Signal transmission method and related apparatus

Abstract

Provided are a signal transmission method and a related apparatus. The method comprises: sending a detection signal, the detection signal being used for detecting a terminal having an access requirement; receiving a request message in a first beam direction and / or determining that there is a terminal handed over to a first beam direction, wherein the request message is used for requesting to schedule an SSB; and sending the SSB in the first beam direction. In this way, for an area without an access requirement, it is unnecessary to send an SSB and an SIB corresponding to the SSB, thereby conserving resources and reducing resource waste.

Description

Signal transmission method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 4, 2024, with application number 202410166115.1 and application name “A Signal Transmission Method and Related Devices”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] Traditional terrestrial communication networks have limited coverage. For example, they may not be able to provide terrestrial communication services in areas where base stations cannot be deployed, such as oceans, deserts, and forests. Non-terrestrial networks (NTNs) offer wider coverage, and satellite base stations are less susceptible to natural disasters, improving the reliability of communication systems.

[0004] The synchronization signal / physical broadcast channel block (SS / PBCH) (also referred to as the synchronization signal block (SSB)) includes the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the physical broadcast channel (PBCH). The PBCH transmits the master information block (MIB), which carries scheduling information for system information block (SIB) 1. SIB 1 can carry scheduling information for other types of SIBs.

[0005] Currently, in NTN, network equipment sends SSB and SIB corresponding to SSB in each beam direction for terminal access. However, in general, the areas corresponding to some beams do not have access requirements, which easily leads to resource waste. Summary of the Invention

[0006] The present application provides a signal transmission method and related devices to reduce the waste of resources.

[0007] In the first aspect, the present application provides a signal transmission method, which can be executed by a communication device. The communication device can be a network device, or a component configured in the network device (such as a chip, chip system, etc.), or it can also be a logic module or software that can realize all or part of the functions of the network device. The present application does not limit this.

[0008] The method includes: sending a detection signal, which is used to detect terminals with access requirements; receiving a request message in a first beam direction and / or determining that there is a terminal switching to the first beam direction, the request message is used to request scheduling of SSB; and sending SSB in the above-mentioned first beam direction.

[0009] In the present application, the network device determines that there is a terminal switching to the first beam direction, indicating that there is an access demand in the first beam direction. In other words, the terminal in the first beam direction has a need to access the network. The terminal may, for example, be switched from the second beam direction to the first beam direction, and the terminal may be in a connected state in the second beam direction. After the terminal switches from the second beam direction to the first beam direction, it may be necessary to re-access the network; or it may not be necessary to disconnect the network and re-access. This application does not limit this. For example, the network device may determine that the terminal switches to the first beam direction based on the moving direction of the terminal, and continue to provide services to the terminal in the first beam direction. The terminal does not need to disconnect the network and re-access. For another example, after the terminal switches from the second beam direction to the first beam direction, it needs to re-access the network, specifically including the terminal sending a request message to request the network device to schedule SSB and receive SSB to access the network.

[0010] In the present application, the above-mentioned first beam direction can be understood as the direction in which the network device sends the beam. If the network device receives a request message in the above-mentioned direction and / or determines that a terminal has switched to the above-mentioned direction, it means that the terminal in the above-mentioned direction has an access demand, and the network device can send SSB based on the transmission beam in the above-mentioned direction.

[0011] In the above technical solution, the network device first sends a detection signal to collect access requirements, that is, to determine the beam direction of the terminal with the need to access the network, and then sends an SSB in the above beam direction for the terminal to access. In this way, for areas without access requirements, there is no need to send SSB and the SIB corresponding to the SSB, which can save resources and reduce resource waste. In addition, for areas without access requirements, since the detection signal is sent, it is only used to detect terminals with access requirements. Only when the terminal's request message is received and / or it is determined that there is a terminal switching to the first beam direction, will the SSB for terminal access be sent. Compared with sending the detection signal and directly sending the SSB in areas without access requirements, the power consumption of the network device will also be relatively reduced.

[0012] In combination with the first aspect, in some possible implementations of the first aspect, the sending of the detection signal includes: periodically sending the detection signal in multiple beam directions.

[0013] The network device may periodically send a detection signal in multiple beam directions to detect which terminal(s) in which beam directions have access requirements.

[0014] In combination with the first aspect, in some possible implementations of the first aspect, the sending periods of the detection signals corresponding to at least two areas are different, and the above-mentioned at least two areas are at least two of the multiple areas covered by the above-mentioned multiple beam directions, and the above-mentioned sending period is the time interval between sending the detection signal twice in the same beam direction.

[0015] The sending period of the detection signal corresponding to at least two areas in the multiple areas covered by the multiple beam directions is different. For example, the sending period of the detection signal corresponding to each area in the multiple areas covered by the multiple beam directions is different.

[0016] The first beam direction and the second beam direction may be any two of the multiple beam directions, which is not limited in this application.

[0017] One possible design is that the above-mentioned multiple areas can be divided according to access needs. For example, the area with greater access demand has a shorter transmission period of the corresponding detection signal, and the area with smaller access demand has a longer transmission period of the corresponding detection signal. In other words, for the area with smaller access demand, the time interval between two transmissions of the detection signal by the network device in the same beam direction is longer. This is conducive to saving resources, reducing resource waste, and improving resource utilization. In the present application, the above-mentioned access demand can be predicted based on population density, for example, the greater the population density of the area, the greater its potential access demand; the smaller the population density of the area, the smaller its potential access demand.

[0018] In conjunction with the first aspect, in certain possible implementations of the first aspect, the sounding signals sent in the above-mentioned multiple beam directions are sounding signals within a scanning period, or in other words, the network device sends a sounding signal once using the above-mentioned multiple beam directions respectively as a scanning period, and the network device may periodically send sounding signals in the above-mentioned multiple beam directions according to the sending period. Exemplarily, the total number of beam directions provided by the network device is X, of which the number of beam directions used for sending SSB is Y, and the remaining beam directions are used to send sounding signals. The residence time of the sounding signal in a beam direction is T, then the scanning period of the sounding signal = (XY)*T.

[0019] On the second aspect, the present application provides a signal transmission method, which can be executed by a communication device. The communication device can be a terminal, or a component configured in the terminal (such as a chip, chip system, etc.), or it can also be a logic module or software that can realize all or part of the terminal functions. The present application does not limit this.

[0020] The method includes: receiving a detection signal, which is used to detect a terminal with access requirements; sending a request message in a first beam direction and / or switching to the first beam direction, which request message is used to request scheduling of SSB; and receiving SSB in the above-mentioned first beam direction.

[0021] In the present application, the terminal switches to the first beam direction, indicating that there is an access demand in the first beam direction. In other words, the terminal has a need to access the network in the first beam direction. The terminal may, for example, switch from the second beam direction to the first beam direction, and the terminal may be in a connected state in the second beam direction. After the terminal switches from the second beam direction to the first beam direction, it may be necessary to re-access the network; or it may not be necessary to disconnect from the network and re-access. This application does not limit this. For example, the network device may determine that the terminal switches to the first beam direction based on the moving direction of the terminal, and continue to provide services to the terminal in the first beam direction. The terminal does not need to disconnect from the network and re-access. For another example, after the terminal switches from the second beam direction to the first beam direction, it needs to re-access the network, specifically including the terminal sending a request message to request the network device to schedule SSB and receive SSB to access the network.

[0022] In the present application, the above-mentioned first beam direction can be understood as the direction in which the network device sends the beam. If the terminal sends a request message in the above-mentioned direction, and / or if the terminal switches to the above-mentioned direction, it means that the terminal in the above-mentioned direction has an access demand, and the network device can send SSB based on the transmission beam in the above-mentioned direction. Correspondingly, the terminal receives SSB based on the reception beam in the above-mentioned direction. The above-mentioned terminal sends a request message in the first beam direction, which can be understood as the terminal sending a request message based on the transmission beam in the above-mentioned direction, and the terminal receives SSB in the above-mentioned first beam direction, which can be understood as the terminal receiving SSB based on the reception beam in the above-mentioned direction.

[0023] In the above technical solution, the terminal receives the sounding signal. If the terminal has an access requirement, it can send a request message in the first beam direction (the terminal can be located in the first beam direction), and / or, if the terminal switches to the first beam direction, it is assumed that the terminal has an access requirement in the first beam direction, and then the terminal can receive the SSB scheduled by the network device for terminal access. In this way, for areas without access requirements, the network device does not need to send the SSB and the SIB corresponding to the SSB, which can save resources and reduce resource waste.

[0024] In combination with the second aspect, in some possible implementations of the second aspect, the sending periods of the detection signals corresponding to at least two areas are different, and the at least two areas are at least two of the multiple areas covered by multiple beam directions. The sending period is the time interval between sending the detection signal twice in the same beam direction, and the above-mentioned multiple beam directions are the beam directions for providing services by the network device.

[0025] The sending period of the detection signal corresponding to at least two areas in the multiple areas covered by the multiple beam directions is different. For example, the sending period of the detection signal corresponding to each area in the multiple areas covered by the multiple beam directions is different.

[0026] One possible design is that the above-mentioned multiple areas can be divided according to access needs. For example, the area with greater access demand has a shorter transmission period of the corresponding detection signal, and the area with smaller access demand has a longer transmission period of the corresponding detection signal. In other words, for the area with smaller access demand, the time interval between two transmissions of the detection signal by the network device in the same beam direction is longer. This is conducive to saving resources, reducing resource waste, and improving resource utilization. In the present application, the above-mentioned access demand can be predicted based on population density, for example, the greater the population density of the area, the greater its potential access demand; the smaller the population density of the area, the smaller its potential access demand.

[0027] In combination with the first aspect and the second aspect, in some possible implementations, the above-mentioned sounding signal includes at least one of the PSS or the SSS, and first information, and the first information is used to determine the timing advance (TA).

[0028] One possible design is that the above-mentioned detection signal includes PSS and the first information. Compared with SSB, the detection signal does not need to carry SSS and MIB transmitted on PBCH.

[0029] Another possible design is that the above-mentioned detection signal includes SSS and the first information. Compared with SSB, the detection signal does not need to carry the MIB transmitted on PSS and PBCH.

[0030] Another possible design is that the above-mentioned detection signal includes PSS, SSS and the first information. Compared with SSB, the detection signal does not need to carry the MIB transmitted on PBCH.

[0031] It can be seen that the design of the above-mentioned detection signal carries relatively less content compared with SSB, simplifies the design of SSB, and is conducive to reducing signaling overhead and saving resources.

[0032] In combination with the first aspect and the second aspect, in some possible implementations, the first information includes a common timing advance and / or a satellite position.

[0033] In combination with the first aspect and the second aspect, in some possible implementations, the above-mentioned detection signal includes PSS and first information, the time domain resources occupied by the first information are located after the PSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS.

[0034] In combination with the first aspect and the second aspect, in some possible implementations, the above-mentioned detection signal includes SSS and first information, the time domain resources occupied by the first information are continuous, and the starting position of the time domain resources occupied by the first information is located before the time domain resources occupied by SSS, and the ending position of the time domain resources occupied by the first information is located after the time domain resources occupied by SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by SSS.

[0035] In combination with the first aspect and the second aspect, in some possible implementations, the above-mentioned detection signal includes PSS, SSS and first information, the starting position of the time domain resources occupied by the first information is located after the PSS and before the SSS, the ending position of the time domain resources occupied by the first information is located after the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS or SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS or SSS.

[0036] In combination with the first aspect and the second aspect, in some possible implementations, the starting position of the above-mentioned detection signal is the first symbol in a subframe or time slot.

[0037] That is to say, the detection signal is transmitted starting from the first symbol of the subframe or time slot, without reserving some symbols, which is beneficial to saving time domain resources and reducing the waste of time domain resources.

[0038] In a third aspect, the present application provides a communications device that can implement the method described in the first aspect and any possible implementation of the first aspect, or the method described in the second aspect and any possible implementation of the second aspect. The device includes corresponding modules for executing the above methods. The modules included in the device can be implemented in software and / or hardware.

[0039] In a fourth aspect, the present application provides a communication device comprising a processor, which can be used to execute a computer program in a memory to implement the method described in the first aspect and any possible implementation of the first aspect, or to implement the method described in the second aspect and any possible implementation of the second aspect.

[0040] Optionally, the device further includes a communication interface, and the processor is coupled to the communication interface. The communication interface is configured to receive signals from other communication devices outside the device and transmit them to the processor, or to transmit signals from the processor to other communication devices outside the device. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, pin, or other type of communication interface.

[0041] Optionally, the apparatus further comprises a memory, the processor being coupled to the memory. The memory is configured to store program instructions and data. The memory is coupled to the processor, and when the processor executes instructions stored in the memory, the methods described in the above aspects can be implemented.

[0042] In a fifth aspect, the present application provides a computer-readable storage medium, which stores a computer program or instructions. When the computer program or instructions are executed, it implements the method described in the first aspect and any possible implementation of the first aspect, or implements the method described in the second aspect and any possible implementation of the second aspect.

[0043] In a sixth aspect, the present application provides a computer program product comprising instructions, which, when executed, implement the method described in the first aspect and any possible implementation of the first aspect, or implement the method described in the second aspect and any possible implementation of the second aspect.

[0044] In the seventh aspect, the present application provides a chip system, which includes at least one processor for supporting the implementation of the functions involved in the first aspect and any possible implementation of the first aspect, or for supporting the implementation of the functions involved in the second aspect and any possible implementation of the second aspect, for example, receiving or processing the data involved in the above method, etc.

[0045] In one possible design, the chip system further includes a memory, which is used to store program instructions and data, and the memory is located inside or outside the processor.

[0046] In one possible design, the chip system further includes an interface circuit and / or a power supply circuit, where the interface circuit is used to transmit data and the power supply circuit is used to supply power to the chip system.

[0047] The chip system can be composed of chips, or can include chips and other discrete devices.

[0048] In an eighth aspect, the present application provides a communication system comprising a terminal and a network device, wherein the network device is used to implement the method described in the first aspect and any possible implementation of the first aspect, and the terminal is used to implement the method described in the second aspect and any possible implementation of the second aspect.

[0049] It should be understood that the third to eighth aspects of the present application correspond to the technical solutions of the first and second aspects of the present application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] FIG1 is a schematic diagram of the format of time-frequency resources for transmitting SSB provided in an embodiment of the present application;

[0051] FIG2 is a schematic diagram of a scanning period and a sending period of SSB provided in an embodiment of the present application;

[0052] FIG3 is a schematic diagram of the architecture of a communication system applicable to the signal transmission method provided in this application;

[0053] FIG4 is a schematic flow chart of a signal transmission method provided in an embodiment of the present application;

[0054] FIG5 is a schematic flow chart of another signal transmission method provided in an embodiment of the present application;

[0055] FIG6 is a schematic diagram of a detection signal provided in an embodiment of the present application;

[0056] FIG7 is another schematic diagram of a detection signal provided in an embodiment of the present application;

[0057] FIG8 is another schematic diagram of a detection signal provided in an embodiment of the present application;

[0058] FIG9 is a schematic diagram of the detection signal transmission periods corresponding to different areas provided in an embodiment of the present application;

[0059] FIG10 is a schematic diagram of a distributed cell provided in an embodiment of the present application;

[0060] FIG11 is a schematic block diagram of a communication device provided in an embodiment of the present application;

[0061] FIG12 is another schematic block diagram of a communication device provided in an embodiment of the present application;

[0062] FIG13 is another schematic diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] The technical solution in this application will be described below with reference to the accompanying drawings.

[0064] To facilitate understanding of the technical solution provided by this application, the following points are first explained:

[0065] First, in this application, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a device, system, product or apparatus comprising a series of modules, modules or units is not necessarily limited to those modules, modules or units explicitly listed, but may include other modules, modules or units that are not explicitly listed or are inherent to these devices, systems, products or apparatuses.

[0066] Second, in this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship, but it does not exclude the situation where it indicates that the previous and next associated objects are in an "and" relationship. The specific meaning can be understood in conjunction with the context. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, c can be single or multiple.

[0067] Third, in this application, "sending" and "receiving" indicate the direction of signal transmission. For example, "sending information to a terminal" can be understood as the destination end of the information being the terminal, which can include direct sending through the air interface, and also includes indirect sending through the air interface by other units or modules. "Receiving information from a network device" can be understood as the source end of the information being the network device, which can include direct receiving from the network device through the air interface, and also includes indirect receiving from the network device through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface.

[0068] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal; or it can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0069] Fourth, in this application, "when", "if" and "if" all mean that the device will take corresponding actions under certain objective circumstances, which does not limit the time, nor does it require that the device must perform judgment actions when it is implemented, nor does it mean that there are other limitations.

[0070] Fifth, in this application, words such as "example," "exemplarily," "for example," or "such as" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "example," "exemplarily," "for example," or "such as" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "example," "exemplarily," "for example," or "such as" is intended to present the relevant concepts in a concrete manner.

[0071] To facilitate understanding of the method provided by this application, SSB will be explained in detail below.

[0072] The SSB includes the PSS, SSS, and PBCH. The PBCH carries the MIB, which carries scheduling information for SIB 1. SIB 1 can also carry scheduling information for other types of SIBs. The time-frequency resources used to transmit the SSB are described in detail below, in conjunction with Figure 1.

[0073] FIG1 is a schematic diagram of a format of time-frequency resources for transmitting SSB provided in an embodiment of the present application.

[0074] As shown in Figure 1, the time domain resources used to transmit SSB are 4 orthogonal frequency division multiplexing (OFDM) symbols (in this application, OFDM symbols can be simply referred to as symbols), among which the first OFDM symbol is used to carry PSS, and PSS occupies 127 subcarriers in the frequency domain; the second and fourth OFDM symbols are used to carry PBCH signals, and PBCH signals occupy 240 subcarriers in the frequency domain; the third OFDM symbol is used to carry SSS (SSS occupies 127 subcarriers in the frequency domain) and part of the PBCH signal (the PBCH signals at both ends each occupy 48 subcarriers in the frequency domain).

[0075] It should be understood that the format of the time-frequency resources for transmitting SSB shown in Figure 1 is only an example and should not constitute any limitation to this application. For example, the number of subcarriers occupied by SSB can be more or less, and this application does not limit this.

[0076] The scanning period and sending period of SSB will be described in detail below with reference to FIG. 2 .

[0077] FIG2 is a schematic diagram of the scanning period and sending period of SSB provided in an embodiment of the present application.

[0078] The SSB transmission period refers to the time interval between two SSB transmissions by a network device in the same beam direction. As shown in Figure 2, during the initial access process, the SSB transmission period can be 20 milliseconds (ms) (the figure shows four transmission periods). That is, the time interval between two SSB transmissions by a network device in the same beam direction is 20 ms.

[0079] The scanning period of SSB refers to the duration of time that the network device transmits an SSB in multiple beam directions (the multiple beam directions may be beam directions configured by the network device for transmitting SSB). For example, as shown in FIG2 , the network device may transmit SSB in four beam directions (such as beam direction 1, beam direction 2, beam direction 3, and beam direction 4). The SSBs transmitted in the four beam directions are identified, for example, by SSB#0 to SSB#3. The time length for the network device to transmit an SSB in each of the four beam directions is 5 ms, that is, the scanning period of SSB is 5 ms.

[0080] In this application, MIB is transmitted on the PBCH in the SSB, and MIB is used to carry scheduling information of SIB 1, etc. SIB 1 can carry scheduling information of other types of SIBs. Therefore, it can be considered that SSB and SIB correspond to each other. For example, the terminal can determine the location of the control resource of SIB 1 based on the MIB in the received SSB, and then search for SIB 1 on the corresponding control resource.

[0081] Currently, in NTN, network equipment sends SSBs and the corresponding SIBs in each beam direction for terminal access. The SIBs may include parameters such as the public timing advance, satellite position, cell frequency range, and cell configuration. However, many areas corresponding to beams usually do not have access requirements. Therefore, sending SSBs and the corresponding SIBs in the above areas is likely to cause resource waste.

[0082] To solve the above problems, the present application provides a signal transmission method, in which the network device first sends a detection signal to collect access requirements, that is, determines the beam direction of the terminal that needs to access the network, and then sends SSB in the above beam direction for terminal access. In this way, for areas without access requirements, there is no need to send SSB and the SIB corresponding to SSB, which can save resources and reduce resource waste.

[0083] Before describing in detail the signal transmission method provided by the present application, the communication system to which the present application is applicable is first described in detail below.

[0084] FIG3 is a schematic diagram of the architecture of a communication system applicable to the signal transmission method provided in this application.

[0085] As shown in Figure 3, the signal transmission method provided in this application can be applied to an NTN communication system, which includes a terminal, a satellite, a base station (an example of network equipment), a ground station, and a core network. In Figure 3, the base station is deployed on a satellite as an example. In actual applications, the base station can also be deployed on a high-altitude platform. This application does not limit the deployment location of the base station.

[0086] Terminals access the network through air interfaces (which can be various types of air interfaces, such as 5G air interfaces). Base stations, or parts of base station functions, are deployed on high-altitude platforms or satellites and connected to the ground core network via wireless links. Furthermore, when base stations are deployed on satellites, wireless links exist between satellites to facilitate signaling exchanges and user data transmission between base stations.

[0087] In this application, satellites can be used to forward signals between base stations and terminals.

[0088] Base stations can be used to provide wireless access services, schedule wireless resources to terminals, and provide reliable wireless transmission protocols and data encryption protocols.

[0089] The core network is responsible for services such as user access control, mobility management, session management, user security authentication, and billing. The core network includes multiple functional units, which can be divided into control plane and data plane functional entities. The access and mobility management function (AMF) is responsible for user access management, security authentication, and mobility management. The user plane function (UPF) is responsible for managing user plane data transmission, traffic statistics, and other aspects.

[0090] The ground station can be used to forward signaling and service data between the base station and the core network.

[0091] In this application, the air interface refers to the wireless link between a terminal device and a base station. The Xn interface is the interface between base stations and is primarily used for signaling exchanges such as handovers. The NG interface is the interface between a base station and the core network and is primarily used for exchanging core network non-access stratum (NAS) signaling and user service data.

[0092] It should be understood that the system shown in FIG3 uses two terminals for illustrative purposes only and does not constitute any limitation to the present application. In actual applications, a greater number of terminals may be included. Furthermore, a base station is an example of a network device and does not constitute any limitation to the present application. In actual applications, the network device may also be other types of devices.

[0093] It should also be understood that the present application does not limit the types of network devices and terminals. In the present application, a network device can be any device with wireless transceiver functions. The network device includes, but is not limited to, an evolved node B (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved node B, or home node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission and reception point (TRP), etc. It may also be a gNB or a transmission point (TRP or TP) in a 5G (such as NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc. The network device may also be a wireless controller in a cloud radio access network (CRAN) scenario.

[0094] In this application, a terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals may include, but are not limited to: mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality (VR) devices, augmented reality (AR) devices, mixed reality (MR) devices, extended reality (XR) devices, wireless terminals in industrial control, vehicle-mounted devices, wireless terminals in unmanned driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wearable devices, video players, full-range projectors, etc. This application does not limit the specific form of the terminal.

[0095] The signal transmission method provided by the present application will be described in detail below with reference to the accompanying drawings.

[0096] Figure 4 is a schematic flow chart of a signal transmission method 400 provided in an embodiment of the present application. Figure 4 only describes the method by taking the interaction between a terminal and a network device as an example, and should not constitute any limitation to the present application. The terminal in Figure 4 can also be replaced by a component configured in the terminal (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the terminal. The network device can be replaced by a component configured in the network device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the network device. The above-mentioned network device can be, for example, the base station shown in Figure 3.

[0097] The method 400 shown in Figure 4 includes steps 410 to 430. Each step in the method 400 is described in detail below.

[0098] In step 410, the network device sends a detection signal, which is used to detect terminals that have access requirements. Correspondingly, the terminal receives the detection signal.

[0099] Among them, the above-mentioned detection signal is used to detect terminals with access needs. It can be understood that the above-mentioned detection signal is used to detect which terminals in which beam directions have the need to access the network, or in other words, the above-mentioned detection signal is used to collect access requests in each beam direction, wherein the access request refers to a request to access the network.

[0100] Exemplarily, a network device may transmit sounding signals in multiple beam directions to detect terminals with access requirements. For example, the multiple beam directions may be beam directions configured by the network device for transmitting sounding signals. Accordingly, terminals in the multiple beam directions receive the sounding signals. For example, terminals in a first beam direction receive the sounding signals, where the first beam direction is any one of the multiple beam directions.

[0101] In step 420, the terminal sends a request message in the first beam direction, where the request message is used to request the network device to schedule the SSB. Correspondingly, the network device receives the request message in the first beam direction.

[0102] The first beam direction is any one of a plurality of beam directions, and the plurality of beam directions may be beam directions configured by the network device for transmitting the detection signal.

[0103] In this application, the above-mentioned first beam direction can be understood as the direction in which the network device transmits the beam. If the terminal sends a request message in the above-mentioned direction (or if the network device receives a request message in the above-mentioned direction), it means that the terminal in the above-mentioned direction has an access demand, and the network device can send SSB based on the transmit beam in the above-mentioned direction. Correspondingly, the terminal receives SSB based on the receive beam in the above-mentioned direction. The above-mentioned terminal sends a request message in the first beam direction, which can be understood as the terminal sending a request message based on the transmit beam in the above-mentioned direction.

[0104] The request message is used to request the network device to schedule the SSB so that the terminal can obtain the SIB based on the SSB scheduled by the network device and then access the network based on the SIB. In other words, the request message is used to request access to the network.

[0105] Exemplarily, after receiving the sounding signal, the terminal in the first beam direction may send a request message in the above direction to request the network device to schedule SSB, and accordingly, the network device receives the request message in the first beam direction. It will be understood that the sending of the request message by the terminal in the above-mentioned first beam direction (or the receiving of the request message by the network device in the first beam direction) is only an example and should not constitute any limitation to the embodiments of the present application. After receiving the sounding signal, if the terminal in other beam directions among the above-mentioned multiple beam directions needs to access the network, it may also send a request message to request the network device to schedule SSB.

[0106] It can be understood that for terminals in beam directions that do not have access requirements, there is no need to send a request message. Accordingly, if the network device does not receive a request message in a certain beam direction (such as the third beam direction), the network device can continue to send a sounding signal, and accordingly, the terminal receives the sounding signal. Exemplarily, the network device can send a sounding signal in the above-mentioned third beam direction, and accordingly, the terminal receives the sounding signal in the third beam direction. The network device can send a sounding signal in the above-mentioned third beam direction periodically, that is, send a sounding signal in the third beam direction once every period of time.

[0107] It should be understood that in the present application, the above-mentioned request message is used to request the network device to schedule SSB is only an example and should not constitute any limitation to the present application. It can also be replaced by the above-mentioned request message being used to request the network device to start normal communication with the terminal, for example, requesting the network device to schedule SSB, broadcast messages (such as SIB) random access resources, etc.

[0108] In step 430, the network device transmits the SSB in the first beam direction. Correspondingly, the terminal receives the SSB in the first beam direction.

[0109] Exemplarily, after receiving the above request message in the first beam direction, the network device sends the SSB in the first beam direction. Correspondingly, the terminal receives the SSB from the network device to facilitate access to the network.

[0110] It can be understood that the network device may send the SSB in the first beam direction periodically, for example, the network device sends the SSB according to the SSB sending period.

[0111] Figure 5 is a schematic flow chart of another signal transmission method 500 provided in an embodiment of the present application. Figure 5 only describes the method by taking the interaction between the terminal and the network device as an example, and should not constitute any limitation to the present application. The terminal in Figure 5 can also be replaced by a component configured in the terminal (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the terminal. The network device can be replaced by a component configured in the network device (such as a chip, a chip system, a processor, etc.), or a logic module or software that can implement all or part of the functions of the network device. The above-mentioned network device can be, for example, the base station shown in Figure 3.

[0112] The method 500 shown in Figure 5 includes steps 510 to 530. Each step in the method 500 is described in detail below.

[0113] In step 510, the network device sends a detection signal, which is used to detect terminals that have access requirements. Correspondingly, the terminal receives the detection signal.

[0114] For a detailed description of step 510 , please refer to step 410 , which will not be repeated here.

[0115] In step 520, the network device determines that a terminal switches to the first beam direction. Accordingly, the terminal switches to the first beam direction.

[0116] The first beam direction is any one of a plurality of beam directions. The plurality of beam directions may be beam directions configured by the network device for transmitting the detection signal.

[0117] The above-mentioned first beam direction can be understood as the direction in which the network device sends the beam. If the terminal switches to the first beam direction, it means that there is an access demand for the terminal in the above-mentioned direction. The network device can send SSB based on the sending beam in the above-mentioned direction. Correspondingly, the terminal receives SSB based on the receiving beam in the above-mentioned direction.

[0118] In the present application, the network device determines that a terminal has switched to the first beam direction, indicating that there is an access demand in the first beam direction. In other words, the terminal in the first beam direction has a need to access the network. The terminal may, for example, switch from the second beam direction to the first beam direction. The terminal may be in a connected state in the second beam direction. After the terminal switches from the second beam direction to the first beam direction, it may need to re-access the network; it may also be possible to re-access the network without disconnecting from the network, which is not limited in this application. The second beam direction is any one of the multiple beam directions mentioned above.

[0119] For example, the network device can determine that the terminal switches to the first beam direction based on the terminal's movement direction, and continue to provide services to the terminal in the first beam direction, without the terminal having to disconnect from the network and reconnect. For another example, after the terminal switches from the second beam direction to the first beam direction, it needs to reconnect to the network, specifically including the terminal sending a request message to request the network device to schedule SSB and receiving SSB to access the network.

[0120] Exemplarily, after the network device sends a detection signal, it determines that a terminal has switched to the first beam direction. For example, a terminal switches from the second beam direction to the first beam direction, then it is determined that the above-mentioned terminal has an access demand in the first beam direction, that is, the network device can send SSB in the first beam direction.

[0121] In step 530, the network device transmits the SSB in the first beam direction. Correspondingly, the terminal receives the SSB in the first beam direction.

[0122] Exemplarily, after the network device determines that a terminal has switched to a first beam direction, it sends an SSB in the first beam direction, and accordingly, the terminal receives the SSB from the network device.

[0123] It is understandable that if the network device determines that no terminal switches to the first beam direction, the network device continues to send the detection signal. For example, the network device may periodically send the detection signal in the first beam direction.

[0124] It should be understood that the embodiments shown in Figures 4 and 5 can be used separately or in combination. When the embodiments shown in Figures 4 and 5 are used in combination, in one possible design, after the network device sends a detection signal, if the terminal switches to the first beam direction (or the network device determines that there is a terminal switched to the first beam direction), a request message is sent in the first beam direction (or the network device receives a request message in the first beam direction), then the network device can send SSB in the first beam direction. For example, the terminal switches from the second beam direction to the first beam direction, and the terminal can be in a connected state in the second beam direction. After switching to the first beam direction, the terminal needs to re-access the network. After the terminal switches to the first beam direction, it can send a request message to the network device to request scheduling of SSB. Further, the terminal receives the SSB from the network device, thereby completing the process of accessing the network.

[0125] When the embodiments shown in FIG4 and FIG5 are used in combination, if the terminal does not switch to the first beam direction (or the network device determines that no terminal has switched to the first beam direction), or the terminal does not send a request message in the first beam direction (or the network device does not receive a request message in the first beam direction), the network device continues to send the sounding signal in the first beam direction, and accordingly, the terminal continues to receive the sounding signal in the first beam direction. The network device may send the sounding signal in the first beam direction periodically, that is, send the sounding signal in the first beam direction once every period of time.

[0126] In another possible design, after the network device sends the sounding signal, if the terminal switches to the first beam direction (or the network device determines that the terminal has switched to the first beam direction), the network device may send the SSB in the first beam direction; or, if the terminal sends a request message in the first beam direction (or the network device receives a request message in the first beam direction), the network device may send the SSB in the first beam direction. If the terminal does not switch to the first beam direction (or the network device determines that the terminal has not switched to the first beam direction), and the terminal does not send a request message in the first beam direction (or the network device does not receive a request message in the first beam direction), the network device may continue to send the sounding signal in the first beam direction.

[0127] When the embodiment shown in Figure 5 is used alone, Figure 5 can be applicable to scenarios where the terminal does not need to disconnect from the network and then re-access it after switching beams. For example, the terminal switches from the second beam direction to the first beam direction. The terminal can be in a connected state in the second beam direction. After switching to the first beam direction, the network device can still provide services to the terminal in the first beam direction. The terminal does not need to disconnect from the network and then re-access it. After the network device determines that the terminal has switched to the first beam direction, it can directly send SSB without receiving a request message from the terminal.

[0128] The design of the detection signal mentioned in the embodiments shown in FIG. 4 and FIG. 5 will be described in detail below.

[0129] Optionally, the above-mentioned detection signal includes at least one of PSS or SSS, and first information, and the first information is used to determine TA.

[0130] In one example, the sounding signal includes a PSS, an SSS, and the first information. In another example, the sounding signal includes an SSS and the first information. In yet another example, the sounding signal includes a PSS and the first information.

[0131] The PSS and / or SSS may be used by the terminal to determine a starting position for sending an uplink signal, and the first information may be used by the terminal to determine a TA to ensure synchronization of the uplink signal.

[0132] Optionally, the first information includes a common timing advance and / or a satellite position. In this application, the satellite position may be the satellite's exact position, a reference position relative to a reference object, or a reference position at a distance from the satellite's exact position, which is not limited in this application. Furthermore, the satellite position may be indicated by position coordinates or by ephemeris, which is not limited in this application.

[0133] In the case that the above-mentioned detection signal includes PSS, SSS and the first information, the starting position of the time domain resources occupied by the first information is located after the PSS and before the SSS, the ending position of the time domain resources occupied by the first information is located after the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS or SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS or SSS.

[0134] Regarding the time domain resources occupied by the first information: the time domain resources occupied by the first information are continuous, the starting position of the time domain resources occupied by the first information is located after the PSS and before the SSS, and the ending position is located after the SSS. This application does not limit the size of the time domain resources occupied by the first information. For example, the size of the time domain resources occupied by the first information may be the same as or different from the size of the time domain resources occupied by the PBCH in the SSB (e.g., the size of the time domain resources occupied by the first information is larger than the size of the time domain resources occupied by the PBCH in the SSB).

[0135] Regarding the frequency domain resources occupied by the first information: the center position of the frequency domain resources occupied by the first information may be the same as the center position of the frequency domain resources occupied by the PSS, and the present application does not limit the size of the frequency domain resources occupied by the first information. For example, the size of the frequency domain resources occupied by the first information may be the same as or different from the size of the frequency domain resources occupied by the PSS. For example, when the size of the frequency domain resources occupied by the first information is different from the size of the frequency domain resources occupied by the PSS, the size of the frequency domain resources occupied by the first information may be the same as the size of the frequency domain resources occupied by the PBCH in the SSB, or the size of the frequency domain resources occupied by the first information may be larger than the size of the frequency domain resources occupied by the PBCH in the SSB, or the size of the frequency domain resources occupied by the first information may be smaller than the size of the frequency domain resources occupied by the PBCH in the SSB.

[0136] In the following, several possible designs of the time-frequency resources occupied by the first information when the detection signal includes the PSS, the SSS, and the first information are given in conjunction with FIG6 .

[0137] FIG6 is a schematic diagram of a detection signal provided in an embodiment of the present application.

[0138] a) in FIG6 shows the time-frequency resources occupied by SSB. For a detailed description, please refer to FIG1 and will not be repeated here.

[0139] As shown in b) in Figure 6, the relative position of the time-frequency resources occupied by the first information in the detection signal is the same as the relative position of the time-frequency resources occupied by PBCH in the SSB, and the size of the time-frequency resources occupied by the first information in the detection signal is the same as the size of the time-frequency resources occupied by PBCH in the SSB.

[0140] As shown in c) in Figure 6, the relative position of the time-frequency resources occupied by the first information in the detection signal is the same as the relative position of the time-frequency resources occupied by PBCH in the SSB, and the size of the time domain resources occupied by the first information in the detection signal is larger than the size of the time domain resources occupied by PBCH in the SSB, and the size of the frequency domain resources occupied by the first information in the detection signal is equal to the size of the frequency domain resources occupied by PBCH in the SSB.

[0141] As shown in d) in Figure 6, the relative position of the time-frequency resources occupied by the first information in the detection signal is the same as the relative position of the time-frequency resources occupied by PBCH in the SSB, and the size of the time domain resources occupied by the first information in the detection signal is equal to the size of the time domain resources occupied by PBCH in the SSB, and the size of the frequency domain resources occupied by the first information in the detection signal is greater than the size of the frequency domain resources occupied by PBCH in the SSB.

[0142] As shown in e) in Figure 6, the relative position of the time-frequency resources occupied by the first information in the detection signal is the same as the relative position of the time-frequency resources occupied by PBCH in the SSB, and the size of the time domain resources occupied by the first information in the detection signal is equal to the size of the time domain resources occupied by PBCH in the SSB, and the size of the frequency domain resources occupied by the first information in the detection signal is smaller than the size of the frequency domain resources occupied by PBCH in the SSB.

[0143] As shown in f) in Figure 6, the starting position of the time domain resources occupied by the first information in the detection signal is located after the PSS and before the SSS, the ending position of the time domain resources occupied by the first information is located after the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information is equal to the size of the frequency domain resources occupied by the PSS. In the case where the above-mentioned detection signal includes PSS and the first information, the time domain resources occupied by the first information are located after the PSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS.

[0144] Regarding the time domain resources occupied by the first information: the time domain resources occupied by the first information are located after the PSS. This application does not limit the size of the time domain resources occupied by the first information. For example, the size of the time domain resources occupied by the first information can be the same as the size of the time domain resources occupied by the SSS and PBCH in the SSB, or they can be different, such as the size of the time domain resources occupied by the first information is larger than the size of the time domain resources occupied by the SSS and PBCH in the SSB.

[0145] Regarding the frequency domain resources occupied by the first information: the center position of the frequency domain resources occupied by the first information can be the same as the center position of the frequency domain resources occupied by the PSS, and this application does not limit the size of the frequency domain resources occupied by the first information. For example, the size of the frequency domain resources occupied by the first information can be the same as or different from the size of the frequency domain resources occupied by the PSS. For example, the size of the frequency domain resources occupied by the first information can be larger than the size of the frequency domain resources occupied by the PSS.

[0146] In the following, several possible designs of the time-frequency resources occupied by the first information when the detection signal includes the PSS and the first information are given in conjunction with FIG. 7 .

[0147] FIG7 is another schematic diagram of a detection signal provided in an embodiment of the present application.

[0148] a) in FIG7 shows the time-frequency resources occupied by SSB. For a detailed description, please refer to FIG1 and will not be repeated here.

[0149] As shown in b) in Figure 7, the relative position of the time-frequency resources occupied by the first information in the sounding signal is the same as the relative position of the time-frequency resources occupied by SSS in SSB and PBCH in SSB, and the size of the time-frequency resources occupied by the first information in the sounding signal is the same as the size of the time-frequency resources occupied by SSS in SSB and PBCH in SSB.

[0150] As shown in c) in Figure 7, the relative position of the time-frequency resources occupied by the first information in the sounding signal is the same as the relative position of the time-frequency resources occupied by the SSS in the SSB and the PBCH in the SSB, and the size of the time domain resources occupied by the first information in the sounding signal is larger than the size of the time domain resources occupied by the SSS and the PBCH in the SSB (an example of the size of the time domain resources occupied by the first information in the sounding signal being larger than the size of the time domain resources occupied by the PSS in the sounding signal), and the size of the frequency domain resources occupied by the first information in the sounding signal is equal to the size of the frequency domain resources occupied by the PBCH in the SSB in the SSB (an example of the size of the frequency domain resources occupied by the first information in the sounding signal being larger than the size of the frequency domain resources occupied by the PSS in the sounding signal).

[0151] As shown in d) in Figure 7, the relative position of the time-frequency resources occupied by the first information in the detection signal is the same as the relative position of the time-frequency resources occupied by the SSS in the SSB and the PBCH in the SSB, and the size of the time domain resources occupied by the first information in the detection signal is equal to the size of the time domain resources occupied by the SSS in the SSB and the PBCH in the SSB, and the size of the frequency domain resources occupied by the first information in the detection signal is greater than the size of the frequency domain resources occupied by the SSS in the SSB and the PBCH in the SSB.

[0152] As shown in e) in Figure 7, the time domain resources occupied by the first information are located after the PSS, and the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information in the detection signal is equal to the size of the frequency domain resources occupied by the PSS.

[0153] In the case that the above-mentioned detection signal includes SSS and the first information, the time domain resources occupied by the first information are continuous, and the starting position of the time domain resources occupied by the first information is located before the time domain resources occupied by SSS, and the ending position of the time domain resources occupied by the first information is located after the time domain resources occupied by SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by SSS.

[0154] Regarding the time domain resources occupied by the first information: the time domain resources occupied by the first information are continuous, and the starting position of the time domain resources occupied by the first information is located before the time domain resources occupied by the SSS, and the ending position of the time domain resources occupied by the first information is located after the time domain resources occupied by the SSS. This application does not limit the size of the time domain resources occupied by the first information. For example, the size of the time domain resources occupied by the first information may be the same as or different from the size of the time domain resources occupied by the PSS and PBCH in the SSB, such as the size of the time domain resources occupied by the first information is larger than the size of the time domain resources occupied by the PSS and PBCH in the SSB.

[0155] Regarding the frequency domain resources occupied by the first information: the center position of the frequency domain resources occupied by the first information can be the same as the center position of the frequency domain resources occupied by the SSS, and this application does not limit the size of the frequency domain resources occupied by the first information. For example, the size of the frequency domain resources occupied by the first information can be the same as the size of the frequency domain resources occupied by the SSS, or it can be different. For example, when the size of the frequency domain resources occupied by the first information is different from the size of the frequency domain resources occupied by the SSS, the size of the frequency domain resources occupied by the first information is the same as the size of the frequency domain resources occupied by the PBCH in the SSB, or the size of the frequency domain resources occupied by the first information is larger than the size of the frequency domain resources occupied by the PBCH in the SSB, or the size of the frequency domain resources occupied by the first information is smaller than the size of the frequency domain resources occupied by the PBCH in the SSB.

[0156] In the following, several possible designs of the time-frequency resources occupied by the first information when the detection signal includes the SSS and the first information are given in conjunction with FIG8 .

[0157] FIG8 is another schematic diagram of a detection signal provided in an embodiment of the present application.

[0158] a) in FIG8 shows the time-frequency resources occupied by SSB. For a detailed description, please refer to FIG1 and will not be repeated here.

[0159] As shown in b) in Figure 8, the relative position of the time-frequency resources occupied by the first information in the sounding signal is the same as the relative position of the time-frequency resources occupied by the PSS and PBCH in the SSB, and the size of the time-frequency resources occupied by the first information in the sounding signal is the same as the size of the time-frequency resources occupied by the PSS and PBCH in the SSB.

[0160] As shown in c) in Figure 8, the relative position of the time-frequency resources occupied by the first information in the sounding signal is the same as the relative position of the time-frequency resources occupied by the PSS and PBCH in the SSB, and the size of the time domain resources occupied by the first information in the sounding signal is larger than the size of the time domain resources occupied by the PSS and PBCH in the SSB, and the size of the frequency domain resources occupied by the first information in the sounding signal is equal to the size of the frequency domain resources occupied by the PBCH and PSS in the SSB.

[0161] As shown in d) in Figure 8, the relative position of the time-frequency resources occupied by the first information in the detection signal is the same as the relative position of the time-frequency resources occupied by the PSS and PBCH in the SSB, and the size of the time domain resources occupied by the first information in the detection signal is equal to the size of the time domain resources occupied by the PSS and PBCH in the SSB, and the size of the frequency domain resources occupied by the first information in the detection signal is greater than the size of the frequency domain resources occupied by the PSS and PBCH in the SSB.

[0162] It should be understood that the size of the time-frequency resources occupied by the first information in the detection signal shown in Figures 6, 7, and 8 is only an example and should not constitute any limitation to this application. In actual applications, the network device can adjust the size of the time-frequency resources occupied by the first information in the detection signal based on the size of the first information.

[0163] Optionally, the starting position of the above-mentioned detection signal is the first symbol in the subframe or time slot. In other words, the detection signal is transmitted starting from the first symbol in the subframe or time slot without reserving some symbols.

[0164] The sending period and scanning period of the detection signal mentioned in the embodiments shown in FIG. 4 and FIG. 5 will be described in detail below.

[0165] Optionally, the network device may periodically transmit a sounding signal in multiple beam directions. The sounding signal transmission periods for at least two areas are different, where the at least two areas are at least two of the multiple areas covered by the multiple beam directions, and the transmission period is the time interval between two sounding signal transmissions in the same beam direction.

[0166] A network device may periodically transmit a sounding signal in multiple beam directions, where the sounding signal transmission period for at least two of the multiple areas covered by the multiple beam directions is different. For example, the sounding signal transmission period for each of the multiple areas covered by the multiple beam directions is different.

[0167] One possible implementation is that the multiple areas can be divided according to access demand. For example, the area with greater access demand has a shorter detection signal transmission period, and the area with smaller access demand has a longer detection signal transmission period. In other words, for areas with smaller access demand, the time interval between two detection signal transmissions by the network device in the same beam direction is longer. In the present application, the access demand can be predicted based on population density, for example, the greater the population density, the greater the potential access demand; the smaller the population density, the smaller the potential access demand.

[0168] FIG9 is a schematic diagram of the detection signal sending periods corresponding to different areas provided in an embodiment of the present application.

[0169] As shown in Figure 9, three of the aforementioned multiple areas are used as an example. These three areas are divided based on access requirements. For example, the three areas correspond to different access requirements, and the corresponding detection signal transmission periods for these three areas are transmission period 1, transmission period 2, and transmission period 3, respectively. Transmission period 1, transmission period 2, and transmission period 3 are different. For example, if the access requirement of the white area is greater than the access requirement of the black area, and the access requirement of the striped shaded area, then transmission period 1 is less than transmission period 2, and transmission period 3 is less than transmission period 3.

[0170] Optionally, the detection signals sent in the above-mentioned multiple beam directions are detection signals within a scanning period, or in other words, the network device uses the above-mentioned multiple beam directions to send a detection signal once as a scanning period, and the network device can periodically send detection signals in the above-mentioned multiple beam directions.

[0171] Exemplarily, the total number of beam directions served by the network device is X, of which the number of beam directions used for sending SSBs is Y, and the remaining beam directions are used to send probe signals. The dwell time of the probe signal in one beam direction is T, then the scanning period of the probe signal = (XY) * T. For example, the total number of beam directions served by the network device is 100, of which the number of beam directions used for sending SSBs is 4, and the remaining beam directions (96 beam directions) are used to send probe signals. The dwell time of the probe signal in one beam direction is T, then the scanning period of the probe signal = (100-4)*T = 96*T.

[0172] As mentioned before, for the beam direction determined by access requirements (such as receiving a request message from the terminal in the first beam direction and / or determining that the terminal has switched to the first beam direction), the network device can schedule SSB. In the present application, the areas covered by the beam direction of the scheduled SSB can form a distributed cell even if they are not geographically connected, and the broadcast messages and cell identifiers corresponding to each area in the distributed cell remain consistent.

[0173] FIG10 is a schematic diagram of a distributed cell provided in an embodiment of the present application.

[0174] As shown in Figure 10, the black area is the area covered by the beam direction of the scheduled SSB. It is not geographically connected, but can also form a distributed cell. The cell identifiers corresponding to the above areas are the same, and the broadcast messages are also the same. For example, the SSB and SIB broadcast in the above areas are the same.

[0175] It can be understood that when the terminal moves in the above-mentioned distributed cell, for example, the terminal switches from the second beam direction in the above-mentioned distributed cell to the first beam direction, the terminal can directly receive SSB from the network device, wherein the terminal can be in a connected state in the second beam direction.

[0176] Based on the above technical solution, the network device first sends a detection signal to collect access requirements, that is, to determine the beam direction of the terminal with the need to access the network, and then sends SSB in the above beam direction for the terminal access. In this way, for areas without access requirements, there is no need to send SSB and the SIB corresponding to SSB, which can save resources and reduce resource waste. In addition, for areas without access requirements, since the detection signal is sent, it is only used to detect terminals with access requirements. Only when the terminal's request message is received and / or it is determined that there is a terminal switching to the first beam direction, will the SSB for terminal access be sent. Compared with sending the detection signal and directly sending the SSB in areas without access requirements, the power consumption of the network device will also be relatively reduced.

[0177] The signal transmission method provided by the embodiment of the present application is described in detail above with reference to the accompanying drawings. Below, the device provided by the embodiment of the present application is described in detail with reference to the accompanying drawings.

[0178] It should be understood that the devices shown in Figures 11 to 13 can be used to implement the functions of the terminal or network device in the above-mentioned method embodiments, and therefore can also achieve the beneficial effects possessed by the above-mentioned method embodiments. In the embodiments of the present application, the device can be the terminal in the method embodiment shown in Figures 4 or 5, or it can be a component configured in the terminal (such as a chip, a chip system, a processor, etc.), or it can be a logic module or software that can implement some or all of the functions of the terminal; or, the device can be the network device in the method embodiment shown in Figures 4 or 5, or it can be a component configured in the network device (such as a chip, a chip system, a processor, etc.), or it can be a logic module or software that can implement some or all of the functions of the network device.

[0179] FIG11 is a schematic block diagram of a communication device 1100 provided in an embodiment of the present application.

[0180] As shown in Figure 11, the apparatus 1100 includes a transceiver module 1110 and a processing module 1120. The apparatus 1100 can be used to implement the functions of the terminal or network device in the method embodiment shown in Figure 4 or Figure 5 above.

[0181] When the device 1100 is used to implement the function of the network device in the method embodiment shown in Figure 4, the transceiver module 1110 can be used to send a detection signal, which is used to detect terminals with access requirements; the processing module 1120 can be used to receive a request message in a first beam direction, which is used to request scheduling of SSB; the transceiver module 1110 can also be used to send SSB in the first beam direction.

[0182] Optionally, the transceiver module 1110 is specifically configured to periodically send detection signals in multiple beam directions.

[0183] Optionally, the detection signals corresponding to at least two areas have different sending periods, and the at least two areas are at least two of the multiple areas covered by the multiple beam directions, and the sending period is the time interval between sending the detection signal twice in the same beam direction.

[0184] When the device 1100 is used to implement the function of the terminal in the method embodiment shown in Figure 4, the transceiver module 1110 can be used to receive a detection signal, which is used to detect terminals with access requirements; the processing module 1120 can be used to send a request message in a first beam direction, which is used to request scheduling of SSB; the transceiver module 1110 can also be used to receive SSB in the first beam direction.

[0185] When the device 1100 is used to implement the function of the network device in the method embodiment shown in Figure 5, the transceiver module 1110 can be used to send a detection signal, which is used to detect a terminal with access requirements; the processing module 1120 can be used to determine whether there is a terminal switching to the first beam direction; the transceiver module 1110 can also be used to send SSB in the first beam direction.

[0186] When the device 1100 is used to implement the function of the terminal in the method embodiment shown in Figure 5, the transceiver module 1110 can be used to receive a detection signal, which is used to detect terminals with access requirements; the processing module 1120 can be used to switch to the first beam direction; the transceiver module 1110 can also be used to receive SSB in the first beam direction.

[0187] Optionally, the sending periods of the detection signals corresponding to at least two areas are different, and the at least two areas are at least two of the multiple areas covered by multiple beam directions. The sending period is the time interval between sending the detection signal twice in the same beam direction, and the multiple beam directions are the beam directions for providing services by the network device.

[0188] Optionally, the detection signal includes at least one of PSS or SSS, and first information, where the first information is used to determine TA.

[0189] Optionally, the first information includes a common timing advance and / or a position of a satellite.

[0190] Optionally, the detection signal includes the PSS and the first information, the time domain resources occupied by the first information are located after the PSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS.

[0191] Optionally, the detection signal includes the SSS and the first information, the time domain resources occupied by the first information are continuous, and the starting position of the time domain resources occupied by the first information is located before the time domain resources occupied by the SSS, and the ending position of the time domain resources occupied by the first information is located after the time domain resources occupied by the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the SSS.

[0192] Optionally, the detection signal includes the PSS, SSS and the first information, the starting position of the time domain resources occupied by the first information is located after the PSS and before the SSS, the ending position of the time domain resources occupied by the first information is located after the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS or the SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS or the SSS.

[0193] Optionally, the starting position of the detection signal is the first symbol in a subframe or time slot.

[0194] A more detailed description of each of the above modules can be directly obtained by referring to the relevant descriptions in the method embodiments shown in Figures 4 and 5, and will not be repeated here.

[0195] It should be understood that the division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically as separate modules, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0196] FIG12 is another schematic block diagram of a communication device 1200 provided in an embodiment of the present application.

[0197] The device 1200 may be a chip system, or may be a device configured with a chip system for implementing the method described in the above method embodiment. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0198] As shown in FIG12 , the apparatus 1200 may include a processor 1210 , which may be configured to execute computer programs or instructions in a memory to implement the steps performed by the terminal or the steps performed by the network device in the method embodiment shown in FIG4 or FIG5 .

[0199] Optionally, the apparatus 1200 further includes a communication interface 1220. The communication interface 1220 can be used to communicate with other devices via a transmission medium, thereby enabling the apparatus 1200 to communicate with other devices. The communication interface 1220 can be, for example, a transceiver, an interface, a bus, a circuit, or a device capable of performing transceiver functions. The processor 1210 can utilize the communication interface 1220 to input and output data and implement the methods described in the embodiments corresponding to FIG. 4 or FIG. 5 . Specifically, the apparatus 1200 can be used to implement the functions of a terminal or network device in the aforementioned method embodiments.

[0200] Optionally, the device 1200 further includes at least one memory 1230 for storing program instructions and / or data. The memory 1230 is coupled to the processor 1210. Coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which can be electrical, mechanical, or other forms, and is used for information exchange between the devices, units, or modules. The processor 1210 may operate in conjunction with the memory 1230. The processor 1210 may execute program instructions stored in the memory 1230.

[0201] In the present application, the memory 1230 may be integrated into the processor 1210 , or the processor 1210 and the memory 1230 may be separately established, which is not limited in the present application.

[0202] It should be understood that the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 1210 may operate in conjunction with the memory 1230. The specific connection medium between the above-mentioned processor 1210, communication interface 1220 and memory 1230 is not limited in the embodiments of the present application. In Figure 12, the embodiment of the present application shows that the processor 1210, communication interface 1220 and memory 1230 are connected via a bus 1240. The bus 1240 is represented by a bold line in Figure 12, and the connection methods between other components are only for schematic illustration and are not limiting. The bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bold line is used in Figure 12, but this does not mean that there is only one bus or one type of bus.

[0203] FIG13 is another schematic diagram of a communication device 1300 provided in an embodiment of the present application.

[0204] As shown in Figure 13, the communication device 1300 includes at least one processor 1310. The at least one processor 1310 can be used to execute computer programs or instructions in the memory to implement the steps performed by the terminal or the steps performed by the network device in the embodiment shown in Figure 4 or Figure 5.

[0205] Optionally, the communication device 1300 may further include at least one memory 1320 for storing instructions executed by the processor 1310 or storing input data required by the processor 1310 to execute instructions or storing data generated after the processor 1310 executes instructions. The at least one processor 1310 and the at least one memory 1320 may be provided separately. For example, each memory may be connected to one or more processors so that the connected processors can read information from the memory and store and / or write information in the memory. Alternatively, the at least one processor 1310 and the at least one memory 1320 may be integrated together, for example, one or more memories may be integrated into a processor.

[0206] Optionally, the communication device 1300 further includes an interface circuit 1330 that can be used to transmit data and / or signaling. The at least one processor 1310 and the interface circuit 1330 are coupled to each other. It is understood that the interface circuit 1330 can be a transceiver, input / output circuit, bus, module, pin, or other type of communication interface, wherein the input circuit of the input / output circuit can be used for receiving, and the output interface can be used for sending.

[0207] Optionally, the communication device 1300 further includes a power supply circuit 1340 , which can be used to supply power to the communication device 1300 .

[0208] When the communication device 1300 is used to implement the method shown in FIG4 , the processor 1310 is used to execute the functions of the aforementioned processing module, and the interface circuit 1330 is used to execute the functions of the aforementioned transceiver module. Whether the interface circuit 1330 is used for transmission or reception depends on whether the communication device 1300 is used to perform a transmission action or a reception action in the scheme being implemented. For example, it can be used to execute step 410 of the method embodiment shown in FIG4 .

[0209] It is understood that when the communication device 1200 is a communication device, the interface circuit 1330 may be a transceiver, specifically including a transmitter and a receiver, where the transmitter is used to transmit signals and the receiver is used to receive signals. When the communication device 1300 is a chip used in a communication device, the interface circuit 1330 may be an input / output circuit, a bus, a module, a pin, or other type of communication interface, where the input circuit of the input / output circuit can be used for receiving, and the output interface can be used for transmitting.

[0210] It should be understood that in the communication device 1300 shown in FIG. 13 , the processor 1310 may correspond to the processing module 1120 , and the interface circuit 1330 may correspond to the transceiver module 1110 .

[0211] It should also be understood that the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The embodiments of the present application do not limit the specific connection medium between the at least one processor 1310, at least one memory 1320, interface circuit 1330 and power supply circuit 1340. In Figure 13, the embodiment of the present application shows that the processor 1310, memory 1320, interface circuit 1330 and power supply circuit 1340 are connected via bus 1350. Bus 1350 is represented by a bold line in Figure 13, and the connection methods between other components are only for schematic illustration and are not limiting. The bus can be a PCI bus or EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one bold line is used in Figure 13, but this does not mean that there is only one bus or one type of bus.

[0212] The present application also provides a computer program product, which includes: a computer program (also referred to as code, or instructions). When the computer program is executed, it can implement the steps performed by the terminal or the steps performed by the network device in the method described in the embodiment shown in Figure 4 or Figure 5.

[0213] The present application also provides a computer-readable storage medium storing a computer program (also referred to as code or instructions). When the computer program is executed, the steps performed by the terminal or the steps performed by the network device in the method described in the embodiment shown in FIG. 4 or FIG. 5 can be implemented.

[0214] An embodiment of the present application provides a communication system, which includes the terminal and network device as described above.

[0215] It should be understood that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above-mentioned method embodiment can be completed by hardware integrated logic circuits in the processor or by software instructions. The above-mentioned processor can 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. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above-mentioned method.

[0216] It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0217] The terms "unit", "module", etc. used in this specification can be used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. The terms "unit" and "module" in the embodiments of this application have the same meaning and can be used interchangeably.

[0218] Those skilled in the art will appreciate that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may 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. In the several embodiments provided in this application, it should be understood that the disclosed devices, equipment, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only 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 performed. In addition, the coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or units, and can be electrical, mechanical, or other forms.

[0219] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0220] 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.

[0221] In the above embodiments, the functions of each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer 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 computer-readable storage medium. 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., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0222] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the technology or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0223] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A signal transmission method, characterized in that: include: Sending a detection signal, where the detection signal is used to detect a terminal that has an access request; Receiving a request message in a first beam direction and / or determining that a terminal switches to the first beam direction, wherein the request message is used to request scheduling of a synchronization signal block SSB; The SSB is transmitted in the first beam direction.

2. The method according to claim 1, wherein The detection signal includes at least one of a primary synchronization signal PSS or a secondary synchronization signal SSS, and first information, where the first information is used to determine a timing advance TA.

3. The method according to claim 2, wherein The first information includes a common timing advance and / or a position of a satellite.

4. The method according to claim 2 or 3, wherein: The detection signal includes the PSS and the first information. The time domain resources occupied by the first information are located after the PSS. The center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS.

5. The method according to claim 2 or 3, wherein: The detection signal includes the SSS and the first information, the time domain resources occupied by the first information are continuous, and the starting position of the time domain resources occupied by the first information is located before the time domain resources occupied by the SSS, and the ending position of the time domain resources occupied by the first information is located after the time domain resources occupied by the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the SSS.

6. The method according to claim 2 or 3, wherein: The detection signal includes the PSS, SSS and the first information. The starting position of the time domain resources occupied by the first information is located after the PSS and before the SSS. The ending position of the time domain resources occupied by the first information is located after the SSS. The center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS or the SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS or the SSS.

7. The method according to any one of claims 1 to 6, characterized in that The starting position of the detection signal is the first symbol in a subframe or time slot.

8. The method according to any one of claims 1 to 7, characterized in that The sending of the detection signal comprises: Probing signals are periodically sent in multiple beam directions.

9. The method according to claim 8, wherein The detection signals corresponding to at least two areas have different sending periods, and the at least two areas are at least two of the multiple areas covered by the multiple beam directions. The sending period is the time interval between sending the detection signals twice in the same beam direction.

10. A signal transmission method, characterized in that: include: receiving a detection signal, wherein the detection signal is used to detect a terminal having an access request; Sending a request message in a first beam direction and / or switching to the first beam direction, wherein the request message is used to request scheduling of a synchronization signal block SSB; The SSB is received in the first beam direction.

11. The method according to claim 10, wherein The detection signal includes at least one of a primary synchronization signal PSS or a secondary synchronization signal SSS, and first information, where the first information is used to determine a timing advance TA.

12. The method according to claim 11, wherein The first information includes a common timing advance and / or a position of a satellite.

13. The method according to claim 11 or 12, wherein: The detection signal includes the PSS and the first information. The time domain resources occupied by the first information are located after the PSS. The center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS.

14. The method according to claim 11 or 12, wherein: The detection signal includes the SSS and the first information, the time domain resources occupied by the first information are continuous, and the starting position of the time domain resources occupied by the first information is located before the time domain resources occupied by the SSS, and the ending position of the time domain resources occupied by the first information is located after the time domain resources occupied by the SSS, the center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the SSS.

15. The method according to claim 11 or 12, wherein: The detection signal includes the PSS, SSS and the first information. The starting position of the time domain resources occupied by the first information is located after the PSS and before the SSS. The ending position of the time domain resources occupied by the first information is located after the SSS. The center position of the frequency domain resources occupied by the first information is the same as the center position of the frequency domain resources occupied by the PSS or the SSS, and the size of the frequency domain resources occupied by the first information is greater than or equal to the size of the frequency domain resources occupied by the PSS or the SSS.

16. The method according to any one of claims 10 to 15, characterized in that The starting position of the detection signal is the first symbol in a subframe or time slot.

17. The method according to any one of claims 10 to 16, characterized in that The sending periods of the detection signals corresponding to at least two areas are different, and the at least two areas are at least two of the multiple areas covered by multiple beam directions. The sending period is the time interval between sending the detection signal twice in the same beam direction, and the multiple beam directions are the beam directions provided by the network device.

18. A communication device, characterized in that: The method comprises a module for implementing the method according to any one of claims 1 to 9, or comprises a module for implementing the method according to any one of claims 10 to 17.

19. A communication device, characterized in that: comprising a processor and a memory, wherein The memory is used to store computer programs; The processor is configured to call the computer program so that the apparatus implements the method according to any one of claims 1 to 9, or implements the method according to any one of claims 10 to 17.

20. A computer-readable storage medium, characterized in that The storage medium stores a computer program or instruction. When the computer program or instruction is executed by a computer, the method according to any one of claims 1 to 9 is implemented, or the method according to any one of claims 10 to 17 is implemented.

21. A computer program product, characterized in that The computer program product comprises instructions, and when the instructions are executed by a computer, the method according to any one of claims 1 to 9 is implemented, or the method according to any one of claims 10 to 17 is implemented.

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