Power determination method and related device

Abstract

The invention provides a power determination method and a related device, and the method comprises the steps: network equipment generates a first reference signal, and transmits the first reference signal to terminal equipment; the terminal equipment receives the first reference signal from the network equipment and measures the first reference signal to obtain a measurement result; and the terminal equipment determines first transmitting power based on the measurement result, and the first transmitting power is transmitting power of uplink transmission. According to the method provided by the invention, the power control of the low-power-consumption terminal (such as an A-IoT terminal) without the RSRP measurement capability is realized.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular to a power determination method and related devices. Background Art

[0002] With the popularization of Internet of Things (IoT) communication, more and more IoT devices are appearing in people's lives. In order to further popularize IoT, for example, IoT modules must be implanted in smaller objects, smaller batteries must be used to get rid of battery limitations, or a method of reducing the power consumption of radio transceivers must be designed to overcome the limitations of IoT devices such as cost, size, and power consumption.

[0003] Therefore, low-power IoT devices have become a research focus. Low-power ambient IoT (A-IoT) is a type of ultra-low-power IoT device, which can be divided into active and passive types. Among them, active A-IoT receivers do not include high-power, high-precision phase-locked loops (PLL) and other modules, cannot support coherent demodulation, only support low-power envelope detection, and do not have the ability to measure reference signal received power (RSRP). As a result, this type of A-IoT receiver cannot achieve power control by measuring and feeding back RSRP like traditional terminal devices. Summary of the invention

[0004] The present application provides a power determination method and related devices, which implement power control of a low-power terminal without RSRP measurement capability.

[0005] In a first aspect, the present application provides a power determination method. The method can be applied to a terminal device. For example, it can be executed by the terminal device, or it can also be executed by a component configured in the terminal device (such as a chip, a chip system, etc.), or it can also be implemented by a logic module or software that can implement all or part of the functions of the terminal device, and the present application does not limit this.

[0006] 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.

[0007] 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.

[0008] Exemplarily, the first signal may be a time synchronization sequence (TSS), and the second signal may be a frequency synchronization sequence (FSS). TSS may be a binary sequence selected from a machine with good correlation characteristics, with a length of 16; FSS may be a single tone signal, with a length of 29 orthogonal frequency division multiplexing (OFDM) symbols.

[0009] Optionally, the first reference signal may also include a physical broadcast channel (PBCH).

[0010] 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.

[0011] 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.

[0012] 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 (orthogonalfrequency 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 (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 for successfully demodulating 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, and the method can solve the problem of determining the uplink transmit power of a low-power terminal without RSRP measurement capability, and can avoid interference to neighboring cells caused by excessive transmit power.

[0013] Accordingly, the measurement result is RSSI.

[0014] 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.

[0015] In combination with the first aspect, in certain implementations of the first aspect, determining the first transmit power based on the RSSI includes: determining the first transmit 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 transmit powers, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals.

[0016] Example 1: The terminal device determines a first transmission power based on RSSI and a first power offset corresponding to the bandwidth of the uplink transmission.

[0017] It should be understood that different uplink transmission bandwidths may correspond to different power offsets.

[0018] 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.

[0019] Example 2: The terminal device determines the first transmission power based on RSSI and the first mapping relationship.

[0020] 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.

[0021] 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.

[0022] Exemplarily, the terminal device determines the transmit power corresponding to the reference bandwidth based on RSSI; and determines the first transmit power based on the transmit power corresponding to the reference bandwidth and a first power offset corresponding to the bandwidth of the uplink transmission.

[0023] The reference bandwidth may be predefined. The bandwidth of uplink transmission may be understood as the bandwidth used when the terminal device sends an uplink reference signal or uplink data to the network device.

[0024] 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.

[0025] 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.

[0026] In the present 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 the present application.

[0027] The first power offset corresponding to the bandwidth of the uplink transmission may be determined in the following manner: the first power offset is determined based on the bandwidth of the uplink transmission and a second mapping relationship, wherein the second mapping relationship indicates a one-to-one correspondence between multiple bandwidths and multiple power offsets.

[0028] It should be understood that the multiple bandwidths indicated by the second mapping relationship are different from each other.

[0029] 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, and the power offset is the first power offset in the present application.

[0030] Exemplarily, the first transmit power P1 satisfies:

[0031] P1=P TX +Δ,

[0032] Among them, P TX is the transmit power corresponding to the above reference bandwidth, and Δ is the first power offset.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In combination with the first aspect, in some implementations of the first aspect, determining the first transmit power based on the RSSI includes: when the RSSI is less than a preset threshold, determining the first transmit power as the maximum transmit power of the terminal device.

[0038] Exemplarily, the above preset threshold is -174+10*lg A, where A is the bandwidth of uplink transmission.

[0039] It should be understood that the maximum transmit power of a terminal device is the maximum power that can be used by the terminal device for uplink transmission.

[0040] It should also be understood that the maximum transmission power corresponding to different terminal devices is generally different.

[0041] It should be noted that, in the present application, based on measuring the first reference signal, the RSSI value obtained is less than 0.

[0042] Exemplarily, 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 value 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.

[0043] 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.

[0044] Accordingly, the measurement result is the number of first reference signals required to successfully demodulate the first reference signal.

[0045] The number of first reference signals required for successfully demodulating the first reference signal can be understood as the number of times the first reference signal needs to be repeatedly sent 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.

[0046] 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.

[0047] 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, after the terminal device determines the number of first reference signals required for successful demodulation of the first reference signal, it can determine the value that is the same as the number from the multiple values ​​indicated by the third mapping relationship, 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.

[0048] 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, the coverage level indicating a maximum distance over which the uplink transmission can be transmitted.

[0049] 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 the 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 for successful demodulation of the first reference signal and multiple coverage levels.

[0050] 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.

[0051] Exemplarily, the performing uplink transmission based on the first transmit power includes: sending an uplink reference signal based on the first transmit power.

[0052] In combination with the first aspect, in some 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.

[0053] Optionally, the method further includes: receiving RSRP from a network device; determining a second transmit power based on 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.

[0054] Exemplarily, the terminal device may determine the third transmit power based on RSRP and the first transmit power, and determine the 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.

[0055] 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.

[0056] The method in which the terminal device determines the uplink transmit power based on the RSRP from the network device and the first transmit 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 transmit power to the neighboring cells.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] Exemplarily, the second transmit power P2 in the i-th time slot of the serving cell c satisfies:

[0061] 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 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 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.

[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, and 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 point occupied by the first reference signal, and the frequency point where the uplink transmission signal is located.

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

[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 transmit power, where the first transmit power is determined by a measurement result obtained by the terminal device based on measuring 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 certain 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 a terminal device; and receiving uplink data sent from the terminal device based on a second transmit power.

[0070] The second transmission power is determined by the terminal device based on RSRP and the first transmission power. The specific process can refer to the description in the first aspect, which 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, wherein the first information indicates 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 combination with the second aspect, in some implementations of the second aspect, the second transmit power P2 in the i-th time slot of the serving cell c satisfies:

[0074] P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0075] For the relevant description of each parameter in the above formula, please refer to the first aspect and will not be repeated here.

[0076] In a third aspect, the present application provides a communication device, including 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.

[0077] In a fourth aspect, the present application provides a communication device, comprising a processor, wherein the processor is used to execute the method described in any of the above aspects and any possible implementation of any of the aspects.

[0078] The device 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 methods described in the above aspects may be implemented.

[0079] The apparatus may further include a communication interface, and 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.

[0080] 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 of the aspects, for example, receiving or processing the data and / or information involved in the above method.

[0081] In one possible design, the chip system also includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0082] The chip system may be composed of the chip, or may include the chip and other discrete devices.

[0083] In a sixth aspect, the present application provides a computer-readable storage medium, including a computer program, which, when executed on a computer, enables the computer to implement any of the above aspects and any possible implementation of any of the aspects.

[0084] 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.

[0085] In an eighth aspect, the present application provides a communication system, comprising the aforementioned terminal device and network device.

[0086] 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

[0087] Figure 1 It is a schematic diagram of the architecture of a communication system applicable to the method provided in the embodiment of the present application;

[0088] Figure 2 It is a schematic diagram of ASK modulation;

[0089] Figure 3 is a schematic flow chart of a power determination method provided in an embodiment of the present application;

[0090] Figure 4 is a schematic diagram of an SSB structure provided in an embodiment of the present application;

[0091] Figure 5 and Figure 6 is a schematic block diagram of a communication device provided in an embodiment of the present application;

[0092] Figure 7 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0093] Figure 8 It is a structural diagram of a wireless access network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0094] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0095] The technical solution 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), sidelink (SL) communication system, worldwide 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).

[0096] 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.

[0097] The radio access network (RAN) device in this application is a device with wireless transceiver function. The radio access network device can provide wireless communication function services and can access the terminal to the wireless network. The radio access network device can be a node in the radio access network, referred to as a RAN node.

[0098] In a possible scenario, a RAN node may be a base station (BS), an evolved NodeB (eNodeB), a transmission reception point (TRP), a home evolved NodeB (or home Node B, HNB), an access point (AP) of wireless fidelity (Wi-Fi), 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 may also be a device that performs base station functions in a device to device (D2D) communication system, a vehicle to everything (V2X) communication system, a machine to machine (M2M) communication system, and an Internet of Things (IoT) communication system. A RAN node may also be a RAN node in a non terrestrial network (NTN), that is, a RAN node may be deployed on a high altitude platform or a satellite. The RAN node can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, or a wireless controller in a cloud radio access network (CRAN) scenario, a node in an open radio access network (O-RAN or ORAN) scenario, etc. Optionally, the RAN node can also be a server, a wearable device, a vehicle or an onboard device, etc. For example, the RAN node in the V2X technology can be a road side unit (RSU). Of course, the RAN node can also be a node in the core network.

[0099] In another possible scenario, multiple RAN nodes collaborate to assist the terminal device 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 can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH).

[0100] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called an open CU (O-CU), DU may also be called an open DU (O-DU), CU-CP may also be called an open CU-CP (O-CU-CP), CU-UP may also be called an open CU-UP (O-CU-UP), and RU may also be called an open RU (O-RU).

[0101] Among them, any unit in CU (or CU-CP, CU-UP), DU and RU can be implemented by software module, hardware module, or a combination of software module and 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 special hardware and instantiated virtualization functions. Among them, the general hardware can be a server, such as a cloud server.

[0102] The terminal device in this application may also be referred to as user equipment (UE), access terminal, user unit, user 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 their meanings are the same.

[0103] 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 can be: mobile phones, tablet computers, computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile Internet devices (MID), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, drones, wireless terminals in remote medical, 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 (public land mobile communication networks) Mobile network, PLMN) terminal equipment, etc.

[0104] Among them, wearable devices can also be called wearable smart devices, which are a general term for the intelligent design and development of wearable devices for daily wear using wearable technology, 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 clothes or accessories. Wearable devices are not only hardware devices, but also realize powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, 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.

[0105] In addition, the terminal device can also be a terminal device in the IoT system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. IoT technology can achieve massive connections, deep coverage, and terminal power saving through narrow band (NB) technology, for example.

[0106] 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.

[0107] 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.

[0108] The terminal device may also be a virtualized device, for example, implemented by general hardware and instantiated virtualization functions, or by dedicated hardware and instantiated virtualization functions. The general hardware may be a server, for example, a cloud server.

[0109] It should be understood that the present application does not limit the specific forms of the wireless access network equipment and the terminal equipment.

[0110] Figure 1 1 is a schematic diagram of the architecture of a communication system 100 applicable to the method provided in the embodiment of the present application. Figure 1 As shown, the communication system 100 includes a wireless access network 10 and a core network 20. Optionally, the communication system 100 may also include the Internet 30. The wireless access network 10 may include at least one wireless access network device (such as Figure 1 110a and 110b), and may also include at least one terminal device (such as Figure 1 120a-120j in FIG.

[0111] Terminal equipment can be connected to wireless access network equipment by wireless means, and wireless access network equipment can be connected to the core network by wireless or wired means. The core network equipment and wireless access network equipment can be independent and different physical devices, or the functions of the core network equipment and the logical functions of the wireless access network equipment can be integrated on the same physical device, or part of the functions of the core network equipment and part of the functions of the wireless access network equipment can be integrated on one physical device. Terminals and wireless access network equipment can be connected to each other by wired or wireless means.

[0112] The wireless access network device and the terminal device, the wireless access network device and the terminal device can communicate through the authorized spectrum, can also communicate through the unlicensed spectrum, or can communicate through the authorized spectrum and the unlicensed spectrum at the same time; can communicate through the spectrum below 6 gigahertz (GHz), can communicate through the spectrum above 6 GHz, and can also communicate using the spectrum below 6 GHz and the spectrum above 6 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0113] The wireless access network device may be a base station deployed in the air, such as a satellite base station 110a; or may be a base station deployed indoors, such as a micro base station or an indoor station 110b.

[0114] The terminal device may be a terminal device deployed in the air, such as Figure 1 The helicopter or drone 120i in the figure can also be a terminal device deployed on the ground, such as Figure 1 The mobile phones 120a, 120e, 120f and 120j, the vehicle 120b, the computer 120g, the printer 120h, etc.

[0115] Wireless access network equipment and terminal equipment can be fixed or mobile. For example, wireless access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed in the air on aircraft, balloons and artificial satellites.

[0116] The roles of wireless access network equipment and terminals can be relative. For example, Figure 1 The helicopter or drone 120i in the figure can be configured as a mobile base station. For those 120j that access the wireless access network 10 through 120i, 120i is a base station; but for 110a, 120i is a terminal, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between wireless access network devices. In this case, relative to 110a, 120i is also a base station. Therefore, wireless access network devices and terminals can be collectively referred to as communication devices. Figure 1 110a, 110b and 120a-120j in the figure can be called communication devices having their respective corresponding functions, such as communication devices having base station functions, or communication devices having terminal functions.

[0117] It should be understood that Figure 1 This is just a schematic diagram. The communication system may also include other devices, such as wireless relay devices and wireless backhaul devices. Figure 1 Not drawn in.

[0118] With the popularization of IoT communication, more and more IoT devices have been deployed in people's lives. For example: smart water meters, shared bicycles, and devices for sensing and data collection such as smart cities, environmental monitoring, smart homes, and forest fire prevention. In the future, IoT devices may be even more ubiquitous. For example, IoT devices may be embedded in every piece of clothing, every package, every key, or all offline items will be online with the empowerment of IoT technology.

[0119] At present, IoT communication is still mainly driven by operators, that is, IoT modules need to use standard cellular protocols to communicate with base stations. However, since base stations need to cover as large an area as possible, IoT modules need to be able to communicate even when they are far away from base stations. This requires IoT devices to use higher capacity batteries to work during wireless communication. The capacity of the battery is generally positively correlated with the size of the battery, which makes it difficult to reduce the size of the IoT module and embed IoT into smaller items. Therefore, it is imperative to use smaller batteries or even completely get rid of the limitations of batteries to overcome the limitations of IoT devices such as cost, size, and power consumption.

[0120] The low-power ambient IoT (A-IoT) being discussed in the standard is a type of ultra-low-power IoT device, which is mainly divided into active and passive types. Among them, the active A-IoT is an active tag or active terminal that can use the energy stored in its own energy storage module to complete the transmission of wireless communication signals. Considering the low power consumption characteristics, the active A-IoT receiver does not include high-power, high-precision phase-locked loops (PLL) and other modules, so it cannot support coherent demodulation, but only supports low-power envelope detection. For example, the active A-IoT receiver is a receiver that can receive signals modulated by on-off key (OOK) or amplitude-shift keying (ASK), or a receiver that can generate or decode signals without fast Fourier transform (FFT) or inverse fast Fourier transform (IFFT), or a receiver that can receive Manchester-coded signals.

[0121] The above OOK is a special form of ASK modulation, that is, 2ASK can be called OOK. ASK modulation adjusts the amplitude of the carrier according to the value of the digital signal, while the frequency and phase of the carrier remain unchanged. Figure 2As shown, the transmitted digital signal is in binary form consisting of 0 and 1. Compared with the carrier signal, the modulated signal transmits an amplitude signal (keeping the carrier amplitude unchanged) when the bit is 1, and transmits another amplitude signal (the amplitude becomes 0) when the bit is 0. When OOK modulation is used, each bit (the bit can be a coded bit) corresponds to a symbol (also called a chip). When the bit is 1, a signal is sent within the symbol length (that is, the signal power within the symbol length is not 0). When the bit is 0, no signal is sent within the symbol length (that is, the signal power within the symbol length is 0). Alternatively, when the bit is 0, a signal is sent within the symbol length (that is, the signal power within the symbol length is not 0), and when the bit is 1, no signal is sent within the symbol length (that is, the signal power within the symbol length is 0).

[0122] 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 signal strength when the electromagnetic wave signal reaches the receiving end. Therefore, when the receiving end is far away from the transmitter, the transmitter can compensate for the impact of path loss and shadow fading by appropriately adjusting the signal transmission power. Although a higher transmission power is conducive to reducing the block error rate and packet loss rate, improving transmission reliability, and helping to apply a higher-order modulation and coding scheme (MCS) to improve spectrum efficiency; it will also cause strong interference to other transmission processes at the same time, and will 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 this end so that the transmission power can compensate for the impact of path loss and shadow fading, and can suppress interference between 5G co-frequency cells to meet network coverage and capacity requirements.

[0123] The following describes several methods for determining transmit power in different scenarios.

[0124] 1. In 5G NR, the base station side 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 the 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 the maximum transmit power of the local end, path loss, number of resource blocks (RBs), and transmission format.

[0125] For example, on a certain uplink carrier of a certain cell, the actual transmit power P of the UE satisfies (if the UE is configured with multiple uplink carriers, each carrier is power controlled according to formula (1)):

[0126] P = min {P CMAX ,{P0(j)+α(j)*PL(q)}+f(l)+10lg(2 u M)+Δ TF}; (1)

[0127] Among them, P CMAX is the maximum uplink transmission power that matches the power level of the UE; P0(j)+α(j)*PL(q) is open-loop power control, which mainly refers to the power control related to the high-level parameter configuration of radio resource control (RRC) and partial path loss compensation, P0 is the expected receiving power level of the base station, α is the partial path loss compensation factor, and its value range is: 0~1 (including 0 and 1), PL(q) is the path loss estimation, 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 the power control related to the historical transmission power, and 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 It is the adjustment amount related to the uplink transmission format. The power control of each uplink channel or signal is implemented in the basic framework of the above power control, which will not be described here.

[0128] 2. The purpose of physical uplink shared channel (PUSCH) power control is to reduce interference to neighboring cells and improve cell throughput while ensuring the rate of cell edge users. PUSCH power control is the process by which the base station adjusts the UE uplink transmit power by adjusting TPC.

[0129] When the UE initially accesses or switches to a new cell, it uses open-loop power control to determine the transmit power, that is, 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. During the service continuation process, the UE uses a combination of open-loop power control and closed-loop power control, that is, the UE calculates the transmit power based on the power parameters configured by the base station and the path loss estimation results, and continues to adaptively adjust the PUSCH transmit power based on the TPC indicated by the base station to adapt to changes in the PUSCH channel environment and service load.

[0130] Exemplarily, the transmit power of PUSCH satisfies:

[0131] P PUSCH (i) = min{P CMAX ,{P 0_PUSCH (j)+α PUSCH (j)*PL(q)}+f(l,i)+

[0132] 10lg(2 u M PUSCH (i))+Δ TF (i)}; (2)

[0133] Where i represents the i-th uplink time slot, P CMAX is the maximum uplink transmit power of the 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 transmit 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.

[0134] 3. Narrowband physical random access channel (NPRACH) refers to the preamble used to transmit the random access process. The transmission power of the NPUSCH sent in the i-th time slot of the NB-IoT uplink of the serving cell c satisfies:

[0135] P NPUSCH,c (i) = min{P CMAX,c (i),P 0PUSCH,c (j)+α c (j)*PL c +10lg(M NPUSCH,c (i))}; (3)

[0136] Among them, P CMAX,c (i) is the maximum UE transmit power configured in the i-th uplink timeslot of serving cell c. NPUSCH,c The 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).

[0137] In the power control mechanisms listed above, the open-loop power control part requires the terminal device to measure the reference signal to obtain RSRP and determine the path loss based on RSRP. However, for A-IoT, the downlink receiving method is envelope detection, which does not have the ability to measure RSRP. Therefore, it is impossible to determine the transmission power by measuring RSRP like the terminal in the above scenario. Therefore, for A-IoT, how to design a power control mechanism has become an urgent problem to be solved.

[0138] 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 successfully demodulating the first reference signal is obtained, so that the uplink transmission power is determined based on the measurement result of the first reference signal, thereby solving the problem of determining the uplink transmission power of a low-power terminal without RSRP measurement capability.

[0139] To facilitate understanding of the method provided by this application, the following points are first explained:

[0140] First, in the embodiments of the present application, the use of prefixes such as "first" and "second" is only to facilitate the distinction and description of different things belonging to the same name category, and does not restrict the order, size or quantity of the things. For example, "first transmission power" and "second transmission power" are just different transmission powers, and there is no size relationship or priority relationship between the two.

[0141] Second, the "sending" and "receiving" in the embodiments of the present application indicate the direction of signal transmission. Sending may include direct sending through the air interface, and may also include indirect sending through the air interface by other units or modules. Receiving may include direct receiving through the air interface, and may also include indirect receiving from other units or modules through the air interface. "Sending" may also be understood as the "output" of the chip interface, and "receiving" may also be understood as the "input" of the chip interface.

[0142] In other words, sending and receiving can be performed between devices, for example, between a terminal device and a network device; it can also be performed 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.

[0143] It is understandable that before the information is sent from the source end to the destination end, it may be subjected to necessary processing, such as encoding, modulation, etc. After receiving the information from the source end, the destination end may also perform corresponding processing, such as decoding, demodulation, etc., so as to interpret the valid information from the source end. Similar expressions in this application can be understood similarly and will not be repeated.

[0144] 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: A exists alone, A and B exist at the same time, and B exists 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 it 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" 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.

[0145] Fourth, the pre-defined in the present application can be understood as: define, pre-define, store, pre-store, pre-negotiate, pre-configure, solidify, or pre-burn.

[0146] Combine the following Figure 3 , describes in detail the method provided in the embodiment of the present application. The method can be applied to Figure 1 The communication system shown, but the embodiments of the present application are not limited to this.

[0147] exist Figure 3 In the flowchart shown, the method is illustrated from the perspective of the interaction of the communication device, but the present application does not limit the execution subject of the method. Figure 3 The terminal device in the method may be a chip, a chip system, or a processor that supports the terminal device to implement the method, or may be a logic module or software that can implement all or part of the functions of the terminal device; Figure 3 The network device in the method may be a chip, a chip system, or a processor that supports the network device to implement the method, or may be a logic module or software that can implement all or part of the network device functions.

[0148] Figure 3 is a schematic flow chart of a power determination method 300 provided in an embodiment of the present application. Figure 3 As shown, the method 300 may include S301 to S304. Figure 3 The steps shown.

[0149] S301: A network device generates a first reference signal.

[0150] 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.

[0151] Exemplarily, the first signal may be a time synchronization sequence (TSS), which may be a binary sequence selected by a 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.

[0152] Optionally, the first reference signal may also include a physical broadcast channel (PBCH).

[0153] Exemplarily, the first reference signal may be a synchronization signal block (SSB), such as Figure 4 As shown, the SSB may include TSS and FSS, as well as PBCH.

[0154] S302: The network device sends a first reference signal. Correspondingly, the terminal device receives the first reference signal.

[0155] S303: The terminal device measures the first reference signal to obtain a measurement result.

[0156] The above 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 sent when the first reference signal is successfully demodulated.

[0157] S304: The terminal device determines a first transmission power based on the measurement result.

[0158] 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.

[0159] 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 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 a low-power terminal without RSRP measurement capability, and can avoid interference to neighboring cells caused by excessive transmit power.

[0160] How to determine the first transmit power is described below using the measurement results of RSSI and the number of first reference signals required for successfully demodulating the first reference signal.

[0161] Example 1: The measurement result is RSSI.

[0162] 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.

[0163] The following describes in detail how the terminal device determines the first transmission power based on RSSI, in combination with two possible implementation methods.

[0164] 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.

[0165] The first mapping relationship indicates that multiple RSSI intervals correspond to multiple transmission powers one-to-one, and the RSSI belongs to one RSSI interval among the multiple RSSI intervals. Alternatively, the first mapping relationship indicates that multiple RSSIs correspond to multiple transmission powers one-to-one. Alternatively, the first mapping relationship indicates that multiple groups of RSSIs correspond to multiple transmission powers one-to-one, and each group of RSSIs includes at least two different RSSIs, and the RSSIs included in any two groups of RSSIs among the multiple groups of RSSIs are different from each other.

[0166] 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.

[0167] It should be understood that different uplink transmission bandwidths may correspond to different power offsets.

[0168] 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.

[0169] 2. The terminal device determines the first transmission power based on the RSSI and the first mapping relationship.

[0170] 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.

[0171] 3. 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.

[0172] Exemplarily, the terminal device may determine the transmit power corresponding to a reference bandwidth (BW) based on RSSI; and determine the first transmit power based on a first power offset between the transmit power corresponding to the reference bandwidth and the bandwidth of the uplink transmission.

[0173] The reference bandwidth is predefined. The bandwidth of uplink transmission refers to the bandwidth of the uplink reference signal or the bandwidth of uplink data.

[0174] Exemplarily, the terminal device determines the transmit power corresponding to the reference bandwidth based on RSSI, including: determining the transmit power corresponding to the reference bandwidth based on RSSI and a first mapping relationship.

[0175] Table 1

[0176] Transmit power RSSI P1 [RSSI1, RSSI2] P2 [RSSI3, RSSI4] P3 [RSSI5, RSSI6] P4 [RSSI7, RSSI8]

[0177] Table 1 above shows a correspondence between RSSI and transmit power: 4 RSSI intervals correspond to 4 transmit powers one by one. Based on the correspondence shown in Table 1, it can be determined that: when the measured RSSI belongs to the interval [RSSI1, RSSI2], the transmit power corresponding to the reference bandwidth is P1; when the measured RSSI belongs to the interval [RSSI3, RSSI4], the transmit power corresponding to the reference bandwidth is P2; when the measured RSSI belongs to the interval [RSSI5, RSSI6], the transmit power corresponding to the reference bandwidth is P3: when the measured RSSI belongs to the interval [RSSI7, RSSI8], the transmit power corresponding to the reference bandwidth is P4.

[0178] 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.

[0179] Among them, 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.

[0180] 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 the uplink transmission, the bandwidth of the first reference signal, the modulation of the first reference signal, and the modulation scheme during uplink transmission.

[0181] Table 2

[0182] bandwidth Power offset BW1 A1 BW2 A2 BW3 A3 BW4 A4

[0183] Table 2 above shows a correspondence between bandwidth and power offset: 4 bandwidths correspond to 4 power offsets one by one. Based on the correspondence shown in Table 2, it can be determined that: when the bandwidth of uplink transmission is BW1, the first power offset is A1; when the bandwidth of uplink transmission is BW2, the first power offset is A2; when the bandwidth of uplink transmission is BW3, the first power offset is A3; when the bandwidth of uplink transmission is BW4, the first power offset is A4.

[0184] Exemplarily, 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:

[0185] P1=P TX +Δ,

[0186] Among them, P TX is the transmit power corresponding to the reference bandwidth, and Δ is the first power offset.

[0187] Alternatively, the first transmission power P1 satisfies:

[0188] P1=P TX +BΔ,

[0189] 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.

[0190] It should be understood that this application does not limit how the terminal device determines the first transmit power based on the transmit 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 transmit power involving the transmit 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.

[0191] In a second possible implementation, the terminal device determines the first transmission power based on a relationship between RSSI and a preset threshold.

[0192] Exemplarily, when the RSSI is less than a preset threshold, the terminal device determines the maximum transmission power of the terminal as the first transmission power.

[0193] 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 above-mentioned first possible implementation method, or the terminal device can determine the first transmission power based on the multiple relationship between the RSSI and the preset threshold.

[0194] 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 refer to the above description, which will not be repeated here.

[0195] 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, and the first transmit power may be 1 / Y, where Y is a function of the maximum transmit power of the terminal device.

[0196] It should be noted that, in the present application, based on measuring the first reference signal, the RSSI value obtained is less than 0.

[0197] Exemplarily, 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 described 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 size 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, which will not be repeated here.

[0198] Example 2: The measurement result is the number of first reference signals required to successfully demodulate the first reference signal.

[0199] 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 sent when demodulating the first reference signal. Exemplarily, successfully demodulating the first reference signal can be understood as successfully demodulating a cell identifier from the first reference signal.

[0200] 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 for successfully demodulating the first reference signal and the third mapping relationship.

[0201] 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, wherein 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.

[0202] The method in the present application 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.

[0203] 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 the uplink transmission can be transmitted.

[0204] 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 the fourth mapping relationship.

[0205] 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 multiple numbers of the number of first reference signals required for successfully demodulating the first reference signal and multiple coverage levels.

[0206] As an optional embodiment, after S304, the method 300 further includes: the terminal device performs uplink transmission based on the first transmission power.

[0207] The description of uplink transmission may 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.

[0208] As an optional embodiment, the terminal device may also determine the first transmission power based on scheduling information from the network device.

[0209] Exemplarily, when the scheduling information from the network device indicates that the uplink transmission adopts channel coding, the terminal device determines the maximum transmit power of the local end as the first transmit power. This method of determining the uplink transmit power based on the uplink scheduling information can save RSSI measurement overhead and reduce the design complexity of the terminal device.

[0210] 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.

[0211] The following describes in detail the process of the terminal device determining the second transmission power.

[0212] Optionally, after S304, the method 300 may further include: the terminal device sends 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.

[0213] Exemplarily, after the network device obtains the RSRP, the method 300 further includes: the network device sends the RSRP to the terminal device. Correspondingly, the terminal device receives the RSRP and determines the second transmit power based on the RSRP and the first transmit power; and sends uplink data to the network device based on the second transmit power.

[0214] Exemplarily, after the network device obtains 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 RSRP; and sends first information to the terminal device, where the first information indicates the second transmit power.

[0215] In one example, a terminal device or a network device determines a second transmit power based on RSRP and the first transmit power, including: determining a path loss value based on RSRP and the first transmit power; and determining the second transmit power based on the path loss value.

[0216] Exemplarily, the second transmit power P2 in the i-th time slot of the serving cell c satisfies:

[0217] P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0218] 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 the subcarrier spacing; α c (j) between 0 and 1, PL c is the downlink path loss value of serving cell c, P O,c (j) is the received power level of each resource unit.

[0219] It should be noted that α c (j) is the path loss compensation factor, j represents 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 point occupied by the first reference signal, and the frequency point where the uplink transmission signal is located.

[0220] 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.

[0221] 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.

[0222] It should be understood that the sequence numbers of the above processes do 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.

[0223] Figures 5 to 8 Schematic diagram of possible devices provided by the 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 possessed by the above method embodiments.

[0224] Figure 5 is a schematic block diagram of a communication device provided in an embodiment of the present application. Figure 5 As shown, the communication device (hereinafter referred to as device) 500 includes a transceiver module 510 and a processing module 520.

[0225] One possible design is that the device 500 is used to implement the above Figure 3 The functions of the terminal device in the method embodiment shown in FIG. For example, the device 500 may correspond to Figure 1 The terminal device in.

[0226] 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.

[0227] 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.

[0228] Optionally, the first signal is TSS and the second signal is FSS.

[0229] Optionally, the measurement result is RSSI; the processing module 520 is specifically used to: determine the first transmit power based on the RSSI.

[0230] 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.

[0231] Optionally, the first power offset is determined based on a 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.

[0232] Optionally, the processing module 520 is further configured to: determine whether the RSSI is greater than or equal to a preset threshold.

[0233] Optionally, the processing module 520 is specifically used to: when the RSSI is less than a preset threshold, determine that the first transmission power is the maximum transmission power of the terminal device.

[0234] Optionally, the preset threshold is -174+10*lg A, where A is the bandwidth of uplink transmission.

[0235] Optionally, the measurement result is the number of first reference signals required to successfully demodulate the first reference signal.

[0236] 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.

[0237] 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.

[0238] Optionally, the transceiver module 510 is further used to: perform uplink transmission based on the first transmit power.

[0239] Optionally, the transceiver module 510 is specifically configured to: send an uplink reference signal based on the first transmit power.

[0240] The optional transceiver module 510 is also used to: receive RSRP from the network device, where the RSRP is determined based on the uplink reference signal; the processing module 520 is also used to: determine the second transmit power based on RSRP and the first transmit power; the transceiver module 510 is also used to: send uplink data based on the second transmit power.

[0241] Optionally, the processing module 520 is specifically used 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.

[0242] Optionally, the transceiver module 510 is also used to: receive 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 the uplink reference signal; and send uplink data based on the second transmit power.

[0243] Optionally, the second transmit power P2 in the i-th time slot of the serving cell c satisfies:

[0244] P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))}

[0245] 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 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.

[0246] For a more detailed description of the transceiver module 510 and the processing module 520, please refer to Figure 3 The relevant description in the illustrated embodiment is directly obtained and will not be repeated here.

[0247] Another possible design is that the device 500 is used to implement the above Figure 3 The function of the network device in the method embodiment shown in FIG. For example, the device 500 may correspond to Figure 1 Access network equipment in.

[0248] 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

[0249] Optionally, the transceiver module 510 is further used 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.

[0250] Optionally, the transceiver module 510 is specifically used to: receive an uplink reference signal sent from a terminal device based on a first transmit power; the processing module 520 is also used to: determine RSRP based on the uplink reference signal.

[0251] 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.

[0252] 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, wherein the first information indicates the second transmission power; and receive uplink data sent from the terminal device based on the second transmission power.

[0253] Optionally, the second transmit power P2 in the i-th time slot of the serving cell c satisfies:

[0254] P2=min{P CMAX,c (i),P O,c (j)+α c (j)*PL c +10lg(M c (i))};

[0255] 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 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.

[0256] For a more detailed description of the transceiver module 510 and the processing module 520, please refer to Figure 3 The relevant description in the illustrated embodiment is directly obtained and will not be repeated here.

[0257] It should be noted that the device 500 may include a sending module but not a receiving module. Alternatively, the device 500 may include a receiving module but not a sending module. Specifically, it depends on whether the above solution executed by the device 500 includes a sending action and a receiving action.

[0258] Figure 6 is another schematic block diagram of a communication device provided in an embodiment of the present application. Figure 6As shown, the communication device (hereinafter referred to as the device) 600 includes one or more processors 610. The processor 610 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may be used to control the device (such as a terminal device, a network device or a chip, etc.), execute the software program, and process the data of the software program.

[0259] Optionally, in one design, the processor 610 may include a program (also referred to as code or instruction), which may be executed on the processor 610 to enable the apparatus 600 to execute the method executed by the terminal device or network device in the above method embodiment. In another possible design, the apparatus 600 includes a circuit ( Figure 6 (not shown), the circuit is used to implement the functions of the terminal device or network device in the above method embodiment.

[0260] For example, the processor 610 may be configured to execute computer programs or instructions in the memory to implement Figure 3 The steps shown are performed by a terminal device or a network device in the method embodiment.

[0261] 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 embodiments.

[0262] Optionally, the processor 610 and / or the memory 620 may include an artificial intelligence (AI) module, and the AI ​​module is used to implement AI-related functions. The AI ​​module may be implemented by 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.

[0263] Optionally, data may also be stored in the processor 610 and / or the memory 620. The processor and the memory may be provided separately or integrated together.

[0264] Optionally, the device 600 may further include a communication interface 630. The processor 610 may also be sometimes referred to as a processing unit, which controls a device (e.g., a terminal device or a network device). The communication interface 630 may also be sometimes referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which is used to implement the transceiver function of the device.

[0265] Optionally, the device 600 further includes a communication interface 630. The processor 610 and the communication interface 630 are coupled to each other. It can be understood that the communication interface 630 can be a transceiver or an input-output interface.

[0266] When the device 600 is used to implement Figure 3 When the method is used, the processor 610 is used to execute the functions of the above processing module, and the communication interface 630 is used to execute the functions of the above transceiver module. Whether the communication interface 630 is used to send or receive can be determined by whether it is used to perform a sending action or a receiving action in the solution executed by the device 600.

[0267] When the above-mentioned device 600 is a chip applied to a terminal device, the chip implements the functions of the terminal device in the above-mentioned method embodiment. The chip of the terminal device receives a signal from other modules (such as a radio frequency module or an antenna) in the terminal device, and the signal may be sent by the network device to the terminal device; or the chip of the terminal device sends a signal to other modules (such as a radio frequency module or an antenna) in the terminal device, and the signal may be sent by the terminal device to the network device.

[0268] When the above-mentioned device 600 is a chip applied to a network device, the chip implements the functions of the network device in the above-mentioned method embodiment. The chip of the network device receives a signal from other modules (such as a radio frequency module or an antenna) in the network device, 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 other modules (such as a radio frequency module or an antenna) in the network device, and the signal may be sent by the network device to the terminal device.

[0269] It can be understood that when the device 600 is a terminal device or a network device, the communication interface 630 can be a transceiver, which can specifically include a transmitter and a receiver, the transmitter is used to send signals, and the receiver is used to receive signals. When the device 600 is a chip applied to a terminal device or a network device, the communication interface 630 can be an input-output circuit, wherein the input circuit can be used for receiving, and the output interface can be used for sending.

[0270] Figure 7 Schematic diagram of the structure of the terminal device provided in the embodiment of the present application. Figure 7 As shown, the terminal device 700 can be applied to Figure 1 In the system shown, the functions of the terminal device in the above method embodiment are performed. Figure 7 As shown, the terminal device 700 includes a processor 701 and a transceiver 702 .

[0271] Optionally, the terminal device 700 further includes a memory 703. The processor 701, the transceiver 702 and the memory 703 can communicate with each other through 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 run the computer program from the memory 703 to control the transceiver 702 to send and receive signals. Optionally, the terminal device 700 may also include an antenna 704, which is used to send the uplink data or uplink control signaling output by the transceiver 702 through a wireless signal.

[0272] The processor 701 and the memory 703 may be combined into a processing device, and the processor 701 is used to execute the program code stored in the memory 703 to implement the above functions. In specific implementation, the memory 703 may also be integrated into the processor 701, or independent of the processor 701. Figure 5 The processing module in Figure 6 The processor in corresponds to .

[0273] The transceiver 702 can be used with Figure 5 The transceiver module in Figure 6 The communication interface in the communication device 702 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.

[0274] It should be understood that Figure 7 The terminal device 700 shown can implement Figure 3 The method embodiment shown involves various steps of the terminal device. The operations and / or functions of each module in the terminal device 700 are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0275] The processor 701 can be used to execute the actions implemented by the terminal device in the previous method embodiment, and the transceiver 702 can be used to execute the actions of the terminal device sending to or receiving from the network device in the previous method embodiment. Please refer to the description in the previous method embodiment for details, which will not be repeated here.

[0276] 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 .

[0277] In addition, in order to make the functions of the terminal device more complete, the terminal device 700 may 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 may also include a speaker 708a, a microphone 708b, etc.

[0278] Figure 8 800 is a schematic diagram of the structure of a wireless access network device provided in an embodiment of the present application, for example, a schematic diagram of the structure of a base station. The base station 800 can be applied to Figure 1 In the system shown, the functions of the network device in the above method embodiment are executed. As shown in the figure, the base station 800 may include one or more of the following: one or more (DU+RU) 810, one or more CU820. CU 820 can communicate with the next generation core network (NG core). The DU may include at least one antenna 811, at least one radio unit 812, at least one processor 813 and at least one memory 814. The DU part is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals to baseband signals, as well as partial baseband processing. CU820 may include at least one processor 822 and at least one memory 821. CU 820 and DU can communicate through interfaces. Among them, the control plane (CP) interface may be Fs-C, such as F1-C, and the user plane (UP) interface may be Fs-U, such as F1-U. DU and RU can cooperate to jointly implement the functions of the physical (PHY) layer. A DU can be connected to one or more RUs. The functions of DU and RU can be configured in a variety of ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the mid-RF function. For another example, the DU is configured to implement the high-layer function in the PHY layer, and the RU is configured to implement the low-layer function and the RF function in the PHY layer. The high-layer function in the PHY layer may include a part of the function of the PHY layer, which is closer to the MAC layer, and the low-layer function in the PHY layer may include another part of the function of the PHY layer, which is closer to the mid-RF side.

[0279] The CU 820 is mainly used for baseband processing and controlling the base station. The DU and CU 820 can be physically arranged together or physically separated, that is, a distributed base station. The CU 820 is the control center of the base station and can correspond to Figure 5 The processing module in Figure 6The processor in the CU 820 may also be referred to as a processing unit, which is mainly used to complete the baseband processing function. For example, the CU 820 may be used to control the base station to execute the operation flow of the network device in the above method embodiment.

[0280] Specifically, the baseband processing on the CU and DU can be divided according to the protocol layer of the wireless network, for example, the functions of the packet data convergence protocol (PDCP) layer and above are set in the CU, and the functions of the protocol layers below the 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, and the DU implements the functions of the RLC layer, the MAC layer, and the PHY layer.

[0281] 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.

[0282] In one example, the CU 820 may be composed of one or more boards, and the multiple 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 boards. In other words, a memory and a processor may be separately set on each board. It is also possible that multiple boards share the same memory and processor. In addition, necessary circuits may be provided on each board. The DU may be composed of one or more boards, and the multiple 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 boards. In other words, a memory and a processor may be separately set on each board. It is also possible that multiple boards share the same memory and processor. In addition, necessary circuits may be provided on each board.

[0283] It should be understood that Figure 8 The base station 800 shown is capable of implementing Figure 3 The illustrated method embodiment involves various processes of the network device. The operations and / or functions of various modules in the base station 800 are respectively for implementing the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0284] It should be understood that Figure 8 The base station 800 shown is only a possible architecture of a wireless access network device and should not constitute any limitation to the present application. The method provided in the present application can be applied to network devices of other architectures. For example, wireless access network devices including CU, DU and AAU, etc. The present application does not limit the specific architecture of the wireless access network device.

[0285] It should be understood that Figure 8 For example only and not limitation, the wireless access network device may not rely on Figure 8 For example, the wireless access network device may include an AAU, and may also include a CU and / or a DU, or the wireless access network device may include a BBU, and may also include an adaptive radio unit (ARU). This application is not limited to this.

[0286] The above CU and / or DU can be used to perform the actions implemented by the wireless access network device in the previous method embodiment, and the AAU can be used to perform the actions sent by the wireless access network device to the terminal device or received from the terminal device in the previous method embodiment. Please refer to the description in the previous method embodiment for details, which will not be repeated here.

[0287] It should be noted that the above method embodiments can be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.

[0288] 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.

[0289] The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0290] The present application also provides a computer-readable medium on which a computer program is stored. When the computer program is executed by a computer, the functions of the above method embodiments are implemented.

[0291] 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.

[0292] 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 (DDRSDRAM), 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.

[0293] The method provided in the above embodiment can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it 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 a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital user (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. 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. 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 hard disk (SSD)), etc. Those of ordinary skill 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 to be beyond the scope of this application.

[0294] Those skilled in the art can 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.

[0295] In the several embodiments provided in the present 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 only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, 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.

[0296] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0297] 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.

[0298] 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 can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0299] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope 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 an 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.

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