, suppose that the second R field is used to indicate that a 1-byte power control parameter field is used to indicate the power control parameter of the PUCCH, and 1 byte is added to the schematic diagram of FIG. 14 to indicate the power control parameter of the PUCCH.

Method 2: Use 2 R domains to indicate power control parameters. For example, using two R fields, a total of two bits, can indicate four situations, which are used to indicate one of the four path loss measurement parameters configured by RRC.

The indication information of the power control parameter of the PUCCH includes at least one of the following: an open-loop power control parameter number, a path loss measurement parameter number, and a closed-loop power control parameter number. Among them, the open-loop power control parameter number, the path loss measurement parameter number, and the closed-loop power control parameter number are used to identify the RRC configured open-loop power control parameter pool, path loss measurement parameter pool, and closed-loop power control parameter pool. Power control parameters.

Or, the open loop power control parameter number, the path loss measurement parameter number, and the closed loop power control parameter number are used to identify the subset of the open loop power control parameter pool configured by RRC, the subset of the path loss measurement parameter pool, and the closed loop power control parameter. Various types of power control parameters in a subset of the pool.

For example, suppose that in the PUCCH power control parameters configured by RRC, the open loop power control parameter pool includes a maximum of 32 open loop power control parameters, and the path loss measurement parameter pool includes a maximum of 8 path loss measurement parameters. The indication information of the power control parameter is 1 byte, including a 5-bit open-loop power control parameter number and a 3-bit path loss measurement parameter number. The closed-loop power control parameters are not changed, and the closed-loop power control parameters configured by the RRC for the PUCCH spatial relationship are maintained.

As another example, suppose that in the PUCCH power control parameters configured by RRC, the open-loop power control parameter pool includes up to 32 open-loop power control parameters, and the path loss measurement parameter pool includes up to 4 path loss measurement parameters. The closed-loop power control parameter pool It includes up to 2 closed-loop power controls. The indication information of the power control parameter is 1 byte, including a 5-bit open-loop power control parameter number, a 2-bit path loss measurement parameter number, and a 1-bit closed-loop power control parameter number.

As another example, suppose that in the PUCCH power control parameters configured by RRC, the open-loop power control parameter pool includes a maximum of 32 open-loop power control parameters, but the subset of the open-loop power control parameter pool for MAC CE configuration includes 8 open-loop power control parameters. Power control parameters. The path loss measurement parameter pool includes up to 8 path loss measurement parameters, but the path loss measurement parameter subset for MAC CE configuration includes 4 open-loop power control parameters, and the closed-loop power control parameter pool includes up to 2 closed-loop power control parameters. The indication information of the power control parameter is 1 byte, including a 3-bit open-loop power control parameter number, a 2-bit path loss measurement parameter number, a 1-bit power control parameter number, and the remaining 2 bits of 1 byte are reserved bits.

For another example, the indication information of the power control parameter of the PUCCH is 1 byte, and some or all of the bits are used to indicate the power control parameter set number of a PUCCH. The power control parameter set number of the PUCCH indicates a power control parameter set structure of a PUCCH, which includes at least one of the following parameters: an open loop power control parameter number, a path loss measurement parameter number, and a closed loop power control parameter number. As follows:

PUCCH power control parameter set structure:

{PUCCH power control parameter set number;

The open-loop power control parameter number corresponding to the set number;

The path loss measurement parameter number corresponding to the set number;

Closed-loop power control number corresponding to the set number

}

Another realization of the PUCCH power control parameter set structure:

{PUCCH power control parameter set number;

The open-loop power control parameter number corresponding to the set number;

The path loss measurement parameter number corresponding to the set number;

}

Another realization of the power control parameter set structure of PUCCH:

{PUCCH power control parameter set number;

The path loss measurement parameter number corresponding to the set number;

}

Another realization of the power control parameter set structure of PUCCH:

{PUCCH power control parameter set number;

The open-loop power control parameter number corresponding to the set number;

}

Which PUCCH power control parameters are included in the PUCCH power control parameter set structure depends on the base station.

The base station configures at least one PUCCH power control parameter set structure for the UE through RRC signaling. The base station instructs one of them to be used to update the power control parameters of the PUCCH included in the power control parameter set structure of the PUCCH through the MAC CE, and the power control parameters of the PUCCH that are not included in the power control parameter set structure of the other PUCCHs keep the RRC configuration for the PUCCH The value of the spatial relationship is not updated by MAC CE.

The advantage of indicating the PUCCH power control parameter set number through the MAC layer is that the base station can associate the PUCCH power control parameter set with the beam on the base station side. When the base station needs to change the uplink receiving beam, regardless of the beam on the UE side (using PUCCH Whether the spatial relationship expression) changes, the base station can flexibly update the power control parameters of PUCCH through MAC CE.

Alternatively, the indication information of the power control parameter of the PUCCH includes at least one of the following: an open loop power control parameter, a path loss measurement parameter, and a closed loop power control parameter.

Among them, the open-loop power control parameters include: P0 value, or P0 adjustment value. The P0 value is a UE-specific (UE-specific) target received power value for PUCCH. The P0 adjustment value refers to the amount that needs to be adjusted relative to the previous P0 value.

The path loss measurement parameters include: the type of the reference signal used to measure the path loss, and the number of the reference signal used to measure the path loss. The type of reference signal used for measuring path loss includes at least one of the following: channel state information reference signal CSI-RS, SSB. The number of the reference signal used to measure the path loss is used to identify the type of the reference signal used to measure the path loss. The number of the reference signal used to measure the path loss may be a reference signal number or a reference signal resource number, such as a CSI-RS resource number and an SSB number.

The closed-loop power control parameters include: the closed-loop power control number of the PUCCH. When the number of closed-loop power control of PUCCH is 1, this field may not exist.

One R field in the MAC CE can be used to indicate whether the PUCCH power control parameter exists. The R field is "0" indicating that there is no PUCCH power control parameter after the PUCCH spatial relationship activation/deactivation related information; the R field is "1" indicates that there is PUCCH power control after the PUCCH spatial relationship activation/deactivation related information parameter.

Application example 2

Application example 2 is to multiplex SRS to activate/deactivate MAC CE, and update SRS resource set or power control parameters of SRS resource.

The power control parameters for SRS transmission are configured based on the SRS resource set through high-layer signaling RRC, that is, all SRS resources in an SRS resource set share the same power control parameters. That is, the power control parameters of SRS are configured by high-level signaling. High-level signaling may also configure the spatial relationship of SRS resources.

The NR system supports SP (semi-persistent, semi-persistent) SRS activation/deactivation MAC CE, which can activate/deactivate each SRS resource in the SRS resource set configured as SP in time domain characteristics, and indicate space for activated SRS resources relationship. When the MAC CE changes the spatial relationship of the SRS resources, the power control parameters cannot be updated in time.

Figure 15 shows a schematic diagram of SP SRS activation/deactivation MAC CE. The meaning of each field is as follows:

A/D: This field indicates whether the MAC CE activates or deactivates an SP SRS resource set. A value of 1 means activation, otherwise it means deactivation.

SRS Resource Set's Cell ID (SRS Resource Set's Cell ID): This field indicates the identity of a serving cell, and the above SP SRS resource set belongs to the serving cell. If the following C field is set to 0, this field is also the serving cell of all resources in the Resource ID _i (Resource ID _i ) field. The length of this field is 5 bits.

Set uplink bandwidth part identifier (SRS Resource Set's BWP ID): This field indicates a BWP identifier, and the above-mentioned SP SRS resource set belongs to this BWP. If the following C field is set to 0, this field is also the BWP of all resources in the resource identifier i field. The field length is 2 bits.

C: This field indicates whether the bytes in the Resource Serving Cell ID field and the uplink bandwidth part identification field exist. When the value is 1, the bytes of these two types of fields exist, otherwise, they do not exist.

Supplementary Uplink (SUL): This field indicates that this MAC CE is applied to a normal uplink (NUL) carrier or SUL carrier configuration. A value of 1 indicates that it is applied to SUL carrier configuration, and 0 indicates that it is applied to NUL carrier configuration.

SP SRS Resource Set ID (SP SRS Resource Set ID): This field indicates the SP SRS resource set ID to be activated/deactivated, and the length of this field is 4 bits.

Fi: This field indicates the resource type of the spatial relationship of SRS resources. Set to 1 to indicate that the resource of the spatial relationship is a non-zero power channel state information reference signal resource (Non-Zero Power Channel State Information-Reference Signal resource, NZP CSI-RS) resource number, set to 0 to indicate that the resource of the spatial relationship is SSB or SRS Resource number. This field only exists when the A/D field is set to 1.

Resource IDi (Resource IDi): This field includes a resource ID for the spatial relationship of SRS resource i. Resource ID0 refers to the first SRS resource in the SRS resource set, Resource ID1 corresponds to the second one, and so on. If Fi is 0, and the first bit of the field is 1, the rest of the field includes the number of the SSB. If Fi is 0, and the first bit of the field is 0, the rest of the field includes the number of the SRS resource. The length of this field is 7 bits. This field only exists when the A/D field is set to 1.

Resource Serving Cell Idi (Resource Serving Cell Idi): This field indicates the identity of a serving cell, which is the serving cell where the spatial relationship resource of SRS resource i is located. The length of this field is 5 bits.

Resource uplink bandwidth part identifier i (Resource BWP Idi): This field indicates a BWP identifier, which is the BWP where the spatial relationship resource of the SRS resource i is located. The length of this field is 2 bits.

R: Reserved bit, which can be set to 0 or 1.

In order to realize the flexible power control of SRS, the base station carries SRS power control parameters through SP SRS activation/deactivation MAC CE.

The power control parameters of the SRS are based on the SRS resource set, that is, the power control parameters of the SRS are added after the SP SRS activation/deactivation related information.

The power control parameter indication of the SRS includes at least one of the following: an open loop power control parameter number, a path loss measurement parameter number, and a closed loop power control number. Among them, the open-loop power control parameter number, the path loss measurement parameter number, and the closed-loop power control number are used to identify each type of power in the RRC configuration open-loop power control parameter pool, path loss measurement parameter pool, and closed-loop power control number pool. Control parameters.

Or, the open-loop power control parameter number, the path loss measurement parameter number, and the closed-loop power control number are used to identify the subset of the open-loop power control parameter pool configured by RRC, the subset of the path loss measurement parameter pool, and the closed-loop power control number pool. The various types of power control parameters in the subset.

The power control parameter of the SRS may also be a power control parameter set number indicating one SRS. The power control parameter set number of the SRS indicates a power control parameter set structure of an SRS, which includes at least one of the following parameters: an open loop power control parameter number, a path loss measurement parameter number, and a closed loop power control number. As follows:

SRS power control parameter collection structure:

{SRS power control parameter set number;

The open-loop power control parameter number corresponding to the set number;

The path loss measurement parameter number corresponding to the set number;

Closed-loop power control number corresponding to the set number

}

Similar to the power control parameter set structure of the PUCCH, the power control parameter set structure of the SRS may also include only part of the power control parameters of the SRS, which will not be repeated here. Which SRS power control parameters are included in the SRS power control parameter set structure depends on the base station.

The base station configures at least one SRS power control parameter set structure for the UE through RRC signaling. The base station instructs one of them to be used to update the power control parameters of the SRS included in the power control parameter set structure of the SRS through the MAC CE, and the power control parameters of the SRS not included in the power control parameter set structure of the remaining SRS keep the RRC configured for the SRS resource The value of the set configuration is not updated by the MAC CE.

The advantage of indicating the SRS power control parameter set number through the MAC layer is that the base station can associate the SRS power control parameter set with the beam on the base station side. When the base station needs to change the uplink receiving beam, regardless of the beam on the UE side (using SRS resources The base station can flexibly update SRS power control parameters through MAC CE.

Similar to the "PUCCH spatial relationship activation/deactivation" MAC CE, the R field can also be used to indicate whether the "SP SRS activation/deactivation" MAC CE has indication information of the power control parameters of the SRS. Or use the R field to indicate "SP SRS activation/deactivation" MAC CE including indication information of path loss measurement parameters configured by RRC.

The power control parameters of the SRS are based on the SRS resource set, that is, the indication information of the power control parameters of the SRS is added after the SP SRS activation/deactivation related information, which is used for all SRS resources in the SRS resource set indicated by the MAC CE. The power control parameters of the above SRS may also be based on the SRS resource indication. That is, after the SP SRS activation/deactivation related information, the indication information of the power control parameters of the SRS is added, and each SRS resource in the SRS resource set corresponds to a set of indication information of the power control parameters of the SRS.

Whether the power control parameter of the SRS is based on the SRS resource set or the SRS resource can be determined according to the usage of the SRS resource set.

When the purpose of the SRS resource set is beam management and antenna selection, the power control parameters of the SRS are based on the SRS resource set.

When the use of the SRS resource set is codebook or non-codebook, the power control parameters of SRS are based on SRS resources.

It is also possible to indicate in the MAC CE whether the power control parameter of the SRS is based on the SRS resource set or the SRS resource.

When the power control parameters of the SRS are based on the SRS resource set, there is only one set of power control parameters for the SRS, which is used for all SRS resources in the SRS resource set.

When the power control parameters of the SRS are based on SRS resources, the power control parameters of the SRS have a set for each SRS resource in the SRS resource set, and they are respectively applied to the power control of each SRS resource.

The two R fields in the MAC CE can be used as power control parameters indicating SRS. "00" indicates that there is no SRS power control parameter after SP SRS activation/deactivation related information; "01" indicates that there is SRS power control parameter after SP SRS activation/deactivation related information, which is indicated based on the SRS resource set; "10 "Indicates that there are SRS power control parameters after SP SRS activation/deactivation related information, which is based on the SRS resource indication, that is, each SRS resource in the SRS resource set corresponds to a set of SRS power control parameters; "11" is the reserved value .

Alternatively, one R field in the MAC CE can be used as a power control parameter indicating SRS. The R field is "0" indicating that there is no SRS power control parameter after SP SRS activation/deactivation related information; the R field is "1" indicating that there is SRS power control parameter after SP SRS activation/deactivation related information, which is based on SRS resource set indicates.

Application example 3

Application example 3 is to multiplex SRS to activate/deactivate MAC CE and update the power control parameters of PUSCH.

In the NR system, the PUSCH beam is determined by SRI, and its power control parameters are also determined by the SRI and the correlation between the SRI configured by the RRC and the number of each power control parameter in the power control parameter pool.

If the communication beam changes, the base station can change the spatial relationship of the SRS resources corresponding to the SRI through MAC layer signaling, but cannot update the power parameters of the PUSCH corresponding to the SRI.

In order to realize the flexible power control of PUSCH, this application example uses SP SRS to activate/deactivate MAC CE to carry PUSCH power control parameters.

The power control parameters of PUSCH are based on SRI association. When the use of the SRS resource set corresponding to the SRI is a codebook, there is a one-to-one correspondence between the SRI and the SRS resources in the SRS resource set. When the use of the SRS resource set corresponding to the SRI is non-codebook, each SRI and SRS The SRS resources or SRS resource combinations in the resource set have a one-to-one correspondence. That is, the flexible power control of PUSCH is realized by adding the power control parameter of PUSCH after SP SRS activation/deactivation related information.

The PUSCH power control parameter indication includes at least one of the following: an open-loop power control parameter number, a path loss measurement parameter number, and a closed-loop power control number. Among them, the open-loop power control parameter number, the path loss measurement parameter number, and the closed-loop power control number are used to identify each type of power in the RRC configuration open-loop power control parameter pool, path loss measurement parameter pool, and closed-loop power control number pool. Control parameters.

The PUSCH power control parameter may also be a power control parameter set number indicating a PUSCH. The PUSCH power control parameter set number indicates a PUSCH power control parameter set structure, which includes at least one of the following parameters: open loop power control parameter number, path loss measurement parameter number, and closed loop power control number. As follows:

PUSCH power control parameter set structure:

{PUSCH power control parameter set number;

The open-loop power control parameter number corresponding to the set number;

Set number road loss measurement parameter number;

Set number closed loop power control number

}

Similar to the power control parameter set structure of the PUCCH, the power control parameter set structure of the PUSCH may also only include part of the power control parameters of the PUSCH, which will not be repeated here. Which PUSCH power control parameters are included in the PUSCH power control parameter set structure depends on the base station.

The number of PUSCH power control parameters can be determined according to the number of SRIs in the DCI corresponding to the SRS resource set activated by the SP SRS activation/deactivation MAC CE.

For example, when the use of the SRS resource set is a codebook, the number of SRIs in the DCI corresponding to the SRS resource set is equal to the SRS resources in the SRS resource set, so the number of power control parameters for PUSCH is equal to the number of SRS resources in the SRS resource set .

For another example, when the use of the SRS resource set is not a codebook, the number of SRIs in the DCI corresponding to the SRS resource set is equal to the number of SRS resources in the SRS resource set and the combined number of SRS resources, and is limited by the maximum number supported by the UE. Input multiple output (Multi Input Multi Output, MIMO) layer number (maximum rank). When the number of SRS resources in the SRS resource set is 4 and the maximum number of MIMO layers is 1, SRI has 4 values. Therefore, the number of power control parameters for PUSCH is equal to 4. When the number of SRS resources in the SRS resource set is 4 and the maximum number of MIMO layers is 4, the SRI has 15 values. So the number of power control parameters for PUSCH is equal to 15.

The number of power control parameters of the PUSCH can also be determined according to the usage of the SRS resource set activated by the SP SRS activation/deactivation MAC CE and the number of SRS resources included in the SRS resource set.

When the use of the SRS resource set activated by the SP SRS activation/deactivation MAC CE is a codebook, the number of power control parameters of the PUSCH is equal to the number of SRS resources included in the SRS resource set.

When the use of the SRS resource set activated by the SP SRS activation/deactivation MAC CE is not a codebook, the number of power control parameters of the PUSCH is equal to the number of combinations of SRS resources included in the SRS resource set. The combination of SRS resources includes a single SRS resource. For example, when the SRS resource set includes 4 SRS resources, the number of any combination of SRS resources is 15.

In an embodiment, when the use of the SRS resource set activated by the SP SRS activation/deactivation MAC CE is non-codebook, the number of power control parameters of the PUSCH is equal to the SRS resource set considering the limitation of the maximum number of layers of the UE The number of any combination of SRS resources included in.

One R field in the MAC CE can be used to indicate whether the power control parameter of the PUSCH exists. The R field of "0" indicates that there is no PUSCH power control parameter after SP SRS activation/deactivation related information; the R field of "1" indicates that there are PUSCH power control parameters after SP SRS activation/deactivation related information.

Application example 4

Application example 4 is to multiplex SRS to activate/deactivate MAC CE, and update the power control parameters of PUSCH and/or the power control parameters of SRS.

In order to achieve flexible power control of SRS and PUSCH, the base station activates/deactivates MAC CE through SP SRS, or a new MAC CE carries SP SRS activation/deactivation related information, SRS power control parameters, and/or PUSCH power control parameters.

The two R fields in the MAC CE (please refer to Figure 15) can be used to indicate the power control parameters of the SRS and/or the power control parameters of the PUSCH. "00" means that there are no SRS power control parameters and/or PUSCH power control parameters after SP SRS activation/deactivation related information; "01" means that there are SRS power control parameters after SP SRS activation/deactivation related information, which is based on SRS resource set indication; "10" means that SP SRS activation/deactivation related information has SRS power control parameters, which are based on SRS resource indication, that is, each SRS resource in the SRS resource set corresponds to a set of SRS power control Parameter; "11" indicates that there are PUSCH power control parameters after SP SRS activation/deactivation related information.

Or, the two R fields in the MAC CE (please refer to FIG. 15) can be used to indicate the power control parameters of the SRS and/or the power control parameters of the PUSCH. "00" means that there are no SRS power control parameters and/or PUSCH power control parameters after SP SRS activation/deactivation related information; "01" means that there are SRS power control parameters after SP SRS activation/deactivation related information, which is based on As indicated by the SRS resource set; "10" indicates that there are PUSCH power control parameters after SP SRS activation/deactivation related information; "11" is a reserved value.

Application example 5

In application example 5, the base station uses the PUSCH dedicated power control parameter MAC CE to update the PUSCH power control parameter.

The dedicated power control parameter MAC CE of PUSCH includes one or more of the following fields:

SRS Resource Set’s Cell ID (SRS Resource Set’s Cell ID);

SRS Resource Set BWP ID (SRS Resource Set’s BWP ID);

SUL;

SRS Resource Set ID (SRS Resource Set ID);

PUSCH power control parameter information.

The base station configures at least one SRS resource set for the UE through high-level parameters, in which only one SRS resource set is used as a codebook, and one SRS resource set is used as a non-codebook.

The base station configures PUSCH parameters for the UE through high-level parameters, where the txConfig parameter is codebook or non-codebook. The UE determines the transmission of the PUSCH according to the txConfig parameter for selecting the codebook or non-codebook SRS resource set whose usage is the codebook or non-codebook.

The PUSCH power control parameter information field includes at least one set of PUSCH power control parameters. When the PUSCH txConfig parameter is a codebook, each set of PUSCH power control parameters corresponds to each SRS resource in the SRS resource set; when the PUSCH txConfig When the parameter is not a codebook, each set of PUSCH power control parameters corresponds to each SRS resource or combination of SRS resources in the SRS resource set.

For details of PUSCH power control parameters, see the description of Application Example 3.

Application example 6

In Application Example 6, the base station uses the SRS dedicated power control parameter MAC CE to update the SRS power control parameter.

The proprietary power control parameter MAC CE of SRS includes one or more of the following domains:

SRS Resource Set’s Cell ID (SRS Resource Set’s Cell ID);

SRS Resource Set BWP ID (SRS Resource Set’s BWP ID);

SUL;

SRS Resource Set ID (SRS Resource Set ID);

SRS power control parameter information.

The power control parameter information field of the SRS indicates the power control parameter of the SRS resource set, and is shared by all SRS resources in the SRS resource set.

Alternatively, the power control parameter field of the SRS indicates the power control parameters of all SRS resources in the SRS resource set, and each SRS resource corresponds to a set of power control parameters.

See the description of application example 2 for the power control parameters of SRS.

Application example 7

In application example 7, the base station uses the PUCCH dedicated power control parameter MAC CE to update the PUCCH power control parameter.

The dedicated power control parameter MAC CE of PUCCH includes one or more of the following fields:

Serving Cell ID;

BWP ID (BWP ID);

PUCCH power control parameter information.

For details of PUCCH power control parameter information, see the description of Application Example 1.

Application example 8

In application example 8, the base station uses the joint dedicated power control parameter MAC CE to update the power control parameters of PUSCH, SRS and/or PUCCH.

When the PUSCH, SRS, and PUCCH beams are expressed in the same way, that is, they share an uplink transmission control indicator (UL TCI-state) pool, a joint dedicated power control of joint power control can be used The parameter MAC CE realizes the common update of the power control parameters of PUSCH, SRS and PUCCH.

Exemplarily, the joint proprietary power control parameter MAC CE includes one or more of the following domains:

Serving Cell ID;

BWP ID (BWP ID);

Uplink transmission control indication state ID (UL TCI-state ID);

Path loss measurement parameters.

The path loss measurement parameters are associated with UL TCI-state ID. When the beams of PUSCH, SRS, and PUCCH are described by UL TCI-state ID, the path loss measurement parameters can be determined as the value of this domain.

The joint proprietary power control parameter MAC CE may also include one or more of the following domains:

PUCCH power control parameter information;

PUSCH power control parameter information;

SRS power control parameter information.

The power control parameter information of the PUCCH here includes the open-loop power control parameter information of the PUCCH or the closed-loop power control parameter information of the PUCCH.

The PUSCH power control parameter information here includes PUSCH open-loop power control parameter information or PUSCH closed-loop power control parameter information.

The power control parameter information of the SRS here includes the open-loop power control parameter information of the SRS or the closed-loop power control parameter information of the SRS.

The aforementioned PUSCH power control parameter information, PUCCH power control parameter information, and SRS power control parameter information may exist in whole or in part, or may not exist. Therefore, the joint proprietary power control parameter MAC CE may also include one of the following domains:

The PUCCH power control parameter status information is used to indicate whether the PUCCH power control parameter information exists;

PUSCH power control parameter status information is used to indicate whether the PUSCH power control parameter information exists;

The power control parameter status information of the SRS is used to indicate whether the power control parameter information of the SRS exists.

Since there may be a situation where one or more power control parameters for uplink transmission must exist, in this case, the power control parameter status information field of the uplink transmission is not required.

The aforementioned joint dedicated power control parameter MAC CE only configures the aforementioned power control parameters for one UL TCI-state ID. The joint dedicated power control parameter MAC CE may also configure the above power control parameters for multiple UL TCI-state IDs.

Application example 9

Application example 9 provides transmission conditions for the proprietary power control parameter MAC CE.

After updating part or all of the beam expression with the UE, the base station sends at least one of the following signaling: PUSCH dedicated power control parameter MAC CE, PUCCH dedicated power control parameter MAC CE, SRS dedicated power control parameter MAC CE , Joint proprietary power control parameter MAC CE.

The beam expression (ie, reference signal indication) includes one of the following:

The spatial relationship of SRS resources corresponding to the SRI of PUSCH;

The spatial relationship of PUCCH resources;

The spatial relationship of SRS resources in the SRS resource set;

UL TCI-state.

Application example 10

Application example 10 provides a method for using MAC CE to update a pre-configured power control parameter pool.

The power control parameter pool is configured by high-level parameters, and the following problems may exist:

Limited by the size of the power control parameter pool, the power control parameter pool may not meet the demand. Especially the road loss measurement parameters. For example, the maximum number of reference signals (Reference Signal, RS) used for path loss measurement is 4, and when the location of the UE changes, all the 4 path loss measurement parameters configured by the higher layer cannot be used.

If the higher layer does not indicate the correspondence between some power control parameters and beams, the first one in the power control parameter pool is used by default. When the location of the UE changes, this default power control parameter is inappropriate.

In order to achieve more flexible power control, the base station carries power control parameters through power control parameter MAC signaling to update the pre-configured power control parameter pool.

The power control parameter update MAC CE includes one or more of the following fields:

Serving Cell ID;

BWP ID (BWP ID);

Path loss measurement parameters.

The path loss measurement parameter field can include only one path loss measurement parameter, which is used to update the first path loss measurement parameter in the path loss measurement parameter pool configured by the upper layer, that is, the path loss measurement parameter with the smallest number or the number 0. .

Alternatively, the path loss measurement parameter domain includes at least one path loss measurement parameter, which is used to update all path loss measurement parameters in a path loss measurement parameter pool configured by a higher layer. That is, the number of path loss measurement parameters here is the same as the number of path loss measurement parameters in the path loss measurement parameter pool configured by the higher layer.

Alternatively, the path loss measurement parameter domain includes at least one path loss measurement parameter, which is used to update some path loss measurement parameters in a path loss measurement parameter pool configured by a higher layer. That is, the number of path loss measurement parameters here is less than the number of path loss measurement parameters in the path loss measurement parameter pool configured by the upper layer, and the number of path loss measurement parameters is updated from small to large. For example, if the number of path loss measurement parameters in the path loss measurement parameter pool configured by the upper layer is 4 and the numbers are 0 to 3, and the MAC CE includes only 2 path loss measurement parameters, only the numbers 0 and 1 of the upper layer configuration will be updated. The path loss measurement parameters.

The aforementioned path loss measurement parameter domain may include one or more of the following: PUSCH path loss measurement parameters, PUCCH path loss measurement parameters, and SRS path loss measurement parameters.

A MAC CE may only correspond to the update of one of the PUSCH path loss measurement parameter pool, the PUCCH path loss measurement parameter pool, or the SRS path loss measurement parameter pool, or it may correspond to multiple.

The power control parameter MAC signaling may also include at least one of the following fields:

Open loop power control parameters;

Closed loop power control parameters.

The aforementioned open-loop power control parameters and closed-loop power control parameters may be used for one or more of PUSCH, PUCCH, and SRS.

Similar to path loss measurement parameters, open-loop power control parameters and closed-loop power control parameters are also used to update part or all of the open-loop power control parameter pool and closed-loop power control parameter pool configured by the upper layer.

The power control parameter pool refers to at least one possible value of the power control parameter. The following takes the power control parameter of PUSCH as an example for description.

PUSCH parameter configuration PUSCH-Config parameters include PUSCH-PowerControl parameters.

The PUSCH-PowerControl parameter includes at least one P0-PUSCH-AlphaSet parameter, that is, an open-loop power control parameter pool.

The PUSCH-PowerControl parameter includes at least one PUSCH-PathlossReferenceRS parameter, that is, a path loss measurement parameter pool.

The PUSCH-PowerControl parameter includes at least one twoPUSCH-PC-AdjustmentStates parameter, indicating the number of closed-loop power control parameters, that is, the closed-loop power control parameter pool.

The PUSCH-PowerControl parameter includes at least one SRI-PUSCH-PowerControl parameter, that is, the power control parameter pool.

When the power control parameter information included in the power control parameter MAC signaling is 1 set of path loss measurement parameters, the pre-configured PUSCH-PathlossReferenceRS parameter numbered 0 is updated.

When the power control parameter information included in the power control parameter MAC signaling is a set of power control parameters, the pre-configured SRI-PUSCH-PowerControl parameter numbered 0 is updated.

When the power control parameter information included in the power control parameter MAC signaling is 2 sets of open loop power control parameters, the pre-configured P0-PUSCH-AlphaSet parameters numbered 0 and 1 are updated.

When the power control parameter information included in the power control parameter MAC signaling is 1 set of path loss measurement parameters, the pre-configured path loss measurement parameter pool numbered 0 for at least one of PUSCH, PUCCH, or SRS is updated.

Application example 11

Application example 11 provides a method for the UE to inform the base station of its own capabilities.

The UE notifies the base station of one or more of the following information:

Whether to support the use of MAC signaling to update power control parameters;

The maximum number of path loss measurement parameters supported.

When the UE supports the use of MAC signaling to update the power control parameters, the base station can update the power control parameters of the UE through the above-mentioned power control parameter MAC signaling, otherwise the base station cannot update the power control parameters through the power control parameter MAC signaling.

If the number of RSs for path loss measurement configured by the UE at the same time exceeds the maximum number of path loss measurement parameters it supports, the UE performs one of the following operations:

The UE only maintains the maximum number of path loss measurement parameters that can be supported with a smaller path loss measurement parameter number;

The UE only maintains the most recently updated path loss measurement parameters that can be supported.

Alternatively, the base station guarantees that the number of path loss measurement parameters not configured for the UE is greater than the maximum number of path loss measurement parameters supported by the UE.

Or, the UE does not expect that the number of path loss measurement parameters configured by the base station for itself is greater than the maximum number of path loss measurement parameters that it supports.

In the embodiment of the present invention, a base station represents a network side device, such as one or more types of base stations, transmission nodes, access points (AP, Access Point), relays, NB (Node B), and terrestrial radio access (UTRA, Universal Terrestrial Radio Access) or Evolved Terrestrial Radio Access (EUTRA, Evolved Universal Terrestrial Radio Access), etc. The UE represents a kind of terminal equipment, for example, a user, a user equipment data card, a relay, or a mobile device.

In an exemplary embodiment, please refer to the schematic diagram of the structure of the communication node provided by the embodiment of the present invention shown in FIG. 16, and the communication node includes:

The first receiving module 1610 is configured to receive power control parameter media access control MAC signaling, where the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication;

The determining module 1620 is configured to determine, according to the power control parameter information, the reference signal indicates the power control parameter of the associated uplink transmission.

Indication information of power control parameters.

Power control parameters;

Open loop power control parameters, path loss measurement parameters and closed loop power control parameters;

The power control parameter number includes at least one of the following:

Exemplarily, as shown in FIG. 17 for the schematic structural diagram of the communication node, the communication node further includes:

The corresponding module 1710 is configured to determine that the power control parameter information of the SRS corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set according to one of the following information:

The purpose of the SRS resource collection;

The power control parameter MAC signaling includes the corresponding type information of the SRS power control parameter, and the corresponding type information of the SRS power control parameter is used to indicate that the power control parameter information corresponds to the SRS resource set or corresponds to the SRS resource in the SRS resource set.

Exemplarily, as shown in the schematic structural diagram of the communication node in FIG. 18, the corresponding module 1710 includes:

The first corresponding unit 1810 is configured to correspond to the power control parameter information with the SRS resource set when the purpose of the SRS resource set is beam management, antenna selection or positioning;

The second corresponding unit 1820 is configured to correspond to each SRS resource in the SRS resource set when the use of the SRS resource set is a codebook or a non-codebook.

Exemplarily, in a case where the power control parameter information corresponds to the SRS resource set, the power control parameter information includes a group of power control parameter indication information;

In the case where the power control parameter information corresponds to the SRS resource in the SRS resource set, the power control parameter information includes at least one set of power control parameter indication information, and the at least one set of power control parameter indication information corresponds to at least one of the SRS resource sets. One SRS resource corresponds.

Exemplarily, as shown in the schematic structural diagram of the communication node as shown in FIG. 19, the communication node further includes:

The quantity confirmation module 1910 is configured to determine the quantity of PUSCH power control parameter information included in the power control parameter MAC signaling according to one of the following information:

The purpose of the SRS resource collection;

The number of values of the SRS resource indication field in the downlink control information DCI corresponding to uplink transmission;

The number of parameters included in the power control parameter MAC signaling.

Exemplarily, as shown in the schematic structural diagram of the communication node as shown in FIG. 20, the quantity confirmation module 1910 includes one of the following:

The first confirmation unit 2010 is configured to determine the amount of PUSCH power control parameter information according to the number of SRS resources in the SRS resource set when the use of the SRS resource set is a codebook;

The second confirmation unit 2020 is used to determine the PUSCH power control parameter information according to the combined number of SRS resources in the SRS resource set and/or the maximum rank supported by the communication node when the use of the SRS resource set is not a codebook Quantity.

Exemplarily, the reference signal indicator includes at least one of an SRS resource indicator (SRI), an SRS resource set indicator, a transmission configuration indicator, and a spatial relationship indicator.

Exemplarily, the corresponding relationship between the reference signal indication and the power control parameter information includes one or more of the following:

Each reference signal indicator corresponds to a path loss measurement parameter;

Exemplarily, as shown in the schematic structural diagram of the communication node as shown in FIG. 21, the communication node may further include:

The information sending unit 2110 is used to send capability information to the base station; the capability information is used to indicate whether the communication node supports modification of power control parameters.

As an exemplary embodiment, as shown in FIG. 22 for a schematic structural diagram of a communication node, an embodiment of the present invention also provides a communication node, including:

The first receiving module 2210 is configured to receive power control parameter media access control MAC signaling;

The update module 2220 is configured to update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.

As an exemplary embodiment, as shown in FIG. 23, a schematic structural diagram of a communication node, an embodiment of the present invention also provides a communication node, including:

The first sending module 2310 is used to send power control parameter media access control MAC signaling; power control parameter MAC signaling includes reference signal indication and power control parameter information corresponding to the reference signal indication; power control parameter MAC signaling is used to indicate The first communication node determines, according to the power control parameter information, the reference signal indicates the power control parameter of the associated uplink transmission.

Indication information of power control parameters.

Power control parameters;

The power control parameter number includes at least one of the following:

Exemplarily, the reference signal indication includes one of an SRS resource indication, a transmission configuration indication, and a spatial relationship indication.

As an exemplary embodiment, as shown in FIG. 24 for a schematic structural diagram of a communication node, an embodiment of the present invention also provides a communication node, including:

The first sending module 2410 is used to send the power control parameter media access control MAC signaling; the power control parameter MAC signaling is used to instruct the first communication node to update the pre-configured power according to the power control parameter information in the power control parameter MAC signaling Control parameter pool.

FIG. 25 is a schematic structural diagram of a first communication node according to an embodiment of the present application. As shown in FIG. 25, the first communication node 130 provided in an embodiment of the present application includes a memory 1303 and a processor 1304. The first communication node 130 may further include an interface 1301 and a bus 1302. The interface 1301, the memory 1303 and the processor 1304 are connected through a bus 1302. The memory 1303 is used to store instructions. The processor 1304 is configured to read instructions to execute the technical solutions of the foregoing method embodiments applied to the first communication node. The implementation principles and technical effects are similar, and details are not described herein again.

FIG. 26 is a schematic structural diagram of a second communication node according to an embodiment of the application. As shown in FIG. 26, the second communication node 140 provided in the embodiment of the application includes a memory 1403 and a processor 1404. The second communication node 140 may further include an interface 1401 and a bus 1402. The interface 1401, the memory 1403 and the processor 1404 are connected through a bus 1402. The memory 1403 is used to store instructions. The processor 1404 is configured to read instructions to execute the technical solutions of the foregoing method embodiments applied to the second communication node. The implementation principles and technical effects are similar, and details are not described herein again.

The above are only exemplary embodiments of the present application, and are not used to limit the protection scope of the present application.

In general, the various embodiments of the present application can be implemented in hardware or dedicated circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.

The embodiments of the present application may be implemented by executing computer program instructions by a data processor of a mobile device, for example, in a processor entity, or by hardware, or by a combination of software and hardware. Computer program instructions can be assembly instructions, Industry Subversive Alliance (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, status setting data, or written in any combination of one or more programming languages Source code or object code.

The block diagram of any logical flow in the drawings of the present application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program can be stored on the memory. The memory can be of any type suitable for the local technical environment and can be implemented using any suitable data storage technology. The memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory, etc. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. RAM can include many forms, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronization Dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access Memory (Direct Rambus RAM, DR RAM). The memory of the system and method described in this application includes but is not limited to these and any other suitable types of memory.

The processor in the embodiment of the present application may be of any type suitable for the local technical environment, such as but not limited to general-purpose computers, special-purpose computers, microprocessors, digital signal processors (Digital Signal Processor, DSP), and application specific integrated circuits (Application Specific Integrated Circuits). Integrated Circuit, ASIC), Field-Programmable Gate Array (FGPA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or processors based on multi-core processor architecture. The general-purpose processor may be a microprocessor or any conventional processor. The foregoing processor may implement or execute the steps of each method disclosed in the embodiments of the present application. The software module may be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

Claims

A power control method includes:

Receiving a power control parameter media access control MAC signaling, where the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication;

Determine, according to the power control parameter information, the power control parameter of the associated uplink transmission that the reference signal indicates.
The power control method according to claim 1, wherein the uplink transmission includes at least one of the following: physical uplink control channel PUCCH transmission, physical uplink shared channel PUSCH transmission, sounding reference signal SRS transmission, physical random access channel PRACH transmission .
The power control method according to claim 1, wherein the power control parameter MAC signaling includes one of the following:

The spatial relationship of the PUCCH is the activation state MAC control unit CE, the SRS activation state MAC CE, and the dedicated power control parameter MAC CE.
The power control method according to claim 3, wherein the spatial relationship activation state MAC CE of the PUCCH includes PUCCH power control parameter information;

The SRS active state MAC CE includes at least one of the following: power control parameter information of PUSCH, and power control parameter information of SRS;

The dedicated power control parameter MAC CE includes at least one of the following: PUCCH power control parameter information, PUSCH power control parameter information, SRS power control parameter information, PRACH power control parameter information.
The power control method according to claim 1, wherein the power control parameter information includes at least one of the following:

Power control parameter status information, used to indicate whether the power control parameter MAC signaling includes power control parameter indication information;

Indication information of power control parameters.
The power control method according to claim 5, wherein the indication information of the power control parameter includes at least one of the following:

The power control parameter set number is used to determine at least one power control parameter set in the pre-configured power control parameter set pool;

Power control parameters;

The power control parameter number is used to determine at least one power control parameter in a pre-configured power control parameter pool.
The power control method according to claim 6, wherein the power control parameter set includes the power control parameter set number and at least one power control parameter or at least one power control parameter number corresponding to the power control parameter set number .
The power control method according to claim 6, wherein the power control parameter includes at least one of the following:

Open loop power control parameters, path loss measurement parameters and closed loop power control parameters;

The power control parameter number includes at least one of the following:

The open-loop power control parameter number, the path loss measurement parameter number, and the closed-loop power control number; wherein the open-loop power control parameter number is used to determine at least one open-loop power control parameter in a pre-configured open-loop power parameter pool, so The path loss measurement parameter number is used to determine at least one path loss measurement parameter in a preconfigured path loss measurement parameter pool; the closed loop power control number is used to determine at least one closed loop power control in a preconfigured closed loop power control parameter pool parameter.
The power control method according to claim 1, wherein the M bits of the power control parameter MAC signaling are used to carry the power control parameter information; the M bits represent power with a preset holding value The control parameter is maintained at the current value, the M bits indicate that the power control parameter is changed to at least one of the other power control parameter values except for the current value with a plurality of preset non-retention values, and the M is Positive integer.
The power control method according to claim 4, further comprising:

It is determined according to one of the following information that the power control parameter information of the SRS corresponds to an SRS resource set or that the power control parameter information of the SRS corresponds to the SRS resource in the SRS resource set:

The purpose of the SRS resource collection;

The corresponding type information of the SRS power control parameter included in the power control parameter MAC signaling, and the corresponding type information of the SRS power control parameter is used to indicate that the power control parameter information corresponds to the SRS resource set or the power control The parameter information corresponds to the SRS resource in the SRS resource set.
The power control method according to claim 10, wherein the power control parameter information of the SRS corresponds to the SRS resource set or the power control parameter information of the SRS and the SRS resource set are determined according to the usage of the SRS resource set Corresponding to SRS resources in, including:

When the purpose of the SRS resource set is beam management, antenna selection or positioning, the power control parameter information of the SRS corresponds to the SRS resource set;

When the use of the SRS resource set is a codebook or a non-codebook, the power control parameter information of the SRS corresponds to each SRS resource in the SRS resource set.
The power control method according to claim 10, wherein, in a case where the power control parameter information of the SRS corresponds to the SRS resource set, the power control parameter information of the SRS includes a group of power control parameter indication information ；

In the case that the power control parameter information of the SRS corresponds to the SRS resource in the SRS resource set, the power control parameter information of the SRS includes at least one set of power control parameter indication information, and the at least one set of power control The indication information of the parameter respectively corresponds to at least one SRS resource in the SRS resource set.
The power control method according to claim 4, further comprising:

Determine the quantity of the PUSCH power control parameter information included in the power control parameter MAC signaling according to one of the following information:

The purpose of the SRS resource collection;

The number of values of the SRS resource indication field in the downlink control information DCI corresponding to the uplink transmission;

The parameter quantity information included in the power control parameter MAC signaling.
The power control method according to claim 13, wherein determining the number of power control parameter information of the PUSCH included in the power control parameter MAC signaling according to the usage of the SRS resource set includes one of the following:

In the case where the use of the SRS resource set is a codebook, determining the amount of power control parameter information of the PUSCH according to the number of SRS resources in the SRS resource set;

In the case that the use of the SRS resource set is not a codebook, the number of power control parameter information for the PUSCH is determined according to at least one of the following in the SRS resource set: the combined number of SRS resources, the maximum rank supported by the communication node .
The power control method according to claim 1, wherein the reference signal indication includes at least one of the following: SRS resource indication, SRS resource set indication, transmission configuration indication, and spatial relationship indication.
The power control method according to claim 1, wherein the corresponding relationship between the reference signal indication and the power control parameter information includes at least one of the following:

Each reference signal indicator corresponds to a path loss measurement parameter;

Each reference signal indication corresponds to at least one open loop power control parameter, and the at least one open loop power control parameter corresponds to at least one type of uplink transmission;

Each reference signal indication corresponds to at least one closed-loop power control parameter, and the at least one closed-loop power control parameter corresponds to at least one type of uplink transmission.
The power control method according to claim 1, wherein the power control parameter MAC signaling further includes transmission type information, and the transmission type information is used to identify the type of uplink transmission.
The power control method according to claim 1, further comprising:

Sending capability information to the base station; the capability information is used to indicate whether the communication node supports MAC signaling to modify power control parameters.
A power control method includes:

Receive power control parameter media access control MAC signaling;

Update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.
The power control method according to claim 19, wherein the power control parameter MAC signaling includes one or more sets of power control parameter information, and the one or more sets of power control parameter information are used to indicate the power A group of power control parameters or groups of power control parameters with numbers from small to large in the control parameter pool.
The power control method according to claim 19, wherein the power control parameter information in the power control parameter MAC signaling is used to update at least one of the following: the power control parameter pool of the physical uplink control channel PUSCH, the physical uplink shared channel The power control parameter pool of PUCCH and the power control parameter pool of sounding reference signal SRS.
A power control method includes:

Receive power control parameter media access control MAC signaling;

The power control parameter of the physical uplink shared channel PUSCH for which the authorization is configured is determined according to the power control parameter information in the power control parameter MAC signaling.
The power control method according to claim 22, wherein the power control parameter information includes power control parameter indication information;

The power control parameter information further includes at least one of the following: type indication information of the authorized PUSCH configured and the number of the authorized PUSCH configured.
The power control method according to claim 23, wherein:

The indication information of the power control parameter is used to indicate the power control parameter of the PUSCH authorized by the type 2 configuration; or,

At least one of the type of the authorized PUSCH and the number of the authorized PUSCH are used to determine at least one set of power control parameters for the authorized PUSCH, and the indication information of the power control parameters is used to indicate the at least one set of configurations Power control parameters of the authorized PUSCH.
A power control method includes:

Send power control parameter media access control MAC signaling; the power control parameter MAC signaling includes a reference signal indication and power control parameter information corresponding to the reference signal indication; the power control parameter MAC signaling is used to indicate the first The communication node determines according to the power control parameter information that the reference signal indicates the power control parameter of the associated uplink transmission.
The power control method according to claim 25, wherein the power control parameter MAC signaling comprises one of the following:

The spatial relationship of the physical uplink control channel PUCCH is the activation state MAC control unit CE, the sounding reference signal SRS activation state MAC CE, and the dedicated power control parameter MAC CE.
The power control method according to claim 26, wherein the spatial relationship activation state MAC CE of the PUCCH includes PUCCH power control parameter information;

The SRS active state MAC CE includes at least one of the following: power control parameter information of PUSCH, and power control parameter information of SRS;

The dedicated power control parameter MAC CE includes at least one of the following: PUCCH power control parameter information, PUSCH power control parameter information, SRS power control parameter information, PRACH power control parameter information.
The power control method according to claim 25, wherein the power control parameter information includes at least one of the following:

Power control parameter status information, used to indicate whether the power control parameter MAC signaling includes power control parameter indication information;

Indication information of power control parameters.
The power control method according to claim 28, wherein the indication information of the power control parameter includes at least one of the following:

The power control parameter set number is used to determine at least one power control parameter set in the pre-configured power control parameter set pool;

Power control parameters;

The power control parameter number is used to determine at least one power control parameter in a pre-configured power control parameter pool.
The power control method according to claim 25, wherein the reference signal indication comprises at least one of the following: SRS resource indication, SRS resource set indication, transmission configuration indication, and spatial relationship indication.
The power control method according to claim 25, wherein the corresponding relationship between the reference signal indication and the power control parameter information comprises at least one of the following:

Each reference signal indicator corresponds to a path loss measurement parameter;

Each reference signal indication corresponds to at least one open loop power control parameter, and the at least one open loop power control parameter corresponds to at least one type of uplink transmission;

Each reference signal indication corresponds to at least one closed-loop power control parameter, and the at least one closed-loop power control parameter corresponds to at least one type of uplink transmission.
The power control method according to claim 25, wherein the power control parameter MAC signaling further includes transmission type information, and the transmission type information is used to identify the type of the uplink transmission.
A power control method includes:

Sending power control parameter media access control MAC signaling; the power control parameter MAC signaling is used to instruct the first communication node to update the pre-configured power control parameter pool according to the power control parameter information in the power control parameter MAC signaling.
A communication node includes a processor configured to execute the power control method according to any one of claims 1 to 33 when running a program.
A storage medium storing a computer program, which when executed by a processor, implements the power control method of any one of claims 1-33.