Power determination method and related apparatus

Abstract

The present application provides a power determination method and a related apparatus. The method comprises: a network device generates a first reference signal, and sends the first reference signal to a terminal device; the terminal device receives the first reference signal from the network device, and measures the first reference signal to obtain a measurement result; and the terminal device determines a first transmission power on the basis of the measurement result, the first transmission power being the transmission power of uplink transmission. The method provided in the present application achieves power control of a low-power-consumption terminal (such as an A-IoT terminal) which does not have a RSRP measurement capability.

Description

Power determination method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 12, 2023, with application number 202310694521.0 and application name “Power Determination Method and Related Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a power determination method and related devices. Background Art

[0003] With the increasing popularity of the Internet of Things (IoT), more and more IoT devices are appearing in people's lives. To further popularize the IoT, for example, by embedding IoT modules in smaller objects, it is necessary to use smaller batteries to overcome battery limitations or devise methods to reduce the power consumption of radio transceivers to overcome the cost, size, and power consumption limitations of IoT devices.

[0004] Therefore, low-power IoT devices have become a research focus. Ambient IoT (A-IoT) is a type of ultra-low-power IoT device that can be categorized as either active or passive. Active A-IoT receivers, however, lack modules like high-power, high-precision phase-locked loops (PLLs) and cannot support coherent demodulation. They only support low-power envelope detection and lack the ability to measure reference signal received power (RSRP). Consequently, these A-IoT receivers cannot achieve power control by measuring and feeding back RSRP, as traditional terminal devices do.

[0005] Summary of the Invention

[0006] The present application provides a power determination method and related apparatus, which implement power control of a low-power terminal without RSRP measurement capability.

[0007] In a first aspect, the present application provides a power determination method. This method can be applied to a terminal device. For example, it can be executed by the terminal device, or it can be executed by a component configured in the terminal device (such as a chip, chip system, etc.), or it can be implemented by a logic module or software that can implement all or part of the terminal device functions, which is not limited by this application.

[0008] Exemplarily, the method includes: receiving a first reference signal; measuring the first reference signal to obtain a measurement result; and determining a first transmit power based on the measurement result, where the first transmit power is a transmit power for uplink transmission.

[0009] The first reference signal may include a first signal used for time synchronization of the terminal device and / or a second signal used for frequency synchronization of the terminal device.

[0010] For example, the first signal may be a time synchronization sequence (TSS), and the second signal may be a frequency synchronization sequence (FSS). The TSS may be a binary sequence selected from a machine with good correlation characteristics and a length of 16; the FSS may be a single-tone signal and a length of 29 orthogonal frequency division multiplexing (OFDM) symbols.

[0011] Optionally, the first reference signal may further include a physical broadcast channel (PBCH).

[0012] Exemplarily, the measurement result is a received signal strength indicator (RSSI) or the number of first reference signals required to successfully demodulate the first reference signal.

[0013] The first transmission power being the transmission power for uplink transmission can be understood as: the terminal device uses the first transmission power to send uplink information to the network device, for example, the terminal device uses the first transmission power to send an uplink reference signal or uplink data to the network device.

[0014] Since RSRP is usually the linear average of the signal power received by the terminal device on all resource units carrying the reference signal within a certain orthogonal frequency division multiplexing (OFDM) symbol duration within the measurement bandwidth. Therefore, when the terminal device is a low-power terminal, due to the limitation of the terminal device's capabilities, low-power coherent demodulation is usually not supported, and the information of the frequency domain resource element (RE) granularity cannot be identified, resulting in the low-power terminal being unable to measure the RSRP of the reference signal. However, this terminal that only supports non-coherent demodulation can identify the filter bandwidth, that is, it can identify the information of the bandwidth granularity, and RSSI usually refers to the signal strength of the entire transmission bandwidth. Therefore, the present application obtains the RSSI of the first reference signal or the number of first reference signals required to successfully demodulate the first reference signal by measuring the first reference signal, thereby determining the uplink transmit power based on the measurement result of the first reference signal. This method can solve the problem of determining the uplink transmit power of low-power terminals without RSRP measurement capability, and at the same time avoid interference to neighboring cells caused by excessive transmit power.

[0015] Accordingly, the measurement result is RSSI.

[0016] In combination with the first aspect, in some implementations of the first aspect, determining the first transmit power based on the measurement result includes: determining the first transmit power based on the RSSI.

[0017] In combination with the first aspect, in certain implementations of the first aspect, determining the first transmission power based on the RSSI includes: determining the first transmission power based on the RSSI and at least one of the following: a first power offset or a first mapping relationship corresponding to the bandwidth of the uplink transmission, the first mapping relationship indicating a one-to-one correspondence between multiple RSSI intervals and multiple transmission powers, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals.

[0018] Example 1: The terminal device determines the first transmission power based on the RSSI and the first power offset corresponding to the bandwidth of the uplink transmission.

[0019] It should be understood that different uplink transmission bandwidths may also correspond to different power offsets.

[0020] Exemplarily, the terminal device determines a transmit power based on the RSSI, and determines a first transmit power based on the transmit power and the first power offset. For example, the first transmit power may be the sum of the transmit power and the first power offset.

[0021] Example 2: The terminal device determines the first transmission power based on RSSI and the first mapping relationship.

[0022] Since the first mapping relationship indicates a one-to-one correspondence between multiple RSSI intervals and multiple transmission powers, when the terminal device obtains the RSSI, it can determine the interval to which the RSSI belongs from the multiple intervals indicated by the first mapping relationship, and determine the transmission power corresponding to the interval based on the first mapping relationship. This transmission power can be used as the first transmission power in this application.

[0023] Example three: The terminal device determines the first transmission power based on RSSI, the first power offset corresponding to the bandwidth of the uplink transmission, and the first mapping relationship.

[0024] Exemplarily, the terminal device determines the transmission power corresponding to the reference bandwidth based on RSSI; and determines the first transmission power based on the transmission power corresponding to the reference bandwidth and the first power offset corresponding to the bandwidth of the uplink transmission.

[0025] The reference bandwidth may be predefined. The uplink transmission bandwidth may be understood as the bandwidth used when the terminal device sends an uplink reference signal or uplink data to the network device.

[0026] The above-mentioned determination of the transmission power corresponding to the reference bandwidth based on RSSI includes: determining the transmission power corresponding to the reference bandwidth based on the RSSI and a first mapping relationship, the first mapping relationship indicating a one-to-one correspondence between multiple RSSI intervals and multiple transmission powers, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals.

[0027] It should be understood that any two of the multiple RSSI intervals indicated by the first mapping relationship do not overlap, that is, any RSSI value will not fall into two or more RSSI intervals at the same time.

[0028] In this application, since the first mapping relationship indicates a one-to-one correspondence between multiple RSSI intervals and multiple transmission powers, when the terminal device obtains the RSSI, it can determine the interval to which the RSSI belongs from the multiple intervals indicated by the first mapping relationship, and determine the transmission power corresponding to the interval based on the first mapping relationship. The transmission power is the transmission power corresponding to the reference bandwidth in this application.

[0029] The first power offset corresponding to the bandwidth of the uplink transmission can be determined based on the following method: the first power offset is determined based on the bandwidth of the uplink transmission and a second mapping relationship, where the second mapping relationship indicates a one-to-one correspondence between multiple bandwidths and multiple power offsets.

[0030] It should be understood that the multiple bandwidths indicated by the second mapping relationship are different from each other.

[0031] In the present application, since the second mapping relationship indicates a one-to-one correspondence between multiple bandwidths and multiple power offsets, after determining the bandwidth of the uplink transmission, the terminal device can determine a bandwidth that is the same as the bandwidth of the uplink transmission from the multiple bandwidths indicated by the second mapping relationship, and determine the power offset corresponding to the bandwidth. This power offset is the first power offset in the present application.

[0032] Exemplarily, the first transmission power P1 satisfies: P1=P TX +Δ,

[0033] Among them, P TX is the transmit power corresponding to the above reference bandwidth, and Δ is the first power offset.

[0034] In combination with the first aspect, in some implementations of the first aspect, the method further includes: determining that the RSSI is greater than or equal to a preset threshold.

[0035] In other words, when the measured RSSI is greater than or equal to a preset threshold, the terminal device determines the first transmission power based on the RSSI and at least one of the following: a first power offset or a first mapping relationship corresponding to the bandwidth of the uplink transmission.

[0036] Optionally, when it is determined that the RSSI is greater than or equal to a preset threshold, the terminal device may also determine the first transmission power based on a multiple relationship between the RSSI and the preset threshold.

[0037] Exemplarily, when the RSSI is greater than or equal to a preset threshold, the RSSI may be X (X is greater than 0) times the preset threshold, then the first transmit power may be 1 / Y, where Y is a function of the maximum transmit power of the terminal device.

[0038] In combination with the first aspect, in certain implementations of the first aspect, determining the first transmission power based on the RSSI includes: when the RSSI is less than a preset threshold, determining the first transmission power as the maximum transmission power of the terminal device.

[0039] Exemplarily, the preset threshold is -174+10*lg A, where A is the bandwidth of uplink transmission.

[0040] It should be understood that the maximum transmission power of a terminal device is the maximum power that the terminal device can use when performing uplink transmission.

[0041] It should also be understood that the maximum transmission power corresponding to different terminal devices is generally different.

[0042] It should be noted that, in this application, based on the measurement of the first reference signal, the RSSI value obtained is less than 0.

[0043] For example, if the absolute value of the measured RSSI is taken, an RSSI with a value greater than 0 can be obtained, which is recorded as the absolute RSSI. In the process of determining the first transmission power based on the size relationship between the absolute RSSI and the preset threshold, it is also necessary to take the absolute value of the preset threshold with a value less than 0 to obtain the absolute preset threshold (for example, -174+10*lg A is changed to 174+10*lg A), and then determine the first transmission power based on the size relationship between the two.

[0044] For example, when the absolute value RSSI is greater than the absolute value preset threshold, the first transmission power is determined to be the maximum transmission power of the terminal device; when the absolute value RSSI is less than or equal to the absolute value preset threshold, the process of determining the first transmission power can refer to the above-mentioned process of determining the first transmission power when the RSSI is greater than or equal to the preset threshold, and will not be repeated here.

[0045] Accordingly, the measurement result is the number of first reference signals required to successfully demodulate the first reference signal.

[0046] The number of first reference signals required for successful demodulation of the first reference signal can be understood as the number of times the first reference signal needs to be repeatedly transmitted when the first reference signal is successfully demodulated. Successfully demodulating the first reference signal can be understood as successfully demodulating a cell identifier from the first reference signal.

[0047] In combination with the first aspect, in certain implementations of the first aspect, determining the first transmit power based on the measurement result includes: determining the first transmit power based on the number of first reference signals required for successful demodulation of the first reference signal and a third mapping relationship, wherein the third mapping relationship indicates a one-to-one correspondence between multiple values ​​of the number of first reference signals required for successful demodulation of the first reference signal and multiple transmit powers.

[0048] In the present application, since the third mapping relationship indicates a one-to-one correspondence between multiple values ​​of the number of first reference signals required for successful demodulation of the first reference signal and multiple transmission powers, the terminal device can determine the same value as the number from the multiple values ​​indicated by the third mapping relationship after determining the number of first reference signals required for successful demodulation of the first reference signal, and determine the transmission power corresponding to the value, which is the first transmission power in the present application. This method of determining the uplink transmission power based on the number of first reference signals required for successful demodulation of the first reference signal can save RSSI measurement overhead and reduce the design complexity of the terminal device.

[0049] In combination with the first aspect, in some implementations of the first aspect, the method further includes: determining a coverage level based on the measurement result, where the coverage level indicates a maximum distance over which the uplink transmission can be transmitted.

[0050] Exemplarily, determining the coverage level by the terminal device based on the measurement result may include: determining the coverage level by the terminal device based on the measurement result and a fourth mapping relationship. The fourth mapping relationship indicates a one-to-one correspondence between multiple measurement results and multiple coverage levels. For example, there may be a one-to-one correspondence between multiple RSSIs and multiple coverage levels; or there may be a one-to-one correspondence between the number of first reference signals required to successfully demodulate the first reference signal and multiple coverage levels.

[0051] In combination with the first aspect, in some implementations of the first aspect, the method further includes: performing uplink transmission based on the first transmit power.

[0052] Exemplarily, the performing uplink transmission based on the first transmit power includes: sending an uplink reference signal based on the first transmit power.

[0053] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: receiving an RSRP from a network device, where the RSRP is determined based on an uplink reference signal; determining a second transmit power based on the RSRP and the first transmit power; and sending uplink data based on the second transmit power.

[0054] Optionally, the method further includes: receiving RSRP from a network device; determining a second transmit power based on the RSRP, the first transmit power and a second power offset corresponding to the uplink transmission bandwidth; and sending uplink data based on the second transmit power.

[0055] Exemplarily, the terminal device may determine a third transmit power based on RSRP and the first transmit power, and determine a second transmit power based on the third transmit power and the second power offset. For example, the second transmit power is the sum of the third transmit power and the second power offset.

[0056] It should be understood that the method for determining the second power offset may refer to the method for determining the first power offset, which will not be described in detail here.

[0057] The method in which the terminal device determines the uplink transmission power based on the RSRP from the network device and the first transmission power can be called a closed-loop power control method. The uplink power determined based on this method is more reliable and can reduce the interference of the transmission power to the neighboring cells.

[0058] In one example, determining the second transmit power based on the RSRP and the first transmit power includes: determining a path loss value based on the RSRP and the first transmit power; and determining the second transmit power based on the path loss value.

[0059] In another example, assuming that the first transmission power corresponds to the first transmission signal, the bandwidth of the first transmission signal is the first bandwidth, the second transmission power corresponds to the second transmission signal, and the bandwidth of the second transmission signal is the second bandwidth, then the above-mentioned terminal device can also determine the second transmission power based on at least one of the following: the ratio of the second bandwidth to the first bandwidth, the ratio of the subcarrier width of the second transmission signal to the subcarrier width of the first transmission signal, or the ratio of the number of subcarriers of the second transmission signal to the number of subcarriers of the first transmission signal, etc.

[0060] In combination with the first aspect, in certain implementations of the first aspect, the method further includes: receiving first information, the first information indicating a second transmit power, the second transmit power being determined based on RSRP and the first transmit power, the RSRP being determined based on an uplink reference signal; and sending uplink data based on the second transmit power.

[0061] Exemplarily, the second transmission power P2 in the i-th time slot of the serving cell c satisfies: P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0062] Among them, P CMAX,c (i) is the maximum transmit power of the terminal device configured in the i-th time slot of the serving cell c; M c The value of (i) is related to the number of subcarriers and the subcarrier spacing; c (j) is between 0 and 1, P O,c (j) is the received power level of each resource unit, PL c is the downlink path loss value of serving cell c.

[0063] It should be noted that α c (j) is the path loss compensation factor, α c The value of (j) includes 0 and 1, j represents different types of uplink scheduling; PL c The unit is decibel (dB); M c The value of (i) may also be related to the bandwidth of the first reference signal, the frequency occupied by the first reference signal, and the frequency of the uplink transmission signal.

[0064] In a second aspect, the present application provides another power determination method. This method can be applied to network devices. For example, it can be performed by the network device, or it can be performed by a component configured in the network device (such as a chip, chip system, etc.), or it can be implemented by a logic module or software that can implement all or part of the network device functions, which is not limited by this application.

[0065] Exemplarily, the method includes: generating a first reference signal; and sending the first reference signal.

[0066] In combination with the second aspect, in some implementations of the second aspect, the method further includes: performing uplink transmission based on a first transmission power, where the first transmission power is determined by a measurement result obtained by the terminal device based on a measurement of the first reference signal.

[0067] For the description of the first transmit power and uplink transmission, reference may be made to the description of the first aspect and will not be repeated here.

[0068] In combination with the second aspect, in some implementations of the second aspect, the uplink transmission based on the first transmit power includes: receiving an uplink reference signal sent from a terminal device based on the first transmit power; and determining RSRP based on the uplink reference signal.

[0069] In combination with the second aspect, in some implementations of the second aspect, the method further includes: sending the RSRP to the terminal device; and receiving uplink data sent from the terminal device based on the second transmit power.

[0070] The second transmit power is determined by the terminal device based on RSRP and the first transmit power. The specific process can be referred to the description in the first aspect and will not be repeated here.

[0071] In combination with the second aspect, in some implementations of the second aspect, the method also includes: obtaining the first transmission power; determining the second transmission power based on the RSRP and the first transmission power; sending first information, the first information indicating the second transmission power; and receiving uplink data sent from the terminal device based on the second transmission power.

[0072] It should be understood that the process of the network device determining the second transmit power based on RSRP and the first transmit power can refer to the relevant description in the first aspect and will not be repeated here.

[0073] In conjunction with the second aspect, in certain implementations of the second aspect, the second transmit power P2 in the i-th time slot of the serving cell c satisfies: P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PLc +10lg(M c (i))};

[0074] For the relevant description of each parameter in the above formula, please refer to the first aspect and will not be repeated here.

[0075] In a third aspect, the present application provides a communication device, comprising modules or units for implementing the method in any of the above aspects and any possible implementation of any of the aspects. It should be understood that each module or unit can implement the corresponding function by executing a computer program.

[0076] In a fourth aspect, the present application provides a communication device, comprising a processor, wherein the processor is configured to execute the method described in any of the above aspects and any possible implementation of any of the aspects.

[0077] The apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the above aspects may be implemented.

[0078] The apparatus may further include a communication interface, where the communication interface is used for the apparatus to communicate with other devices. Exemplarily, the communication interface may be a transceiver, a circuit, a bus, a module, or other types of communication interfaces.

[0079] In a fifth aspect, the present application provides a chip system comprising at least one processor for supporting the implementation of the functions involved in any of the above aspects and any possible implementation of any aspect, for example, receiving or processing the data and / or information involved in the above method.

[0080] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0081] The chip system can be composed of chips, or can include chips and other discrete devices.

[0082] In a sixth aspect, the present application provides a computer-readable storage medium comprising a computer program, which, when executed on a computer, enables the computer to implement the method in any of the above aspects and any possible implementation of any aspect.

[0083] In a seventh aspect, the present application provides a computer program product, comprising: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any aspect and any possible implementation of any aspect.

[0084] In an eighth aspect, the present application provides a communication system, comprising the aforementioned terminal device and network device.

[0085] It should be understood that the second to eighth aspects of the present application correspond to the technical solutions of the first aspect of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] FIG1 is a schematic diagram of the architecture of a communication system applicable to the method provided in an embodiment of the present application;

[0087] FIG2 is a schematic diagram of an ASK modulation method;

[0088] FIG3 is a schematic flow chart of a power determination method provided in an embodiment of the present application;

[0089] FIG4 is a schematic diagram of an SSB structure provided in an embodiment of the present application;

[0090] 5 and 6 are schematic block diagrams of communication devices provided in embodiments of the present application;

[0091] FIG7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0092] FIG8 is a schematic structural diagram of a wireless access network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0093] The technical solution in this application will be described below with reference to the accompanying drawings.

[0094] The technical solutions provided in this application can be applied to various communication systems, such as: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, sidelink (SL) communication system, world-wide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) mobile communication system or new radio access technology (NR), satellite communication system, etc. Among them, the 5G mobile communication system can include non-standalone (NSA) and / or standalone (SA) networking.

[0095] The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system, etc. This application does not limit this.

[0096] In this application, a radio access network (RAN) device is a device with wireless transceiver capabilities. It can provide wireless communication services and connect terminals to a wireless network. It can be a node in a radio access network, referred to as a RAN node.

[0097] In one possible scenario, a RAN node can be a base station (BS), an evolved NodeB (eNodeB), a transmission reception point (TRP), a home evolved NodeB (HNB), a wireless fidelity (Wi-Fi) access point (AP), a mobile switching center, a next-generation NodeB (gNB) in a 5G mobile communication system, a next-generation NodeB in a 6G mobile communication system, or a base station in a future mobile communication system. A RAN node can also be a device that performs base station functions in device-to-device (D2D) communication systems, vehicle-to-everything (V2X) communication systems, machine-to-machine (M2M) communication systems, and Internet of Things (IoT) communication systems. A RAN node can also be a RAN node in a non-terrestrial network (NTN), meaning that the RAN node can be deployed on a high-altitude platform or satellite. A RAN node can be a macro base station, a micro base station, an indoor base station, a relay node, a donor node, or a radio controller in a cloud radio access network (CRAN) scenario, or a node in an open radio access network (O-RAN or ORAN) scenario. Alternatively, a RAN node can be a server, a wearable device, a vehicle, or an onboard device. For example, a RAN node in V2X technology can be a roadside unit (RSU). Of course, a RAN node can also be a node in the core network.

[0098] In another possible scenario, multiple RAN nodes collaborate to assist terminal devices in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0099] In different systems, CU (or CU-CP and CU-UP), DU, or RU may have different names, but those skilled in the art will understand their meanings. For example, in the ORAN system, CU may be referred to as Open CU (O-CU), DU may be referred to as Open DU (O-DU), CU-CP may be referred to as Open CU-CP (O-CU-CP), CU-UP may be referred to as Open CU-UP (O-CU-UP), and RU may be referred to as Open RU (O-RU).

[0100] Among them, any unit among CU (or CU-CP, CU-UP), DU and RU can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. That is, the wireless access network device in this application can be a virtualized device, for example, implemented by general hardware and instantiated virtualization functions, or by dedicated hardware and instantiated virtualization functions. Among them, the general hardware can be a server, such as a cloud server.

[0101] The terminal device in this application may also be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. In the embodiments shown below, terminal device, terminal, and UE may be used interchangeably, but they have the same meaning.

[0102] The terminal device may be a device that provides voice / data connectivity to users, such as a handheld device or vehicle-mounted device with wireless connection function. At present, some examples of terminal devices may include: mobile phones, tablet computers, computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile internet devices (MIDs), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, drones, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). Mobile network, PLMN) terminal equipment, etc.

[0103] Wearable devices, also known as wearable smart devices, are a general term for wearable devices that use wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing, and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not just hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include those that are fully functional, large in size, and can achieve full or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0104] Furthermore, terminal devices can also be end devices in IoT systems. IoT is a crucial component of future information technology development. Its primary technical feature is connecting objects to the internet through communication technologies, thereby enabling intelligent networks that interconnect humans and machines, and objects and things. IoT technology, for example, utilizes narrowband (NB) technology to achieve massive connectivity, deep coverage, and power-saving terminals.

[0105] The terminal device may also be a low-power terminal device, which only includes a low-power receiver or only supports low-power transmission and / or reception functions.

[0106] Terminal devices can also include sensors such as smart printers, train detectors, and gas stations. Their main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0107] The terminal device may also be a virtualized device, for example, implemented by general-purpose hardware and instantiated virtualization functions, or by dedicated hardware and instantiated virtualization functions. The general-purpose hardware may be a server, for example, a cloud server.

[0108] It should be understood that the present application does not limit the specific forms of the wireless access network device and the terminal device.

[0109] Figure 1 is a schematic diagram of the architecture of a communication system 100 applicable to the method provided in an embodiment of the present application. As shown in Figure 1 , the communication system 100 includes a radio access network 10 and a core network 20. Optionally, the communication system 100 may also include the Internet 30. The radio access network 10 may include at least one radio access network device (such as 110a and 110b in Figure 1 ) and at least one terminal device (such as 120a-120j in Figure 1 ).

[0110] Terminal devices can connect wirelessly to radio access network equipment, and radio access network equipment can connect wirelessly or wiredly to the core network. Core network equipment and radio access network equipment can be independent, distinct physical devices, or they can integrate the core network equipment's functions and the radio access network equipment's logical functions into the same physical device. Alternatively, a single physical device can integrate some core network equipment functions and some radio access network equipment functions. Terminals and radio access network equipment can connect to each other via wired or wireless means.

[0111] Wireless access network devices and terminal devices, as well as wireless access network devices and terminal devices, can communicate via licensed spectrum, unlicensed spectrum, or both. They can communicate via spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or both. The embodiments of this application do not limit the spectrum resources used for wireless communications.

[0112] The wireless access network device may be a base station deployed in the air, such as a satellite base station 110a; or a base station deployed indoors, such as a micro base station or an indoor station 110b.

[0113] The terminal device can be a terminal device deployed in the air, such as the helicopter or drone 120i in Figure 1; it can also be a terminal device deployed on the ground, such as the mobile phones 120a, 120e, 120f and 120j, vehicle 120b, computer 120g, printer 120h, etc. in Figure 1.

[0114] Wireless access network equipment and terminal devices can be fixed or mobile. For example, they can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or in the air on aircraft, balloons, and satellites.

[0115] The roles of radio access network devices and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. For devices 120j accessing the radio access network 10 via 120i, 120i is a base station; however, for 110a, 120i is a terminal. That is, communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via an interface protocol between radio access network devices. In this case, 120i is also a base station relative to 110a. Therefore, radio access network devices and terminals can be collectively referred to as communication devices. 110a, 110b, and 120a-120j in Figure 1 can be referred to as communication devices having their respective corresponding functions, such as communication devices having base station functions or communication devices having terminal functions.

[0116] It should be understood that FIG1 is only a schematic diagram, and the communication system may further include other devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG1 .

[0117] With the widespread adoption of IoT communications, more and more IoT devices have been deployed in our lives. Examples include smart water meters, shared bicycles, and devices focused on sensing and data collection for smart cities, environmental monitoring, smart homes, and forest fire prevention. In the future, IoT devices may become even more ubiquitous. For example, they may be embedded in every piece of clothing, every package, every key, and in other words, all offline items will be brought online through the power of IoT technology.

[0118] Currently, IoT communications are still primarily driven by carriers. IoT modules must communicate with base stations using standard cellular protocols. However, since base stations need to cover as large an area as possible, IoT modules must be able to communicate even at great distances from the base stations. This necessitates the use of high-capacity batteries for wireless communication in IoT devices. Battery capacity is generally proportional to battery size, making it difficult to reduce the size of IoT modules and embed IoT into smaller objects. Therefore, using smaller batteries, or even eliminating battery limitations entirely, is imperative to overcome the cost, size, and power consumption constraints of IoT devices.

[0119] The ambient-IoT (A-IoT) discussed in the standard is a type of ultra-low-power IoT device, primarily categorized as active or passive. Active A-IoT devices are active tags or terminals that utilize the energy stored in their own energy storage modules to transmit wireless communication signals. Due to their low power consumption, active A-IoT receivers do not include high-power, high-precision phase-locked loops (PLLs) and thus cannot support coherent demodulation, instead supporting only low-power envelope detection. For example, active A-IoT receivers can receive signals modulated using on-off keying (OOK) or amplitude-shift keying (ASK), or can generate or decode signals without using a fast Fourier transform (FFT) or inverse fast Fourier transform (IFFT), or can receive Manchester-encoded signals.

[0120] The aforementioned OOK modulation is a special form of ASK modulation; 2ASK can also be called OOK. ASK modulation adjusts the carrier amplitude based on the value of the digital signal, while maintaining the carrier frequency and phase. As shown in Figure 2, the transmitted digital signal is a binary signal consisting of 0s and 1s. Compared to the carrier signal, the modulated signal transmits an amplitude signal when a bit is 1 (maintaining the carrier amplitude unchanged), and transmits a different amplitude signal when a bit is 0 (reducing the amplitude to 0). With OOK modulation, each bit (which can be a coded bit) corresponds to a symbol (also called a chip). When a bit is 1, a signal is transmitted within the symbol length (i.e., the signal power is non-zero within the symbol length). When a bit is 0, no signal is transmitted within the symbol length (i.e., the signal power is zero within the symbol length). Alternatively, when a bit is 0, a signal is transmitted within the symbol length (i.e., the signal power is non-zero within the symbol length), while when a bit is 1, no signal is transmitted within the symbol length (i.e., the signal power is zero within the symbol length).

[0121] It should be understood that the electromagnetic wave signal sent by the transmitter (for example, A-IoT) is affected by path loss and shadow fading during the propagation of the wireless channel, resulting in a decrease in the signal strength of the electromagnetic wave signal when it reaches the receiving end. Therefore, when the receiving end is far away from the transmitter, the transmitter can compensate for the effects of path loss and shadow fading by appropriately adjusting the signal transmission power. Although a higher transmission power is beneficial to reducing the block error rate and packet loss rate, improving transmission reliability, and helping to apply higher-order modulation and coding schemes (MCS) to improve spectrum efficiency, it will also cause strong interference to other transmission processes at the same time, and will also consume more energy, which is not conducive to energy saving (especially not conducive to UE battery life). Therefore, the transmitter needs to control the transmission power of its own end so that the transmission power can compensate for the effects of path loss and shadow fading, and can suppress interference between 5G co-frequency cells to meet network coverage and capacity requirements.

[0122] The following describes several methods for determining transmit power in different scenarios.

[0123] 1. In 5G NR, the base station determines the UE's transmit power control (TPC) based on power control configuration parameters, UE feedback information, and base station measurement information, and sends it to the UE through downlink control information (DCI) in the physical downlink control channel (PDCCH). The UE maps the TPC to a power adjustment amount and determines the final uplink transmit power based on information such as the local maximum transmit power, path loss, number of resource blocks (RBs), and transmission format.

[0124] For example, on a certain uplink carrier of a certain cell, the actual transmission power P of the UE satisfies (if the UE is configured with multiple uplink carriers, each carrier is power controlled according to formula (1)): P = min{P CMAX ,{P0(j)+α(j)*PL(q)}+f(l)+10lg(2 u M)+Δ TF}; (1)

[0125] Among them, P CMAX is the maximum uplink transmit power that matches the UE's power level; P0(j)+α(j)*PL(q) is open-loop power control, which mainly refers to power control related to radio resource control (RRC) high-level parameter configuration and partial path loss compensation; P0 is the base station's expected receive power level; α is the partial path loss compensation factor, ranging from 0 to 1 (including 0 and 1); PL(q) is the path loss estimate; q is the index of the reference signal used to measure the path loss (each reference signal is associated with a specific q value); f(l) is closed-loop power control, which mainly refers to power control related to historical transmission power; l is the index of the closed-loop power control adjustment amount; 10lg(2 u M)+Δ TF is other adjustment amount, mainly refers to the power adjustment amount related to frequency domain resource allocation and link adaptation, M is the number of RBs allocated for this uplink transmission, Δ TF The power control of each uplink channel or signal is implemented based on the above basic power control framework and will not be described in detail here.

[0126] The purpose of physical uplink shared channel (PUSCH) power control is to reduce interference to neighboring cells and improve cell throughput, while ensuring data rates for cell-edge users. PUSCH power control is the process by which the base station adjusts the UE's uplink transmit power by adjusting the TPC.

[0127] When a UE initially accesses or switches to a new cell, it uses open-loop power control to determine transmit power. This means the UE calculates the initial transmit power based on the power parameters configured by the base station and the path loss measured by the UE. While services are ongoing, the UE uses a combination of open-loop and closed-loop power control. This means the UE calculates transmit power based on the power parameters configured by the base station and the path loss estimate, and then adaptively adjusts the PUSCH transmit power based on the TPC indicated by the base station to accommodate changes in the PUSCH channel environment and service load.

[0128] Exemplarily, the transmit power of the PUSCH satisfies:

[0129] Where i represents the i-th uplink time slot, P CMAX is the maximum uplink transmit power of UE, P 0_PUSCH (j)+α PUSCH (j)*PL(q) is the open-loop power control part, P 0_PUSCH is the base station's expected received power level per RB, α PUSCH is the path loss compensation factor, PL is the downlink path loss value estimated by the UE, f(l,i) is the closed-loop power control part, that is, the adjustment amount of the UE's PUSCH transmission power, 10lg(2 u M PUSCH (i))+Δ TF (i) is other adjustment quantity, M PUSCH (i) is the number of RBs allocated for this uplink transmission, Δ TF It is the power offset value determined by different MCS levels.

[0130] 3. Narrowband physical random access channel (NPRACH) refers to the preamble used to transmit the random access process. The transmit power of the NPUSCH sent in the i-th time slot of the NB-IoT uplink of serving cell c meets the following requirements:

[0131] Among them, P CMAX,c (i) is the maximum transmit power of the UE configured in the i-th uplink timeslot of the serving cell c. NPUSCH,cThe value of (i) is related to the number of subcarriers and the subcarrier spacing, α c (j) is the path loss compensation factor, α c The value of (j) is between 0 and 1 (including 0 and 1), PL c is the estimated downlink path loss of the UE for the serving cell c, in decibels (dB).

[0132] In the power control mechanisms listed above, the open-loop power control portion requires the terminal device to measure the reference signal to obtain RSRP and then determine path loss based on RSRP. However, A-IoT uses envelope detection for downlink reception and lacks the ability to measure RSRP. Therefore, unlike the terminals in the aforementioned scenario, it cannot determine transmit power by measuring RSRP. Therefore, designing a power control mechanism for A-IoT has become a pressing issue.

[0133] In view of this, the present application provides a power determination method and related devices. In this method, by measuring the first reference signal, the RSSI of the first reference signal or the number of first reference signals required for successful demodulation of the first reference signal is obtained, thereby determining the uplink transmit power based on the measurement result of the first reference signal, thereby solving the problem of determining the uplink transmit power of low-power terminals without RSRP measurement capability.

[0134] To facilitate understanding of the method provided by this application, the following points are first explained:

[0135] First, in the embodiments of this application, prefixes such as "first" and "second" are used solely to distinguish between different items belonging to the same category and do not constrain the order, size, or quantity of the items. For example, "first transmit power" and "second transmit power" are simply different transmit powers; there is no relationship of magnitude or priority between the two.

[0136] Second, the "sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. Sending can include direct sending through the air interface, and can also include indirect sending through the air interface by other units or modules. Receiving can include direct receiving through the air interface, and can also include indirect receiving from other units or modules through the air interface. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0137] In other words, sending and receiving can be carried out between devices, for example, between a terminal device and a network device; or it can be carried out within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0138] It is understood that before information is sent from the source to the destination, it may undergo necessary processing, such as encoding and modulation. After receiving the information from the source, the destination may also perform corresponding processing, such as decoding and demodulation, to interpret the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

[0139] Third, in the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship, but does not exclude the situation where the previous and next associated objects are in an "and" relationship. The specific meaning can be understood in conjunction with the context. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, c can be single or multiple.

[0140] Fourth, the predefined in this application can be understood as: define, predefine, store, pre-store, pre-negotiate, pre-configure, solidify, or pre-burn.

[0141] The method provided in the embodiment of the present application is described in detail below in conjunction with Figure 3. The method can be applied to the communication system shown in Figure 1, but the embodiment of the present application is not limited thereto.

[0142] The flowchart shown in Figure 3 illustrates the method from the perspective of communication device interaction, but this application does not limit the execution entity of the method. For example, the terminal device in Figure 3 can be a chip, chip system, or processor that supports the terminal device to implement the method, or a logic module or software that can implement all or part of the terminal device functions; the network device in Figure 3 can be a chip, chip system, or processor that supports the network device to implement the method, or a logic module or software that can implement all or part of the network device functions.

[0143] FIG3 is a schematic flow chart of a power determination method 300 provided in an embodiment of the present application. As shown in FIG3 , the method 300 may include steps S301 to S304. Each step shown in FIG3 is described in detail below.

[0144] S301: A network device generates a first reference signal.

[0145] The first reference signal may include a first signal and / or a second signal, wherein the first signal is used for time synchronization of the terminal device, and the second signal is used for frequency synchronization of the terminal device.

[0146] Exemplarily, the first signal may be a time synchronization sequence (TSS), which may be a binary sequence selected by the machine with good correlation characteristics and a length of 16; the second signal may be a frequency synchronization sequence (FSS), which may be a single-tone signal and a length of 29 orthogonal frequency division multiplexing (OFDM) symbols.

[0147] Optionally, the first reference signal may further include a physical broadcast channel (PBCH).

[0148] Exemplarily, the first reference signal may be a synchronization signal block (SSB). As shown in FIG4 , the SSB may include a TSS and an FSS, as well as a PBCH.

[0149] S302: The network device sends a first reference signal, and the terminal device receives the first reference signal accordingly.

[0150] S303: The terminal device measures the first reference signal to obtain a measurement result.

[0151] The measurement result may be a received signal strength indicator (RSSI); or the number of first reference signals required to successfully demodulate the first reference signal, or the number of times the first reference signal needs to be repeatedly transmitted when the first reference signal is successfully demodulated.

[0152] S304: The terminal device determines a first transmit power based on the measurement result.

[0153] The first transmit power is the transmit power of uplink transmission. For example, the first transmit power may be the transmit power of an uplink reference signal or the transmit power of uplink data.

[0154] Since the reference signal received power (RSRP) refers to the linear average of the signal power received by the terminal device on all resource units carrying the reference signal within a certain orthogonal frequency division multiplexing (OFDM) symbol duration within the measurement bandwidth. Therefore, when the terminal device is a low-power terminal, due to the limitation of the terminal device's capabilities, it usually supports low-power coherent demodulation and cannot identify the information of the frequency domain RE granularity, resulting in the low-power terminal being unable to measure the RSRP of the reference signal. However, this terminal device that only supports non-coherent demodulation can identify the filter bandwidth, that is, it can identify the information of the bandwidth granularity, and RSSI usually refers to the signal strength of the entire transmission bandwidth. Therefore, the present application obtains the RSSI of the first reference signal or the number of the first reference signals by measuring the first reference signal, thereby determining the uplink transmit power based on the measurement result of the first reference signal. This method can solve the problem of determining the uplink transmit power of low-power terminals without RSRP measurement capability, and at the same time can avoid interference to neighboring cells caused by excessive transmit power.

[0155] The following describes how to determine the first transmit power, using the measurement results of RSSI and the number of first reference signals required for successful demodulation of the first reference signal.

[0156] In example 1, the measurement result is RSSI.

[0157] The terminal device determines the first transmission power based on the measurement result, including: the terminal device determines the first transmission power based on RSSI.

[0158] The following describes in detail how the terminal device determines the first transmission power based on RSSI, combining two possible implementation methods.

[0159] A first possible implementation method is that the terminal device determines the first transmission power based on RSSI, including: the terminal device determines the first transmission power based on RSSI and at least one of the following: a first power offset or a first mapping relationship corresponding to the bandwidth of the uplink transmission.

[0160] The first mapping relationship indicates a one-to-one correspondence between multiple RSSI intervals and multiple transmit powers, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals. Alternatively, the first mapping relationship indicates a one-to-one correspondence between multiple RSSI intervals and multiple transmit powers. Alternatively, the first mapping relationship indicates a one-to-one correspondence between multiple groups of RSSI intervals and multiple transmit powers, and each group of RSSI intervals includes at least two different RSSI intervals, and the RSSI intervals included in any two groups of RSSI intervals are different from each other.

[0161] 1. The terminal device determines the first transmission power based on the RSSI and the first power offset corresponding to the bandwidth of the uplink transmission.

[0162] It should be understood that different uplink transmission bandwidths may also correspond to different power offsets.

[0163] Exemplarily, the terminal device determines a transmit power based on RSSI, and determines a first transmit power based on the transmit power and a first power offset. For example, the first transmit power may be the sum of the transmit power and the first power offset.

[0164] 2. The terminal device determines the first transmission power based on the RSSI and the first mapping relationship.

[0165] Since the first mapping relationship indicates a one-to-one correspondence between multiple RSSI intervals and multiple transmission powers, when the terminal device obtains the RSSI, it can determine the interval to which the RSSI belongs from the multiple intervals indicated by the first mapping relationship, and determine the transmission power corresponding to the interval based on the first mapping relationship. This transmission power can be used as the first transmission power in this application.

[0166] 3. The terminal device determines the first transmission power based on RSSI, the first power offset corresponding to the uplink transmission bandwidth and the first mapping relationship.

[0167] Exemplarily, the terminal device may determine the transmission power corresponding to a reference bandwidth (BW) based on RSSI; and determine the first transmission power based on a first power offset between the transmission power corresponding to the reference bandwidth and the bandwidth of the uplink transmission.

[0168] The reference bandwidth is predefined. The uplink transmission bandwidth refers to the bandwidth of the uplink reference signal or the bandwidth of the uplink data.

[0169] Exemplarily, the terminal device determines the transmission power corresponding to the reference bandwidth based on RSSI, including: determining the transmission power corresponding to the reference bandwidth based on RSSI and a first mapping relationship.

[0170] Table 1

[0171] Table 1 above shows a correspondence between RSSI and transmit power: four RSSI intervals correspond to four transmit powers. Based on the correspondence shown in Table 1, it can be determined that: when the measured RSSI falls within the interval [RSSI1, RSSI2], the transmit power corresponding to the reference bandwidth is P1; when the measured RSSI falls within the interval [RSSI3, RSSI4], the transmit power corresponding to the reference bandwidth is P2; when the measured RSSI falls within the interval [RSSI5, RSSI6], the transmit power corresponding to the reference bandwidth is P3; and when the measured RSSI falls within the interval [RSSI7, RSSI8], the transmit power corresponding to the reference bandwidth is P4.

[0172] Exemplarily, the first power offset corresponding to the bandwidth of the uplink transmission may be determined in the following manner: the terminal device determines the first power offset based on the bandwidth of the uplink transmission and the second mapping relationship.

[0173] In which, the second mapping relationship indicates a one-to-one correspondence between multiple bandwidths and multiple power offsets; or, the second mapping relationship indicates a one-to-one correspondence between multiple bandwidth intervals and multiple power offsets; or, the second mapping relationship indicates a one-to-one correspondence between multiple groups of bandwidths and multiple power offsets, and each group of bandwidths includes at least two different bandwidths, and the bandwidths included in any two groups of bandwidths in the multiple groups of bandwidths are different from each other.

[0174] It should be noted that the multiple power offsets in the second mapping relationship may be determined based on factors such as the bandwidth of uplink transmission, the bandwidth of the first reference signal, the modulation of the first reference signal, and the modulation scheme during uplink transmission.

[0175] Table 2

[0176] Table 2 above shows a correspondence between bandwidth and power offset: four bandwidths correspond to four power offsets. Based on the correspondence shown in Table 2, it can be determined that: when the uplink transmission bandwidth is BW1, the first power offset is A1; when the uplink transmission bandwidth is BW2, the first power offset is A2; when the uplink transmission bandwidth is BW3, the first power offset is A3; and when the uplink transmission bandwidth is BW4, the first power offset is A4.

[0177] For example, the first transmit power may be the sum of the transmit power corresponding to the reference bandwidth and the first power offset corresponding to the bandwidth of the uplink transmission. That is, the first transmit power P1 satisfies: P1=P TX +Δ,

[0178] Among them, P TX is the transmit power corresponding to the reference bandwidth, and Δ is the first power offset.

[0179] Alternatively, the first transmission power P1 satisfies: P1=P TX +BΔ,

[0180] Among them, B is the coefficient of the first power offset, and the meanings of other parameters can be referred to the previous description and will not be repeated here.

[0181] It should be understood that this application does not limit how the terminal device determines the first transmission power based on the transmission power corresponding to the reference bandwidth and the first power offset corresponding to the bandwidth of the uplink transmission. That is, the schemes for determining the first transmission power involving the transmission power corresponding to the reference bandwidth and the first power offset corresponding to the bandwidth of the uplink transmission are all within the scope of protection of this application.

[0182] In a second possible implementation, the terminal device determines the first transmission power based on a relationship between the RSSI and a preset threshold.

[0183] Exemplarily, when the RSSI is less than a preset threshold, the terminal device determines the maximum transmission power of the local end as the first transmission power.

[0184] Exemplarily, when the RSSI is greater than or equal to a preset threshold, the terminal device can determine the first mode power based on the method shown in the first possible implementation method above, or the terminal device can determine the first transmission power based on a multiple relationship between the RSSI and the preset threshold.

[0185] The preset threshold is -174+10*lg A, where A is the bandwidth of uplink transmission. The description of the bandwidth of uplink transmission can be referred to the above description and will not be repeated here.

[0186] Exemplarily, when the RSSI is greater than or equal to a preset threshold, the RSSI may be X (X is greater than 0) times the preset threshold, then the first transmit power may be 1 / Y, where Y is a function of the maximum transmit power of the terminal device.

[0187] It should be noted that, in this application, based on the measurement of the first reference signal, the RSSI value obtained is less than 0.

[0188] For example, if the absolute value of the measured RSSI is taken, an RSSI with a value greater than 0 can be obtained, which is recorded as the absolute RSSI. When determining the first transmit power based on the method shown in the second possible implementation method above, it is also necessary to take the absolute value of the preset threshold value with a value less than 0 to obtain the absolute preset threshold value (for example, -174+10*lg A is modified to 174+10*lg A), and then determine the first transmit power based on the relationship between the two. For example, when the absolute RSSI is greater than the absolute preset threshold value, the first transmit power is determined to be the maximum transmit power of the terminal device; when the absolute RSSI is less than or equal to the absolute preset threshold value, the process of determining the first transmit power can refer to the process of determining the first transmit power when the RSSI is greater than or equal to the preset threshold value, and will not be repeated here.

[0189] In a second example, the measurement result is the number of first reference signals required to successfully demodulate the first reference signal.

[0190] It should be understood that the number of first reference signals required for successfully demodulating the first reference signal is the number of times the first reference signal needs to be repeatedly transmitted when demodulating the first reference signal. Exemplarily, successfully demodulating the first reference signal can be understood as successfully demodulating the cell identifier from the first reference signal.

[0191] Exemplarily, the terminal device determines the first transmit power based on the measurement result, including: the terminal device determines the first transmit power based on the number of first reference signals required to successfully demodulate the above-mentioned first reference signal and the third mapping relationship.

[0192] The third mapping relationship indicates a one-to-one correspondence between multiple values ​​of the number of first reference signals required for successful demodulation of the first reference signal and multiple transmit powers. Alternatively, the third mapping relationship indicates a one-to-one correspondence between multiple transmit powers and multiple first reference signal intervals, where the multiple first reference signal intervals are multiple value intervals of the number of first reference signals required for successful demodulation of the first reference signal.

[0193] In the present application, the method in which the terminal device determines the uplink transmission power based on the number of first reference signals required to successfully demodulate the above-mentioned first reference signal can save RSSI measurement overhead and reduce the design complexity of the terminal device.

[0194] As an optional embodiment, the terminal device determines a coverage level based on the measurement result, where the coverage level indicates a maximum distance over which uplink transmission can be transmitted.

[0195] Exemplarily, the terminal device determines the coverage level based on the measurement result, which may include: the terminal device determines the coverage level based on the measurement result and a fourth mapping relationship.

[0196] The fourth mapping relationship indicates a one-to-one correspondence between multiple measurement results and multiple coverage levels. For example, it may be a one-to-one correspondence between multiple RSSIs and multiple coverage levels; or a one-to-one correspondence between multiple numbers of first reference signals required to successfully demodulate the first reference signal and multiple coverage levels.

[0197] As an optional embodiment, after S304, the method 300 further includes: the terminal device performs uplink transmission based on the first transmission power.

[0198] For the description of uplink transmission, refer to the previous description, for example, the terminal device sends an uplink reference signal to the network device based on the first transmission power, or the terminal device sends uplink data to the network device based on the first transmission power.

[0199] As an optional embodiment, the terminal device may also determine the first transmission power based on scheduling information from the network device.

[0200] For example, when the scheduling information from the network device indicates that channel coding is used for uplink transmission, the terminal device determines the maximum transmit power of the terminal as the first transmit power. This method of determining uplink transmit power based on uplink scheduling information can save RSSI measurement overhead and reduce the design complexity of the terminal device.

[0201] It should be noted that the manner in which the terminal device determines the first transmit power described above can be referred to as an open-loop power control manner, that is, the terminal device directly determines the first transmit power based on the measurement result of the first reference signal, and thus performs uplink transmission based on the first transmit power. However, in some embodiments, the terminal device may also determine the transmit power based on a closed-loop power control manner, that is, after the terminal device determines the first transmit power based on the open-loop power control manner, it further determines the transmit power of the terminal device (referred to as the second transmit power in this application) based on the received power of the reference signal provided by the network device.

[0202] The following describes in detail the process of the terminal device determining the second transmission power.

[0203] Optionally, after S304, the method 300 may further include: the terminal device sending an uplink reference signal to the network device based on the first transmit power. Correspondingly, the network device receives the uplink reference signal and measures the uplink reference signal to obtain RSRP.

[0204] Exemplarily, after the network device obtains the RSRP, the method 300 further includes: the network device sending the RSRP to the terminal device. Accordingly, the terminal device receives the RSRP and determines a second transmit power based on the RSRP and the first transmit power; and transmitting uplink data to the network device based on the second transmit power.

[0205] Exemplarily, after the network device obtains the RSRP, the method 300 further includes: the network device obtains a first transmit power, and determines a second transmit power based on the first transmit power and the RSRP; and sends first information to the terminal device, where the first information indicates the second transmit power.

[0206] In one example, a terminal device or a network device determines a second transmission power based on RSRP and the first transmission power, including: determining a path loss value based on RSRP and the first transmission power; and determining the second transmission power based on the path loss value.

[0207] Exemplarily, the second transmission power P2 in the i-th time slot of the serving cell c satisfies: P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0208] Among them, P CMAX,c (i) is the maximum transmit power of the terminal device configured in the i-th time slot of the serving cell c; M c The value of (i) is related to the number of subcarriers and the subcarrier spacing; c (j) is between 0 and 1, PLc is the downlink path loss value of serving cell c, P O,c (j) is the received power level of each resource unit.

[0209] It should be noted that α c (j) is the path loss compensation factor, j represents the different types of uplink scheduling; PL c The unit is dB; M c The value of (i) may also be related to the bandwidth of the first reference signal, the frequency occupied by the first reference signal, and the frequency of the uplink transmission signal.

[0210] In another example, assuming that the first transmission power corresponds to the first transmission signal, the bandwidth of the first transmission signal is the first bandwidth, the second transmission power corresponds to the second transmission signal, and the bandwidth of the second transmission signal is the second bandwidth, then the above-mentioned terminal device can also determine the second transmission power based on at least one of the following: the ratio of the second bandwidth to the first bandwidth, the ratio of the subcarrier width of the second transmission signal to the subcarrier width of the first transmission signal, or the ratio of the number of subcarriers of the second transmission signal to the number of subcarriers of the first transmission signal, etc.

[0211] In the present application, the uplink transmission power determined by the terminal device using a closed-loop power control method is more reliable than the uplink transmission power determined by an open-loop power control method, and more effectively reduces the interference of the transmission power to the neighboring cells.

[0212] It should be understood that the size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0213] Figures 5 to 8 are schematic diagrams of possible devices provided by embodiments of the present application. These devices can be used to implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.

[0214] FIG5 is a schematic block diagram of a communication device according to an embodiment of the present application. As shown in FIG5 , the communication device (hereinafter referred to as the device) 500 includes a transceiver module 510 and a processing module 520 .

[0215] One possible design is that the apparatus 500 is used to implement the functions of the terminal device in the method embodiment shown in Figure 3. For example, the apparatus 500 may correspond to the terminal device in Figure 1.

[0216] Exemplarily, the transceiver module 510 is used to: receive a first reference signal; the processing module 520 is used to: measure the first reference signal to obtain a measurement result; and determine a first transmit power based on the measurement result, where the first transmit power is the transmit power of uplink transmission.

[0217] Optionally, the first reference signal includes a first signal and / or a second signal, the first signal is used for the apparatus 500 to perform time synchronization, and the second signal is used for the apparatus 500 to perform frequency synchronization.

[0218] Optionally, the first signal is TSS and the second signal is FSS.

[0219] Optionally, the measurement result is RSSI; the processing module 520 is specifically configured to: determine the first transmit power based on the RSSI.

[0220] Optionally, the processing module 520 is specifically used to determine the first transmission power based on the RSSI and at least one of the following: a first power offset or a first mapping relationship corresponding to the bandwidth of the uplink transmission, the first mapping relationship indicating a one-to-one correspondence between multiple RSSI intervals and multiple transmission powers, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals.

[0221] Optionally, the first power offset is determined based on the bandwidth of the uplink transmission and a second mapping relationship, and the second mapping relationship indicates a one-to-one correspondence between at least one bandwidth and at least one power offset.

[0222] Optionally, the processing module 520 is further configured to determine whether the RSSI is greater than or equal to a preset threshold.

[0223] Optionally, the processing module 520 is specifically configured to: when the RSSI is less than a preset threshold, determine that the first transmit power is the maximum transmit power of the terminal device.

[0224] Optionally, the preset threshold is -174+10*lg A, where A is the bandwidth of uplink transmission.

[0225] Optionally, the measurement result is the number of first reference signals required to successfully demodulate the first reference signal.

[0226] Optionally, the processing module 520 is specifically used to: determine the first transmit power based on the number of first reference signals required for successful demodulation of the first reference signal and a third mapping relationship, wherein the third mapping relationship indicates a one-to-one correspondence between multiple values ​​of the number of first reference signals required for successful demodulation of the first reference signal and multiple transmit powers.

[0227] Optionally, the processing module 520 is further configured to: determine a coverage level based on the measurement result, where the coverage level indicates a maximum distance over which the uplink transmission can be transmitted.

[0228] Optionally, the transceiver module 510 is further configured to: perform uplink transmission based on the first transmit power.

[0229] Optionally, the transceiver module 510 is specifically configured to: send an uplink reference signal based on the first transmit power.

[0230] The optional transceiver module 510 is further used to: receive RSRP from the network device, where the RSRP is determined based on the uplink reference signal; the processing module 520 is further used to: determine the second transmit power based on the RSRP and the first transmit power; the transceiver module 510 is further used to: send uplink data based on the second transmit power.

[0231] Optionally, the processing module 520 is specifically configured to: determine a path loss value based on RSRP and the first transmit power; and determine a second transmit power based on the path loss value.

[0232] Optionally, the transceiver module 510 is also used to: receive first information, the first information indicating a second transmit power, the second transmit power determined based on RSRP and the first transmit power, the RSRP determined based on the uplink reference signal; and send uplink data based on the second transmit power.

[0233] Optionally, the second transmission power P2 in the i-th time slot of the serving cell c satisfies: P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0234] Among them, P CMAX,c (i) is the maximum transmit power of the terminal device configured in the i-th time slot of the serving cell c; M c The value of (i) is related to the number of subcarriers and the subcarrier spacing; c (j) is between 0 and 1, P O,c (j) is the received power level of each resource unit, PL c is the downlink path loss value of serving cell c.

[0235] A more detailed description of the transceiver module 510 and the processing module 520 can be directly obtained by referring to the relevant description in the embodiment shown in FIG3 , and is not repeated here.

[0236] Another possible design is that the apparatus 500 is used to implement the functions of the network device in the method embodiment shown in Figure 3. For example, the apparatus 500 may correspond to the access network device in Figure 1.

[0237] Exemplarily, the processing module 520 is used to generate a first reference signal; the transceiver module 510 is used to send the first reference signal

[0238] Optionally, the transceiver module 510 is further configured to: perform uplink transmission based on a first transmit power, where the first transmit power is determined based on a measurement result obtained by measuring the first reference signal.

[0239] Optionally, the transceiver module 510 is specifically used to: receive an uplink reference signal sent from the terminal device based on the first transmit power; the processing module 520 is further used to: determine RSRP based on the uplink reference signal.

[0240] Optionally, the transceiver module 510 is further used to: send RSRP to the terminal device; and receive uplink data sent from the terminal device based on a second transmit power, where the second transmit power is determined based on the first transmit power and RSRP.

[0241] Optionally, the transceiver module 510 is also used to: obtain a first transmission power; the processing module 520 is also used to: determine a second transmission power based on RSRP and the first transmission power; the transceiver module 510 is also used to: send first information, the first information indicating the second transmission power; and receive uplink data sent from the terminal device based on the second transmission power.

[0242] Optionally, the second transmission power P2 in the i-th time slot of the serving cell c satisfies: P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0243] Among them, P CMAX,c (i) is the maximum transmit power of the terminal device configured in the i-th time slot of the serving cell c; M c The value of (i) is related to the number of subcarriers and the subcarrier spacing; c (j) is between 0 and 1, P O,c (j) is the received power level of each resource unit, PL c is the downlink path loss value of serving cell c.

[0244] A more detailed description of the transceiver module 510 and the processing module 520 can be directly obtained by referring to the relevant description in the embodiment shown in FIG3 , and will not be repeated here.

[0245] It should be noted that the apparatus 500 may include a sending module but not a receiving module. Alternatively, the apparatus 500 may include a receiving module but not a sending module. This may depend on whether the above solution executed by the apparatus 500 includes both a sending action and a receiving action.

[0246] Figure 6 is another schematic block diagram of a communication device provided in an embodiment of the present application. As shown in Figure 6, a communication device (hereinafter referred to as the device) 600 includes one or more processors 610. The processor 610 can be a general-purpose processor or a dedicated processor. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the device (such as a terminal device, network device, or chip), execute software programs, and process software program data.

[0247] Optionally, in one design, the processor 610 may include a program (also referred to as code or instructions), which may be executed on the processor 610 to cause the apparatus 600 to perform the method performed by the terminal device or network device in the above method embodiment. In another possible design, the apparatus 600 includes a circuit (not shown in FIG. 6 ) configured to implement the functions of the terminal device or network device in the above method embodiment.

[0248] Exemplarily, the processor 610 may be configured to execute a computer program or instruction in a memory to implement the steps performed by the terminal device or the network device in the method embodiment shown in FIG. 3 .

[0249] Optionally, the device 600 may include one or more memories 620 on which programs (sometimes also referred to as codes or instructions) are stored. The programs can be run on the processor 610 so that the device 600 executes the method executed by the terminal device or network device in the above embodiment.

[0250] Optionally, the processor 610 and / or the memory 620 may include an artificial intelligence (AI) module, which is used to implement AI-related functions. The AI ​​module may be implemented through software, hardware, or a combination of software and hardware. For example, the AI ​​module may include a wireless intelligent controller (RIC) module. For example, the AI ​​module may be a near real-time RIC or a non-real-time RIC.

[0251] Optionally, data may be stored in the processor 610 and / or the memory 620. The processor and the memory may be provided separately or integrated together.

[0252] Optionally, the apparatus 600 may further include a communication interface 630. The processor 610 may also be referred to as a processing unit, which controls the apparatus (e.g., a terminal device or a network device). The communication interface 630 may also be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which implements the transceiver function of the apparatus.

[0253] Optionally, the apparatus 600 further includes a communication interface 630. The processor 610 and the communication interface 630 are coupled to each other. It is understood that the communication interface 630 may be a transceiver or an input / output interface.

[0254] When the apparatus 600 is used to implement the method of FIG3 , the processor 610 is used to perform the functions of the processing module, and the communication interface 630 is used to perform the functions of the transceiver module. Whether the communication interface 630 is used for sending or receiving can be determined by whether the method of the apparatus 600 is used for sending or receiving.

[0255] When the apparatus 600 is a chip implemented in a terminal device, the chip implements the functions of the terminal device in the method embodiment described above. The chip of the terminal device receives signals from other modules in the terminal device (such as a radio frequency module or antenna), which may be signals sent by a network device to the terminal device; or the chip of the terminal device sends signals to other modules in the terminal device (such as a radio frequency module or antenna), which may be signals sent by the terminal device to a network device.

[0256] When the apparatus 600 is a chip used in a network device, the chip implements the functions of the network device in the above method embodiment. The chip of the network device receives a signal from another module in the network device (such as a radio frequency module or antenna), and the signal may be sent by the terminal device to the network device; or the chip of the network device sends a signal to another module in the network device (such as a radio frequency module or antenna), and the signal may be sent by the network device to the terminal device.

[0257] It is understood that when the apparatus 600 is a terminal device or a network device, the communication interface 630 may be a transceiver, specifically including a transmitter and a receiver, where the transmitter is used to transmit signals and the receiver is used to receive signals. When the apparatus 600 is a chip used in a terminal device or a network device, the communication interface 630 may be an input / output circuit, where the input circuit can be used for receiving and the output interface can be used for transmitting.

[0258] FIG7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device 700 can be used in the system shown in FIG1 to perform the functions of the terminal device in the above method embodiment. As shown in FIG7, the terminal device 700 includes a processor 701 and a transceiver 702.

[0259] Optionally, the terminal device 700 further includes a memory 703. The processor 701, transceiver 702, and memory 703 can communicate with each other via an internal connection path to transmit control and / or data signals. The memory 703 is used to store a computer program, and the processor 701 is used to call and execute the computer program from the memory 703 to control the transceiver 702 to transmit and receive signals. Optionally, the terminal device 700 may further include an antenna 704 for transmitting uplink data or uplink control signaling output by the transceiver 702 via wireless signals.

[0260] The processor 701 and the memory 703 may be combined into a processing device, and the processor 701 is configured to execute program code stored in the memory 703 to implement the aforementioned functions. In a specific implementation, the memory 703 may also be integrated into the processor 701 or independent of the processor 701. The processor 701 may correspond to the processing module in FIG5 or the processor in FIG6.

[0261] The transceiver 702 may correspond to the transceiver module in FIG5 or the communication interface in FIG6 , and may also be referred to as a transceiver unit. The transceiver 702 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0262] It should be understood that the terminal device 700 shown in FIG7 is capable of implementing each step related to the terminal device in the method embodiment shown in FIG3 . The operations and / or functions of each module in the terminal device 700 are respectively for implementing the corresponding processes in the above method embodiment. For details, please refer to the description of the above method embodiment. To avoid repetition, detailed description is omitted here.

[0263] The processor 701 can be used to execute the actions implemented within the terminal device described in the previous method embodiments, and the transceiver 702 can be used to execute the actions of the terminal device sending to or receiving from the network device described in the previous method embodiments. For details, please refer to the description of the previous method embodiments, which will not be repeated here.

[0264] Optionally, the terminal device 700 may further include a power supply 705 for providing power to various devices or circuits in the terminal device 700 .

[0265] In addition, in order to make the functions of the terminal device more complete, the terminal device 700 can also include one or more of an input unit 706, a display unit 707, an audio circuit 708, a camera 709 and a sensor 710, and the audio circuit can also include a speaker 708a, a microphone 708b, etc.

[0266] Figure 8 is a schematic diagram of the structure of a radio access network device provided in an embodiment of the present application, for example, a base station. The base station 800 can be used in the system shown in Figure 1 to perform the functions of the network device in the above-described method embodiment. As shown in the figure, the base station 800 may include one or more of the following: one or more (DU+RU) units 810 and one or more CUs 820. The CU 820 can communicate with the next generation core (NG core). The DU may include at least one antenna 811, at least one radio frequency unit 812, at least one processor 813, and at least one memory 814. The DU portion is primarily used for transmitting and receiving radio frequency signals, converting radio frequency signals into baseband signals, and performing partial baseband processing. The CU 820 may include at least one processor 822 and at least one memory 821. The CU 820 and the DU may communicate via an interface. The control plane (CP) interface may be an Fs-C, such as F1-C, and the user plane (UP) interface may be an Fs-U, such as F1-U. The DU and RU may collaborate to implement physical (PHY) layer functions. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement mid-RF functions. For another example, the DU is configured to implement high-layer functions in the PHY layer, and the RU is configured to implement low-layer functions and RF functions in the PHY layer. The high-layer functions in the PHY layer may include a portion of the functions of the PHY layer that is closer to the MAC layer, and the low-layer functions in the PHY layer may include another portion of the functions of the PHY layer that is closer to the mid-RF side.

[0267] The CU 820 is primarily used for baseband processing and base station control. The DU and CU 820 may be physically located together or separately, i.e., in a distributed base station. The CU 820 is the control center of the base station and may correspond to the processing module in FIG5 or the processor in FIG6 , and may also be referred to as a processing unit. It is primarily used to perform baseband processing functions. For example, the CU 820 may be used to control the base station to execute the operational procedures for the network device in the above-described method embodiment.

[0268] Specifically, baseband processing on the CU and DU can be divided according to the protocol layers of the wireless network. For example, the functions of the packet data convergence protocol (PDCP) layer and above are set in the CU, while the functions of the protocol layers below PDCP, such as the RLC layer and the MAC layer, are set in the DU. For another example, the CU implements the functions of the RRC layer and the PDCP layer, while the DU implements the functions of the RLC layer, the MAC layer, and the PHY layer.

[0269] In addition, optionally, the base station 800 may include one or more radio frequency units (RUs), one or more DUs, and one or more CUs. The DU may include at least one processor 813 and at least one memory 814, the RU may include at least one antenna 811 and at least one radio frequency unit 812, and the CU may include at least one processor 822 and at least one memory 821.

[0270] In one example, the CU 820 may be composed of one or more single boards, and the multiple single boards may jointly support a wireless access network with a single access indication (such as a 5G network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 821 and the processor 822 may serve one or more single boards. That is, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, a circuit may be provided on each single board. The DU may be composed of one or more single boards, and the multiple single boards may jointly support a wireless access network with a single access indication (such as a 5G network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks). The memory 814 and the processor 813 may serve one or more single boards. That is, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may be provided on each single board.

[0271] It should be understood that base station 800 shown in FIG8 is capable of implementing the various processes involving network devices in the method embodiment shown in FIG3 . The operations and / or functions of the various modules in base station 800 are respectively for implementing the corresponding processes in the aforementioned method embodiment. For details, please refer to the description of the aforementioned method embodiment; to avoid repetition, detailed descriptions are omitted here.

[0272] It should be understood that the base station 800 shown in FIG8 is only one possible architecture of a radio access network device and does not constitute any limitation on the present application. The method provided in the present application is applicable to network devices of other architectures. For example, radio access network devices including CUs, DUs, and AAUs. The present application does not limit the specific architecture of the radio access network device.

[0273] It should be understood that FIG8 is merely an example and not a limitation, and the radio access network device may not rely on the structure shown in FIG8 . For example, the radio access network device may also include an AAU, a CU, and / or a DU, or the radio access network device may also include a BBU and an adaptive radio unit (ARU). This application is not limited to this.

[0274] The CU and / or DU described above can be used to perform the actions implemented within the radio access network device described in the previous method embodiments, while the AAU can be used to perform the actions described in the previous method embodiments where the radio access network device sends or receives information to or from the terminal device. For details, please refer to the description in the previous method embodiments and will not be repeated here.

[0275] It should be noted that the above method embodiments can be applied to or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by hardware integrated logic circuits in the processor or by software instructions.

[0276] 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, a discrete gate or transistor logic device, a discrete hardware component, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0277] The steps of the method disclosed in the embodiments of this application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0278] The present application also provides a computer-readable medium having a computer program stored thereon, which implements the functions of the above-mentioned method embodiment when executed by a computer.

[0279] The present application also provides a computer program product comprising instructions, which implements the functions of the above method embodiments when executed by a computer.

[0280] The memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0281] The methods provided in the above embodiments can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, they can be implemented in whole or in part in the form of a computer program product. The computer program product may include one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network or other programmable device. 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 via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic disk), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)). Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0282] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0283] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0284] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0285] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0286] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0287] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A method for determining power, characterized in that: Applied to terminal equipment, including: receiving a first reference signal; Measuring the first reference signal to obtain a measurement result; Based on the measurement result, a first transmit power is determined, where the first transmit power is the transmit power of uplink transmission.

2. The method according to claim 1, characterized in that: The first reference signal includes a first signal and / or a second signal, the first signal is used for the terminal device to perform time synchronization, and the second signal is used for the terminal device to perform frequency synchronization.

3. The method according to claim 2, characterized in that The first signal is a time synchronization sequence TSS, and the second signal is a frequency synchronization sequence FSS.

4. The method according to any one of claims 1 to 3, characterized in that The measurement result is a received signal strength indication RSSI; The determining, based on the measurement result, a first transmit power, includes: Based on the RSSI, the first transmit power is determined.

5. The method according to claim 4, characterized in that The determining the first transmit power based on the RSSI includes: The first transmit power is determined based on the RSSI and at least one of the following: a first power offset or a first mapping relationship corresponding to the bandwidth of the uplink transmission, the first mapping relationship indicating a one-to-one correspondence between multiple RSSI intervals and multiple transmit powers, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals.

6. The method according to claim 5, characterized in that The first power offset is determined based on the bandwidth of the uplink transmission and a second mapping relationship, and the second mapping relationship indicates a one-to-one correspondence between at least one bandwidth and at least one power offset.

7. The method according to any one of claims 4 to 6, characterized in that The method further comprises: It is determined that the RSSI is greater than or equal to a preset threshold.

8. The method according to claim 4, characterized in that The determining the first transmit power based on the RSSI includes: When the RSSI is less than a preset threshold, the first transmission power is determined to be the maximum transmission power of the terminal device.

9. The method according to claim 7 or 8, characterized in that: The preset threshold is -174+10*lg A, where A is the bandwidth of the uplink transmission.

10. The method according to any one of claims 1 to 3, characterized in that The measurement result is the number of first reference signals required to successfully demodulate the first reference signal; The determining the first transmit power based on the measurement result includes: The first transmit power is determined based on the number of first reference signals required for successfully demodulating the first reference signal and a third mapping relationship, wherein the third mapping relationship indicates a one-to-one correspondence between multiple values ​​of the number of first reference signals required for successfully demodulating the first reference signal and multiple transmit powers.

11. The method according to any one of claims 1 to 10, characterized in that The method further comprises: Based on the measurement result, a coverage level is determined, where the coverage level indicates a maximum distance over which the uplink transmission can be transmitted.

12. The method according to any one of claims 1 to 11, characterized in that The method further comprises: Perform uplink transmission based on the first transmit power.

13. The method according to claim 12, characterized in that The performing uplink transmission based on the first transmit power includes: An uplink reference signal is sent based on the first transmit power.

14. The method according to claim 13, characterized in that The method further comprises: receiving an RSRP from a network device, wherein the RSRP is determined based on the uplink reference signal; Determining a second transmit power based on the RSRP and the first transmit power; Uplink data is sent based on the second transmit power.

15. The method according to claim 14, characterized in that The determining, based on the RSRP and the first transmit power, a second transmit power, includes: Determining a path loss value based on the RSRP and the first transmit power; Based on the path loss value, the second transmit power is determined.

16. The method according to claim 13, characterized in that The method further comprises: receiving first information, where the first information indicates a second transmit power, where the second transmit power is determined based on RSRP and the first transmit power, where the RSRP is determined based on the uplink reference signal; Uplink data is sent based on the second transmit power.

17. The method according to any one of claims 14 to 16, characterized in that The second transmission power P2 in the i-th time slot of the serving cell c satisfies: P2 = min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))}; Among them, P CMAX,c (i) is the maximum transmission power of the terminal device configured in the i-th time slot of the serving cell c; M c The value of (i) is related to the number of subcarriers and / or the subcarrier spacing; α c (j) is between 0 and 1, P O,c (j) is the received power level of each resource unit, PL c is the downlink path loss value of serving cell c.

18. A method for determining power, characterized in that: include: generating a first reference signal; The first reference signal is sent.

19. The method according to claim 18, characterized in that The method further comprises: Uplink transmission is performed based on a first transmit power, where the first transmit power is determined based on a measurement result obtained by measuring the first reference signal.

20. The method according to claim 19, characterized in that The performing uplink transmission based on the first transmit power includes: Receiving an uplink reference signal sent from a terminal device based on a first transmit power; A reference signal received power RSRP is determined based on the uplink reference signal.

21. The method according to claim 20, characterized in that The method further comprises: Sending the RSRP to the terminal device; Receive uplink data sent from the terminal device based on a second transmit power, where the second transmit power is determined based on the first transmit power and the RSRP.

22. The method according to claim 20, characterized in that The method further comprises: Acquire the first transmit power; Determining a second transmit power based on the RSRP and the first transmit power; sending first information, where the first information indicates the second transmit power; Receive uplink data sent from the terminal device based on the second transmission power.

23. The method according to claim 21 or 22, characterized in that The second transmission power P2 in the i-th time slot of the serving cell c satisfies: P2 = min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))}; Among them, P CMAX,c (i) is the maximum transmission power of the terminal device configured in the i-th time slot of the serving cell c; M c The value of (i) is related to the number of subcarriers and / or the subcarrier spacing; α c (j) is between 0 and 1, P O,c (j) is the received power level of each resource unit, PL c is the downlink path loss value of serving cell c.

24. A communication device, characterized in that: Comprising means for implementing the method as claimed in any one of claims 1 to 23.

25. A communication device, characterized in that: The device comprises a processor configured to enable the communication device to implement the method according to any one of claims 1 to 23 by executing a computer program and / or a logic circuit.

26. The device according to claim 25, characterized in that The system also includes a memory for storing a computer program and / or a configuration file of the logic circuit.

27. The device according to claim 25 or 26, characterized in that A communication interface is also included for inputting and / or outputting signals.

28. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 17 is executed, or the method according to any one of claims 18 to 23 is executed.

29. A computer program product, characterized in that The method comprises a computer program, and when the computer program is executed, the method according to any one of claims 1 to 17 is executed, or the method according to any one of claims 18 to 23 is executed.

30. A communication system, characterized in that: It comprises a terminal device and a network device, wherein the terminal device is used to implement the method according to any one of claims 1 to 17, and the network device is used to implement the method according to any one of claims 18 to 23.

Images