阅读说明：本技术 一种上行功率控制方法及装置 (Uplink power control method and device ) 是由 胡丹 官磊 于 2020-04-30 设计创作，主要内容包括：本申请提供一种上行功率控制方法及装置,用于解决现有技术中业务可靠性差的问题。在本申请中,终端设备接收第一指示信息,第一指示信息用于指示第一预编码信息和第二预编码信息。终端设备确定第一预编码信息对应的第一组功率控制参数,以及第二预编码信息对应的第二组功率控制参数；根据第一组功率控制参数,确定第一发送功率,并根据第一发送功率和第一预编码信息,发送第一PUSCH重复；根据第二组功率控制参数,确定第二发送功率,并根据第二发送功率和第二预编码信息,发送第二PUSCH重复。针对同一业务数据,终端设备向网络设备发送两次PUSCH,分别为第一PUSCH重复和第二PUSCH重复,从而可提高上行业务的可靠性。(The application provides an uplink power control method and device, which are used for solving the problem of poor service reliability in the prior art. In the application, the terminal device receives first indication information, where the first indication information is used to indicate first precoding information and second precoding information. The terminal equipment determines a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information; determining a first transmission power according to the first group of power control parameters, and transmitting a first PUSCH repetition according to the first transmission power and the first precoding information; and determining second transmission power according to the second group of power control parameters, and transmitting a second PUSCH repetition according to the second transmission power and the second precoding information. For the same service data, the terminal equipment sends two times of PUSCHs to the network equipment, namely a first PUSCH repetition and a second PUSCH repetition, so that the reliability of the uplink service can be improved.)

1. An uplink power control method, comprising:

receiving first indication information from a network device, wherein the first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to a first Physical Uplink Shared Channel (PUSCH) repetition, and the second precoding information corresponds to a second PUSCH repetition;

determining a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information;

determining a first transmission power according to the first group of power control parameters, and transmitting the first PUSCH repetition according to the first transmission power and the first precoding information;

and determining second transmission power according to the second group of power control parameters, and transmitting the second PUSCH repetition according to the second transmission power and the second precoding information.

2. The method of claim 1, wherein the method further comprises:

receiving second indication information from a network device, where the second indication information indicates a first group of power control parameters and a second group of power control parameters, and the determining the first group of power control parameters corresponding to the first precoding information and the second group of power control parameters corresponding to the second precoding information specifically includes:

and according to the second indication information, determining a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in a power control parameter set.

3. The method of claim 1, wherein the determining the first set of power control parameters corresponding to the first precoding information and the second set of power control parameters corresponding to the second precoding information specifically includes:

and according to a preset rule, determining a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in a power control parameter set.

4. The method of claim 3, wherein the preset rules comprise: the first group of power control parameters and the second group of power control parameters are two groups of power control parameters with the smallest index in the power control parameter set respectively.

5. The method according to any of claims 2 to 4, wherein the set of power control parameters comprises at least one from the set of: the method comprises the steps of a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set and a closed-loop accumulated process number set, wherein the PUSCH open-loop power control parameter set comprises one or more groups of open-loop power control parameters consisting of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set comprises indexes qd of one or more path loss reference signals, and the closed-loop accumulated process number set comprises one or more closed-loop accumulated process numbers l.

6. The method of claim 1, wherein the first indication information further indicates the first set of power control parameters and the second set of power control parameters.

7. The method of any of claims 1 to 6, wherein the first set of power control parameters and the second set of power control parameters comprise at least one of:

a base power control parameter P0 and a path loss compensation factor alpha;

an index qd of the set of path loss reference signals; and

the closed loop accumulates the process number l.

8. An uplink power control method, comprising:

sending first indication information to a terminal device, wherein the first indication information is used for indicating first precoding information and second precoding information, the first precoding information corresponds to a first group of power control parameters used for first Physical Uplink Shared Channel (PUSCH) repetition, and the second precoding information corresponds to a second group of power control parameters used for second PUSCH repetition;

receiving a first PUSCH repetition from a terminal device using the first precoding information.

9. The method of claim 8, wherein the method further comprises:

and sending second indication information to the terminal equipment, wherein the second indication information indicates the first group of power control parameters and the second group of power control parameters in the power control parameter set.

10. The method of claim 8, wherein the method further comprises:

and determining a first group of power control parameters corresponding to the first precoding information in a power control parameter set according to a preset rule.

11. The method of claim 10, wherein the preset rules comprise: any one of the two sets of power control parameters with the smallest index in the power control parameter set is the first set of power control parameters.

12. The method according to any of claims 9 to 11, wherein the set of power control parameters comprises at least one from the set of: the method comprises the steps of a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set and a closed-loop accumulated process number set, wherein the PUSCH open-loop power control parameter set comprises one or more groups of open-loop power control parameters consisting of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set comprises indexes qd of one or more path loss reference signals, and the closed-loop accumulated process number set comprises one or more closed-loop accumulated process numbers l.

13. The method of claim 8, wherein the first indication information further indicates the first set of power control parameters and the second set of power control parameters.

14. The method of any of claims 8 to 12, wherein the first set of power control parameters and the second set of power control parameters comprise at least one of:

a base power control parameter P0 and a path loss compensation factor alpha;

an index qd of the set of path loss reference signals; and

the closed loop accumulates the process number l.

15. An uplink power control apparatus, comprising means for performing the method of any one of claims 1 to 7 or 8 to 14.

16. An uplink power control device comprising a processor and a communication interface for receiving and transmitting signals from or sending signals to a communication device other than the communication device, wherein the processor is configured to implement the method of any one of claims 1 to 7 or 8 to 14 by logic circuits or executing code instructions.

17. A computer-readable storage medium, characterized in that it stores a computer program which, when executed, implements the method of any one of claims 1 to 7 or 8 to 14.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling uplink power.

Background

The International Telecommunications Union (ITU) defines three major application scenarios for 5G and future mobile communication systems, which are: enhanced mobile bandwidth (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communications (mtc). Typical URLLC services include: wireless control in industrial manufacturing or production processes, motion control in unmanned, remote repair, and remote surgery. The main characteristics of these services are that they require ultra-high reliability, low latency, less data volume to transmit, and burstiness, etc. How to ensure the transmission reliability of the URLLC service is a technical problem to be solved by the embodiments of the present application.

Disclosure of Invention

The embodiment of the application provides an uplink power control method and device, so as to ensure the transmission reliability of a URLLC service.

In a first aspect, an execution subject of the method may be a terminal device, or a chip applied to the terminal device. The following description will be given taking as an example that the execution main body is a terminal device. The terminal device receives first indication information from the network device, wherein the first indication information is used for indicating first precoding information and second precoding information, the first precoding information can correspond to a first PUSCH repetition, and the second precoding information can correspond to a second PUSCH repetition. The terminal equipment determines a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information; determining a first transmission power according to the first group of power control parameters, and transmitting a first PUSCH repetition according to the first transmission power and the first precoding information; and determining second transmission power according to the second group of power control parameters, and transmitting a second PUSCH repetition according to the second transmission power and the second precoding information. For the same service, the terminal equipment sends two times of PUSCHs to the network equipment, namely a first PUSCH repetition and a second PUSCH repetition, so that the reliability of the uplink service can be improved. Further, the terminal device may send PUSCH repetitions to different network devices. For example, the terminal device may send a first PUSCH repetition to a first TRP and a second PUSCH repetition to a second TRP. Because the distances from different TRPs to the terminal equipment are different and the channel conditions are also different, different power control parameters are adopted to respectively determine the first PUSCH repetition sent to the first transmission and reception point TRP and the second PUSCH repetition sent to the second TRP, so that the repeated performance of the PUSCHs can be improved, and the repeated reliability of the PUSCHs can be further improved.

In one possible design, the terminal device may receive second indication information from the network device, the second indication information being usable to indicate the first set of power control parameters and the second set of power control parameters. The terminal device may determine, according to the second indication information, a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in the power control parameter set. In the embodiment of the application, the first group of power control parameters and the second group of power control parameters can be flexibly indicated through the second indication information.

In another possible design, the terminal device may determine the first set of power control parameters and the second set of power control parameters from the power control parameter set according to a preset rule. Optionally, the preset rule includes: the first group of power control parameters and the second group of power control parameters are two groups of power control parameters with the smallest index in the power control parameter set respectively. The network equipment does not need additional indication, and the terminal equipment can determine the first group of power control parameters and the second group of power control parameters, so that the signaling overhead is reduced.

In another possible design, the first indication information may also be used to indicate the first set of power control parameters and the second set of power control parameters. The terminal equipment can determine a first group of power control parameters and a second group of power control parameters besides the first precoding information and the second precoding information according to the first indication information. Therefore, the precoding information and the power control parameter can be simultaneously prompted by adopting one indication information, and the signaling overhead can be reduced.

In another possible design, the set of power control parameters includes one or more of the following sets: a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set, or a closed-loop accumulated process number set.

The PUSCH open-loop power control parameter set includes one or more sets of open-loop power control parameters composed of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set includes an index qd of one or more path loss reference signals, and the closed-loop accumulation process number set includes one or more closed-loop accumulation process numbers l.

In one possible design, the first set of power control parameters and the second set of power control parameters include at least one of: the base power control parameter P0 and the path loss compensation factor alpha, the index qd of the set of path loss reference signals, or the closed loop accumulated process number l.

In a second aspect, an execution subject of the method is a network device, which may also be a chip in the network device. The following description will be given taking as an example that the execution subject is a network device. The method comprises the steps that a network device sends first indication information to a terminal device, wherein the first indication information can be used for indicating first precoding information and second precoding information, the first precoding information corresponds to a first group of power control parameters used for PUSCH (physical uplink shared channel) repetition, and the second precoding information corresponds to a second group of power control parameters used for PUSCH repetition; the network device receives a first PUSCH repetition from the terminal device using the first precoding information.

In one possible design, the network device may send second indication information to the terminal device, the second indication information indicating the first set of power control parameters and the second set of power control parameters in the set of power control parameters. Through the design, the network equipment can indicate the precoding information through the first indication information and indicate the power control parameter through the second indication information, and the precoding information and the power control parameter are not influenced mutually, so that the indication mode is more flexible.

In one possible design, the first indication information further indicates the first set of power control parameters and the second set of power control parameters. By adopting the design, the network equipment can simultaneously indicate the precoding information and the power control parameters through the same indication information, and compared with the prior art, the signaling overhead can be reduced.

In a possible design, the network device may determine, according to a preset rule, a first group of power control parameters corresponding to the first precoding information in a power control parameter set. Optionally, the preset rule includes: any one of the two sets of power control parameters with the smallest index in the power control parameter set is the first set of power control parameters. Through the method, the network equipment does not need to additionally indicate the power control parameter, and the signaling overhead is reduced.

In one possible design, the set of power control parameters includes at least one of the following sets: the method comprises the steps of collecting a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set or a closed-loop accumulated process number set, wherein the PUSCH open-loop power control parameter set comprises one or more groups of open-loop power control parameters consisting of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set comprises indexes qd of one or more path loss reference signals, and the closed-loop accumulated process number set comprises one or more closed-loop accumulated process numbers l.

In one possible design, the first set of power control parameters and the second set of power control parameters include at least one of: the base power control parameter P0 and the path loss compensation factor alpha, the index qd of the set of path loss reference signals or the closed loop accumulated process number l.

In a third aspect, a method for controlling uplink power is provided, and beneficial effects may be seen in the description of the first aspect. The communication device has the functionality to implement the actions in the method embodiment of the first aspect described above. The functions may be implemented by the respective software. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes: a transceiver module, configured to receive first indication information from a network device, where the first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to a first physical uplink shared channel, PUSCH, repetition, and the second precoding information corresponds to a second PUSCH repetition; a processing module, configured to determine a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information, determine a first transmission power according to the first group of power control parameters, and send the first PUSCH repetition according to the first transmission power and the first precoding information, and determine a second transmission power according to the second group of power control parameters, and send the second PUSCH repetition according to the second transmission power and the second precoding information. The modules may perform corresponding functions in the method example of the first aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.

In a fourth aspect, a communication apparatus is provided, and advantageous effects may be found in the description of the second aspect and will not be described herein again. The communication device has the functionality to implement the actions in the method example of the second aspect described above. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the communication device includes: the communication module is configured to send first indication information to a terminal device, where the first indication information is used to indicate first precoding information and second precoding information, the first precoding information corresponds to a first group of power control parameters used for PUSCH repetition of a first physical uplink shared channel, and the second precoding information corresponds to a second group of power control parameters used for PUSCH repetition of a second physical uplink shared channel. A processing module for controlling the communication module to receive the first PUSCH repetition from the terminal device using the first precoding information. The modules may perform corresponding functions in the method example of the second aspect, for specific reference, detailed description of the method example is given, and details are not repeated here.

In a fifth aspect, a communication apparatus is provided, where the communication apparatus may be the terminal device in the above method embodiment, or a chip provided in the terminal device. The communication device comprises a communication interface, a processor and optionally a memory. Wherein the memory is adapted to store a computer program or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the communication apparatus is adapted to perform the method performed by the terminal device in the above-mentioned method embodiments.

In a sixth aspect, a communication apparatus is provided, where the communication apparatus may be the network device in the above method embodiment, or a chip disposed in the network device. The communication device comprises a communication interface, a processor and optionally a memory. Wherein the memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, and when the processor executes the computer program or instructions, the communication device is caused to execute the method executed by the network device in the above method embodiment.

In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code which, when run, causes the method performed by the terminal device in the above aspects to be performed.

In an eighth aspect, there is provided a computer program product comprising: computer program code which, when executed, causes the method performed by the network device in the above aspects to be performed.

In a ninth aspect, the present application provides a chip system, which includes a processor, and is configured to implement the functions of the terminal device in the methods of the above aspects. In one possible design, the system-on-chip further includes a memory for storing program instructions and/or data. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a tenth aspect, the present application provides a chip system, which includes a processor for implementing the functions of the network device in the method of the above aspects. In one possible design, the system-on-chip further includes a memory for storing program instructions and/or data. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In an eleventh aspect, the present application provides a computer-readable storage medium storing a computer program that, when executed, implements the method performed by the terminal device in the above-described aspects.

In a twelfth aspect, the present application provides a computer-readable storage medium storing a computer program that, when executed, implements the method performed by the network device in the above-described aspects.

Drawings

Fig. 1 and fig. 2 are schematic diagrams of PUSCH repeated transmission provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a network architecture provided in an embodiment of the present application;

fig. 4, fig. 5, fig. 6 and fig. 7 are flowcharts of a communication method provided by an embodiment of the present application;

fig. 8 and 9 are schematic diagrams of a communication device according to an embodiment of the present application.

Detailed Description

Reference will first be made to a noun or term referred to in embodiments herein, which is also included as part of the summary.

Terminal equipment

A terminal device, which may be referred to as a terminal for short, also called a User Equipment (UE), is a device with a wireless transceiving function. The terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, drones, balloons, satellites, etc.). The terminal equipment can be a mobile phone, a tablet personal computer, a computer with a wireless transceiving function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in unmanned driving, wireless terminal equipment in telemedicine, wireless terminal equipment in a smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in a smart city and wireless terminal equipment in a smart family. The terminal equipment may also be fixed or mobile. The embodiments of the present application do not limit this.

In the embodiment of the present application, the apparatus for implementing the function of the terminal may be a terminal device; it may also be an apparatus, such as a system-on-chip, capable of supporting the terminal device to implement the function, and the apparatus may be installed in the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal device is taken as an example of a terminal device, and the technical solution provided in the embodiment of the present application is described.

Network device

The network device may be an access network device, and the access network device may also be referred to as a Radio Access Network (RAN) device, which is a device providing a wireless communication function for the terminal device. Access network equipment includes, for example but not limited to: a next generation base station (gbb) in 5G, an evolved node B (eNB), a baseband unit (BBU), a transceiving point (TRP), a Transmitting Point (TP), a base station in a future mobile communication system or an access point in a WiFi system, and the like. The access network device may also be a radio controller, a Central Unit (CU), and/or a Distributed Unit (DU) in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, a vehicle-mounted device, a network device in a Public Land Mobile Network (PLMN) network that is evolved in the future, and the like.

The terminal device may communicate with multiple access network devices of different technologies, for example, the terminal device may communicate with an access network device supporting Long Term Evolution (LTE), may communicate with an access network device supporting 5G, and may simultaneously communicate with an access network device supporting LTE and an access network device supporting 5G. The embodiments of the present application are not limited.

In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device; or may be a device, such as a system-on-chip, capable of supporting the network device to implement the function, and the device may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is taken as an example of a network device, and the technical solution provided in the embodiment of the present application is described.

Third, Uplink (UL) Configuration Grant (CG)

The uplink configuration authorization refers to that the uplink transmission of the terminal equipment does not need the scheduling of the network equipment, and the terminal equipment carries out the uplink transmission according to the configuration information. Uplink configuration grant transmission is also called Grant Free (GF) or scheduling-free (scheduling-free) uplink transmission. The uplink configuration authorization comprises two types, namely uplink configuration authorization of type 1 and uplink configuration authorization of type 2. The difference between the two is that all the parameters in the uplink configuration grant of type 1 are pre-configured by the network device, so that when the terminal device uses the uplink configuration grant of type 1 to send uplink service data, the terminal device directly uses the parameters configured by the network device, and does not need additional scheduling information. When the terminal equipment uses the uplink configuration authorization of type 2 to send uplink service data, it needs to additionally receive a trigger message to perform uplink data transmission. The trigger information may be Downlink Control Information (DCI) or the like.

For uplink configuration grants of type 1 and type 2, one or more of the following information may be preconfigured by higher layer parameters: the method includes a frequency hopping mode, a demodulation reference signal (DMRS) configuration, a Modulation and Coding Scheme (MCS) table selection, a frequency domain resource allocation mode selection, a Physical Uplink Shared Channel (PUSCH) Resource Block Group (RBG) size configuration selection, a power control loop selection, an open loop power control parameter (including a target signal-to-noise ratio, a path loss compensation factor, and the like), a number of HARQ (hybrid automatic repeat request) processes, a retransmission number, a redundancy version sequence, a period, and the like.

Further, for the uplink configuration grant of type 1, the configuration information may include, in addition to one or more of the above information: time-frequency resource allocation, time domain offset, antenna port, precoding information, layer number, Sounding Reference Signal (SRS) resource indication, modulation order, target code rate, transmission block size, frequency hopping offset, path loss reference index, Beta-offset indication, and the like.

For the uplink configuration authorization of type 2, the resource allocation obeys the configuration of the high-level parameters, and in addition, the terminal equipment can perform scheduling-free transmission only after receiving the trigger information.

Four, PUSCH repetition

The PUSCH repetition may refer to: the network device sends an uplink grant or an unlicensed grant indicating one or more nominal PUSCH retransmission. And after receiving the uplink grant or the uplink authorization-free indication, the terminal equipment transmits one or more actual PUSCH copies in one time slot or transmits two or more actual PUSCH copies in a plurality of available time slots according to the uplink grant or the uplink authorization-free indication. In the embodiment of the present application, two actual PUSCH copies are transmitted as an example for explanation.

The network device adds a column in the time domain resource allocation table to indicate the number of copies (number repetition) of the class B PUSCH repeated transmission, and the value of the number may be {1,2,3,4,7,8,12,16 }. The uplink scheduling signaling or the first type of authorization-free configuration information indicates the starting symbol S and the duration L of the first nominal PUSCH, the duration L of each nominal PUSCH copy is the same, wherein S is more than or equal to 0 and less than or equal to 13, L is more than or equal to 1 and less than or equal to 14, the S and the L are respectively indicated by 4 bits of high-level signaling, and S + L >14 can be realized. The Transport Block Size (TBS) of the nominal and actual PUSCH copies is determined from the time domain length L of the nominal PUSCH. Starting with the second nominal PUSCH, the starting symbol of the nominal PUSCH replica is the next symbol to the terminating symbol of the last nominal PUSCH replica.

Before determining the time domain resource of the actual PUSCH copy, the terminal device needs to determine an invalid symbol (invalid symbol). The terminal device determines the invalid symbol as follows:

higher layer parameters (e.g. tdd-UL-DL-configuration common or

tdd-UL-DL-configurable determined) semi-statically configured downlink symbol is an invalid symbol.

A high layer parameter (e.g., InvalidSymbolPattern) configures a symbol level bitmap (bitmap) with a bit value of 1 indicating that the corresponding symbol is an invalid symbol. When the DCI format 0_1 or 0_2 schedules PUSCH repetition or activates a second type of authorization-free PUSCH repetition, and a 1-bit invalid symbol pattern indication information field is configured in the DCI, when the value of the invalid symbol pattern indication information field is 1, the terminal equipment applies the invalid symbol pattern; otherwise the terminal device ignores the invalid symbol pattern. If the DCI does not contain the invalid symbol pattern indication information field, the terminal equipment directly applies the invalid symbol pattern according to the configuration of a high-layer parameter InvalidSymbolPattern. Different DCI formats independently configure an invalid symbol pattern indication information field.

After determining the invalid symbols in each nominal PUSCH time domain resource based on Type B PUSCH repetition, the terminal device may consider the remaining symbols as potentially valid symbols. If the number of continuous potential valid symbols in a time slot of a nominal PUSCH is more than 0, an actual PUSCH copy can be mapped, and the time domain resources of the nominal PUSCH copy may include the time domain resources of one or more actual PUSCH copies. The terminal device does not send an actual PUSCH copy of a single symbol unless the single symbol is the duration L of the nominal PUSCH as indicated by the network device.

For the grant-free PUSCH repetition based on Type B, if a dynamic slot indicator (SFI) is received within the entire duration of an actual PUSCH copy and collides with a dynamic downlink or flexible symbol, the actual PUSCH copy is not transmitted; if no dynamic SFI is received on at least one symbol within the duration of an actual PUSCH replica and collides with at least one semi-static flexible symbol, the actual PUSCH replica is not transmitted.

In order to improve the transmission reliability of the URLLC service, a scheme is provided: the PUSCH is cooperatively processed and received through two Transmission Reception Points (TRPs) so as to improve the PUSCH transmission reliability. The process can be as follows: the TRP #1 transmits an uplink grant (UL grant) to the UE, and the UE transmits a first PUSCH repetition and a second PUSCH repetition to the TRP #1 and TRP #2, respectively. Optionally, the first PUSCH repeatedly corresponds to the first precoding information, and the second PUSCH repeatedly corresponds to the second precoding information. The different precoding information may include: different transmit beams (corresponding to the analog precoding scheme, the UE changes the transmit beams by changing the phase of the phase shifter), different antenna ports, or different antenna virtualization modes (corresponding to the digital precoding scheme, the UE generates different transmit beams by the digital weights between different antennas), etc.

As shown in fig. 1, the first PUSCH repetition and the second PUSCH repetition occupy the same time domain resources, but different frequency domain resources. For example, a first PUSCH repetition may occupy a first frequency domain resource and a second PUSCH repetition may occupy a second frequency domain resource. Alternatively, as shown in fig. 2, the first PUSCH repetition and the second PUSCH repetition may occupy the same frequency domain resources, but different time domain resources. For example, a first PUSCH repetition may occupy a first time domain resource and a second PUSCH repetition may occupy a second time domain resource.

In this scheme, the first PUSCH repetition and the second PUSCH repetition correspond to the same set of power control parameters, i.e., the first PUSCH repetition and the second PUSCH repetition correspond to the same transmission power. Because the distances from different TRPs to the UE are different and the channel conditions are also different, the same power control parameter is adopted, and the calculation of the repeated transmission power of two PUSCHs is unreasonable, so that the repeated transmission performance of the PUSCHs can be influenced, and the repeated transmission reliability of the PUSCHs can be further reduced.

As shown in fig. 3, a schematic diagram of a network architecture is provided, including terminal device 110 and access network device 120. The terminal device 110 and the access network device 120 may communicate via a Uu air interface, which may be understood as a universal interface (universal UE to network interface) between the terminal device and the network device. The transmission of the Uu air interface comprises uplink transmission and downlink transmission.

Here, the uplink transmission refers to terminal device 110 sending uplink information to access network device 120. The uplink information may include one or more of uplink data information, uplink control information, and a Reference Signal (RS). A channel for transmitting uplink information is called an uplink channel, and the uplink channel may be a PUSCH or a Physical Uplink Control Channel (PUCCH). The PUSCH is used to carry uplink data, which may also be referred to as uplink data information. The PUCCH is used to carry Uplink Control Information (UCI) fed back by the terminal device. The UCI may include Channel State Information (CSI), an Acknowledgement (ACK), a Negative Acknowledgement (NACK), and the like. Downlink transmission refers to access network device 120 sending downlink information to terminal device 110. The downlink information may include one or more of downlink data information, downlink control information, and downlink reference signals. The downlink reference signal may be a channel state information reference signal (CSI-RS) or a Phase Tracking Reference Signal (PTRS). A channel for transmitting downlink information is called a downlink channel, and the downlink channel may be a Physical Downlink Shared Channel (PDSCH) or a Physical Downlink Control Channel (PDCCH). The PDCCH is used to carry Downlink Control Information (DCI), and the PDSCH is used to carry downlink data, where the downlink data may also be referred to as downlink data information.

Optionally, in the network architecture shown in fig. 3, a core network device 130 may also be included. Terminal device 110 may be wirelessly connected to access network device 120, and access network device 120 may be wired or wirelessly connected to core network device 130. Further, the network architecture may further include other network devices, such as a wireless relay device and a wireless backhaul device, which are not limited. Access network device 120 and core network device 130 may be separate and distinct physical devices, or access network device 120 and core network device 130 may be the same physical device having all or part of the logical functions of core network device 130 and access network device 120 integrated thereon.

In the embodiment of the present application, the number of core network devices, access network devices, and terminal devices included in the network architecture shown in fig. 3 is not limited. For example, the network architecture may include one core network device, two radio access network devices and one terminal device, and the two radio access network devices may serve the one terminal device at the same time. The two radio access network devices may be TRP #1 and TRP #2 described above. In this embodiment of the present application, TRP #1 and TRP #2 may be two gnbs, may also be two DUs in a CU-DU architecture, and may also be two Radio Remote Units (RRUs) in the gnbs.

The embodiment of the application provides a method and a device for controlling uplink power, and the principle of the method is as follows: and the terminal equipment respectively calculates the repeated transmission power of the first PUSCH and the repeated transmission power of the second PUSCH by adopting two groups of different power control parameters. Compared with the method, the repeated transmission power of the first PUSCH and the repeated transmission power of the second PUSCH are calculated by adopting the same group of power control parameters, the repeated transmission performance of the PUSCH can be ensured, and the repeated transmission reliability of the PUSCH is improved.

As shown in fig. 4, a flowchart of an uplink power control method is provided, where the method may be executed by a terminal device and a network device, and may also be executed by chips in the terminal device and the network device, and the method includes:

s601: the network equipment sends first indication information to the terminal equipment, wherein the first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to a first PUSCH repetition, and the second precoding information corresponds to a second PUSCH repetition. Correspondingly, the terminal equipment receives the first indication information.

For example, the network device may indicate two pieces of precoding information, namely the first precoding information and the second precoding information, of the N pieces of precoding information through the first indication information. N is an integer greater than 2, and the N pieces of precoding information may be defined by a protocol, or the network device is configured for the terminal device in advance. The precoding information may be a precoding matrix, and the first indication information may be a Transmitted Precoding Matrix Indicator (TPMI). When the value of N is 6, 6 precoding matrixes and T corresponding to the precoding matrixesThe corresponding relationship of PMIs can be seen from table 1. For example, when the TPMI index carried by the first indication information is 0 and 1, respectively, the first precoding matrix may beThe second precoding matrix may be

TABLE 1

S602: the terminal equipment determines a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information.

The first set of power control parameters and the second set of power control parameters are two sets of power control parameters in a set of power control parameters. In one example, the set of power control parameters may include at least one of the following: a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set and a closed-loop accumulated process number set. The PUSCH open-loop power control parameter set comprises one or more groups of open-loop power control parameters composed of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set comprises indexes qd of one or more path loss reference signals, and the closed-loop accumulation process number set comprises one or more closed-loop accumulation process numbers l. The set of power control parameters may be predefined by a protocol, or the network device may be configured for the terminal device in advance, without limitation.

In one possible implementation manner, the network device may send second indication information to the terminal device, where the second indication information is used to indicate the first set of power control parameters and the second set of power control parameters. The terminal device may determine, according to the second indication information, a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in the power control parameter set. Or, the terminal device may determine, according to a preset rule, a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in the power control parameter set. The preset rules include: the two groups of power control parameters with the smallest index in the power control parameter set are respectively a first group of power control parameters and a second group of power control parameters. For example, the set of power control parameters with the smallest index may be the first set of power control parameters, and the set of power control parameters with the next smallest index may be the second set of power control parameters. Alternatively, the set of power control parameters with the next smallest index may be the first set of power control parameters, and the set of power control parameters with the smallest index may be the second set of power control parameters. Or, the first indication information is further used for indicating a first group of power control parameters and a second group of power control parameters. The terminal device may further determine a first set of power control parameters and a second set of power control parameters in the set of power control parameters according to the first indication information.

In one possible implementation, the set of power control parameters includes only a set of PUSCH open-loop power control parameters. The first set of power control parameters and the second set of power control parameters may be embodied as a first set of open loop power control parameters and a second set of open loop power control parameters. The specific process can be as follows:

the network device may configure a PUSCH open-loop power control parameter set for the terminal device in advance through a higher-layer parameter (e.g., p0-AlphaSets parameter), where the set includes multiple sets of open-loop power control parameters, and each set of open-loop power control parameters corresponds to an Identifier (ID). For example, four sets of open-loop power control parameters are included in the PUSCH open-loop power control parameter set, and the identifiers are sequentially 0, 1,2, and 3, which are respectively (P0_0, alpha _0), (P0_1, alpha _1), (P0_2, alpha _2), and (P0_3, alpha _ 3). The network equipment can send second indication information to the terminal equipment, and the second indication information can carry the identifiers of the two groups of open-loop power control parameters; the terminal equipment can determine a first group of open-loop power control parameters and a second group of open-loop power control parameters according to the identifiers of the two groups of open-loop power control parameters. For example, if the identifiers carried by the second indication information are 0 and 1, (P0_0, alpha _0) corresponding to the identifier 0 is the first group of power control parameters, and (P0_1, alpha _1) corresponding to the identifier 1 is the second group of power control parameters. Alternatively, (P0_0, alpha _0) corresponding to the flag 0 is the second group of power control parameters, and (P0_1, alpha _1) corresponding to the flag 1 is the first group of power control parameters, which is not limited. Regarding the above procedure for indicating the first set of power control parameters and the second set of power control parameters by using the first indication information, similar to the above procedure, no additional description is provided herein. Or, the manner of selecting the first group of power control parameters and the second group of power control parameters by the terminal device in the PUSCH open-loop power control parameter set may be predefined by a protocol. For example, the smallest set of power control parameters, i.e., (P0_0, alpha _0), is identified as the first set of power control parameters, and the next smallest set of power control parameters, i.e., (P0_1, alpha _1), is identified as the second set of power control parameters. Alternatively, the next smallest set of power control parameters, i.e., (P0_1, alpha _1), is identified as the first set of power control parameters, and the smallest set of power control parameters, i.e., (P0_0, alpha _0), is identified as the second set of power control parameters.

In one possible implementation, only the set of PUSCH path loss reference signal sets is included in the set of power control parameters. The first set of power control parameters and the second set of power control parameters may be embodied as a first set of path loss reference signals and a second set of path loss reference signals. Each set of path loss reference signals may include one or more Synchronization Signal Blocks (SSBs), and/or one or more CSI-RSs. The specific process can be as follows:

the network device may configure the terminal device with the PUSCH pathloss reference signal set by a higher layer parameter (e.g., pathlossrerencestoaddmodlist parameter). The PUSCH path loss reference signal set includes one or more groups of path loss reference signals, and each group of path loss reference signals corresponds to one identifier. The network equipment can send second indication information to the terminal equipment, and the second indication information can carry the identifiers of the two groups of path loss reference signal groups; the terminal equipment can determine the first group of path loss reference signals and the second group of path loss reference signals according to the identifiers of the two groups of path loss reference signals. Regarding the above process for determining the first set of path loss reference signals and the second set of path loss reference signals by using the first indication information, similar to the above process, no additional description is provided herein. Alternatively, the terminal device may determine the first set of path loss reference signals and the second set of path loss reference signals according to a predefined definition of the protocol. For example, the path loss reference signal group with the smallest index, i.e., the pusch-pathlossfrerencers-0, may be the first group of path loss reference signals, and the path loss reference signal group with the second smallest index, i.e., the pusch-pathlossfrerencers-1, may be the second group of path loss reference signals. Alternatively, the path loss reference signal group with the smallest index, i.e., the pusch-pathlossfrerencers-1, may be the first group of path loss reference signals, and the path loss reference signal group with the smallest index, i.e., the pusch-pathlossfrerencers-0, may be the second group of path loss reference signals, which is not limited.

When the power control parameter set includes multiple sets, the terminal device may determine corresponding power control parameters in the multiple sets, and finally form a first group of power control parameters and a second group of power control parameters. For example, the first indication information or the second indication information may carry two identifiers, and the terminal device may determine power control parameters corresponding to the two identifiers in the plurality of sets, respectively, and finally form a first group of power control parameters and a second group of power control parameters. For example, the power control parameter set includes a PUSCH open-loop power control parameter set and a PUSCH path loss reference signal set. The identifiers carried by the first indication information or the second indication information are 0 and 1, and the terminal device may determine (P0_0, alpha _0) and (P0_1, alpha _1) in the PUSCH open-loop power control parameter set according to the identifiers 0 and 1. Similarly, the terminal device may determine the PUSCH-PathlossReferenceRS-0 and the PUSCH-PathlossReferenceRS-1 in the PUSCH pathloss reference signal group set according to the identifier 0 and the identifier 1. Then { P0_0, alpha _0, pusch-PathlossReferenceRS-0} may constitute a first set of power control parameters, and { P0_1, alpha _1pusch-PathlossReferenceRS-1} may constitute a second set of power control parameters. Alternatively, { P0_1, alpha _1, pusch-PathlossReferenceRS-1} may constitute the first set of power control parameters, and { P0_0, alpha _0, pusch-PathlossReferenceRS-0} may constitute the second set of power control parameters, without limitation. Alternatively, the terminal device may determine different power control parameters in different sets according to a predefined rule, and finally form the first group of power control parameters and the second group of power control parameters. Still following the above example, the set of power control parameters includes a set of PUSCH open-loop power control parameters and a set of PUSCH path loss reference signals. The terminal device may determine the power control parameter with the smallest index (P0_0, alpha _0) and the power control parameter with the second smallest index (P0_1, alpha _1) from the PUSCH open-loop power control parameter set according to a predefined rule. And determining the path loss reference signal PUSCH-pathlosslerreferenceRS-0 with the smallest index and the path loss reference signal PUSCH-pathlossleferenceRS-1 with the smallest index in the PUSCH path loss reference signal group set. Finally, (P0_0, alpha _0, pusch-PathlossReferenceRS-0) constitutes a first set of power control parameters, (P0_1, alpha _1, pusch-PathlossReferenceRS-1) constitutes a second set of power control parameters. Of course, the opposite is also possible and not limiting.

In the above example, the power control parameters with the same index are determined in a plurality of sets, and the first group of power control parameters and the second group of power control parameters are respectively formed. Of course, the power control parameters with different indexes may be determined in the above-mentioned plurality of sets, and then the first set of power control parameters and the second set of power control parameters are formed. In this case, the first indication information or the second indication information needs to indicate the corresponding power control parameter identifier in each set. Optionally, the first indication information or the second indication information may further include identifiers of different sets. For example, still following the above example, the set of power control parameters includes a set of PUSCH open-loop power control parameters and a set of PUSCH path loss reference signals. For convenience of subsequent description, the identification of the PUSCH open-loop power control parameter set may be set to set 0, and the identification of the PUSCH path loss reference signal set may be set to set 1. The first indication information or the second indication information may include a set 0, and the first identifier and the second identifier in the set 0, a set 1, and the third identifier and the fourth identifier in the set 1. The terminal device may determine two sets of open-loop power control parameters in the set 0 according to the first identifier and the second identifier. Similarly, the terminal device may determine two sets of path loss reference signals in the set 1 according to the third identifier and the fourth identifier. And finally, respectively forming a first group of power control parameters and a second group of power control parameters according to the two groups of open-loop power control parameters and the two groups of path loss reference signals. Similarly, in the embodiment of the present application, different predetermined rules may be set in each set, the corresponding power control parameters are respectively determined, and finally, the first group of power control parameters and the second group of power control parameters are formed.

S603: and the terminal equipment determines first transmission power according to the first group of power control parameters, and transmits a first PUSCH repetition to the network equipment according to the first transmission power and the first precoding information. Accordingly, the network device may receive the first PUSCH repetition according to the first precoding information.

S604: and the terminal equipment determines second transmission power according to the second group of power control parameters, and transmits a second PUSCH repetition to the network equipment according to the second transmission power and the second precoding information. Accordingly, the network device may receive a second PUSCH repetition according to the second precoding information. The relation of the time-frequency resources occupied by the first PUSCH repetition and the second PUSCH repetition can be as follows: the time domain resources are the same and the frequency domain resources are not overlapped with each other, or the frequency domain resources are the same and the time domain resources are not overlapped with each other.

Optionally, the terminal device determines the first transmission power according to the first group of power control parameters, or the terminal device determines the second transmission power according to the second group of power control parameters, where the following conditions are satisfied:

wherein, P_{_PUSCH,b,}f_,c(i,j,q_dL) denotes the first or second transmission power, P_CMAX,f_,c(i) Representing the maximum transmission power, P, of said terminal device_{O_PUSCH,b,f,c}(j) Representing the open-loop base power control parameter,indicates the bandwidth occupied by PUSCH, alpha_b,f,c(j) Represents the path loss compensation factor (i.e., alpha, above), PL_b,f,c(qd) denotes the path loss measured on the basis of the set of path loss reference signals qd, Δ_TF,b,f,c(i) Adjustment value, f, indicating MCS used for PUSCH transmission_b,f,c(i, l) represents a closed loop power adjustment value, controlled by the DCI. Further, P_{O_PUSCH,b,f,c}(j) The following conditions may be satisfied:

P_{O_PUSCH,b,f,c}(j)＝P_{O_NOMINAL_PUSCH,f,c}(j)+P_{O_UE_PUSCH,b,f,c}(j)；

wherein, P_{O_PUSCH,b,f,c}(j) Representing the open-loop base power control parameter, P_{O_UE_PUSCH,b,f,c}(j) Indicates the base power control parameter (i.e., P0, above), P_{O_NOMINAL_PUSCH,f,c}(j) A power control parameter representing a higher layer parameter configuration.

In the above two formulas, b represents an activated uplink bandwidth part (BWP), f represents a carrier, c represents a serving cell, i represents a PUSCH transmission timing, j represents a parameter set configuration index, l represents a closed loop power control adjustment index, and qd represents an index of a path loss reference signal group.

In a possible implementation manner, the network device in fig. 6 may include a first TRP and a second TRP, specifically: the first TRP may transmit the first indication information and/or the second indication information to the terminal device. The terminal device may send the first PUSCH repetition to the first TRP and the second PUSCH repetition to the second TRP.

As can be seen from the above, in the embodiment of the present application, different sets of power control parameters may be determined for different PUSCH repetitions. For example, the first PUSCH repetition corresponds to a first set of power control parameters, and the transmit power of the first PUSCH repetition is determined according to the first set of power control parameters. And the second PUSCH repetition corresponds to a second group of power control parameters, and the transmission power of the second PUSCH repetition is determined according to the second group of power control parameters. Compared with the method, the method has the advantages that the sending power of the first PUSCH repetition and the sending power of the second PUSCH repetition are determined according to the same group of power control parameters, the repeated performance of the PUSCH can be improved, and the repeated reliability of the PUSCH is further improved.

As shown in fig. 5, a flowchart of an uplink control method is provided, where the flowchart may be the flowchart shown in fig. 6, and is applied to an example of a PUSCH based on scheduling. The process comprises the following steps:

s701: the first TRP sends Downlink Control Information (DCI) to the UE, and the DCI is used for indicating the UE to send PUSCH repetition to at least two TRPs. For example, a first PUSCH repetition is transmitted to a first TRP, and a second PUSCH repetition is transmitted to a second TRP.

The DCI may include a first information field, where the first information field is used to indicate precoding information corresponding to PUSCH transmission. For example, the first information field indicates first precoding information and second precoding information. The first precoding information corresponds to a first PUSCH repetition and the second precoding information corresponds to a second PUSCH repetition. The first PUSCH repetition and the second PUSCH repetition transmit the same transport block. The redundancy versions corresponding to the first PUSCH repetition and the second PUSCH repetition are the same or different. Optionally, the first information field may further include the number of layers in addition to the precoding information.

In a possible implementation manner, the DCI may further include a second information field, where the second information field is used to indicate the first set of power control parameters and the second set of power control parameters. The first set of power control parameters and the second set of power control parameters may include at least one of: the base power control parameter P0, the path loss compensation factor alpha, the index qd of the path loss reference signal set and the closed loop accumulated process number l. Optionally, the first set of power control parameters and the second set of power control parameters include the same kind of power control parameters. For example, if the first set of power control parameters includes P0, alpha, and qd, then the second set of power control parameters also includes P0, alpha, and qd. Similarly, if the first set of power control parameters includes only P0 and alpha, then the second set of power control parameters also includes only P0 and alpha. The second information field may be an SRS resource indication.

In another possible implementation manner, the DCI may not include the second information field, and the terminal device may select two sets of power control parameters, which are the first set of power control parameters and the second set of power control parameters, from a power control parameter set configured by a higher layer parameter by using a predefined rule.

In another possible implementation manner, the first information field may be an SRS resource indication, and the first information field is further used for indicating a first set of power control parameters and a second set of power control parameters. The terminal equipment can determine a first group of power control parameters and a second group of power control parameters according to the first indication information. The process of the terminal device selecting two sets of power control parameters according to the second information field, the predefined rule or the first information field may specifically refer to the description in fig. 6, and will not be described additionally herein.

S702: and the terminal equipment determines the transmission power of the first PUSCH repetition according to the first group of power control parameters, and transmits the first PUSCH repetition to the first TRP according to the first precoding information.

S703: and the terminal equipment determines the sending power of the second PUSCH repetition according to the second group of power control parameters, and sends the second PUSCH repetition to the second TRP according to the second precoding information.

As can be seen from the above, the terminal device may determine two sets of power control parameters according to the scheduling of one DCI. And the repeated transmission power of the first PUSCH and the repeated transmission power of the second PUSCH can be respectively determined according to the two groups of power control parameters, so that the purpose that the PUSCHs sent to different TRPs determine the transmission power through independent power control parameters is realized. The transmission parameters and power of the PUSCH are more adaptive to the channel, the transmission reliability is improved, and the transmission performance is improved.

As shown in fig. 6, a flowchart of an uplink power control method is provided, which may be an example of the above-mentioned flowchart shown in fig. 6 applied to the PUSCH of the uplink configuration grant of type 1. The process comprises the following steps:

s801: the first TRP transmits first configuration information to a UE, where the first configuration information may be a Radio Resource Control (RRC) configured uplink grant (configured uplink grant), or the first configuration information may be a configuration of a configuration grant (configured grant configuration). The first configuration information may be used to instruct the UE to send PUSCH repetitions to at least two TRPs. For example, the UE is instructed to send a first PUSCH repetition to a first TRP, and the UE is instructed to send a second PUSCH repetition to a second TRP.

The first configuration information may include a first parameter, and the first parameter may indicate first precoding information and second precoding information. The first precoding information corresponds to a first PUSCH repetition and the second precoding information corresponds to a second PUSCH repetition. Optionally, the first configuration information may further include a second parameter, and the second parameter may indicate the first set of power control parameters and the second set of power control parameters. Alternatively, the terminal device may select two sets of power control parameters from the power control parameter set according to a predefined manner, and the two sets of power control parameters are respectively used as the first set of power control parameters and the second set of power control parameters.

In one possible implementation, the power control parameter set includes an open-loop power control parameter set composed of (P0, alpha), and a set of path loss reference signal sets. The first configuration information includes a second parameter a, and a second parameter B. Wherein the second parameter a is used to indicate two groups of open-loop power control parameters in the set of open-loop power control parameters, which are the first group of open-loop power control parameters and the second group of open-loop power control parameters, respectively. The second parameter B is used to indicate two sets of path loss reference signals in the set of path loss reference signals, respectively the first set of path loss reference signals and the second set of path loss reference signals. The first set of open-loop power control parameters and the first set of pathloss reference signals may form a first set of power control parameters, i.e., the first set of power control parameters includes { the first set of open-loop power control parameters, the first set of pathloss reference signals }. The second set of open loop power control parameters and the second set of pathloss reference signals may constitute a second set of power control parameters, i.e., the second set of power control parameters includes { the second set of open loop power control parameters, the second set of pathloss reference signals }. Alternatively, the terminal device may determine the first set of open-loop power control parameters and the second set of open-loop power control parameters from the set of open-loop power control parameters according to a predefined rule. Also, according to a predefined rule, in the set of path loss reference signal groups, a first set of path loss reference signals and a second set of path loss reference signals are determined. Finally, a first set of power control parameters is formed by the first set of open loop power control parameters and the first set of path loss reference signals. And forming a second group of power control parameters by the second group of open-loop power control parameters and the second group of path loss reference signals.

S802: and the UE calculates the transmission power of the first PUSCH repetition according to the first group of power control parameters and transmits the first PUSCH repetition according to the first precoding information.

S803: and the UE calculates the sending power of the second PUSCH repetition according to the second group of power control parameters and sends the second PUSCH repetition according to the second precoding information.

In one scheme, a set of configuration grants configures at least two PUSCHs to be repeatedly and respectively sent to different TRPs, but a set of configuration grants can only indicate one set of power control parameters, so that the determined powers of the PUSCHs sent to different TRPs are the same. In the embodiment of the application, two sets of power control parameters are configured for repeated transmission of the PUSCH, so that the PUSCH sent to different TRPs can determine the sending power through the independent power control parameters. The transmission parameters and power of the PUSCH are more adaptive to the channel, the transmission reliability is improved, and the transmission performance is improved.

As shown in fig. 7, a flow of an uplink power control method is provided, which may be an example of the above-mentioned flow shown in fig. 6 applied to the PUSCH of the configuration grant of type 2. The process comprises the following steps:

s901: the first TRP sends first configuration information to the UE, wherein the first configuration information is used for configuring a power control parameter set.

S902: the first TRP transmits DCI to the UE, wherein the DCI is used for indicating the UE to transmit PUSCH repetition to at least two TRPs. For example, the UE is instructed to send a first PUSCH repetition to a first TRP, and the UE is instructed to send a second PUSCH repetition to a second TRP.

In a possible implementation manner, the DCI in S902 may include a first information field, where the first information field is used to indicate first precoding information and second precoding information, the first precoding information corresponds to a first PUSCH repetition, and the second precoding information corresponds to a second PUSCH repetition. The DCI may further include a second information field indicating a first set of power control parameters and a second set of power control parameters, the first set of power control parameters corresponding to the first PUSCH repetition and the second set of power control parameters corresponding to the second PUSCH repetition. Optionally, the second information field may be an SRS resource indication. Alternatively, the second information field may not be included in the DCI, and the terminal device may determine the first set of power control parameters and the second set of power control parameters from the set of power control parameters according to a predefined rule. Alternatively, the first configuration information in S901 may include a first parameter, where the first parameter is used to indicate a first group of power control parameters and a second group of power control parameters. Accordingly, the UE may determine the first set of power control parameters and the second set of power control parameters according to the first parameter in the first configuration information.

S903: and the UE calculates the transmission power of the first PUSCH repetition according to the first group of power control parameters and transmits the first PUSCH repetition according to the first precoding information.

S904: and the UE calculates the sending power of the second PUSCH repetition according to the second group of power control parameters and sends the second PUSCH repetition according to the second precoding information.

In the embodiment of the application, the purpose that the sending power of the PUSCHs sent to different TRPs is determined through independent power control parameters is achieved by configuring repeated transmission of the PUSCHs or indicating two groups of power control parameters. The transmission parameters and power of the PUSCH are more adaptive to the channel, the transmission reliability is improved, and the transmission performance is improved.

It should be noted that the uplink power control method provided in the embodiment of the present application may be used to calculate the transmission power of the PUCCH in addition to the transmission power of the PUSCH repetition, that is, "PUSCH repetition" in the embodiment of the present application may be replaced by "PUCCH repetition". For example, in one particular implementation: the network device may send configuration information to the terminal device, where the configuration information is used to configure two sets of PUCCH power control parameters for the terminal device, which are a first set of PUCCH power control parameters and a second set of PUCCH power control parameters, respectively. The first and second sets of PUCCH group power control parameters may include a base power control parameter P0 and/or a pathloss reference signal group index qd, etc. The terminal equipment can determine the transmission power of the first PUCCH according to the first PUCCH power control parameter, and transmit the first PUCCH repetition to the network equipment according to the transmission power of the first PUCCH; and determining the transmission power of the second PUCCH according to the power control parameter of the second PUCCH, and transmitting the second PUCCH repetition to the network equipment according to the transmission power of the second PUCCH.

In the embodiments provided in the present application, the method provided in the embodiments of the present application is introduced from the perspective of a network device, a terminal device, and interaction between the network device and the terminal device. In order to implement the functions in the method provided by the embodiments of the present application, the network device and the terminal device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

Fig. 8 and 9 are schematic structural diagrams of a possible communication device provided in an embodiment of the present application. The communication devices can realize the functions of the terminal device or the network device in the above method embodiments, and therefore, the beneficial effects of the above method embodiments can also be realized. As shown in fig. 8, the communication apparatus 1000 includes a transceiver module 1001 and a processing module 1002.

In one possible implementation manner, the communication apparatus 1000 is configured to implement the functions of the terminal device in the flow illustrated in fig. 4. For example, the transceiver module 1001 is configured to receive first indication information from a network device, where the first indication information indicates first precoding information and second precoding information, the first precoding information corresponds to a first physical uplink shared channel, PUSCH, repetition, and the second precoding information corresponds to a second PUSCH repetition; a processing module 1002, configured to determine a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information; the processing module 1002 is further configured to determine a first transmission power according to the first group of power control parameters, control the transceiver module 1001 to transmit the first PUSCH repetition according to the first transmission power and the first precoding information, determine a second transmission power according to the second group of power control parameters, and control the transceiver module 1001 to transmit the second PUSCH repetition according to the second transmission power and the second precoding information.

Optionally, the transceiver module 1001 is further configured to receive second indication information from a network device, where the second indication information indicates a first group of power control parameters and a second group of power control parameters, and when determining that the first group of power control parameters corresponding to the first precoding information and the second group of power control parameters corresponding to the second precoding information, the processing module 1002 specifically includes: and according to the second indication information, determining a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in a power control parameter set.

Optionally, when determining the first group of power control parameters corresponding to the first precoding information and the second group of power control parameters corresponding to the second precoding information, the processing module 1002 specifically includes: and according to a preset rule, determining a first group of power control parameters corresponding to the first precoding information and a second group of power control parameters corresponding to the second precoding information in a power control parameter set.

Optionally, the preset rule includes: the first group of power control parameters and the second group of power control parameters are two groups of power control parameters with the smallest index in the power control parameter set respectively.

Optionally, the set of power control parameters includes at least one of the following sets: the method comprises the steps of a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set and a closed-loop accumulated process number set, wherein the PUSCH open-loop power control parameter set comprises one or more groups of open-loop power control parameters consisting of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set comprises indexes qd of one or more path loss reference signals, and the closed-loop accumulated process number set comprises one or more closed-loop accumulated process numbers l.

Optionally, the first indication information further indicates the first set of power control parameters and the second set of power control parameters.

Optionally, the first set of power control parameters and the second set of power control parameters include at least one of: a base power control parameter P0 and a path loss compensation factor alpha; an index qd of the set of path loss reference signals; and a closed loop cumulative process number l.

In another possible implementation manner, the communication apparatus 1000 is used to implement the functions of the network device in the flow shown in fig. 4. For example, the communication module 1001 is configured to send, to a terminal device, first indication information, where the first indication information is used to indicate first precoding information and second precoding information, where the first precoding information corresponds to a first set of power control parameters for a first PUSCH repetition, and the second precoding information corresponds to a second set of power control parameters for a second PUSCH repetition; a processing module 1002, configured to control the communication module 1001 to receive the first PUSCH repetition from the terminal device using the first precoding information.

Optionally, the communication module 1001 is further configured to: and sending second indication information to the terminal equipment, wherein the second indication information indicates the first group of power control parameters and the second group of power control parameters in the power control parameter set.

Optionally, the processing module 1002 is further configured to determine, according to a preset rule, a first group of power control parameters corresponding to the first precoding information in a power control parameter set.

Optionally, the preset rule includes: any one of the two sets of power control parameters with the smallest index in the first set of power control parameters is the first set of power control parameters.

Optionally, the set of power control parameters includes at least one of the following sets: the method comprises the steps of a PUSCH open-loop power control parameter set, a PUSCH path loss reference signal set and a closed-loop accumulated process number set, wherein the PUSCH open-loop power control parameter set comprises one or more groups of open-loop power control parameters consisting of a basic power control parameter P0 and a path loss compensation factor alpha, the PUSCH path loss reference signal set comprises indexes qd of one or more path loss reference signals, and the closed-loop accumulated process number set comprises one or more closed-loop accumulated process numbers l.

Optionally, the first indication information further indicates the first set of power control parameters and the second set of power control parameters.

Optionally, the first set of power control parameters and the second set of power control parameters include at least one of: a base power control parameter P0 and a path loss compensation factor alpha; an index qd of the set of path loss reference signals; and a closed loop cumulative process number l.

For a more detailed description of the transceiver module 1001 and the processing module 1002, reference may be made to the related description of the above method embodiment, and no further description is provided here.

As shown in fig. 9, the communication device 1100 includes a processor 1111 and an interface circuit 1120. The processor 1111 and the interface circuit 1120 are coupled to each other. It is understood that the interface circuit 1120 may be a transceiver or an input-output interface. Optionally, the communication device 1100 may further include a memory 1130 for storing instructions to be executed by the processor 1111 or for storing input data required by the processor 1111 to execute the instructions or for storing data generated by the processor 1111 after executing the instructions.

When the communication device 1100 is configured to implement the method in the above method embodiments, the processor 1111 is configured to perform the functions of the processing module 1002, and the interface circuit 1120 is configured to perform the functions of the transceiver module 1001.

When the communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above 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 communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above 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; alternatively, the network device chip sends information to other modules (such as a radio frequency module or an antenna) in the network device, and 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, Erasable PROM (EPROM), Electrically EPROM (EEPROM), registers, a hard disk, a removable hard 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 an access network device or a terminal device. Of course, the processor and the storage medium may reside as discrete components in an access 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, a hard disk, a 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 description of the text of the present application, the character "/" generally indicates that the former and latter 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". Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

In addition, the network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario. 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.