CN112399539B

CN112399539B - Power control method and device

Info

Publication number: CN112399539B
Application number: CN201910760492.7A
Authority: CN
Inventors: 刘哲; 余政; 张兴炜; 吕永霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2022-08-26
Anticipated expiration: 2039-08-16
Also published as: WO2021031996A1; CN112399539A

Abstract

Methods and apparatus for power control are provided. In the technical scheme of the application, when out-of-order transmission occurs in two uplink channels, the two uplink channels can adopt different closed-loop power control processes to perform power control, and the power control performance is improved. For example, the second downlink channel is received by the terminal device before the first downlink channel, but the second uplink channel corresponding to the second downlink channel is transmitted by the terminal device after the first uplink channel corresponding to the first downlink channel. At this time, the second uplink channel and the first uplink channel are out-of-order transmission, and correspondingly, the first uplink channel may use the first closed-loop power control process to perform power control, and the second uplink channel may use the second closed-loop power control to perform power control. The downlink channel may be a PDCCH, and the uplink channel may be a PUSCH; or, the downlink channel is PDSCH, and the uplink channel is PUCCH carrying HARQ-ACK.

Description

Power control method and device

Technical Field

The present application relates to the field of communications, and more particularly, to power control methods and apparatus.

Background

In the 5th generation mobile communication (the 5) ^th generation, 5G) new radio interface (NR), ultra-reliable and low-latency communications (URLLC) is an application scenario that needs to be supported. Some new scenarios are introduced in the discussion of URLLC, one of which is to allow out of order (out of order) scheduling or out of order feedback. Out-of-order scheduling refers to that a first Physical Downlink Control Channel (PDCCH) is transmitted after a second PDCCH, but a first Physical Uplink Shared Channel (PUSCH) scheduled by the first PDCCH is transmitted after the second PDCCHThe PUSCH is transmitted before. The out-of-order feedback refers to that a first Physical Downlink Shared Channel (PDSCH) is transmitted after a second PDSCH, but a first Physical Uplink Control Channel (PUCCH) carrying hybrid automatic repeat request-acknowledgement (HARQ-ACK) information of the first PDSCH is fed back before a second PUCCH carrying HARQ-ACK information of the second PDSCH. In the present application, the out-of-order scheduling scenario and the out-of-order feedback scenario are simply referred to as an out-of-order scenario.

In an existing mechanism for performing closed-loop Transmit Power Control (TPC) by using transmit power control, a closed-loop transmit power of an uplink channel sent last time is used to determine a power adjustment value for closed-loop power control of the uplink channel sent this time, and after out-of-order scheduling or out-of-order feedback is introduced, a terminal device cannot calculate the closed-loop transmit power of the closed-loop power control according to a method in the prior art. Therefore, for the out-of-order scenario, the existing power control mechanism for the uplink channel is no longer applicable.

Disclosure of Invention

The application provides a power control method and device, which can realize power control of an uplink channel aiming at an out-of-order scene.

In a first aspect, a method of power control is provided. The execution subject of the method can be the terminal device, and can also be a module (e.g., a chip) applied to the terminal device. The following description will be made taking an execution subject as a terminal device as an example. The method comprises the following steps: the terminal equipment receives a first downlink channel from the network equipment on a first time domain resource; the terminal equipment sends a first uplink channel to the network equipment on a second time domain resource, wherein the first uplink channel corresponds to the first downlink channel; the first uplink channel belongs to a first closed-loop power control process, the second uplink channel belongs to a second closed-loop power control process, the second uplink channel is an uplink channel corresponding to a second downlink channel, the second uplink channel is sent after the second time domain resource, and the second downlink channel is received before the first time domain resource.

The first uplink channel and the second uplink channel are two uplink channels in a disorder scene, and correspondingly, the first closed-loop power control process and the second closed-loop power control process may be different closed-loop power control processes.

In the above technical solution, it is supported that a closed-loop power control process is respectively configured for a first uplink channel and a second uplink channel. Therefore, the terminal equipment can accumulate the closed-loop transmitting power according to the closed-loop power control processes of the first uplink channel and the second uplink channel, and a scheme for controlling the power of the uplink channel in the disorder scene is provided.

In a possible implementation manner, the terminal device determines a first closed-loop transmission power of the first uplink channel according to an adjustment factor and power adjustment information, where the power adjustment information is used to indicate a closed-loop transmission power adjustment value of the first uplink channel; and the terminal equipment sends the first uplink channel according to the first closed loop transmitting power.

In the technical scheme, the adjustment factor is added to improve the climbing speed of the closed-loop transmitting power of the uplink channel in the disorder scene, and improve the reliability of the uplink channel in the disorder scene.

In one possible implementation, the adjustment factor is protocol-predefined; or, the adjustment factor is configured to the terminal device by the network device through signaling.

In one possible implementation, the accumulated value of the closed-loop transmit power of the first closed-loop power control procedure is valid for a target duration.

In a possible implementation manner, when the target duration is exceeded, the terminal device sets the accumulated value of the closed-loop transmission power of the first closed-loop power control process to zero.

In one possible implementation, the target duration is predefined by a protocol; or the target duration is configured to the terminal device by the network device through signaling.

Alternatively, the target duration may be implemented by a timer, and the duration of the target duration is equal to the timing duration of the timer. The timer can be predefined by a protocol, and can also be flexibly configured to the terminal device by the network device through signaling.

In a possible implementation manner, the first downlink channel is a first PDSCH, the second downlink channel is a second PDSCH, the first uplink channel is a first PUCCH, and the second uplink channel is a second PUCCH. The first PUCCH is used for bearing HARQ-ACK information of the first PDSCH, and the second PUCCH is used for bearing HARQ-ACK information of the second PDSCH.

In a possible implementation manner, the first downlink channel is a first PDCCH, the second downlink channel is a second PDCCH, the first uplink channel is a first PUSCH, and the second uplink channel is a second PUSCH. The first PUSCH is scheduled through Downlink Control Information (DCI) in the first PDCCH, and the second PUSCH is scheduled through DCI in the second PDCCH.

In a possible implementation manner, the first downlink channel is a first PDSCH, the second downlink channel is a second PDSCH, the first uplink channel is a first PUSCH, and the second uplink channel is a second PUSCH. The first PUSCH is used for bearing HARQ-ACK information of the first PDSCH, and the second PUSCH is used for bearing HARQ-ACK information of the second PDSCH.

In a possible implementation manner, the first downlink channel is a first PDCCH, the second downlink channel is a second PDCCH, the first uplink channel is a first PUCCH, and the second uplink channel is a second PUCCH. The first PUCCH is used for carrying CSI triggered by the first PDCCH; the second PUCCH is used to carry CSI triggered by the second PDCCH.

In a possible implementation manner, the first downlink channel is a first PDCCH, the second downlink channel is a second PDCCH, the first uplink channel is a Sounding Reference Signal (SRS), and the second uplink channel is a second SRS. Wherein the first SRS is triggered by DCI carried in the first PDCCH; the second SRS is triggered by DCI carried in the second PDCCH.

In a possible implementation manner, after a terminal device sends a first uplink channel to a network device, the terminal device sends an Sounding Reference Signal (SRS) to the network device according to a second closed-loop transmission power, where the second closed-loop transmission power is a closed-loop transmission power of a target uplink channel; the target uplink channel is a third uplink channel, the third uplink channel is sent before the first uplink channel, and a third downlink channel corresponding to the third uplink channel is received before the second downlink channel.

In a possible implementation manner, after a terminal device sends a first uplink channel to a network device, the terminal device sends an Sounding Reference Signal (SRS) to the network device according to a second closed-loop transmission power, where the second closed-loop transmission power is a closed-loop transmission power of a target uplink channel; the target uplink channel is an uplink channel with a priority value of a first preset value in the first uplink channel, the second uplink channel and a third uplink channel, the third uplink channel is sent before the first uplink channel, and a third downlink channel corresponding to the third uplink channel is received before the second downlink channel.

For URLLC traffic or higher priority traffic, since the data transmission delay may be required to be short, it may be required that its data is transmitted urgently, as in the first PUCCH and the first PUSCH in the background art. In order to make the first PUCCH or the first PUSCH received by the network device faster and more reliable, the first PUCCH and the first PUSCH may be transmitted with a higher closed loop transmit power. When the closed loop transmission power of the SRS is configured to be associated with the closed loop transmission power of the PUSCH, if the PUSCH transmitted recently before the SRS is the first PUSCH in the background art, the SRS transmission power may be too high, and interference may be caused to the neighboring cell. For the problem, in the technical scheme, the closed-loop transmission power of the SRS is only associated with the closed-loop transmission power of the third PUSCH and is not associated with the closed-loop transmission power of the first PUSCH, so that the interference of the SRS on the adjacent cell can be reduced.

In one possible implementation, when the SRS is transmitted after the first uplink channel and before the second uplink channel, the closed loop transmission power of the SRS is associated with a previous closed loop transmission power of the SRS; or, the closed-loop transmission power of the SRS is associated with the previous SRS closed-loop transmission power of the same SRS process; or the closed loop transmitting power of the SRS is a second preset value.

Alternatively, the second preset value may be a closed-loop transmit power adjustment value, i.e., an absolute closed-loop transmit power value, indicated by the network device through a TPC command in the DCI.

In the above technical solution, when the PUSCH most recently transmitted before the SRS is the first PUSCH in the background art, the closed loop transmission power of the SRS is associated with the previous SRS closed loop transmission power, or associated with the previous SRS closed loop transmission power of the same SRS process, or a preset closed loop transmission power is adopted, so that the association with the closed loop transmission power of the first PUSCH is avoided, and thus the interference of the SRS on the neighboring cell can be reduced.

In a second aspect, the present application provides a method of power control. The execution subject of the method may be a network device, and may also be a module (e.g., a chip) applied to the network device. The following description takes an execution subject as a network device as an example. The method comprises the following steps: the network equipment sends a first downlink channel to the terminal equipment on a first time domain resource; the network equipment receives a first uplink channel from the terminal equipment on a second time domain resource, wherein the first uplink channel corresponds to the first downlink channel; the first uplink channel belongs to a first closed-loop power control process, the second uplink channel belongs to a second closed-loop power control process, the second uplink channel is an uplink channel corresponding to a second downlink channel, the second uplink channel is received after the second time domain resource, and the second downlink channel is sent before the first time domain resource.

In a possible implementation manner, the closed-loop transmission power of the first uplink channel is determined according to an adjustment factor and power adjustment information, and the power adjustment information is used for indicating a closed-loop transmission power adjustment value of the first uplink channel.

In a possible implementation manner, after a network device receives a first uplink channel from the terminal device on a second time domain resource, the network device receives an Sounding Reference Signal (SRS) from the terminal device, and a closed-loop transmission power of the SRS is determined according to a closed-loop transmission power of a target uplink channel; the target uplink channel is a third uplink channel, the third uplink channel is received before the first uplink channel, and a third downlink channel corresponding to the third uplink channel is transmitted before the second downlink channel.

In a possible implementation manner, after receiving a first uplink channel from the terminal device, the network device receives an Sounding Reference Signal (SRS) from the terminal device, wherein the closed-loop transmission power of the SRS is determined according to the closed-loop transmission power of a target uplink channel; the target uplink channel is an uplink channel with a priority value of a first preset value in the first uplink channel, the second uplink channel and the third uplink channel, the third uplink channel is received before the first uplink channel, and a third downlink channel corresponding to the third uplink channel is sent before the second downlink channel.

Since the second aspect is a method on the network side corresponding to the first aspect, a more detailed implementation manner of the second aspect may refer to the first aspect, and beneficial effects of the second aspect may also refer to the first aspect, which is not described herein again.

In a third aspect, a method for power control is provided. The execution subject of the method can be the terminal device, and can also be a module (e.g., a chip) applied to the terminal device. The following description will be given taking the execution subject as a terminal device as an example. The method comprises the following steps: a terminal device receives first information and second information from a network device, wherein the first information is used for indicating the number M of information blocks corresponding to the terminal device and included in group common downlink control information, the second information is used for indicating the positions of the M information blocks corresponding to the terminal device in the group common downlink control information, each of the M information blocks is used for indicating a transmission power adjustment value of a closed-loop power control process of the terminal device, and M is an integer greater than 1; and the terminal equipment determines the transmitting power adjustment quantity of the M closed-loop power control processes of the terminal equipment according to the first information and the second information.

Alternatively, the group common downlink control information may be DCI format 2-2(DCI format 2-2).

At present, a group common downlink control information only includes an information block of a closed-loop power control process of a terminal device, so when 2 or more closed-loop power control processes configured for the terminal device all need to adjust closed-loop transmission power, 2 or more group common downlink control information are needed to complete an indication, resulting in a large overhead of the group common downlink control information. In view of the problem, the above technical solution realizes transmission of multiple information blocks of one terminal device in one group common downlink control information by informing the terminal device of the number and position of the group common downlink control information and the corresponding information blocks, so that the overhead of the group common downlink control information can be reduced.

In a possible implementation manner, the first information and the second information are carried in a higher layer signaling.

In a possible implementation manner, the first information is carried in the group of common downlink control information, and the second information is carried in a higher layer signaling.

Compared with the first information and the second information both carried in the high-level signaling, the flexibility of information block transmission can be improved by indicating the number M through the group common downlink control information.

In one possible implementation, the information block includes a transmit power adjustment amount.

In a possible implementation manner, the information block further includes a closed-loop power control progress indication corresponding to the information block.

In a possible implementation manner, the M information blocks are respectively used to indicate power adjustment values of M closed-loop power control processes of the terminal device; or, the M information blocks are respectively used to instruct the terminal device to perform a power adjustment value for M times of uplink transmissions in the time domain.

In a fourth aspect, the present application provides a method for power control. The execution subject of the method can be a network device, and can also be a module (e.g. a chip) applied to the network device. The following description will be given taking an execution subject as a network device as an example. The method comprises the following steps: the method comprises the steps that a network device determines first information and second information, wherein the first information is used for indicating the number M of information blocks corresponding to a terminal device and included in group public downlink control information, the second information is used for indicating the positions of the M information blocks corresponding to the terminal device in the group public downlink control information, each of the M information blocks is used for indicating a transmitting power adjustment value of a closed-loop power control process of the terminal device, and M is a positive integer larger than 1; the network device sends the first information and the second information to the terminal device.

Since the fourth aspect is a method on the network side corresponding to the third aspect, for a more detailed implementation of the fourth aspect, the third aspect may be referred to, and beneficial effects of the fourth aspect may also be referred to the third aspect, which is not described herein again.

In a fifth aspect, the present application provides a communications apparatus comprising means for performing the first aspect or any one of the implementations of the first aspect; or means for performing the third aspect or any one of the implementation manners of the third aspect.

In a possible implementation manner, the communication device includes a processor, which is connected to a memory and configured to read and execute a software program stored in the memory to implement the method according to the first aspect or any one of the implementation manners of the first aspect, or to implement the method according to any one of the implementation manners of the third aspect or any one of the implementation manners of the third aspect.

In one possible implementation, the communication device further includes a transceiver.

In one possible implementation, the communication device is a chip that can be applied to a terminal device.

In one possible implementation, the communication device is a terminal device.

In a sixth aspect, the present application provides a communication apparatus, including means for performing the second aspect or any one of the implementation manners of the second aspect; or, means for performing the fourth aspect or any one of the implementation manners of the fourth aspect are included.

In a possible implementation manner, the communication device includes a processor, which is connected to a memory and is configured to read and execute a software program stored in the memory to implement the method according to the second aspect or any one of the implementation manners of the second aspect, or to implement the method according to any one of the implementation manners of the fourth aspect or any one of the implementation manners of the fourth aspect.

In one possible implementation, the communication device is a chip that can be applied to a network device.

In one possible implementation, the communication device is a network device.

In a seventh aspect, the present application provides a computer program product comprising computer instructions that, when executed, cause a method in the foregoing first aspect or any possible implementation manner of the first aspect to be performed, or cause a method in the foregoing second aspect or any possible implementation manner of the second aspect to be performed, or cause a method in the foregoing third aspect or any possible implementation manner of the third aspect to be performed, or cause a method in the foregoing fourth aspect or any possible implementation manner of the fourth aspect to be performed.

In an eighth aspect, the present application provides a computer-readable storage medium storing computer instructions that, when executed, cause a method in the foregoing first aspect or any possible implementation manner of the first aspect to be performed, or cause a method in the foregoing second aspect or any possible implementation manner of the second aspect to be performed, or cause a method in the foregoing third aspect or any possible implementation manner of the third aspect to be performed, or cause a method in the foregoing fourth aspect or any possible implementation manner of the fourth aspect to be performed.

In a ninth aspect, the present application provides a communication system comprising the communication apparatus of the fifth aspect and the communication apparatus of the sixth aspect.

Drawings

Fig. 1 is a schematic architecture diagram of a mobile communication system suitable for use in an embodiment of the present application.

Fig. 2 is a diagram of uplink channel transmission in a sequential scenario.

Fig. 3 is a schematic diagram of uplink channel transmission in an out-of-order scenario.

Fig. 4 is a schematic diagram of closed loop transmit power accumulation of an uplink channel in an out-of-order scenario.

Fig. 5 is a schematic flow chart of a method for power control provided in an embodiment of the present application.

Fig. 6 is a schematic diagram of uplink channel transmission in an out-of-order scenario according to an embodiment of the present application.

Fig. 7 is a schematic diagram of uplink channel transmission in an out-of-order scenario according to another embodiment of the present application.

Fig. 8 is a schematic diagram of SRS transmission according to an embodiment of the present application.

Fig. 9 is a diagram illustrating SRS transmission according to another embodiment of the present application.

Fig. 10 is a schematic flow chart of a method for power control according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a power control apparatus according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a power control apparatus according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, a New Radio (NR) in a 5th Generation (5G) mobile communication system of an LTE Time Division Duplex (TDD), a future mobile communication system, and the like.

Fig. 1 is a schematic architecture diagram of a mobile communication system suitable for use in an embodiment of the present application. As shown in fig. 1, the mobile communication system includes a core network device 110, a radio access network device 120, and at least one terminal device (e.g., a terminal device 130 and a terminal device 140 in fig. 1). The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or the function of the core network device and the logical function of the radio access network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the radio access network device. The terminal equipment may be fixed or mobile. Fig. 1 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, radio access network devices, and terminal devices included in the mobile communication system.

The radio access network device in the embodiment of the present application is an access device in which a terminal device accesses to the mobile communication system in a wireless manner, and may be a base station (base station), an evolved NodeB (eNodeB), a Transmission Reception Point (TRP), a next generation base station (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, and the like; the present invention may also be a module or a unit that performs part of the functions of the base station, and for example, the module may be a Centralized Unit (CU) or a Distributed Unit (DU). The embodiments of the present application do not limit the specific technologies and the specific device forms adopted by the radio access network device. In this application, a radio access network device is referred to as a network device for short, and if no special description is provided, the network device refers to a radio access network device.

The terminal device in the embodiment of the present application may also be referred to as a terminal, a User Equipment (UE), a mobile station, a mobile terminal, and the like. The terminal device can be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote operation, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home and the like. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons and satellite vehicles. The embodiment of the application does not limit the application scenarios of the network device and the terminal device.

The network device and the terminal device can communicate through the authorized spectrum, can communicate through the unlicensed spectrum, and can communicate through both the authorized spectrum and the unlicensed spectrum. The network device and the terminal device may communicate with each other through a frequency spectrum of 6 gigahertz (GHz) or less, through a frequency spectrum of 6GHz or more, or through both a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

It can be understood that, in the embodiment of the present application, the PDSCH, the PDCCH, the PUSCH, and the PUCCH are only used as an example of the downlink data channel, the downlink control channel, the uplink data channel, and the uplink control channel, and in different systems and different scenarios, the data channel and the control channel may have different names, which is not limited in the embodiment of the present application.

In the current protocol of R15, there is only a sequential scenario for scheduling and transmission of PUSCH, PUCCH, and SRS channels, for example, if DCI transmission time is early, PUSCH transmission time scheduled by the DCI is early, or PDSCH transmission time is early, PUCCH transmission time corresponding to the PDSCH is early. Taking DCI scheduled PUSCH as an example, as shown in fig. 2, DCI3 scheduled PUSCH3 would not be transmitted before DCI2 scheduled PUSCH2, and DCI2 scheduled PUSCH2 would not be transmitted before DCI1 scheduled PUSCH 1. In this scenario, uplink power control of PUSCH, PUCCH, and SRS is as follows.

1) Power control of PUSCH:

the power control of the PUSCH comprises an open loop transmission power control part and a closed loop transmission power control part. Specifically, it can be calculated according to the following formula (1):

wherein i is a transmission opportunity (transmission opportunity) index, j is an index of a power control parameter set, l is a closed-loop power control process index or a closed-loop power control process number, and q is _d Indexing a Reference Signal (RS) for path loss measurement, b an active bandwidth part (BWP), f an uplink carrier in a cell (cell), c a cell, P _{PUSCH，b，f，c} (i，j，q _d L) is the transmit power of the PUSCH, P _CMAX，f，c (i) Is the maximum transmit power selected by the terminal device, among the upper and lower limits of the maximum transmit power allowed,

resource size (number of Resource Blocks (RBs)) allocated for PUSCH for serving cell c, carrier f, active BWP b transmission opportunity i, PL _b，f，c (q _d ) Is the downlink path loss, P, measured by the terminal device through the reference signal with index qd _{O_PUSCH，b，f，c} (i) For the power control parameters, α, including cell level and terminal equipment level _b，f，c (j) As a path loss compensation factor, Δ _{TF，b，f，c} (i) Are parameters related to a Modulation and Coding Scheme (MCS). Wherein, P _{O_PUSCH，b，f，c} (i)、α _b，f，c (j)、PL _b，f，c (q _d ) For open-loop power control parameters, f _b，f，c And (i, l) is a closed-loop power control parameter.

When closed-loop power control is performed, different closed-loop power control processes are considered separately, for example, the accumulated TPC and the absolute TPC are calculated independently for different closed-loop power control processes. The closed-loop power control process can be identified by a closed-loop power control process index, a closed-loop power control process number and the like, if the closed-loop power control process index or the closed-loop power control process number is the same, the closed-loop power control process index or the closed-loop power control process number belongs to the same closed-loop power control process, and if the closed-loop power control process index or the closed-loop power control process number is different, the closed-loop power control process index or the closed-loop power control process number is different.

There are two types of closed loop power control, cumulative TPC and absolute TPC. As shown in fig. 4, if the TPCs carried in the scheduling DCI corresponding to PUSCH1, PUSCH2, and PUSCH3 are TPC1, TPC2, and TPC3, respectively, the accumulated TPC of PUSCH2 is f2 — TPC1+ TPC2, and the accumulated TPC of PUSCH3 is f3 — f2+ TPC 3.

2) The power control method of PUccH is similar to that of PUSCH, and is not described herein again.

3) Power control of SRS:

mode 1: the transmission power of the SRS may be calculated according to the following formula (2).

Wherein i is a transmission opportunity index, l is a closed-loop power control process index or a closed-loop power control process number, and q _s Is the index of SRS resource set, b is activated BWP, f is a certain uplink carrier in the cell, c is the cell, P _{SRS，b，f，c} (i，q _s L) maximum transmission power, P, configured by the terminal device _CMAX，f，c (i) Is the maximum transmit power, M, selected by the terminal device among the upper and lower limits of the maximum transmit power allowed _{SRS，b，f，c} (i) Allocated for SRS for transmission opportunity i within serving cell c, carrier f, active BWP bResource size (RB number), PL _b，f，c (q _s ) Is the downlink path loss, P, calculated by the terminal device by the reference signal index for path loss measurement _{O_SRS，b，f，c} (q _s ) For power control parameters including cell level and terminal equipment level, α _{SRS，b，f，c} (q _s ) Is a path loss compensation factor. Wherein, P _{O_SRS，b，f，c} (q _s )、α _{SRS，b，f，c} (q _s )、PL _b，f，c (q _d ) For open-loop power control parameters, h _b，f，c And (i, l) is a closed-loop power control parameter.

Mode 2: the closed loop transmit power of the SRS may also be correlated to the closed loop transmit power of the PUSCH.

According to the current protocol, when the closed-loop transmission power of the SRS is configured to be associated with the closed-loop transmission power of the PUSCH, the closed-loop transmission power of the SRS is associated with a PUSCH which is before and recently transmitted by the SRS, that is, the closed-loop transmission power of the SRS is equal to the closed-loop transmission power of the recently transmitted PUSCH, that is, h _b，f，c (i，l)＝f _b，f，c (i，l)。

For convenience of description, channels for transmitting uplink information, such as PUccH, PUSCH, and SRS channels, are collectively referred to as an uplink channel, and channels for transmitting downlink information, such as PDCCH and PDSCH, are collectively referred to as a downlink channel.

An out-of-order scenario is introduced in the standard discussion of URLLC, which is a scenario of out-of-order scheduling, as shown in fig. 3.

In the out-of-order scenario, for the closed-loop power control part of the uplink channel, there are two ways, i.e., way 1 and way 2, for the accumulation of the closed-loop transmit power of the same closed-loop power control process as shown in fig. 4.

Mode 1: accumulation according to the order of DCI transmission

f1＝TPC1；

f2＝f1+TPC2；

f3＝f2+TPC3；

f4＝f1+TPC2+TPC3+TPC4。

Mode 2: accumulation in order of PUSCH transmission

f1＝TPC1；

f2＝f1+TPC2；

f3＝f2+TPC3；

f4＝f1+TPC4。

In the two manners, compared with the accumulation of closed-loop transmission power of PUSCH in a sequential scenario, the terminal device needs to store TPC1 all the time, because the TPC1 is still needed for subsequent determination of closed-loop transmission power of PUSCH2 and PUSCH4, and more buffers are occupied by the terminal device, which results in that the existing power control mechanism for the uplink channel is no longer applicable.

In order to solve the above problem, the present application provides a power control method, which can implement power control of an uplink channel in a disordered scenario.

Fig. 5 is a schematic flow chart of a method for power control provided by an embodiment of the present application. The method in fig. 5 may be used for a terminal device and a network device in the wireless communication system shown in fig. 1. In the embodiments of the present application, a terminal device and a network device are taken as examples for explanation, it should be understood that the execution subject may also be a chip applied to the terminal device and a chip applied to the network device, and the embodiments of the present application are not specifically limited.

At 510, the network device transmits a first downlink channel to the terminal device on a first time domain resource. Correspondingly, the terminal device receives the first downlink channel from the network device on the first time domain resource.

In 520, the terminal device sends the first uplink channel to the network device on the second time domain resource. Correspondingly, the network device receives the first uplink channel from the network device on the second time domain resource. The first uplink channel corresponds to the first downlink channel, and the correspondence may be between a PDCCH and a PUSCH scheduled by the PDCCH, between a PUCCH or a PUSCH carrying HARQ-ACK information of a PDSCH and the PDSCH, between a PUCCH or a PUSCH carrying CSI triggered by the PDCCH and the PDCCH, or between an SRS triggered by the PDCCH and the PDCCH. The first uplink channel belongs to the first closed-loop power control process, the second uplink channel belongs to the second closed-loop power control process, the second uplink channel is an uplink channel corresponding to the second downlink channel, the second uplink channel is sent after the second time domain resource, and the second downlink channel is received before the first time domain resource.

There is at least one second uplink channel transmitted after the second time domain resource, at least one second downlink channel received before the first time domain resource, the at least one second uplink channel corresponding to the at least one second downlink channel. For example, the first uplink channel may be PUSCH4 as shown in fig. 4, and the second uplink channel may be PUSCH2 and PUSCH3 as shown in fig. 4.

In the present application, the time domain resource may be a resource composed of one or more time units, and the time units in the present application may be superframes, frames, subframes, slots, symbols, and the like. In this application, if not specifically stated, the symbols all refer to time domain symbols, and the time domain symbols may be Orthogonal Frequency Division Multiplexing (OFDM) symbols or Discrete Fourier Transform spread-spectrum-OFDM (DFT-s-OFDM) symbols.

The first uplink channel and the first downlink channel are described in detail below.

As an example, the first downlink channel schedules a first uplink channel, specifically, the first downlink channel is a first PDCCH, and the first uplink channel is a first PUSCH, where DCI in the first PDCCH schedules a first PUSCH.

As another example, the first downlink channel triggers the first uplink channel. Specifically, the first downlink channel is a first PDScH, and the first uplink channel is a first PUCCH, where the first PUCCH is used to carry HARQ-ACK information of the first PDScH, and the HARQ-ACK information is an Acknowledgement (ACK) indicating that the PDScH is correctly decoded or a negative acknowledgement (NAcK) indicating that the PDScH is not correctly decoded; the first downlink channel is a first PDSCH, the first uplink channel is a first PUSCH, and the first PUSCH is used for bearing HARQ-ACK information of the first PDSCH; the first downlink channel is a first PDCCH, and the first uplink channel is a first PUCCH, where the first PUCCH is used to carry Channel State Information (CSI), and the CSI is triggered by the first PDCCH; the first downlink channel is a first PDCCH, and the first uplink channel is a first sounding reference signal.

The correspondence between the second uplink channel and the second downlink channel may directly refer to the correspondence between the first uplink channel and the first downlink channel, which is not described herein.

The following describes the scheme of the embodiment of the present application by taking the first downlink channel as the first PDCCH, the first uplink channel as the first PUSCH, the second downlink channel as the second PDCCH, and the second uplink channel as the second PUSCH as an example.

In this embodiment, the first closed-loop power control process and the second closed-loop power control process may be the same or different.

In some cases, the fourth PUScH is sent after the second PUScH, but the fourth PDCCH corresponding to the fourth PUScH is received by the terminal device before the second PDCCH, and at this time, the first closed-loop power control process and the second closed-loop power control process may be the same or different.

In another case, the second PUSCH is a PUSCH in a sequential scenario, that is, the DCI corresponding to the PUSCH transmitted before the second PUSCH is transmitted before the second DCI. At this time, the first closed-loop power control process and the second closed-loop power control process may be different.

It can be understood that, when the DCI corresponding to the PUSCH transmitted before the second PUSCH is transmitted before the second DCI, the first closed loop power control process and the second closed loop power control process may also be the same closed loop power control process.

For the case that the first closed-loop power control process and the second closed-loop power control process are different closed-loop power control processes, in a possible implementation manner, the closed-loop power control of the first PUSCH is configured as an independent closed-loop power control process. That is, the first PUSCH and the second PUSCH use different closed loop power control processes, so that the closed loop transmission power of the first PUSCH and the second PUSCH does not affect each other when TPC accumulation is performed. As shown in fig. 6, the closed-loop power control process of the PUSCH3 is configured as a closed-loop power control process 2, the closed-loop power controls of the PUSCH1, the PUSCH2, and the PUSCH4 are configured as a closed-loop power control process 1, and only the PUSCH belonging to the same closed-loop power control process performs TPC accumulation. For the out-of-order feedback, a similar processing manner to the out-of-order scheduling processing manner may be adopted, for example, as shown in fig. 7, the closed loop power control processes of PUCCH3 and PUSCH5 are configured as a closed loop power control process 2, and the closed loop power control processes of PUCCH1, PUCCH2 and PUCCH4 are configured as a closed loop power control process 1.

In general, the first PUSCH is used to carry information that the network device needs emergency scheduling, and may correspond to a higher priority, or the requirement on the delay is strict, and the occurrence probability of the first PUSCH may be lower than that of the second PUSCH. Therefore, the embodiment of the application can improve the ramp-up speed of the closed-loop transmission power of the first PUSCH by configuring or predefining an adjustment factor. For example, adding (TPC value + adjustment factor) or multiplying (TPC value x adjustment factor) an adjustment factor on the basis of the TPC value indicated by the TPC field in the DCI; the TPC value and the adjustment factor may also be in a linear functional relationship (TPC value x adjustment factor + x db), where x may be a positive number, a negative number, 0, or an exponential; the TPC value and the adjustment factor may also be in an exponential functional relationship (the power of N of the TPC value, N being the adjustment factor) or a nonlinear functional relationship. In other words, the first PUSCH is determined according to the adjustment factor and the closed loop transmit power adjustment value indicated by the network device through the TPC field of the DCI. Alternatively, the adjustment factor may be a constant, linear or non-linear function, or the like. The adjustment factor may be predefined in a protocol, or configured by a network device through Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, or dynamically indicated through System Information Block (SIB) or DCI through physical layer signaling, or associated with a traffic type or a priority of an uplink channel, for example, if the priority of the uplink channel is higher, the adjustment factor takes a larger value.

Meanwhile, in this embodiment of the present application, a target duration may also be set for the first closed-loop power control process of the first PUSCH, the accumulated value of the closed-loop transmit power of the first closed-loop power control process is only valid within the target duration, and when the target duration is exceeded, the terminal device sets the accumulated value of the closed-loop transmit power of the first closed-loop power control process to zero, and releases the first closed-loop power control process. In this way, the occupation of the accumulated value of the closed-loop power control process to the buffer of the terminal device may be further reduced, and the target duration may be predefined in a protocol, or configured by the network device through RRC signaling, MAC signaling, or dynamically indicated through SIB or DCI through physical layer signaling.

Optionally, a timer may be set, and the duration of the target duration is equal to the timing duration of the timer. Specifically, when the timer times out, the terminal device sets the closed-loop transmission power accumulated value of the first closed-loop power control process to zero, and releases the first closed-loop power control process. The timer and/or the duration of the timer may be predefined in a protocol, may be configured by the network device through RRC signaling, MAC signaling, SIB, or may be dynamically indicated through physical layer signaling DCI.

In the out-of-order scenario, when the closed-loop transmission power of the SRS is configured to be associated with the closed-loop transmission power of the PUSCH, if the PUSCH closest to the SRS in the time domain is the first PUSCH as in the background art, the closed-loop transmission power of the SRS is associated with the closed-loop transmission power of the first PUSCH, that is, the closed-loop transmission power of the SRS is accumulated to the closed-loop transmission power of the first PUSCH. Since the first PUSCH is generally used for carrying URLLC traffic or traffic with higher priority, a higher closed loop transmission power may be used for transmission, which may cause the SRS transmission power to be too high, causing interference to the neighboring cell.

For the problem, in the embodiment of the present application, when performing the closed-loop transmission power accumulation value, the closed-loop transmission power of the SRS is not associated with the closed-loop transmission power of the first PUSCH in the background art, that is, the closed-loop transmission power of the SRS does not adopt the closed-loop transmission power of the first PUSCH, or the closed-loop transmission power of the SRS is not associated with the closed-loop transmission power of the first PUSCH, that is, the first PUSCH is excluded, so as to avoid interference of the SRS on the neighboring cell.

In one embodiment, the closed loop transmit power of the SRS is associated with a target uplink channel.

As an example, the target uplink channel is a third PUSCH, the third PUSCH is received by the network device before the first uplink channel, a third downlink channel corresponding to the third uplink channel is transmitted by the network device before the second downlink channel, and the closed-loop transmit power of the SRS is the closed-loop transmit power of the third PUSCH.

For example, as shown in fig. 8, PUSCH3 is the first PUSCH, PUSCH2 is the second PUSCH, PUSCH1 is the third PUSCH, and the closed loop transmission power of SRS is the closed loop transmission power of PUSCH 1.

Or, the terminal device associates the closed-loop transmission power of the SRS with the closed-loop transmission power of the third PUSCH, and further adjusts the closed-loop transmission power of the third PUSCH on the basis of the closed-loop transmission power of the third PUSCH to obtain the closed-loop transmission power of the SRS. For example, a linear function value of the first parameter and the closed-loop transmission power of the third PUSCH, or the first parameter and the closed-loop transmission power of the third PUSCH may be adopted as the closed-loop transmission power of the SRS, or the like. The first parameter may be predefined by a protocol, or indicated by RRC signaling, MAC signaling, SIB information, or physical layer signaling in a higher layer, or associated with a service type or a priority of an uplink channel, for example, if the priority of the uplink channel is higher, the adjustment factor takes a larger value.

As another example, the target uplink channel is a first PUSCH.

Specifically, the terminal device may use the closed-loop transmission power of the first PUSCH closest in the time domain to the SRS as the closed-loop transmission power of the SRS.

Or, the terminal device may associate the closed-loop transmission power of the SRS with the closest closed-loop transmission power of the first PUSCH in the time domain, and further adjust the closed-loop transmission power of the first PUSCH on the basis of the closed-loop transmission power of the first PUSCH to obtain the closed-loop transmission power of the SRS. For example, the closed loop transmission power of the SRS may be obtained by adding the second parameter to the closed loop transmission power of the first PUSCH, or by multiplying the second parameter by the closed loop transmission power of the first PUSCH, or by taking a linear function value of the second parameter and the closed loop transmission power of the first PUSCH. The second parameter may be predefined by a protocol, or indicated by RRC signaling, MAC signaling, SIB information, or physical layer signaling in a higher layer, or associated with a service type or a priority of the uplink channel, for example, if the priority of the uplink channel is higher, the adjustment factor takes a larger value.

As another example, the target uplink channel is an uplink channel whose priority value is a first preset value among the first uplink channel, the second uplink channel, and the third uplink channel, the third uplink channel is received before the first uplink channel, and the third downlink channel corresponding to the third uplink channel is transmitted before the second downlink channel.

Specifically, as shown in fig. 8, the target uplink channel is a PUSCH with a priority of a first preset value among

PUSCHs

1, 2, and 3. The first preset value may be a high priority, for example, a priority of the URLLC service; the first preset value may also be a low priority, for example, a priority of enhanced mobile bandwidth (eMBB) service, and the like.

Or, the terminal device associates the closed-loop transmission power of the SRS with the closed-loop transmission power of the PUSCH whose priority value is the first preset value, and further adjusts the closed-loop transmission power of the PUSCH on the basis of the closed-loop transmission power of the PUSCH to obtain the closed-loop transmission power of the SRS. For example, the closed-loop transmission power of the SRS may be obtained by adding the third parameter to the closed-loop transmission power of the PUSCH, or by multiplying the third parameter by the closed-loop transmission power of the PUSCH, or by using a linear function value of the third parameter and the closed-loop transmission power of the PUSCH. Wherein the third parameter may be predefined by a protocol, or indicated by higher layer signaling RRC signaling, MAC signaling, SIB information, or physical layer signaling, or associated with a service type.

In another embodiment, as shown in fig. 9, the SRS closed loop transmission power may not refer to the first PUSCH closed loop transmission power, but use the last SRS closed loop transmission power; or the terminal device may not refer to the closed-loop transmission power of the first PUSCH, but use the SRS closed-loop transmission power of the previous time of the same SRS process; or, the terminal device may ignore the first PUSCH and use the preset closed-loop transmit power as the closed-loop transmit power of the SRS, for example, the preset closed-loop transmit power may be an absolute closed-loop transmit power adjustment value, that is, the network device indicates, through the TPC field of the DCI, the closed-loop transmit power adjustment value of the SRS of the terminal device as the closed-loop transmit power of the SRS; or, the terminal device may configure the SRS to use an independent closed-loop power control process, that is, the closed-loop transmit power of the SRS is not associated with the closed-loop transmit power of any PUSCH, and the TPC value is independently accumulated and determined according to the SRS closed-loop transmit power of the previous time and the closed-loop transmit power adjustment value indicated by the DCI.

In another embodiment, as shown in fig. 9, the closed-loop transmission power of the SRS may not refer to the closed-loop transmission power of the first PUSCH, but be determined according to the SRS closed-loop transmission power transmitted last time and the fourth parameter, for example, the fourth parameter may be added to the closed-loop transmission power of the PUSCH, or the fourth parameter may be multiplied by the closed-loop transmission power of the PUSCH, or a linear function value of the fourth parameter and the closed-loop transmission power of the PUSCH may be used as the closed-loop transmission power of the SRS; or the terminal device may not refer to the closed-loop transmission power of the first PUSCH, but use the SRS closed-loop transmission power of the previous time of the same SRS process and the fifth parameter for determination, for example, the fifth parameter may be added to the closed-loop transmission power of the PUSCH, or the fifth parameter may be multiplied by the closed-loop transmission power of the PUSCH, or a linear function value of the fifth parameter and the closed-loop transmission power of the PUSCH may be used as the closed-loop transmission power of the SRS, and the like. Wherein the fourth parameter and the fifth parameter may be predefined by a protocol, or indicated by higher layer signaling RRC signaling, MAC signaling, SIB information, or physical layer signaling, or associated with a service type.

In another embodiment, if only the first PUSCH is transmitted without the third PUSCH within a time period of a preset length, or there is no PUSCH transmission with a priority value of the first preset value within the time period of the preset length, as shown in fig. 9, the terminal device may use the SRS closed loop transmission power of the previous transmission instead of referring to the closed loop transmission power of the first PUSCH; or the terminal device may not refer to the closed-loop transmission power of the first PUSCH, but use the SRS closed-loop transmission power of the previous time of the same SRS process; or, the terminal device may ignore the first PUSCH and use the preset closed-loop transmit power as the closed-loop transmit power of the SRS, for example, the preset closed-loop transmit power may be an absolute closed-loop transmit power adjustment value, that is, the network device indicates, through the TPC field of the DCI, the closed-loop transmit power adjustment value of the SRS of the terminal device as the closed-loop transmit power of the SRS; or, the terminal device may configure the SRS to use an independent closed-loop power control process, that is, the closed-loop transmit power of the SRS is not associated with the closed-loop transmit power of any PUSCH, and the TPC value is independently accumulated and determined according to the SRS closed-loop transmit power of the previous time and the closed-loop transmit power adjustment value indicated by the DCI. The time period with the preset length may be predefined in a protocol, may also be configured by the network device through RRC signaling, MAC signaling, SIB, or may be dynamically indicated through DCI signaling in a physical layer.

Alternatively, the time period of the preset length may be one or more time units.

After determining the closed-loop transmission power of the SRS, the terminal device may bring the closed-loop transmission power of the SRS into formula (2), where the closed-loop transmission power of the SRS corresponds to the closed-loop power control parameter h in formula (2) _b,f,c (i, l), obtaining the SRS transmission power according to the formula (2), and using the obtained transmission power to transmit the SRS by the terminal equipment.

When the first PUSCH and the second PUSCH in the out-of-order scenario adopt different closed-loop power control processes, the network device configures two closed-loop power control processes for the same terminal device, and the manner of indicating the TPC values of multiple closed-loop power control processes in the embodiment of the present application is described below.

One DCI may carry TPC values of a plurality of terminal devices. For example, DCI format 2-2(DCI format 2-2) may indicate a TPC value of one closed-loop power control process by 2 bits or 3 bits, and specifically, when the network device configures 1 closed-loop power control process for the terminal device, the TPC value is indicated by using 2 bits; when the network device configures 2 closed-loop power control processes for the terminal device, 3 bits are used to indicate the TPC value of one closed-loop power control process, where 1 bit is used to indicate the closed-loop power control process, such as a process number, and 2 bits are used to indicate the TPC value.

DCI format 2-2 includes multiple information blocks, each having an index, and one information block is 2 bits or 3 bits and is used to indicate a TPC value for a closed loop power control process. The terminal device determines the index of the information block belonging to the terminal device in the DCI through the high-layer signaling received from the network device. Each terminal device corresponds to one of the plurality of information blocks, and thus DCI format 2-2 may indicate TPC values for a plurality of terminal devices.

Because one DCI only includes an information block of one closed-loop power control process of one terminal device, when 2 closed-loop power control processes configured for the terminal device all need to adjust closed-loop transmission power, two DCIs (or 6 bits) are needed to complete indication, resulting in a large DCI overhead.

In the embodiment of the present application, a DCI may indicate a TPC value of at least one closed-loop power control process of a terminal device, so as to reduce DCI transmission times and reduce DCI resource overhead.

Fig. 10 is a schematic flow chart of a method for power control according to an embodiment of the present application. The method of fig. 10 may be used for a terminal device and a network device in the wireless communication system shown in fig. 1. In the embodiments of the present application, a terminal device and a network device are taken as examples for explanation, and it should be understood that the execution subject may also be a chip applied to the terminal device and a chip applied to the network device, and the embodiments of the present application are not particularly limited. The method of fig. 10 includes at least some of the following.

In 1010, a network device sends first information and second information to a terminal device, and the terminal device receives the first information and the second information, where the first information is used to indicate a number M of information blocks corresponding to the terminal device included in group common downlink control information, the second information is used to indicate a position of the information block corresponding to the terminal device in the group common downlink control information, and M is a positive integer greater than 1.

Alternatively, the position of the information block may be represented by an index of the information block, a start bit position, or the like.

Alternatively, the positions of the M information blocks may be determined by the position of the first information block and the number M of information blocks. For example, if the index of the first information block is k, then the indexes of the M information blocks are k, k +1, …, and k + M-1, respectively. For example, when M is 2 and k is 3, the 2 information blocks are information block 3 and information block 4, respectively.

Optionally, the second information may also indicate the position of each of the M information blocks.

In a possible implementation manner, the first information and the second information are both carried in higher layer signaling, for example, RRC signaling, MAC signaling, SIB, and the like. That is, the high layer signaling indicates the number and the position of the information blocks corresponding to the terminal device included in the common downlink control information of the terminal device group. At this time, one information block may include h +2 bits, where h bits are used to indicate a closed-loop power control process corresponding to the information block, 2 bits are used to indicate a TPC value, and h is greater than or equal to 1.

For example, when the terminal device is configured with 2 closed-loop power control processes, one information block includes 3 bits, 1 bit is used to indicate the closed-loop power control process corresponding to the information block, and 2 bits is used to indicate the TPC value.

Optionally, when M is equal to the number of closed-loop power control processes configured for the terminal device, the information block may not include bits for indicating the closed-loop power control processes, and the closed-loop power control processes corresponding to the information block may be in a predetermined manner. For example, the predetermined manner may be from small to large according to the process number, from large to small according to the process number, and the like, which are not limited in the embodiments of the present application. The information block may then comprise 2 bits for indicating the TPC value.

In another possible implementation manner, the first information is carried in the group common downlink control information, and the second information is carried in the higher layer signaling. That is to say, the group common downlink control information itself carries the number M of information blocks corresponding to a certain terminal device, and the positions of the M information blocks are still indicated by the high layer signaling.

At this time, the first information block of the M information blocks may include q + h +2 bits, wherein q bits are used to indicate the value of M, h bits are used to indicate a closed-loop power control process corresponding to the information block, 2 bits are used to indicate a TPC value, the remaining M-1 information blocks include h +2 bits, h bits are used to indicate a closed-loop power control process corresponding to the information block, 2 bits are used to indicate a TPC value, h is greater than or equal to 1, 2 ^q Greater than or equal to M.

For example, when the terminal device is configured with 2 closed-loop power control processes, where M is 1, the first information block includes 3 bits, 1 bit is used to indicate that M is 1, 1 bit is used to indicate the closed-loop power control process corresponding to the information block, 2 bits is used to indicate the TPC value, the remaining information blocks include 3 bits, 1 bit is used to indicate the closed-loop power control process corresponding to the information block, and 2 bits is used to indicate the TPC value.

Optionally, when M is equal to the number of closed-loop power control processes configured for the terminal device, the information block may not include bits for indicating the closed-loop power control processes, and the closed-loop power control processes corresponding to the information block may be in a predetermined manner. For example, the predetermined manner may be from small to large according to the process number, from large to small according to the process number, and the like, which are not limited in the embodiments of the present application. The information block may then comprise q +2 bits, wherein q bits are used to indicate the M and 2 bits are used to indicate the TPC value.

The following describes in detail a scheme in which the first information is carried in the group common downlink control information and the second information is carried in the higher layer signaling, with reference to a specific example.

Assuming that a terminal device is configured with 2 closed-loop power control processes, when the PUSCH of one closed-loop power control process does not need to adjust the closed-loop transmission power, one information block includes:

1 bit: indicating that the DCI comprises 1 information block corresponding to the terminal equipment;

1 bit: the closed loop power control process indication is 0 or 1;

2 bits: a TPC command to indicate a TPC value.

When the PUSCHs of the two closed-loop power control processes need to adjust power, the closed-loop power control process indication adopts a predefined mode, and the structures of the two information blocks are respectively as follows:

the first information block includes:

1 bit: indicating that the DCI comprises 2 information blocks corresponding to the terminal equipment;

2 bits: indicating a TPC command;

the second information block includes:

2 bits: a TPC command is indicated.

In 1020, the terminal device may determine transmit power adjustment amounts of M closed-loop power control processes of the terminal device according to the first information and the second information.

It is to be understood that, in order to implement the functions in the above embodiments, the network device and the terminal device include hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software driven hardware depends on the specific application scenario and design constraints of the solution.

Fig. 11 and fig. 12 are schematic structural diagrams of possible power control apparatuses provided in an embodiment of the present application. The apparatuses may be configured to implement the functions of the terminal device or the network device in the foregoing method embodiment, and therefore, the advantageous effects of the foregoing method embodiment may also be implemented. In the embodiment of the present application, the power control apparatus may be the terminal device 130 or the terminal device 140 shown in fig. 1, may also be the radio access network device 120 shown in fig. 1, and may also be a module (e.g., a chip) applied to the terminal device or the network device.

As shown in fig. 11, the apparatus 1100 includes a processing unit 1110 and a transceiving unit 1120. The apparatus 1100 is configured to implement the functions of the terminal device or the network device in any of the method embodiments shown in fig. 5 or fig. 10.

When the apparatus 1100 is used to implement the functions of the terminal device in the method embodiment shown in fig. 5: the transceiving unit 1120 is configured to receive a first downlink channel from a network device on a first time domain resource; the transceiver 1120 is further configured to transmit a first uplink channel to the network device on a second time domain resource, where the first uplink channel corresponds to the first downlink channel; the first uplink channel belongs to a first closed-loop power control process, the second uplink channel belongs to a second closed-loop power control process, the second uplink channel is an uplink channel corresponding to a second downlink channel, the second uplink channel is sent after the second time domain resource, and the second downlink channel is received before the first time domain resource.

When the apparatus 1100 is used to implement the functionality of a network device in the method embodiment shown in fig. 5: the transceiving unit 1120 is configured to transmit a first downlink channel to the terminal device on the first time domain resource; the transceiver 1120 is further configured to receive a first uplink channel from the terminal device on a second time domain resource, where the first uplink channel corresponds to the first downlink channel; the first uplink channel belongs to a first closed-loop power control process, the second uplink channel belongs to a second closed-loop power control process, the second uplink channel is an uplink channel corresponding to a second downlink channel, the second uplink channel is received after the second time domain resource, and the second downlink channel is sent before the first time domain resource.

When the apparatus 1100 is used to implement the functions of the terminal device in the method embodiment shown in fig. 10: the transceiver 1120 is configured to receive first information and second information from a network device, where the first information is used to indicate a number M of information blocks corresponding to the terminal device included in group common downlink control information, the second information is used to indicate positions of M information blocks corresponding to the terminal device in the group common downlink control information, each of the M information blocks is used to indicate a transmission adjustment value of a closed-loop power control process of the terminal device, and M is a positive integer greater than 1; the processing unit 1110 is configured to determine transmit power adjustment amounts of M closed-loop power control processes of the terminal device according to the first information and the second information.

When the apparatus 1100 is used to implement the functionality of a network device in the method embodiment shown in fig. 10: the processing unit 1110 is configured to determine first information and second information, where the first information is used to indicate a number M of information blocks corresponding to the terminal device included in group common downlink control information, the second information is used to indicate positions of M information blocks corresponding to the terminal device in the group common downlink control information, each of the M information blocks is used to indicate a transmit power adjustment value of a closed-loop power control process of the terminal device, and M is a positive integer greater than 1; the transceiver 1120 is configured to transmit the first information and the second information to the terminal device.

The more detailed description about the processing unit 1110 and the transceiver 1120 can be directly obtained by referring to the related description in the embodiment of the method shown in fig. 5 and fig. 10, and is not repeated herein.

As shown in fig. 12, the apparatus 1200 includes a processor 1210 and an interface circuit 1220. The processor 1210 and the interface circuit 1220 are coupled to each other. It is understood that the interface circuit 1220 may be a transceiver or an input-output interface. Optionally, the apparatus 1200 may further include a memory 1230 for storing instructions to be executed by the processor 1210 or for storing input data required by the processor 1210 to execute the instructions or for storing data generated by the processor 1210 after executing the instructions.

When the apparatus 1200 is used to implement the method shown in fig. 5 or fig. 10, the processor 1210 is configured to perform the functions of the processing unit 1110, and the interface circuit 1220 is configured to perform the functions of the transceiver 1120.

When the device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the method embodiment. The terminal device chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal device, wherein the information is sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal device, where the information is sent by the terminal device to the network device.

When the device is a chip applied to a network device, the network device chip implements the functions of the network device in the method embodiments. The network device chip receives information from other modules (such as a radio frequency module or an antenna) in the network device, wherein the information is sent to the network device by the terminal device; or, the network device chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, where the information is sent by the network device to the terminal device.

It is understood that the Processor in the embodiments of the present Application may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general purpose processor may be a microprocessor, but may be any conventional processor.

The method steps in the embodiments of the present application may be implemented by hardware, or may be implemented by software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), Programmable ROM (PROM), Erasable PROM (EPROM), Electrically Erasable PROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a network device or a terminal device. Of course, the processor and the storage medium may reside as discrete components in a network device or a terminal device.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer program or instructions may be stored in or transmitted over a computer-readable storage medium. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, hard disk, magnetic tape; or an optical medium, such as a DVD; it may also be a semiconductor medium, such as a Solid State Disk (SSD).

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the text description of the present application, the character "/" generally indicates that the preceding and following associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

Claims

1. A method of power control, comprising:

receiving a first downlink channel from a network device on a first time domain resource;

sending a first uplink channel to the network device on a second time domain resource, wherein the first uplink channel corresponds to the first downlink channel;

the first uplink channel belongs to a first closed-loop power control process, the second uplink channel belongs to a second closed-loop power control process, the first closed-loop power control process and the second closed-loop power control process are different closed-loop power control processes and independently accumulate transmission power respectively, the second uplink channel is an uplink channel corresponding to a second downlink channel, the second uplink channel is sent after the second time domain resource, and the second downlink channel is received before the first time domain resource;

the method further comprises the following steps:

receiving a third downlink channel from the network device, the third downlink channel being received before the second downlink channel;

and sending a third uplink channel to the network device, where the third uplink channel corresponds to the third downlink channel, the third uplink channel is sent before the first uplink channel, and a closed-loop power control process to which the third uplink channel belongs is the same as a closed-loop power control process to which the second uplink channel belongs.

2. The method of claim 1, wherein transmitting the first uplink channel to the network device on the second time domain resource comprises:

determining a first closed loop transmission power of the first uplink channel according to an adjustment factor and power adjustment information, wherein the power adjustment information is used for indicating a closed loop transmission power adjustment value of the first uplink channel;

and sending the first uplink channel according to the first closed loop transmitting power.

3. The method of claim 1 or 2, wherein the closed loop transmit power accumulation value of the first closed loop power control procedure is valid for a target duration.

4. The method according to claim 1 or 2, characterized in that the method further comprises:

and when the target duration is exceeded, setting the closed-loop transmission power accumulated value of the first closed-loop power control process to zero.

5. The method according to claim 1 or 2, wherein the first downlink channel is a first physical downlink shared channel, the second downlink channel is a second physical downlink shared channel, the first uplink channel is a first physical uplink control channel, and the second uplink channel is a second physical uplink control channel.

6. The method according to claim 1 or 2, wherein the first downlink channel is a first physical downlink control channel, the second downlink channel is a second physical downlink control channel, the first uplink channel is a first physical uplink shared channel, and the second uplink channel is a second physical uplink shared channel.

7. The method of claim 1 or 2, wherein after transmitting the first uplink channel to the network device, the method further comprises:

sending an SRS to the network equipment according to a second closed-loop transmission power, wherein the second closed-loop transmission power is the closed-loop transmission power of a target uplink channel;

wherein the target uplink channel is the third uplink channel.

8. The method of claim 1 or 2, wherein after transmitting the first uplink channel to the network device, the method further comprises:

the target uplink channel is an uplink channel with a priority value of a first preset value in the first uplink channel, the second uplink channel and the third uplink channel.

9. The method according to claim 1 or 2, characterized in that when a sounding reference signal, SRS, is transmitted after the first uplink channel and before the second uplink channel,

the SRS closed loop transmission power is associated with a previous SRS closed loop transmission power; or the like, or, alternatively,

the closed-loop transmit power of the SRS is associated with a previous SRS closed-loop transmit power of the same SRS process; or the like, or, alternatively,

and the closed loop transmitting power of the SRS is a second preset value.

10. A method of power control, comprising:

sending a first downlink channel to the terminal equipment on the first time domain resource;

receiving a first uplink channel from the terminal device on a second time domain resource, wherein the first uplink channel corresponds to the first downlink channel;

the first uplink channel belongs to a first closed-loop power control process, the second uplink channel belongs to a second closed-loop power control process, the first closed-loop power control process and the second closed-loop power control process are different closed-loop power control processes and independently accumulate transmission power respectively, the second uplink channel is an uplink channel corresponding to a second downlink channel, the second uplink channel is received after the second time domain resource, and the second downlink channel is sent before the first time domain resource;

the method further comprises the following steps:

sending a third downlink channel to the terminal device, wherein the third downlink channel is sent before the second downlink channel;

receiving a third uplink channel from the terminal device, where the third uplink channel corresponds to the third downlink channel, the third uplink channel is received before the first uplink channel, and a closed-loop power control process to which the third uplink channel belongs is the same as a closed-loop power control process to which the second uplink channel belongs.

11. The method of claim 10, wherein the closed loop transmit power of the first uplink channel is determined according to an adjustment factor and power adjustment information, and wherein the power adjustment information is used to indicate a closed loop transmit power adjustment value of the first uplink channel.

12. The method of claim 10 or 11, wherein the accumulated value of the closed loop transmit power of the first closed loop power control procedure is valid for a target duration.

13. The method of claim 10 or 11, wherein the closed loop transmit power accumulation value of the first closed loop power control procedure is set to zero when a target duration is exceeded.

14. The method according to claim 10 or 11, wherein the first downlink channel is a first physical downlink shared channel, the second downlink channel is a second physical downlink shared channel, the first uplink channel is a first physical uplink control channel, and the second uplink channel is a second physical uplink control channel.

15. The method according to claim 10 or 11, wherein the first downlink channel is a first physical downlink control channel, the second downlink channel is a second physical downlink control channel, the first uplink channel is a first physical uplink shared channel, and the second uplink channel is a second physical uplink shared channel.

16. The method according to claim 10 or 11, wherein after receiving the first uplink channel from the terminal device, the method further comprises:

receiving an SRS (sounding reference signal) from the terminal equipment, wherein the closed-loop transmitting power of the SRS is determined according to the closed-loop transmitting power of a target uplink channel;

wherein the target uplink channel is the third uplink channel.

17. The method according to claim 10 or 11, wherein after receiving the first uplink channel from the terminal device, the method further comprises:

18. The method according to claim 10 or 11, characterized in that when a sounding reference signal, SRS, is received after the first uplink channel and before the second uplink channel,

the closed-loop transmit power of the SRS is associated with a previous SRS closed-loop transmit power of the same SRS process; or the like, or a combination thereof,

and the closed loop transmitting power of the SRS is a second preset value.

19. A communications device comprising means for performing a method as claimed in any one of claims 1 to 9 or means for performing a method as claimed in any one of claims 10 to 18.

20. A communications device comprising a processor and interface circuitry for receiving and transmitting signals from or sending signals to other communications devices than the communications device, the processor being arranged to implement the method of any one of claims 1 to 9, or the method of any one of claims 10 to 18, by logic circuitry or executing code instructions.

21. A computer-readable storage medium, in which a computer program or instructions is stored which, when executed by a communication apparatus, implements a method as claimed in any one of claims 1 to 9, or implements a method as claimed in any one of claims 10 to 18.