Low-altitude communication method, device, system, base station equipment and readable storage medium

Abstract

The application relates to a low-altitude communication method, device, system, base station equipment and a computer readable storage medium. The method comprises the following steps: in response to a handover request fed back by a target terminal, sending an indication request to a second target base station adjacent to a first target base station; the indication request is used for instructing the second target base station to broadcast an initial base station number to the target terminal; receiving a first performance index corresponding to the initial base station number fed back by the target terminal, and determining a handover strategy according to the first performance index; and sending a connection request to the target terminal according to the handover strategy, wherein the connection request is used for instructing the target terminal to perform a communication connection with the second target base station. The method can improve the performance of low-altitude communication.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile communication technology, in particular to a low-altitude communication method, device, system, base station equipment and computer readable storage medium. BACKGROUND

[0002] With the development of communication network technology, a scenario of joint networking of low-altitude network and ground network appears, and a low-altitude base station for implementing the low-altitude communication network is determined in a target area, and the low-altitude base station uses dual-carrier beams, and simultaneously configures broadcast beams for ground and air to meet the service requirements of low-altitude terminals and ground terminals.

[0003] In the conventional technology, a low-altitude base station for implementing a low-altitude communication network is determined in a target area, and the low-altitude base station uses dual-carrier beams, and simultaneously configures broadcast beams for ground and air to meet the service requirements of low-altitude terminals and ground terminals.

[0004] However, in the current conventional technology, when the low-altitude base station has a large load of ground users, or the low-altitude base station needs to perform 2CC (2 Component Carriers, 2 carrier aggregation) or 3CC (3 Component Carriers, 3 carrier aggregation) carrier aggregation (5G-A or 5G+) according to service requirements, the low-altitude base station mainly serves ground services, and the service conflict between the ground network and the low-altitude network cannot meet the requirements of low-altitude services, thereby seriously affecting the performance of low-altitude network communication and leading to poor performance of low-altitude network communication. SUMMARY

[0005] Therefore, it is necessary to provide a low-altitude communication method, device, system, base station equipment and computer readable storage medium to solve the above technical problems.

[0006] In a first aspect, the present application provides a low-altitude communication method, which is applied to a first target base station and includes the following steps:

[0007] In response to a handover request fed back by a target terminal, an indication request is sent to a second target base station adjacent to the first target base station; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal.

[0008] A first performance index corresponding to the initial base station number fed back by the target terminal is received, and a handover strategy is determined according to the first performance index.

[0009] A connection request is sent to the target terminal according to the handover strategy, and the connection request is used to instruct the target terminal to perform communication connection with the second target base station.

[0010] In one of the embodiments, the step of determining the handover strategy according to the first performance index includes the following steps:

[0011] If the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station, the handover strategy is determined as a first handover strategy;

[0012] If the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station, the handover strategy is determined as a second handover strategy.

[0013] In one of the embodiments, the sending of the connection request to the target terminal according to the handover strategy comprises:

[0014] If the handover strategy is the first handover strategy, a target base station number of the second target base station sent by the second cluster master base station is added to the connection request sent to the target terminal, instructing the target terminal to perform a communication connection with the second target base station according to the first handover strategy;

[0015] If the handover strategy is the second handover strategy, a base station number of the second cluster master base station is added to the connection request sent to the target terminal, instructing the target terminal to perform a communication connection with the second cluster master base station according to the base station number of the second cluster master base station, so that the second cluster master base station determines a target base station number.

[0016] The communication connection of the target terminal with the second cluster master base station is used to realize the communication connection of the target terminal with the second target base station.

[0017] In a second aspect, the application provides a low-altitude communication method, which is applied to a target terminal and comprises:

[0018] When a second performance index between the target terminal and a first target base station is lower than a second preset threshold, a handover request is fed back to the first target base station;

[0019] An initial base station number broadcast by a second target base station adjacent to the first target base station is received, a performance measurement is performed on a broadcast beam carrying the initial base station number, a first performance index is obtained, and the first performance is fed back to the first target base station;

[0020] A connection request fed back by the first target base station is received, and a second target base station is connected based on a handover strategy in the connection request.

[0021] In one of the embodiments, the connection of the second target base station based on the handover strategy in the connection request comprises:

[0022] If the handover strategy is a first handover strategy, a target base station number of the second target base station in the connection request sent by the first target base station is used to perform a communication connection with the second target base station;

[0023] If the switching strategy is the second switching strategy, a base station number of the second cluster master base station is added to the connection request sent to the target terminal, indicating the target terminal to perform communication connection with the second cluster master base station according to the base station number of the second cluster master base station, so that the second cluster master base station determines the target base station number.

[0024] In a third aspect, the present application further provides a low-altitude communication device, which is applied to a first target base station and comprises:

[0025] A first sending module is configured to send an indication request to a second target base station adjacent to the first target base station in response to a switching request fed back by a target terminal, and the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal.

[0026] A decision module is configured to receive a first performance index corresponding to the initial base station number fed back by the target terminal, and determine a switching strategy according to the first performance index.

[0027] A second sending module is configured to send a connection request to the target terminal according to the switching strategy, and the connection request is used to instruct the target terminal to perform communication connection with a second target base station.

[0028] In one of the embodiments, the decision module is specifically configured to determine the switching strategy as a first switching strategy if the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station.

[0029] If the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station, the switching strategy is determined as a second switching strategy.

[0030] In one of the embodiments, the second sending module is specifically configured to add a target base station number of the second target base station sent by a second cluster master base station to the connection request sent to the target terminal if the switching strategy is the first switching strategy, and instruct the target terminal to perform communication connection with the second target base station according to the first switching strategy.

[0031] If the switching strategy is the second switching strategy, the base station number of the second cluster master base station is added to the connection request sent to the target terminal, indicating the target terminal to perform communication connection with the second cluster master base station according to the base station number of the second cluster master base station, so that the second cluster master base station determines the target base station number.

[0032] The communication connection between the target terminal and the second cluster master base station is used to realize the communication connection between the target terminal and the second target base station.

[0033] In a fourth aspect, the application further provides a low-altitude communication device, which is applied to a target terminal and comprises:

[0034] a feedback module, configured to feed back a switching request to the first target base station when a second performance index between the target terminal and the first target base station is lower than a second preset threshold value;

[0035] a performance measurement module, configured to receive an initial base station number broadcast by a second target base station adjacent to the first target base station, perform performance measurement on a broadcast beam carrying the initial base station number, obtain a first performance index, and feed back the first performance to the first target base station;

[0036] a connection module, configured to receive a connection request fed back by the first target base station, and perform communication connection with a second target base station based on a switching strategy in the connection request.

[0037] In one of the embodiments, the connection module is specifically configured to, if the switching strategy is a first switching strategy, perform communication connection with the second target base station according to a target base station number of the second target base station in the connection request sent by the first target base station;

[0038] if the switching strategy is a second switching strategy, perform communication connection with a second cluster master base station according to a base station number of the second cluster master base station in the connection request sent by the first target base station, and perform communication connection with the second target base station according to a target base station number of the second target base station fed back by the second cluster master base station.

[0039] In a fifth aspect, the application further provides a low-altitude communication system, which comprises:

[0040] a first target base station, configured to send an indication request to a second target base station adjacent to the first target base station in response to a switching request fed back by a target terminal; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal; receive a first performance index corresponding to the initial base station number fed back by the target terminal, determine a switching strategy according to the first performance index; send a connection request to the target terminal according to the switching strategy; the connection request is used to instruct the target terminal to perform communication connection with the second target base station;

[0041] the target terminal, configured to perform communication connection with the second target base station based on the switching strategy;

[0042] a second cluster master base station, configured to feed back a target base station number of the second target base station to the target terminal or the first target base station according to the switching strategy.

[0043] In one of the embodiments, the target terminal is specifically configured to feed back a handover request to the first target base station when a second performance index between the target terminal and the first target base station is lower than a second preset threshold value.

[0044] receive an initial base station number broadcast by a second cluster master base station adjacent to the first target base station, perform performance measurement on a broadcast beam carrying the initial base station number to obtain a first performance, and feed back the first performance to the first target base station.

[0045] receive a handover strategy fed back by the first target base station, and perform communication connection with a second target base station based on the handover strategy.

[0046] In one of the embodiments, the second cluster master base station is specifically configured to determine a target second cluster slave base station according to load states of second cluster slave base stations attached to each of the second cluster master base stations when the second cluster master base station does not meet a service requirement of the target terminal.

[0047] feed back a base station number of the target second cluster slave base station to the target terminal, and instruct the target second cluster slave base station to configure a broadcast beam as a target broadcast beam corresponding to the second cluster master base station.

[0048] In a sixth aspect, the present application further provides a base station device, comprising a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program.

[0049] The processor is configured to control the transmitter to send an indication request to a second target base station adjacent to the first target base station in response to a handover request fed back by a target terminal, and the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal.

[0050] The receiver is configured to receive, under the control of the processor, a first performance index corresponding to the initial base station number fed back by the target terminal.

[0051] The processor is configured to determine a handover strategy according to the first performance index.

[0052] The transmitter is configured to send, under the control of the processor, a connection request to the target terminal according to the handover strategy, and the connection request is used to instruct the target terminal to perform communication connection with a second target base station.

[0053] In a seventh aspect, the present application further provides a communication device, comprising a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program.

[0054] The transmitter is configured to feed back a handover request to the first target base station when a second performance index between the target terminal and the first target base station is lower than a second preset threshold under the control of the processor.

[0055] The receiver is configured to receive an initial base station number broadcast by a second target base station adjacent to the first target base station under the control of the processor.

[0056] The processor is configured to perform performance measurement on a broadcast beam carrying the initial base station number to obtain a first performance index.

[0057] The transmitter is configured to feed back the first performance to the first target base station under the control of the processor.

[0058] The receiver is configured to receive a connection request fed back by the first target base station under the control of the processor, and perform communication connection with a second target base station based on a handover strategy in the connection request.

[0059] In an eighth aspect, the present application further provides a computer readable storage medium, which has a computer program stored thereon, and the computer program is executed by a processor to implement the following steps:

[0060] In response to a handover request fed back by a target terminal, sending an indication request to a second target base station adjacent to the first target base station; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal.

[0061] Receiving a first performance index corresponding to the initial base station number fed back by the target terminal, and determining a handover strategy according to the first performance index.

[0062] Sending a connection request to the target terminal according to the handover strategy, and the connection request is used to instruct the target terminal to perform communication connection with a second target base station.

[0063] In a ninth aspect, the present application further provides a computer readable storage medium, which has a computer program stored thereon, and the computer program is executed by a processor to implement the following steps:

[0064] When a second performance index between the target terminal and the first target base station is lower than a second preset threshold, feeding back a handover request to the first target base station.

[0065] Receiving an initial base station number broadcast by a second target base station adjacent to the first target base station, performing performance measurement on a broadcast beam carrying the initial base station number to obtain a first performance index, and feeding back the first performance to the first target base station.

[0066] Receiving the connection request fed back by the first target base station, and performing communication connection with the second target base station based on the handover strategy in the connection request.

[0067] The low-altitude communication method, device, system, base station device, and computer readable storage medium described above, in response to the handover request fed back by the target terminal, send an indication request to a second target base station adjacent to the first target base station; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal; receive the first performance index corresponding to the initial base station number fed back by the target terminal, determine the handover strategy according to the first performance index; and send a connection request to the target terminal according to the handover strategy, the connection request being used to instruct the target terminal to perform communication connection with the second target base station. By using the method, the first target base station instructs the adjacent second target base station to interact with the target terminal through the handover request fed back by the target terminal, obtains the first performance index fed back by the target terminal, and determines the handover strategy according to the first performance index, so as to realize communication connection between the target terminal and the second target base station with stronger communication performance, and solve the problem that when the service conflict between the ground network and the low-altitude network occurs in the first target base station, the first target base station originally communicating with the target terminal is switched to the second target base station, so that the second target base station provides low-altitude network service to the target terminal, and the communication performance and user experience of the low-altitude network are improved. BRIEF DESCRIPTION OF DRAWINGS

[0068] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without any creative effort.

[0069] Figure 1 An application environment diagram of the low-altitude communication method in an embodiment;

[0070] Figure 2 A flowchart of the low-altitude communication method applied to the first target base station in an embodiment;

[0071] Figure 3 A schematic diagram of a low-altitude cluster network architecture in an embodiment;

[0072] Figure 4 A flowchart of determining the handover strategy in an embodiment;

[0073] Figure 5 A flowchart of the first target base station performing low-altitude communication under different handover strategies in an embodiment;

[0074] Figure 6This is a flowchart illustrating a low-altitude communication method applied to a target terminal in one embodiment;

[0075] Figure 7 This is a schematic diagram illustrating the process of a target terminal performing low-altitude communication under different handover strategies in one embodiment;

[0076] Figure 8 This is a flowchart illustrating an example of a low-altitude communication method in one embodiment;

[0077] Figure 9 This is a structural block diagram of a low-altitude communication device applied to a first target base station in one embodiment;

[0078] Figure 10 This is a structural block diagram of a low-altitude communication device applied to a target terminal in one embodiment;

[0079] Figure 11 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0080] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0081] Figure 1 This is a schematic diagram illustrating an application scenario of a low-altitude communication method provided in an embodiment of this application. For example... Figure 1 As shown, this scenario includes a first target base station 100, a second target base station 200, and a target terminal 300. The target terminal 300 transmits data with either the first target base station 100 or the second target base station 200 via a network. The first target base station 100 can be any one of the first cluster master base station 101 or any one of the multiple first cluster slave base stations 102 attached to the first cluster master base station 101; the second target base station 200 can be any one of the second cluster master base station 201 or any one of the multiple second cluster slave base stations 202 attached to the second cluster master base station 201. The first target base station 100 is the original base station providing service to the target terminal 300, and can be either the first cluster master base station 101 or any one of the first cluster slave base stations 102. Similarly, the second target base station 200 is the base station providing service to the target terminal after a HO (Handover) handover, and can be either the second cluster master base station 201 or any one of the second cluster slave base stations 202.

[0082] The first target base station 100 and the second target base station 200 can be base stations (Base Transceiver Station, BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), can be base stations (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), can be Evolutional Node B (eNB or eNodeB) in LTE, or can be relay stations or access points, or base stations in 5G network, and the like, and are not limited herein. The target terminal 300 can be a low-altitude terminal, and is an aerial device operating at a low altitude, and mainly includes low-altitude aircraft such as unmanned aerial vehicles and small aircraft.

[0083] Before introducing the specific embodiments of the present application, the professional terms involved in the present application are explained:

[0084] CM: Cluster Master, (low-altitude) cluster master base station, is a main base station responsible for managing and coordinating other base stations in the (low-altitude) cluster. It plays a core role in the low-altitude network, and is responsible for signal strength monitoring, load management, and switching instructions for unmanned aerial vehicles.

[0085] CS: Cluster Slaver, (low-altitude) cluster slave base station, is a base station subordinate to the (low-altitude) cluster master base station, and is responsible for providing communication services for unmanned aerial vehicles. They are managed by the (low-altitude) cluster master base station, and perform signal transmission tasks according to instructions.

[0086] UE: User Equipment, user equipment, refers to a device operating in a low-altitude network, for example, an unmanned aerial vehicle. In the embodiments of the present application, the UE refers to an unmanned aerial vehicle performing signal measurement and base station switching operations.

[0087] RSRP: Reference Signal Received Power, reference signal received power, is an index for measuring the received signal strength in a wireless network. RSRP is used to evaluate signal quality and determine base station switching time.

[0088] SINR: Signal to Interference plus Noise Ratio, signal to interference plus noise ratio, is a key index for measuring received signal quality. SINR is used to evaluate the reliability of the communication link, and affects base station selection and switching decisions.

[0089] LOS: Line of Sight, LOS propagation refers to the propagation mode of signals without obstacles. In the LOS condition, the signal propagation loss is small, and the coverage effect is good.

[0090] HO: Handover, handover refers to the process of user equipment (such as drones, etc.) switching from one base station to another base station during movement. An effective handover mechanism can improve the coverage range and service continuity of the low-altitude network.

[0091] In one embodiment, as shown in Figure 2 , a low-altitude communication method is provided, which is applied to the first target base station in Figure 1 for example, including the following steps:

[0092] Step 202, in response to the handover request fed back by the target terminal, sending an indication request to the second target base station adjacent to the first target base station.

[0093] Among them, the indication request is used to instruct the second target base station to broadcast the initial base station number to the target terminal.

[0094] In the embodiments of the present application, the current low-altitude communication network is based on the 5G+ communication network on the ground user coverage, and takes into account the low-altitude coverage. 3.5G adopts double carrier, that is, the first carrier (such as the F1 carrier shown in Figure 3 ) covers ground users. Since the low-altitude coverage is LOS, the path loss is relatively small compared to the ground propagation loss. Therefore, the inter-station distance of the low-altitude base station is generally set to 3-5 times the inter-station distance of the ground base station. Some ground base stations at fixed positions (with an inter-station distance of 3-5 times the inter-station distance of the ground base station) are set as low-altitude base stations, that is, the second carrier (such as the F2 carrier shown in Figure 3 ) of the low-altitude base station is configured with broadcast beams for ground and air at the same time, realizing dynamic sharing of business beams, and taking into account the coverage of ground users and low-altitude drone users.

[0095] First, as shown in Figure 3As shown, the administrator converts the ground base station into a new network architecture including low-altitude cluster master base stations (CM) and low-altitude cluster slave base stations (CS) through the base station management terminal (i.e. the management terminal of the low-altitude communication system), that is, by establishing a mesh connection between low-altitude cluster master base stations (CM) and a star connection between low-altitude cluster master base stations (CM) and their surrounding low-altitude cluster slave base stations (CS), to form an efficient low-altitude network structure. Specifically, the administrator can set the ground base station (second carrier) currently fixed as a low-altitude base station as a low-altitude cluster master base station (CM), and each low-altitude cluster master base station (CM) is responsible for managing a low-altitude cluster and serving as the core node of the low-altitude cluster. The low-altitude cluster master base station (CM) needs to be configured with a broadcast beam for ground and air, forming an A:B type (target type) broadcast beam (for example, 4:3, 5:2, etc.), and the low-altitude cluster master base station (CM) needs to have higher processing capability and resource management capability to support bidirectional communication for ground and air.

[0096] Secondly, the administrator sets the ground base station (first carrier) around the low-altitude cluster master base station (CM) as a low-altitude cluster slave base station (CS) belonging to the low-altitude cluster master base station (CM). The low-altitude cluster slave base station (CS) is an affiliated node of the low-altitude cluster master base station (CM) and is responsible for expanding the coverage and capacity of the low-altitude cluster, and the low-altitude cluster slave base station (CS) usually does not directly configure a broadcast beam for ground and air, but dynamically configures a service beam as needed to provide network services to low-altitude terminals.

[0097] The low-altitude cluster master base station (CM) and the low-altitude cluster slave base station (CS) can be distinguished by different identifiers. For example, the low-altitude cluster master base station (CM) can be assigned a unique base station identifier (e.g., CM(i), where i represents the i-th low-altitude cluster master base station). The low-altitude cluster slave base station (CS) can be assigned an identifier belonging to a certain low-altitude cluster master base station (e.g., CS(i, k), where i represents the low-altitude cluster master base station to which the low-altitude cluster slave base station belongs, and k represents the k-th low-altitude cluster slave base station). Further, for the intra-cluster relationship of each low-altitude cluster, the low-altitude cluster master base station (CM(i)) is connected to the surrounding low-altitude cluster slave base stations (CS(i, 1), CS(i, 2), …, CS(i, k)) in a star structure. Each low-altitude cluster slave base station (CS(i, k)) directly communicates with the low-altitude cluster master base station (CM(i)), forming a star topology centered on the low-altitude cluster master base station. For the inter-cluster relationship of each low-altitude cluster, different low-altitude cluster master base stations (CM(i)) are connected in a mesh structure, forming the global topology of the low-altitude network, such as low-altitude cluster master base stations CM(1), CM(2), and CM(3). Each low-altitude cluster master base station can directly communicate with other low-altitude cluster master base stations, forming a many-to-many connection relationship, and supporting fast switching and resource coordination between low-altitude clusters through the mesh structure. By connecting the low-altitude cluster master base station and its surrounding low-altitude cluster slave base stations in a star structure, and connecting the low-altitude cluster master base stations in a mesh structure, an efficient organization of the network topology is achieved, providing a basis for inter-cluster switching and intra-cluster selection of the serving base station.

[0098] In this embodiment and the following embodiments, the UAV terminal is taken as an example of the target terminal (UE), and the first target base station is the base station that provides network services to the UAV terminal at the initial position, which can be the first cluster master base station or the first cluster slave base station in the first target base station. When the current position of the UAV terminal is at the boundary of the service range of the first target base station during the low-altitude flight of the UAV terminal, the UAV terminal measures the broadcast beam RSRP and / or SINR of the current first target base station in real time and finds that the broadcast beam RSRP and / or SINR do not meet the service requirements of the UAV terminal, and the UAV terminal feeds back a switching request to the first target base station. Further, when the first target base station receives the switching request fed back by the UAV terminal, the first target base station responds to the switching request. If the first target base station is the first cluster master base station, the first target base station directly sends an indication request to the second cluster master base station in the adjacent second target base station (which is a low-altitude cluster of the first target base station). If the first target base station is the first cluster slave base station, the first target base station feeds back the first cluster master base station according to the switching request fed back by the current UAV terminal, and then the first cluster master base station sends an indication request to the second cluster master base station in the adjacent second target base station.

[0099] In step 204, the first performance indicator corresponding to the initial base station number fed back by the target terminal is received, and the switching strategy is determined according to the first performance indicator.

[0100] In the embodiment of the present application, after the second target base station receives the indication request fed back by the first cluster master base station in the first target base station, the second cluster master base station or the second cluster slave base station in the second target base station transmits a broadcast beam containing the base station number of itself to the UAV terminal in response to the indication request, where the base station number of itself is the initial base station number of the second cluster master base station or the second cluster slave base station in the second target base station. The UAV terminal receives the broadcast beam transmitted by the second target base station and measures the broadcast beam containing the initial base station number to obtain a first performance index corresponding to the broadcast beam. Finally, the UAV terminal feeds back the first performance index of the broadcast beam to the first target base station. After the first target base station receives the first performance index corresponding to each initial base station number fed back by the UAV terminal, the first target base station determines a handover strategy in cooperation with the UAV terminal according to the first performance index. If the first target base station is the first cluster slave base station, the first cluster slave base station feeds back the handover strategy to the first cluster master base station and feeds back the handover strategy to the second cluster master base station through the first cluster master base station. The handover strategy includes a first handover strategy and a second handover strategy. The first handover strategy is one-step handover, and the second handover strategy is two-step handover. If the signal quality of the second target base station represented by the first performance index is good and the load of the second target base station meets the connection requirement of the UAV terminal, the first target base station can determine the handover strategy as the first handover strategy, otherwise, the handover strategy is determined as the second target strategy. Optionally, the handover strategy can also be determined according to the service demand of the UAV terminal. For example, if the service in the UAV terminal is a high-bandwidth-demand service such as real-time video transmission, the handover strategy is determined as the second handover strategy, and if the service is a low-bandwidth and low-delay-sensitive service, the handover strategy is determined as the first handover strategy.

[0101] In step 206, a connection request is sent to the target terminal according to the handover strategy.

[0102] The connection request is used to indicate that the target terminal is connected to the second target base station for communication.

[0103] In the embodiment of the present application, the first cluster master base station in the first target base station generates a connection request according to the handover strategy determined in cooperation with the UAV terminal. The connection request includes the base station number of the second target base station and the handover strategy identifier, which is used to inform the UAV terminal of the handover strategy used for the communication connection with the second target base station.

[0104] After the UAV terminal receives the connection request, the UAV terminal is connected to the second target base station according to the handover strategy determined in cooperation. The detailed process of establishing the communication connection between the UAV terminal and the second target base station is described in detail in the following embodiment.

[0105] The low-altitude communication method, through the switching request fed back by the target terminal, instructs the adjacent second cluster master base station to interact with the target terminal to obtain the first performance index fed back by the target terminal, and determines the switching strategy according to the first performance index, so as to realize the communication connection between the target terminal and the second target base station with stronger communication performance, and solve the problem that when the ground network and the low-altitude network in the first target base station conflict, the first target base station originally communicating with the target terminal is switched to the second target base station, so that the second target base station provides low-altitude network service for the target terminal, thereby improving the communication performance and user experience of the low-altitude network.

[0106] In one exemplary embodiment, the switching strategy includes a first switching strategy and a second switching strategy, and the first target base station determines the switching strategy suitable for the target terminal based on the first performance index between the target terminal and the second target base station and the type of the second target base station, such as Figure 4 As shown in the figure, step 204 includes steps 402 to 404. Among them:

[0107] Step 402, if the first performance index is higher than the first preset threshold or the second target base station is a second cluster slave base station affiliated to the second cluster master base station, the switching strategy is determined as the first switching strategy.

[0108] In the embodiment of the application, the first switching strategy is a one-step switching strategy, that is, the second cluster master base station decides the second target base station for providing network service to the unmanned aerial vehicle terminal, and feeds back the base station number of the second target base station to the first cluster master base station, and then feeds back to the target terminal through the first cluster master base station, instructing the unmanned aerial vehicle terminal to directly communicate with the second target base station.

[0109] When the first performance index of the broadcast beam carrying the initial base station number measured by the unmanned aerial vehicle terminal is higher than the first preset threshold, it indicates that the signal quality between the unmanned aerial vehicle terminal and the second target base station is higher, and in this case, the unmanned aerial vehicle terminal can be directly connected with the second target base station for communication, and the switching delay is reduced in the switching process. Or, if the second target base station responds to the indication request of the first target base station and transmits the broadcast beam broadcasting the initial base station number, the second target base station is the second cluster master base station, which indicates that the current load of the second cluster master base station is lighter and can support low-altitude service, and the unmanned aerial vehicle terminal can be directly connected with the second cluster master base station for communication. The first cluster master base station in the first target base station determines the switching strategy as one-step switching, that is, the first switching strategy.

[0110] Step 404, if the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station, the switching strategy is determined as the second switching strategy.

[0111] In this embodiment of the application, the second handover strategy is a two-step handover strategy. The first cluster master base station instructs the UAV terminal to first establish a communication connection with the second cluster master base station, that is, instructs the UAV to switch the first target base station (first cluster master base station or first cluster slave base station) currently providing network services to the second cluster master base station, so that the second cluster master base station becomes the serving base station of the current UAV terminal. The second cluster master base station determines the second target base station and sends the base station number of the second cluster slave base station used to provide network services to the UAV terminal through signaling, so that the serving base station of the UAV terminal switches from the second cluster master base station to the second cluster slave base station.

[0112] When the first performance index of the broadcast beam carrying the initial base station number measured by the UAV terminal is lower than the first preset threshold, it indicates that the signal quality between the UAV terminal and the second target base station is poor. Since the cluster master base station usually has stronger signal coverage and stable communication resources, in order to ensure that the UAV terminal has a stable communication path during the handover process, the first cluster master base station in the first target base station determines the handover strategy as a two-step handover, namely the second handover strategy, and provides temporary services to the UAV terminal through the second cluster master base station until the UAV terminal finds the best second cluster slave base station.

[0113] In this embodiment, by setting a first handover strategy and a second handover strategy, the serving base station of the target terminal can be flexibly switched according to different network environments and communication needs. This ensures communication stability and reasonable resource allocation during the handover process, and improves handover efficiency by reducing intermediate steps. In this way, the low-altitude communication performance of the target terminal is improved in complex and ever-changing low-altitude communication scenarios.

[0114] In one exemplary embodiment, such as Figure 5 As shown, step 206 includes steps 502 to 504. Wherein:

[0115] Step 502: If the handover strategy is the first handover strategy, add the target base station number of the second target base station sent by the second cluster main base station to the connection request sent to the target terminal, and instruct the target terminal to establish a communication connection with the second target base station according to the first handover strategy.

[0116] In the embodiments of the present application, when the switching strategy is the first switching strategy, the first cluster master base station in the first target base station indicates to the second cluster master base station that the switching strategy is the first switching strategy, and then the second cluster master base station takes its own base station number or the base station number of the best second cluster slave base station selected as the target base station number, and feeds back the target base station number to the first cluster master base station. In addition, if the first target base station providing service to the unmanned terminal is a first cluster slave base station, the first cluster master base station also needs to send the target base station number fed back by the second cluster master base station to the first cluster slave base station providing service to the unmanned terminal. Then, the first target base station adds the target base station number to the connection request and sends the connection request to the unmanned terminal, indicating that the target terminal and the second target base station perform communication connection according to the first switching strategy. At the same time, after the first target base station indicates the first switching strategy to the second cluster master base station, the second cluster master base station broadcasts according to the preset beam configuration (including A:B type aggregated carrier for ground service and low-altitude service), and if the second target base station to be provided with service is a second cluster slave base station, the second cluster master base station indicates that the second cluster slave base station to be provided with service also broadcasts according to the preset beam configuration.

[0117] In step 504, if the switching strategy is the second switching strategy, the base station number of the second cluster master base station is added to the connection request sent to the target terminal, indicating that the target terminal performs communication connection with the second cluster master base station according to the base station number of the second cluster master base station, so that the second cluster master base station determines the target base station number.

[0118] The communication connection between the target terminal and the second cluster master base station is used to realize the communication connection between the target terminal and the second target base station.

[0119] In the embodiments of the present application, when the switching strategy is the first switching strategy, the first cluster master base station in the first target base station indicates to the second cluster master base station that the switching strategy is the first switching strategy, and the first target base station directly adds the base station number of the second cluster master base station to the connection request and sends it to the unmanned terminal, indicating that the unmanned terminal first performs communication connection with the second cluster master base station, so that the second cluster master base station determines the target base station number.

[0120] In the embodiments of the present application, by the first switching strategy and the second switching strategy, the first target base station providing service to the target terminal is switched to the second target base station, effectively reducing the business conflict between the ground network and the low-altitude network, improving the spectrum resource utilization efficiency and the network coverage capability, and also significantly reducing the switching delay through the flexible switching mechanism, ensuring the communication performance of the unmanned terminal in the complex airspace environment.

[0121] In one embodiment, as shown in Figure 6 , a low-altitude communication method is provided, which is applied to the target terminal in Figure 1 for example, including the following steps:

[0122] Step 602, when the second performance index between the target terminal and the first target base station is lower than the second preset threshold, feeding back a handover request to the first target base station.

[0123] In the embodiments of the present application, the embodiments and the following embodiments take the unmanned aerial terminal as an example of the target terminal (UE). In the flight process of the unmanned aerial terminal, the broadcast beam of the first target base station currently providing services is measured in real time, and the RSRP and / or SINR of the broadcast beam are obtained as the second performance index between the target terminal and the first target base station. When the second performance index is lower than the second preset threshold, it indicates that the current service communication quality is poor, and then the unmanned aerial terminal feeds back a handover request to the first target base station, requesting to switch the first target base station originally providing network services to other base stations with better communication quality.

[0124] Step 604, receiving the initial base station number broadcast by the second target base station adjacent to the first target base station, performing performance measurement on the broadcast beam carrying the initial base station number to obtain the first performance index, and feeding back the first performance to the first target base station.

[0125] In the embodiments of the present application, the first target base station sends an indication request to the second target base station adjacent to the first target base station according to the same process described in step 202, and the processing process of the first target base station will not be described in this embodiment. Then, the second target base station sends a broadcast beam containing its own base station number to the unmanned aerial terminal.

[0126] The unmanned aerial terminal receives and measures the broadcast beam transmitted by the second target base station, wherein the broadcast beam transmitted by the second target base station can be the base station number of the second low-altitude cluster master base station, or the broadcast beam of one or more second low-altitude cluster slave base stations. Further, the unmanned aerial terminal obtains the signal strength RSRP and / or signal-to-noise ratio SINR of the broadcast beam and feeds back to the first target base station.

[0127] Step 606, receiving the connection request fed back by the first target base station, and performing communication connection with the second target base station based on the handover strategy in the connection request.

[0128] In the embodiments of the present application, the first target base station receives and feeds back the connection request to the unmanned aerial terminal according to the same steps described in step 204, and the processing process of the first target base station will not be described in this embodiment. After the unmanned aerial terminal receives the connection request fed back by the first target base station, it determines the handover strategy in the connection request, and performs communication connection with the second target base station according to the handover strategy.

[0129] In the embodiment, the second performance index of the unmanned aerial vehicle terminal and the current serving base station is monitored, the handover request is triggered when the second performance index is lower than the second performance index, the first performance index corresponding to the broadcast beam of the adjacent second target base station is measured, and the base station handover is performed according to the handover strategy indicated by the first target base station according to the measurement result and the base station load condition, the communication connection is performed according to the second target base station after the handover, the service conflict between the ground network and the low-altitude network is effectively solved, and the network performance and user experience in the low-altitude communication scene are improved.

[0130] In one example embodiment, as shown in FIG. 7, step 606 includes steps 702-704. In which: Figure 7

[0131] In step 702, if the handover strategy is the first handover strategy, the unmanned aerial vehicle terminal performs the communication connection with the second target base station according to the target base station number of the second target base station carried in the connection request sent by the first target base station.

[0132] In the embodiment, when the handover strategy carried in the connection request fed back by the first target base station is the first handover strategy, the target base station number of the second target base station to be served is also included in the connection request. The unmanned aerial vehicle terminal performs the communication connection with the second target base station according to the target base station number. The second target base station can be the second cluster master base station or the second cluster slave base station.

[0133] In step 704, if the handover strategy is the second handover strategy, the unmanned aerial vehicle terminal performs the communication connection with the second cluster master base station according to the base station number of the second cluster master base station carried in the connection request sent by the first target base station, and performs the communication connection with the second target base station according to the target base station number of the second target base station fed back by the second cluster master base station.

[0134] In the embodiment, when the handover strategy carried in the connection request fed back by the first target base station is the second handover strategy, the base station number of the second cluster master base station is included in the connection request. The unmanned aerial vehicle terminal performs the communication connection with the second cluster master base station according to the base station number of the second cluster master base station, and then the service base station of the unmanned aerial vehicle terminal is switched to the second cluster master base station. Further, the second cluster master base station judges the second cluster slave base station to provide the service to the unmanned aerial vehicle terminal according to the load state of each second cluster slave base station, and then takes the base station number of the second cluster slave base station as the target base station number, and sends the target base station number to the unmanned aerial vehicle terminal through signaling. Finally, the unmanned aerial vehicle terminal performs the communication connection with the second target base station according to the target base station number fed back by the second cluster master base station, and the second target base station is the second cluster slave base station corresponding to the target base station number.

[0135] ​In the embodiment, the low-altitude network switching with high performance and low latency is realized by switching strategies, the service conflict between the ground network and the low-altitude network is effectively solved, the network performance and user experience are improved, the utilization of base station resources is optimized, the interference is reduced, and the communication performance of the target terminal and the second target terminal is improved.

[0136] In an exemplary embodiment, a low-altitude communication system is provided, and the system comprises:

[0137] The first target base station is configured to send an indication request to a second cluster master base station adjacent to the first target base station in response to a switching request fed back by the target terminal, the indication request is used to instruct the second cluster master base station to broadcast an initial base station number to the target terminal, receive a first performance index of a broadcast beam of the initial base station number fed back by the target terminal, determine a switching strategy according to the first performance index, and send a connection request to the target terminal according to the switching strategy, the connection request is used to instruct the target terminal to perform a communication connection with the second target base station through the second cluster master base station.

[0138] The target terminal is configured to perform a communication connection with the second target base station based on the switching strategy.

[0139] The second cluster master base station is configured to feed back a target base station number of the second target base station to the target terminal or the first target base station according to the switching strategy.

[0140] In the embodiment, when the switching strategy is a first switching strategy, the second cluster master base station feeds back the target base station number of the second target base station to a first cluster master base station in the first target base station; when the switching strategy is a second switching strategy, the second cluster master base station directly connects with the target terminal, and then feeds back the target base station number to the target terminal.

[0141] In an exemplary embodiment, the target terminal is specifically configured to feed back a switching request to the first target base station when a second performance index between the target terminal and the first target base station is lower than a second preset threshold.

[0142] The target terminal is specifically configured to receive an initial base station number broadcast by a second cluster master base station adjacent to the first target base station, perform performance measurement on a broadcast beam carrying the initial base station number to obtain a first performance, and feed back the first performance to the first target base station; receive a switching strategy fed back by the first target base station, and perform a communication connection with the second target base station based on the switching strategy.

[0143] In an exemplary embodiment, the second cluster master base station is specifically configured to determine a target second cluster slave base station according to a load state of a second cluster slave base station attached to each second cluster master base station when the second cluster master base station does not meet a service demand of the target terminal; feed back a base station number of the target second cluster slave base station to the target terminal, and instruct the target second cluster slave base station to configure a broadcast beam as a target broadcast beam corresponding to the second cluster master base station.

[0144] In the embodiments of the present application, after the second cluster master base station receives the indication request sent by the first cluster master base station, the load of the second cluster master base station is detected. If the load state of the second cluster master base station meets the service demand of the unmanned terminal, the second cluster master base station feeds back the base station number of the second cluster master base station to the unmanned terminal through the first target base station. If the load state of the second cluster master base station does not meet the service demand of the unmanned terminal, the second cluster master base station determines one or more second cluster slave base stations as second target base stations under the low-altitude cluster to which the second cluster master base station belongs according to the query results of historical query or real-time query, and feeds back the base station numbers of the second target base stations to the unmanned terminal through the first target base station. At the same time, the second cluster master base station in the second target base station instructs the second cluster slave base stations to be dynamically configured as broadcast beams of the same target type (A:B) as the second cluster master base station.

[0145] In one exemplary embodiment, as shown in Figure 8 A low-altitude communication method is provided, which is applied to a low-altitude communication system and includes the following steps:

[0146] Step 801, a ground base station (second carrier) is configured as a low-altitude cluster master base station (CM), and the broadcast beams of the ground base station to the ground and to the air are configured as A:B type, and the business beams are dynamically shared in real time.

[0147] Step 802, a mesh structure is formed among the low-altitude cluster master base stations (CM), and the base stations around the low-altitude cluster master base stations (CM) are configured as low-altitude cluster slave base stations (CS) to form a star structure with the low-altitude cluster master base stations (CM).

[0148] Step 803, the low-altitude cluster master base stations and the low-altitude cluster slave base stations are initialized.

[0149] Step 804, when the unmanned aerial vehicle measures that the RSRP or (and) SINR of the currently served low-altitude cluster slave (or master) CS (j, m) (or CM (j)) base station is lower than the corresponding threshold value at the boundary between low-altitude clusters, the unmanned aerial vehicle initiates a low-space handover request.

[0150] Step 805, after the adjacent low-altitude cluster master base station CM (i) receives the inter-cluster handover request, the load condition of the low-altitude cluster master base station CM (i) is checked. If the load condition is light, the low-altitude cluster master base station CM (i) directly informs the unmanned aerial vehicle to switch to the low-altitude cluster master base station CM (i). If the load condition is heavy, the load conditions of all slave base stations under the low-altitude cluster are checked, one or more slave base stations (CS (i, k)) with light load are selected, and the broadcast beams of the slave base stations (CS (i, k)) are dynamically configured as A:B type broadcast beams to the ground and to the air.

[0151] Step 806, the numbers of the selected low-altitude cluster master or slave base stations are informed to the unmanned aerial vehicle, and the unmanned aerial vehicle measures and reports the RSRP or (and) SINR of the received low-altitude cluster master or slave base stations.

[0152] Step 807, the current service base station negotiates a handover strategy according to the RSRP or (and) SINR value of the adjacent low-altitude cluster master or slave base station reported by the UAV: two-step handover, the UAV is first handed over from the current base station to the target master base station, and then the target master base station judges whether to hand over to the best slave base station; one-step handover, the target master base station transmits the information of the best slave base station to the UAV through the current base station, and the UAV is directly handed over to the target slave base station.

[0153] It should be understood that, although each step in the flowchart involved in each of the above-described embodiments is shown in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each of the above-described embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or steps or stages in other steps.

[0154] Based on the same inventive concept, the embodiments of the present application also provide a low-altitude communication device for implementing the above-mentioned low-altitude communication method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more low-altitude communication device embodiments provided below can refer to the limitations of the low-altitude communication method described above, which will not be repeated here.

[0155] In one exemplary embodiment, as shown in Figure 9 A low-altitude communication device 900 is provided, which is applied to a first target base station and includes a first sending module 901, a decision module 902, and a second sending module 903, wherein:

[0156] The first sending module 901 is configured to send an indication request to a second target base station adjacent to the first target base station in response to a handover request fed back by a target terminal; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal.

[0157] The decision module 902 is configured to receive a first performance indicator corresponding to the initial base station number fed back by the target terminal, and determine a handover strategy according to the first performance indicator.

[0158] The second sending module 903 is configured to send a connection request to the target terminal according to the handover strategy, and the connection request is used to instruct the target terminal to perform a communication connection with the second target base station.

[0159] In one of the embodiments, the decision module 902 is specifically configured to determine the handover strategy as the first handover strategy if the first performance index is higher than the first preset threshold or the second target base station is a second cluster master base station.

[0160] If the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station, the handover strategy is determined as the second handover strategy.

[0161] In one of the embodiments, the second sending module 903 is specifically configured to add the target base station number of the second target base station sent by the second cluster master base station to the connection request sent to the target terminal, to instruct the target terminal to perform the communication connection with the second target base station according to the first handover strategy if the handover strategy is the first handover strategy.

[0162] If the handover strategy is the second handover strategy, the base station number of the second cluster master base station is added to the connection request sent to the target terminal, to instruct the target terminal to perform the communication connection with the second cluster master base station according to the base station number of the second cluster master base station, so that the second cluster master base station determines the target base station number.

[0163] The communication connection between the target terminal and the second cluster master base station is used to implement the communication connection between the target terminal and the second target base station.

[0164] In one of the embodiments, as shown in Figure 10 A low-altitude communication device 1000 is also provided, which is applied to a first target base station and includes a feedback module 1001, a performance measurement module 1002, and a connection module 1003.

[0165] The feedback module 1001 is configured to feed back a handover request to the first target base station when a second performance index between the target terminal and the first target base station is lower than a second preset threshold.

[0166] The performance measurement module 1002 is configured to receive an initial base station number broadcast by a second target base station adjacent to the first target base station, perform performance measurement on a broadcast beam carrying the initial base station number to obtain a first performance index, and feed back the first performance to the first target base station.

[0167] The connection module 1003 is configured to receive a connection request fed back by the first target base station, and perform the communication connection with the second target base station based on the handover strategy in the connection request.

[0168] In one of the embodiments, the connection module 1003 is specifically configured to perform the communication connection with the second target base station according to the target base station number of the second target base station in the connection request sent by the first target base station if the handover strategy is the first handover strategy.

[0169] If the switching strategy is the second switching strategy, a communication connection is established with the second cluster master base station according to the base station number of the second cluster master base station in the connection request sent by the first target base station, and a communication connection is established with the second target base station according to the target base station number of the second target base station fed back by the second cluster master base station.

[0170] The modules in the low-altitude communication device can be implemented by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in a computer device in software form, so as to be called and executed by a processor to perform operations corresponding to the modules.

[0171] Figure 11 is a structural schematic diagram of a base station device provided by an embodiment of the application. Figure 11 The base station device 1100 shown includes at least one processor 1101, a memory 1102, and at least one network interface 1104. The various components in the base station device 1100 are coupled together by a bus system 1105. It can be understood that the bus system 1105 is used to realize the connection and communication between the components. In addition to including a data bus, the bus system 1105 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, all the buses are marked as the bus system 1105 in Figure 2 the description. In addition, the embodiment of the application also includes a transceiver 1106, which can be multiple elements, i.e., includes a transmitter and a receiver, and provides a unit for communicating with various other devices over a transmission medium.

[0172] It is to be appreciated that the memory 1102 in the embodiments of the present application can be a volatile memory or a nonvolatile memory, or can include both volatile and nonvolatile memory. Among them, the nonvolatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM) used as an external cache. By way of example, and not limitation, many forms of RAM can be used, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous Dynamic RAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1102 of the system and method described in the embodiments of the present application is intended to include, without being limited to, these and any other suitable types of memory.

[0173] In some embodiments, the memory 1102 stores elements, executable modules or data structures, or a subset thereof, or an extended set thereof, such as an operating system 11021. Among them, the operating system 11021 contains various system programs, such as framework layer, core library layer, driver layer, etc., for implementing various basic services and processing hardware-based tasks.

[0174] In the embodiments of the present application, by calling the programs or instructions stored in the memory 1102, the processor is used to control the transmitter to send an indication request to a second target base station adjacent to the first target base station in response to the handover request feedback by the target terminal; the indication request is used to indicate the second target base station to broadcast an initial base station number to the target terminal; the receiver is used to receive the first performance index corresponding to the initial base station number feedback by the target terminal; the processor is used to determine the handover strategy according to the first performance index; the transmitter is used to send a connection request to the target terminal according to the handover strategy, the connection request is used to indicate the target terminal to perform communication connection with the second target base station.

[0175] Part or all of the methods disclosed in the embodiments of the present application can also be applied in the processor 1101, or implemented by the processor 1101, or implemented by the processor 1101 in cooperation with other elements (for example, a transceiver). The processor 1101 can be an integrated circuit chip having a processing capability. In the implementation process, each step of the above method can be completed by integrated logic circuits or instructions in the form of software in the processor 1101. The processor 1101 described above can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Each method, step and logic block disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory 1102, and the processor 1101 reads the information in the memory 1102 and combines the hardware to complete the steps of the above method.

[0176] It can be understood that the embodiments described in the embodiments of the present application can be realized by hardware, software, firmware, middleware, microcode or a combination thereof. For hardware implementation, the processing unit can be realized in one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (DSP Device, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general processors, controllers, microcontrollers, microprocessors, other electronic units for executing functions described in the present application or a combination thereof.

[0177] For software implementation, the techniques described in the embodiments of the present application can be implemented by means of a module for performing the functions described in the embodiments of the present application, for example, processes, functions, etc. Software codes can be stored in a memory and executed by the processor 1101. The memory can be implemented in the processor 1101 or outside the processor 1101.

[0178] In one embodiment, the processor is specifically configured to determine the handover strategy as a first handover strategy if the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station.

[0179] The handover strategy is determined as a second handover strategy if the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station.

[0180] In one embodiment, the transmitter is specifically configured to add a target base station number of the second target base station sent by the second cluster master base station to a connection request sent to the target terminal if the handover strategy is the first handover strategy, and instruct the target terminal to perform the communication connection with the second target base station according to the first handover strategy.

[0181] The handover strategy is determined as a second handover strategy if the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station.

[0182] The communication connection between the target terminal and the second cluster master base station is used to implement the communication connection between the target terminal and the second target base station.

[0183] Those skilled in the art can understand that, Figure 11 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0184] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0185] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0186] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0187] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method of low-altitude communication, characterized by, The method is applied to a first target base station, and the method comprises: in response to a handover request fed back by a target terminal, sending an indication request to a second target base station adjacent to the first target base station; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal; receiving a first performance index corresponding to the initial base station number fed back by the target terminal, and determining a handover strategy according to the first performance index; sending a connection request to the target terminal according to the handover strategy; the connection request is used to instruct the target terminal to perform a communication connection with the second target base station; the first target base station and the second target base station are cluster master base stations or cluster slave base stations belonging to different clusters; the determination of the handover strategy according to the first performance index comprises: if the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station, the handover strategy is determined as a first handover strategy; the first handover strategy is to instruct the target terminal to directly perform a communication connection with the second target base station; if the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station, the handover strategy is determined as a second handover strategy; the second handover strategy is to instruct the target terminal to first perform a communication connection with the second cluster master base station and then switch from the second cluster master base station to the second cluster slave base station.

2. The method of claim 1, wherein, the sending of the connection request to the target terminal according to the handover strategy comprises: if the handover strategy is the first handover strategy, a target base station number of the second target base station sent by a second cluster master base station is added to the connection request and sent to the target terminal, so as to instruct the target terminal to perform a communication connection with the second target base station according to the first handover strategy; if the handover strategy is the second handover strategy, a base station number of the second cluster master base station is added to the connection request and sent to the target terminal, so as to instruct the target terminal to perform a communication connection with the second cluster master base station according to the base station number of the second cluster master base station, so that the second cluster master base station determines a target base station number; wherein the communication connection between the target terminal and the second cluster master base station is used to realize the communication connection between the target terminal and the second target base station.

3. A method of low-altitude communication, characterized by, The method is applied to a target terminal served by the first target base station in claim 1, and the method comprises: when a second performance index between the target terminal and the first target base station is lower than a second preset threshold, feeding back a handover request to the first target base station; receiving an initial base station number broadcast by a second target base station adjacent to the first target base station, performing performance measurement on a broadcast beam carrying the initial base station number to obtain a first performance index, and feeding back the first performance to the first target base station; receiving a connection request fed back by the first target base station, and performing a communication connection with a second target base station based on a handover strategy in the connection request.

4. The method of claim 3, wherein, the performance of the communication connection with the second target base station based on the handover strategy in the connection request comprises: If the switching strategy is the first switching strategy, a communication connection is established with the second target base station according to a target base station number of the second target base station in a connection request sent by the first target base station; If the switching strategy is the second switching strategy, a communication connection is established with the second cluster master base station according to a base station number of the second cluster master base station in the connection request sent by the first target base station, and a communication connection is established with the second target base station according to the target base station number of the second target base station fed back by the second cluster master base station.

5. A low-altitude communication system, characterized by, The system comprises: The first target base station is configured to send an indication request to a second target base station adjacent to the first target base station in response to a switching request fed back by a target terminal, the indication request being used to instruct the second target base station to broadcast an initial base station number to the target terminal, receive a first performance index corresponding to the initial base station number fed back by the target terminal, determine a switching strategy according to the first performance index, and send a connection request to the target terminal according to the switching strategy, the connection request being used to instruct the target terminal to establish a communication connection with the second target base station; the first target base station and the second target base station are cluster master base stations or cluster slave base stations belonging to different clusters; The first target base station is specifically configured to determine the switching strategy as a first switching strategy if the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station; the first switching strategy is to instruct the target terminal to directly establish a communication connection with the second target base station; The first target base station is specifically configured to determine the switching strategy as a second switching strategy if the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station affiliated to the second cluster master base station; the second switching strategy is to instruct the target terminal to first establish a communication connection with the second cluster master base station and then switch from the second cluster master base station to the second cluster slave base station; The target terminal is configured to establish a communication connection with the second target base station based on the switching strategy; The second cluster master base station is configured to feed back a target base station number of the second target base station to the target terminal or the first target base station according to the switching strategy.

6. The system of claim 5, wherein, The target terminal is specifically configured to feed back a switching request to the first target base station when a second performance index between the target terminal and the first target base station is lower than a second preset threshold; The target terminal is configured to receive an initial base station number broadcast by a second cluster master base station adjacent to the first target base station, measure a performance of a broadcast beam carrying the initial base station number to obtain a first performance, and feed back the first performance to the first target base station; The target terminal is configured to receive a switching strategy fed back by the first target base station and establish a communication connection with a second target base station based on the switching strategy.

7. The system of claim 5, wherein, The second cluster master base station is specifically configured to determine a target second cluster slave base station according to load states of second cluster slave base stations affiliated to each of the second cluster master base stations when the second cluster master base station does not meet a service demand of the target terminal. The target second cluster is fed back from a base station number of a base station to the target terminal, and the target second cluster is instructed to configure a broadcast beam from the base station as a target broadcast beam corresponding to the second cluster master base station.

8. A low-altitude communication apparatus, characterized by comprising: The device is applied to a first target base station, and the device comprises: A first sending module is configured to send an indication request to a second target base station adjacent to the first target base station in response to a handover request fed back by a target terminal; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal; A decision module is configured to receive a first performance index corresponding to the initial base station number fed back by the target terminal, and determine a handover strategy according to the first performance index; A second sending module is configured to send a connection request to the target terminal according to the handover strategy; the connection request is used to instruct the target terminal to perform a communication connection with the second target base station; the first target base station and the second target base station are cluster master base stations or cluster slave base stations belonging to different clusters; The decision module is specifically configured to determine the handover strategy as a first handover strategy if the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station; the first handover strategy is used to instruct the target terminal to directly perform a communication connection with the second target base station; The handover strategy is determined as a second handover strategy if the first performance index is lower than the first preset threshold and the second target base station is a second cluster slave base station attached to the second cluster master base station; the second handover strategy is used to instruct the target terminal to first perform a communication connection with the second cluster master base station, and then switch from the second cluster master base station to the second cluster slave base station.

9. A base station device, characterized by comprising: comprise: a transmitter, a receiver, a processor and a memory, wherein the memory stores a computer program; the processor is configured to control the transmitter to send an indication request to a second target base station adjacent to a first target base station in response to a handover request fed back by a target terminal; the indication request is used to instruct the second target base station to broadcast an initial base station number to the target terminal; the receiver is configured to receive a first performance index corresponding to the initial base station number fed back by the target terminal under the control of the processor; the processor is configured to determine a handover strategy according to the first performance index; the transmitter is configured to send a connection request to the target terminal according to the handover strategy under the control of the processor; the connection request is used to instruct the target terminal to perform a communication connection with the second target base station; the first target base station and the second target base station are cluster master base stations or cluster slave base stations belonging to different clusters; the processor is specifically configured to determine the handover strategy as a first handover strategy if the first performance index is higher than a first preset threshold or the second target base station is a second cluster master base station; the first handover strategy is used to instruct the target terminal to directly perform a communication connection with the second target base station; If the first performance index is lower than a first preset threshold and the second target base station is a second cluster slave base station affiliated to a second cluster master base station, the handover strategy is determined as a second handover strategy; the second handover strategy indicates that the target terminal first performs communication connection with the second cluster master base station, and then is handed over from the second cluster master base station to the second cluster slave base station.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, when executed by a processor, implements the steps of the method of any one of claims 1-2 or 3-4.

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