Communication method and communication apparatus

Abstract

The application provides a communication method and a communication device. The method comprises: receiving first information, the first information being used for indicating a time period for transmitting a sensing signal and a time period for receiving the sensing signal in M time periods, a first cell belonging to the first access network device, and the first cell being included in N cells; transmitting the sensing signal in the time period for transmitting the sensing signal, and receiving the sensing signal from a second cell in the time period for receiving the sensing signal and transmitting second information based on the received sensing signal of the second cell, the second information being used for indicating whether there is a frequency offset between a frequency of the sensing signal transmitted by the second cell and a frequency of the sensing signal transmitted by the first cell, and the second cell being included in the N cells. The technical scheme can be used for improving the accuracy of sensing.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly to a communication method and a communication device. Background Technology

[0002] With the continuous development of communication technology, mobile communication systems have gradually evolved into a unified infrastructure of integrated sensing and communication (ISAC). In other words, in addition to communication capabilities, mobile communication systems also have wireless sensing capabilities, enabling them to provide sensing services.

[0003] For communication systems that can provide sensing services, improving the accuracy of sensing has become an urgent technical problem to be solved. Summary of the Invention

[0004] This application provides a communication method and a communication device that can be used to improve the accuracy of perception.

[0005] Firstly, this application provides a communication method that can be executed by a first access network device. Unless otherwise specified, the first access network device in this application can refer to the first access network device itself, or a component in the first access network device (e.g., a processor, circuit, chip, or chip system), or a logic module or software capable of implementing all or part of the functions of the first access network device, taking the first communication device itself as an example.

[0006] The communication method includes: receiving first information, the first information indicating the time periods for a first cell to transmit sensing signals and the time periods for receiving sensing signals within M time periods, the first cell belonging to a first access network device, the first cell being included in N cells; transmitting sensing signals during the time periods for transmitting sensing signals, and receiving sensing signals from a second cell during the time periods for receiving sensing signals and transmitting second information based on the received sensing signals from the second cell, the second information indicating whether there is a frequency offset between the frequency of the sensing signals transmitted by the second cell and the frequency of the sensing signals transmitted by the first cell, the second cell being included in N cells.

[0007] Understandably, transmitting a sensing signal during the time period corresponding to the first cell's transmission of sensing signals means that the first cell in the first access network device transmits a sensing signal during the corresponding time period of the first cell's transmission of sensing signals. In this application, the first cell does not receive sensing signals transmitted by other cells when transmitting sensing signals.

[0008] In this application, "the first cell receiving the sensing signal from the second cell during the time period corresponding to the receiving sensing signal in the first cell" means that the first cell in the first access network device receives the sensing signal from the second cell during the time period corresponding to the receiving sensing signal in the first cell. In this application, the first cell does not transmit sensing signals while receiving sensing signals.

[0009] In other words, when the first cell is sending sensing signals, it does not receive sensing signals from other cells, and when the first cell is receiving sensing signals, it does not send sensing signals.

[0010] In the technical solution provided in the first aspect, the first access network device determines whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the received sensing signal from the second cell, and reports the result of whether there is a frequency offset to the network management device. In this application, whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell can also be referred to as whether there is a frequency offset between the second cell and the first cell.

[0011] For example, transmitting second information based on the received sensing signal from the second cell includes: sensing based on the received sensing signal from the second cell to obtain the energy spectrum of distance and velocity corresponding to the second cell; determining whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the energy spectrum of distance and velocity; and transmitting the second information.

[0012] Frequency offset between the second cell and the first cell can affect the accuracy of the first cell's sensing capabilities. The technical solution of this application can filter out N cells that have frequency offsets with the first cell, thus improving the accuracy of the first cell's sensing capabilities. For example, when a frequency offset is determined between the second cell and the first cell, the clock of the second cell can be adjusted to eliminate the frequency offset, thereby improving the accuracy of the first cell's sensing capabilities.

[0013] In conjunction with the first aspect, in one possible implementation, the M time periods include the first time period, and all N cells only receive sensing signals during the first time period.

[0014] In one example, the first time period is the first of M time periods.

[0015] This implementation method can detect whether there are cells that are not among the aforementioned N cells. For example, if the first access network device receives a sensing signal and determines based on the sensing signal that there is a frequency offset between the cell that sent the sensing signal and the first cell, then since all N cells only receive sensing signals in the first time period, that is, none of the N cells send sensing signals in the first time period, this indicates that there are cells outside the aforementioned N cells that have a frequency offset from the first cell.

[0016] In conjunction with the first aspect, in one possible implementation, before receiving the first information, the method further includes: receiving third information, the third information being used to instruct the first cell to initiate a frequency offset detection task; and sending fourth information, the fourth information being used to instruct confirmation of initiating the frequency offset detection task.

[0017] Secondly, this application provides a communication method applied to a network management device, comprising: sending first information, the first information being used to indicate the time periods during which a first cell sends sensing signals and the time periods during which it receives sensing signals within M time periods, the first cell belonging to a first access network device, the first cell being included in N cells; and receiving second information from the first access network device, the second information being used to indicate whether there is a frequency offset between the frequency of the sensing signal sent by the second cell and the frequency of the sensing signal sent by the first cell, the second cell being included in N cells.

[0018] In conjunction with the second aspect, in one possible implementation, the M time periods include the first time period, and all N cells only receive sensing signals during the first time period.

[0019] In conjunction with the second aspect, in one possible implementation, before sending the first information, the method further includes: sending third information to the first access network device, the third information being used to instruct the first cell to start a frequency offset detection task; sending the first information includes: in response to receiving a fifth information, sending the third information to the first access network device, the fifth information being used to instruct the start of a frequency offset detection task.

[0020] In conjunction with the second aspect, in one possible implementation, sending the third information to the first access network device includes: in response to receiving the fifth information, sending the third information to the first access network device, wherein the fifth information is used to instruct the initiation of the frequency offset detection task.

[0021] Thirdly, this application provides a communication device including modules or units for implementing the methods of the first aspect and any possible implementation thereof. It should be understood that each module or unit can implement its corresponding function by executing a computer program.

[0022] Fourthly, this application provides a communication device including modules or units for implementing the methods of the second aspect and any possible implementation thereof. It should be understood that each module or unit can implement its corresponding function by executing a computer program.

[0023] Fifthly, this application provides a communication device including a processor for executing the communication method described in the first aspect or any possible implementation thereof. The communication device may be a chip or chip system applied in an access network device.

[0024] The device may further include a memory for storing instructions and data. The memory is coupled to the processor, which, when executing the instructions stored in the memory, can implement the methods described in the first aspect or any of the possible implementations. The device may also include a communication interface for communicating with other devices; exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0025] Sixthly, this application provides a communication device including a processor for executing the communication method described in the second aspect or any possible implementation thereof. The communication device may be a chip or chip system applied in a network management device.

[0026] The device may further include a memory for storing instructions and data. The memory is coupled to the processor, which, when executing the instructions stored in the memory, can implement the methods described in the second aspect or any of the possible implementations above. The device may also include a communication interface for communicating with other devices; exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0027] In a seventh aspect, this application provides a computer-readable storage medium storing program code for execution by a communication device, the program code including instructions for implementing the methods of the first aspect and any possible implementation of the first aspect.

[0028] Eighthly, this application provides a computer-readable storage medium storing program code for execution by a communication device, the program code including instructions for implementing the methods of the second aspect and any possible implementation of the second aspect.

[0029] Ninthly, this application provides a computer program product containing instructions that, when the computer program product is run on a communication device, causes the communication device to implement the method of the first aspect and any possible implementation of the first aspect.

[0030] In a tenth aspect, this application provides a computer program product containing instructions that, when the computer program product is run on a communication device, causes the communication device to implement the methods of the second aspect and any possible implementation of the second aspect.

[0031] Eleventhly, this application provides a communication system comprising communication means for implementing the methods of the first aspect and any possible implementation thereof, and / or communication means for implementing the methods of the second aspect and any possible implementation thereof. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of one type of radar-sensing target provided in this application;

[0033] Figure 2 This is a schematic diagram of one method of radar sensing the speed of a moving target provided in this application;

[0034] Figure 3 This is a schematic diagram of the architecture of a communication system applicable to the embodiments of this application;

[0035] Figure 4 This is a schematic diagram of a synesthetic frame provided in this application;

[0036] Figure 5 This is a schematic diagram of the interference from a neighboring station to the sensing station provided in this application;

[0037] Figure 6 This is a schematic diagram illustrating the scenarios in which the communication method provided in this application can be applied;

[0038] Figure 7 This is a schematic diagram of the energy spectrum of the distance velocity provided in this application;

[0039] Figure 8 This is a flowchart illustrating a communication method provided in one embodiment of this application;

[0040] Figure 9 This is a schematic diagram illustrating how each cell takes turns sending sensing signals, according to one embodiment of this application.

[0041] Figure 10 This is a schematic diagram illustrating how to detect the presence of frequency offset according to an embodiment of this application;

[0042] Figure 11 This is a schematic diagram illustrating how each cell takes turns sending sensing signals, according to one embodiment of this application.

[0043] Figure 12 This is a structural schematic diagram of a communication device provided in one embodiment of this application;

[0044] Figure 13 This is a structural schematic diagram of a communication device provided in one embodiment of this application. Detailed Implementation

[0045] First, some terms used in the embodiments of this application will be briefly explained. It should be understood that these explanations are only for the purpose of understanding the embodiments of this application and should not constitute any limitation on this application.

[0046] 1. Doppler effect

[0047] The Doppler effect states that when either the wave source or the observer is moving relative to the medium, the frequency received by the observer differs from the vibration frequency of the wave source. If both the wave source and the observer are stationary relative to the medium, the wave frequency is the same as the vibration frequency of the wave source, and the frequency received by the observer is also the vibration frequency of the wave source. However, if either the wave source or the observer is moving relative to the medium, the frequency received by the observer differs from the vibration frequency of the wave source.

[0048] 2. Radar

[0049] Radar consists of a transmitting antenna and a receiving antenna. The transmitting antenna sends out electromagnetic wave signals. If these signals encounter a target (or object), they are reflected. The reflected electromagnetic wave signals (also called echo signals or reflected radio wave signals) can then be received by the receiver. For example, ... Figure 1 As shown, ground radar emits electromagnetic wave signals. When the electromagnetic wave signals encounter the target aircraft, they are reflected and the reflected waves are received by the radar.

[0050] Radar can extract information about a target based on received echo signals, such as the target's range, azimuth, and speed. This technique of extracting target-related information from reflected echo signals is often referred to as radar sensing technology.

[0051] It should be noted that the targets involved in this application can be various tangible objects capable of reflecting electromagnetic waves, such as mountains, forests, or buildings, and can also include movable objects such as vehicles, drones, pedestrians, and terminal devices. The target can also be referred to as a target object, a sensed target, a sensed target, a detected target, a sensed object, a detected object, etc., and the embodiments of this application do not limit this terminology.

[0052] Radar sensing has many unique advantages. For example, radar is not affected by light or darkness, has the ability to penetrate obstructions, and can better protect personal privacy; radar can detect objects at a greater distance and will not cause harm to people or animals.

[0053] 3. Radar speed measurement

[0054] Radar systems employ various velocity measurement methods. Velocity measurement based on the Doppler effect is one such method.

[0055] Understandably, due to the Doppler effect, after a radar emits an electromagnetic wave signal, if that signal encounters a moving target, the frequency of the echo signal received by the radar after the target reflects the signal is different from the frequency of the emitted signal. For example, ... Figure 2 As shown, a ground radar emits electromagnetic wave signals. An aircraft approaches the radar at a certain speed. The electromagnetic wave signals are reflected after hitting the aircraft. The reflected echo signals are then received by the radar. The frequency of the echo signals received by the radar is different from the frequency of the electromagnetic wave signals emitted by the radar.

[0056] Radar can obtain the radial velocity of a target by measuring the frequency shift (i.e., Doppler shift) between the frequency of the electromagnetic waves emitted by the radar and the frequency of the echo signal received by the radar.

[0057] For example, if the frequency of the electromagnetic wave signal emitted by the radar is ft, and assuming the target moves towards the radar at a relative velocity v, then the frequency of the echo signal received by the radar is... The radar calculates the Doppler frequency shift based on the frequency ft of the electromagnetic wave signal emitted by the radar and the frequency fr of the echo signal received by the radar. Furthermore, the relative velocity is obtained. λt is the wavelength of the electromagnetic wave signal emitted by the radar.

[0058] The technical solution of this application will now be described in conjunction with the accompanying drawings.

[0059] Before introducing the technical solution proposed in this application, the communication system to which the technical solution of this application is applicable will be introduced first.

[0060] For example, Figure 3 This is a schematic diagram of the architecture of a communication system 1000 applicable to an embodiment of this application. It is understood that the communication system described in this application embodiment is for the purpose of more clearly illustrating the technical solutions of this application embodiment and does not constitute a limitation on the technical solutions provided in this application embodiment.

[0061] like Figure 3 As shown, the communication system 1000 includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (e.g., Figure 3 110a and 110b, collectively referred to as 110, may also include at least one terminal (such as...). Figure 3 RAN100, denoted as RAN100, comprises RAN nodes 120a-120j, collectively referred to as RAN120. RAN100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 3 (Not shown in the image). Terminal 120 is wirelessly connected to RAN node 110. Terminals and RAN nodes can be interconnected via wired or wireless means. Communication system 1000 may also include core network 200. RAN node 110 is connected to core network 200 via wireless or wired means. The core network equipment in core network 200 and RAN node 110 in RAN 100 can be independent physical devices, or they can be the same physical device integrating the logical functions of core network equipment and RAN node. Communication system 1000 may also include Internet 300.

[0062] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP). RAN100 can also include two or more of the above-mentioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0063] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access communication systems wirelessly. In one application scenario, an RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, or a base station in a future mobile communication system. RAN nodes can also be macro base stations (such as...). Figure 3 110a in the text), can also be a micro base station or an indoor station (such as... Figure 3 In section 110b), it can also be a relay node or a donor node. RAN nodes can also be devices used for terminal access in non-terrestrial networks, such as satellites or drones.

[0064] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes or integrated into the same RAN node, such as within a baseband unit (BBU). The RU can be included in radio frequency equipment, such as in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0065] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, a RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0066] A terminal is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminals can also be called terminal equipment, 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 grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal.

[0067] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.

[0068] The roles of base stations and terminals can be relative, for example, Figure 3 The helicopter or drone 120i can be configured as a mobile base station. For terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol; in this case, 120i is also a base station relative to 110a. Therefore, both base stations and terminals can be collectively referred to as communication devices. Figure 3 The 110a and 110b in the text can be referred to as communication devices with base station functions. Figure 3 The 120a-120j in the text can be referred to as communication devices with terminal functions.

[0069] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0070] In this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0071] With the continuous development of mobile communication technology, communication systems have gradually evolved into a unified infrastructure of integrated sensing and communication (ISAC). Access network equipment (such as base stations) in a communication system can be used not only for communication but also for target sensing to extract information about the target (such as its distance, orientation, and speed). In other words, access network equipment can have both communication and wireless sensing capabilities.

[0072] In this application, access network equipment with sensing capabilities is also referred to as a sensing station.

[0073] In this application, the signal used for communication is referred to as a communication signal, and the signal used for sensing is referred to as a sensing signal. It should be understood that the naming here is merely an example and does not constitute a limitation of this application. For example, a communication signal may also be called a communication message, and a sensing signal may also be called a sensing message, etc.

[0074] For example, Figure 4 A schematic diagram of a synesthetic frame is shown. (For example...) Figure 4 As shown, the synergistic frame consists of D slots, S slots, and U slots. Specifically, D slot represents the downlink (DL) slot, S slot represents the special (S) slot, and U slot represents the uplink (UL) slot.

[0075] Access network devices can transmit sensing signals in some D time slots. In this application, D time slots that can be used to transmit sensing signals are also referred to as sensing time slots. Correspondingly, time slots that are not used by access network devices to transmit sensing signals are referred to as non-sensing time slots; that is, non-sensing time slots are only used by access network devices to transmit communication signals. For example, in the 4.9 GHz band, the duration of a sensing frame is 640 milliseconds (ms), and 2 D time slots out of every 10 slots (0.5 ms) are sensing time slots.

[0076] The sensing time slot includes 14 symbols: symbols 0 to 6 are used to transmit sensing signals, and symbols 7 to 13 are used to transmit communication signals.

[0077] However, current access network devices suffer from low accuracy in sensing.

[0078] Analysis revealed that frequency offset between access network devices leads to low sensing accuracy. Specifically, frequency offset between two access network devices refers to a frequency difference between the sensing signals transmitted by the cells of the two access network devices.

[0079] For example, taking a base station as an access network device, if base station A can achieve sensing, and there is a base station B in the communication system that has a frequency offset from base station A and base station B is stationary, then after the signal sent by base station B is received by base station A, there will be a frequency offset between the frequency of the electromagnetic wave received by base station A and the frequency of the electromagnetic wave signal sent by base station A. At this time, base station A will think that base station B is a moving target, but in fact base station B is stationary. That is, the sensing signal sent by base station B interferes with sensing station A, causing inaccurate sensing by sensing station A.

[0080] For example, such as Figure 5 As shown in the diagram, a sector represents a cell. The network includes sites 1, 2, 3, 4, 5, and 6. Each site contains one or more cells. For example, if the cell marked 21 in site 1 has insufficient satellite acquisition, the frequency of its transmitted signal will deviate from the frequency of signals transmitted by other cells. If the signal transmitted by cell 21 in site 1 is received by cells marked 22 in site 4 and 21 in site 5, and assuming that sites 4 and 5 are capable of sensing, the frequency deviation of the transmitted signal from cell 21 in site 1 will lead to inaccurate reception by sites 4 and 5.

[0081] Therefore, detecting cells with frequency offset is crucial for achieving accurate sensing.

[0082] To detect cells with frequency offset, one approach is as follows: For example, if there are N cells to be detected, manually turn on one cell to transmit sensing signals, and turn off the transmission of sensing signals in the other cells and only receive sensing signals. Then, manually use a frequency sweeper to detect which cell introduced the frequency offset signal, and repeat this process for all the cells to be detected.

[0083] However, the aforementioned method of manually detecting cells with frequency deviations is costly, time-consuming, and extremely inefficient.

[0084] In view of this, this application provides a communication method and a communication device that can detect cells with frequency offset in order to improve the accuracy of sensing.

[0085] Figure 6 The diagram illustrates a scenario in which the communication method provided in this application can be applied. For example... Figure 6 As shown, this scenario includes a network management device and at least one access network device. This at least one access network device can sense the target; therefore, it is also called a sensing station. Specifically, each sensing station can receive information from the network management device, and each station can also send information to the network management device.

[0086] It should be noted that, Figure 6 This example uses only three sensing devices and does not constitute a limitation of the embodiments described in this application. For example, it may include more sensing stations, or it may include two sensing stations.

[0087] Furthermore, before introducing the embodiments of this application, the principle of the communication method provided in this application will be explained:

[0088] Figure 7 (a) shows a schematic diagram of the energy spectrum of distance velocity obtained by cell 1 based on the received sensing signal of cell 2 when there is no frequency offset between cells. Figure 7 (b) shows a schematic diagram of the energy spectrum of distance velocity obtained by cell 1 based on the received sensing signal of cell 2 when there is frequency offset between cells.

[0089] like Figure 7 As shown in Figure (a), the horizontal axis of the energy spectrum of distance and velocity represents V, i.e., the velocity of the target, and the vertical axis represents distance, i.e., the distance between the target and the sensing station. The point in the figure corresponding to a velocity of x and a distance of y from the sensing station represents the energy of the reflected wave from a target with velocity x and a distance of y from the sensing station. Figure 7 As shown in (a) above, when there is no frequency offset between the two cells, the energy spectrum of the range velocity contains only one vertical stripe with zero velocity. Figure 7As shown in (b), when there is a frequency offset between two cells, the energy spectrum of range velocity exhibits vertical fringes outside the zero velocity range. Therefore, the presence of a frequency offset between two cells can be determined by analyzing the energy spectrum of range velocity.

[0090] The communication method provided in the embodiments of this application will now be described with reference to the accompanying drawings. It is understood that this application uses access network equipment and network management equipment as examples of the execution entities in the interactive illustration, but this application does not limit the execution entities in the interactive illustration. For example, the method executed by the access network equipment in this application can also be implemented by modules (e.g., circuits, chips, or chip systems) in the access network equipment, or by logical nodes, logical modules, or software that can implement all or part of the functions of the access network equipment; the method executed by the network management equipment in this application can also be implemented by a communication module in the network management equipment or by circuits or chips (such as modem chips (also known as baseband chips), or SoC chips containing modem cores, or SIP chips) in the network management equipment responsible for communication functions.

[0091] Figure 8 This is a schematic flowchart of the communication method provided in this application. Figure 8 As shown, the method includes:

[0092] S810, the network management device sends first information to the first access network device, and the first access network device receives the first information accordingly; the first information is used to indicate the time period for the first cell to send sensing signals and the time period for receiving sensing signals within M time periods, the first cell belongs to the first access network device, and the first cell is included in N cells.

[0093] For example, the aforementioned network management equipment could be a mobile network automation engine (MAE) or operation administration and maintenance (OAM).

[0094] The aforementioned first access network device refers to the access network device to which the first cell belongs. It can also be understood that the first access network device is the access network device corresponding to the first cell.

[0095] In this application, the network management device sends first information to the access network device to which the first cell belongs. This first information indicates the time periods during which the first cell transmits and receives sensing signals within M time periods. Alternatively, it can be understood that the first information indicates which time periods within the M time periods the first cell transmits and receives sensing signals. Or, the network management device uses the first information to instruct the first cell on the timing of transmitting and receiving sensing signals. These time periods can also be referred to as periods.

[0096] One method for a network management device to determine the duration of each of M time periods is as follows: receiving indication information, which indicates the duration of each of the M time periods. For example, the indication information indicates that the duration of each of the M time periods is X minutes.

[0097] For example, the first information includes M bits corresponding to the first cell, and these M bits correspond one-to-one with M time periods. For each of the M bits, a value of 1 indicates that a sensing signal is transmitted during the time period corresponding to that bit, and a value of 0 indicates that a sensing signal is received during the time period corresponding to that bit. Alternatively, for each bit included in each sub-information, a value of 0 indicates that a sensing signal is transmitted during the time period corresponding to that bit, and a value of 1 indicates that a sensing signal is received during the time period corresponding to that bit.

[0098] It should be noted that in this application, when the first cell transmits a sensing signal, it does not receive sensing signals from other cells. Furthermore, when the first cell receives a sensing signal, it does not transmit a sensing signal.

[0099] In this application, the first cell can be any one of N cells. These N cells are also called the N cells to be detected. That is, the network management device will indicate to the N cells the time periods during which it transmits sensing signals and the time periods during which it receives sensing signals in M ​​time periods. In this application, for the i-th time period in the M time periods, if the number of cells transmitting sensing signals in the i-th time period is N1, then the number of cells receiving sensing signals in the i-th time period is N-N1, where i is greater than or equal to 1 and i is less than or equal to N.

[0100] S820, the first access network device transmits a sensing signal during the time period corresponding to the first cell, and receives a sensing signal from a second cell during the time period corresponding to the first cell, and transmits second information based on the received sensing signal from the second cell. The second information is used to indicate whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell. The second cell is included in N cells.

[0101] Specifically, S820 includes S820a and S820b:

[0102] S820a: The first access network device transmits a sensing signal during the time period corresponding to the transmission of sensing signals in the first cell, and receives a sensing signal from the second cell during the time period corresponding to the reception of sensing signals in the first cell, and determines whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the received sensing signal from the second cell.

[0103] In this application, after the network management device indicates the time period for transmitting sensing signals corresponding to the first cell through the first information, it transmits sensing signals for the first cell in the first access network device during the corresponding time period. It is understood that, in this application, transmitting sensing signals during the corresponding time period for transmitting sensing signals of the first cell means that the first cell transmits sensing signals during the corresponding time period and does not receive sensing signals transmitted by other cells; that is, the first cell only transmits sensing signals and does not receive sensing signals during the time period.

[0104] In this application, after the network management device indicates the time period for receiving sensing signals corresponding to the first cell through the first information, it receives sensing signals for the first cell in the first access network device during the time period corresponding to the receiving sensing signals of the first cell. It is understood that in this application, transmitting sensing signals during the time period corresponding to the receiving sensing signals of the first cell means that the first cell receives sensing signals but does not transmit them during the corresponding time period; that is, the first cell only receives sensing signals and does not transmit them during the time period.

[0105] In this application, the first access network device receives a sensing signal from the second cell during the time period corresponding to the reception of sensing signals in the first cell, and determines whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the received sensing signal from the second cell. In this application, whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell can also be understood as whether there is a frequency offset between the second cell and the first cell. That is, in this application, the first cell measures whether there is a frequency offset between the second cell and the first cell based on the received sensing signal from the second cell during the time period of receiving sensing signals.

[0106] As mentioned above, after obtaining the energy spectrum of distance and velocity, if vertical stripes other than 0 velocity are present on the energy spectrum, it indicates a frequency deviation between the signal received by the sensing device and the signal transmitted by the sensing device. Therefore, in this application, one implementation of the first access network device determining the frequency offset based on the received sensing signal of the second cell includes: sensing based on the received sensing signal of the second cell to obtain the energy spectrum of distance and velocity corresponding to the second cell; and determining whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the energy spectrum of distance and velocity. For example, if the energy spectrum of distance and velocity indicates the presence of vertical stripes other than 0 velocity, it indicates a frequency offset between the second cell and the first cell. If the energy spectrum of distance and velocity indicates the absence of vertical stripes other than 0 velocity, it indicates no frequency offset between the second cell and the first cell.

[0107] In one implementation, such as Figure 9 As shown, when the first access network device receives a sensing signal from the second cell and detects whether there is a frequency offset between the second cell and the first cell during the time period (e.g., time period 1) corresponding to the receiving sensing signal of the first cell, if the first access network device detects a frequency offset between the second cell and the first cell for a continuous duration of X1 within time period 1, then it is determined that there is a frequency offset between the second cell and the first cell. X1 is less than X. At this time, the first access network device can turn off receiving sensing signals, thereby reducing detection power consumption. For example, if the duration of each of the configured M time periods is 5 minutes, and the first cell receives a sensing signal during time period 1 of the M time periods, then if the first access network device detects whether there is a frequency offset between the second cell and the first cell for a continuous duration of 1 minute within time period 1, then it can be determined that there is a frequency offset between the second cell and the first cell.

[0108] S820b: The first access network device sends second information to the network management device. The second information is used to indicate whether there is a frequency offset between the frequency of the sensing signal sent by the second cell and the frequency of the sensing signal sent by the first cell.

[0109] In this embodiment of the application, the first access network device can report the result of determining whether there is a frequency offset between the first cell and the second cell to the network management device. For example, the first access network device sends second information to the network management device, the second information being used to indicate whether there is a frequency offset between the second cell and the first cell.

[0110] Optionally, the first access network device sends the second information to the network management device only when there is a frequency offset between the second cell and the first cell. Understandably, in this implementation, the second information is used to indicate that there is a frequency offset between the second cell and the first cell.

[0111] It should be noted that this application does not impose any restriction on whether the number of cells transmitting sensing signals is the same in each of the M time periods.

[0112] In one implementation, M time periods can detect all cells with frequency offsets among N cells. This can also be understood as ensuring that each of the N cells sends a sensing signal at least once.

[0113] For example, in the first implementation, only one cell transmits the sensing signal in each of the M time periods, while the remaining N-1 cells receive the sensing signal. In this implementation, M can be equal to N. That is, only one cell transmits the sensing signal in each time period, and the cells transmitting the sensing signal are different in different time periods of these M time periods.

[0114] For example, suppose there are 5 cells: cell A, cell B, cell C, cell D, and cell E, where N equals 5. As shown in Table 1, M equals 5. Then the network management device can instruct:

[0115] Cell A sends a sensing signal in the first time period, and cells B, C, D, and E all receive the sensing signal in the first time period. Cell B sends a sensing signal in the second time period, and cells A, C, D, and E all receive the sensing signal in the second time period. Cell C sends a sensing signal in the third time period, and cells A, B, D, and E all receive the sensing signal in the third time period. Cell D sends a sensing signal in the fourth time period, and cells A, B, C, and E all receive the sensing signal in the fourth time period. Cell E sends a sensing signal in the fifth time period, and cells A, B, C, and D all receive the sensing signal in the fifth time period. In other words, the instruction is:

[0116] Cell A only sends sensing signals in the first time period, and only receives sensing signals in the second, third, fourth and fifth time periods.

[0117] Cell B only sends sensing signals during the second time period, and only receives sensing signals during the first, third, fourth and fifth time periods.

[0118] Cell C only sends sensing signals during the third time period, and only receives sensing signals during the first, second, fourth, and fifth time periods.

[0119] Cell D only sends sensing signals in the fourth time period, and only receives sensing signals in the first, second, third and fifth time periods.

[0120] Cell E only sends sensing signals during the 5th time period, and only receives sensing signals during the 1st, 2nd, 3rd and 4th time periods.

[0121] Table 1

[0122] First period Second period The third period 4th period 5th period Community A send take over take over take over take over Community B take over send take over take over take over Community C take over take over send take over take over Community D take over take over take over send take over Community E take over take over take over take over send

[0123] refer to Figure 10 , Figure 10 This diagram illustrates the transmission and reception of sensing signals in cells A, B, C, D, and E. Figure 10As shown, in the first time period, cell A sends a sensing signal, and other cells receive the sensing signal from cell A. In the second time period, cell B sends a sensing signal, and other cells receive the sensing signal from cell B. In the third time period, cell C sends a sensing signal, and other cells receive the sensing signal from cell C. In the fourth time period, cell D sends a sensing signal, and other cells receive the sensing signal from cell D. In the fifth time period, cell E sends a sensing signal, and other cells receive the sensing signal from cell E.

[0124] Understandably, in the first time period, cells B, C, D, and E can all detect frequency offsets with cell A based on the sensing signal transmitted by cell A. In the second time period, cells A, C, D, and E can all detect frequency offsets with cell B based on the sensing signal transmitted by cell B. In the third time period, cells A, B, D, and E all detect frequency offsets with cell C based on the sensing signal transmitted by cell C. In the fourth time period, cells A, B, C, and E all detect frequency offsets with cell D based on the sensing signal transmitted by cell D. In the fifth time period, cell E transmits a sensing signal, and cells A, B, C, and D all detect frequency offsets with cell E based on the sensing signal transmitted by cell E in the fifth time period. That is, through the above five time periods, five cells can be polled and detected.

[0125] For example, in the second implementation, the number of cells transmitting sensing signals in each of the M time periods can be multiple.

[0126] For example, suppose there are 6 communities: community A, community B, community C, community D, community E, and community F, i.e., N equals 6. Then, as shown in Table 2, M equals 3, which indicates:

[0127] Cells A and B transmit sensing signals in the first time period, while cells C, D, E, and F only receive sensing signals in the first time period. Cells C and D transmit sensing signals in the second time period, while cells A, B, E, and F only receive sensing signals in the second time period. Cells E and F transmit sensing signals in the third time period, while cells A, B, E, and D only receive sensing signals in the third time period.

[0128] That is, instructions:

[0129] Cell A only sends sensing signals during the first time period, and only receives sensing signals during the second and third time periods.

[0130] Cell B only sends sensing signals during the first time period, and only receives sensing signals during the second and third time periods.

[0131] Cell C only sends sensing signals during the second time period, and only receives sensing signals during the first and third time periods.

[0132] Cell D only sends sensing signals during the second time period, and only receives sensing signals during the first and third time periods.

[0133] Cell E only sends sensing signals in the third time period, and only receives sensing signals in the first and second time periods.

[0134] Cell F only sends sensing signals in the third time period, and only receives sensing signals in the first and second time periods.

[0135] Table 2

[0136] First period Second period The third period Community A send take over take over Community B send take over take over Community C take over send take over Community D take over send take over Community E take over take over send Community F take over take over send

[0137] Understandably, in the first time period, cells C, D, E, and F can all detect whether there is a frequency offset between themselves and cells A and B based on the sensing signals transmitted by cells A and B respectively. In the second time period, cells A, B, E, and F can all detect whether there is a frequency offset between themselves and cells A and B based on the sensing signals transmitted by cells A and B respectively. In the third time period, cells A, B, C, and D can all detect whether there is a frequency offset between themselves and cells A and B based on the sensing signals transmitted by cells E and F respectively. That is, through these three time periods, six cells can be polled and detected.

[0138] For example, in the third implementation, the number of cells transmitting sensing signals in some of the M time periods is different from the number of cells transmitting sensing signals in other time periods.

[0139] For example, suppose there are 5 communities: community A, community B, community C, community D, and community E, where N equals 5. Then, as shown in Table 3, M equals 3, which indicates:

[0140] Cells A and B transmit sensing signals in the first time period, while cells C, D, and E only receive sensing signals in the first time period. Cells C and D transmit sensing signals in the second time period, while cells A, B, and E only receive sensing signals in the second time period. Cell E transmits sensing signals in the third time period, while cells A, B, C, and D only receive sensing signals in the third time period. In other words, the instruction is:

[0141] Cell A only sends sensing signals during the first time period, and only receives sensing signals during the second and third time periods.

[0142] Cell B only sends sensing signals during the first time period, and only receives sensing signals during the second and third time periods.

[0143] Cell C only sends sensing signals during the second time period, and only receives sensing signals during the first and third time periods.

[0144] Cell D only sends sensing signals during the second time period, and only receives sensing signals during the first and third time periods.

[0145] Cell E only sends sensing signals in the third time period, and only receives sensing signals in the first and second time periods.

[0146] Table 3

[0147] First period Second period The third period Community A send take over take over Community B send take over take over Community C take over send take over Community D take over send take over Community E take over take over send

[0148] Optionally, the M time periods may also include a first time period. In this first time period, all N cells only receive sensing signals. That is, during the first time period, none of the N cells transmit sensing signals; each cell only receives sensing signals. Because no cell transmits sensing signals during this first time period, it is also called a silent period.

[0149] For example, suppose there are 5 cells: cell A, cell B, cell C, cell D, and cell E, where N equals 5. Then, as shown in Table 4, M can equal 6, and the network management device can indicate:

[0150] Cells A, B, C, D, and E all only receive sensing signals during the first time period.

[0151] Cell A sends sensing signals in two time periods, while Cells B, C, and D only receive sensing signals in the second time period.

[0152] Cell B sends sensing signals in three time periods, while Cells A, C, and D only receive sensing signals in the third time period.

[0153] Cell C receives sensing signals in three time periods, while Cells A, B, and C only receive sensing signals in the third time period.

[0154] Cell D sends sensing signals in four time periods, while cells A, B, and C only receive sensing signals in the fourth time period.

[0155] Understandably, the example given here of one cell sending a sensing signal and the remaining cells receiving the sensing signal during non-quiet periods is merely for illustration and does not constitute a limitation of this application.

[0156] Table 4

[0157]

[0158] Since all N cells only receive sensing signals in the first time period, that is, none of the N cells send sensing signals in the first time period, if the first cell receives a sensing signal in the first time period, it means that the first access network device has received a sensing signal from a cell other than the aforementioned N cells.

[0159] Understandably, when there is a first time period (silent period) in the M time periods, if the first cell receives a sensing signal in the first time period and detects a frequency offset between the cell that sent the sensing signal and the first cell based on the received sensing signal, then the first access network device can report an indication of frequency offset to the network management device. Correspondingly, after receiving the indication, the network management device can determine that there are access network devices in the vicinity that are not included in the above N cells and have a frequency offset with the first cell. Correspondingly, the network management device can determine to expand the number of N cells that need to be detected.

[0160] based on Figure 8 In the provided communication method, the first access network device determines whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the received sensing signal from the second cell, and reports the result of whether there is a frequency offset to the network management device. It is understandable that whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell can also be understood as whether there is a frequency offset between the second cell and the first cell. Since a frequency offset between the second cell and the first cell will affect the accuracy of the first cell's sensing, the technical solution of this application can filter out cells from N cells that have a frequency offset from the first cell, thereby helping to improve the accuracy of the first cell's sensing. For example, when it is determined that there is a frequency offset between the second cell and the first cell, the clock of the second cell can be adjusted so that there is no frequency offset between the second cell and the first cell, thereby improving the accuracy of the first cell's sensing.

[0161] Optionally, before sending the first information to the first access network device, the method may further include: sending a third message to the first access network device, the third message being used to instruct the first cell to initiate a frequency offset detection task; correspondingly, after receiving a fourth message from the first access network device, the network management device then sends the first message to the first access network device, the fourth message being used to instruct confirmation of initiating the frequency offset detection task. Here, the frequency offset detection task refers to detecting cells where there is a frequency offset between the frequency of the transmitted sensing signal and the frequency of the sensing signal transmitted by the first cell. In this application, whether there is a frequency offset between the frequencies of the sensing signals transmitted by the two cells can also be understood as whether there is a frequency offset between the two cells.

[0162] Below is a detailed embodiment. Specifically, the method includes:

[0163] Step 1: The network management device identifies the N cells to be detected and instructs the access network devices to which the N cells belong to start the frequency offset detection task.

[0164] For example, after receiving the fifth message, the network management device instructs the access network devices belonging to the N cells to initiate the frequency offset detection task. The fifth message is used to instruct the initiation of the frequency offset detection task.

[0165] Step 2: The access network devices belonging to the N cells send the fourth information to the network management device. The fourth information is used to indicate and confirm the start of the frequency offset detection task.

[0166] Step 3: The network management device determines the time period for each of the N cells to send and receive sensing signals within the M time periods.

[0167] For example, there are 5 cells: cell A, cell B, cell C, cell D, and cell E. Taking the example that at most one cell can send a signal in a given time period, the timing of the transmission and reception of sensing signals by these 5 cells, as determined by the network management equipment, is shown in Table 1 above.

[0168] Based on the preceding text Figure 8 As described in the embodiments, when a cell transmits sensing signals during a certain period, other cells can detect whether that cell has a frequency offset based on the sensing signals received during that period. For example... Figure 8 As described in the embodiment, when the network management device determines the time period for each cell in N cells to send and receive sensing signals in M ​​time periods, it can ensure that each cell sends a sensing signal at least once in the M time periods, thereby guaranteeing the detection of all cells with frequency offset in the N cells.

[0169] Step 4: The network management device instructs the access network devices of each cell on the time period for sending and receiving sensing signals.

[0170] Step 5: The access network equipment of each cell sends sensing signals during the time period indicated by the network management equipment, and receives sensing signals from other cells during the time period for receiving sensing signals. Based on the sensing results of the received sensing signals, the equipment determines whether there is a frequency offset between the cell that sent the sensing signal and the cell itself, and reports the detection results to the network management equipment.

[0171] For example, consider five cells: cell A, cell B, cell C, cell D, and cell E. Table 4 shows the time periods for each cell to transmit and receive sensing signals across M time periods. Figure 11 As shown: In the first time period, cells A, B, C, D, and E only receive sensing signals. In the second time period, cell A transmits sensing signals while the other cells only receive them. In the third time period, cell B transmits sensing signals while the other cells only receive them. In the fourth time period, cell C transmits sensing signals while the other cells only receive them. In the fifth time period, cell D transmits sensing signals while the other cells only receive them. In the sixth time period, cell E transmits sensing signals while the other cells only receive them.

[0172] Specifically, in step 5, each cell transmits and receives sensing signals according to the timing sequence indicated by the network management equipment in the corresponding time period, in order to sequentially traverse and determine the cells with frequency offset among the N cells. Understandably, if the energy spectrum of the range and velocity corresponding to the signal received in a cell contains multiple consecutive frames of vertical stripes outside the 0-speed interval, it indicates that there is frequency offset interference with the cell that transmitted the sensing signal, and this cell is reported to the network management equipment for recording; conversely, if the energy spectrum of the range and velocity corresponding to the signal received in a cell does not contain vertical stripes outside the 0-speed interval, it indicates that there is no frequency offset interference with the cell that transmitted the sensing signal.

[0173] Understandably, when the M time periods include silent periods, all cells in the N cells only receive sensing signals. If a cell receives a sensing signal and the energy spectrum of distance and velocity obtained based on that sensing signal contains vertical bars for consecutive frames outside the 0-velocity interval, it indicates that unselected surrounding cells are causing frequency offset interference to the aforementioned cells with spliced ​​frequency offsets. In this case, the network management device can further expand the range of cells to be detected; otherwise, it is not necessary to expand the range of cells to be detected.

[0174] Optionally, after detecting all cells with frequency offset among the N cells, the network management device can receive an indication message to stop the detection task. Correspondingly, after receiving the indication message, the network management device instructs the access network devices to which the N cells belong to stop the frequency offset sensing and detection task, and the access network devices to which the N cells belong to stop the frequency offset sensing and detection task.

[0175] The transmission method of the embodiments of this application has been described in detail above. The following will be combined with… Figure 12 and Figure 13 The transmission apparatus provided in the embodiments of this application is described in detail.

[0176] Figure 12 This is a structural schematic diagram of a communication device provided in an embodiment of this application. Specifically, as shown... Figure 12 As shown, the device 1200 includes: a transceiver module 1201 and a processing module 1202.

[0177] For example, in one embodiment, the apparatus 1200 may be applied to an access network device.

[0178] For example, transceiver module 1201 is used to receive first information, which indicates the time period during which a first cell transmits sensing signals and the time period during which it receives sensing signals within M time periods. The first cell belongs to a first access network device and is included in N cells. Transceiver module 1202 is also used to: transmit sensing signals during the time period during which sensing signals are transmitted, and receive sensing signals from a second cell during the time period during which sensing signals are received and transmit second information based on the received sensing signals from the second cell. The second information indicates whether there is a frequency offset between the frequency of the sensing signals transmitted by the second cell and the frequency of the sensing signals transmitted by the first cell. The second cell is included in the N cells.

[0179] In one possible implementation, the processing module 1202 is used to: perform sensing based on the received sensing signal of the second cell to obtain the energy spectrum of the distance and velocity corresponding to the second cell; the processing module 1202 is also used to: determine whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell based on the energy spectrum of the distance and velocity; the transceiver module 1201 is also used to transmit second information.

[0180] In one possible implementation, the M time periods include the first time period, and all N cells only receive sensing signals during the first time period.

[0181] In one possible implementation, the transceiver module 1201 is further configured to receive third information, which is used to instruct the first cell to start a frequency offset detection task; the transceiver module 1201 is further configured to send fourth information, which is used to instruct confirmation of starting the frequency offset detection task.

[0182] For example, in two embodiments, the device 1200 can be applied to a network management device.

[0183] For example, transceiver module 1201 is used to send first information, which indicates the time period during which the first cell sends and receives sensing signals within M time periods. The first cell belongs to the first access network device and is included in N cells. Transceiver module 1201 is also used to receive second information from the first access network device, which indicates whether there is a frequency offset between the frequency of the sensing signal sent by the second cell and the frequency of the sensing signal sent by the first cell. The second cell is included in N cells.

[0184] In one possible implementation, the M time periods include the first time period, and all N cells only receive sensing signals during the first time period.

[0185] In one possible implementation, the transceiver module 1201 is further configured to send third information to the first access network device, the third information being used to instruct the first cell to start a frequency offset detection task; the transceiver module 1201 is further configured to send first information in response to receiving fourth information from the first access network device, the fourth information being used to instruct confirmation of starting the frequency offset detection task.

[0186] In one possible implementation, the transceiver module 1201 is further configured to: in response to receiving the fifth information, send the third information to the first access network device, wherein the fifth information is used to instruct the initiation of the frequency offset detection task.

[0187] Figure 13 This is a structural schematic diagram of another communication device provided in an embodiment of this application. Figure 13 The apparatus shown can be used to perform the method described in any of the foregoing embodiments.

[0188] like Figure 13 As shown, the device 1300 of this embodiment includes a memory 1301 and a processor 1302. In one implementation, the device 1300 further includes a communication interface 1303 and a bus 1304. The memory 1301, the processor 1302, and the communication interface 1303 are interconnected via the bus 1304.

[0189] The memory 1301 can be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1301 can store programs, and when the program stored in the memory 1301 is executed by the processor 1302, the processor 1302 uses it to execute... Figure 8 The steps of the method shown.

[0190] The processor 1302 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, used to execute relevant programs to implement the embodiments of this application. Figure 8 The method shown.

[0191] The processor 1302 can also be an integrated circuit chip with signal processing capabilities. In the implementation process, the embodiments of this application... Figure 8 Each step of the method can be accomplished by the integrated logic circuitry in the hardware of the processor 1302 or by instructions in the form of software.

[0192] The processor 1302 described above can also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or a conventional processor, etc.

[0193] The steps of the method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 1301. Processor 1302 reads information from memory 1301 and, in conjunction with its hardware, completes the functions required by the units included in the device of this application. For example, it can execute... Figure 8 The various steps / functions of the illustrated embodiment.

[0194] The communication interface 1303 can use, but is not limited to, transceivers to enable communication between the device 1300 and other devices or communication networks.

[0195] Bus 1304 may include a pathway for transmitting information between various components of device 1300 (e.g., memory 1301, processor 1302, communication interface 1303).

[0196] It should be understood that the apparatus 1300 shown in the embodiments of this application can be deployed in an access network device.

[0197] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be a usable medium accessible to a computer or a data storage device such as a server or data center containing one or more sets of usable media. The usable medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0198] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0199] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple 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 multiple.

[0200] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not limit the implementation process of the embodiments of this application.

[0201] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0202] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0203] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0204] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0205] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0206] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

Claims

1. A communication method, characterized in that, Applied to first access network equipment, including: Receive first information, which is used to indicate the time period during which the first cell transmits sensing signals and the time period during which it receives sensing signals within M time periods. The first cell belongs to the first access network device and is included in N cells. The system transmits a sensing signal during the period of transmitting a sensing signal, and receives a sensing signal from a second cell during the period of receiving a sensing signal and transmits second information based on the received sensing signal from the second cell. The second information is used to indicate whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell. The second cell is included in the N cells.

2. The method according to claim 1, characterized in that, The step of sending second information based on the received sensing signal from the second cell includes: Based on the received sensing signal from the second cell, the energy spectrum of the distance and velocity corresponding to the second cell is obtained; Based on the energy spectrum of the distance and velocity, determine whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell; Send the second message.

3. The method according to claim 1 or 2, characterized in that, The M time periods include a first time period, during which all N cells only receive sensing signals.

4. The method according to any one of claims 1 to 3, characterized in that, Before receiving the first information, the method further includes: Receive third information, the third information being used to instruct the first cell to initiate a frequency offset detection task; A fourth message is sent, which is used to indicate confirmation of starting the frequency offset detection task.

5. A communication method, characterized in that, Applied to network management devices, including: Send first information, which is used to indicate the time period for the first cell to send sensing signals and the time period for receiving sensing signals within M time periods. The first cell belongs to the first access network device and is included in N cells. The system receives second information from the first access network device. The second information is used to indicate whether there is a frequency offset between the frequency of the sensing signal transmitted by the second cell and the frequency of the sensing signal transmitted by the first cell. The second cell is included in the N cells.

6. The method according to claim 5, characterized in that, The M time periods include a first time period, during which all N cells only receive sensing signals.

7. The method according to claim 5 or 6, characterized in that, Before sending the first information, the method further includes: Send a third message to the first access network device, the third message being used to instruct the first cell to start a frequency offset detection task; The sending of the first information includes: In response to receiving a fourth message from the first access network device, the first message is sent, wherein the fourth message is used to indicate confirmation of starting the frequency offset detection task.

8. The method according to claim 7, characterized in that, The step of sending the third information to the first access network device includes: In response to receiving the fifth information, a third information is sent to the first access network device, wherein the fifth information is used to instruct the initiation of a frequency offset detection task.

9. A communication device, characterized in that, Includes a module for performing the method as described in any one of claims 1 to 4.

10. A communication device, characterized in that, Includes a module for performing the method as described in any one of claims 5 to 8.

11. A communication system, characterized in that, It includes the communication device as described in claim 9 and the communication device as described in claim 10.

12. A communication device, characterized in that, include: processor, The processor is configured to cause the communication device to implement the method as described in any one of claims 1 to 4 by executing a computer program and / or by logic circuitry.

13. A communication device, characterized in that, include: processor, The processor is configured to cause the communication device to implement the method as described in any one of claims 5 to 8 by executing a computer program and / or by logic circuitry.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a program or instructions that, when executed on a computer, cause the computer to perform the method as described in any one of claims 1 to 8.

15. A computer program product, characterized in that, The computer program product includes computer program code that, when run on a computer, causes the computer to implement the method as described in any one of claims 1 to 8.

16. A chip, characterized in that, It includes at least one processor and a communication interface, the communication interface and at least one processor being interconnected via a line, the at least one processor being used to run computer programs or instructions to perform the communication method as described in any one of claims 1 to 8.

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