Communication method and device and storage medium

Abstract

The embodiment of the invention provides a communication method and device and a storage medium, and relates to the technical field of communication, and the method can determine different connection states of a terminal in a communication scene, carries out the management based on the connection states, and guarantees the communication and perception performances. The method comprises the following steps: determining a connection state of a terminal; the connection state is used for indicating whether the terminal is currently in a process of communicating with the base station and / or is sensed by the base station; and managing the terminal according to the connection state.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a communication method, apparatus, and storage medium. Background Art

[0002] The integrated communication and sensing technology enables traditional communication systems to have both communication and sensing functions simultaneously, which is an important evolution direction of the new generation of communication technologies. In the communication and sensing scenario, in addition to connecting users in the traditional way, the base station has an additional requirement of tracking and sensing targets. At the same time, in order to obtain the gain of integrated communication and sensing, some terminals need to communicate simultaneously and be tracked and sensed by the base station, which requires redefining the connection state of users, and there is no such research at present. Summary of the Invention

[0003] Embodiments of the present disclosure provide a communication method, apparatus, and storage medium, which can determine different connection states of terminals in a communication and sensing scenario and manage them based on the connection states to ensure the performance of communication and sensing.

[0004] On the one hand, a communication method is provided, including: determining the connection state of a terminal; the connection state is used to indicate whether the terminal is currently in the process of communicating with the base station and / or being sensed by the base station;

[0005] Managing the terminal according to the connection state.

[0006] On the other hand, a communication apparatus is provided, including: a determination module and a management module.

[0007] The determination module is configured to determine the connection state of the terminal; the connection state is used to indicate whether the terminal is currently in the process of communicating with the base station and / or being sensed by the base station;

[0008] The management module is configured to manage the terminal according to the connection state.

[0009] On yet another hand, a computer-readable storage medium is provided, on which computer program instructions are stored, and when the computer program instructions are executed by a processor, the communication method described in any of the above embodiments is implemented.

[0010] On yet another hand, a computer program product is provided, which includes computer program instructions, and when the computer program instructions are executed by a processor, the communication method described in any of the above embodiments is implemented.

[0011] An embodiment of the present disclosure provides a communication method. By determining whether the terminal is currently communicating with the base station and whether the terminal can be sensed by the base station, the connection state of the terminal is determined, and then the terminal is managed according to the connection state. In a communication and sensing scenario, a scheduling strategy is selected according to the connection state of the terminal to perform resource allocation, ensuring communication and sensing performance, realizing different degrees of communication and sensing joint applications, and effectively avoiding waste of communication resources or sensing resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To more clearly illustrate the technical solutions in the present disclosure, the accompanying drawings required for some embodiments of the present disclosure will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the accompanying drawings of some embodiments of the present disclosure, and those of ordinary skill in the art can also obtain other accompanying drawings based on these accompanying drawings.

[0013] Figure 1 It is a schematic diagram of the architecture of a communication system provided for some embodiments of the present disclosure;

[0014] Figure 2 It is a schematic flowchart of a communication method provided for some embodiments of the present disclosure;

[0015] Figure 3 It is a schematic flowchart of another communication method provided for some embodiments of the present disclosure;

[0016] Figure 4 It is a schematic flowchart of yet another communication method provided for some embodiments of the present disclosure;

[0017] Figure 5 It is a schematic flowchart of yet another communication method provided for some embodiments of the present disclosure;

[0018] Figure 6 It is a schematic diagram of a connection state switch provided for some embodiments of the present disclosure;

[0019] Figure 7 It is a schematic diagram of another connection state switch provided for some embodiments of the present disclosure;

[0020] Figure 8 It is a schematic diagram of yet another connection state switch provided for some embodiments of the present disclosure;

[0021] Figure 9 It is a schematic diagram of yet another connection state switch provided for some embodiments of the present disclosure;

[0022] Figure 10 It is a schematic diagram of the structure of a communication device provided for some embodiments of the present disclosure;

[0023] Figure 11Schematic diagram of a communication device provided by some embodiments of the present disclosure. Detailed implementation manners

[0024] The technical solutions in the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0025] It should be noted that in the present disclosure, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

[0026] Hereinafter, the terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0027] In the description of the present disclosure, unless otherwise specified, " / " means "or". For example, A / B may represent A or B. The "and / or" herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more.

[0028] The integration of communication and sensing empowers traditional communication systems to simultaneously have communication and sensing functions, which is an important evolution direction of the new generation of communication technologies. The integration of communication and sensing realizes the functions of wireless sensing and wireless communication simultaneously by sharing spectrum and software and hardware resources. The integration of communication and sensing can meet the sensing performance requirements in various scenarios with the help of mobile networks, and at the same time can utilize the sensing function to improve the communication performance. Specifically speaking, on the one hand, the use of mobile communication devices for sensing measurement reduces the sensing hardware cost, and at the same time realizes convenient wide-area sensing with the help of mobile communication networks. On the other hand, through the sensing of the wireless electromagnetic environment, it can assist radio resource management, beam management, etc., and improve the ability of communication services.

[0029] With the advancement of the standardization of cross-sensory perception, there has been a great deal of research on the cross-sensory perception network architecture, perception capability registration, perception capability triggering, and perception information collection in wireless communication networks. However, the above research mainly focuses on the configuration process and processing process of perception signals in wireless communication networks, lacking a unified connection state definition and conversion strategy for the perceived objects and terminals under the new integrated communication and perception framework.

[0030] For example, in scenarios such as the low-altitude economy and vehicle networking, in addition to communicable and perceivable targets (such as communicable drones), there are also non-communicable and perceivable targets (such as vehicles without communication terminals), as well as terminals that can only communicate. Different devices have different communication connection / perception connection requirements. For example, the base station needs to monitor and control vehicles in the vehicle networking scenario, plan the movement trajectory of drones in the low-altitude economy scenario, and at the same time alert drones that trigger the electronic no-fly zone.

[0031] To sum up, how to uniformly define the connection state of terminal devices in the new cross-sensory perception scenarios of the low-altitude economy and vehicle networking, so as to allocate communication and perception resources according to the corresponding scheduling strategies in different connection states, and ensure communication and perception performance, is an urgent problem to be solved at present.

[0032] Based on this, the embodiments of the present disclosure provide a communication method. By determining whether the terminal is currently communicating with the base station and whether the terminal can be perceived by the base station, the connection state of the terminal is determined, and then the terminal is managed according to the connection state. In the cross-sensory perception scenario, the scheduling strategy is selected according to the connection state of the terminal to allocate resources, ensuring communication and perception performance, realizing different degrees of joint application of cross-sensory perception, and effectively avoiding the waste of communication resources or perception resources.

[0033] The present disclosure can be applied to scenarios such as the low-altitude economy and vehicle networking. Among them, in addition to communicable and perceivable targets (such as communicable drones), there are also non-communicable and perceivable targets (such as vehicles without communication terminals), as well as terminals that can only communicate. Different terminals have different communication / perception connection requirements.

[0034] In the low-altitude economy scenario, the base station needs to monitor communicable drones, send drone position information to assist the drone's own positioning, send control instructions, plan paths for the drones and inform them of events, etc. This requires the base station to communicate with the drones and continuously perceive the drone positions. In addition, the base station needs to monitor drones flying illegally, prevent them from entering the electronic no-fly zone, and alert the control center when the electronic no-fly zone is triggered, which requires the base station to continuously perceive the positions of the drones.

[0035] In the Internet of Vehicles scenario, the base station needs to monitor the location of communicative vehicles, send vehicle location information to assist vehicle positioning, directly send vehicle control instructions for roadside assisted driving, and notify vehicles of events, etc. This requires the base station to communicate with the vehicle and continuously sense the vehicle's location. In addition, the base station needs to monitor vehicles that do not have communication functions and alert the control center when triggering events such as reverse driving and traffic violations, which requires the base station to continuously sense the vehicle's location.

[0036] The network architecture of the communication network (including but not limited to 3G, 4G, 5G and future mobile communication networks) in the embodiments of the present disclosure may include a synesthesia signal transmitter (referred to as a synesthesia transmitter, for example, including but not limited to base stations, terminals), a communication receiving terminal (for example, including but not limited to terminals, base stations) and a perception receiving terminal (for example, including but not limited to terminals, base stations). Among them, the function of the synesthesia transmitter is to transmit the synesthesia signal through the wireless air interface according to the configuration requirements. The function of the communication receiving terminal is to receive the communication signal and process it to obtain the communication information. The function of the perception receiving terminal is to receive the synesthesia signal after being scattered by the perception target and perform perception processing to obtain the perception information.

[0037] For example, taking the base station as the transmitter of the interaural signal, Figure 1 FIG. 1 is a schematic diagram showing an architecture of a communication system provided by an embodiment of the present disclosure. Figure 1 As shown, the communication system 10 includes a base station 11, a first type terminal 12, a second type terminal 13 and a third type terminal 14. The first type terminal 12 is a communicable and perceptible terminal, the second type terminal 13 is a perceptible terminal, and the third type terminal 14 is a communicable terminal.

[0038] In some embodiments, the base station 11 is used to provide wireless access services for multiple terminals (the first type of terminals and the third type of terminals mentioned above). Specifically, one base station 11 provides a service coverage area (also referred to as a cell). Terminals entering this area can communicate with the base station 11 through wireless signals to receive the wireless access services provided by the base station 11. There may be overlaps between the service coverage areas of the base stations 11, and terminals in the overlapping areas can receive wireless signals from multiple base stations 11.

[0039] In some embodiments, the base station 11 may send a sensing signal to sense the target, and at the same time, the base station may receive an echo signal of the sensing signal from the target to process the sensing signal to obtain sensing information. Alternatively, the base station may send a sensing signal to sense the target, and the terminal may process the echo signal of the sensing signal from the target to obtain sensing information.

[0040] In some embodiments, the base station 11 may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTEA), or an evolved Node B (eNB or eNodeB), a base station in a 5G network, or a base station in a future communication system, etc. The base station may include various macro base stations, micro base stations, home base stations, remote radio heads, reconfigurable intelligent surfaces (RISs), routers, Wireless Fidelity (WIFI) devices, or various network-side devices such as a primary cell and a secondary cell.

[0041] In some embodiments, the first type of terminal 12 may be a drone equipped with a communication module, or an automotive module equipped with a communication module. The second type of terminal 13 may be a vehicle without a communication module, or a drone without a communication module, etc. The third type of terminal 14 may be a device with wireless transceiver functions, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver functions, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control, or a wireless terminal in remote medical treatment.

[0042] The embodiments of the present disclosure do not limit the application scenarios. A terminal may sometimes also be referred to as a user, a User Equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile device, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE device, etc. The embodiments of the present disclosure do not limit this.

[0043] Figure 2 It is a schematic flowchart of a communication method provided by an embodiment of the present disclosure. Exemplarily, the communication method provided by the present disclosure can be applied to Figure 1 the network architecture shown in Figure 1 and specifically can be applied to the base station in

[0044] As shown in Figure 2As shown, the communication method provided by the present disclosure may specifically include the following steps:

[0045] S201. Determine the connection status of the terminal.

[0046] The connection status is used to indicate whether the terminal is currently in the process of communicating with the base station and / or is sensed by the base station.

[0047] S202. Manage the terminal according to the connection status.

[0048] In the embodiments of the present disclosure, for a certain terminal, the base station can detect whether the terminal is currently communicating with itself and whether the base station can sense the terminal, so as to determine the current connection status of the terminal. Further, according to the connection status of the terminal, the communication resources or sensing resources are reasonably scheduled to manage the terminal according to the connection status. For example, according to the connection status, if it is determined that a certain terminal has no sensing requirement currently, there is no need to send a sensing beam to the terminal for sensing, so as to reduce the resource overhead.

[0049] In some embodiments, the connection status is any one of the following:

[0050] The first connection status, which is used to indicate that the terminal is not currently in the process of communicating with the base station and is not sensed by the base station.

[0051] The second connection status, which is used to indicate that the terminal is currently in the process of communicating with the base station and is not sensed by the base station.

[0052] The third connection status, which is used to indicate that the terminal is currently sensed by the base station and is not in the process of communicating with the base station;

[0053] The fourth connection status, which is used to indicate that the terminal is currently in the process of communicating with the base station and is sensed by the base station.

[0054] In some embodiments, determining the connection status of the terminal in S201 above can be implemented as follows: 1. When the first preset condition is not satisfied and the second preset condition is not satisfied, determine that the terminal is in the first connection status. 2. When the first preset condition is satisfied and the second preset condition is not satisfied, determine that the terminal is in the second connection status. 3. When the first preset condition is not satisfied and the second preset condition is satisfied, determine that the terminal is in the third connection status. 4. When the first preset condition is satisfied and the second preset condition is satisfied, determine that the terminal is in the fourth connection status.

[0055] The first preset condition is that data interaction with the terminal is detected within the first preset duration, and the second preset condition is that the terminal can be sensed within the second preset duration.

[0056] It should be understood that in the first connection state, there is no interaction of sensing signals between the terminal and the base station, nor is there any data interaction (for example, in the state before initial access, the terminal does not have communication functions or has no communication requirements (or loses communication access) and cannot be sensed by the base station). Therefore, this first connection state can also be referred to as a disconnected state or an idle connection state. In the second connection state, there is data interaction between the terminal and the base station, but there is no interaction of sensing signals. Therefore, this second connection state can also be referred to as a communication connection state. In the third connection state, there is interaction of sensing signals between the terminal and the base station, but there is no data interaction. Therefore, this third connection state can also be referred to as a sensing connection state. In the fourth connection state, there is both interaction of sensing signals and data interaction between the terminal and the base station. Therefore, this fourth connection state can also be referred to as a communication and sensing connection state.

[0057] When it is said that the base station can sense the terminal here, it means that within the second preset duration, the power / SNR corresponding to the terminal can be continuously detected on the sensing spectrum and exceeds the set threshold. The sensing spectrum can also be referred to as the range-Doppler spectrum and can include at least one of the following: range spectrum, velocity spectrum, and angle spectrum.

[0058] In some embodiments, the above S202 can be implemented as follows: in response to a trigger condition, the base station manages the terminal according to the connection state; the trigger condition includes at least one of the following: meeting a predefined condition, receiving an operation instruction, and receiving a request from the terminal.

[0059] For example, during communication connection, when the terminal has a communication data requirement, it can send a request to the base station. In response to this request, the base station sends communication data to the terminal according to the connection state of the terminal for management. Or, the base station can actively manage the terminal according to the administrator's instruction. Or, the predefined condition is that within a preset time period, such as late at night, a certain terminal does not require the base station to sense it. Then, within this preset time period, the base station can stop sending sensing signals to the terminal to save the overhead of sensing resources.

[0060] In some embodiments, as Figure 3 shown, the base station also executes the following S301:

[0061] S301. When the terminal is in the fourth connection state, periodically send a second message to the terminal.

[0062] Wherein, the second message is used to indicate that the terminal is currently in the fourth connection state.

[0063] It can be understood that in the fourth connection state (communication and sensing connection state), the base station can periodically send an identifier of the fourth connection state to the terminal, so that the terminal can confirm that it is in the communication and sensing connection state according to the identifier of the fourth connection state and can request communication information and / or sensing information from the base station in the current state.

[0064] In some embodiments, as Figure 4 shown, the base station also performs the following S401 - S402:

[0065] S401. When the terminal is in the fourth connection state, receive a third message sent by the terminal.

[0066] Wherein, the third message is used to request communication information and / or sensing information;

[0067] S402. In response to the third message, send communication information and / or sensing information to the terminal.

[0068] When the terminal is in the fourth connection state, the terminal can request communication information and / or sensing information from the base station. As an example, in the scenario of vehicle navigation, the communication information can be control information for controlling the subsequent moving route of the vehicle. The sensing information can be positioning information for indicating the current location of the vehicle and its historical moving trajectory.

[0069] In some embodiments, as Figure 5 shown, the base station also performs the following S501:

[0070] S501. Send a third message to other base stations within a preset area. The third message is used to indicate the connection state of the terminal.

[0071] It should be understood that passing the connection state of the terminal to adjacent base stations can enable other base stations within the preset area to also manage the terminal according to the connection state of the terminal, thereby improving the overall control of the user access state by the communication network and providing better mobility management and other services for users.

[0072] Next, the switching between different connection states will be described in detail in combination with specific embodiments and the accompanying drawings of the specification.

[0073] Embodiment 1: Switching between the first connection state and the second connection state.

[0074] In some embodiments, when the terminal is in the first connection state, the base station can perform the following steps a1 - step b1 to achieve the switching of the connection state of the terminal:

[0075] Step a1. Send a synchronization signal block (SSB) signal through beam scanning.

[0076] Step b1. When it is detected that the terminal has completed the access process through the SSB signal, switch the connection state of the terminal from the first connection state to the second connection state.

[0077] It should be understood that in combination withFigure 6 This will be described. The base station can perform beam scanning periodically to send SSB signals. If the terminal has a communication requirement (for example, the user configures to turn on the network connection), the terminal completes the communication access process through the received SSB signals. Previously, the terminal was in the first connection state (no connection state). After determining that the terminal has accessed, the base station sets the terminal to the second connection state (communication connection state).

[0078] In some embodiments, when the terminal is in the second connection state, the base station can perform the following step a2 to implement the switching of the connection state of the terminal.

[0079] Step a2: When detecting that the communication connection with the terminal is disconnected, switch the connection state of the terminal from the second connection state to the first connection state.

[0080] It should be understood that this will continue to be described in conjunction with Figure 6 When the terminal is in the second connection state, the base station can determine that the communication connection between the base station and the terminal is disconnected according to the trigger condition, and then switch the connection state of the terminal to the first connection state.

[0081] As an example, the trigger condition mentioned here can be that the terminal actively disconnects the communication connection, such as the user turning off the network connection function of the terminal, or the terminal actively turning off the network connection function for its own power consumption considerations.

[0082] As another example, the trigger condition mentioned here can be that due to the change of the channel environment, the base station loses the communication connection with the terminal, and then configures the terminal to the first connection state. In this case, as Figure 6 shown, the base station can continue to perform the beam scanning in step a1 above to detect whether there is a terminal accessing. If there is a terminal accessing and the base station identifies the original terminal with the lost communication connection according to the identifier of the terminal, it switches to the second connection state. If the terminal does not re-access, it keeps the terminal in the first connection state.

[0083] The following will describe the process of the terminal switching from the first connection state to the second connection state and then to the first connection state in combination with a specific scenario.

[0084] In a communication scenario, there is a base station that transmits communication signals and sensing signals in a time-division manner. The communication signal is an orthogonal frequency division multiplexing (OFDM) signal, and the sensing signal is a frequency modulated continuous wave (FMCW) signal. There is a handheld mobile communication terminal labeled as terminal 1, and terminal 1 is currently in a non-connected state.

[0085] 1. The base station periodically broadcasts SSB signals and FMCW signals in a time-division manner.

[0086] 2. When the terminal 1 enters the communication coverage area of the base station and receives the SSB signal broadcast by the base station, it completes the initial access process of communication through the 4-step random access channel (RACH). If the terminal 1 and the base station continuously send and receive data within T1 = 0.1 s, the base station configures the terminal 1 as the communication connection state.

[0087] 3. The base station senses the terminal 1 through the echo signal of the periodically broadcast FMCW signal.

[0088] 4. If the base station does not detect a sensing target in the range-Doppler spectrum whose power exceeds the set threshold (i.e., does not sense the terminal), the terminal stays in the communication connection state.

[0089] 5. After 1 hour, due to the sudden deterioration of the channel environment, the communication connection of the terminal 1 is lost, and the terminal transfers from the communication connection state to the connectionless state.

[0090] Embodiment 2: Switching between the first connection state and the third connection state.

[0091] In some embodiments, when the terminal is in the first connection state, the base station can perform the following steps a3 - c3 to achieve the switching of the connection state of the terminal.

[0092] Step a3: Send a sensing signal through beam scanning.

[0093] Step b3: Receive the echo signal of the terminal for the sensing signal.

[0094] Step c3: According to the echo signal, if the terminal can be sensed within the second preset duration, switch the connection state of the terminal from the first connection state to the third connection state.

[0095] Combined Figure 7 For illustration, the base station can periodically perform beam scanning within a set area to send sensing signals to sense the terminal. It should be understood that the sensing signal and the above SSB signal can be transmitted in a time-division / frequency-division form or simultaneously in an integrated waveform form to save resource overhead.

[0096] Further, the base station can receive the echo signal of the sensing signal from the terminal. According to the echo signal, if the base station continuously observes a target with power / signal-to-noise ratio exceeding the set threshold within the second preset duration (T2) through the sensing spectrum, and the sensing processing algorithm of the base station identifies it as a new terminal, then the base station configures this terminal to be in the third connection state (sensing connection state). At this time, the sensing mode is the base station's self-transmitting and self-receiving mode. When in the third connection state, the base station can perform sensing and monitoring on the terminal.

[0097] In some embodiments, when the terminal is in the third connection state, the base station can execute the following step a4 to achieve the switching of the connection state of this terminal.

[0098] Step a4: When the terminal is not sensed within the second preset duration, switch the connection state of the terminal from the third connection state to the first connection state.

[0099] Continue to combine Figure 7 for illustration. When the terminal is in the third connection state, the base station can determine that the terminal is not sensed according to the triggering condition, and then switch the connection state of the terminal to the first connection state.

[0100] As an example, the triggering condition mentioned here can be that the base station actively abandons the sensing connection according to the operation of the administrator, that is, the base station stops sending sensing signals to the terminal for sensing. At this time, the base station configures the terminal to be in the first connection state.

[0101] As another example, the triggering condition mentioned here can be that due to the terminal being blocked or the channel environment being poor, the base station cannot sense the terminal, and then the terminal is configured to be in the first connection state. In this case, as Figure 7 shown, the base station can continue to perform the beam scanning of the above steps a3 and b3 (it can perform scanning with a finer-grained beam according to the position of the terminal), and detect that the power / signal-to-noise ratio of this terminal that can be continuously observed on the sensing spectrum exceeds the set threshold within the second preset time. If so, the terminal resumes the sensing connection, and the base station configures the terminal to be in the third connection state (at this time, the sensing mode is the base station's self-transmitting and self-receiving sensing mode). If not, the terminal remains in the first connection state.

[0102] Next, the process of the terminal switching from the first connection state to the third connection state and then to the first connection state will be described in combination with a specific scenario.

[0103] In the vehicle networking scenario, there is a base station with a bandwidth of 200M. It transmits communication signals and sensing signals in a frequency-division manner, where 100M bandwidth is used to transmit communication signals (OFDM signals), and another 100M is used to transmit sensing FMCW signals. The base station has a monitoring requirement for the vehicles in the vehicle networking scenario. A vehicle without communication function, labeled as vehicle 1, has a moving speed of 10m / s.

[0104] 1. The base station broadcasts the SSB signal and the broadcast sensing FMCW signal in a frequency division manner.

[0105] 2. The base station, through the echo signal of the sensing FMCW signal, continuously detects, within T2 = 0.1 s, a sensing target whose power in the sensing spectrum exceeds the set threshold. The base station identifies it as a new terminal through the sensing processing algorithm. If vehicle 1 is sensed, the base station configures vehicle 1 to be in the sensing connection state. At this time, the sensing mode is the base station's self - transmitting and self - receiving mode. The base station transmits a target sensing beam to the location where vehicle 1 is located and monitors vehicle 1 through sensing.

[0106] 3. Since vehicle 1 does not have a communication function and has not completed the communication initial access process, vehicle 1 stays in the sensing connection state.

[0107] 4. The channel environment deteriorates, and the base station does not detect, within T2 = 0.1 s, a sensing target whose power in the range - Doppler spectrum exceeds the set threshold. Vehicle 1 loses the sensing connection and transfers to the unconnected state. The base station transmits a finer - grained beam to the area where vehicle 1 is located for sensing scanning, attempting to sense the location of vehicle 1.

[0108] 5. After the base station's finer - grained beam sensing scanning, it does not detect, within T2 = 0.1 s, a sensing target whose power in the range - Doppler spectrum exceeds the set threshold. Vehicle 1 remains in the unconnected state.

[0109] Embodiment 3: Switching between the third connection state and the fourth connection state.

[0110] In some embodiments, when the terminal is in the third connection state, the base station can perform the following steps a5 - step b5 to achieve the switching of the terminal's connection state.

[0111] Step a5: Send the SSB signal through beam scanning.

[0112] Step b5: When it is detected that the terminal has completed the access process through the SSB signal, switch the connection state of the terminal from the third connection state to the fourth connection state.

[0113] Combined Figure 8 For illustration. When the terminal is in the third connection state, the base station can determine that the terminal is not sensed according to the trigger condition, and then switch the connection state of the terminal to the first connection state. The base station can periodically perform beam scanning to send the SSB signal. If the terminal has a communication requirement (for example, the vehicle needs the base station for assisted driving and actively configures to turn on the network connection), the terminal can complete the communication access process through the received SSB signal. Previously, the terminal was in the third connection state. After determining that the terminal has accessed, the base station sets the terminal to the fourth connection state (the communication and sensing connection state).

[0114] Further, after establishing a communication connection, the terminal can send a communication-sensing connection request to the base station. Based on the sensed position of the terminal, the base station emits a target sensing beam to the terminal and senses the terminal through the echo signal. The base station requires the terminal to periodically transmit sensing measurement signals for the base station to confirm the sensing quality. The sensing mode is the base station's self-transmitting and self-receiving sensing mode.

[0115] In addition, the base station can periodically send an identifier of the communication-sensing connection status to the terminal, so that the terminal can confirm that it is currently in the communication-sensing connection status. And request communication information and / or sensing information from the base station when needed.

[0116] In some embodiments, when the terminal is in the fourth connection state, the base station can perform the following step a6 to implement the switching of the connection state of the terminal.

[0117] Step a6: When detecting that the communication connection with the terminal is disconnected, switch the connection state of the terminal from the fourth connection state to the third connection state.

[0118] Continue to combine Figure 8 For illustration. When the terminal is in the fourth connection state, the base station can determine that the communication connection between the base station and the terminal is disconnected according to the trigger condition, and then switch the connection state of the terminal to the third connection state.

[0119] As an example, the trigger condition can be that the terminal actively disconnects the communication connection, such as the user turning off the network connection function of the terminal, or the terminal actively turning off the network connection function due to its own power consumption considerations.

[0120] As another example, the trigger condition can be that due to the change of the channel environment, the base station loses the communication connection with the terminal, and the terminal is configured to be in the first connection state. In this case, as Figure 8 shown, the base station can continue to perform the beam scanning in the above step a5 to detect whether there is a terminal accessing. If there is a terminal accessing and the base station identifies the original terminal whose communication connection was lost according to the identifier of the terminal, it switches to the fourth connection state. If the terminal does not reconnect, it keeps the terminal in the third connection state.

[0121] The following describes the process of the terminal switching from the third connection state to the fourth connection state and then to the third connection state in combination with a specific scenario.

[0122] Consider a vehicle networking scenario where there is a base station with a bandwidth of 200M. The base station transmits communication signals and sensing signals through frequency division. Among them, 100M bandwidth is used to transmit communication OFDM signals, and the other 100M is used to transmit sensing FMCW signals. There are two vehicles with communication functions, labeled as Vehicle 1 and Vehicle 2, with a driving speed of 15m / s. Vehicle 1 is in the sensing connection state, and Vehicle 2 is in the communication and sensing connection state. The sensing mode is the base station's self-transmission and self-reception mode.

[0123] Vehicle 1 transfers from the sensing connection state to the communication and sensing connection state:

[0124] 1. Vehicle 1 receives the SSB signal broadcast by the base station and completes the communication initial access process. Vehicle 1 and the base station continuously send and receive data within T1 = 0.1s, and the base station senses that Vehicle 1 is continuously within the sensing beam coverage area within T2 = 1s. Vehicle 1 enters the communication and sensing connection state.

[0125] 2. The terminal sends a communication and sensing connection request to the base station. Based on the sensed terminal position, the base station transmits a target sensing beam to the terminal and senses the terminal through the echo signal. The base station requires the terminal to transmit sensing measurement signals every 1s for the base station to confirm the sensing quality, ending the terminal transmission and base station reception mode and transferring to the base station's self-transmission and self-reception sensing mode.

[0126] 3. The base station gives the terminal a communication and sensing connection status identifier and sends it to the terminal every 0.1s.

[0127] 4. After 10s, due to factors such as a drastic change in the channel environment, Vehicle 1 does not send and receive data with the base station within T1 = 0.1s. The terminal transfers from the communication and sensing connection state to the sensing connection state.

[0128] 5. After 10s, Vehicle 1 completes the communication initial access process through the received SSB signal and 4-step RACH. Vehicle 1 and the base station continuously send and receive data within T1 = 0.1s, and Vehicle 1 enters the communication connection state. The base station's communication and sensing terminal identifier recognizes Vehicle 1 as the previously accessed terminal, and Vehicle 1 switches back to the communication and sensing connection state.

[0129] Vehicle 2 transfers from the communication and sensing connection state to the sensing connection state:

[0130] 1. Due to a drastic change in the channel environment, Vehicle 2 does not send and receive data with the base station within T1 = 0.1s.

[0131] 2. Vehicle 2 does not complete the communication initial access process. The terminal transfers from the communication and sensing connection state to the sensing connection state.

[0132] Example 4: Switching between the second connection state and the fourth connection state.

[0133] In some embodiments, when the terminal is in the second connection state, the base station may perform the following steps a7 - c7 to implement the switching of the connection state of the terminal.

[0134] Step a7: Send a first message to the terminal; the first message is used to instruct the terminal to send a sensing measurement signal.

[0135] Step b7: Measure the sensing measurement signal to obtain the channel quality.

[0136] Step c7: When the channel quality is greater than a preset threshold, switch the connection state of the terminal from the second connection state to the fourth connection state.

[0137] Furthermore, the base station may determine the position of the terminal according to the sensing measurement signal, and send a target sensing beam to the terminal based on this position to sense the terminal (i.e., switch the sensing mode from terminal - transmitting and base - station - receiving to base - station - transmitting and base - station - receiving). In addition, the base station may instruct the terminal to periodically send sensing measurement signals so that the base station can confirm the sensing quality.

[0138] It should be noted that in the scenario of multiple terminals, since the time - frequency resources corresponding to the sensing measurement signals sent by different terminals are different, the base station can distinguish different terminals according to the time - frequency resources corresponding to the received sensing measurement signals.

[0139] Combined with Figure 9 For illustration, when the terminal is in the second connection state, the base station may send a communication - sensing connection indication (the above - mentioned first message) to the terminal according to the trigger condition, and require the terminal to send a sensing measurement signal in the specified time - frequency resources. Here, the sensing measurement signal is different from the communication measurement signal, and can be a sensing waveform such as an FMCW waveform or a communication - sensing integrated waveform like an orthogonal time frequency space (OTFS) waveform.

[0140] The base station measures the sensing measurement signal. If the measured channel quality (CQI, SINR and other indicators) is less than the set threshold, the sensing condition is not met. The terminal remains in the second connection state. If the measured channel quality is greater than or equal to the set threshold and the sensing condition is met, the base station uses the sensing measurement signal to sense the position of the terminal and configures the terminal to switch to the fourth connection state. At this time, the sensing mode is the terminal - transmitting and base - station - receiving sensing mode.

[0141] Furthermore, the base station emits a target sensing beam to the terminal based on the sensed terminal position, and senses the terminal through the echo signal. The base station instructs the terminal to periodically emit sensing measurement signals for the base station to confirm the sensing quality, ends the terminal - transmitting and base - station - receiving mode, and transfers to the base - station - transmitting and base - station - receiving sensing mode.

[0142] In addition, after the terminal is in the fourth connection state, the base station can periodically send an identifier of the communication and sensing connection state to the terminal, so as to facilitate the terminal to confirm that it is currently in the communication and sensing connection state and request communication information and / or sensing information from the base station when needed.

[0143] In some embodiments, when the terminal is in the fourth connection state, the base station can perform the following step a8 to implement the switching of the connection state of the terminal.

[0144] Step a8: When the terminal is not sensed within the second preset duration, switch the connection state of the terminal from the fourth connection state to the second connection state.

[0145] Continue to combine Figure 9 For illustration. When the terminal is in the fourth connection state, the base station can determine that the terminal is not sensed according to the trigger condition, and then switch the connection state of the terminal to the second connection state (at this time, the communication connection state may also be about to be lost).

[0146] As an example, the trigger condition can be that the base station actively abandons the sensing connection according to the operation of the administrator, that is, stops sending sensing signals to the terminal for sensing, and at this time, the terminal is configured to be in the second connection state.

[0147] As another example, the trigger condition can be that the terminal actively abandons the sensing connection, that is, the terminal sends a message to the base station indicating abandonment, and then the base station stops sending sensing signals to the terminal for sensing, and at this time, the terminal is configured to be in the second connection state.

[0148] As still another example, the trigger condition can be that the base station cannot sense the terminal due to the terminal being blocked or the channel environment being poor, and then the terminal is configured to be in the second connection state. In this case, as Figure 9 shown, the base station can continue to perform the above steps a7 and b7. The base station sends a communication and sensing connection indication (the above first message) to the terminal, requesting the terminal to send a sensing measurement signal in the specified time-frequency resource. The base station measures the sensing measurement signal. If the measured channel quality (CQI, SINR and other indicators) is less than the set threshold, the sensing condition is not met, and the terminal remains in the second connection state. If the measured channel quality is greater than the set threshold and the sensing condition is met, the base station senses the position of the terminal using the sensing measurement signal and configures the terminal to switch to the fourth connection state. At this time, the sensing mode is the terminal-transmit and base-station-receive mode.

[0149] Furthermore, based on the sensed position of the terminal, the base station emits a target sensing beam to the terminal and senses the terminal through the echo signal. The base station requires the terminal to periodically transmit a sensing measurement signal for the base station to confirm the sensing quality. At this time, the sensing mode transfers from the terminal-transmit and base-station-receive mode to the base-station-transmit and base-station-receive sensing mode.

[0150] The process of the terminal switching from the second connection state to the fourth connection state and then back to the second connection state will be described below in combination with a specific scenario.

[0151] In the low-altitude economy scenario, there is a base station that transmits communication signals and sensing signals in a time-division manner. The communication signal is an OFDM signal, and the sensing signal is an FMCW signal. The base station has monitoring and control requirements for the drones in the scenario. There are two drones with communication functions, labeled as Drone 1 and Drone 2. Drone 1 has a flight speed of 5 m / s and is in a communication connection state, while Drone 2 has a flight speed of 5 m / s and is in a communication and sensing connection state.

[0152] Drone 1 transfers from the communication connection state to the communication and sensing connection state:

[0153] 1. When the terminal sends a communication and sensing connection request to the base station or the base station itself has a communication and sensing connection request, the base station sends a communication and sensing connection indication to the terminal and requires the terminal to send an FMCW sensing measurement signal in the specified time-frequency resources. The base station receives the sensing measurement signal transmitted by the terminal and measures the channel quality.

[0154] 2. The SINR of the channel quality index is greater than 15 dB, meeting the sensing conditions. The base station uses the sensing measurement signal to sense the terminal's position and distinguishes different terminals based on the sensing measurement signal. The terminal enters the communication and sensing connection state. The terminal transmits and the base station receives the sensing mode. The base station assigns a communication and sensing connection identifier to the terminal and sends it to the terminal at an interval of 0.1 s.

[0155] 3. Based on the sensed terminal position, the base station transmits a target sensing beam to the terminal and senses the terminal through the echo signal. The base station requires the terminal to transmit a sensing measurement signal at an interval of 1 s for the base station to confirm the sensing quality. At this time, the terminal transmits and the base station receives mode ends, and it transfers to the base station transmits and receives itself sensing mode.

[0156] 4. At a certain moment, due to factors such as obstacle occlusion for Drone 1, the base station cannot detect power exceeding the set threshold in the range-Doppler spectrum within T2 = 0.1 s. Then the base station configures Drone 1 to transfer from the communication and sensing connection state to the communication connection state. At this time, the communication channel environment deteriorates. The modulation and coding scheme (MCS) level of the base station's original communication with the drone was MCS = 16. The base station uses the highly reliable MCS = 8 level and requires Drone 1 to transmit a sensing measurement signal in the specified time-frequency resources at an interval of T time (T << the above 1 s) for the base station to sense the terminal position.

[0157] 5. After receiving the first information sent by the base station, Drone 1 transmits a sensing measurement signal in the specified time-frequency domain resources. After receiving the sensing signal transmitted by Drone 1, the base station senses the terminal and its surrounding area.

[0158] 6. The SINR, an indicator of the channel quality corresponding to the sensing measurement signal sent by the terminal, is greater than 15 dB, meeting the sensing condition. The base station uses the sensing measurement signal to sense the terminal's location and distinguish different terminals based on the sensing measurement signal. UAV 1 resumes the sensing connection and transfers back to the communication-sensing connection state. At this time, the sensing mode is the terminal-transmits-base-station-receives mode.

[0159] 7. Based on the sensed terminal location, the base station transmits a target sensing beam to the terminal and senses the terminal through the echo signal. The base station requires the terminal to send a sensing measurement signal every 1 s for the base station to confirm the sensing quality, ends the terminal-transmits-base-station-receives mode, and transfers to the base-station-transmits-and-receives-itself sensing mode.

[0160] UAV 2 transfers from the communication-sensing connection state to the communication connection state:

[0161] 1. At a certain moment, due to factors such as obstacle occlusion for UAV 2, the base station cannot detect a sensing target with power exceeding the set threshold in the range-Doppler spectrum within 0.1 s. UAV 2 transfers from the communication-sensing connection state to the communication connection state. At this time, the communication channel environment deteriorates, and the MCS level for the base station to communicate with UAV 2 is MCS = 16. The base station uses the highly reliable MCS = 8 level to require UAV 2 to send a sensing measurement signal at specified time-frequency resource intervals T (T << the above T1) for the base station to sense the terminal location.

[0162] 2. The SINR, an indicator of the channel quality corresponding to the sensing measurement signal sent by the terminal, is less than 15 dB, not meeting the sensing condition. The base station determines that UAV 2 has lost the sensing connection and transfers to the communication connection state.

[0163] It should be noted that in the sensing mode of terminal-transmits-base-station-receives described in the above embodiments, the distance loss of the terminal-transmits-base-station-receives sensing mode = propagation distance^-2, while the distance loss of the base-station-transmits-and-receives-itself echo sensing mode = propagation distance^-4. It can be seen that the distance loss corresponding to terminal-transmits-base-station-receives is smaller, and the noise is also smaller, which can facilitate the base station to more accurately locate the terminal. However, this mode will increase the power consumption of the terminal. Therefore, after the base station determines the location of the terminal, it sends a target sensing beam to the terminal for sensing to save the power consumption of the terminal.

[0164] It should be noted that for the handover between the first connection state and the fourth connection state, the second connection state or the third connection state can be used as an intermediate state for the handover. Similarly, for the handover between the second connection state and the third connection state, the first connection state or the fourth connection state can be used as an intermediate state for the handover. The handover between adjacent two states can refer to the description of the above embodiments and will not be repeated here.

[0165] The communication method provided by the embodiments of the present disclosure determines the connection status of a terminal by judging whether the terminal is currently communicating with a base station and whether the terminal can be sensed by the base station, and then manages the terminal according to the connection status. In the communication and sensing scenario, a scheduling strategy is selected according to the connection status of the terminal to allocate resources, ensuring communication and sensing performance, realizing different degrees of communication and sensing joint applications, and effectively avoiding waste of communication resources or sensing resources.

[0166] Further, the embodiments of the present disclosure ensure the communication and sensing requirements of the terminal in different channel environments through a complete state transition strategy, and meet the different requirements of the base station and the terminal at different times through the conversion of different states. In addition, the base station that determines the connection status of the terminal can transmit the connection status information to adjacent base stations, improving the overall control of the communication network over the user access status and providing better mobility management services for users.

[0167] It can be understood that, in order to implement the above functions, a communication device (which can be the above-mentioned base station) includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0168] The embodiments of the present disclosure can divide the communication device into functional modules according to the above method embodiments. For example, each function can correspond to a functional module, or two or more functions can be integrated into one functional module. The above integrated modules can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is illustrative, only a logical function division, and there can be other division methods in actual implementation. The following takes the example of dividing each function into a corresponding functional module for illustration.

[0169] Figure 10 is a schematic structural diagram of a communication device provided by the embodiments of the present disclosure, and the communication device can execute the communication method provided by the above method embodiments. As Figure 10 shown, the communication device includes a determination module 1001 and a management module 1002.

[0170] The determination module 1001 is used to determine the connection status of the terminal; the connection status is used to indicate whether the terminal is currently in the process of communicating with the base station and / or is sensed by the base station;

[0171] The management module 1002 is used to manage the terminal according to the connection status.

[0172] In the case where the functions of the above integrated modules are implemented in the form of hardware, the embodiments of the present disclosure provide another possible structure of the communication device involved in the above embodiments. As Figure 11 shown, the communication device 110 includes: a processor 1102, a bus 1104. Optionally, the communication device may further include a memory 1101; optionally, the communication device may further include a communication interface 1103.

[0173] The processor 1102 may be a device that implements or executes various exemplary logic blocks, modules, and circuits described in connection with the embodiments of the present disclosure. The processor 1102 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the embodiments of the present disclosure. The processor 1102 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0174] The communication interface 1103 is used to connect to other devices through a communication network. The communication network may be an Ethernet, a radio access network, a wireless local area network (WLAN), etc.

[0175] The memory 1101 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM), or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium, or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0176] As a possible implementation, the memory 1101 may exist independently of the processor 1102. The memory 1101 may be connected to the processor 1102 through the bus 1104 for storing instructions or program code. When the processor 1102 calls and executes the instructions or program code stored in the memory 1101, the communication method provided by the embodiments of the present disclosure can be implemented.

[0177] In another possible implementation, the memory 1101 can also be integrated with the processor 1102.

[0178] The bus 1104 can be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 1104 can be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity of representation, Figure 11 it is represented by only one thick line in the figure, but it does not mean that there is only one bus or one type of bus.

[0179] In some embodiments, the memory 1101 stores executable instructions. When the processor 1102 executes the executable instructions, the communication device is caused to perform the communication method described in any one of the above embodiments.

[0180] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium). The computer-readable storage medium stores computer program instructions. When the computer program instructions run on a computer, the computer is caused to perform the communication method described in any one of the above embodiments.

[0181] Exemplarily, the above computer-readable storage medium may include, but is not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes, etc.), optical discs (e.g., Compact Disks (CDs), Digital Versatile Disks (DVDs), etc.), smart cards, and flash memory devices (e.g., Erasable Programmable Read-Only Memories (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0182] The embodiments of the present disclosure provide a computer program product containing instructions. When the computer program product runs on a computer, the computer is caused to perform the communication method described in any one of the above embodiments.

[0183] As described above, the above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present disclosure should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, The method includes: Determining the connection status of the terminal; the connection status is used to indicate whether the terminal is currently in the process of communicating with the base station and / or is sensed by the base station; Managing the terminal according to the connection status.

2. The method according to claim 1, wherein The connection status is any one of the following: The first connection status; the first connection status is used to indicate that the terminal is not currently in the process of communicating with the base station and is not sensed by the base station; The second connection status; The second connection status is used to indicate that the terminal is currently in the process of communicating with the base station and is not sensed by the base station; The third connection status; The third connection status is used to indicate that the terminal is currently sensed by the base station and is not in the process of communicating with the base station; The fourth connection status; the fourth connection status is used to indicate that the terminal is currently in the process of communicating with the base station and is sensed by the base station.

3. The method according to claim 2, characterized in that, Determining the connection status of the terminal includes: When neither the first preset condition nor the second preset condition is satisfied, determining that the terminal is in the first connection status; When the first preset condition is satisfied and the second preset condition is not satisfied, determining that the terminal is in the second connection status; When the first preset condition is not satisfied and the second preset condition is satisfied, determining that the terminal is in the third connection status; When the first preset condition and the second preset condition are both satisfied, determining that the terminal is in the fourth connection status; Wherein, the first preset condition is that data interaction with the terminal is detected within a first preset duration; the second preset condition is that the terminal can be sensed within a second preset duration.

4. The method according to claim 2, wherein When the terminal is in the first connection status, the method further includes: Sending a synchronization broadcast SSB signal through beam scanning; When it is detected that the terminal completes the access process through the SSB signal, switching the connection status of the terminal from the first connection status to the second connection status.

5. The method according to claim 2, characterized in that When the terminal is in the third connection status, the method further includes: Sending an SSB signal through beam scanning; When it is detected that the terminal completes the access process through the SSB signal, switching the connection status of the terminal from the third connection status to the fourth connection status.

6. The method according to claim 2, wherein When the terminal is in the second connection status, the method further includes: When it is detected that the communication connection with the terminal is disconnected, switching the connection status of the terminal from the second connection status to the first connection status.

7. The method according to claim 2, characterized in that, When the terminal is in the fourth connection status, the method further includes: When it is detected that the communication connection with the terminal is disconnected, switching the connection status of the terminal from the fourth connection status to the third connection status.

8. The method according to claim 2, characterized in that, When the terminal is in the first connection status, the method further includes: Sending a sensing signal through beam scanning; Receiving the echo signal of the terminal for the sensing signal; When the terminal can be sensed within a second preset time period according to the echo signal, switch the connection state of the terminal from the first connection state to the third connection state.

9. The method according to claim 2, wherein When the terminal is in the second connection state, the method further includes: Sending a first message to the terminal; the first message is used to instruct the terminal to send a sensing measurement signal; Measuring the sensing measurement signal to obtain a channel quality; When the channel quality is greater than a preset threshold, switch the connection state of the terminal from the second connection state to the fourth connection state.

10. The method according to claim 2, characterized in that When the terminal is in the third connection state, the method further includes: When the terminal cannot be sensed within the second preset time period, switch the connection state of the terminal from the third connection state to the first connection state.

11. The method according to claim 2, wherein When the terminal is in the fourth connection state, the method further includes: When the terminal cannot be sensed within the second preset time period, switch the connection state of the terminal from the fourth connection state to the second connection state.

12. The method according to claim 2, characterized in that, The method further includes: When the terminal is in the fourth connection state, periodically sending a second message to the terminal; the second message is used to indicate that the terminal is currently in the fourth connection state.

13. The method according to claim 2, wherein The method further includes: When the terminal is in the fourth connection state, receiving a third message sent by the terminal; the third message is used to request communication information and / or sensing information; In response to the third message, sending control information and / or sensing information to the terminal.

14. The method according to claim 1, wherein Managing the terminal according to the connection state includes: In response to a trigger condition, the base station manages the terminal according to the connection state; the trigger condition includes at least one of the following: meeting a predefined condition, receiving an operation instruction, receiving a request from the terminal.

15. The method according to claim 1, characterized in that, The method further includes: Sending a third message to other base stations within a preset area; the third message is used to indicate the connection state of the terminal.

16. A communication device, characterized in that, Includes: A processor and a memory for storing instructions executable by the processor; Wherein, the processor is configured to execute the instructions such that the communication device executes the communication method according to any one of claims 1-15.

17. A computer-readable storage medium, characterized in that, A computer instruction is stored on the computer-readable storage medium, such that the communication device executes the communication method according to any one of claims 1-15.

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