CN116939795A

CN116939795A - Power control method and device

Info

Publication number: CN116939795A
Application number: CN202210352050.0A
Authority: CN
Inventors: 骆亚娟; 李辉; 高秋彬; 黄秋萍; 宋磊
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2023-10-24

Abstract

The embodiment of the application provides a power control method and a device, wherein the method comprises the following steps: determining the corresponding transmission power of each TRP; the transmitting power corresponding to each TRP is the transmitting power of the terminal for transmitting uplink signals to each TRP respectively; and reducing the transmission power corresponding to one or more target TRPs under the condition that the sum of the transmission powers corresponding to all the TRPs is larger than the maximum transmission power of the terminal, wherein the sum of the transmission powers corresponding to all the TRPs after power reduction is not larger than the maximum transmission power. The power control method and the device provided by the embodiment of the application ensure the normal transmission of the uplink signal by reducing the transmission power corresponding to one or more target TRPs under the condition that the sum of the transmission power corresponding to all TRPs is larger than the maximum transmission power of the terminal.

Description

Power control method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a power control method and apparatus.

Background

The transmission of the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH)/physical uplink control channel (Physical Uplink Control Channel, PUCCH) in the existing multiple transmission and reception point (Multi Transmitting Receiving Point, MTRP) scenario adopts a time division multiplexing (Time Division Multiplexing, TDM) repetition (repetition) manner, and the power control of different transmission and reception points (Transmitting Receiving Point, TRP) is performed independently.

In the MTRP scenario, when the terminal transmits uplink signals to the multiple TRPs simultaneously, because the timings of the different TRPs are different, the timings are different, and if signals transmitted to the different TRPs overlap, the situation that the total radio frequency power when the terminal transmits uplink signals to the multiple TRPs simultaneously is greater than the maximum radio frequency power of the terminal may occur, so that the terminal cannot transmit uplink signals to the multiple TRPs simultaneously according to the desired radio frequency power.

Disclosure of Invention

The embodiment of the application provides a power control method and a power control device, which are used for solving the technical problem that the total radio frequency power of a terminal is larger than the maximum radio frequency power of the terminal when the terminal simultaneously transmits uplink signals to a plurality of TRPs in the prior art.

In a first aspect, an embodiment of the present application provides a power control method, including:

determining the corresponding transmission power of each TRP; the transmitting power corresponding to each TRP is the transmitting power of the terminal for transmitting uplink signals to each TRP respectively;

and reducing the transmission power corresponding to one or more target TRPs under the condition that the sum of the transmission powers corresponding to all the TRPs is larger than the maximum transmission power of the terminal, wherein the sum of the transmission powers corresponding to all the TRPs after power reduction is not larger than the maximum transmission power.

In some embodiments, the reducing the transmission power corresponding to the one or more target TRPs includes:

and reducing the transmission power corresponding to the one or more target TRPs based on a predetermined reduction factor so as to reduce the transmission power corresponding to the one or more target TRPs.

In some embodiments, before the reducing the transmission power corresponding to the one or more target TRPs based on the predetermined reduction factor, the method further includes:

acquiring a first configuration message sent by network equipment; the first configuration message is used for indicating the reduction factor;

the reduction factor is determined based on the first configuration message.

the reduction factor is determined based on a relationship between a sum of transmission powers corresponding to all the TRPs and the maximum transmission power.

In some embodiments, the determining the reduction factor based on a relationship between a sum of transmission powers corresponding to all TRPs and the maximum transmission power includes:

determining the reduction factor based on the ratio of the sum of all TRP corresponding transmission powers to the maximum transmission power;

Alternatively, it includes:

the reduction factor is determined based on the sum of all the TRPs' corresponding transmit powers minus the difference in the maximum transmit powers.

In some embodiments, before the reducing the transmission power corresponding to the one or more target TRPs, the method further includes:

acquiring a second configuration message sent by the network equipment; the second configuration message is for indicating the one or more target TRPs;

the one or more target TRPs are determined based on the second configuration message.

In some embodiments, the one or more target TRPs are one or more TRPs ordered first after all TRPs are ordered in order of the corresponding path loss from greater to lesser;

or the one or more target TRPs are one or more TRPs which are ranked later after all TRPs are ranked according to the sequence from the larger path loss to the smaller path loss;

or the one or more target TRPs are one or more TRPs which are ranked first after all TRPs are ranked according to the sequence from the big power target value to the small power target value;

or, the one or more target TRPs are one or more TRPs which are ranked later after all TRPs are ranked according to the sequence from the big power target value to the small power target value;

Or the one or more target TRPs are one or more TRPs which are ranked first after all TRPs are ranked according to the sequence from the big to the small of the corresponding path loss compensation factors;

or the one or more target TRPs are one or more TRPs which are ranked later after all TRPs are ranked according to the sequence from the big to the small of the corresponding path loss compensation factors;

or the one or more target TRPs are one or more TRPs which are ranked at the front after all TRPs are ranked according to the sequence from big to small of the corresponding closed loop power control state indexes;

or, the one or more target TRPs are one or more TRPs which are ranked later after all TRPs are ranked according to the sequence from big to small according to the corresponding closed loop power control state index.

the one or more target TRPs are determined based on the power control parameter of each TRP.

In some embodiments, the determining the one or more target TRPs based on the power control parameter for each TRP comprises:

in the case that the power control parameter is a path loss, ordering all TRPs in order of the corresponding path loss from large to small, and taking one or more TRPs ordered at the front as the one or more target TRPs; or ordering all TRPs in order of the corresponding path loss from large to small, so as to order one or more TRPs at the back as one or more target TRPs;

Or, in the case that the power control parameter is a power target value, sorting all the TRPs in order of the corresponding power target value from large to small, to sort the one or more TRPs in front as the one or more target TRPs; or ordering all TRPs from large to small according to the corresponding power target values, so as to order one or more TRPs to be used as one or more target TRPs;

or, in the case that the power control parameter is a path loss compensation factor, ordering all TRPs in order of the corresponding path loss compensation factor from large to small, to order the one or more TRPs in front as the one or more target TRPs; or ordering all TRPs in order of the corresponding path loss compensation factors from large to small, and taking one or more TRPs which are ordered later as the one or more target TRPs;

or, in the case that the power control parameter is a closed-loop power control state index, ordering all the TRPs according to the order from the large to the small of the corresponding closed-loop power control state index, so as to use one or more TRPs which are ordered earlier as the one or more target TRPs; or ordering all TRPs in the order from the large to the small according to the corresponding closed loop power control state index, so as to order one or more TRPs at the back as the one or more target TRPs.

the one or more target TRPs are determined based on the priority of the transmission content to which each TRP corresponds.

In some embodiments, the priority of the transmission content is inversely related to the probability that the TRP is determined to be the one or more target TRPs;

alternatively, the priority of the transmission content is positively correlated with the probability that the TRP is determined to be the one or more target TRPs.

In some embodiments, the following transmissions decrease in priority from high to low: HARQ-ACK, SRS, CSI.

In some embodiments, after the transmission power corresponding to the one or more target TRPs is reduced to the first threshold value, if the sum of the transmission powers corresponding to all the TRPs is not greater than the maximum transmission power, transmission of the uplink signal to the one or more target TRPs is stopped.

In some embodiments, the uplink signal refers to a signal transmitted on PUSCH or PUCCH.

In some embodiments, the terminal has dynamic power sharing capabilities.

In some embodiments, the determining the transmission power corresponding to each TRP includes:

And determining the transmission power corresponding to each TRP according to one or more groups of power control parameters associated with the TCI state indicated by the network equipment.

In some embodiments, the determining the transmission power corresponding to each TRP according to the multiple sets of power control parameters associated with the TCI state indicated by the network device includes:

acquiring a high-level signaling sent by network equipment and used for indicating a target group power control parameter in the multiple groups of power control parameters;

and determining the transmission power corresponding to each TRP according to the target group power control parameters associated with the TCI state.

In a second aspect, an embodiment of the present application provides a power control method, including:

determining a set of target power control parameter values based on the power control parameter values corresponding to each TRP;

calculating one total transmission power corresponding to all TRPs based on the target power control parameter value;

determining the transmission power corresponding to each TRP based on the total transmission power; the sum of the transmission powers corresponding to all TRPs is equal to the total transmission power.

In some embodiments, the target power control parameter value is the maximum of the target power control parameter values corresponding to all TRPs;

or the target power control parameter value is the minimum value of the target power control parameter values corresponding to all TRPs;

Or the target power control parameter value is an average value of target power control parameter values corresponding to all TRPs.

In some embodiments, the determining the transmission power corresponding to each TRP based on the total transmission power includes:

determining the transmission power corresponding to each TRP based on the total transmission power and a first ratio value under the condition that the power control parameter is path loss; the first ratio is the ratio of the path loss corresponding to each TRP to the sum of the path losses corresponding to all TRPs;

or determining the transmission power corresponding to each TRP based on the total transmission power and a second ratio under the condition that the power control parameter is a power target value; the second ratio is the ratio of the power target value corresponding to each TRP to the sum of the power target values corresponding to all TRPs;

or, if the power control parameter is a path loss compensation factor, determining a transmission power corresponding to each TRP based on the total transmission power and a third ratio; the third ratio is the ratio of the path loss compensation factor corresponding to each TRP to the sum of the path loss compensation factors corresponding to all TRPs;

or determining the transmission power corresponding to each TRP based on the total transmission power and a fourth ratio under the condition that the power control parameter is a closed-loop power control state index; the fourth ratio is the ratio of the closed loop power control state index corresponding to each TRP to the sum of the closed loop power control state indexes corresponding to all TRPs.

determining a power duty cycle corresponding to each TRP based on the priority of the transmission content corresponding to each TRP;

and determining the transmission power corresponding to each TRP based on the total transmission power and the power duty ratio corresponding to each TRP.

In a third aspect, an embodiment of the present application provides a terminal, including a memory, a transceiver, and a processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

The reduction factor is determined based on the first configuration message.

alternatively, it includes:

In some embodiments, the terminal has dynamic power sharing capabilities.

In a fourth aspect, an embodiment of the present application provides a terminal, including a memory, a transceiver, and a processor;

In a fifth aspect, an embodiment of the present application provides a power control apparatus, including:

a first determining module, configured to determine a transmission power corresponding to each TRP; the transmitting power corresponding to each TRP is the transmitting power of the terminal for transmitting uplink signals to each TRP respectively;

and the control module is used for reducing the transmission power corresponding to one or more target TRPs under the condition that the sum of the transmission power corresponding to all the TRPs is larger than the maximum transmission power of the terminal, and the sum of the transmission power corresponding to all the TRPs after power reduction is not larger than the maximum transmission power.

In a sixth aspect, an embodiment of the present application provides a power control apparatus, including:

the second determining module is used for determining a set of target power control parameter values based on the power control parameter values corresponding to each TRP;

a calculation module, configured to calculate a total transmission power corresponding to all TRPs based on the target power control parameter value;

a third determining module, configured to determine a transmission power corresponding to each TRP based on the total transmission power; the sum of the transmission powers corresponding to all TRPs is equal to the total transmission power.

In a seventh aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing a processor to execute the power control method according to the first or second aspect described above.

In an eighth aspect, an embodiment of the present application further provides a computer-readable storage medium storing a computer program for causing a computer to execute the power control method according to the first aspect or the second aspect described above.

In a ninth aspect, an embodiment of the present application further provides a communication device readable storage medium storing a computer program for causing a communication device to execute the power control method according to the first or second aspect described above.

In a tenth aspect, embodiments of the present application further provide a chip product readable storage medium storing a computer program for causing a chip product to execute the power control method according to the first or second aspect described above.

The power control method and the device provided by the embodiment of the application ensure the normal transmission of the uplink signal by reducing the transmission power corresponding to one or more target TRPs under the condition that the sum of the transmission power corresponding to all TRPs is larger than the maximum transmission power of the terminal.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a power control method according to an embodiment of the present application;

fig. 2 is a schematic diagram of PUCCH spatial relationship activation/deactivation MAC CE provided by an embodiment of the present application;

FIG. 3 is a second flowchart of a power control method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 5 is a second schematic diagram of a terminal according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a power control device according to an embodiment of the present application;

fig. 7 is a second schematic structural diagram of a power control device according to an embodiment of the present application.

Detailed Description

In the related art, power control for PUCCH is achieved by configuring corresponding power control parameters (power target value (P0), path loss (abbreviated as "path loss"), path loss compensation factor (α), path loss reference signal ID, and closed loop power control state index (closed loop power index)) through radio resource control (Radio Resource Control, RRC) signaling (PUCCH-spatial relation info), and then activating one set of the power control parameters through a medium access control unit (Media Access Control Control Element, MAC CE) signaling (MAC CE per PUCCH resource). For closed loop power control, the transmit power control (Transmission Power Control, TPC) field in the downlink control information (Downlink Control Information, DCI) is used for indication. The main idea is to use power control for PUCCH in MTRP transmission independently for different TRPs, including P0, path loss reference signal ID, closedLoopIndex and TPC in DCI.

Specifically, the power control mechanism for PUCCH is to activate the power control parameters of PUCCH resources corresponding to the respective TRPs through MAC CE signaling.

Specifically, taking two TRP as an example, the design of the MAC CE and whether the power control parameters corresponding to the PUCCH resources are configured by one set of parameters or the design of adding a new configuration of the power control parameters corresponding to the second TRP is determined by the radio access network 2 (Radio Access Network, ran 2). For closed loop power control adjustment of PUCCH in MTRP scenario, first, the terminal may report whether it supports the capability of configuring the second TPC domain, and for DCI format (format) 1_1/1_2, the base station may configure the second TPC domain through RRC signaling. Each TPC domain corresponds to one closedloopidex and two TRP domains correspond to closedloopidex 0 and closedloopidex 1, respectively. When two corresponding closplop indexes are the same, the TPC domain corresponding to the closplop index is a valid domain, the other TPC domain is not used, and the unused TPC domain is not used for calculation of TPC cumulative values. When the RRC signaling does not configure the second TPC field for DCI format 1_1/1_2, only one TPC field is in DCI format 1_1/1_2, and the value of this TPC field is used for all the closedloopcdex where the scheduled PUCCH is configured.

For power control of the PUSCH, the base station is realized by RRC configuration of SRI-PUSCH-PowerControl, SRI-PUSCH-PowerControl including SRI-PUSCH-PowerControl ID, SRI-PUSCH-PathlossReferenceRS-Id, SRI-P0-PUSCH-AlphaSetId and SRI-PUSCH-ClosedLoopIndex.

SRI-PUSCH-PowerControl associates an indication of a sounding reference information (Sounding Reference Information, SRI) field in DCI scheduling PUSCH with PUSCH-PowerControl. When the base station schedules the PUSCH through the SRI domain in the DCI, the terminal determines the SRI-PUSCH-PatholossReferenceRS-Id, the SRI-P0-PUSCH-AlphaSetId and the SRI-PUSCH-ClosedLoopIndex according to the mapping relation between the SRI domain and the SRI-PUSCH-PowerControlID according to the indication of the SRI domain, thereby further determining the path loss reference signals, P0, alpha and closedLoopIndex contained in the PUSCH-PowerControl.

And (3) enhancing the PUSCH transmission in the MTRP scene, and respectively indicating the power control parameter sets of the two TRPs by using two SRI domains in the DCI through the MTRP PUSCHtransmission scheduled by DCI format0_1/0_2, wherein the association relation between the SRI domains and the two power control parameter sets is determined by the RAN 2. The schemes considered by RAN1 include: the second RRC configuration SRI-PUSCH-PowerControl is added, corresponding to the second TRP or adding an SRS resource set (SRS resource set) ID in the SRI-PUSCH-PowerControl, and the SRI-PUSCH-PowerControl is selected based on the SRS resource set ID.

For closed loop power control adjustment of PUSCH in MTRP scene, the terminal first reports whether it supports the capability of configuring the second TPC domain. For DCI format0_1/0_2, the base station may configure the second TPC field through RRC signaling, and when the RRC signaling configures the second TPC field for DCI format0_1/0_2, each TPC field corresponds to one closed looopindex. When the RRC signaling does not configure the second TPC field for DCI format0_1/0_2, only one TPC field is in DCI format0_1/0_2, and the value of this TPC is used for all the closedloopidex of the scheduled PUSCH.

The PUSCH/PUCCH transmission in the existing MTRP scenario adopts a time division multiplexing (Time Division Multiplexing, TDM) repetition (repetition) method, and power control is performed independently for power control of different TRPs. The power control and allocation problems when a terminal simultaneously transmits an uplink signal to two or more TRPs in the MTRP scenario are not considered. For example, in the MTRP scenario, when the terminal transmits an uplink signal to two TRPs simultaneously, the terminal determines the power when transmitting PUSCH to each TRP by the following formula (for example, PUSCH channel):

wherein, the power when PUSCH is transmitted to TRP1 is PC1, the power when PUSCH is uplink transmitted to TRP2 is PC2, because the timing of TRP1 and TRP2 is different, the timing is different, if the transmission signals to TRP1 and TRP2 overlap, and the sum of PC1 and PC2 is greater than the maximum radio frequency power (ptotal_max) of the terminal, at this time, the terminal should allocate the transmission power to TRP1 and TRP2 so as to satisfy the sum of PC1 and PC2 being equal to or less than ptotal_max. The power control mechanism in MTRP scenarios with the schemes in the related art has not been able to solve this problem.

Based on the above technical problems, an embodiment of the present application provides a power control method, which can ensure that the sum of powers of signals sent to multiple TRPs by a terminal is less than or equal to the maximum radio frequency power of the terminal.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Fig. 1 is a schematic flow chart of a power control method according to an embodiment of the present application, and as shown in fig. 1, an embodiment of the present application provides a power control method, an execution body of which may be a terminal, for example, a mobile phone. The method comprises the following steps:

step 101, determining the corresponding transmitting power of each TRP; the transmitting power corresponding to each TRP is the transmitting power of the terminal for transmitting the uplink signal to each TRP respectively.

Specifically, in the embodiment of the present application, considering use case (use case) of MTRP, a terminal is defined to have a power sharing capability, and the power sharing capability includes static power sharing and dynamic power sharing.

The static power sharing refers to that the base station pre-distributes uplink transmission power of the terminal to each TRP so as to ensure that when the terminal simultaneously transmits uplink signals to a plurality of TRPs, the sum of the transmission power corresponding to all the TRPs is not more than the maximum transmission power of the terminal.

Dynamic power sharing refers to that a terminal controls power according to actual conditions so as to ensure that when the terminal simultaneously transmits uplink signals to a plurality of TRPs, the sum of transmission power corresponding to all the TRPs is not greater than the maximum transmission power of the terminal.

In the dynamic power sharing scheme, a terminal first determines a transmission power corresponding to each TRP, where the transmission power corresponding to each TRP is a transmission power of a terminal transmitting an uplink signal to each TRP.

Taking the PUSCH channel as an example, the power when the terminal determines to send the PUSCH to each TRP is obtained by the above calculation formula, which is not described herein again.

For example, the transmission power of the terminal for transmitting uplink signals to TRP1 and TRP2 through PUSCH is PC1, respectively _PUSCH And PC2 _PUSCH The corresponding calculation formula is as follows:

wherein P is _CMAX1,f,c (i) And P _CMAX2,f,c (i) The maximum transmission power to TRP1 and to TRP2 respectively corresponding to the ith transmission time is independently configured by the base station through higher layer signaling. And->The target power values representing PUSCH corresponding to TRP1 and TRP2 are configured by higher layer signaling. j=0 stands for power control for random access Msg3 PUSCH; the parameter j=1 is used for power control of uplink scheduling-free transmission PUSCH; j (j)>And 1 is used for the rest of PUSCH application scenarios. />Representing the number of Physical Resources (PRBs) occupied by the terminal to transmit PUSCH at the ith PUSCH transmission opportunity. Alpha _1,b,f,c (j) And alpha _2,b,f,c (j) Is a path loss compensation factor corresponding to TRP1 and TRP 2. PL (PL) _1b,f,c (q _d ) And PL (PL) _2b,f,c (q _d ) Indicating the measured path loss values corresponding to TRP1 and TRP2 by the terminal. Delta _1TF,b,f,c (i) And delta _2TF,b,f,c (i) Representing the power offset determined by the modulation and coding strategy (Modulation and Coding Scheme, MCS) level. f (f) _1b,f,c (i, l) and f _2b,f,c (i, l) represents closed loop power adjustment values corresponding to TRP1 and TRP 2.

The transmission power of the terminal for transmitting uplink signals to TRP1 and TRP2 through the PUCCH is PC1 respectively _PUCCH And PC2 _PUCCH The corresponding calculation formula is as follows:

wherein P is _CMAX1,f,c (i) And P _CMAX2,f,c (i) The maximum transmission power to TRP1 and to TRP2 respectively corresponding to the ith transmission time is independently configured by the base station through higher layer signaling.And->The target power value representing PUCCH corresponding to TRP1 and TRP2 is configured by higher layer signaling. />Indicating the number of Physical Resources (PRBs) occupied by the terminal to transmit PUCCH at the ith PUCCH transmission opportunity. PL (PL) _1b,f,c (q _d ) And PL (PL) _2b,f,c (q _d ) Indicating the measured path loss values corresponding to TRP1 and TRP2 by the terminal. Delta _{2F_PUCCH} (F) And delta _{2F_PUCCH} (F) A power offset value of the PUCCH transmission format is defined, f=0 represents PUCCH format 0,F =1 represents PUCCH format 1, f=2 represents PUCCH format 2,F =3 represents PUCCH format 3. Delta _2TF,b,f,c (i) The amount of power adjustment on the uplink BWP b on carrier f of the primary cell c is shown. f (f) _1b,f,c (i, l) and f _2b,f,c (i, l) represents closed loop power adjustment values corresponding to TRP1 and TRP 2.

And 102, reducing the transmission power corresponding to one or more target TRPs under the condition that the sum of the transmission powers corresponding to all the TRPs is larger than the maximum transmission power of the terminal, wherein the sum of the transmission powers corresponding to all the TRPs after power reduction is not larger than the maximum transmission power.

Specifically, in the embodiment of the present application, after determining the transmission power corresponding to each TRP, the terminal needs to determine whether the sum of the transmission powers corresponding to all the TRPs is greater than the maximum transmission power of the terminal.

According to the power control method provided by the embodiment of the application, under the condition that the sum of the transmission power corresponding to all the TRPs is larger than the maximum transmission power of the terminal, the normal transmission of the uplink signal is ensured by reducing the transmission power corresponding to one or more target TRPs.

Specifically, in the embodiment of the present application, the network device decides which TRP (target TRP) corresponds to the uplink transmission power to be reduced.

The network device may send a configuration message in which one or more target TRPs are indicated.

The terminal acquires a configuration message sent by the network equipment and determines one or more target TRPs.

For example, the base station instructs to reduce the transmission power of the terminal to a certain TRP. The base station indication includes the base station indicating to the terminal to reduce the transmission power to a certain TRP through RRC or MAC CE. The indication of the power control parameter for a certain TRP comprises the following several ways:

The SRS resource set is associated with the TRP, e.g. the first TRP is represented by SRS resource set ID #1 and the SRS resource set id#2 represents the second TRP. SRS resource set ID is carried in the power control parameter configuration.

For one PUCCH resource, two sets of PUCCH power control parameters are configured, the system predefines that the first set of power control parameters corresponds to the PUCCH power control adjustment of the first TRP, and the second set of power control parameters corresponds to the PUCCH power control adjustment of the second TRP.

For one PUCCH resource, two sets of PUCCH-spatial relation info are configured, the system predefines that the first spatial relation info corresponds to a first TRP and the second spatial relation info corresponds to a second TRP.

Considering that PUCCH transmission is associated with downlink PDSCH, power control parameters are associated with coresetpoolndex contained in the control resource set (Control Resource Set, CORESET) where PDCCH of scheduling PDSCH is located. Such as coresetpoolndex, is carried in the power control parameters.

CORESETPoolIndex '1' represents TRP1 and CORESETPoolIndex '2' represents TRP2.

The power control parameters are associated with transmission configuration indication (Transmission Configuration Indication, TCI) states (states), and the beams transmitted in the TRP1 and TRP2 directions are represented by two TCI states indicated by one code point (codepoint) of the TCI states included in the DCI, and the power control parameters associated with the two TCI states represent the power control parameters at the time of power adjustment to the transmission of TRP1 and TRP2.

According to the power control method provided by the embodiment of the application, one or more target TRPs are configured through the network equipment, so that the consumption of terminal computing resources is reduced.

Specifically, in the embodiment of the present application, the network device determines which TRPs (target TRPs) correspond to the reduced uplink transmission power according to the power control parameter corresponding to each TRP.

After the network device determines the one or more target TRPs, the one or more target TRPs are indicated by a second configuration message.

The network device first obtains the corresponding power control parameters of each TRP, and determines one or more target TRPs according to the power parameters.

In the case that the power control parameter includes a path loss, the network device orders all the TRPs in order of the corresponding path loss from the higher one to the lower one, and then uses the one or more TRPs ordered earlier as one or more target TRPs.

In the case that the power control parameter includes a path loss, the network device orders all the TRPs in order of the corresponding path loss from the higher to the lower, and then uses the one or more TRPs ordered later as one or more target TRPs.

In the case that the power control parameter includes a power target value, the network device orders all the TRPs in the order of the corresponding power target value from large to small, and then uses the one or more TRPs ordered earlier as one or more target TRPs.

In the case that the power control parameter includes a power target value, the network device orders all the TRPs in the order from the higher to the lower corresponding power target values, and then uses the one or more TRPs ordered later as one or more target TRPs.

In the case that the power control parameter includes a path loss compensation factor, the network device orders all the TRPs in order of the corresponding path loss compensation factor from the higher order, and then uses the one or more TRPs ordered earlier as one or more target TRPs.

In the case that the power control parameter includes a path loss compensation factor, the network device orders all the TRPs in order of the corresponding path loss compensation factor from the higher order, and then uses the one or more TRPs ordered later as one or more target TRPs.

In the case that the power control parameter includes a closed-loop power control state index, the network device orders all the TRPs in the order from the top to the bottom according to the corresponding closed-loop power control state index, and then uses the one or more TRPs ordered earlier as one or more target TRPs.

In the case that the power control parameter includes a closed-loop power control state index, the network device orders all the TRPs in the order from the top to the bottom according to the corresponding closed-loop power control state index, and then uses one or more TRPs ordered later as one or more target TRPs.

According to the power control method provided by the embodiment of the application, one or more target TRPs are determined through the power control parameters, so that the accurate control of the terminal transmitting power is realized.

Specifically, in the embodiment of the present application, the terminal determines which TRPs (target TRPs) correspond to the reduced uplink transmission power according to the power control parameter of each TRP.

The terminal firstly acquires the power control parameters corresponding to each TRP, and determines one or more target TRPs according to the power parameters.

The power control parameters may include one or more of path loss, power target value, path loss compensation factor, closed loop power control state index.

According to the power control method provided by the embodiment of the application, the terminal determines one or more target TRPs according to the corresponding power control parameters of each TRP, so that the signaling overhead is reduced.

Specifically, in the embodiment of the present application, the terminal determines one or more target TRP through one or more of path loss, power target value, path loss compensation factor, and closed loop power control state index.

The manner in which the terminal determines the one or more target TRPs through the power control parameter is the same as the manner in which the network device determines the one or more target TRPs in the above embodiment, and reference may be made to the above embodiment, which is not repeated herein.

For example, the terminal side determines to reduce the transmission power of a certain TRP based on certain parameters including pathloss, P0, α, etc. For example, the terminal estimates path loss for TRP1 and TRP2 according to the formula according to the path loss reference signal as PL1 and PL2 respectively:

PL _b,f,c (q _d )＝referenceSignalPower–higher layer filtered RSRP

Wherein reference signalpower is the transmission power of the path loss reference signal configured by the base station, and higher layer filtered RSRP refers to the transmission power of the path loss reference signal q _d Reference signal received power (Reference Signal Receiving Power, RSRP) is measured and filtered.

If PL1/PL2>1, terminal reduces transmit power PC1 to TRP1/TRP2 _PUSCH 。

If PL2/PL1>1, terminal reduces transmit power PC2 to TRP2/TRP1 _PUSCH 。

For determining to reduce the transmission power of a certain TRP by P0, a method similar to the above method for determining to reduce the transmission power of a certain TRP by pathloss may be adopted, and will not be described herein.

Specifically, in the embodiment of the present application, the terminal determines which TRP (target TRP) corresponds to the uplink transmission power to be reduced according to the priority of the transmission content corresponding to each TRP.

The terminal firstly acquires the priority of the transmission contents corresponding to each TRP, and determines one or more target TRPs according to the priorities of the transmission contents.

The transmission contents corresponding to each TRP may include hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) Acknowledgement (ACK), sounding reference signal (Sounding Reference Signal, SRS), CSI, and the like.

According to the power control method provided by the embodiment of the application, the terminal determines one or more target TRPs according to the priority of the transmission content corresponding to each TRP, so that the signaling overhead is reduced.

Specifically, in an embodiment of the present application, the priority of the transmission content is inversely related to the probability that the TRP is determined as one or more target TRP.

That is, the higher the priority of the transmission content, the smaller the probability that the TRP is determined as one or more target TRPs; the lower the priority of the transmission content, the greater the probability that the TRP is determined to be the one or more target TRPs.

Alternatively, the priority of the transmission content is positively correlated with the probability that the TRP is determined to be one or more target TRPs.

That is, the higher the priority of the transmission content, the greater the probability that the TRP is determined to be one or more target TRPs; the lower the priority of the transmission content, the lower the probability that the TRP is determined to be the one or more target TRPs.

Specifically, in the embodiment of the present application, after determining the target TRP that needs to reduce the transmission power, the terminal needs to acquire a reduction factor, and reduce the transmission power corresponding to one or more target TRP by using the reduction factor, so as to reduce the transmission power corresponding to one or more target TRP.

It should be noted that: the number of determined reduction factors may be one, i.e. the one reduction factor is applicable to one or more target TRPs. The number of determined reduction factors may also be plural, i.e. each reduction factor is applicable to one target TRP.

According to the power control method provided by the embodiment of the application, under the condition that the sum of the transmission power corresponding to all the TRPs is larger than the maximum transmission power of the terminal, the transmission power corresponding to one or more target TRPs is reduced by the reduction factor, so that the normal transmission of an uplink signal is ensured.

the reduction factor is determined based on the first configuration message.

Specifically, in the embodiment of the present application, the reduction factor is configured by the network device.

First, the network device may determine a reduction factor based on the power control parameter corresponding to each TRP.

After determining the reduction factor, the network device indicates the reduction factor to the terminal via a first configuration message.

The terminal acquires a first configuration message sent by the network equipment, and determines a reduction factor based on the first configuration message.

For example, the reduction factor (beta) is configured to the terminal by the base station through higher layer signaling, the base station configures the reduction factor through RRC signaling, and the pseudo code is as follows:

/>

According to the power control method provided by the embodiment of the application, the reduction factor is configured through the network equipment, so that the calculated amount of the terminal is reduced.

alternatively, it includes:

Specifically, in the embodiment of the present application, the reduction factor is determined by the terminal itself.

The terminal may determine the reduction factor based on a ratio of a sum of transmission powers corresponding to all TRPs to a maximum transmission power.

For example, the transmission power of the terminal for transmitting uplink signals to TRP1 and TRP2 through PUSCH is PC1, respectively _PUSCH And PC2 _PUSCH 。

The reduction factor is determined by the terminal based on the following formula:

wherein beta is a reduction factor, PC _{total_max} PC1 is the maximum transmission power of the terminal _PUSCH For transmitting uplink signal transmission power to TRP1 by PUSCH, PC2 _PUSCH Transmitting to TRP2 through PUSCH for terminalThe transmission power of the uplink signal.

In addition, the terminal may also determine the reduction factor based on a difference of a sum of transmission powers corresponding to all TRPs minus a maximum transmission power.

For example, the transmission power of the terminal for transmitting uplink signals to TRP1, TRP2 and TRP3 via PUSCH is PC1, respectively _PUSCH 、OC2 _PUSCH And PC3 _PUSCH . It is determined that only TRP3 needs to be power reduced. At this time, the target difference value needs to be determined by the following formula:

PC _Δ ＝PC _{total_max} -(PC1 _PUSCH +PC2 _PUSCH )

wherein, PC _Δ For the target difference, PC _{total_max} PC1 is the maximum transmission power of the terminal _PUSCH For transmitting uplink signal transmission power to TRP1 by PUSCH, PC2 _PUSCH And transmitting the transmission power of the uplink signal to the TRP2 through the PUSCH for the terminal.

Then, based on the target difference, a reduction factor is determined, and the specific calculation mode can refer to the above ratio-based mode, which is not described herein.

According to the power control method provided by the embodiment of the application, the terminal determines the reduction factor, so that the signaling overhead is reduced.

Specifically, in the embodiment of the present application, in order to improve efficiency, the transmission power corresponding to one or more target TRPs is not always reduced.

After the transmission power corresponding to one or more target TRPs is reduced to the first threshold value, if the sum of the transmission powers corresponding to all TRPs is not greater than the maximum transmission power, stopping transmitting the uplink signal to the one or more target TRPs.

The first threshold value Xscale may be agreed in advance by a protocol, or may be configured by a network device.

According to the power control method provided by the embodiment of the application, after the transmission power corresponding to one or more target TRPs is reduced to the first threshold value, under the condition that the sum of the transmission powers corresponding to all TRPs is not more than the maximum transmission power, the uplink signal is stopped from being transmitted to one or more target TRPs, so that the efficiency of power control is improved.

Specifically, in the embodiment of the present application, the terminal determines the transmission power corresponding to each TRP according to one or more sets of power control parameters associated with the TCI state indicated by the network device.

Under the condition that the terminal determines the transmission power corresponding to each TRP according to a plurality of groups of power control parameters associated with the TCI state indicated by the network equipment, and the method comprises the following steps:

firstly, the terminal acquires a high-level signaling which is sent by the network equipment and used for indicating a target group power control parameter in a plurality of groups of power control parameters.

Then, the terminal determines the target group power control parameter according to the higher layer signaling, and determines the transmission power corresponding to each TRP according to the target group power control parameter associated with the TCI state.

For specific calculation of the transmission power, reference may be made to the above embodiments, and details are not repeated here.

According to the power control method provided by the embodiment of the application, the terminal determines the transmission power corresponding to each TRP according to one or more groups of power control parameters associated with the TCI state indicated by the network equipment, so that the accurate control of the power is further realized.

The method in the above embodiment is further described below with several specific examples.

Example 1, corresponding to PUSCH channel, reduces the transmit power of two TRPs, the reduction factor is determined by the terminal and the power reduction factor of two TRPs is the same.

First, the terminal notifies the base station of the dynamic power sharing capability through capability reporting. The base station configures SRI-PUSCH-PowerControl_1 and SRI-PUSCH-PowerControl_2 through RRC to correspond to TRP1 and TRP2 respectively. The pseudo code is as follows:

/>

the mapping relationship between the SRI encoder of the first SRI_1 domain and the SRI-PUSCH-PowerControlId_1 is {000- >0;001- >1;010- >2;011- >3;100- >4;101- >5;110- >6;111- >7}.

The mapping relationship between the SRI encoder of the second SRI_2 domain and the SRI-PUSCH-PowerControlId_2 is {000- >7;001- >6;010- >2;011- >5;100- >4;101- >3;110- >2;111- >1}.

At the nth time, the base station issues DCI format0_1 to schedule M-TRP PUSCH transmission, the DCI format0_1 comprises two SRI domains, SRI_1 and SRI_2.SRI_1 indicates that SRI codebook is 001, and SRI_2 indicates that SRI codebook is 101.

And the indication terminal uses SRI_1 to indicate the corresponding power control parameter as sending the PUSCH to the TRP1, and uses SRI_2 to indicate the corresponding power control parameter as sending the PUSCH to the TRP 2. Terminal receives baseThe station indication determines that the value of SRI-PUSCH-powercontrol id_1 is 1 according to the indication 001 of sri_1 and the mapping relation of sri_1 and SRI-PUSCH-powercontrol id_1, and the terminal determines that the value of SRI-PUSCH-powercontrol id_2 is 3 according to the indication 101 of sri_2 and the mapping relation of sri_2 and SRI-PUSCH-powercontrol id_2. The terminal further determines power control parameter sets P0-PUSCH-AlphaSet_1 and P0-PUSCH-AlphaSet_2 corresponding to the PUSCH transmitted to TRP1 and TRP2 according to the sri-PUSCH-PowerControlId_1 and the sri-PUSCH-PowerControlId_2. Meanwhile, the terminal respectively determines closed loop power control index values i_1 and i_2 for PUSCH transmission of TRP1 and TRP2 according to the sri-PUSCH-PowerControlId_1 and the sri-PUSCH-PowerControlId_2. The terminal calculates the PUSCH transmission power of the TRP1 and the TRP2 as PC1 respectively according to the determined power control factors { P0_1, alpha_1, closeLoopIndex_1}, { P0_2, alpha_2, closeLoopIndex_2}, and referring to the calculation formulas in the above embodiments _PUSCH And PC2 _PUSCH 。

Terminal judgment PC1 _PUSCH +PC2 _PUSCH >PC _{total_max} Is true, wherein PC _{total_max} The maximum radio frequency power of the terminal. The terminal determines to reduce the uplink transmission power for PC1 _PUSCH Reduced to beta PC1 _PUSCH . For PC2 _PUSCH Reduced to beta PC2 _PUSCH . The reduction factor beta is determined by the terminal based on the following formula:

wherein beta is a reduction factor, PC _{total_max} PC1 is the maximum transmission power of the terminal _PUSCH For transmitting uplink signal transmission power to TRP1 by PUSCH, PC2 _PUSCH And transmitting the transmission power of the uplink signal to the TRP2 through the PUSCH for the terminal.

Example 2, corresponding to PUSCH channel, reduces the transmit power to two TRPs, the reduction factor is configured by higher layer signaling.

First, the terminal notifies the base station of the dynamic power sharing capability through capability reporting. The base station configures SRI-PUSCH-PowerControl_1 and SRI-PUSCH-PowerControl_2 through RRC, and corresponds to TRP1 and TRP2 respectively, and the pseudo codes are as follows:

At the nth time, the base station issues a DCI format0_1 to schedule M-TRP PUSCH transmission, wherein the DCI format0_1 comprises two SRI domains, namely SRI_1 and SRI_2.SRI_1 indicates SRI_codebook as 001, and SRI_2 indicates SRI_codebook as 101.

And the indication terminal uses SRI_1 to indicate the corresponding power control parameter and power reduction factor beta to send the PUSCH to the TRP1, and uses SRI_2 to indicate the corresponding power control parameter and power reduction factor beta to send the PUSCH to the TRP 2. The terminal receives the instruction of the base station, determines that the value of SRI-PUSCH-powercontrol id_1 is 1 according to the instruction 001 of sri_1 and the mapping relation between sri_1 and SRI-PUSCH-powercontrol id_1, and determines that the value of SRI-PUSCH-powercontrol id_2 is 3 according to the instruction 101 of sri_2 and the mapping relation between sri_2 and SRI-PUSCH-powercontrol id_2. The terminal further determines power control parameter sets P0-PUSCH-AlphaSet_1 and P0-PUSCH-AlphaSet_2 and reduction factors beta1 and beta2 corresponding to the PUSCH transmitted to TRP1 and TRP2 according to the sri-PUSCH-PowerControlId_1 and the sri-PUSCH-PowerControlId_2, and simultaneously determines closed loop power control index values i_1 and i_2 for the PUSCH transmission of TRP1 and TRP2 according to the sri-PUSCH-PowerControlId_1 and the sri-PUSCH-PowerControlId_2. The terminal determines power control factors { P0_1, alpha_1, close LoopInd } ex_1} and { p0_2, alpha_2, closeloopcindix_2 }, and calculates the transmission powers of PUSCH for TRP1 and TRP2 respectively as PC1 with reference to the calculation formulas in the above embodiments, respectively _PUSCH And PC2 _PUSCH 。

Terminal judgment PC1 _PUSCH +PC2 _PUSCH >PC _{total_max} Whether or not it is true, wherein PC _{total_max} The maximum radio frequency power of the terminal. If the condition in the inequality is satisfied, the terminal reduces the uplink transmission power for PC1 _PUSCH Reduced to beta1 PC1 _PUSCH 。

For PC2 _PUsCH Reduced to beta2 PC2 _PUSCH If beta1 = beta2, it means that the power reduction of the transmit power of PUSCH for TRP1 and TRP2 is the same. The terminal reduces the transmission power until beta1 PC1 is satisfied _PUSCH +beta2·PC2 _PUsCH <＝PC _{total_max} 。

Example 3, corresponding to PUSCH channel, the terminal determines to reduce the transmission power to a certain TRP according to the path loss, while the terminal determines whether the current power of the branch of reduced power is less than a certain predefined threshold.

First, the terminal notifies the base station of the dynamic power sharing capability through capability reporting. The procedure of the base station transmitting the power control parameter of PUSCH to TRP1/TRP2 through RRC configuration is the same as in example 1. The terminal calculates the transmission powers of PUSCH for TRP1 and TRP2 respectively as PC1 according to the calculation formulas in the above embodiments _PUsCH And PC2 _PUSCH . Terminal judgment PC1 _PUSCH +PC2 _PUSCH >PC _{total_max} Is true, wherein PC _{total_max} The maximum radio frequency power of the terminal. Terminal determination to reduce uplink transmit power PC1 to TRP1 _PUSCH Or uplink transmission power PC2 to TRP2 _PUSCH . The determination mode is as follows:

the terminal determines SRI-PUSCH-powercontrol id_1 and SRI-PUSCH-powercontrol id_2, PUSCH-pathlos reference rs-id_1 and PUSCH-pathlos reference rs-id_1 according to the SRI1 and SRI2 indicated by the base station schedule. And further determining that the corresponding path loss reference signals are q respectively according to the following relations _d1 And q _d2 The pseudo code is as follows:

/>

the terminal determines the path loss PL1 and PL2 corresponding to the PUSCH transmission to TRP1 and TRP2 according to the following formula:

PL _b,f,c (q _d )＝referenceSignalPower–higher layer filtered RSRP

where reference signaling power is the transmission power of the path loss reference signal configured by the base station, and higher layer filtered RSRP refers to measuring and filtering the L1-RSRP of the path loss reference signal.

Then, the terminal makes the following judgment:

if PL1/PL2>1, terminal reduces transmit power PC1 to TRP1 _PUSCH 。

If PL2/PL1>1, terminal reduces transmit power PC2 to TRP2 _PUSCH 。

The terminal determines whether the power of the branch of reduced power is less than a certain threshold XsCale while reducing the transmit power, e.g., the terminal determines PC1 after reducing the transmit power of TRP1 _PUSCH <Xscale is true. If the terminal judges PC1 _PUSCH <Xscale and PC1 _PUSCH +PC2 _PUSCH ＞PC _{total_max} The terminal stops transmitting PUSCH to TRP 1. PC2 _PUSCH Similar to the case of (a). Wherein Xscale is configured to the terminal by the base station through RRC signaling, and may also be obtained through a system predefined manner.

Example 4, a terminal determines a transmission power to a certain TRP according to a path loss in response to a PUCCH channel.

First, the terminal notifies the base station of the dynamic power sharing capability through capability reporting. The base station configures PUCCH resource #1 and corresponding PUCCH-SpatialReconnaiso through RRC. The base station activates the beam PUCCH-spacialrelation info_1 and PUCCH-spacialrelation info_2 (corresponding to the uplink transmission beams to TRP1 and TRP2, respectively) corresponding to PUCCH resource#1 through the MAC CE. Corresponding RRC configuration signaling and MAC CE activation signaling such asFIG. 2 shows S ₀ And S is ₁ 1,PUCCH Resource ID is taken as 1. The specific pseudo code is as follows:

and the terminal receives the indication of the base station, and determines a power control parameter and a closed loop power control index value of the PUCCH to be sent to TRP1 and TRP2 according to the indication of the base station. The terminal calculates the transmission power of PUCCH to TRP1 and TRP2 respectively to PC1 according to the determined power control factor and path loss reference signals { p0-PUCCH-Id-1, closed LoopIndex_1, PUCCH-PatholosReference RS-Id-1} { p0-PUCCH-Id-2, closed LoopIndex_2, PUCCH-PatholosReference RS-Id-2}, and the calculation formulas in the above embodiments _PUCCH And PC2 _PUCCH . Terminal judgment PC1 _PUCCH +PC2 _PUCCH >PC _{total_max} Wherein PC _{total_max} The maximum radio frequency power of the terminal. Terminal determination to reduce uplink transmit power PC1 to TRP1 _PUCCH Or uplink transmission power PC2 to TRP2 _PUCCH 。

The terminal determines corresponding PUCCH-pathlos reference RS-Id-1 and PUCCH-pathlos reference RS-Id-2 according to PUCCH-spacialRelationInfo_1 and PUCCH-spacialRelationInfo_2 activated by the base station through the MAC CE. And further determining that the corresponding path loss reference signals are q respectively according to the following relations _d1 And q _d2 The pseudo code is as follows:

and transmitting the path loss reference signals of the PUCCH to the TRP1 and the TRP2 correspondingly. The terminal determines path loss PL1 and PL2 corresponding to the transmission of PUCCH to TRP1 and TRP2 according to the following formula:

PL _b,f,c (q _d )＝referenceSignalPower–higher layer filtered RSRP

Then, the terminal makes the following judgment:

if PL1/PL2>1, terminal reduces transmit power PC1 to TRP1 _PUCCH 。

If PL2/PL1>1, terminal reduces transmit power PC2 to TRP2 _PUCCH 。

The terminal determines whether the power of the reduced power branch is less than a certain threshold Xscale while reducing the transmit power, e.g., after the terminal reduces the transmit power of TRP1, the terminal determines PC1 _PUCCH <Xscale is true. If the terminal judges PC1 _PUCCH <Xscale and PC1 _PUCCH +PC2 _PUCCH ＞PC _{total_max} The terminal stops transmitting PUCCH to TRP 1. PC2 _PUCCH Similar to the case of (a). Wherein Xscale is configured to the terminal by the base station through RRC signaling, and may also be obtained through a system predefined manner.

Fig. 3 is a second flowchart of a power control method according to an embodiment of the present application, as shown in fig. 3, where an execution body of the power control method may be a terminal, for example, a mobile phone, and the method includes:

step 301, determining a set of target power control parameter values based on the power control parameter values corresponding to each TRP.

Specifically, the power control parameter corresponding to each TRP may include a set of parameters such as a path loss reference signal, P0, α, and closedloopcindx, and in the embodiment of the present application, a set of target power control parameter values is determined according to a plurality of sets of power control parameters corresponding to a plurality of TRPs.

Determination methods include, but are not limited to, taking a maximum value, a minimum value, an average value, and the like.

Step 302, calculating a total transmitting power corresponding to all TRPs based on the target power control parameter value.

Specifically, in the embodiment of the present application, after the terminal determines the target power control parameter value, one total transmission power corresponding to all TRPs is calculated based on the set of target power control parameter values.

The specific calculation formula may refer to the above embodiment, and will not be described herein.

Step 303, determining a transmission power corresponding to each TRP based on the total transmission power; the sum of the transmission powers corresponding to all TRPs is equal to the total transmission power.

For example, the terminal transmits uplink signals to TRP1 and TRP2 through the PUSCH, determines a set of target power control parameters according to two sets of power control parameters corresponding to TRP1 and TRP2 respectively, and calculates a total transmission power PC corresponding to all TRPs according to the set of target power control parameters _PUCCH 。

The terminal may perform power allocation as follows:

transmit power to TRP1

Transmit power to TRP2

Wherein, PC _PUCCH Is the total power sent to TRP1 and TRP 2.

The method for determining the power allocation proportion by the power target value, the path loss compensation factor and the closed loop power control state index is the same as the method for determining the power allocation proportion by the path loss, and is not repeated here.

According to the power control method provided by the embodiment of the application, a set of target power control parameter values is determined according to a plurality of sets of power control parameters corresponding to a plurality of TRPs, the transmission power is calculated again and distributed to the plurality of TRPs, so that the sum of the transmission power corresponding to all the TRPs is not more than the maximum transmission power of the terminal, and the normal transmission of an uplink signal is ensured.

Specifically, in the embodiment of the present application, the terminal determines a power duty ratio corresponding to each TRP based on the priority of the transmission content corresponding to each TRP, and then determines a transmission power corresponding to each TRP based on the total transmission power and the power duty ratio corresponding to each TRP.

The power control method provided by the embodiment of the application distributes power to multiple TRPs according to the priority of the transmission content, ensures that the sum of the transmission power corresponding to all TRPs is not more than the maximum transmission power of the terminal, and ensures the normal transmission of uplink signals.

The method in the above embodiment is described below with a specific example:

example 5, a set of target power control parameter values is determined by a plurality of sets of power control parameters corresponding to a plurality of TRPs.

First, the terminal notifies the base station of the dynamic power sharing capability through capability reporting. The base station configures PUCCH resource #1 and corresponding PUCCH-SpatialReconnaiso through RRC. The base station activates the beam PUCCH-spacialrelation info_1 and PUCCH-spacialrelation info_2 (corresponding to the uplink transmission beams to TRP1 and TRP2, respectively) corresponding to PUCCH resource#1 through the MAC CE. The corresponding RRC configuration signaling and MAC CE activation signaling are shown in FIG. 2, where S ₀ And S is ₁ 1,PUCCH Resource ID is taken as 1. The specific pseudo code is as follows:

the terminal receives the indication of the base station, determines a set of power control parameters { p0-PUCCH-Id, closed LoopIndex, PUCCH-PatholossReference RS-Id }, calculates the transmission power of PUCCH for TRP1 and TRP2 to be integrated into PC according to the following formula _PUCCH ：

Terminal determines uplink transmission power PC1 to TRP1 _PUCCH And an uplink transmission power PC2 to TRP2 _PUCCH。 The terminal passes through the MAC according to the base stationCE-activated PUCCH-Spatial RelationInfo _1 and PUCCH-SpatialRecommendation Info_2 determine the corresponding PUCCH-Pat hlossReferenceRS-Id-1 and PUCCH-PathlossReferenceRS-Id-2. And further determining that the corresponding path loss reference signals are q respectively according to the following relations _d1 And q _d2 The specific pseudocode is as follows:

PL _b,f,c (q _d )＝referenceSignalPower–higher layer filtered RSRP

The terminal performs power allocation as follows:

transmit power to TRP1

Transmit power to TRP2

Wherein, PC _PUCCH Is the total power sent to TRP1 and TRP 2.

Fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application, and as shown in fig. 4, the terminal includes a memory 420, a transceiver 400, and a processor 410, where:

a memory 420 for storing a computer program; a transceiver 400 for transceiving data under the control of the processor 410; a processor 410 for reading the computer program in the memory 420 and performing the following operations:

Specifically, the transceiver 400 is configured to receive and transmit data under the control of the processor 410.

Wherein in fig. 4, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by processor 410 and various circuits of memory represented by memory 420, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 400 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The user interface 430 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 in performing operations.

In some embodiments, the processor 410 may be a CPU (Central processing Unit), ASIC (Application Specific Integrated Circuit ), FPGA (Field-Programmable Gate Array, field programmable Gate array) or CPLD (Complex Programmable Logic Device ), and the processor may also employ a multicore architecture.

The processor is operable to perform any of the methods provided by embodiments of the present application in accordance with the obtained executable instructions by invoking a computer program stored in a memory. The processor and the memory may also be physically separate.

the reduction factor is determined based on the first configuration message.

alternatively, it includes:

In some embodiments, the terminal has dynamic power sharing capabilities.

It should be noted that, the terminal provided by the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution body is a terminal, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the embodiment are omitted herein.

Fig. 5 is a second schematic structural diagram of a terminal according to an embodiment of the present application, as shown in fig. 5, the terminal includes a memory 520, a transceiver 500, and a processor 510, where:

a memory 520 for storing a computer program; a transceiver 500 for transceiving data under the control of the processor 510; a processor 510 for reading the computer program in the memory 520 and performing the following operations:

Specifically, the transceiver 500 is used to receive and transmit data under the control of the processor 510.

Where in FIG. 5, a bus architecture may comprise any number of interconnected buses and bridges, with various circuits of the one or more processors, as represented by processor 510, and the memory, as represented by memory 520, being linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 500 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium, including wireless channels, wired channels, optical cables, etc. The user interface 530 may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 510 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 510 in performing operations.

In some embodiments, processor 510 may be a CPU (Central processing Unit), ASIC (Application Specific Integrated Circuit ), FPGA (Field-Programmable Gate Array, field programmable Gate array) or CPLD (Complex Programmable Logic Device ), which may also employ a multi-core architecture.

Fig. 6 is one of schematic structural diagrams of a power control device according to an embodiment of the present application, and as shown in fig. 6, the embodiment of the present application provides a power control device, including a first determining module 601 and a control module 602, where:

the reduction factor is determined based on the first configuration message.

Alternatively, it includes:

In some embodiments, the terminal has dynamic power sharing capabilities.

Specifically, the power control device provided by the embodiment of the present application can implement all the method steps implemented by the method embodiment in which the execution body is a terminal, and can achieve the same technical effects, and the same parts and beneficial effects as those of the method embodiment in the embodiment are not described in detail herein.

Fig. 7 is one of schematic structural diagrams of a power control device according to an embodiment of the present application, as shown in fig. 7, where the embodiment of the present application provides a power control device, including a second determining module 701, a calculating module 702, and a third determining module 703, where:

the second determining module 701 is configured to determine a set of target power control parameter values based on the power control parameter values corresponding to each TRP; the calculating module 702 is configured to calculate a total transmission power corresponding to all TRPs based on the target power control parameter value; a third determining module 703 is configured to determine a transmission power corresponding to each TRP based on the total transmission power; the sum of the transmission powers corresponding to all TRPs is equal to the total transmission power.

It should be noted that the division of the units/modules in the above embodiments of the present application is merely a logic function division, and other division manners may be implemented in practice. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In some embodiments, there is also provided a computer-readable storage medium storing a computer program for causing a computer to execute the power control method provided by the above-described method embodiments.

Specifically, the computer readable storage medium provided by the embodiment of the present application can implement all the method steps implemented by the above method embodiments and achieve the same technical effects, and the parts and beneficial effects that are the same as those of the method embodiments in this embodiment are not described in detail herein.

It should be noted that: the computer readable storage medium may be any available medium or data storage device that can be accessed by a processor including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CD, DVD, BD, HVD, etc.), and semiconductor memory (e.g., ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), solid State Disk (SSD)), etc.

In addition, it should be noted that: the terms "first," "second," and the like in embodiments of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more.

In the embodiment of the application, the term "and/or" describes the association relation of the association objects, which means that three relations can exist, for example, a and/or B can be expressed as follows: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

The term "plurality" in embodiments of the present application means two or more, and other adjectives are similar.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiment of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem, etc. The names of the terminal devices may also be different in different systems, for example in a 5G system, the terminal devices may be referred to as User Equipment (UE). The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and embodiments of the present application are not limited in this respect.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for the terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiment of the present application. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The term "determining B based on a" in the present application means that a is a factor to be considered in determining B. Not limited to "B can be determined based on A alone", it should also include: "B based on A and C", "B based on A, C and E", "C based on A, further B based on C", etc. Additionally, a may be included as a condition for determining B, for example, "when a satisfies a first condition, B is determined using a first method"; for another example, "when a satisfies the second condition, B" is determined, etc.; for another example, "when a satisfies the third condition, B" is determined based on the first parameter, and the like. Of course, a may be a condition in which a is a factor for determining B, for example, "when a satisfies the first condition, C is determined using the first method, and B is further determined based on C", or the like.

Multiple-input Multiple-output (Multi Input Multi Output, MIMO) transmissions may each be made between a network device and a terminal device using one or more antennas, and the MIMO transmissions may be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of the root antenna combinations.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A method of power control, comprising:

2. The power control method according to claim 1, wherein said reducing the transmission power corresponding to one or more target TRP comprises:

3. The power control method according to claim 2, wherein before the reducing the transmission power corresponding to the one or more target TRPs based on the predetermined reduction factor, further comprising:

The reduction factor is determined based on the first configuration message.

4. The power control method according to claim 2, wherein before the reducing the transmission power corresponding to the one or more target TRPs based on the predetermined reduction factor, further comprising:

5. The power control method according to claim 4, wherein the determining the reduction factor based on a relation between a sum of transmission powers corresponding to all TRPs and the maximum transmission power includes:

alternatively, it includes:

6. The power control method according to claim 1, further comprising, before said reducing the transmission power corresponding to the one or more target TRPs:

7. The power control method according to claim 6, wherein the one or more target TRPs are one or more TRPs ranked first after all TRPs are ranked in order of corresponding path loss from high to low;

8. The power control method according to claim 1, further comprising, before said reducing the transmission power corresponding to the one or more target TRPs:

9. The power control method of claim 8, wherein the determining the one or more target TRPs based on the power control parameter for each TRP comprises:

10. The power control method according to claim 1, further comprising, before said reducing the transmission power corresponding to the one or more target TRPs:

11. The power control method of claim 10, wherein the priority of the transmission content is inversely related to the probability that the TRP is determined to be the one or more target TRPs;

12. The power control method according to claim 10, wherein the following priority levels of transmission contents are sequentially lowered from high to low: HARQ-ACK, SRS, CSI.

13. The power control method according to claim 1, wherein after reducing the transmission power corresponding to the one or more target TRPs to a first threshold value, if the sum of the transmission powers corresponding to all the TRPs is not greater than the maximum transmission power, stopping the transmission of the uplink signal to the one or more target TRPs.

14. The power control method of claim 1, wherein the uplink signal is a signal transmitted on PUSCH or PUCCH.

15. The power control method of claim 1, wherein the terminal has dynamic power sharing capability.

16. The power control method according to claim 1, wherein the determining the transmission power corresponding to each TRP comprises:

17. The power control method according to claim 16, wherein said determining the transmission power corresponding to each TRP according to the plurality of sets of power control parameters associated with the TCI state indicated by the network device comprises:

18. A method of power control, comprising:

19. The power control method according to claim 18, wherein the target power control parameter value is a maximum value of target power control parameter values corresponding to all TRPs;

20. The power control method according to claim 18, wherein the determining a transmission power corresponding to each TRP based on the total transmission power comprises:

21. The power control method according to claim 18, wherein the determining a transmission power corresponding to each TRP based on the total transmission power comprises:

22. A terminal comprising a memory, a transceiver, and a processor;

23. The terminal of claim 22, wherein the reducing the transmission power corresponding to the one or more target TRPs comprises:

24. The terminal of claim 23, wherein prior to the reducing the transmit power corresponding to the one or more target TRPs based on the predetermined reduction factor, further comprising:

the reduction factor is determined based on the first configuration message.

25. The terminal of claim 23, wherein prior to the reducing the transmit power corresponding to the one or more target TRPs based on the predetermined reduction factor, further comprising:

26. The terminal of claim 25, wherein the determining the reduction factor based on the relationship between the sum of the transmission powers corresponding to all TRPs and the maximum transmission power comprises:

alternatively, it includes:

27. The terminal of claim 22, further comprising, prior to said reducing the transmit power corresponding to the one or more target TRPs:

28. The terminal of claim 27, wherein the one or more target TRPs are one or more TRPs that are ranked first after all TRPs are ranked in order of corresponding path loss from higher to lower;

29. The terminal of claim 22, further comprising, prior to said reducing the transmit power corresponding to the one or more target TRPs:

30. The terminal of claim 29, wherein the determining the one or more target TRPs based on the power control parameter for each TRP comprises:

31. The terminal of claim 22, further comprising, prior to said reducing the transmit power corresponding to the one or more target TRPs:

32. The terminal of claim 31, wherein the priority of the transmission content is inversely related to the probability that the TRP is determined to be the one or more target TRPs;

33. The terminal of claim 31, wherein the following priority levels of transmission contents decrease in order from high to low: HARQ-ACK, SRS, CSI.

34. The terminal of claim 22, wherein after reducing the transmission power corresponding to the one or more target TRPs to the first threshold value, if the sum of the transmission powers corresponding to all TRPs is not greater than the maximum transmission power, ceasing to transmit the uplink signal to the one or more target TRPs.

35. The terminal of claim 22, wherein the uplink signal is a signal transmitted on PUSCH or PUCCH.

36. The terminal of claim 22, wherein the terminal has dynamic power sharing capabilities.

37. The terminal of claim 22, wherein the determining the transmit power corresponding to each TRP comprises:

38. The terminal of claim 37, wherein the determining the transmit power corresponding to each TRP based on the plurality of sets of power control parameters associated with the TCI state indicated by the network device comprises:

39. A terminal comprising a memory, a transceiver, and a processor;

40. The terminal of claim 39, wherein the target power control parameter value is a maximum of target power control parameter values corresponding to all TRPs;

41. The terminal of claim 39, wherein the determining the transmit power for each TRP based on the total transmit power comprises:

42. The terminal of claim 39, wherein the determining the transmit power for each TRP based on the total transmit power comprises:

43. A power control apparatus, comprising:

44. A power control apparatus, comprising:

45. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for causing a computer to execute the power control method according to any one of claims 1 to 17.

46. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for causing a computer to execute the power control method according to any one of claims 18 to 21.