CN117998554A

CN117998554A - Method and device for determining uplink transmission power

Info

Publication number: CN117998554A
Application number: CN202211378449.2A
Authority: CN
Inventors: 徐军; 金黄平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2024-05-07
Also published as: WO2024093906A1

Abstract

The application provides a method and a device for determining uplink transmission power, wherein the method comprises the following steps: the terminal equipment receives first information from the network equipment, wherein the first information is used for indicating M antenna ports with non-zero power in N antenna ports of the terminal equipment, M and N are positive integers, and M is smaller than or equal to N; the terminal device transmits uplink data to the network device at a first power value, which is determined based on the target transmission power value and a maximum transmission power value of each of the M antenna ports. That is, the first power value considers the transmitting power capability of each antenna port, and improves the transmitting power of the terminal device as much as possible in the capability range, thereby effectively reducing the requirement on the hardware of the terminal device and the complexity of the processing of the terminal device, and enabling the application of the terminal device with low cost.

Description

Method and device for determining uplink transmission power

Technical Field

The present application relates to the field of communication technologies, and in particular, to a method and apparatus for determining uplink transmission power.

Background

With the application of the multi-antenna port technology, a terminal device may transmit data using multiple antenna ports. For example, the network device may determine an uplink precoding matrix based on the channel information and indicate the uplink precoding matrix to the terminal device, based on which the terminal device may learn through which antenna port or ports to transmit data. When the terminal device transmits uplink data, it is necessary to determine a power value for transmitting the uplink data in addition to knowing the number of antenna ports for transmitting the data.

At present, rules for determining uplink transmission power values by multiple terminal devices are specified in a third generation partnership project (3rd Generation Partnership Project,3GPP) communication protocol, but in order to improve the power of uplink data transmitted by the terminal devices, the rules have higher requirements on hardware of the terminal devices, for example 3GPP TS 38.214V16.7.0 define multiple full power modes, wherein full power mode 0 requires a power amplifier of each antenna port of the terminal device to support full power transmission, full power mode 1 requires the terminal device to execute operations such as cyclic delay diversity and the like to compensate channel loss in order to improve uplink transmission power, uplink power control rules in full power mode 2 require the terminal device to report a precoding matrix supporting full power transmission, and occupy additional Sounding REFERENCE SIGNAL (SRS) resources for the precoding matrix which is not reported to improve transmission power. Therefore, there is a need for a method and apparatus for determining uplink transmission power, which can increase uplink transmission power of a terminal device, and simultaneously reduce requirements on the terminal device or reduce complexity of processing of the terminal device.

Disclosure of Invention

The application provides a method and a device for determining uplink transmission power, which can reduce the requirement on terminal equipment or the complexity of processing the terminal equipment while improving the uplink transmission power of the terminal equipment.

In a first aspect, a method for determining uplink transmit power is provided, which may be performed by a terminal device or a chip in the terminal device. The terminal device has N antenna ports, and the method includes: the terminal equipment receives first information from the network equipment, wherein the first information is used for indicating M antenna ports with non-zero power in N antenna ports, M and N are positive integers, and M is smaller than or equal to N; the terminal device transmits uplink data to the network device at a first power value, which is determined based on the target transmission power value and a maximum transmission power value of each of the M antenna ports.

Based on the technical scheme, the network device indicates the antenna ports with non-zero power of the terminal device, the terminal device can determine uplink transmission power based on the target transmission power value and the maximum transmission power value of each antenna port, the uplink transmission power is not simply determined according to the number of the non-zero antenna ports and the total number of the antenna ports, the transmission power capacity of each antenna port is considered, the power of the terminal device for transmitting uplink data is improved as much as possible in the capacity range, the terminal device does not need to support transmission with the target power value in each antenna port, and operations such as cyclic delay diversity and the like are not needed to be executed for improving the uplink transmission power, so that the requirements on the hardware of the terminal device and the complexity of processing of the terminal device are effectively reduced, and the application of the terminal device with low cost is enabled.

The non-zero power antenna port may also be referred to as a non-zero power port and may refer to an antenna port for transmitting data.

Optionally, the target transmit power value is determined based on the number of physical resource blocks used to transmit the data and/or the full path loss parameter.

The target transmission power value may refer to: if the terminal device transmits upstream data to the network device at the target transmission power value, the network device can receive the upstream data at the expected power value.

With reference to the first aspect, in certain implementations of the first aspect, the first power value is less than or equal to a minimum value of the maximum transmit power values for each of the M antenna ports multiplied by M.

Based on the technical scheme, if the first power value is equally distributed to M non-zero power ports, the transmission power obtained by any non-zero power port does not exceed the maximum transmission power value of the non-zero power port. Therefore, based on the first power value determined by the implementation manner, any non-zero antenna port cannot be overloaded, damage to the antenna port caused by overload operation is avoided, and the reliability of data transmission of the terminal equipment can be improved.

It should be noted that, in the existing power control rule, the hardware design of the antenna ports is designed based on the power control rule, for example, the transmission power in the protocol 3GPP TS 38.213V15.15.0 is equal to the target transmission power value multiplied by (N/M), if the network device instructs the terminal device to transmit data using 2 antenna ports out of the 4 antenna ports, the transmission power value of each antenna port is 0.25×the target power value, that is, when designing the antenna ports, it is necessary to guarantee that the maximum transmission power value of each antenna port of the terminal device is greater than or equal to 0.25×the target power value in hardware. In the method for determining the uplink transmission power provided by the implementation manner, the determination of the first power value is based on the capability of the antenna port, and the first power value does not enable the transmission power of the antenna port to be greater than the maximum transmission power. Therefore, the method provided by the embodiment of the application reduces the limitation on the hardware of the terminal equipment. That is, in the power control rule of the existing protocol, the transmission power is mainly determined based on the transmission power expected by the network device, and the design of the hardware of the terminal device needs to take the power control rule as a premise.

With reference to the first aspect, in certain implementations of the first aspect, the first coefficient is equal to 1 in a case where the first value is greater than or equal to 1, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the first aspect, in certain implementations of the first aspect, the first coefficient is equal to the first value in a case where the first value is less than 1, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

Based on the technical scheme, the first power value can be determined based on the maximum transmission power of M antenna ports with non-zero power.

With reference to the first aspect, in certain implementations of the first aspect, the first power value is equal to the target transmit power value multiplied by a first coefficient, the first coefficient α being:

Wherein i is more than or equal to 1 and less than or equal to N, delta _i is used for indicating whether the ith antenna port in the N antenna ports is a non-zero power antenna port; in the case where the i-th antenna port is a non-zero power antenna port, δ _i =1; in the case where the i-th antenna port is not a non-zero power antenna port, δ _i＝0;p_i is the capability coefficient of the i-th antenna port of the N antenna ports, and p _i is equal to the ratio of the maximum transmission power value of the i-th antenna port to the target transmission power value.

Wherein j is more than or equal to 1 and less than or equal to M, p _j is the capacity coefficient of the j-th antenna port in the M antenna ports, and p _j is equal to the ratio of the maximum transmission power value of the j-th antenna port to the target transmission power value.

Optionally, the first power value P is:

Wherein P _min is the minimum value of the maximum transmit powers of the M non-zero power antenna ports.

With reference to the first aspect, in some implementations of the first aspect, the first information is carried in downlink control information DCI.

Optionally, the first information includes a transmit precoding matrix indicator (TRANSMITTED PRECODING MATRIX INDICATOR, TPMI) and a transport layer number.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device sends capability information to the network device, the capability information indicating a maximum transmission power value of each of the N antenna ports, the capability information being used to determine the first information.

Based on the technical scheme, the capability information can be used for the network equipment to determine the first information, so that the network equipment can select M antenna ports based on the first information, and the reliability of data transmission is improved.

In a second aspect, a method for determining uplink transmit power is provided, which may be performed by a network device or a chip in the network device. The method comprises the following steps: the network equipment sends first information to the terminal equipment, wherein the first information is used for indicating M antenna ports with non-zero power in N antenna ports of the terminal equipment, M and N are positive integers, and M is smaller than or equal to N; the network device receives uplink data from the terminal device, and the transmission power value of the uplink data is a first power value, where the first power value is determined based on the target transmission power value and a maximum transmission power value of each of the M antenna ports.

Various implementations in the second aspect are methods corresponding to the various implementations in the first aspect, and the description of the advantageous effects of the second aspect may be referred to in the description of the first aspect.

With reference to the second aspect, in certain implementations of the second aspect, the first power value is less than or equal to a minimum value of the maximum transmit power values for each of the M antenna ports multiplied by M.

With reference to the second aspect, in certain implementations of the second aspect, the first coefficient is equal to 1 in a case where the first value is greater than or equal to 1, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the second aspect, in certain implementations of the second aspect, in a case where the first value is less than 1, the first coefficient is equal to the first value, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the second aspect, in certain implementations of the second aspect, the first power value is equal to the target transmit power value multiplied by a first coefficient, and the first coefficient α is:

With reference to the second aspect, in some implementations of the second aspect, the first information is carried in downlink control information DCI.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network device receives capability information from the terminal device, the capability information indicating a maximum transmission power value of each of N antenna ports of the terminal device, the first information being determined based on the capability information.

In a third aspect, an apparatus for determining uplink transmit power is provided, where the apparatus includes a transceiver unit and a processing unit, where the transceiver unit is configured to receive first information from a network device, the first information is used to indicate M antenna ports with non-zero power from N antenna ports of the apparatus, M and N are both positive integers, and M is less than or equal to N; a processing unit configured to determine a first power value based on the target transmission power value and a maximum transmission power value of each of the M antenna ports; and the receiving and transmitting unit is also used for transmitting the uplink data to the network equipment at the first power value.

Various implementations in the third aspect are apparatuses for determining uplink transmission power corresponding to various implementations in the first aspect, and for description of advantageous effects of the third aspect, reference may be made to the description in the first aspect.

With reference to the third aspect, in certain implementations of the third aspect, the first power value is less than or equal to a minimum value of the maximum transmit power values for each of the M antenna ports multiplied by M.

With reference to the third aspect, in some implementations of the third aspect, the first coefficient is equal to 1 in a case where the first value is greater than or equal to 1, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the third aspect, in some implementations of the third aspect, the first coefficient is equal to the first value in a case where the first value is less than 1, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the third aspect, in certain implementations of the third aspect, the first power value is equal to the target transmit power value multiplied by a first coefficient, and the first coefficient α is:

With reference to the third aspect, in certain implementations of the third aspect, the first power value is equal to the target transmit power value multiplied by a first coefficient, a being:

With reference to the third aspect, in some implementations of the third aspect, the first information is carried in downlink control information DCI.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to send capability information to the network device, where the capability information indicates a maximum transmission power value of each of the N antenna ports, and the capability information is used to determine the first information.

In a fourth aspect, an apparatus for determining uplink transmit power is provided, where the apparatus includes a transceiver unit and a processing unit, where the processing unit is configured to generate first information, where the first information is used to indicate M antenna ports with non-zero power from N antenna ports of a terminal device, M and N are both positive integers, and M is less than or equal to N; the receiving and transmitting unit is used for transmitting the first information to the terminal equipment; and the receiving and transmitting unit is also used for receiving uplink data from the terminal equipment, wherein the transmission power value of the uplink data is a first power value, and the first power value is determined based on the target transmission power value of the uplink data and the maximum transmission power value of each antenna port in the M antenna ports.

Various implementations in the fourth aspect are the apparatus for determining uplink transmission power corresponding to various implementations in the second aspect, and for description of the advantageous effects of the fourth aspect, reference may be made to the description in the second aspect.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first power value is less than or equal to a minimum value of the maximum transmit power values for each of the M antenna ports multiplied by M.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first coefficient is equal to 1 in a case where the first value is greater than or equal to 1, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the fourth aspect, in some implementations of the fourth aspect, in a case where the first value is less than 1, the first coefficient is equal to the first value, where the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M to the target transmission power value, and the first power value is equal to the target transmission power value multiplied by the first coefficient.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first power value is equal to the target transmit power value multiplied by a first coefficient, and the first coefficient α is:

With reference to the fourth aspect, in some implementations of the fourth aspect, the first information is carried in downlink control information DCI.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to receive capability information from the terminal device, where the capability information indicates a maximum transmit power value of each of N antenna ports of the terminal device, and the first information is determined according to the capability information.

In a fifth aspect, a communication device is provided comprising respective modules or units for performing the methods of the first to second aspects and any one of the possible implementations of the first to second aspects.

In a sixth aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the first aspect and any one of the possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication means is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal device. When the communication means is a chip configured in the terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input/output interface may be an input/output circuit.

In a seventh aspect, a communication device is provided that includes a processor. The processor is coupled to the memory and operable to execute instructions in the memory to implement the method of the second aspect and any one of the possible implementations of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, and the processor is coupled to the communication interface.

In one implementation, the communication apparatus is a network device. When the communication means is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network apparatus, the communication interface may be an input/output interface.

In an eighth aspect, there is provided a processor comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and to transmit a signal via the output circuit, such that the processor performs the method of the first aspect to the second aspect and any one of the possible implementations of the first aspect to the second aspect.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the output signal may be output by, for example and without limitation, a transmitter and transmitted by a transmitter, and the input circuit and the output circuit may be the same circuit, which functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the application does not limit the specific implementation modes of the processor and various circuits.

In a ninth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and is configured to receive a signal via the receiver and to transmit a signal via the transmitter to perform the method of the first aspect to the second aspect and any one of the possible implementations of the first aspect to the second aspect.

Optionally, the processor is one or more and the memory is one or more.

Alternatively, the memory may be integrated with the processor or the memory may be separate from the processor.

In a specific implementation process, the memory may be a non-transient (non-transitory) memory, for example, a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It should be appreciated that the related data interaction process, for example, transmitting the indication information, may be a process of outputting the indication information from the processor, and the receiving the capability information may be a process of receiving the input capability information by the processor. Specifically, the data output by the processing may be output to the transmitter, and the input data received by the processor may be from the receiver. Wherein the transmitter and receiver may be collectively referred to as a transceiver.

The processing means in the ninth aspect may be a chip, the processor may be implemented by hardware or may be implemented by software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, implemented by reading software code stored in a memory, which may be integrated in the processor, or may reside outside the processor, and exist separately.

In a tenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) which, when executed, causes a computer to perform the method of the first to second aspects and any one of the possible implementations of the first to second aspects.

In an eleventh aspect, a computer readable storage medium is provided, the computer readable storage medium storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of the first to second aspects and any one of the possible implementations of the first to second aspects.

In a twelfth aspect, a communication system is provided, comprising the aforementioned terminal device and network device.

Drawings

Fig. 1 is a schematic diagram of a communication system adapted to an uplink transmission power determining method according to an embodiment of the present application;

fig. 2 is a schematic flowchart of an uplink transmission power determining method provided by an embodiment of the present application;

Fig. 3 is a schematic block diagram of an apparatus for determining uplink transmission power according to an embodiment of the present application;

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

fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical scheme of the application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, such as: long term evolution (Long Term Evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, fifth generation (5th Generation,5G) mobile communication system, or new radio access technology (NR). The 5G mobile communication system may include a non-independent networking (non-standalone, NSA) and/or an independent networking (standalone, SA), among others. The technical scheme of the embodiment of the application can also be applied to future communication systems, such as a sixth generation mobile communication system and the like.

The technical scheme provided by the application can be applied to various application scenes, such as: machine-type communication (MACHINE TYPE communication, MTC), inter-machine communication long term evolution (LTE-M) technology (Long Term Evolution-machine), device-to-device (D2D) network, machine-to-machine (machine to machine, M2M) network, internet of things (internet of things, ioT) network, or other networks. The IoT network may include, for example, an internet of vehicles. The communication modes in the internet of vehicles system are generally called as vehicle to other devices (V2X, X may represent anything), for example, the V2X may include: vehicle-to-vehicle (vehicle to vehicle, V2V) communication, vehicle-to-infrastructure (vehicle to infrastructure, V2I) communication, vehicle-to-pedestrian communication (vehicle to pedestrian, V2P) or vehicle-to-network (vehicle to network, V2N) communication, etc.

In the embodiment of the application, the network device can be any device with a wireless receiving and transmitting function. The apparatus includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIRELESS FIDELITY, wiFi) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP or TP), one or a group (including multiple antenna panels) of base stations in a 5G system, or may also be a network Node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a centralized unit (centralized unit, CU) and DUs. The gNB may also include an active antenna unit (ACTIVE ANTENNA units, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB, e.g. the CU is responsible for handling non-real time protocols and services, implementing radio resource control (radio resource control, RRC), packet data convergence layer protocol (PACKET DATA convergence protocol, PDCP) layer functions. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC) layer, medium access control (medium access control, MAC) layer, and Physical (PHY) layer. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. Since the information of the RRC layer may be eventually changed into or converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+aau. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which the present application is not limited to.

The network device provides services for the cell, and the terminal device communicates with the cell through transmission resources (e.g., frequency domain resources, or spectrum resources) allocated by the network device, where the cell may belong to a macro base station (e.g., macro eNB or macro gNB, etc.), or may belong to a base station corresponding to a small cell (SMALL CELL), where the small cell may include: urban cells (metro cells), micro cells (micro cells), pico cells (pico cells), femto cells (femto cells) and the like, and the small cells have the characteristics of small coverage area and low transmitting power and are suitable for providing high-rate data transmission services.

In the embodiment of the present application, the terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment.

The terminal device may be a device providing voice/data connectivity to a user, e.g., a handheld device with wireless connectivity, an in-vehicle device, etc. Currently, some examples of terminals may be: a mobile phone (mobile phone), a tablet (pad), a computer with wireless transceiver function (such as a notebook, a palm computer, etc.), a mobile internet device (mobile INTERNET DEVICE, MID), a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in telemedicine (remote media), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in smart city (SMART CITY), or a future evolution network (public network public land mobile network, etc.).

The wearable device can also be called as a wearable intelligent device, and is a generic name for intelligently designing daily wearing and developing wearable devices by applying a wearable technology, such as glasses, gloves, watches, clothes, shoes and the like. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart jewelry, etc. for physical sign monitoring.

The terminal device may also be a terminal device in an internet of things (internet of things, ioT) system. IoT is an important component of future information technology development, and its main technical feature is to connect an item with a network through a communication technology, so as to implement man-machine interconnection and an intelligent network for object interconnection. IoT technology can enable massive connectivity, deep coverage, and terminal power saving through, for example, narrowband NB technology.

In addition, the terminal device may further include sensors such as an intelligent printer, a train detector, and a gas station, and the main functions include collecting data (part of the terminal device), receiving control information and downlink data of the network device, and transmitting electromagnetic waves to transmit uplink data to the network device.

To facilitate understanding of the embodiments of the present application, a communication system suitable for the method provided in the embodiment of the present application will be described in detail with reference to fig. 1.

Fig. 1 shows a schematic diagram of a communication system 100 suitable for use in the method provided by an embodiment of the application. As shown, the communication system 100 may include at least one network device, such as network device 101 in the 5G system shown in fig. 1; the communication system 100 may also comprise at least one terminal device, such as the terminal devices 102 to 107 shown in fig. 1. Wherein the terminal devices 102 to 107 may be mobile or stationary. One or more of network device 101 and terminal devices 102-107 may each communicate over a wireless link. Each network device may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. For example, the network device may send configuration information to the terminal device, and the terminal device may send uplink data to the network device based on the configuration information; as another example, the network device may send downstream data to the terminal device. For another example, the network device may calculate the number of streams and uplink precoding for uplink transmission by the terminal device, and indicate the number of streams and uplink precoding to the terminal device through downlink information. Thus, the network device 101 and the terminal devices 102 to 107 in fig. 1 constitute one communication system.

Alternatively, the terminal devices may communicate directly with each other. Direct communication between the terminal devices may be achieved, for example, using D2D technology or the like. As shown in the figure, communication may be directly performed between the terminal devices 105 and 106 and between the terminal devices 105 and 107 using D2D technology. Terminal device 106 and terminal device 107 may communicate with terminal device 105 separately or simultaneously.

Terminal devices 105 to 107 may also communicate with network device 101, respectively. For example, may communicate directly with network device 101, as terminal devices 105 and 106 in the figures may communicate directly with network device 101; or indirectly with the network device 101, as in the figure the terminal device 107 communicates with the network device 101 via the terminal device 106.

It should be appreciated that fig. 1 illustrates schematically one network device and a plurality of terminal devices, as well as communication links between the communication devices. Alternatively, the communication system 100 may include a plurality of network devices, and the coverage area of each network device may include other numbers of terminal devices, such as more or fewer terminal devices. The application is not limited in this regard.

When the communication system 100 includes a plurality of network devices, the terminal device in the coverage area of each network device may send uplink data to any network device, or may send uplink data to a plurality of network devices. For example, uplink data sent by terminal devices in areas adjacent to coverage areas of two network devices may be received by one of the two network devices, or may be jointly received by the two network devices.

Each of the above-described communication apparatuses, such as the network apparatus 101 and the terminal apparatuses 102 to 107 in fig. 1, may be configured with a plurality of antennas. The plurality of antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device may additionally include a transmitter chain and a receiver chain, each of which may include a plurality of components (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.) associated with the transmission and reception of signals, as will be appreciated by one skilled in the art. Thus, communication between the network device and the terminal device may be via multiple antenna technology.

Optionally, the wireless communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited thereto according to the embodiments of the present application.

In order to facilitate understanding of the embodiments of the present application, some technical terms related to the embodiments of the present application are briefly described below.

(1) Antenna port (antenna port)

The antenna ports may be simply referred to as ports. The antenna ports include a transmitting antenna port (or, as the case may be, a transmitting antenna port) and a receiving antenna port. The transmit antenna port may be understood as a transmit antenna that can be identified by the receiving party or a spatially distinguishable transmit antenna.

In a scenario where the terminal device sends a signal to the network device, the sending antenna port may refer to an antenna port of the terminal device, and the receiving antenna port may refer to an antenna port of the network device.

In the embodiment of the application, an antenna port for transmitting data by the terminal device is described as a transmitting antenna port of the terminal device. The number of the transmitting antenna ports of the terminal device is not particularly limited, for example, 2,4,8,16, 32. The power at which each antenna port transmits data cannot exceed the limit of the antenna port power amplifier, which may also be referred to as the maximum transmit power value for that antenna port.

(2) Precoding technique

The transmitting device can process the transmitted signal by means of the precoding matrix matched with the channel state under the condition that the channel state is known, so that the precoded signal to be transmitted is matched with the channel, and the complexity of eliminating the influence among the channels by the receiving device is reduced. In the uplink transmission, the sending device may be a terminal device, and the receiving device may be a network device. By precoding the transmitted signal, the received signal quality (e.g., signal to interference plus noise ratio (signal to interference plus noise ratio, SINR), etc.) is improved. Therefore, by adopting the precoding technology, the transmission of the sending device and the plurality of receiving devices on the same time-frequency resource can be realized, namely, the multi-user multiple-input multiple-output (multiple user multiple input multiple output, MU-MIMO) is realized. It should be understood that the description herein of the precoding technology is merely exemplary for easy understanding, and is not intended to limit the scope of the embodiments of the present application. In a specific implementation process, the sending device may also perform precoding in other manners. For example, when channel information (such as, but not limited to, a channel matrix) cannot be known, precoding is performed using a pre-set precoding matrix or a weighting method. For brevity, the details thereof are not described in detail herein.

(3) Coherence capability of terminal equipment

The coherence capability of the terminal equipment includes incoherence (non-coherence), partial coherence (partial coherence) or full coherence (full coherence). The incoherence refers to that the terminal equipment can only transmit uplink data through one antenna port in the multiple transmitting antenna ports at one moment, and can be described as incoherence among the multiple transmitting antenna ports. Partial coherence refers to that the terminal device may transmit uplink data through a portion (at least two) of the multiple transmit antenna ports at the same time, and may be described as partial coherence between the multiple transmit antenna ports. Full coherence refers to the fact that a terminal device may transmit uplink data through all of the multiple transmit antenna ports at the same time, and may be described as being fully coherent among the multiple transmit antenna ports.

(4) Codebook and codeword

The network device typically estimates channel information of a wireless channel between the terminal device and the network device according to a reference signal, such as a Sounding REFERENCE SIGNAL (SRS), sent by the terminal device and used for measuring an uplink channel. After the network device calculates the precoding matrix and the number of transmission layers according to the channel information, a codeword closest to the calculated precoding matrix may be selected in a codebook, and an index of the codeword and the number of transmission layers may be indicated to the terminal device, where the index of the codeword may be an indication (TRANSMITTED PRECODING MATRIX INDICATOR, TPMI) of the transmission precoding matrix, and the number of transmission layers is an index stream or a space stream.

A codebook may include a plurality of predefined codewords, and codewords in the same codebook correspond to the same number of transmit antenna ports and number of transmission layers. To facilitate an understanding of embodiments of the present application, a codebook defined by the third generation partnership project (3rd Generation Partnership Project,3GPP) standard, such as a partial codebook defined in the 3GPP technical standard (TECHNICAL SPECIFICATION, TS) 38.211V16.7.0 protocol, is exemplified below.

Referring to table 1, table 1 is a codebook having an antenna port number of 4 and a transmission layer number of 1. The codebook contains 28 codewords, tpmi=0-27 for indexing the 28 codewords, respectively. Each codeword in the codebook of 4 antenna port numbers and 1 transmission layer number is a matrix of 4 rows and 1 column, and consists of 4 elements of non-zero elements (real numbers 1, -1, imaginary numbers j or-j) and zero elements. The coherence capability of the terminal device may be determined based on the number of non-zero elements in the codeword, for example, if there is only one non-zero element in the codeword, there is no coherence between the 4 antenna ports corresponding to the codeword, such as a codeword with tpmi=0-3. If the number of non-zero elements in the codeword is greater than 1 and less than the number of antenna ports 4, the codeword is partially coherent between the 4 antenna ports corresponding to the codeword, for example, a codeword with tpmi=4-11. If the number of non-zero elements in the codeword is equal to 4, i.e. the elements in the codeword are all non-zero elements, the 4 antenna ports corresponding to the codeword are completely coherent, for example, a codeword with tpmi=12-27.

TABLE 1

Referring to table 2, table 2 is a codebook with the number of antenna ports of 4 and the number of transmission layers of 2. The codebook includes 22 codewords, tpmi=0-21 for indexing the 22 codewords, respectively. Each codeword in the codebook of 4 antenna port numbers and 2 transmission layers is a matrix of 4 rows and 2 columns, and consists of 4 elements of non-zero elements (real numbers 1, -1, imaginary numbers j or-j) and zero elements. The coherence capability of the terminal device may be determined based on the number of non-zero elements in each column of the codeword, for example, if there is only one non-zero element in each column of the codeword, there is no coherence between the 4 antenna ports corresponding to the codeword, such as a codeword with tpmi=0-5. If the number of non-zero elements in each column of the codeword is greater than 1 and less than the number of antenna ports 4, the 4 antenna ports corresponding to the codeword are partially coherent, for example, a codeword with tpmi=6-13. If the number of non-zero elements in each column of the codeword is equal to 4, i.e., each column of elements in the codeword is a non-zero element, the 4 antenna ports corresponding to the codeword are completely coherent, for example, a codeword with tpmi=14-21.

TABLE 2

It should be understood that the descriptions in tables 1 and 2 above are for facilitating understanding of the following embodiments, and the number of antenna ports and the number of transmission layers are not particularly limited in the present application. The network device may indicate TPMI and the number of transmission layers to the terminal device, so that the terminal device may send uplink data through the antenna ports based on the TPMI and the number of transmission layers, and illustratively, the network device indicates a codeword of tpmi=1 and number of transmission layers=1 in table 1 to the terminal device, and then the terminal device may send data using the 2 nd antenna port of the 4 antenna ports. When the terminal device transmits data, it is necessary to determine a power value for transmitting data in addition to knowing the number of antenna ports for transmitting data.

In the embodiment of the present application, the antenna port for transmitting data is also referred to as a non-zero power port, for example, the terminal device uses 2 antenna ports among 4 antenna ports to transmit data, where the 2 antenna ports are non-zero power ports. The power value at which the terminal device transmits data is the sum of the power values of one or more non-zero power antenna ports. In the existing protocol, the network device estimates uplink channel information according to SRS transmitted by the terminal device, and selects an optimal codeword according to the estimated uplink channel information. When the terminal device transmits the SRS, different SRS ports use the same transmission power, so that the transmission power of each antenna port in the one or more non-zero power antenna ports used in uplink data transmission is the same. That is, the transmission power value of the terminal device transmission data is equal to the product of the transmission power value of one non-zero power port and the number of non-zero ports. Various power control rules are currently defined in the protocol, and in order to facilitate understanding of the embodiments of the present application, the power control rules set forth in protocol 3GPP TS 38.213V15.15.0 and protocol 3GPP TS 38.214V16.7.0 are described below, respectively.

The 3GPP TS 38.213V15.15.0 protocol specifies that when the terminal device uses one codeword to perform precoding transmission on data, the transmission power P of the terminal device is:

P＝P₀×s，s＝Y/Z

Wherein P ₀ is a target power value, s is a power scaling factor, Y is the number of non-zero power ports corresponding to the codeword, and Z is the total number of ports corresponding to the codeword. The target power value P ₀ refers to: if the terminal device transmits data to the network device at the target power value, the network device can receive the data at the expected power value. The terminal device may calculate the target power P ₀ based on a power control formula in the prior art, where main parameters in the power control formula include the number of Resource Blocks (RBs) and a full path loss compensation factor, for example, if the more RBs are occupied by data, the larger the transmission power value expected by the network device, and if the path loss between the terminal device and the network device is larger, the larger the transmission power value expected by the network device is. For more specific meaning in the power control formula, reference may be made to the description in the protocol 3GPP TS 38.213V15.15.0, which is not repeated here.

The terminal device may be said to transmit data at full power if it transmits data to the network device at the target power value P ₀, and may be said to transmit data at not full power if it transmits data to the network device at less than the target power value P ₀. It can be seen that, since the power scaling factor is the ratio of the number of non-zero power ports to the total number of ports, i.e. only if the number of non-zero power ports is equal to the total number of transmit antenna ports, the terminal device can transmit data at full power.

For example, for the codeword corresponding to tpmi=0 in table 1, the number of non-zero power ports corresponding to the codeword is 1, and the total number of ports is 4, that is, the power value of the terminal device transmitting data is 1/4P ₀. For the codeword corresponding to tmpi=8 in table 1, the number of non-zero power ports corresponding to the codeword is 2, and the total number of ports is 4, that is, the power value of the terminal device transmitting data is 1/2P ₀.

Based on the power control rule specified by 3GPP TS 38.213V15.15.0, the terminal device can only transmit data with non-full power for the code words with the number of non-zero power ports being smaller than the total number of ports, so that the reliability of data transmission is lower.

In order to improve the reliability of data transmission, the 3GPP TS 38.213V16.7.0 protocol specifies three modes of power control rules to increase the transmission power of the terminal device: full power mode 0 (fullpower), full power mode1 (fullpowerMode 1) and full power mode2 (fullpowerMode 2).

The power control rule of the full power mode 0 specifies that the power scaling factor s is constant to be 1, that is, the transmission power of the terminal device corresponding to each codeword for transmitting data is equal to the target power value p=p ₀. The power control rule enables the terminal device to transmit data at a target power using any one or more antenna ports, thereby requiring a Power Amplifier (PA) of each antenna port of the terminal device to support data transmission at the target power value, which hardware limitation increases the manufacturing cost of the terminal device.

The power control rule of the full power mode 1 does not change the calculation rule of the power scaling coefficient s in 3GPP TS 38.213V15.15.0, namely, still takes the quotient of the non-zero power port number corresponding to the code word and the total port number, but adds some code words supporting full power transmission, so that the transmission power corresponding to the newly added code word is the target power. An exemplary description is given with codeword indications defined in 3GPP TS 38.212V16.7.0 protocol, see table 3. A 1-layer full-coherent codeword (tpmi=13, tpmi=12, tpmi=14, tpmi=15) is added to the partial coherent and incoherent columns (codebooksubset = partialandnoncoherent), and a 1-layer full-coherent codeword (tpmi=13), a 2-layer full-coherent codeword (tpmi=6), and a 3-layer full-coherent codeword (tpmi=1) are added to the incoherent column (codebooksubset = noncoherent).

Table 3:

Illustratively, if the network device calculates the codeword with the best performance as the number of transmission layers 1 in table 1: tpmi=0, and since the transmission power corresponding to the codeword has only a target power value of 1/4, the network device instructs the terminal device to base on the number of 1 transmission layers newly added in the codebook subset: tpmi=13, and the terminal device transmits data at the target power value based on the codeword.

It can be seen that, based on the power control rule specified in full power mode 1, in order for the network device to increase the transmission power of the terminal device, if the optimal codeword selected based on the channel information cannot transmit data at the target power, the network device indicates the codeword capable of transmitting data at the target power to the terminal device. However, since the indicated codeword is not the codeword with the calculated optimal performance, the performance of the terminal device transmitting data may be lost. To compensate for this loss, the terminal device needs to employ a mode such as small delay cyclic delay diversity (SMALL DELAY CYCLIC DELAY DIVERSITY). That is, based on the power control rule specified in the full power mode 1, the complexity of the terminal device processing is increased while the power of the terminal device transmitting data is increased.

The power control rules in full power mode 2 specify: the terminal device may report a precoding matrix supporting data transmission at the target power based on its own capability, i.e., the terminal device may report an antenna port capable of transmitting data at the target power and an antenna port combination to the network device, and if the network device selects the precoding matrix reported by the terminal device based on the channel information, the network device may instruct the precoding matrix, and the terminal device transmits data at the target power based on the precoding matrix. If the network device is based on the precoding matrix indicated by the channel information and not reported by the terminal device, the terminal device can realize antenna virtualization by configuring SRS resources with different SRS port numbers, and virtually equals the total number of the denominator ports in the power scaling coefficient to the number of the numerator non-zero power ports, so that the power scaling coefficient is 1, and data transmission with a target power value is realized.

Based on the power control rule in the full power mode 2, the terminal device needs to determine which antenna ports and which antenna port combinations can support full power transmission, generate a precoding matrix based on the antenna ports and antenna port combinations, and report the precoding matrix to the network device, thereby increasing the complexity of the terminal device. In addition, the implementation of antenna virtualization also occupies more SRS resources.

As can be seen, in order to increase the power of the data transmitted by the terminal device, the power control rule specified by the existing protocol has a high requirement on the hardware of the terminal device, for example, the power control rule in the full power mode 0 requires that the PA of each antenna port of the terminal device can support the data transmission with the target power. The manner in which the transmit power is increased in the power control rules in full power mode 1 loses performance, requiring the terminal device to compensate for the performance in other ways. The power control rule in the full power mode 2 requires the terminal device to report the precoding matrix supporting full power transmission, and occupies additional SRS resources for the precoding matrix not reported to increase the transmission power.

The application provides a method and a device for determining uplink transmission power, wherein network equipment indicates antenna ports with non-zero power of terminal equipment, the terminal equipment can determine the transmission power based on a target transmission power value and the maximum transmission power value of each antenna port, the ratio of the number of the non-zero antenna ports to the total number of the antenna ports is not simply used as a power scaling factor, the transmission power capacity of each antenna port is considered, the power of the terminal equipment for transmitting data is improved as much as possible in the capacity range, the terminal equipment can not need to support the target transmission power value of each antenna port, and operations such as cyclic delay diversity and the like are not needed to be executed for improving the transmission power, so that the requirements on the hardware of the terminal equipment and the processing complexity of the terminal equipment are effectively reduced, and the application of the terminal equipment with low cost is enabled. The method for determining uplink transmission power according to the embodiment of the present application is described in detail below with reference to fig. 2.

Fig. 2 is a schematic flowchart of a method for determining uplink transmission power according to an embodiment of the present application.

S210, the network device sends the first information to the terminal device, and correspondingly, the terminal device receives the first information from the network device.

The first information is used to indicate non-zero power M antenna ports of the N antenna ports. Wherein, the M antenna ports with non-zero power are antenna ports for transmitting uplink data. The terminal equipment is provided with N antenna ports, N is a positive integer, and M is a positive integer smaller than or equal to N. It should be appreciated that the network device may determine the first information based on the channel state.

Optionally, the first information includes a TPMI and a number of transmission layers, so that the terminal device may determine to transmit data through M antenna ports of the N antenna ports based on the TPMI and the number of transmission layers.

Illustratively, if the first information indicates that the transmission layer number=1 and tpmi=8 based on the codebook of table 1, the terminal device may determine to transmit data through 2 antenna ports among the 4 antenna ports based on the first information. As another example, if the first information indicates that the transmission layer number=2, tpmi=4 based on the codebook of table 2, the terminal device may determine to transmit data through 2 antenna ports among the 4 antenna ports based on the first information, and if the first information indicates that the transmission layer number=2, tpmi=8 based on the codebook of table 2, the terminal device determines to transmit data through all antenna ports among the 4 antenna ports.

The network device may carry the first information through higher layer signaling, which may include, for example, RRC messages, MAC-CE signaling, etc. The network device may also carry the first information through physical layer signaling, which may include, for example, downlink control information (downlink control information, DCI) or the like, e.g., the first information is carried in the DCI. The application is not limited to specific signaling for carrying the first information.

S220, the terminal equipment sends uplink data to the network equipment at the first power value, and correspondingly, the network equipment receives the uplink data from the terminal equipment.

The first power value is determined based on the target transmission power value of the terminal device and the maximum transmission power value of each of the M antenna ports.

It should be noted that, the first power value is the sum of the transmission powers of the antenna ports with non-zero power, for example, the terminal device transmits data through 2 antenna ports among the 4 antenna ports, and then the first power value is the sum of the transmission powers of the 2 antenna ports.

The target transmission power value means: if the terminal device transmits upstream data to the network device at the target transmission power value, the network device can receive the upstream data at the expected power value.

The target transmission power value is illustratively determined based on the number of RBs used to transmit the data and/or the full path loss parameter. For example, the target transmission power value has a positive correlation with the number of RBs. The full path loss parameter may be used to represent the path loss between the network device and the terminal device, the target transmit power value having a positive correlation with the path loss, i.e. the larger the path loss, the larger the target transmit power value.

The target transmission power value may be calculated by the terminal device based on a power control formula. The parameters in the power control formula may include the number of resource blocks and the full path loss parameter. The present application is not particularly limited to this power control formula, and for example, the power control formula may be a calculation formula for determining transmission power of a Physical Uplink SHARED CHANNEL (PUSCH) specified in the protocol 3GPP TS 38.213V15.15.0.

The maximum transmission power value of an antenna port refers to the maximum value of transmission power that a single antenna port can support. If the antenna port transmits data at a power greater than the maximum transmission power value, the antenna port has a risk of being damaged. The maximum transmit power value of an antenna port is determined based on the hardware capability of each antenna port, e.g., the maximum power value of an antenna port is a limit value of the power amplifier of that antenna port. Since the design and layout of each antenna port may be different, the maximum transmit power value may be the same or different for each antenna port. In order to ensure proper operation of the antenna hardware of the terminal device, it is necessary to limit the transmission power allocated to one antenna port not to exceed the maximum transmission power value of that antenna port.

Optionally, the first power value is less than or equal to a minimum value of maximum transmission power values of each of the M antenna ports multiplied by M.

That is, if the first power value is equally allocated to M non-zero power ports, the transmission power allocated to the M non-zero power ports does not exceed the maximum transmission power value of the non-zero power ports. Therefore, based on the first power value determined by the implementation manner, any one non-zero power antenna port cannot be overloaded, damage to the antenna port caused by overload operation is avoided, the reliability of data transmission of the terminal equipment can be improved, and normal operation of the antenna port can be ensured.

It should be noted that, in the existing power control rule, the hardware design of the antenna ports is designed based on the power control rule, for example, the transmission power in the protocol 3GPP TS 38.213V15.15.0 is equal to the target transmission power value multiplied by (N/M), if the network device instructs the terminal device to transmit data using 2 antenna ports out of the 4 antenna ports, the transmission power value of each antenna port is 0.25×the target power value, that is, when designing the antenna ports, it is necessary to guarantee that the maximum transmission power value of each antenna port of the terminal device is greater than or equal to 0.25×the target power value in hardware. In the uplink transmission power method provided by the implementation manner, the determination of the first power value is based on the capability of the antenna port, and the first power value does not enable the transmission power of the antenna port to be greater than the maximum transmission power. That is, in the power control rule of the existing protocol, the transmission power is mainly determined based on the transmission power expected by the network device, and the design of the hardware of the terminal device needs to take the power control rule as a premise.

Optionally, the first power value is equal to the target transmission power value multiplied by a first coefficient. The first coefficient has two possible values:

When the first value is greater than or equal to 1, the first coefficient is equal to 1, wherein the first value is a ratio of a minimum value of the maximum transmission power values of each of the M antenna ports multiplied by M to a target transmission power value;

in case the first value is smaller than 1, the first coefficient is equal to the first value.

To facilitate understanding of the embodiments of the present application, a 4 antenna port (n=4) is illustrated below. Illustratively, the maximum transmit power values for the four antenna ports 1-4 are, in order, 23 decibel milliwatts (decibel relative to one milliwatt, dBm), 20dBm, and 17dBm, respectively, with a target transmit power value of 23dBm.

If the first information indicates tpmi=0 (codeword 1/2[1, 0] ^T) based on table 1, then the non-zero power port is antenna port 1, the first value is equal to 1 (23 dbm×1/23 dbm=1), the first coefficient is equal to 1, and the terminal device transmits data at 23dBm through antenna port 1.

If the first information indicates tpmi=1 (codeword 1/2[0,1, 0] ^T) based on table 1, then the non-zero power port is antenna port 2, the first value is equal to 0.5 (20 dbm×1/23 dbm=0.5), the first coefficient is equal to 0.5, and the terminal device transmits data at 20dBm through antenna port 2.

If the first information indicates tpmi=4 (codeword 1/2[1,0,1,0] ^T) based on table 1, then the non-zero power ports are antenna ports 1 and 3, the first value is equal to 1 (20 dbm×2/23 dbm=1), the first coefficient is equal to 1, the terminal device transmits data at 23dBm through the antenna ports 1 and 3, and the respective transmission powers of the antenna ports 1 and 3 are 20dBm.

It can be seen that, for incoherent code words and partially coherent code words, unlike 3GPP TS 38.213V15.15.0 where the power scaling factor (M/N) is constantly smaller than 1, the first coefficient determined in the embodiment of the present application is determined based on the capability of the antenna port, and the transmission power is increased as much as possible within the capability range of the antenna port, so that the transmission power of the terminal device is maximized.

It is understood that when the number of transmission layers is greater than 1, for example, the first information indicates tpmi=1 based on table 2, the non-zero power ports are antenna ports 1 and 3, the first value is equal to 1 (20 dbm×2/23 dbm=1), the first coefficient is equal to 1, and the terminal device performs data transmission with the number of transmission layers being 2 at the transmission power of 20dBm through the antenna ports 1 and 3, which is similar to the determination rule when the number of transmission layers is 1, and will not be repeated herein.

In one possible implementation, the first coefficient α may be:

Wherein i is more than or equal to 1 and less than or equal to N,

Delta _i is used to indicate whether the ith antenna port of the N antenna ports is a non-zero power antenna port. In the case where the i-th antenna port is a non-zero power port, δ _i =1; in the case where the i-th antenna port is not a non-zero power port, δ _i =0.

P _i is the capacity coefficient of the ith antenna port of the N antenna ports, and p _i is equal to the ratio of the maximum transmission power value of the ith antenna port to the target transmission power value.

In this implementation manner, the terminal device may not need to know a specific value of the maximum transmission power value of the antenna port, and may determine the first coefficient by using a ratio of the maximum transmission power value to the target transmission power value.

It should be noted that, based on the formula, when the first value is calculated, the first value is i from 1 to NDelta _i = 0,/>, when the i-th antenna port is not a non-zero power portThe value of (2) is positive infinity.

In another possible implementation, the first coefficient α may be:

wherein j is more than or equal to 1 and less than or equal to M,

P _j is the capacity coefficient of the j-th antenna port of the M antenna ports (non-zero power ports), and p _j is equal to the ratio of the maximum transmission power value of the j-th antenna port to the target transmission power value.

In yet another possible implementation, the first power value P may be:

Wherein P _min is the minimum of the maximum transmit powers of the M non-zero antenna ports.

It should be noted that, in this implementation manner, the terminal device may compare the product of the minimum value P _min and the M value in the maximum transmission power of each non-zero port in the M non-zero antenna ports with the target transmission power value, and take the first power value as the target transmission power value when the product of P _min and the M value is greater than or equal to the target transmission power value, and take the product of the first power value P _min and the M value when the product of P _min and the M value is less than the target transmission power value.

Optionally, the terminal device may further report the maximum transmission power value of each antenna port to the network device, so that the network device may determine the first information based on the capability information, that is, before step S210, the method may further include step S230.

And S230, the terminal equipment sends the capability information to the network equipment, and correspondingly, the network equipment receives the capability information from the terminal equipment.

The capability information is used to indicate a maximum transmission power value of each of the N antenna ports, so that the network device may select M antenna ports from the N antenna ports for transmitting data based on the capability information.

The network device may also consider, for example, the maximum transmit power of each antenna port when selecting an antenna port based on the channel state. In one possible implementation, in the case of transmitting data through a single antenna port, the network device may instruct the terminal device to transmit data using the antenna port with the largest maximum transmission power value. In another possible implementation manner, in a case that the multiple antenna ports transmit data, the network device may instruct the terminal device to transmit data using multiple antenna ports with larger maximum transmission power values, so that the transmission power of the terminal device can be increased. In yet another possible implementation, in a case where the multiple antenna ports transmit data, the network device may instruct the terminal device to transmit data using multiple antenna ports whose maximum transmit power values differ minimally. For example, the maximum transmission power values of the four antenna ports 1 to 4 are 23dBm, 20dBm, 17dBm, and 17dBm, respectively, in order, and if the network device is to select 2 antenna ports from among the 4 antenna ports to transmit data, the network device may select the antenna ports 3 and 4 having the smallest phase difference to transmit data, and the terminal device may transmit data using a target transmission power value of 0.5 times based on the rule of determining the first power value. It can be seen that if the network device selects the antenna ports 2 and 3 to transmit data, based on the rule of determining the first power value, the network device also uses a target transmit power value of 0.5 times to transmit data, and the antenna port 2 also uses only 17dBm of capability, and in this implementation, the antenna ports 3 and 4 are selected, so that PA efficiency of the antenna ports can be more reasonably utilized.

Based on the technical scheme, the network device indicates the antenna ports with non-zero power of the terminal device, the terminal device can determine uplink transmission power based on the target transmission power value and the maximum transmission power value of each antenna port, the uplink transmission power is not simply determined according to the number of the non-zero antenna ports and the total number of the antenna ports, the transmission power capacity of each antenna port is considered, the power of the terminal device for transmitting uplink data is improved as much as possible in the capacity range, the terminal device does not need to support transmission with the target transmission power value in each antenna port, and operations such as cyclic delay diversity and the like are not needed to be executed for improving the transmission power, so that the requirements on the hardware of the terminal device and the processing complexity of the terminal device are effectively reduced, and the application of the terminal device with low cost is enabled.

The method for determining uplink transmission power provided by the embodiment of the present application is described above with reference to fig. 2, and the device for determining uplink transmission power provided by the embodiment of the present application is described below with reference to fig. 3 to 5.

Fig. 3 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in fig. 3, the communication device 300 includes a transceiver unit 320 and a processing unit 310, where the transceiver unit 320 may be used to implement a corresponding communication function, and the processing unit 310 may be used to perform data processing.

Alternatively, the transceiver unit 320 may also be referred to as a communication interface or a communication unit, including a transmitting unit and/or a receiving unit. The transceiver unit 320 may be a transceiver (including a transmitter and/or a receiver), an input/output interface (including an input and/or output interface), pins or circuitry, etc. The transceiver unit 320 may be configured to perform the steps of transmitting and/or receiving in the above-described method embodiments.

Alternatively, the processing unit 310 may be a processor (may include one or more), a processing circuit with a processor function, or the like, and may be configured to perform steps other than transmission and reception in the above-described method embodiments.

Optionally, the apparatus 300 further includes a storage unit, which may be a memory, an internal storage unit (e.g., a register, a cache, etc.), an external storage unit (e.g., a read-only memory, a random access memory, etc.), and so on. The storage unit is configured to store instructions, and the processing unit 310 executes the instructions stored in the storage unit, so that the communication device performs the method.

In one design, the apparatus 300 may be configured to perform the actions performed by the terminal device in the various method embodiments above, e.g., the apparatus 300 may be configured to perform the actions performed by the terminal device in the method 300 above. In this case, the apparatus 300 may be a component of a terminal device, the transceiver unit 320 is configured to perform operations related to the transceiver of the terminal device in the above method, and the processing unit 310 is configured to perform operations related to the processing of the terminal device in the above method embodiment.

Specifically, the transceiver unit 320 is configured to receive first information from a network device, where the first information is used to indicate M antenna ports with non-zero power from N antenna ports of the device, where M and N are both positive integers, and M is less than or equal to N; a processing unit 310, configured to determine a first power value based on the target transmission power value and a maximum transmission power value of each of the M antenna ports; the transceiver unit 320 is further configured to send uplink data to the network device at the first power value.

It should be understood that the transceiver unit 320 and the processing unit 310 may also perform other operations performed by the terminal device in the method 300, which are not described in detail herein.

In one design, the apparatus 300 may be used to perform the actions performed by the network devices in the various method embodiments above, such as the apparatus 300 may be used to perform the actions performed by the network devices in the methods 800 and 900 above. In this case, the apparatus 300 may be a component of a network device, where the transceiver unit 320 is configured to perform operations related to the transceiver of the network device in the above method, and the processing unit 310 is configured to perform operations related to the processing of the network device in the above method embodiment.

Specifically, the processing unit 310 is configured to generate first information, where the first information is used to indicate M antenna ports with non-zero power from N antenna ports of the terminal device, where M and N are both positive integers, and M is less than or equal to N; a transceiver unit 320, configured to send the first information to a terminal device; the transceiver 320 is further configured to receive uplink data from the terminal device, where a transmission power value of the uplink data is a first power value, and the first power value is determined based on a target transmission power value of the uplink data and a maximum transmission power value of each of the M antenna ports.

It should be understood that the transceiver unit 320 and the processing unit 310 may also perform other operations performed by the network device in the method 300, which are not described in detail herein.

It should also be appreciated that the apparatus 300 herein is embodied in the form of functional units. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor, etc.) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an alternative example, it will be understood by those skilled in the art that the apparatus 300 may be specifically a network device in the foregoing embodiment, and may be used to perform each flow and/or step corresponding to the network device in the foregoing method embodiments, which is not described herein for avoiding repetition.

The apparatus 300 of each of the above aspects has a function of implementing the corresponding step performed by the terminal device in the above method, or the apparatus 300 of each of the above aspects has a function of implementing the corresponding step performed by the network device in the above method. The functions may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver module may be replaced by a transceiver (e.g., a transmitting unit in the transceiver module may be replaced by a transmitter, a receiving unit in the transceiver module may be replaced by a receiver), and other units, such as a processing module, etc., may be replaced by a processor, to perform the transceiver operations and associated processing operations, respectively, in various method embodiments.

The transceiver unit 320 may be a transceiver circuit (e.g., may include a receiving circuit and a transmitting circuit), and the processing module may be a processing circuit.

It should be noted that the apparatus in fig. 3 may be a network element or a device in the foregoing embodiment, or may be a chip or a chip system, for example: system on chip (SoC). The transceiver module can be an input/output circuit and a communication interface; the processing module is an integrated processor or microprocessor or integrated circuit on the chip. And are not limited herein.

Fig. 4 is a schematic diagram of a communication architecture according to an embodiment of the present application. The communication apparatus 400 shown in fig. 4 includes: a processor 410, a memory 420, and a transceiver 430. The processor 410 is coupled to the memory 420 for executing instructions stored in the memory 420 to control the transceiver 430 to transmit signals and/or receive signals.

It should be appreciated that the processor 410 and the memory 420 may be combined into one processing device, and the processor 410 is configured to execute the program codes stored in the memory 420 to implement the functions described above. In particular implementations, the memory 420 may also be integrated into the processor 410 or independent of the processor 410. It should be understood that the processor 410 may also correspond to each processing unit in the previous communication device, and the transceiver 430 may correspond to each receiving unit and transmitting unit in the previous communication device.

It should also be appreciated that transceiver 430 may include a receiver (or receiver) and a transmitter (or transmitter). The transceiver may further include antennas, the number of which may be one or more. The transceiver may also be a communication interface or interface circuit.

In particular, the communication apparatus 400 may correspond to a terminal device and a network device in the method according to an embodiment of the present application. It should be understood that the specific process of each unit performing the corresponding steps has been described in detail in the above method embodiments, and is not described herein for brevity.

When the communication device 400 is a chip, the chip includes an interface unit and a processing unit. The interface unit can be an input/output circuit or a communication interface; the processing unit may be an integrated processor or microprocessor or an integrated circuit on the chip.

In the embodiment of the present application, when the device is a network device, the device may be as shown in fig. 5. The apparatus may include one or more radio frequency units, such as an active antenna processing unit (ACTIVE ANTENNA unit, AAU) 510 and one or more baseband units (BBU) (also referred to as digital units, DUs) 520. The RRU510 may be referred to as a transceiver module, which may include a transmitting module and a receiving module, or the transceiver module may be a module capable of implementing transmitting and receiving functions. The transceiver module may correspond to the transceiver module 320 in fig. 3, i.e., the actions performed by the transceiver module 320 may be performed by the transceiver module. Alternatively, the transceiver module may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 511 and a radio frequency unit 512. The AAU510 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals and baseband signals. The BBU 520 is mainly used for baseband processing, control of a base station, and the like. The AAU510 and BBU 520 may be physically located together or physically separate, i.e., distributed base stations. The AAU may also be a remote radio unit (remote radio unit, RRU).

The BBU 520 is a control center of the base station, and may also be referred to as a processing module, and may correspond to the processing unit 310 in fig. 3, and is mainly configured to perform baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on, and may further be configured to perform actions performed by the processing unit 310. For example, the BBU (processing module) may be configured to control the base station to perform the operation procedures described in the above method embodiments with respect to the network device.

In one example, the BBU520 may be formed by one or more single boards, where the multiple single boards may support a single access radio access network (e.g., an LTE network), or may support different access radio access networks (e.g., an LTE network, a 5G network, or other networks). The BBU520 further comprises a memory 521 and a processor 522. The memory 521 is used to store necessary instructions and data. The processor 522 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure of the above-described method embodiment with respect to the network device. The memory 521 and processor 522 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method. To avoid repetition, a detailed description is not provided herein.

It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capability. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a 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, discrete gate or transistor logic, or discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The application also provides a computer readable medium having stored thereon a computer program which when executed by a computer performs the functions of any of the method embodiments described above.

The application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above.

In the above embodiments, it may be implemented in whole or in part 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 instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a solid-state disk (solid-state drive STATE DISK, SSD)), or the like.

In embodiments of the application, words such as "exemplary," "for example," and the like are used to indicate by way of example, illustration, or description. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments are not necessarily referring to the same embodiments throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application. The names of all nodes and messages in the present application are only names set for the convenience of description of the present application, and names in actual networks may be different, and it should not be understood that the present application is limited to the names of various nodes and messages, but any names having the same or similar functions as those of the nodes or messages used in the present application are regarded as methods or equivalent alternatives of the present application, and are within the scope of protection of the present application.

It should also be understood that, in the present application, "when …", "if" and "if" all refer to that the UE or the base station will make corresponding processing under some objective condition, and are not limited in time, nor do they require that the UE or the base station must have judgment actions when implemented, nor are they meant to imply other limitations.

In addition, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The term "at least one of … …" or "at least one of … …" herein means all or any combination of the listed items, e.g., "at least one of A, B and C," may mean: there are six cases where A alone, B alone, C alone, both A and B, both B and C, and both A, B and C. The term "at least one" as used herein means one or more. "plurality" means two or more.

It should be understood that in embodiments of the present application, "B corresponding to a" means that B is associated with a from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

It should be understood that in the various embodiments of the present application, the first, second and various numbers are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. For example, different information is distinguished, etc.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

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

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for determining uplink transmit power, wherein a terminal device has N antenna ports, the method comprising:

The terminal equipment receives first information from network equipment, wherein the first information is used for indicating M antenna ports with non-zero power in the N antenna ports, M and N are positive integers, and M is smaller than or equal to N;

The terminal device transmits uplink data to the network device at a first power value, which is determined based on a target transmission power value and a maximum transmission power value of each of the M antenna ports.

2. The method of claim 1, wherein the first power value is less than or equal to a minimum of maximum transmit power values for each of the M antenna ports multiplied by the M.

3. The method of claim 1 or 2, wherein,

When a first value is greater than or equal to 1, a first coefficient is equal to 1, wherein the first value is a ratio of a minimum value of maximum transmission power values of each of the M antenna ports multiplied by the M to the target transmission power value;

the first power value is equal to the target transmission power value multiplied by the first coefficient.

4. The method of claim 1 or 2, wherein,

When the first value is smaller than 1, the first coefficient is equal to the first value, wherein the first value is the ratio of the minimum value of the maximum transmission power values of each of the M antenna ports multiplied by the M to the target transmission power value;

5. The method according to any one of claims 1 to 4, wherein the first power value is equal to the target transmission power value multiplied by a first coefficient α being:

Wherein i is more than or equal to 1 and less than or equal to N, delta _i is used for indicating whether the ith antenna port in the N antenna ports is a non-zero power antenna port or not; in the case where the i-th antenna port is a non-zero power antenna port, δ _i =1; delta _i＝0;p_i is a capability coefficient of an ith antenna port of the N antenna ports in the case that the ith antenna port is not a non-zero power antenna port, and the p _i is equal to a ratio of a maximum transmission power value of the ith antenna port to the target transmission power value.

6. The method according to any one of claims 1 to 4, wherein the first power value is equal to the target transmission power value multiplied by a first coefficient α being:

α＝min(1,m_jinp_jM)，

Wherein j is greater than or equal to 1 and less than or equal to M, p _j is the capacity coefficient of the j-th antenna port in the M antenna ports, and p _j is equal to the ratio of the maximum transmission power value of the j-th antenna port to the target transmission power value.

7. The method of any one of claims 1 to 6, wherein the first information is carried in downlink control information, DCI.

8. The method of any one of claims 1 to 7, wherein the method further comprises:

The terminal device sends capability information to the network device, the capability information indicates a maximum sending power value of each antenna port in the N antenna ports, and the capability information is used for determining the first information.

9. A method for determining uplink transmit power, the method comprising:

The network equipment sends first information to terminal equipment, wherein the first information is used for indicating M antenna ports with non-zero power in N antenna ports of the terminal equipment, M and N are positive integers, and M is smaller than or equal to N;

The network device receives uplink data from the terminal device, wherein a transmission power value of the uplink data is a first power value, and the first power value is determined based on a target transmission power value and a maximum transmission power value of each of the M antenna ports.

10. The method of claim 9, wherein the first power value is less than or equal to a minimum of maximum transmit power values for each of the M antenna ports multiplied by the M.

11. The method of claim 9 or 10, wherein,

12. The method of claim 9 or 10, wherein,

13. The method according to any one of claim 9 to 12, wherein,

The first power value is equal to the target transmission power value multiplied by a first coefficient, and the first coefficient alpha is:

Wherein i is more than or equal to 1 and less than or equal to N, delta _i is used for indicating whether the ith antenna port in the N antenna ports is a non-zero power antenna port or not; in the case where the i-th antenna port is a non-zero power antenna port, δ _i =1; in the case where the i-th antenna port is not a non-zero power antenna port, δ _i =0;

p _i is a capacity coefficient of an ith antenna port of the N antenna ports, and p _i is equal to a ratio of a maximum transmission power value of the ith antenna port to the target transmission power value.

14. The method according to any one of claims 9 to 13, wherein the first power value is equal to the target transmission power value multiplied by a first coefficient α being:

α＝min(1,m_jinp_jM)，

15. The method of any one of claims 9 to 14, wherein the first information is carried in downlink control information, DCI.

16. The method of any one of claims 9 to 15, wherein the method further comprises:

The network device receives capability information from the terminal device, the capability information indicates a maximum transmission power value of each of N antenna ports of the terminal device, and the first information is determined according to the capability information.

17. An apparatus for determining uplink transmission power, characterized in that the apparatus comprises a transceiver unit and a processing unit,

The transceiver unit is configured to receive first information from a network device, where the first information is used to indicate M antenna ports with non-zero power from N antenna ports of the apparatus, where M and N are both positive integers, and the M is less than or equal to the N;

The processing unit is configured to determine a first power value based on a target transmission power value and a maximum transmission power value of each of the M antenna ports;

The transceiver unit is further configured to send uplink data to the network device at a first power value.

18. The apparatus of claim 17, wherein the first power value is less than or equal to a minimum of maximum transmit power values for each of the M antenna ports multiplied by the M.

19. The apparatus of claim 17 or 18, wherein,

20. The apparatus according to any one of claims 17 to 19, wherein

21. The apparatus according to any one of claims 17 to 20, wherein the first power value is equal to the target transmission power value multiplied by a first coefficient α being:

22. The apparatus according to any one of claims 17 to 20, wherein the first power value is equal to the target transmission power value multiplied by a first coefficient α being:

23. The apparatus of any one of claims 17 to 22, wherein the first information is carried in downlink control information, DCI.

24. The apparatus according to any one of claim 17 to 23,

The transceiver unit is further configured to send capability information to the network device, where the capability information indicates a maximum transmission power value of each of the N antenna ports.

25. An apparatus for determining uplink transmission power, characterized in that the apparatus comprises a transceiver unit and a processing unit, wherein,

The processing unit is configured to generate first information, where the first information is used to indicate M antenna ports with non-zero power from N antenna ports of the terminal device, where M and N are both positive integers, and M is less than or equal to N;

the receiving and transmitting unit is used for transmitting the first information to the terminal equipment;

The transceiver unit is further configured to receive uplink data from the terminal device, where a transmission power value of the uplink data is a first power value, and the first power value is determined based on a target transmission power value and a maximum transmission power value of each of the M antenna ports.

26. The apparatus of claim 25, wherein the first power value is less than or equal to a minimum of the M maximum transmit power values multiplied by the M.

27. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

28. The apparatus of claim 25 or 26, wherein the device comprises a plurality of sensors,

29. The apparatus according to any one of claims 25 to 28, wherein the first power value is equal to the target transmit power value multiplied by a first coefficient, the first coefficient α being:

30. The apparatus according to any one of claims 25 to 28, wherein the first power value is equal to the target transmit power value multiplied by a first coefficient, the first coefficient α being:

31. The apparatus of any one of claims 25 to 30, wherein the first information is carried in downlink control information, DCI.

32. The apparatus according to any one of claim 25 to 31,

The transceiver is further configured to receive capability information from the terminal device, where the capability information indicates a maximum transmission power value of each of N antenna ports of the terminal device, and the first information is determined according to the capability information.

33. A communication device comprising a processor coupled to a memory for storing a computer program or instructions, the processor for executing the computer program or instructions in memory, causing the device to perform the method of any one of claims 1 to 8 or to perform the method of any one of claims 9 to 16.

34. A computer readable storage medium, having stored thereon a computer program or instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 8 or the method of any of claims 9 to 16.

35. A chip system, comprising: a processor for calling and running a computer program from a memory, causing a communication device in which the chip system is installed to perform the method of any one of claims 1 to 8 or to perform the method of any one of claims 9 to 16.

36. A computer program product, characterized in that the computer program product, when run on a computer, causes the computer to perform the steps of the method according to any one of claims 1 to 8 or to perform the steps of the method according to any one of claims 9 to 16.