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

Abstract

The present application relates to a low-altitude communication method, apparatus, and system, a base station device, and a computer-readable storage medium. 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 a first target base station, the indication request being used for instructing the second target base station to broadcast an initial base station number to the target terminal; receiving a first performance indicator corresponding to the initial base station number fed back by the target terminal, and on the basis of the first performance indicator, determining a handover policy; and, on the basis of the handover policy, sending a connection request to the target terminal, the connection request being used for instructing the target terminal to perform a communication connection with the second target base station.

Description

Low-altitude communication methods, devices, systems, base station equipment, and readable storage media

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on December 27, 2024, application number 2024119549476, entitled "Low-altitude communication method, apparatus, system, base station equipment and readable storage medium", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of mobile communication technology, and in particular to a low-altitude communication method, apparatus, system, base station equipment, and computer-readable storage medium. Background Technology

[0004] With the development of communication network technology, scenarios have emerged where low-altitude networks and ground networks are jointly networked. Ground base stations use low-altitude communication networks to communicate with low-altitude terminals such as drones and low-altitude aircraft.

[0005] In traditional technology, low-altitude base stations are selected within the target area to implement low-altitude communication networks. These base stations employ dual-carrier beams and are configured with both ground-to-ground and air-to-air broadcast beams to meet the service needs of both low-altitude terminals and ground terminals.

[0006] However, in current traditional technologies, when the load on ground users at low-altitude base stations increases, or when the low-altitude base station needs to perform 2CC (2 Component Carriers) or 3CC (3 Component Carriers) carrier aggregation (5G-A or 5G+) according to service requirements, the low-altitude base station mainly serves ground-to-ground services. This leads to service conflicts between the ground network and the low-altitude network, which cannot meet the needs of low-altitude services and thus seriously affects the communication performance of the low-altitude network, resulting in poor communication performance. Summary of the Invention

[0007] Based on this, this application provides a low-altitude communication method, apparatus, system, base station equipment, and computer-readable storage medium.

[0008] In a first aspect, this application provides a low-altitude communication method, the method being applied to a first target base station, comprising:

[0009] In response to a handover request from the 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;

[0010] Receive the first performance index corresponding to the initial base station number fed back by the target terminal, and determine the handover strategy based on the first performance index;

[0011] According to the handover strategy, a connection request is sent to the target terminal, and the connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

[0012] In one embodiment, determining the switching strategy based on the first performance metric includes:

[0013] In response to the first performance indicator being higher than the first preset threshold, the switching strategy is determined as the first switching strategy.

[0014] In one embodiment, determining the switching strategy based on the first performance metric includes:

[0015] In response to the fact that the second target base station is the second cluster master base station, the handover strategy is determined to be the first handover strategy.

[0016] In one embodiment, determining the switching strategy based on the first performance metric further includes:

[0017] In response to the first performance indicator being lower than the first preset threshold and the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined to be the second handover strategy.

[0018] In one embodiment, sending a connection request to the target terminal according to the switching strategy includes:

[0019] If the handover strategy is the first handover strategy, the target base station number of the second target base station sent by the second cluster main base station is added to the connection request sent to the target terminal, instructing the target terminal to establish a communication connection with the second target base station according to the first handover strategy;

[0020] 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, instructing the target terminal to establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station, so that the second cluster master base station can determine the target base station number;

[0021] The communication connection between the target terminal and the second cluster main base station is used to realize the communication connection between the target terminal and the second target base station.

[0022] Secondly, this application provides a low-altitude communication method, which is applied to a target terminal and includes:

[0023] When the second performance index between the target terminal and the first target base station is lower than the second preset threshold, a handover request is sent to the first target base station.

[0024] Receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain a first performance index, and feed the first performance back to the first target base station;

[0025] The system receives a connection request from the first target base station and establishes a communication connection with the second target base station based on the handover strategy in the connection request.

[0026] In one embodiment, establishing a communication connection with the second target base station based on the handover strategy in the connection request includes:

[0027] If the switching strategy is the first switching strategy, a communication connection is established 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;

[0028] If the handover strategy is the second handover strategy, a communication connection is established with the second cluster master base station based on 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 based on the target base station number of the second target base station fed back by the second cluster master base station.

[0029] Thirdly, this application also provides a low-altitude communication device, which is applied to a first target base station and includes:

[0030] The 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 the 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;

[0031] The decision module is used to receive the first performance index corresponding to the initial base station number fed back by the target terminal, and determine the handover strategy based on the first performance index.

[0032] The second sending module sends a connection request to the target terminal according to the handover strategy. The connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

[0033] In one embodiment, the decision module is configured to determine the handover strategy as the first handover strategy in response to the first performance indicator being higher than a first preset threshold or the second target base station being the second cluster master base station;

[0034] In response to the first performance indicator being lower than the first preset threshold and the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined to be the second handover strategy.

[0035] In one embodiment, the second sending module is configured to, 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;

[0036] 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, instructing the target terminal to establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station, so that the second cluster master base station can determine the target base station number;

[0037] The communication connection between the target terminal and the second cluster main base station is used to realize the communication connection between the target terminal and the second target base station.

[0038] Fourthly, this application also provides a low-altitude communication device, which is applied to a target terminal and includes:

[0039] The feedback module is used to send a handover request to the first target base station when the second performance index between the target terminal and the first target base station is lower than the second preset threshold.

[0040] The performance measurement module is used to receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain a first performance index, and feed the first performance back to the first target base station.

[0041] The connection module is used to receive the connection request fed back by the first target base station and establish a communication connection with the second target base station based on the handover strategy in the connection request.

[0042] In one embodiment, the connection module is configured to establish a communication connection with the second target base station based on 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 a first handover strategy.

[0043] If the handover strategy is the second handover strategy, a communication connection is established with the second cluster master base station based on 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 based on the target base station number of the second target base station fed back by the second cluster master base station.

[0044] Fifthly, this application also provides a low-altitude communication system, comprising:

[0045] A first target base station is configured to respond to a handover request from a target terminal by sending an indication request to a second target base station adjacent to the first target base station; the indication request is configured 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 from the target terminal, determine a handover strategy based on the first performance index; and send a connection request to the target terminal according to the handover strategy, the connection request being configured to instruct the target terminal to establish a communication connection with the second target base station.

[0046] The target terminal is used to establish a communication connection with the second target base station based on the handover strategy;

[0047] The second cluster of main base stations is used to feed back the target base station number of the second target base station to the target terminal or the first target base station according to the handover strategy.

[0048] In one embodiment, the target terminal is configured to send a handover request to the first target base station when a second performance indicator between the target terminal and the first target base station is lower than a second preset threshold.

[0049] Receive the initial base station number broadcast by the second cluster of main base stations adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number to obtain the first performance, and feed the first performance back to the first target base station;

[0050] The system receives the handover strategy fed back by the first target base station and establishes a communication connection with the second target base station based on the handover strategy.

[0051] In one embodiment, the second cluster master base station is configured to determine the target second cluster slave base station based on the load status of the second cluster slave base stations attached to each second cluster master base station when the second cluster master base station does not meet the service requirements of the target terminal;

[0052] The base station number of the target second cluster slave base station is fed back to the target terminal, and the target second cluster slave base station is instructed to configure the broadcast beam as the target broadcast beam corresponding to the second cluster master base station.

[0053] Sixthly, this application also provides a base station device, including: a transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program;

[0054] The processor is configured to, in response to a handover request fed back by the target terminal, control the transmitter to send an indication request to a second target base station adjacent to the first target base station; the indication request is configured to instruct the second target base station to broadcast an initial base station number to the target terminal;

[0055] The receiver is configured to receive, under the control of the processor, a first performance indicator corresponding to the initial base station number fed back by the target terminal;

[0056] The processor is used to determine a switching strategy based on the first performance metric;

[0057] The transmitter is used, under the control of the processor, to send a connection request to the target terminal according to the switching strategy. The connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

[0058] In a seventh aspect, this application also provides a communication device, including a transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program;

[0059] The transmitter is configured to, under the control of the processor, send a handover request to the first target base station when the second performance index between the target terminal and the first target base station is lower than the second preset threshold.

[0060] The receiver is configured, under the control of the processor, to receive the initial base station number broadcast by the second target base station adjacent to the first target base station;

[0061] The processor is used to perform performance measurements on the broadcast beam carrying the initial base station number to obtain a first performance index;

[0062] The transmitter is configured to, under the control of the processor, feed back the first performance to the first target base station;

[0063] The receiver is configured to receive a connection request from the first target base station under the control of the processor, and establish a communication connection with the second target base station based on the handover strategy in the connection request.

[0064] Eighthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0065] In response to a handover request from the 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;

[0066] Receive the first performance index corresponding to the initial base station number fed back by the target terminal, and determine the handover strategy based on the first performance index;

[0067] According to the handover strategy, a connection request is sent to the target terminal, and the connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

[0068] Ninthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0069] When the second performance index between the target terminal and the first target base station is lower than the second preset threshold, a handover request is sent to the first target base station.

[0070] Receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain a first performance index, and feed the first performance back to the first target base station;

[0071] The system receives a connection request from the first target base station and establishes a communication connection with the second target base station based on the handover strategy in the connection request. Attached Figure Description

[0072] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0073] Figure 1 shows the application environment of a low-altitude communication method in one embodiment;

[0074] Figure 2 is a flowchart illustrating a low-altitude communication method applied to a first target base station in one embodiment;

[0075] Figure 3 is a schematic diagram of a low-altitude cluster network architecture in one embodiment;

[0076] Figure 4 is a flowchart illustrating the process of determining the switching strategy in one embodiment;

[0077] Figure 5 is a schematic diagram of the process of low-altitude communication performed by the first target base station under different handover strategies in one embodiment;

[0078] Figure 6 is a flowchart illustrating a low-altitude communication method applied to a target terminal in one embodiment;

[0079] Figure 7 is a schematic diagram of the process of low-altitude communication of the target terminal under different handover strategies in one embodiment;

[0080] Figure 8 is a flowchart illustrating an example of a low-altitude communication method in one embodiment;

[0081] Figure 9 is a structural block diagram of a low-altitude communication device applied to a first target base station in one embodiment;

[0082] Figure 10 is a structural block diagram of a low-altitude communication device applied to a target terminal in one embodiment;

[0083] Figure 11 is an internal structure diagram of a computer device in one embodiment. Detailed Implementation

[0084] 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.

[0085] Figure 1 is a schematic diagram of an application scenario of a low-altitude communication method provided in an embodiment of this application. As shown in Figure 1, the 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 a first cluster master base station 101 or any one of a plurality of 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 a second cluster master base station 201 or any one of a plurality of 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 services 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 services 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.

[0086] The first target base station 100 and the second target base station 200 can be base stations (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), base stations (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), evolved Node Bs (eNB or eNodeB) in LTE, relay stations or access points, or base stations in 5G networks, etc., and are not limited here. The target terminal 300 can be a low-altitude terminal, an aviation device operating at a low altitude, mainly including low-altitude aircraft such as drones and small planes.

[0087] Before introducing specific embodiments of the present invention, the technical terms involved in the present invention will be explained:

[0088] CM: Cluster Master, the primary base station responsible for managing and coordinating other base stations within the (low-altitude) cluster. It plays a core role in the low-altitude network, responsible for signal strength monitoring, load management, and handover commands for drones.

[0089] CS: Cluster Slaver, a (low-altitude) cluster slave base station, is a base station belonging to the (low-altitude) cluster master base station and is responsible for providing communication services for drones. They are managed uniformly by the (low-altitude) cluster master base station and execute signal transmission tasks according to instructions.

[0090] UE: User Equipment, refers to equipment operating in low-altitude networks, such as a drone. In this embodiment, UE refers to a drone performing signal measurement and base station handover operations.

[0091] RSRP: Reference Signal Received Power, is a metric for measuring the strength of the received signal in a wireless network. RSRP is used to assess signal quality and determine when to switch base stations.

[0092] SINR: Signal to Interference plus Noise Ratio, is a key indicator for measuring the quality of received signals. SINR is used to assess the reliability of communication links and influences base station selection and handover decisions.

[0093] LOS: Line of Sight, refers to the propagation of signals when there are no obstacles obstructing the path. Under LOS conditions, signal propagation loss is low, and coverage is good.

[0094] HO: Handover, refers to the process by which user equipment (such as drones) switches from one base station to another while in motion. An effective handover mechanism can improve the coverage and service continuity of low-altitude networks.

[0095] In one embodiment, as shown in Figure 2, a low-altitude communication method is provided. Taking the application of this method to the first target base station in Figure 1 as an example, the method includes the following steps:

[0096] Step 202: In response to the handover request fed back by the target terminal, send an indication request to the second target base station adjacent to the first target base station.

[0097] The instruction request is used to instruct the second target base station to broadcast the initial base station number to the target terminal.

[0098] In this embodiment, the current low-altitude communication network is based on the existing 5G+ communication network to cover ground users while also taking into account low-altitude coverage. 3.5G uses dual carriers, with the first carrier (F1 carrier as shown in Figure 3) covering ground users. Since low-altitude coverage is a LOS path, the air-to-ground loss is relatively smaller than the ground propagation loss. Therefore, the spacing between low-altitude base stations is generally set to 3 to 5 times the spacing between ground base stations. Some fixed-location ground base stations (with a spacing of 3 to 5 times that of ground base stations) are set as low-altitude base stations. That is, the second carrier of the low-altitude base station (F2 carrier as shown in Figure 3) is configured with both ground-to-ground and air-to-ground broadcast beams to achieve dynamic sharing of service beams and to cover both ground users and low-altitude UAV users.

[0099] First, as shown in Figure 3, the administrator uses the base station management terminal (i.e., the management terminal of the low-altitude communication system) to transform the ground base stations into a new network architecture including low-altitude cluster master base stations (CMs) and low-altitude cluster slave base stations (CSs). This is achieved by establishing mesh connections between low-altitude cluster master base stations (CMs) and star connections between each CM and its surrounding subordinate low-altitude cluster slave base stations (CSs), forming an efficient low-altitude network structure. Specifically, the administrator can designate the ground base stations (second carriers) currently fixed as low-altitude base stations as low-altitude cluster master base stations (CMs). Each low-altitude cluster master base station (CM) manages one low-altitude cluster and acts as the core node of that cluster. The low-altitude cluster master base station (CM) needs to be configured with both ground-to-ground and air-to-air broadcast beams, forming A:B type (target type) broadcast beams (e.g., 4:3, 5:2, etc.). The low-altitude cluster master base station (CM) needs to possess high processing power and resource management capabilities to support bidirectional communication between ground and air.

[0100] Secondly, the administrator designates the ground base stations (first carriers) surrounding the low-altitude cluster master base station (CM) as low-altitude cluster slave base stations (CS) belonging to the CM. The low-altitude cluster slave base station (CS) is an auxiliary node of the CM, responsible for extending the coverage and capacity of the low-altitude cluster. The low-altitude cluster slave base station (CS) typically does not directly configure broadcast beams to the ground and air; instead, it dynamically configures service beams as needed to provide network services to low-altitude terminals.

[0101] Low-altitude cluster master base station (CM) and low-altitude cluster slave base station (CS) can be distinguished by different identifiers. For example, a 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). A 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). Furthermore, for the intra-cluster relationships of each low-altitude cluster, the low-altitude cluster master base station (CM(i)) and its surrounding low-altitude cluster slave base stations (CS(i, 1), CS(i, 2), ..., CS(i, k)) are connected in a star topology. Each low-altitude cluster slave base station (CS(i, k)) communicates directly 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 relationships of each low-altitude cluster, different low-altitude cluster master base stations (CM(i)) are connected to form 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 handover and resource coordination between low-altitude clusters through the mesh structure. By connecting the low-altitude cluster master base station with its surrounding low-altitude cluster base stations into a star structure, and connecting the low-altitude cluster master base stations with a mesh structure, efficient organization of the network topology is achieved, providing a basis for inter-cluster handover and intra-cluster selection of service-providing base stations.

[0102] This embodiment and the following embodiments use a drone terminal as the target terminal (UE) as an example for illustration, and the first target base station is a base station that provides network services to the drone terminal at its initial position. It can be a first cluster master base station or a first cluster slave base station among the first target base stations. When the drone terminal is flying at low altitude, if the current position of the drone terminal is at the boundary of the service range of the first target base station, the drone terminal measures in real time that the broadcast beam RSRP and / or SINR of the current first target base station does not meet the service requirements of the drone terminal, and the drone terminal sends a handover request to the first target base station. Then, when the first target base station receives the handover request from the drone terminal, it responds to the handover request. If the first target base station is a 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 (the second target base station is the low-altitude cluster adjacent to the first target base station); if the first target base station is a first cluster slave base station, the first target base station responds to the first cluster master base station according to the handover request from the current drone 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.

[0103] Step 204: Receive the first performance index corresponding to the initial base station number fed back by the target terminal, and determine the handover strategy based on the first performance index.

[0104] In this embodiment, after receiving an indication request from 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 responds to the indication request by transmitting a broadcast beam containing its own base station number to the UAV terminal. The self-base station number 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 receiving the first performance index corresponding to each initial base station number fed back by the UAV terminal, the first target base station negotiates and determines a handover strategy with the UAV terminal based on the first performance index. If the first target base station is a first cluster slave base station, the first cluster slave base station feeds back the handover strategy to the first cluster master base station, and then 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 a one-step handover, and the second handover strategy is a two-step handover. If the signal quality of the second target base station, as characterized by the first performance indicator, is good, and the load of the second target base station meets the connection requirements of the UAV terminal, then the first target base station can determine the handover strategy as the first handover strategy; otherwise, it can determine the handover strategy as the second target strategy. Optionally, the handover strategy can also be determined according to the service requirements of the UAV terminal. For example, if the service in the UAV terminal is a high-bandwidth service such as real-time video transmission, the handover strategy negotiation determines the second handover strategy, while low-bandwidth, low-latency sensitive services can be determined as the first handover strategy.

[0105] Step 206: Send a connection request to the target terminal according to the handover strategy.

[0106] The connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

[0107] In this embodiment of the application, the first cluster main base station in the first target base station generates a connection request according to the handover strategy determined through negotiation 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 notify the UAV terminal of the handover strategy used to establish a communication connection with the second target base station.

[0108] After receiving the connection request, the UAV terminal establishes a communication connection with the second target base station according to the negotiated handover strategy. The detailed process of establishing a communication connection between the UAV terminal and the second target base station is described in detail in the following embodiments.

[0109] In the aforementioned low-altitude communication method, the handover request fed back by the target terminal instructs the adjacent second cluster of primary base stations to interact with the target terminal, obtain the first performance index fed back by the target terminal, and determine the handover strategy based on the first performance index. This enables the target terminal to establish a communication connection with the second target base station with stronger communication performance. This solves the problem of service conflicts between the terrestrial network and the low-altitude network in the first target base station. It switches the original first target base station communicating with the target terminal to the second target base station, so that the second target base station can provide low-altitude network services to the target terminal, thereby improving the communication performance and user experience of the low-altitude network.

[0110] In an exemplary embodiment, the handover strategy includes a first handover strategy and a second handover strategy. The first target base station determines the handover strategy suitable for the target terminal based on a first performance indicator between the target terminal and the second target base station and the type of the second target base station, as shown in FIG4. Step 204 includes steps 402 to 404. Wherein:

[0111] Step 402: In response to the first performance indicator being higher than the first preset threshold or the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined as the first handover strategy.

[0112] In this embodiment of the application, the first handover strategy is a one-step handover strategy, that is, the second cluster master base station decides on the second target base station to provide network services to the drone terminal, and feeds back the base station number of the second target base station to the first cluster master base station, and feeds back to the target terminal through the first cluster master base station, instructing the drone terminal to directly establish a communication connection with the second target base station.

[0113] When the first performance index of the broadcast beam carrying the initial base station number measured by the UAV terminal is higher than the first preset threshold, it indicates that the signal quality between the UAV terminal and the second target base station is high. In this case, the UAV terminal can directly establish a communication connection with the second target base station, reducing handover latency during the handover process. Alternatively, if the second target base station responds to the instruction request of the first target base station and the second target base station transmitting the broadcast beam carrying the initial base station number is the second cluster master base station, it indicates that the current load of the second cluster master base station is relatively light and can support low-altitude service. The UAV terminal can directly establish a communication connection with the second cluster master base station. In this case, the first cluster master base station in the first target base station determines the handover strategy as a one-step handover, i.e., the first handover strategy.

[0114] Step 404: In response to the first performance indicator being lower than the first preset threshold and the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined to be the second handover strategy.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] In an exemplary embodiment, as shown in FIG5, step 206 includes steps 502 to 504. Wherein:

[0119] 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.

[0120] In this embodiment, when the handover strategy is the first handover strategy, the first cluster master base station in the first target base station indicates the handover strategy to the second cluster master base station. Then, the second cluster master base station uses its own base station number or the base station number of the selected best second cluster slave base station as the target base station number and feeds back the target base station number to the first cluster master base station. Additionally, if the first target base station providing service to the drone 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 drone terminal. Then, the first target base station adds the target base station number to the connection request and sends the connection request to the drone terminal, instructing the target terminal to establish a communication connection with the second target base station according to the first handover strategy. Simultaneously, after the first target base station indicates the first handover strategy to the second cluster master base station, the second cluster master base station broadcasts according to a preset beam configuration (including A:B type aggregated carriers for ground service and low-altitude service). If the second target base station to be provided with service is a second cluster slave base station, the second cluster master base station instructs the second cluster slave base station to also broadcast according to the preset beam configuration.

[0121] Step 504: If the handover strategy is the second handover strategy, add the base station number of the second cluster master base station to the connection request sent to the target terminal, instructing the target terminal to establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station, so that the second cluster master base station can determine the target base station number.

[0122] The communication connection between the target terminal and the second cluster of main base stations is used to realize the communication connection between the target terminal and the second target base station.

[0123] In this embodiment of the application, when the handover strategy is the first handover strategy, the first cluster master base station in the first target base station indicates to the second cluster master base station that the handover strategy is the first handover strategy. 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 UAV terminal, instructing the UAV terminal to first establish a communication connection with the second cluster master base station so that the second cluster master base station can determine the target base station number.

[0124] In this embodiment, by using a first handover strategy and a second handover strategy, the first target base station providing services to the target terminal is switched to the second target base station, which effectively reduces the service conflict between the ground network and the low-altitude network, improves the efficiency of spectrum resource utilization and network coverage, and significantly reduces the handover latency through a flexible handover mechanism, thus ensuring the communication performance of the UAV terminal in complex airspace environments.

[0125] In one embodiment, as shown in Figure 6, a low-altitude communication method is provided. Taking the application of this method to the target terminal in Figure 1 as an example, the method includes the following steps:

[0126] Step 602: When the second performance index between the target terminal and the first target base station is lower than the second preset threshold, a handover request is sent to the first target base station.

[0127] In this embodiment of the application, the UAV terminal is used as the target terminal (UE) as an example for illustration. During the flight of the UAV terminal, the broadcast beam of the first target base station currently providing services is measured in real time to obtain the RSRP and / or SINR of the broadcast beam, which serves as the second performance indicator between the target terminal and the first target base station. When the second performance indicator is lower than the second preset threshold, it indicates that the communication quality of the current service is poor. Then, the UAV terminal sends a handover request to the first target base station, requesting to switch the original first target base station providing network services to other base stations with better communication quality.

[0128] Step 604: Receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain the first performance index, and feed the first performance back to the first target base station.

[0129] In this embodiment, the first target base station sends an indication request to the second target base station adjacent to it, following the same process as described in step 202. The processing flow of the first target base station will not be repeated in this embodiment. Then, the second target base station sends a broadcast beam containing its own base station number to the UAV terminal.

[0130] The UAV terminal receives and measures the broadcast beam transmitted by the second target base station. The broadcast beam transmitted by the second target base station may be the base station number of the second low-altitude cluster master base station, or it may be the broadcast beam of one or more second low-altitude cluster slave base stations. Then, the UAV terminal obtains the signal strength RSRP and / or signal-to-interference-plus-noise ratio SINR of the broadcast beam and feeds it back to the first target base station.

[0131] Step 606: Receive the connection request from the first target base station, and establish a communication connection with the second target base station based on the handover strategy in the connection request.

[0132] In this embodiment, the first target base station receives the connection request and sends it back to the UAV terminal following the same steps as described in step 204. The processing flow of the first target base station will not be repeated in this embodiment. After receiving the connection request from the first target base station, the UAV terminal determines the handover strategy in the connection request and establishes a communication connection with the second target base station according to the handover strategy.

[0133] In this embodiment, by monitoring the second performance index of the UAV terminal and the current serving base station, a handover request is triggered when the performance index is lower than the second performance index. Then, the first performance index corresponding to the broadcast beam of the adjacent second target base station is measured. Based on the measurement results and the base station load, the base station is switched according to the handover strategy indicated by the first target base station. Communication connection is established based on the second target base station after the handover. This effectively solves the service conflict between the ground network and the low-altitude network and improves the network performance and user experience in low-altitude communication scenarios.

[0134] In an exemplary embodiment, as shown in FIG7, step 606 includes steps 702 to 704. Wherein:

[0135] Step 702: If the handover strategy is the first handover strategy, establish a 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.

[0136] In this embodiment, when the handover strategy carried in the connection request fed back by the first target base station is the first handover strategy, the connection request also includes the target base station number of the second target base station to be provided with service. The UAV terminal establishes a communication connection with the second target base station through the target base station number. The second target base station can be a second cluster master base station or a second cluster slave base station.

[0137] Step 704: If the handover strategy is the second handover strategy, establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station in the connection request sent by the first target base station, and establish a communication connection with the second target base station based on the target base station number of the second target base station fed back by the second cluster master base station.

[0138] In this embodiment, when the handover strategy carried in the connection request fed back by the first target base station is the second handover strategy, the connection request includes the base station number of the second cluster master base station. The UAV terminal establishes a communication connection with the second cluster master base station based on the base station number of the second cluster master base station. At this time, the serving base station of the UAV terminal switches to the second cluster master base station. Then, the second cluster master base station determines the second cluster slave base station providing services to the UAV terminal based on the load status of each second cluster slave base station, and uses the base station number of the second cluster slave base station as the target base station number, sending this target base station number to the UAV terminal via signaling. Finally, the UAV terminal establishes a communication connection with the second target base station based on the target base station number fed back by the second cluster master base station, wherein the second target base station is the second cluster slave base station corresponding to the target base station number.

[0139] In this embodiment, a high-performance, low-latency low-altitude network handover is achieved through a handover strategy, which effectively resolves the service conflict between the terrestrial network and the low-altitude network, improves network performance and user experience, optimizes the utilization of base station resources, reduces interference, and improves the communication performance between the target terminal and the second target terminal.

[0140] In one exemplary embodiment, a low-altitude communication system is provided, the system comprising:

[0141] The first target base station is configured to respond to a handover request from the target terminal by sending an indication request to the second cluster master base station adjacent to the first target base station; the indication request is configured 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 the beam broadcast by the initial base station number from the target terminal, and determine a handover strategy based on the first performance index; and send a connection request to the target terminal according to the handover strategy, the connection request being configured to instruct the target terminal to establish a communication connection with the second target base station through the second cluster master base station.

[0142] The target terminal is used to establish a communication connection with the second target base station based on a handover strategy.

[0143] The second cluster of primary base stations is used to feed back the target base station number of the second target base station to the target terminal or the first target base station according to the handover strategy.

[0144] In this embodiment of the application, when the handover strategy is the first handover strategy, the second cluster master base station feeds back the target base station number of the second target base station to the first cluster master base station in the first target base station; when the handover strategy is the second handover strategy, the second cluster master base station directly connects with the target terminal and feeds back the target base station number to the target terminal.

[0145] In an exemplary embodiment, the target terminal is configured to send a handover request to the first target base station when a second performance indicator between the target terminal and the first target base station is lower than a second preset threshold.

[0146] The system receives the initial base station number broadcast by the second cluster of primary base stations adjacent to the first target base station, performs performance measurement on the broadcast beam carrying the initial base station number to obtain the first performance, and feeds back the first performance to the first target base station; it also receives the handover strategy fed back by the first target base station and establishes a communication connection with the second target base station based on the handover strategy.

[0147] In an exemplary embodiment, the second cluster master base station is configured to determine the target second cluster slave base station based on the load status of the second cluster slave base stations attached to each second cluster master base station when the second cluster master base station does not meet the service requirements of the target terminal; feed back the 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 the broadcast beam as the target broadcast beam corresponding to the second cluster master base station.

[0148] In this embodiment, after receiving the instruction request sent by the first cluster main base station, the second cluster main base station detects its own load. If the load status of the second cluster main base station meets the service requirements of the UAV terminal, the second cluster main base station feeds back to the UAV terminal through the first target base station according to its own base station number. If the load status of the second cluster main base station does not meet the service requirements of the UAV terminal, the second cluster main 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 main base station belongs, based on the query results of historical or real-time queries, and feeds back the base station number of the second target base station to the UAV terminal through the first target base station. At the same time, the second cluster main base station in the second target base station instructs the second cluster slave base station to dynamically configure the broadcast beam of the same target type (A:B) as the second cluster main base station.

[0149] In an exemplary embodiment, as shown in FIG8, an example of a low-altitude communication method is provided, which is applied to a low-altitude communication system and includes:

[0150] Step 801: Configure the ground base station (second carrier) as the low-altitude cluster master base station (CM), and configure the ground base station's broadcast beams to the ground and to the air as type A:B, and configure real-time dynamic sharing of service beams.

[0151] Step 802: Configure a mesh structure between the low-altitude cluster master base stations (CM); configure the base stations around the low-altitude master base stations (CM) as low-altitude cluster slave base stations (CS) to form a star structure with the low-altitude cluster master base stations (CM).

[0152] Step 803: Initialization process for low-altitude cluster master base station and low-altitude cluster slave base station, etc.

[0153] Step 804: When the UAV measures at the low-altitude inter-cluster boundary that the RSRP or SINR of the currently serving low-altitude cluster from (or the primary) CS(j, m) (or CM(j)) base station is lower than the corresponding threshold value, it initiates a low-space handover request.

[0154] Step 805: After receiving the inter-cluster handover request, the adjacent low-altitude cluster master base station CM(i) checks its own load status. If its own load is light, it directly notifies the UAV to switch to the low-altitude cluster master base station CM(i). If its own load is heavy, it checks the load status of all slave base stations in that low-altitude region, selects one or more slave base stations with light loads (CS(i,k)) and dynamically configures their broadcast beams into A:B type broadcast beams for both ground and air communication.

[0155] Step 806: The selected low-altitude cluster master or slave base station number is notified to the UAV. The UAV performs RSRP or (and) SINR measurements on the received low-altitude cluster master or slave base station and reports the results.

[0156] Step 807: The current serving base station negotiates a handover strategy based on the RSRP or (and) SINR values ​​of the adjacent low-altitude cluster master or slave base stations measured and reported by the UAV: ​​Two-step handover: The UAV first switches from the current base station to the target master base station, and then the target master base station determines whether to switch to the best slave base station; One-step handover: The target master base station transmits the best slave base station information to the UAV through the current base station, and the UAV directly switches to the target slave base station.

[0157] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0158] Based on the same inventive concept, this application also provides a low-altitude communication device for implementing the low-altitude communication method described above. The solution provided by this device is similar to the solution described in the above method; therefore, the specific limitations in one or more low-altitude communication device embodiments provided below can be found in the limitations of the low-altitude communication method described above, and will not be repeated here.

[0159] In an exemplary embodiment, as shown in FIG9, a low-altitude communication device 900 is provided. This device 900 is applied to a first target base station and includes: a first transmitting module 901, a decision module 902, and a second transmitting module 903, wherein:

[0160] The first sending module 901 is used 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 the target terminal; the indication request is used to instruct the second target base station to broadcast the initial base station number to the target terminal;

[0161] Decision module 902 is used to receive the first performance index corresponding to the initial base station number fed back by the target terminal, and determine the handover strategy based on the first performance index;

[0162] The second sending module 903 sends a connection request to the target terminal according to the handover strategy. The connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

[0163] In one embodiment, the decision module 902 is configured to determine the handover strategy as the first handover strategy in response to a first performance indicator being higher than a first preset threshold or a second target base station being the second cluster master base station.

[0164] In response to the first performance indicator being lower than the first preset threshold and the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined to be the second handover strategy.

[0165] In one embodiment, the second sending module 903 is configured to, in response to a handover strategy of 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 and send it to the target terminal, instructing the target terminal to establish a communication connection with the second target base station according to the first handover strategy;

[0166] 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, instructing the target terminal to establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station, so that the second cluster master base station can determine the target base station number;

[0167] The communication connection between the target terminal and the second cluster of main base stations is used to realize the communication connection between the target terminal and the second target base station.

[0168] In an exemplary embodiment, as shown in FIG10, a low-altitude communication device 1000 is also provided. This device 1000 is applied to a first target base station and includes: a feedback module 1001, a performance measurement module 1002, and a connection module 1003, wherein:

[0169] Feedback module 1001 is used to send a handover request to the first target base station when the second performance index between the target terminal and the first target base station is lower than the second preset threshold.

[0170] The performance measurement module 1002 is used to receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain the first performance index, and feed the first performance back to the first target base station.

[0171] The connection module 1003 is used to receive the connection request fed back by the first target base station and establish a communication connection with the second target base station based on the handover strategy in the connection request.

[0172] In one embodiment, the connection module 1003 is configured to establish a communication connection with the second target base station based on 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.

[0173] If the handover strategy is the second handover strategy, a communication connection is established with the second cluster master base station based on 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 based on the target base station number of the second target base station fed back by the second cluster master base station.

[0174] Each module in the aforementioned low-altitude communication device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the memory of a computer device as software, so that the processor can call and execute the operations corresponding to each module.

[0175] Figure 11 is a schematic diagram of the structure of a base station device provided in an embodiment of the present invention. The base station device 1100 shown in Figure 11 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 via a bus system 1105. It is understood that the bus system 1105 is used to realize the connection and communication between these components. In addition to a data bus, the bus system 1105 also includes a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 1105 in Figure 2. Furthermore, in this embodiment of the present invention, a transceiver 1106 is also included. The transceiver may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium.

[0176] It is understood that the memory 1102 in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1102 of the systems and methods described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0177] In some implementations, memory 1102 stores elements such as executable modules or data structures, or subsets thereof, or extended sets thereof: operating system 11021. Operating system 11021 includes various system programs, such as a framework layer, core library layer, driver layer, etc., used to implement various basic business functions and handle hardware-based tasks.

[0178] In this embodiment of the invention, by calling the program or instructions stored in the memory 1102, the processor is configured to, in response to a handover request fed back by the target terminal, control the transmitter to 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; the receiver is configured to receive a first performance index corresponding to the initial base station number fed back by the target terminal; the processor is configured to determine a handover strategy based on the first performance index; and the transmitter is configured to send a connection request to the target terminal according to the handover strategy, the connection request being used to instruct the target terminal to establish a communication connection with the second target base station.

[0179] The methods disclosed in the above embodiments of the present invention, in part or in all of them, can also be applied to processor 1101, implemented by processor 1101, or implemented by processor 1101 in conjunction with other components (e.g., transceivers). Processor 1101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above methods can be completed by the integrated logic circuit of the hardware in processor 1101 or by instructions in the form of software. The processor 1101 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 1102. Processor 1101 reads the information in memory 1102 and, in conjunction with its hardware, completes the steps of the above method.

[0180] It is understood that the embodiments described in this invention can be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application, or combinations thereof.

[0181] For software implementation, the technology described in the embodiments of the present invention can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described in the embodiments of the present invention. The software code can be stored in memory and executed by processor 1101. The memory can be implemented in processor 1101 or external to processor 1101.

[0182] In one embodiment, the processor is configured to determine the handover strategy as the first handover strategy in response to the first performance indicator being higher than a first preset threshold or the second target base station being the second cluster master base station.

[0183] In response to the first performance indicator being lower than the first preset threshold and the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined to be the second handover strategy.

[0184] In one embodiment, the transmitter is configured to, if the handover strategy is a 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, instructing the target terminal to establish a communication connection with the second target base station according to the first handover strategy.

[0185] 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, instructing the target terminal to establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station, so that the second cluster master base station can determine the target base station number;

[0186] The communication connection between the target terminal and the second cluster of main base stations is used to realize the communication connection between the target terminal and the second target base station.

[0187] Those skilled in the art will understand that the structure shown in Figure 11 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0188] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0189] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0190] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0191] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A low-altitude communication method, the method being applied to a first target base station, the method comprising: In response to the handover request fed back by the target terminal, an indication request is sent to the second target base station adjacent to the first target base station; The instruction request is used to instruct the second target base station to broadcast the 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, and determine the handover strategy based on the first performance index; According to the handover strategy, a connection request is sent to the target terminal, and the connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

2. The method according to claim 1, wherein, The step of determining the switching strategy based on the first performance indicator includes: In response to the first performance indicator being higher than the first preset threshold, the switching strategy is determined as the first switching strategy.

3. The method according to claim 1, wherein, The step of determining the switching strategy based on the first performance indicator includes: In response to the fact that the second target base station is the second cluster master base station, the handover strategy is determined to be the first handover strategy.

4. The method according to claim 2 or 3, wherein, The step of determining the switching strategy based on the first performance indicator further includes: In response to the first performance indicator being lower than the first preset threshold and the second target base station being a second cluster slave base station attached to the second cluster master base station, the handover strategy is determined to be the second handover strategy.

5. The method according to claim 1, wherein, Sending a connection request to the target terminal according to the switching strategy includes: If the handover strategy is the first handover strategy, the target base station number of the second target base station sent by the second cluster main base station is added to the connection request sent to the target terminal, instructing the target terminal to establish a communication connection with the second target base station according to the first handover strategy; 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, instructing the target terminal to establish a communication connection with the second cluster master base station based on the base station number of the second cluster master base station, so that the second cluster master base station can determine the target base station number; The communication connection between the target terminal and the second cluster main base station is used to realize the communication connection between the target terminal and the second target base station.

6. A low-altitude communication method, the method being applied to a target terminal, the method comprising: When the second performance index between the target terminal and the first target base station is lower than the second preset threshold, a handover request is sent to the first target base station. Receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain a first performance index, and feed the first performance back to the first target base station; The system receives a connection request from the first target base station and establishes a communication connection with the second target base station based on the handover strategy in the connection request.

7. The method according to claim 6, wherein, The step of establishing a communication connection with the second target base station based on the handover strategy in the connection request includes: If the switching strategy is the first switching strategy, a communication connection is established 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 second handover strategy, a communication connection is established with the second cluster master base station based on 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 based on the target base station number of the second target base station fed back by the second cluster master base station.

8. A low-altitude communication system, the system comprising: The first target base station is used to send an indication request to the second target base station adjacent to the first target base station in response to the handover request fed back by the target terminal. The instruction request is used to instruct the second target base station to broadcast the initial base station number to the target terminal; The system receives a first performance indicator corresponding to the initial base station number fed back by the target terminal, determines a handover strategy based on the first performance indicator, and sends a connection request to the target terminal according to the handover strategy. The connection request is used to instruct the target terminal to establish a communication connection with the second target base station. The target terminal is used to establish a communication connection with the second target base station based on the handover strategy; The second cluster of main base stations is used to feed back the target base station number of the second target base station to the target terminal or the first target base station according to the handover strategy.

9. The system according to claim 8, wherein, The target terminal is configured to send a handover request to the first target base station when the second performance index between the target terminal and the first target base station is lower than the second preset threshold. Receive the initial base station number broadcast by the second cluster of main base stations adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number to obtain the first performance, and feed the first performance back to the first target base station; The system receives the handover strategy fed back by the first target base station and establishes a communication connection with the second target base station based on the handover strategy.

10. The system according to claim 8, wherein, The second cluster master base station is configured to determine the target second cluster slave base station based on the load status of the second cluster slave base stations attached to each second cluster master base station when the second cluster master base station does not meet the service requirements of the target terminal. The base station number of the target second cluster slave base station is fed back to the target terminal, and the target second cluster slave base station is instructed to configure the broadcast beam as the target broadcast beam corresponding to the second cluster master base station.

11. A low-altitude communication device, the device being applied to a first target base station, the device comprising: The first sending module is used 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 the target terminal. The instruction request is used to instruct the second target base station to broadcast the initial base station number to the target terminal; The decision module is used to receive the first performance index corresponding to the initial base station number fed back by the target terminal, and determine the handover strategy based on the first performance index. The second sending module sends a connection request to the target terminal according to the handover strategy. The connection request is used to instruct the target terminal to establish a communication connection with the second target base station.

12. A low-altitude communication device, the device being applied to a target terminal, the device comprising: The feedback module is used to send a handover request to the first target base station when the second performance index between the target terminal and the first target base station is lower than the second preset threshold. The performance measurement module is used to receive the initial base station number broadcast by the second target base station adjacent to the first target base station, perform performance measurement on the broadcast beam carrying the initial base station number, obtain a first performance index, and feed the first performance back to the first target base station. The connection module is used to receive the connection request fed back by the first target base station and establish a communication connection with the second target base station based on the handover strategy in the connection request.

13. A base station device, comprising: A transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program; The processor is configured to, in response to a handover request fed back by the target terminal, control the transmitter to send an indication request to a second target base station adjacent to the first target base station; the indication request is configured to instruct the second target base station to broadcast an initial base station number to the target terminal; The receiver is configured to receive, under the control of the processor, a first performance indicator corresponding to the initial base station number fed back by the target terminal; The processor is configured to determine a switching strategy based on the first performance metric. 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 establish a communication connection with the second target base station.

14. A communication device comprising a transmitter, a receiver, a processor, and a memory, wherein the memory stores a computer program; The transmitter is configured to, under the control of the processor, send a handover request to the first target base station when the second performance index between the target terminal and the first target base station is lower than the second preset threshold. The receiver is configured to receive, under the control of the processor, the initial base station number broadcast by the second target base station adjacent to the first target base station; The processor is used to perform performance measurements on the broadcast beam carrying the initial base station number to obtain a first performance index; The transmitter is configured to, under the control of the processor, feed back the first performance to the first target base station; The receiver is configured to receive a connection request from the first target base station under the control of the processor, and establish a communication connection with the second target base station based on the handover strategy in the connection request.

15. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 5 or 6 to 7.

Images