Power control method and apparatus

Abstract

A power control method and apparatus, capable of determining the transmit power of a sensing signal to implement the transmission of the sensing signal, and capable of flexibly adjusting the transmit power of the sensing signal and the transmit power of a communication signal. The method comprises: a terminal determines first transmit power and second transmit power, sends a sensing signal on a first time unit on the basis of the first transmit power, and sends a communication signal on the first time unit on the basis of the second transmit power. The first transmit power and the second transmit power meet the constraint of the maximum transmit power of the terminal. The first transmit power is transmit power obtained after third transmit power is adjusted by means of a first power control factor, and the second transmit power is transmit power obtained after fourth transmit power is adjusted by means of a second power control factor. The third transmit power is transmit power taking into account first path loss (such as sensing path loss), or expected transmit power taking into account the sensing signal. The fourth transmit power is transmit power taking into account second path loss (such as communication path loss).

Description

Power control method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on January 31, 2024, with application number 202410139337.4 and application name “Power Control Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and in particular to a power control method and apparatus. Background Art

[0003] Integrated sensing and communication (ISAC) is a key component of sixth-generation (6G) mobile communications. By leveraging hardware and software resources within a single system, ISAC provides both high-quality communication and high-precision sensing capabilities, reducing costs and improving system performance. Communication functions encompass traditional data transmission, while sensing functions include ranging, velocity, angle measurement, imaging, and detection.

[0004] With the development of ISAC technology, future base stations and terminals will increasingly require both communication and sensing capabilities. This means terminals may need to transmit both communication signals and sensing signals. In this scenario, determining the transmit power of sensing signals is a pressing issue.

[0005] Summary of the Invention

[0006] The present application provides a power control method and apparatus, which can determine the transmission power of a perception signal and implement the transmission of the perception signal.

[0007] In a first aspect, a communication method is provided. The method can be performed by a first communication device, or by a component of the first communication device, such as a processor, chip, or chip system of the first communication device, or by a logic module or software that implements all or part of the functions of the first communication device. The first communication device can be a terminal, meaning the method can be performed by the terminal or a component of the terminal, such as a processor, chip, or chip system, or by a logic module or software that implements part or all of the functions of the terminal. The method includes determining a first transmit power and a second transmit power, and transmitting a perception signal in a first time unit based on the first transmit power, and transmitting a communication signal in the first time unit based on the second transmit power. The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. The first transmit power is the product of the first power control factor and the third transmit power, and the second transmit power is the product of the second power control factor and the fourth transmit power. The third transmit power is determined based on the maximum transmit power of the terminal and a fifth transmit power, the fifth transmit power is determined based on the first path loss, or the fifth transmit power is the expected transmit power of the perception signal. The fourth transmit power is determined based on the maximum transmit power of the terminal and the second path loss.

[0008] Based on this solution, the first communication device can determine the transmit power of the perception signal and transmit the perception signal. Furthermore, the first communication device uses the product of the first power control factor and the third transmit power as the transmit power of the perception signal (i.e., the first transmit power), and uses the product of the second power control factor and the fourth transmit power as the transmit power of the communication signal (i.e., the second transmit power). This allows the transmit power of the perception signal and the communication signal to be dynamically and flexibly adjusted using the first power control factor and the second power control factor, so that the sum of the first transmit power and the second transmit power satisfies the maximum transmit power constraint of the terminal. This enables the simultaneous transmission of the perception signal and the communication signal, satisfying the requirements for simultaneous perception and communication.

[0009] In one possible design, the third transmit power satisfies the following relationship:

[0010] P sense (i) = min(P CMAX ,P sense,PL (i))

[0011] Among them, P sense (i) represents the third transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the fifth transmission power, and min() represents a minimum value operation.

[0012] In one possible design, the third transmit power is determined based on the maximum transmit power of the terminal, the fifth transmit power, and the sixth transmit power, wherein the sixth transmit power is determined based on at least one of a channel busy ratio (CBR), a channel occupancy rate (CR), or a perceived priority.

[0013] Based on this possible design, at least one of CBR, CR or perception priority is taken into account when determining the transmission power of the perception signal, so that it can be applicable to the perception and communication integration scenario in the distributed system, and improve the accuracy of the transmission power determined in this scenario, thereby ensuring the performance of communication and perception.

[0014] In one possible design, the third transmit power satisfies the following relationship:

[0015] P sense (i) = min(P CMAX ,P sense,C ,P sense,PL (i))

[0016] Among them, P sense (i) represents the third transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the fifth transmission power, P sense,C represents the sixth transmission power, and min() represents the minimum value operation.

[0017] In one possible design, the fifth transmit power is determined based on the first path loss and at least one of the following: a first expected received power on a single resource block RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, a first subcarrier configuration factor, or a first closed-loop power control parameter.

[0018] Based on this possible design, closed-loop power control is taken into account when determining the transmit power of the perception signal, so that the RAN node can adjust the transmit power of the terminal, improving the accuracy and rationality of the determined transmit power, thereby ensuring the performance of communication and perception.

[0019] In one possible design, the fifth transmit power satisfies the following relationship:

[0020] or,

[0021] Among them, P sense,PL (i) represents the fifth transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on a single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the sensing signal in time unit i, α sense Indicates the first path loss compensation factor, PL sense represents the first path loss, f sense Indicates the first closed-loop power control parameter.

[0022] In one possible design, the fourth transmit power is determined based on the maximum transmit power of the terminal, the second path loss, and at least one of the following: the second expected receive power on a single RB, the second path loss compensation factor, the number of RBs occupied by the communication signal, the second subcarrier configuration factor, the second closed-loop power control parameter, or the power offset value, and the power offset value is determined by the modulation and coding scheme MCS of the communication signal.

[0023] In one possible design, when the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal and the communication priority is higher than the perception priority, determining the first transmit power includes: adjusting the first power control factor so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. Alternatively, when the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal and the communication priority is lower than the perception priority, determining the second transmit power includes: adjusting the second power control factor so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal.

[0024] Based on this possible design, the first communication device can adjust the first power control factor or the second power control factor based on priority, thereby dynamically and flexibly adjusting the transmit power of the perception signal and the communication signal, so that the sum of the first transmit power and the second transmit power meets the maximum transmit power constraint of the terminal. In addition, adjusting the power control factor of low-priority signals based on priority can ensure the transmit power of high-priority signals, thereby ensuring the performance of high-priority signals.

[0025] In one possible design, when the perception priority is higher than the communication priority, the first transmit power minus the second transmit power is greater than or equal to a first threshold. Alternatively, when the communication priority is higher than the perception priority, the second transmit power minus the first transmit power is greater than or equal to a second threshold.

[0026] Based on this possible design, it can be ensured that the difference between the transmission power of the high-priority high signal and the transmission power of the low-priority signal is greater than or equal to the threshold, thereby reducing the interference of the low-priority signal on the high-priority signal and ensuring the transmission performance of the high-priority signal.

[0027] In a second aspect, a communication method is provided. The method can be performed by a first communication device, or by a component of the first communication device, such as a processor, chip, or chip system of the first communication device, or by a logic module or software that implements all or part of the functions of the first communication device. The first communication device can be a terminal, meaning the method can be performed by the terminal or a component of the terminal, such as a processor, chip, or chip system, or by a logic module or software that implements part or all of the functions of the terminal. The method includes determining a first transmit power and a second transmit power, and transmitting a perception signal in a first time unit based on the first transmit power, and transmitting a communication signal in the first time unit based on the second transmit power. The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. When the perception priority is higher than the communication priority, the first transmit power is determined based on the maximum transmit power of the terminal and a third transmit power, the third transmit power being determined based on the first path loss, or the third transmit power being the expected transmit power of the perception signal, and the second transmit power being the difference between the maximum transmit power of the terminal and the first transmit power. Alternatively, when the communication priority is higher than the perception priority, the first transmit power is the difference between the maximum transmit power of the terminal and the second transmit power, and the second transmit power is determined based on the maximum transmit power of the terminal and the second path loss.

[0028] Based on this solution, the first communication device can determine the transmit power of the perception signal and transmit the perception signal. Furthermore, the first communication device prioritizes the transmit power of high-priority signals based on priority, and uses the remaining power as the transmit power of low-priority signals. This ensures that the sum of the first and second transmit powers meets the maximum transmit power constraint of the terminal, thereby enabling the simultaneous transmission of the perception signal and the communication signal, meeting the requirements of simultaneous perception and communication.

[0029] In one possible design, the first transmit power satisfies the following relationship:

[0030] P sense (i) = min(P CMAX ,P sense,PL (i))

[0031] Among them, P sense (i) represents the first transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the third transmission power, and min() represents a minimum value operation.

[0032] In one possible design, the first transmit power is determined based on a maximum transmit power of the terminal, a third transmit power, and a fourth transmit power, wherein the fourth transmit power is determined based on at least one of a channel busy ratio (CBR), a channel occupancy rate (CR), or a perception priority.

[0033] In one possible design, the first transmit power satisfies the following relationship:

[0034] P sense (i) = min(P CMAX ,P sense,C ,P sense,PL (i))

[0035] Among them, P sense (i) represents the first transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the third transmission power, P sense,C represents the fourth transmission power, and min() represents the minimum value operation.

[0036] In one possible design, the third transmit power is determined based on the first path loss and at least one of the following: a first expected received power on a single resource block RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, a first subcarrier configuration factor, or a first closed-loop power control parameter.

[0037] In one possible design, the third transmit power satisfies the following relationship:

[0038] or,

[0039] Among them, P sense,PL (i) represents the third transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on a single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the sensing signal in time unit i, α sense Indicates the first path loss compensation factor, PL sense represents the first path loss, f sense Indicates the first closed-loop power control parameter.

[0040] In one possible design, the second transmit power is determined based on the maximum transmit power of the terminal, the second path loss, and at least one of the following: a second expected receive power on a single RB, a second path loss compensation factor, the number of RBs occupied by the communication signal, a second subcarrier configuration factor, a second closed-loop power control parameter, or a power offset value, and the power offset value is determined by the modulation and coding scheme MCS of the communication signal.

[0041] In one possible design, when the perception priority is higher than the communication priority, the second transmit power satisfies the following relationship:

[0042] P comm (i) = P CMAX -P sense (i)

[0043] Alternatively, when the communication priority is higher than the perception priority, the first transmit power satisfies the following relationship:

[0044] P sense (i) = P CMAX -P comm (i)

[0045] Among them, P comm (i) represents the second transmission power, P CMAX Indicates the maximum transmit power of the terminal, P sense (i) represents the first transmission power.

[0046] In one possible design, when the perception priority is higher than the communication priority, the first transmit power minus the second transmit power is greater than or equal to a first threshold. Alternatively, when the communication priority is higher than the perception priority, the second transmit power minus the first transmit power is greater than or equal to a second threshold.

[0047] Among them, the technical effects brought about by any possible design of the second aspect can refer to the technical effects brought about by the corresponding design in the above-mentioned first aspect, and will not be repeated here.

[0048] In a third aspect, a communication device is provided for implementing various methods. The communication device includes modules, units, or means corresponding to the methods, wherein the modules, units, or means can be implemented in hardware, software, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules or units corresponding to the functions.

[0049] In some possible designs, the communication device may include a processing module and a transceiver module. The processing module may be configured to implement the processing functionality of any of the above aspects and any possible implementations thereof. The transceiver module may include a receiving module and a transmitting module, respectively configured to implement the receiving functionality and the transmitting functionality of any of the above aspects and any possible implementations thereof.

[0050] In some possible designs, the transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0051] In a fourth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any one of the aspects.

[0052] In a fifth aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface is used to communicate with a module outside the communication device; the processor is used to execute a computer program or instruction so that the communication device executes the method described in any aspect.

[0053] In a sixth aspect, a communication device is provided, comprising: at least one processor; the processor is configured to execute a computer program or instruction stored in a memory, so that the communication device performs the method described in any one of the aspects. The memory may be coupled to the processor, or may be independent of the processor.

[0054] In a seventh aspect, a communication device is provided (for example, the communication device may be a chip or a chip system), which includes a processor for implementing the functions involved in either the first aspect or the second aspect.

[0055] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0056] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0057] In one possible design, the communication device described in the third aspect to the seventh aspect may be the first communication device in the first aspect or the second aspect, or a device included in the first communication device, such as a chip or a chip system.

[0058] In an eighth aspect, a communication device is provided, which may be a first communication device, or a module or unit (for example, a chip, or a chip system, or a circuit) in the first communication device that corresponds one-to-one to the method / operation / step / action described in the first aspect or the second aspect, or a module or unit that can be used in conjunction with the first communication device.

[0059] It can be understood that when the communication device provided in any one of the third to eighth aspects is a chip, the sending action / function of the communication device can be understood as output information, and the receiving action / function of the communication device can be understood as input information.

[0060] In the ninth aspect, a computer-readable storage medium is provided, which stores a computer program or instruction. When the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the first aspect or the second aspect.

[0061] In a tenth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the first aspect or the second aspect.

[0062] In an eleventh aspect, a communication system is provided, which may include a first communication device and a second communication device. The first communication device is configured to implement the method described in the first aspect and any one of its designs, or the first communication device is configured to implement the method described in the second aspect and any one of its designs. The first communication device is a terminal, and the second communication device is a RAN node; alternatively, the first communication device and the second communication device are both terminals.

[0063] Among them, the technical effects brought about by the third to eleventh aspects and any of their design methods can refer to the technical effects brought about by different design methods in the first or second aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1 is a schematic diagram of a V2X scenario provided by this application;

[0065] FIG2 is a schematic diagram of a scenario of a vehicle connectivity service provided by this application;

[0066] Figures 3 to 6 are schematic diagrams of the structure of the communication system provided by this application;

[0067] FIG7 is a schematic flow chart of a power control method provided by the present application;

[0068] FIG8 is a flow chart of another power control method provided by the present application;

[0069] FIG9 is a schematic structural diagram of a communication device provided by the present application;

[0070] FIG10 is a schematic structural diagram of another communication device provided by the present application;

[0071] FIG11 is a schematic structural diagram of another communication device provided in this application. DETAILED DESCRIPTION

[0072] In the description of this application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is merely a description of 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.

[0073] In the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0074] In addition, to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0075] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0076] It will be understood that the “embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It will be understood that in the various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0077] It can be understood that in this application, "when" and "if" both mean that corresponding processing will be taken under certain objective circumstances, and do not limit the time, nor do they require any judgment action when implementing, nor do they mean that there are other limitations.

[0078] It is understood that some optional features in the embodiments of the present application may, in certain scenarios, be implemented independently of other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects. They may also be combined with other features in certain scenarios as needed. Accordingly, the devices provided in the embodiments of the present application may also implement these features or functions accordingly, which will not be described in detail here.

[0079] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments of this application, unless otherwise specified and there is no logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. The following description of the embodiments of this application does not constitute a limitation on the scope of protection of this application.

[0080] In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief introduction to the relevant technologies of the present application is first given as follows.

[0081] 1. Cellular vehicle to everything (C-V2X):

[0082] C-V2X is a vehicle-to-everything (V2X) communication technology developed based on cellular systems. It leverages and enhances current cellular network features and elements to enable low-latency and highly reliable communications between various nodes in a vehicle network. For example, as shown in Figure 1, it enables vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, and vehicle-to-network (V2N) communication.

[0083] As cellular systems evolve from the fourth generation (4G) long term evolution (LTE) system to the fifth generation (5G) new radio (NR), C-V2X also evolves from LTE-V2X to NR-V2X.

[0084] NR V2X can support lower transmission latency, more reliable communication, higher throughput, and a better user experience, meeting the needs of a wider range of application scenarios. Furthermore, the vehicle-to-vehicle communication technology supported by V2X can be extended to device-to-device (D2D) communication in any system.

[0085] Future connected vehicle services may be implemented through the air interface (Uu interface). For example, services with high speed, latency, and reliability requirements, such as vehicle networking services and in-vehicle entertainment services, can be implemented through the Uu interface. Furthermore, vehicles in the same area may have consistent service requirements. Therefore, the base station can use multicast to simultaneously serve multiple vehicles, improving resource utilization efficiency. For example, as shown in Figure 2, the base station can provide services to multiple vehicle groups, sending the same service data within the same group.

[0086] Typically, vehicles are able to obtain sensory information. Currently, the sensory information on the vehicle side mainly comes from external on-board radars, whose frequencies are mainly divided into the 24 gigahertz (GHz) band and the 77 GHZ band. Strictly speaking, the 77 GHz radar belongs to the millimeter wave radar, but in fact, the 24 GHz radar is also called the millimeter wave radar. Among them, the 77 GHz millimeter wave radar is mainly deployed in front of the vehicle for the detection of medium and long-range objects, and the 24 GHz millimeter wave radar is generally deployed on the side and rear of the vehicle for blind spot detection, assisted parking systems, etc.

[0087] Millimeter-wave radar is a radar sensor that uses millimeter-wave electromagnetic waves to measure distance, relative distance, and direction. It transmits millimeter-wave electromagnetic waves forward. If there are vehicles or objects ahead, the radar receives the reflected echo. By analyzing the detected echo frequency changes, it can detect the presence of vehicles or objects ahead, as well as the distance, relative speed, and direction to the object.

[0088] For example, the millimeter-wave radar measurement principle is to transmit electromagnetic waves in the millimeter wave band and receive the reflected echo. The target's position and relative distance are measured based on the time difference between transmission and reception. Based on the propagation speed of electromagnetic waves, the target's distance s can be expressed as s = ct / 2. Here, represents the time difference between the radar transmitting the electromagnetic wave and receiving the echo, that is, the time from when the radar transmits the electromagnetic wave to when it receives the echo, and c represents the speed of light.

[0089] 2. Fusion of perception and communication:

[0090] Future business needs and technology development trends have given rise to the integration of perception and communication. For example, perception, also known as wireless perception, refers to the emission of electromagnetic energy into space, and by receiving radio waves reflected by objects in space, the information of the object can be calculated. For example, parameters such as position, direction, height, speed, size, movement path, etc., and the internal and external shape and structure of the object can be detected. By exploring the transmission, echo, reflection and scattering of radio waves, we can perceive and better understand the physical world. As one of the electromagnetic wave sensing technologies, wireless sensing technology can be used as an important alternative technology in security inspection, hidden object detection, environmental reconstruction, etc. due to its penetrability and security.

[0091] With the convergence of perception and communication, future base stations and terminals will increasingly possess both communication and perception capabilities. For example, future base stations will be able to monitor the status of targets within their coverage area (such as low-flying objects, traffic, and crowds of people in hotspots), detecting, locating, and identifying them. Furthermore, they will be able to measure the natural environment and weather conditions in real time within the coverage area.

[0092] In the future, terminals will be upgraded to intelligent entities, and the capabilities of unmanned vehicles, drones, robots, and other intelligent devices will continue to increase. Intelligent entities may need to recognize human posture, movement, and expression to enhance human-computer interaction. They will also need to identify the motion states of multiple intelligent entities to improve intelligent collaboration. Furthermore, intelligent entities may need to identify the internal properties of the human body, products, and objects to provide remote, unmanned medical, quality, and security inspection services based on artificial intelligence (AI). These services will further drive the integration of intelligent entity perception and communication, which will not only enhance the information exchange capabilities between intelligent entities and between intelligent entities and systems, but also potentially reduce the size, power consumption, and cost of intelligent entity hardware devices, thereby promoting the ubiquity of new services.

[0093] In the future, the sixth-generation (6G) wireless network will integrate and coexist with communication capabilities, evolving into the technical direction of "communication and perception integration." This will give 6G networks the ability to perceive the physical world at all times and everywhere. This will fully meet the needs of multi-dimensional sensory integration and effectively support the wide-area expansion of communication capabilities, opening up application space beyond the connections of traditional mobile communication networks.

[0094] For example, integrated sensing and communication (ISAC) is a typical architecture for the fusion of sensing and communication. By sharing hardware and software resources within the same system, ISAC provides both high-quality communication and high-precision sensing capabilities, reducing costs and improving system performance. Communication functions can be understood as traditional data transmission, while sensing functions include ranging, speed measurement, angle measurement, imaging, and detection.

[0095] 3. Uplink power control:

[0096] When electromagnetic wave signals sent by the transmitter propagate through a wireless channel, they are affected by path loss and shadow fading, resulting in reduced signal strength upon reaching the receiver. Therefore, when the distance between the transmitter and receiver changes, the transmitter system appropriately adjusts the signal transmission power to compensate for the effects of path loss and shadow fading. It should be noted that in this application, transmission power can also be referred to as transmit power, and the two are interchangeable.

[0097] The transmit power of the physical uplink shared channel (PUSCH) on the terminal side satisfies the following relationship:

[0098] Among them, P PUSCH (i) represents the PUSCH transmit power on the i-th time unit. For example, the time unit in the present application can be an orthogonal frequency division multiplexing (OFDM) symbol, a time slot, a mini-time slot, or a subframe.

[0099] P CMAX Indicates the maximum transmit power of the terminal. Indicates the received power expected by the base station on a single resource block (RB).

[0100] μ represents the subcarrier configuration factor, which is used to indicate the subcarrier size. Indicates the number of RBs occupied by PUSCH in the i-th time unit. TF Indicates the power offset value determined by the modulation and coding scheme (MCS). min{} indicates the minimum value operation.

[0101] α represents the path loss compensation factor. PL represents the path loss estimate, for example, PL = reference signal transmit power - measured reference signal received power (RSRP). The reference signal can be sent by the base station to the terminal for reception; alternatively, it can be sent by the terminal to the base station for reception. In this case, the base station needs to send the measured RSRP to the terminal.

[0102] f represents a closed-loop power control parameter, which can be understood as the adjustment amount of the PUSCH transmit power. f can be determined based on the transmit power control (TPC) sent by the base station.

[0103] Exemplarily, the base station may determine the TPC of the terminal based on power control configuration parameters, information fed back by the terminal, and base station measurement information, and send the TPC via downlink control information (DCI) in a physical downlink control channel (PDCCH).

[0104] PUSCH power control can be understood as the process by which the base station adjusts the PUSCH transmission power by adjusting TPC. For example, when the terminal initially accesses or switches to the target cell, it uses open-loop power control. The initial transmit power is determined based on the power parameters and path loss configured by the base station.

[0105] During the service, the terminal adopts a combination of open-loop power control and closed-loop power control. That is, the terminal determines the transmit power based on the power parameters and path loss configured by the base station, and also adaptively adjusts the PUSCH transmit power according to the TPC indicated by the base station to adapt to changes in the PUSCH channel environment and service load.

[0106] 4. Sidelink (SL) power control:

[0107] In sidelink power control, both downlink path loss and sidelink path loss are considered. For example, the transmit power of the physical sidelink shared channel (PSSCH) satisfies the following relationship:

[0108] P PSSCH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i)))dBm (2)

[0109] Where, represents the PSSCH transmission power on the i-th time unit. CMAX Indicates the maximum transmit power of the terminal. MAX,CBR Indicates the power determined based on data priority and channel busy ratio (CBR). PSSCH,D (i) and P PSSCH,SL (i) represents the power determined based on the downlink path loss and the side path loss, respectively, and satisfies the following relationship:

[0110] Among them, P O,D Indicates the received power level expected by the base station on a single RB. μ represents the subcarrier configuration factor. Indicates the number of RBs occupied by PSSCH in the i-th time unit. D Indicates the downlink path loss compensation factor. PL D Represents the downlink path loss estimate, for example, PL D =reference signal transmission power-measured RSRP. The reference signal can be sent by the base station to the terminal, or by the terminal to the base station.

[0111] Where, represents the received power level expected by the transmitter on a single RB. represents the side path loss compensation factor. represents the side path loss estimate, for example, PL SL =reference signal transmission power - measured RSRP. The reference signal may be sent by the terminal to other terminals, or may be sent by other terminals to the terminal.

[0112] In addition, on the sidelink, the PSSCH may be transmitted in the same time unit as the physical sidelink control channel (PSCCH). In this scenario, the transmit power of the PSSCH and PSCCH respectively satisfies the following relationship:

[0113] in, Indicates the number of RBs occupied by PSCCH in the i-th time unit. PSSCH The implementation of (i) is shown in the above relationship (2) and will not be repeated here.

[0114] 5. SL congestion control:

[0115] In a distributed system, there's no central node (such as a base station). The number of terminals and the resources used by each terminal cannot be uniformly controlled. Therefore, congestion control is necessary to ensure system performance. In the SL congestion control mechanism, terminals measure the CBR and channel occupancy ratio (CR), adjusting the CR based on the CBR threshold to constrain terminal resource utilization and avoid system congestion.

[0116] CR is the ratio of the sum of the number of subchannels transmitted and to be transmitted by a terminal within the CR window to the total number of subchannels within the CR window, indicating the channel occupancy of the transmitting terminal within the CR window. For example, taking the CR window as time slot [na,n+b], CR is the ratio of the sum of the number of subchannels transmitted by the terminal within the window [na,n-1] and the number of subchannels to be transmitted within the window [n,n+b] to the total number of subchannels within the CR window [na,n+b]. n, a, and b are positive integers.

[0117] CBR indicates the busyness of a channel over a period of time. Its value can be the ratio of the number of subchannels whose received signal strength indication (RSSI) measured in the window [na,n-1] is greater than the RSSI threshold to the total number of measured subchannels.

[0118] Specifically, in the SL congestion control mechanism, if the following constraints are met, the terminal can perform SL transmission; if not, the terminal cannot perform SL transmission.

[0119] Where CR(i) represents the CR of the PSSCH transmission with priority i in time slot nN, and N represents the congestion control processing time. represents the CR constraint, which is related to the priority k and the CBR of time slot nN. Limit (k) Can be configured by higher layers.

[0120] As mentioned above, only the power control method for communication signals is currently defined. For terminals with both communication and perception functions, they may need to send perception signals and communication signals simultaneously. In this scenario, how to determine the transmit power of the perception signal is a problem that needs to be solved urgently. Based on this, the present application provides a power control method that can determine the transmit power of the perception signal, meet the maximum transmit power constraint of the terminal, and dynamically and flexibly adjust the transmit power of the communication signal and the perception signal to meet transmission requirements and improve transmission performance.

[0121] The technical solutions of the embodiments of the present application can be used in various communication systems, which may be third generation partnership project (3GPP) communication systems, for example, fourth generation (4G) systems such as long term evolution (LTE) systems, 5G systems such as new radio (NR) systems, systems with hybrid LTE and 5G networking, non-terrestrial networks (NTN), or other next generation communication systems such as 6G communication systems. The communication system may also be a non-3GPP communication system without limitation.

[0122] The technical solutions of the embodiments of the present application can be used in various scenarios, such as scenarios where terminals communicate with the network, or scenarios where terminals directly communicate with each other, such as device-to-device (D2D), machine-to-machine (M2M), and V2X.

[0123] Among them, the above-mentioned communication systems and scenarios applicable to this application are only examples, and the communication systems and scenarios applicable to this application are not limited to these. The communication systems and scenarios provided in this application do not impose any limitations on the solutions of this application. They are uniformly explained here and will not be repeated below.

[0124] A possible, non-limiting system applicable to the present application may include a first communication device and a second communication device. The first communication device and the second communication device may communicate wirelessly.

[0125] As a possible implementation, as shown in Figure 3, the first communication device 310 can be a terminal or a module in the terminal (such as a chip, a chip system, or a processor), and the second communication device 320 can be a radio access network (RAN) node or a module in the RAN node (such as a chip, a chip system, or a processor). In this case, the first communication device and the second communication device can transmit communication signals through the uplink or downlink, Uu port.

[0126] As another possible implementation, the first communication device and the second communication device may both be terminals, or both be modules in a terminal (such as a chip, a chip system, or a processor). In this case, the first communication device and the second communication device may transmit communication signals via a side link or a PC5 interface.

[0127] Exemplarily, the first communication device and the second communication device can be two terminals in any direct communication scenario between terminals, including but not limited to D2D, M2M, V2X, Internet of Things (IoT), relay and cooperation between terminals, etc.

[0128] For example, as shown in FIG4 , both the first communication device and the second communication device may be within the coverage of a RAN node. Alternatively, as shown in FIG5 , one of the first communication device and the second communication device may be within the coverage of a RAN node, while the other may be outside the coverage of the RAN node. Alternatively, as shown in FIG6 , both the first communication device and the second communication device may be outside the coverage of a RAN node.

[0129] A RAN node may be a device deployed in the RAN of a 3GPP-related cellular system. For example, the RAN may be a 4G or 5G mobile communication system, or a future-oriented evolutionary system (e.g., a 6G mobile communication system). Alternatively, the RAN may be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. Alternatively, the RAN may be a communication system that integrates two or more of the above systems.

[0130] RAN nodes, sometimes also referred to as access network equipment, RAN entities, or access nodes, form part of a communication system and facilitate wireless access for terminals. RAN nodes and terminals are sometimes referred to as communication devices. For example, network element 310 in Figure 3 can be understood as a communication device with base station functionality, and network element 320 can be understood as a communication device with terminal functionality.

[0131] In one possible scenario, the RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The RAN node may 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 CRAN scenario. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the V2X technology may be a road side unit (RSU). All or part of the functions of the RAN node in this application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The RAN node in this application may also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node.

[0132] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0133] 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 O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0134] A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. A terminal may be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, drone, helicopter, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of the present application do not limit the device form of the terminal.

[0135] It should be noted that the communication system described in the embodiment of the present application is intended to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0136] The following describes the power control method provided in the embodiments of the present application, using the communication systems shown in Figures 3 to 6 as examples, and taking the interaction between a terminal and a RAN node, or between terminals, as an example. It should be noted that in the following embodiments of the present application, the names of messages, parameters, or information between terminals and RAN nodes, or between terminals, are merely examples. Other names may also be used in other embodiments, and the methods provided in the present application are not specifically limited to these.

[0137] It is understood that in the embodiments of the present application, the terminal or RAN node may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0138] It is understandable that this application uses a RAN node and a terminal, or a terminal and a terminal, as examples to illustrate the execution entities of the interaction diagram, but this application does not limit the execution entities of the interaction diagram. For example, the method executed by the RAN node in this application can also be executed by a module (such as a chip, a chip system, or a processor) applied to the RAN node, and can also be implemented by a logical node, logical module, or software that can implement all or part of the RAN node functions; the method executed by the terminal in this application can also be executed by a module (such as a chip, a chip system, or a processor) applied to the terminal, and can also be implemented by a logical node, logical module, or software that can implement all or part of the terminal functions.

[0139] 7 is a flow chart of a power control method provided in an embodiment of the present application. The power control method may include the following steps:

[0140] S701. A first communication device determines a first transmission power and a second transmission power.

[0141] The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. The first transmit power can be understood as the transmit power of the perception signal, and the second transmit power can be understood as the transmit power of the communication signal. It is understood that the first communication device is a terminal or a module within the terminal, such as a chip, a chip system, or a processor. The maximum transmit power of the terminal is the maximum transmit power of the first communication device.

[0142] The first transmit power is the product of the first power control factor and the third transmit power. The second transmit power is the product of the second power factor and the fourth transmit power. Exemplarily, the first power control factor is used to adjust the transmit power of the perception signal; the second power control factor is used to adjust the transmit power of the communication signal. The first power control factor can have a value range of [0, 1], and the second power control factor can also have a value range of [0, 1]. The initial values ​​of the first power control factor and the second power control factor can be 1 or other values, which are not specifically limited in this application.

[0143] It should be noted that the power control factor in this application may also be called a power adjustment factor. Of course, it may also have other names. This application does not specifically limit the name of the power control factor.

[0144] Exemplarily, the perception signal can be understood as a signal used for perception, and the perception signal can also have other names without limitation. The perception signal can be an OFDM signal obtained by modulating a specific sequence on a subcarrier. The specific sequence can be a ZC sequence, a Gold sequence, etc., or the specific sequence can also be a random data symbol, for example, a random data symbol modulated by quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), etc., and this application does not make specific limitations on this.

[0145] For example, the first communications device may first determine the third transmit power and the first power control factor, and then determine the product of the first power control factor and the third transmit power as the first transmit power. Furthermore, the first communications device may first determine the fourth transmit power and the second power control factor, and then determine the product of the second power control factor and the fourth transmit power as the second transmit power. That is, the first transmit power may be understood as the final transmit power of the perception signal, or the adjusted transmit power of the perception signal, and the third transmit power may be understood as the initial transmit power of the perception signal. The second transmit power may be understood as the final transmit power of the communication signal, or the adjusted transmit power of the communication signal, and the fourth transmit power may be understood as the initial transmit power of the communication signal.

[0146] This embodiment does not specifically limit the order of determining the third transmit power and the fourth transmit power. The first communication device may first determine the third transmit power and then determine the fourth transmit power; or first determine the fourth transmit power and then determine the third transmit power; or determine the third transmit power and the fourth transmit power at the same time.

[0147] The third transmit power is determined based on the maximum transmit power of the terminal and the fifth transmit power. The specific method for determining the third transmit power will be described in subsequent implementations and will not be elaborated here.

[0148] As one possible implementation, the fifth transmit power is determined based on the first path loss. Exemplarily, the first path loss may be perceived path loss, or perceived signal path loss, or perceived link path loss. That is, the fifth transmit power can be understood as a transmit power that takes the perceived path loss into account. The specific method for determining the fifth transmit power will be described in subsequent embodiments and is not detailed here.

[0149] As another possible implementation, the fifth transmit power is the expected transmit power of the perception signal, or in other words, the fifth transmit power is the expected transmit power of the perception signal (by the perception signal transmitter or the perception signal receiver), or in other words, the fifth transmit power is the transmit power requirement of the perception signal. In this possible implementation, the fifth transmit power may be configured by a higher layer.

[0150] The fourth transmit power is determined according to the maximum transmit power of the terminal and the second path loss. Exemplarily, the second path loss may be a communication path loss.

[0151] S702: The first communication device sends a perception signal in a first time unit according to a first transmission power.

[0152] The first time unit can be understood as a time unit in which the perception signal is located, or a time unit used to carry the perception signal. The first time unit can be scheduled by the RAN node for the first communication device, or can be determined by the first communication device itself. For example, in an SL system, the first communication device selects the first time unit from a resource pool or determines the first time unit based on an SL congestion control mechanism. The time unit can be, for example, an OFDM symbol, a time slot, a mini-time slot, or a subframe, etc., without limitation.

[0153] In other words, the first communication device acts as the transmitter of the perception signal. The receiver of the echo signal corresponding to the perception signal can be the first communication device itself, or a third communication device. The third communication device can be, for example, the second communication device or a communication device other than the second communication device, and this application does not specifically limit this. For example, the echo signal can be understood as a signal formed after the perception signal is reflected by an object.

[0154] Exemplarily, after the receiving end of the echo signal receives the echo signal, it can perform perception processing based on the echo signal, such as sampling the echo signal to obtain a receiving sequence, and performing correlation processing on the receiving sequence and the local sequence (the sequence used to generate the perception signal) to obtain perception information, such as the position, speed, distance, etc. of the perceived target.

[0155] S703: The first communication device transmits a communication signal at the first time unit according to the second transmission power. Correspondingly, the second communication device receives the communication signal at the first time unit. That is, the first communication device also serves as the transmitter of the communication signal, and the second communication device serves as the receiver of the communication signal.

[0156] When the first communication device is a terminal and the second communication device is a RAN node, the communication signal is an uplink reference signal and / or a signal carried on an uplink channel. The uplink channel may be, for example, a physical random access channel (PRACH), a physical uplink control channel (PUCCH), or a PUSCH. The uplink reference signal may include, but is not limited to, a sounding reference signal (SRS).

[0157] In the case where both the first communication device and the second communication device are terminals, the communication signal is a signal carried on the PSSCH.

[0158] It can be understood that, since both the perception signal and the communication signal are sent by the first communication device in the first time unit, it can be considered that the first communication device sends the perception signal and the communication signal at the same time.

[0159] Based on this solution, the first communication device can determine the transmit power of the perception signal and transmit the perception signal. Furthermore, the first communication device uses the product of the first power control factor and the third transmit power as the transmit power of the perception signal (i.e., the first transmit power), and uses the product of the second power control factor and the fourth transmit power as the transmit power of the communication signal (i.e., the second transmit power). This allows the transmit power of the perception signal and the communication signal to be dynamically and flexibly adjusted using the first power control factor and the second power control factor, so that the sum of the first transmit power and the second transmit power satisfies the maximum transmit power constraint of the terminal. This enables the simultaneous transmission of the perception signal and the communication signal, satisfying the requirements for simultaneous perception and communication.

[0160] The above describes the overall process of the power control method provided by this application. The following describes in detail the method for determining the third transmit power in the above solution. Exemplarily, the third transmit power can be determined in the following two ways:

[0161] Mode 1: The third transmit power is determined based on the maximum transmit power of the terminal and the fifth transmit power. The third transmit power satisfies the following relationship:

[0162] P sense (i) = min(P CMAX ,P sense,PL (i)) (8)

[0163] Among them, P sense (i) represents the third transmission power. i represents the index of the first time unit. P CMAX Indicates the maximum transmit power of the terminal. sense,PL (i) represents the fifth transmission power. min() represents a minimum value operation.

[0164] In a possible implementation, when the first communication device is a terminal and the second communication device is a RAN node, or when the first communication device belongs to an uplink communication perception integrated system, the first communication device determines the third transmission power using this method.

[0165] In one possible implementation, when the fifth transmit power is determined based on the first path loss, the fifth transmit power can be determined based on the first path loss and at least one of the following: a first expected received power on a single RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, a first subcarrier configuration factor, or a first closed-loop power control parameter.

[0166] As a possible implementation, the first path loss can be expressed as: the transmit power of the reference signal / sequence minus the measured receive power of the reference signal / sequence. The transmitter of the reference signal / sequence can be the first communications device, and the receiver can be the third communications device. In this case, the third communications device also feeds back the receive power of the reference signal / sequence to the first communications device. Alternatively, the transmitter of the reference signal / sequence can be the third communications device, and the receiver can be the first communications device. Alternatively, both the transmitter and receiver of the reference signal / sequence can be the first communications device. In this case, the reference signal serves as a perception signal, and the reference sequence is a sequence used to generate the perception signal. The reference signal received by the first communications device can be understood as an echo signal of the reference signal it sent.

[0167] As a possible implementation, the first expected received power on a single RB may be a received power level on a single RB expected by the RAN node. Exemplarily, the RAN node (i.e., the second communication device) may indicate the first expected received power to the terminal (i.e., the first communication device).

[0168] As a possible implementation, the number of RBs occupied by the perception signal is the number of RBs occupied by the perception signal in the first time unit. The first subcarrier configuration factor is used to indicate the subcarrier size corresponding to the perception signal.

[0169] As a possible implementation, the first closed-loop power control parameter may be indicated by the RAN node to the terminal. For example, the terminal may first report the power headroom to the RAN node, and the RAN node may determine the first closed-loop power control parameter based on the power headroom and indicate the first closed-loop power control parameter to the terminal.

[0170] Exemplarily, the fifth transmit power may satisfy the following relationship:

[0171] Among them, P sense,PL (i) represents the fifth transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on a single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the sensing signal in time unit i (i.e., the first time unit), α sense Indicates the first path loss compensation factor, PL senserepresents the first path loss or the estimated value of the first path loss, f sense Indicates the first closed-loop power control parameter.

[0172] In one possible implementation, in this approach, the fourth transmit power is determined based on the maximum transmit power of the terminal, the second path loss, and at least one of the following: a second expected receive power on a single RB, a second path loss compensation factor, the number of RBs occupied by the communication signal, a second subcarrier configuration factor, a second closed-loop power control parameter, or a power offset value. The power offset value is determined by the MCS of the communication signal.

[0173] When the first communication device is a terminal and the second communication device is a RAN node, the second path loss may be an uplink or downlink path loss, or in other words, a path loss between the terminal and the RAN node. For example, the second path loss may be the PL in the above relationship (1), and the fourth transmit power may be determined based on the above relationship (1).

[0174] The second expected received power on a single RB, the second path loss compensation factor, the number of RBs occupied by the communication signal, the second subcarrier configuration factor, the second closed-loop power control parameter, and the power offset value can be respectively the values ​​in the above relationship (1) α、 μ, f, Δ TF Please refer to the above related instructions and will not go into details here.

[0175] Mode 2: The third transmit power is determined based on the maximum transmit power of the terminal, the fifth transmit power, and the sixth transmit power. The third transmit power satisfies the following relationship:

[0176] P sense (i) = min(P CMAX ,P sense,C ,P sense,PL (i)) (10)

[0177] Among them, P sense (i) represents the third transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the fifth transmission power, P sense,C represents the sixth transmission power, and min() represents the minimum value operation.

[0178] In a possible implementation, when the first communication device and the second communication device are both terminals, or when the first communication device belongs to a sidewalk / D2D communication perception integrated system, the first communication device determines the third transmission power using the second method.

[0179] In one possible implementation, when the fifth transmit power is determined based on the first path loss, the fifth transmit power can be determined based on the first path loss and at least one of the following: a first expected received power on a single RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, or a first subcarrier configuration factor.

[0180] The first expected received power on a single RB may be a received power level on a single RB expected by the first communication device or the second communication device. The first path loss, the first path loss compensation factor, the number of RBs for the sensing signal, and the first subcarrier configuration factor can be referred to the relevant description in the above-mentioned method 1 and are not repeated here.

[0181] Exemplarily, the fifth transmit power may satisfy the following relationship:

[0182] Among them, P sense,PL (i) represents the fifth transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on a single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the sensing signal in time unit i (i.e., the first time unit), α sense Indicates the first path loss compensation factor, PL sense Indicates the first path loss or the estimated value of the first path loss.

[0183] In one possible implementation, the sixth transmit power is determined based on at least one of a CBR, a CR, or a perceived priority. For example, the CR may refer to the CR corresponding to the time unit [ia, i+b], i.e., the CR window is the time unit [ia, i+b], where i represents the index of the first time unit. The CBR may refer to the CBR corresponding to the time unit [ia, i-1]. Where a and b are positive integers. The calculation method of the CR and CBR can refer to the relevant description in the aforementioned SL congestion control mechanism and will not be repeated here.

[0184] As a possible implementation, the CBR and / or CR is inversely proportional to the sixth transmit power. For example, the larger the CBR and / or CR, the smaller the sixth transmit power, or the smaller the CBR and / or CR, the larger the sixth transmit power. The perceived priority is directly proportional to the sixth transmit power. For example, the higher the perceived priority, the larger the sixth transmit power, or the lower the perceived priority, the smaller the sixth transmit power.

[0185] For example, a larger CBR and / or CR indicates a busier channel, and in this case, a smaller sixth transmit power indicates that, when the channel is busy, the candidate transmit power determined based on the CBR and / or CR is smaller. When the candidate transmit power is smaller, interference from the perception signal sent by the first communication device to other signals in the channel can be reduced.

[0186] In addition, a higher perception priority indicates a more important perception service. In this case, a higher sixth transmit power indicates a more important perception service. Consequently, a higher candidate transmit power is determined based on the perception priority. When the candidate transmit power is higher, the performance of the perception service, i.e., the performance of the high-priority service, can be guaranteed.

[0187] As an example, the sixth transmit power is equal to the product of the third power control factor and the fifth transmit power. The third power control factor has a value range of [0, 1]. The third power control factor is determined based on at least one of the CBR, CR, or perceived priority. In addition, the CBR and / or CR are inversely proportional to the third power control factor, and the perceived priority is directly proportional to the third power control factor.

[0188] For example, the correspondence between CBR, CR, or perceived priority and the third power control factor may be shown in at least one row of Tables 1 to 7 below. A larger priority number indicates a lower priority. Alternatively, the correspondence may be a combination of correspondences shown in different tables.

[0189] Table 1

[0190] Table 2

[0191] Table 3

[0192] Table 4

[0193] Table 5

[0194] Table 6

[0195] Table 7

[0196] In one possible implementation, under mode 2, the fourth transmit power is determined based on the maximum transmit power of the terminal, the second path loss, and at least one of the following: the second expected receive power on a single RB, the second path loss compensation factor, the number of RBs occupied by the communication signal, and the second subcarrier configuration factor.

[0197] In the case where both the first communication device and the second communication device are terminals, the second path loss may include the path loss of the sidelink and the path loss of the downlink, or in other words, the path loss between the first communication device and the second communication device (i.e., between terminals) and the path loss between the first communication device and the RAN node. For example, the second path loss may include PL in the above relationship (3). D and PL in the above relation (4) SL , the fourth transmission power can be determined based on the above relationship (2), relationship (3) and relationship (4). Alternatively, the fourth transmission power can be determined based on the above relationship (2), relationship (3), relationship (4) and relationship (5).

[0198] The second expected received power on a single RB may include P in the above relationship (3): O,D and P in the above relation (4) O,SL The second path loss compensation factor may include α in the above relationship (3) D and α in the above relation (4) SL The number of RBs occupied by the communication signal can be the number in the above relations (3) and (4). The second subcarrier configuration factor may be μ in the above relationship (3) and relationship (4). Please refer to the above related descriptions and will not be repeated here.

[0199] In one possible implementation, the first communication device determines the first transmit power and the second transmit power, which may include: the first communication device determines a third transmit power and a fourth transmit power. When the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal, the first communication device adjusts the first power control factor or the second power control factor so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. That is, adjust β sense or β comm , such that:

[0200] β sense ·P sense (i)+β comm ·P comm (i)≤P CMAX (12).

[0201] Among them, β sense represents the first power control factor, β comm Represents the second power control factor, P sense (i) represents the third transmission power, P comm (i) represents the fourth transmission power, P CMAX Indicates the maximum transmit power of the terminal. For the convenience of description, the first transmit power is denoted as P sense_T (i), i.e., β sense·P sense (i) = P sense_T (i); The second transmission power is recorded as P comm_T (i), i.e., β comm ·P comm (i) = P comm_T (i).

[0202] As a possible implementation, when the perception priority is higher than the communication priority, the first power control factor may not exist, or the value of the first power control factor may be 1. In this case, the above relationship (12) can be transformed into: P sense (i)+β comm ·P comm (i)≤P CMAX When the communication priority is higher than the perception priority, the second power control factor may not exist, or the value of the second power control factor may be 1. In this case, the above relationship (12) can be transformed into: β sense ·P sense (i)+P comm (i)≤P CMAX .

[0203] As a possible implementation, β sense ∈{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1}, and / or, β comm ∈{0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1}.

[0204] As a first possible implementation, when the communication priority is higher than the perception priority, the first communication device adjusts the first power control factor. In the embodiment of the present application, the communication priority may also be referred to as the data priority, and the two may be interchangeable.

[0205] As an example, when the communication priority is higher than the perception priority, the second power control factor β comm =1, the second transmission power is equal to the fourth transmission power, that is, P comm_T (i) = P comm (i). At this time, the relationship (12) is transformed into: β sense ·P sense (i)+P comm (i)≤P CMAX The first transmission power is the maximum transmission power of the terminal minus the second transmission power, that is, P sense_T (i) = P CMAX -β comm ·P comm (i) The first power control adjustment factor is the ratio of the first transmit power to the third transmit power, that is, βsense =P sense_T (i) / P sense (i).

[0206] As another example, when the communication priority is higher than the perception priority, the second power control factor β comm <1. At this time, the first communication device can select the first power control factor. If the first power control factor selected this time makes β sense ·P sense (i)+β comm ·P comm (i)>P CMAX , the first communication device reduces the value of the first power control factor until β sense ·P sense (i)+β comm ·P comm (i)≤P CMAX .

[0207] Optionally, if the protocol predefines or the RAN node preconfigures the minimum transmission power P of the sensing signal sense_th , when the communication priority is higher than the perception priority, if the first transmission power determined by the above adjustment method is less than the minimum transmission power of the perception signal, that is, P sense_T (i) <P sense_th , then the first transmission power is adjusted to the minimum transmission power P of the perception signal sense_th At this time, the second transmission power is adjusted to β comm ·P comm (i)-(P sense_th -P sense_T (i)).

[0208] Optionally, when the communication priority is higher than the perception priority, if the difference between the fourth transmit power and the third transmit power is greater than or equal to the threshold value P th_a , then the second transmission power is equal to the fourth transmission power, that is, P comm_T (i) = P comm (i) The second power control factor β comm =1. At this time, the first transmission power P sense_T (i) = P CMAX -β comm ·P comm (i)-P th_a , where β comm =1. Then β sense =P sense_T (i) / P sense (i).

[0209] In addition, if the fourth transmission power is equal to the threshold P th_aThe sum is greater than or equal to the maximum transmit power of the terminal, that is, P comm (i)+P th_a ≥P CMAX , then P sense_T (i)=0, that is, the perception signal may not be sent.

[0210] As a second possible implementation, when the perception priority is higher than the communication priority, the first communication device adjusts the second power control factor.

[0211] As an example, when the perception priority is higher than the communication priority, the first power control factor β sense =1, the first transmission power is equal to the third transmission power, that is, P sense_T =P sense (i). At this time, the above relationship (12) is transformed into: P sense (i)+β comm ·P comm (i)≤P CMAX The second transmission power is the maximum transmission power of the terminal minus the first transmission power, that is, P comm_T (i) = P CMAX -β sense ·P sense (i) The second power control adjustment factor is the ratio of the second transmit power to the fourth transmit power, that is, β comm =P comm_T (i) / P comm (i).

[0212] As another example, when the perception priority is higher than the communication priority, the first power control factor β sense <1. At this time, the first communication device can select a second power control factor. If the second power control factor selected this time makes β sense ·P sense (i)+β comm ·P comm (i)>P CMAX , the first communication device reduces the value of the second power control factor until β sense ·P sense (i)+β comm ·P comm (i)≤P CMAX .

[0213] Optionally, if the protocol predefines or the RAN node preconfigures the minimum transmission power P of the communication signal comm_th , in the case where the perception priority is higher than the communication priority, if the second transmission power determined by the above adjustment method is less than the minimum transmission power of the communication signal, that is, P comm_T (i) <P comm_th, then the second transmission power is adjusted to the minimum transmission power P of the communication signal comm_th At this time, the first transmission power is adjusted to β sense ·P sense (i)-(P comm_th -P comm_T (i)).

[0214] Optionally, in the case where the perception priority is higher than the communication priority, if the difference between the third transmit power and the fourth transmit power is greater than or equal to the threshold value P th_b , then the first transmission power is equal to the third transmission power, that is, P sense_T =P sense (i), the first power control factor β sense =1. At this time, the second transmission power P comm_T (i) = P CMAX -β sense ·P sense (i)-P th_b , where β sense =1. Then β comm =P comm_T (i) / P comm (i).

[0215] In addition, if the third transmission power is equal to the threshold P th_b The sum is greater than or equal to the maximum transmit power of the terminal, that is, P sense (i)+P th_b ≥P CMAX , then P comm_T (i)=0, that is, no communication signal may be sent.

[0216] In one possible implementation, the first communications device determining the first transmit power and the second transmit power may include: the first communications device determining a third transmit power and a fourth transmit power. When the sum of the third transmit power and the fourth transmit power is less than or equal to the maximum transmit power of the terminal, the first power control factor and the second power control factor may both be 1, that is, the first transmit power is equal to the third transmit power, and the second transmit power is equal to the fourth transmit power.

[0217] Furthermore, if the third transmit power, the fourth transmit power, and the threshold P th_A The sum is less than or equal to the maximum transmit power of the terminal, that is, P sense (i)+P comm (i)+P th_A ≤P CMAX , then the first transmission power is equal to the third transmission power, and the second transmission power is equal to the fourth transmission power. That is, P sense_T =P sense (i), P comm_T (i) = Pcomm (i).

[0218] Or, if P sense (i)+P comm (i)≤P CMAX , but P sense (i)+P comm (i)+P th_A >P CMAX , and the communication priority is higher than the perception priority, then the second transmission power is equal to the fourth transmission power, and the first transmission power is P CMAX -P comm (i)-P th_A At this time, it can also be considered that the second power control factor is equal to 1, and the first power control factor is equal to the ratio of the first transmission power to the third transmission power.

[0219] Or, if P sense (i)+P comm (i)≤P CMAX , but P sense (i)+P comm (i)+P th_A >P CMAX , and the perception priority is higher than the communication priority, then the first transmission power is equal to the third transmission power, and the second transmission power is P CMAX -P sense (i)-P th_A At this time, it can also be considered that the first power control factor is equal to 1, and the second power control factor is equal to the ratio of the second transmit power to the fourth transmit power.

[0220] In one possible implementation, when the perception priority is higher than the communication priority, the first transmit power minus the second transmit power is greater than or equal to a first threshold. When the communication priority is higher than the perception priority, the second transmit power minus the first transmit power is greater than or equal to a second threshold. Exemplarily, the above-described method for determining the first and second transmit powers can be used to adjust the first and second transmit powers so that the first and second transmit powers satisfy this relationship.

[0221] The first threshold and the second threshold may be the same or different. The first threshold and the second threshold may be predefined by a protocol, or may be configured by a RAN node or a control node, which is not specifically limited in this application.

[0222] Based on this solution, the difference between the transmission power of high-priority high signals and the transmission power of low-priority signals can be ensured to be greater than or equal to the threshold, thereby reducing the interference of low-priority signals on high-priority signals and ensuring the transmission performance of high-priority signals.

[0223] In addition to the power control method shown in FIG7 , the present application also provides a power control method, as shown in FIG8 , which includes the following steps:

[0224] S801. A first communication device determines a first transmission power and a second transmission power.

[0225] The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. The first transmit power can be understood as the transmit power of the perception signal, and the second transmit power can be understood as the transmit power of the communication signal. It is understood that the first communication device is the terminal. The maximum transmit power of the terminal is the maximum transmit power of the first communication device.

[0226] As a possible implementation, when the perception priority is higher than the communication priority, the first transmit power is determined based on the terminal's maximum transmit power and the third transmit power. The second transmit power is the difference between the terminal's maximum transmit power and the first transmit power. Exemplarily, the first communications device may first determine the first transmit power based on the terminal's maximum transmit power and the third transmit power, and then determine the second transmit power as the difference between the terminal's maximum transmit power and the first transmit power.

[0227] The third transmit power is determined based on the first path loss. For example, the first path loss may be a sensed path loss or a sensed link path loss. A specific method for determining the third transmit power will be described in subsequent embodiments and will not be elaborated upon here.

[0228] Alternatively, the third transmit power is the expected transmit power of the perception signal, or in other words, the third transmit power is the expected transmit power of the perception signal (by the perception signal transmitter or the perception signal receiver), or in other words, the third transmit power is the transmit power requirement of the perception signal. In this case, the third transmit power may be configured by a higher layer.

[0229] As another possible implementation, when the communication priority is higher than the perception priority, the first transmit power is the difference between the terminal's maximum transmit power and the second transmit power. The second transmit power is determined based on the terminal's maximum transmit power and the second path loss, where the second path loss may be a communication path loss. Exemplarily, the first communication device may first determine the second transmit power based on the terminal's maximum transmit power and the second path loss, and then determine the difference between the terminal's maximum transmit power and the second transmit power as the first transmit power.

[0230] In one possible implementation, the implementation of the first transmit power, the second transmit power, and the third transmit power in the method shown in Figure 8 are similar to the implementation of the third transmit power, the fourth transmit power, and the fifth transmit power in the method shown in Figure 7, and reference may be made to the relevant descriptions of the third transmit power, the fourth transmit power, and the fifth transmit power in the method shown in Figure 7.

[0231] S802: The first communication device sends a perception signal in a first time unit according to a first transmission power.

[0232] S803: The first communication device transmits a communication signal at the first time unit according to the second transmission power. Correspondingly, the second communication device receives the communication signal at the first time unit. That is, the first communication device also serves as the transmitter of the communication signal, and the second communication device serves as the receiver of the communication signal.

[0233] The implementation of steps S802 and S803 may refer to the relevant descriptions of steps S702 and S703 above, and will not be repeated here.

[0234] Based on this solution, the first communication device can determine the transmit power of the perception signal and transmit the perception signal. Furthermore, the first communication device prioritizes the transmit power of high-priority signals based on priority, and uses the remaining power as the transmit power of low-priority signals. This ensures that the sum of the first and second transmit powers meets the maximum transmit power constraint of the terminal, thereby enabling the simultaneous transmission of the perception signal and the communication signal, meeting the requirements of simultaneous perception and communication.

[0235] The above describes the overall process of the power control method provided by this application. The following describes in detail the method for determining the first transmit power when the perception priority is higher than the communication priority. Exemplarily, the first transmit power can be determined in the following two ways:

[0236] Mode A: The first transmit power is determined based on the maximum transmit power of the terminal and the third transmit power. The first transmit power satisfies the following relationship:

[0237] P sense (i) = min(P CMAX ,P sense,PL (i)) (13)

[0238] Among them, P sense (i) represents the first transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the third transmission power, and min() represents a minimum value operation.

[0239] In a possible implementation, when the first communication device is a terminal and the second communication device is a RAN node, or when the first communication device belongs to an uplink communication perception integrated system, the first communication device adopts method A to determine the first transmission power.

[0240] In one possible embodiment, when the third transmit power is determined based on the first path loss, the third transmit power can be determined based on the first path loss and at least one of the following: a first expected received power on a single RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, a first subcarrier configuration factor, or a first closed-loop power control parameter.

[0241] Exemplarily, the third transmit power may satisfy the following relationship:

[0242] Among them, P sense,PL (i) represents the third transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on a single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the sensing signal in time unit i (i.e., the first time unit), α sense Indicates the first path loss compensation factor, PL sense represents the first path loss or the estimated value of the first path loss, f sense Indicates the first closed-loop power control parameter.

[0243] The specific implementation of the third transmission power may refer to the relevant description of the fifth transmission power in the first method shown in FIG. 7 , and will not be repeated here.

[0244] Mode B: The first transmit power is determined based on the maximum transmit power, the third transmit power, and the fourth transmit power of the terminal. The first transmit power satisfies the following relationship:

[0245] P sense (i) = min(P CMAX ,P sense,C ,P sense,PL (i)) (15)

[0246] Among them, P sense (i) represents the first transmission power, i represents the index of the first time unit, P CMAX Indicates the maximum transmit power of the terminal, P sense,PL (i) represents the third transmission power, P sense,C represents the fourth transmission power, and min() represents the minimum value operation.

[0247] In a possible implementation, when the first communication device and the second communication device are both terminals, or when the first communication device belongs to an integrated sidewalk / D2D communication perception system, the first communication device adopts the method B to determine the first transmission power.

[0248] In one possible implementation, when the third transmit power is determined based on the first path loss, the third transmit power may be determined based on the first path loss and at least one of the following: a first expected received power on a single RB, a first path loss compensation factor, the number of RBs occupied by the sensing signal, or a first subcarrier configuration factor. Exemplarily, the third transmit power may satisfy the following relationship:

[0249] Among them, P sense,PL (i) represents the third transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on a single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the sensing signal in time unit i, α sense Indicates the first path loss compensation factor, PL sense represents the first path loss, f sense Indicates the first closed-loop power control parameter.

[0250] The specific implementation of the third transmission power may refer to the relevant description of the fifth transmission power in the second approach of the method shown in FIG. 7 , and will not be repeated here.

[0251] In one possible implementation, the fourth transmit power is determined based on at least one of CBR, CR, or perceived priority. The specific implementation of the fourth transmit power can refer to the description of the sixth transmit power in the second approach of the method shown in FIG. 7 , and will not be repeated here.

[0252] As a possible implementation, in mode A or mode B, when the perception priority is higher than the communication priority, the second transmit power satisfies the following relationship:

[0253] P comm (i) = P CMAX -P sense (i) (17)

[0254] Among them, P comm (i) represents the second transmission power, P CMAX Indicates the maximum transmit power of the terminal, P sense (i) represents the first transmission power.

[0255] As another possible implementation, under mode A or mode B, when the perception priority is higher than the communication priority, the second transmission power can be 0, that is, it can be considered that no communication signal is sent.

[0256] When the communication priority is higher than the perception priority, the second transmit power may be determined in the following two ways:

[0257] Mode a: The second transmit power is determined based on the maximum transmit power of the terminal, the second path loss, and at least one of the following: a second expected received power on a single RB, a second path loss compensation factor, the number of RBs occupied by the communication signal, a second subcarrier configuration factor, a second closed-loop power control parameter, or a power offset value. The power offset value is determined by the MCS of the communication signal.

[0258] The specific implementation of the second path loss and the second transmission power may refer to the relevant descriptions of the second path loss and the fourth transmission power in the first approach of the method shown in FIG. 7 , and will not be repeated here.

[0259] Mode b: The second transmit power is determined based on the maximum transmit power of the terminal, the second path loss, and at least one of the following: the second expected receive power on a single RB, the second path loss compensation factor, the number of RBs occupied by the communication signal, and the second subcarrier configuration factor.

[0260] The specific implementation of the second path loss and the second transmission power may refer to the relevant descriptions of the second path loss and the fourth transmission power in the second approach of the method shown in FIG. 7 , and will not be repeated here.

[0261] As a possible implementation, in mode a or mode b, when the communication priority is higher than the perception priority, the first transmit power satisfies the following relationship:

[0262] P sense (i) = P CMAX -P comm (i)(18)

[0263] Among them, P sense (i) represents the first transmission power, P CMAX Indicates the maximum transmit power of the terminal, P comm (i) represents the second transmission power.

[0264] As another possible implementation, in mode A or mode B, when the communication priority is higher than the perception priority, the first transmission power may be 0, that is, it may be considered that no perception signal is sent.

[0265] In one possible implementation, when the perception priority is higher than the communication priority, the first transmit power minus the second transmit power is greater than or equal to a first threshold. When the communication priority is higher than the perception priority, the second transmit power minus the first transmit power is greater than or equal to a second threshold. The first threshold and the second threshold may be the same or different. The first and second thresholds may be predefined by the protocol or configured by the RAN node or control node, and this application does not specifically limit this.

[0266] Exemplarily, after determining the first transmit power and the second transmit power by the above method, the first transmit power or the second transmit power can be adjusted, for example, by multiplying it by a power control factor, so that the first transmit power and the second transmit power used when finally sending the perception signal and the communication signal respectively satisfy the above relationship that the difference is greater than or equal to the threshold.

[0267] Based on this solution, the difference between the transmission power of high-priority high signals and the transmission power of low-priority signals can be ensured to be greater than or equal to the threshold, thereby reducing the interference of low-priority signals on high-priority signals and ensuring the transmission performance of high-priority signals.

[0268] The method provided in this application is described above. In addition, this application also provides a communication device for implementing the functions described in the above method embodiments.

[0269] It is understandable that, in order to realize the above functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware 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.

[0270] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0271] Communication Device Figure 9 shows a schematic structural diagram of a communication device 90. The communication device 90 includes a processing module 901 and a transceiver module 902. The communication device 90 can be used to implement the functions of the first communication device or the second communication device described above.

[0272] In some embodiments, the communication device 90 may further include a storage module (not shown in FIG. 9 ) for storing program instructions and data.

[0273] In some embodiments, the transceiver module 902, which may also be referred to as a transceiver unit, is configured to implement a transmitting and / or receiving function. The transceiver module 902 may be composed of a transceiver circuit, a transceiver, a transceiver, or a communication interface.

[0274] In some embodiments, the transceiver module 902 may include a receiving module and a sending module, which are respectively used to execute the receiving and sending steps performed by the first communication device or the second communication device in the above method embodiments, and / or used to support other processes of the technology described herein; the processing module 901 may be used to execute the processing steps performed by the first communication device or the second communication device in the above method embodiments, and / or used to support other processes of the technology described herein.

[0275] When the communication device 90 is used to implement the function of the first communication device, in a possible implementation:

[0276] Processing module 901 is configured to determine a first transmit power and a second transmit power. Transceiver module 902 is configured to transmit a perception signal in a first time unit according to the first transmit power. Transceiver module 902 is further configured to transmit a communication signal in the first time unit according to the second transmit power. The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. The first transmit power is the product of the first power control factor and the third transmit power, and the second transmit power is the product of the second power control factor and the fourth transmit power. The third transmit power is determined based on the maximum transmit power and the fifth transmit power of the terminal. The fifth transmit power is determined based on the first path loss, or the fifth transmit power is the expected transmit power of the perception signal. The fourth transmit power is determined based on the maximum transmit power and the second path loss of the terminal.

[0277] Optionally, when the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal and the communication priority is higher than the perception priority, the processing module 901 is used to determine the first transmit power, including: the processing module 901 is used to adjust the first power control factor so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. Alternatively, when the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal and the communication priority is lower than the perception priority, the processing module 901 is used to determine the second transmit power, including: the processing module 901 is used to adjust the second power control factor so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal.

[0278] When the communication device 90 is used to implement the function of the first communication device, in another possible implementation:

[0279] The processing module 901 is used to determine a first transmit power and a second transmit power. The transceiver module 902 is used to send a perception signal in a first time unit according to the first transmit power; the transceiver module 902 is also used to send a communication signal in the first time unit according to the second transmit power. The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal. When the perception priority is higher than the communication priority, the first transmit power is determined based on the maximum transmit power of the terminal and the third transmit power, and the third transmit power is determined based on the first path loss, or the third transmit power is the expected transmit power of the perception signal, and the second transmit power is the difference between the maximum transmit power of the terminal and the first transmit power. Alternatively, when the communication priority is higher than the perception priority, the first transmit power is the difference between the maximum transmit power of the terminal and the second transmit power, and the second transmit power is determined based on the maximum transmit power of the terminal and the second path loss.

[0280] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module and will not be repeated here.

[0281] In the present application, the communication device 90 may be presented in the form of functional modules divided in an integrated manner. The "module" here may refer to a specific application-specific integrated circuit (ASIC), a circuit, a processor and memory that executes one or more software or firmware programs, an integrated logic circuit, and / or other devices that can provide the above functions.

[0282] In some embodiments, when the communication device 90 in Figure 9 is a chip or a chip system, the function / implementation process of the transceiver module 902 can be implemented through the input and output interface (or communication interface) of the chip or chip system, and the function / implementation process of the processing module 901 can be implemented through the processor (or processing circuit) of the chip or chip system.

[0283] Since the communication device 90 provided in this embodiment can execute the above method, the technical effects that can be obtained can refer to the above method embodiments and will not be repeated here.

[0284] As a possible product form, the first communication device or the second communication device described in the embodiments of the present application can be implemented using the following: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits capable of performing the various functions described throughout this application.

[0285] As another possible product form, the first communication device or the second communication device described in the embodiment of the present application can be implemented by a general bus architecture. For ease of explanation, refer to Figure 10, which is a structural diagram of a communication device 1000 provided in an embodiment of the present application, and the communication device 1000 includes a processor 1001 and a transceiver 1002. The communication device 1000 can be a first communication device, or a chip or chip system therein; or, the communication device 1000 can be a second communication device, or a chip or module therein. Figure 10 only shows the main components of the communication device 1000. In addition to the processor 1001 and the transceiver 1002, the communication device may further include a memory 1003, and an input and output device (not shown in the figure).

[0286] Optionally, the processor 1001 is mainly used to process the communication protocol and communication data, as well as to control the entire communication device, execute the software program, and process the data of the software program, thereby implementing the method provided in the above method embodiment. The memory 1003 is mainly used to store software programs and data. The transceiver 1002 may include a radio frequency circuit and an antenna. The radio frequency circuit is mainly used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, display screen, keyboard, etc., are mainly used to receive data input by the user and output data to the user.

[0287] Optionally, the processor 1001 , the transceiver 1002 , and the memory 1003 may be connected via a communication bus.

[0288] When the communication device is powered on, the processor 1001 can read the software program in the memory 1003, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 1001 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0289] In another implementation, the RF circuit and antenna may be provided independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be remotely arranged independent of the communication device.

[0290] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the above-mentioned communication device 90 may take the form of the communication device 1000 shown in FIG. 10 .

[0291] As an example, the functions / implementation process of the processing module 901 in FIG9 can be implemented by the processor 1001 in the communication device 1000 shown in FIG10 calling the computer-executable instructions stored in the memory 1003. The functions / implementation process of the transceiver module 902 in FIG9 can be implemented by the transceiver 1002 in the communication device 1000 shown in FIG10.

[0292] As another possible product form, the first communication device or the second communication device in this application may adopt the structure shown in Figure 11, or include the components shown in Figure 11. Figure 11 is a schematic diagram of the structure of a communication device 1100 provided in this application. The communication device 1100 may be a chip or system-on-chip in the first communication device or the second communication device; or, it may be a module, chip, or system-on-chip in the second communication device or the second communication device.

[0293] As shown in FIG11 , the communication device 1100 includes at least one processor 1101 and at least one communication interface ( FIG11 is merely illustrative, and is illustrated by taking one communication interface 1104 and one processor 1101 as an example). Optionally, the communication device 1100 may further include a communication bus 1102 and a memory 1103.

[0294] Processor 1101 may be a general-purpose central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Processor 1101 may also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0295] Communication bus 1102 is used to connect the various components in communication device 1100, enabling communication between them. Communication bus 1102 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, for example. This bus can be categorized as an address bus, a data bus, a control bus, and so on. For ease of illustration, FIG11 shows only one thick line, but this does not imply that there is only one bus or only one type of bus.

[0296] Communication interface 1104 is used to communicate with other devices or communication networks. Exemplarily, communication interface 1104 can be a module, circuit, transceiver, or any other device capable of communication. Optionally, communication interface 1104 can also be an input / output interface within processor 1101, used to implement signal input and output to the processor.

[0297] The memory 1103 may be a device with a storage function, used to store instructions and / or data, wherein the instructions may be computer programs.

[0298] Exemplarily, the memory 1103 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0299] It should be noted that the memory 1103 can exist independently of the processor 1101 or can be integrated with the processor 1101. The memory 1103 can be located within the communication device 1100 or outside the communication device 1100, without limitation. The processor 1101 can be used to execute instructions stored in the memory 1103 to implement the methods provided in the following embodiments of the present application.

[0300] As an optional implementation, the communication device 1100 may further include an output device 1105 and an input device 1106. The output device 1105 communicates with the processor 1101 and can display information in a variety of ways. For example, the output device 1105 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 1106 communicates with the processor 1101 and can receive user input in a variety of ways. For example, the input device 1106 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0301] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the communication device 90 shown in FIG. 9 may take the form of the communication device 1100 shown in FIG. 11 .

[0302] As an example, the functions / implementation process of the processing module 901 in FIG9 can be implemented by the processor 1101 in the communication device 1100 shown in FIG11 calling the computer-executable instructions stored in the memory 1103. The functions / implementation process of the transceiver module 902 in FIG9 can be implemented by the communication interface 1104 in the communication device 1100 shown in FIG11.

[0303] It should be noted that the structure shown in FIG11 does not constitute a specific limitation on the first communication device or the second communication device. For example, in other embodiments of the present application, the first communication device or the second communication device may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0304] In some embodiments, an embodiment of the present application further provides a communication device, which includes a processor for implementing the method in any of the above method embodiments.

[0305] As a possible implementation, the communication device further includes a memory. The memory is used to store necessary computer programs and data. The computer program may include instructions, and the processor may invoke the instructions in the computer program stored in the memory to instruct the communication device to execute any of the above-described method embodiments. Of course, the memory may not be located in the communication device.

[0306] As another possible implementation, the communication device also includes an interface circuit, which is a code / data read / write interface circuit, and the interface circuit is used to receive computer execution instructions (computer execution instructions are stored in a memory, may be read directly from the memory, or may pass through other devices) and transmit them to the processor.

[0307] As another possible implementation, the communication device further includes a communication interface, where the communication interface is used to communicate with a module outside the communication device.

[0308] It can be understood that the communication device can be a chip or a chip system. When the communication device is a chip system, it can be composed of chips or include chips and other discrete devices. The embodiments of the present application do not specifically limit this.

[0309] The present application also provides a computer-readable storage medium having a computer program or instruction stored thereon, which implements the functions of any of the above method embodiments when executed by a computer.

[0310] The present application also provides a computer program product, which implements the functions of any of the above method embodiments when executed by a computer.

[0311] Those skilled in the art will appreciate that, for the sake of convenience and brevity of description, the specific working processes of the above-described systems, devices, and units may refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0312] It is understood that the systems, devices, and methods described in this application may also be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection shown or discussed may be through some interface, indirect coupling or communication connection of devices or units, and may be electrical, mechanical, or other forms.

[0313] The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Components shown as units may or may not be physical units. Some or all of these units may be selected to achieve the objectives of this embodiment as needed.

[0314] 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.

[0315] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state drive (SSD)). In the embodiment of the present application, the computer may include the aforementioned device.

[0316] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and implement other changes to the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0317] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

Claims

1. A power control method, characterized in that: The method comprises: Determining a first transmit power and a second transmit power, where a sum of the first transmit power and the second transmit power is less than or equal to a maximum transmit power of the terminal; Sending a perception signal in a first time unit according to the first transmit power; transmitting a communication signal at the first time unit according to the second transmit power; The first transmit power is the product of the first power control factor and the third transmit power, the second transmit power is the product of the second power control factor and the fourth transmit power; the third transmit power is determined based on the maximum transmit power and the fifth transmit power of the terminal, the fifth transmit power is determined based on the first path loss, or the fifth transmit power is the expected transmit power of the perceived signal; the fourth transmit power is determined based on the maximum transmit power and the second path loss of the terminal.

2. The method according to claim 1, characterized in that The third transmission power satisfies the following relationship: sense (i) = min(P CMAX ,P sense,PL (i)) Among them, P sense (i) represents the third transmission power, i represents the index of the first time unit, P CMAX represents the maximum transmit power of the terminal, P sense,PL (i) represents the fifth transmission power, and min() represents a minimum value operation.

3. The method according to claim 1, characterized in that The third transmit power is determined according to the maximum transmit power of the terminal, the fifth transmit power, and the sixth transmit power; The sixth transmission power is determined based on at least one of the channel busy ratio CBR, the channel occupancy rate CR or the perception priority.

4. The method according to claim 3, characterized in that The third transmission power satisfies the following relationship: sense (i) = min(P CMAX ,P sense,C ,P sense,PL (i)) Among them, P sense (i) represents the third transmission power, i represents the index of the first time unit, P CMAX represents the maximum transmit power of the terminal, P sense,PL (i) represents the fifth transmission power, P sense,C represents the sixth transmission power, and min() represents the minimum value operation.

5. The method according to any one of claims 1 to 4, characterized in that The fifth transmit power is determined according to the first path loss and at least one of the following: A first expected received power on a single resource block RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, a first subcarrier configuration factor, or a first closed-loop power control parameter.

6. The method according to claim 5, characterized in that The fifth transmission power satisfies the following relationship: or, Among them, P sense,PL (i) represents the fifth transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on the single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the perception signal in time unit i, α sense Indicates the first path loss compensation factor, PL sense represents the first path loss, f sense represents the first closed-loop power control parameter.

7. The method according to any one of claims 1 to 6, characterized in that The fourth transmit power is determined according to the maximum transmit power of the terminal, the second path loss, and at least one of the following: The second expected received power on a single RB, the second path loss compensation factor, the number of RBs occupied by the communication signal, the second subcarrier configuration factor, the second closed-loop power control parameter, or the power offset value, wherein the power offset value is determined by the modulation and coding scheme MCS of the communication signal.

8. The method according to any one of claims 1 to 7, characterized in that When the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal and the communication priority is higher than the perception priority, determining the first transmit power includes: adjusting the first power control factor so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal; or, When the sum of the third transmit power and the fourth transmit power is greater than the maximum transmit power of the terminal and the communication priority is lower than the perception priority, determining the second transmit power includes: The second power control factor is adjusted so that the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the terminal.

9. The method according to any one of claims 1 to 8, characterized in that When the perception priority is higher than the communication priority, the first transmit power minus the second transmit power is greater than or equal to a first threshold; or, When the communication priority is higher than the perception priority, the second transmit power minus the first transmit power is greater than or equal to a second threshold.

10. A power control method, characterized in that: The method comprises: Determining a first transmit power and a second transmit power, where a sum of the first transmit power and the second transmit power is less than or equal to a maximum transmit power of the terminal; Sending a perception signal in a first time unit according to the first transmit power; transmitting a communication signal at the first time unit according to the second transmit power; Wherein, when the perception priority is higher than the communication priority, the first transmit power is determined based on the maximum transmit power of the terminal and a third transmit power, the third transmit power is determined based on the first path loss, or the third transmit power is the expected transmit power of the perception signal, and the second transmit power is the difference between the maximum transmit power of the terminal and the first transmit power; Alternatively, when the communication priority is higher than the perception priority, the first transmit power is the difference between the maximum transmit power of the terminal and the second transmit power, and the second transmit power is determined based on the maximum transmit power of the terminal and the second path loss.

11. The method according to claim 10, characterized in that The first transmission power satisfies the following relationship: sense (i) = min(P CMAX ,P sense,PL (i)) Among them, P sense (i) represents the first transmission power, i represents the index of the first time unit, P CMAX represents the maximum transmit power of the terminal, P sense,PL (i) represents the third transmission power, and min() represents a minimum value operation.

12. The method according to claim 10, characterized in that The first transmit power is determined according to the maximum transmit power of the terminal, the third transmit power, and the fourth transmit power; The fourth transmission power is determined based on at least one of the channel busy ratio CBR, the channel occupancy rate CR or the perception priority.

13. The method according to claim 12, characterized in that The first transmission power satisfies the following relationship: sense (i) = min(P CMAX ,P sense,C ,P sense,PL (i)) Among them, P sense (i) represents the first transmission power, i represents the index of the first time unit, P CMAX represents the maximum transmit power of the terminal, P sense,PL (i) represents the third transmission power, P sense,C represents the fourth transmission power, and min() represents the minimum value operation.

14. The method according to any one of claims 10 to 13, characterized in that: The third transmit power is determined according to the first path loss and at least one of the following: A first expected received power on a single resource block RB, a first path loss compensation factor, the number of RBs occupied by the perception signal, a first subcarrier configuration factor, or a first closed-loop power control parameter.

15. The method according to claim 14, characterized in that The third transmission power satisfies the following relationship: or, Among them, P sense,PL (i) represents the third transmission power, i represents the index of the first time unit, P 0,sense represents the first expected received power on the single RB, μ1 represents the first subcarrier configuration factor, represents the number of RBs occupied by the perception signal in time unit i, α sense Indicates the first path loss compensation factor, PL sense represents the first path loss, f sense represents the first closed-loop power control parameter.

16. The method according to any one of claims 10 to 15, characterized in that: The second transmit power is determined according to the maximum transmit power of the terminal, the second path loss, and at least one of the following: The second expected received power on a single RB, the second path loss compensation factor, the number of RBs occupied by the communication signal, the second subcarrier configuration factor, the second closed-loop power control parameter, or the power offset value, wherein the power offset value is determined by the modulation and coding scheme MCS of the communication signal.

17. The method according to any one of claims 10 to 16, characterized in that: When the perception priority is higher than the communication priority, the second transmission power satisfies the following relationship: comm (i) = P CMAX -P sense (i) or, When the communication priority is higher than the perception priority, the first transmit power satisfies the following relationship: P sense (i)=P CMAX -P comm (i) Among them, P comm (i) represents the second transmission power, P CMAX represents the maximum transmit power of the terminal, P sense (i) represents the first transmission power.

18. The method according to any one of claims 10 to 17, characterized in that: When the perception priority is higher than the communication priority, the first transmit power minus the second transmit power is greater than or equal to a first threshold; or When the communication priority is higher than the perception priority, the second transmit power minus the first transmit power is greater than or equal to a second threshold.

19. A communication device, characterized in that: The communication device includes a module for executing the method according to any one of claims 1 to 9, or includes a module for executing the method according to any one of claims 10 to 18.

20. A communication device, characterized in that: The communication device includes a processor; the processor is configured to run a computer program or instruction to enable the communication device to perform the method according to any one of claims 1 to 9, or to enable the communication device to perform the method according to any one of claims 10 to 18.

21. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the method according to any one of claims 1 to 9 is executed, or the method according to any one of claims 10 to 18 is executed.

22. A computer program product, characterized in that The computer program product includes computer instructions; when part or all of the computer instructions are run on a computer, the method according to any one of claims 1 to 9 is executed, or the method according to any one of claims 10 to 18 is executed.

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