Low-altitude communication method and device, communication equipment, readable storage medium and program product

Abstract

The application relates to a low-altitude communication method and device, communication equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: a first cluster master base station receives an inter-cluster handover request forwarded by a second cluster master base station; in the case that the first cluster master base station itself does not meet the service requirements corresponding to the inter-cluster handover request, a target cluster slave base station is controlled to send a low-altitude service beam for a user equipment, the target cluster slave base station is a cluster slave base station meeting the service requirements in a low-altitude cluster to which the first cluster master base station belongs; first base station information of the first cluster master base station and second base station information of the target cluster slave base station are sent to the user equipment through the second cluster master base station, the first base station information is used for instructing the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and the second base station information is used for instructing the user equipment to access a low-altitude service beam to perform service data communication. The method can improve the low-altitude communication performance.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of wireless communication technology, the joint networking mode of low-altitude network and ground network not only widens the coverage of the communication network, but also significantly improves the flexibility and diversity of communication services. In the scenario of joint networking of low-altitude network and ground network, low-altitude terminals such as unmanned aerial vehicles, low-altitude aircrafts and other user equipment are not only applied to logistics distribution, but also applied to weather monitoring, agricultural patrol, emergency communication and rescue operations, etc. These applications not only improve the work efficiency, but also reduce the labor cost, which has important significance for promoting social progress and economic development.

[0003] However, there are conflicts and interferences between ground services and low-altitude services in terms of spectrum resources, communication channels, etc., which will cause the signal quality of low-altitude network to decrease significantly, affect the data transmission rate and reliability, and reduce the low-altitude communication performance. SUMMARY

[0004] Therefore, it is necessary to provide a low-altitude communication method, device, communication equipment, system, computer readable storage medium and computer program product capable of improving the low-altitude communication performance in view of the above technical problems.

[0005] In a first aspect, the present application provides a low-altitude communication method applied to a first cluster master base station, comprising:

[0006] receiving an inter-cluster handover request forwarded by a second cluster master base station, the inter-cluster handover request being sent by a user equipment to the second cluster master base station;

[0007] in a case that the first cluster master base station itself does not meet the service requirement of the inter-cluster handover request, controlling a target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station meeting the service requirement in a low-altitude cluster to which the first cluster master base station belongs;

[0008] sending first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the user equipment through the second cluster master base station, the first base station information being used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station for control signal communication, and the second base station information being used to instruct the user equipment to access the low-altitude service beam for service data communication.

[0009] In a second aspect, the present application further provides a low-altitude communication device applied to a first cluster master base station, comprising:

[0010] The cluster inter-switching request receiving module is configured to receive a cluster inter-switching request forwarded by the second cluster master base station, the cluster inter-switching request being sent by the user equipment to the second cluster master base station;

[0011] The service beam configuration module is configured to, in a case where the first cluster master base station itself does not meet the service requirement corresponding to the cluster inter-switching request, control the target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and meeting the service requirement;

[0012] The base station information sending module is configured to send first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the user equipment through the second cluster master base station, the first base station information being used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and the second base station information being used to instruct the user equipment to access a low-altitude service beam to perform service data communication.

[0013] In a third aspect, the present application further provides a communication device. The communication device comprises a memory and a processor, the memory stores a computer program, and the processor implements the steps of the above low-altitude communication method when executing the computer program.

[0014] In a fourth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program implements the steps of the above low-altitude communication method when executed by a processor.

[0015] In a fifth aspect, the present application further provides a computer program product. The computer program product comprises a computer program, and the computer program implements the steps of the above low-altitude communication method when executed by a processor.

[0016] The low-altitude communication method, device, communication equipment, computer readable storage medium and computer program product, the first cluster master base station receives the inter-cluster handover request sent by the user equipment through the second cluster master base station, in the case that the first cluster master base station itself does not meet the service requirement of the inter-cluster handover request, the target cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs and which meets the service requirement of the inter-cluster handover request sends a low-altitude service beam for the user equipment, and the first base station information of the first cluster master base station and the second base station information of the target cluster slave base station are sent to the user equipment through the second cluster master base station, so that the user equipment accesses the low-altitude control beam sent by the first cluster master base station for control signal communication through the first base station information, and accesses the low-altitude service beam for service data communication through the second base station information. In the low-altitude communication process, the low-altitude control beam and the low-altitude service beam in the low-altitude cluster are separated in the case that the first cluster master base station itself does not meet the service requirement, and are sent by the first cluster master base station and the target cluster slave base station in the same low-altitude cluster, respectively, which can reduce the frequent switching of the control beam, reduce the service conflict between the low-altitude network and the ground network, ensure the low-altitude network signal quality, and thus improve the low-altitude communication performance.

[0017] In a sixth aspect, the present application provides a low-altitude communication method applied to a user equipment, comprising:

[0018] In the case that the low-altitude cluster handover trigger condition is met, sending an inter-cluster handover request to a first cluster master base station through a second cluster master base station currently performing low-altitude communication;

[0019] In the case that the first base station information and the second base station information sent by the first cluster master base station through the second cluster master base station are received, accessing a low-altitude control beam sent by the first cluster master base station for control signal communication, and accessing a low-altitude service beam sent by a target cluster slave base station for service data communication;

[0020] The first base station information is the base station information of the first cluster master base station, the second base station information is the base station information of the target cluster slave base station, and the target cluster slave base station is a cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs and which meets the service requirement of the inter-cluster handover request.

[0021] In a seventh aspect, the present application further provides a low-altitude communication device applied to a user equipment, comprising:

[0022] An inter-cluster handover request sending module, configured to send an inter-cluster handover request to a first cluster master base station through a second cluster master base station currently performing low-altitude communication in the case that a low-altitude cluster handover trigger condition is met;

[0023] The beam access module is configured to, in a case where the first cluster master base station sends first base station information and second base station information to the second cluster master base station, access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and access a low-altitude service beam sent by the target cluster slave base station to perform service data communication.

[0024] The first base station information is base station information of the first cluster master base station, and the second base station information is base station information of the target cluster slave base station. The target cluster slave base station is a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and that meets a corresponding service requirement of the inter-cluster handover request.

[0025] In an eighth aspect, the present application further provides a communication device. The communication device includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the steps of the above low-altitude communication method are implemented.

[0026] In a ninth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the above low-altitude communication method are implemented.

[0027] In a tenth aspect, the present application further provides a computer program product. The computer program product includes a computer program. When the computer program is executed by a processor, the steps of the above low-altitude communication method are implemented.

[0028] The above low-altitude communication method, device, communication device, computer readable storage medium, and computer program product, in a case where a low-altitude cluster handover trigger condition is met, a user equipment sends an inter-cluster handover request to a first cluster master base station through a second cluster master base station currently performing low-altitude communication, in a case where the first cluster master base station sends first base station information of the first cluster master base station and second base station information of a target cluster slave base station to the second cluster master base station, the user equipment accesses a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and accesses a low-altitude service beam sent by the target cluster slave base station to perform service data communication. In a low-altitude communication process, in a case where the first cluster master base station itself does not meet a service requirement, the low-altitude control beam and the low-altitude service beam in a low-altitude cluster are separated and sent by the first cluster master base station and the target cluster slave base station in the same low-altitude cluster, respectively, which can reduce frequent switching of control beams, reduce service conflicts between a low-altitude network and a ground network, ensure low-altitude network signal quality, and thus improve low-altitude communication performance.

[0029] In an eleventh aspect, the present application provides a low-altitude communication method applied to a second cluster master base station, including:

[0030] Receiving an inter-cluster handover request sent by a user equipment, and forwarding the inter-cluster handover request to a first cluster master base station;

[0031] receiving the first base station information and the second base station information sent by the first cluster master base station, and forwarding the first base station information and the second base station information to the user equipment;

[0032] The first base station information is base station information of the first cluster master base station, and the first base station information is used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication. The second base station information is base station information of a target cluster slave base station, and the second base station information is used to instruct the user equipment to access a low-altitude service beam sent by the target cluster slave base station to perform service data communication. The target cluster slave base station is a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and that meets a corresponding service requirement of the inter-cluster handover request.

[0033] In a twelfth aspect, the present application further provides a low-altitude communication device applied to a second cluster master base station, comprising:

[0034] The inter-cluster handover request forwarding module is configured to receive an inter-cluster handover request sent by the user equipment, and forward the inter-cluster handover request to the first cluster master base station.

[0035] The base station information forwarding module is configured to receive first base station information and second base station information sent by the first cluster master base station in response to the inter-cluster handover request, and forward the first base station information and the second base station information to the user equipment.

[0036] The first base station information is base station information of the first cluster master base station, and the first base station information is used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication. The second base station information is base station information of a target cluster slave base station, and the second base station information is used to instruct the user equipment to access a low-altitude service beam sent by the target cluster slave base station to perform service data communication. The target cluster slave base station is a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and that meets a corresponding service requirement of the inter-cluster handover request.

[0037] In a thirteenth aspect, the present application further provides a communication device. The communication device comprises a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the steps of the above low-altitude communication method are implemented.

[0038] In a fourteenth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program. When the computer program is executed by a processor, the steps of the above low-altitude communication method are implemented.

[0039] In a fifteenth aspect, the present application further provides a computer program product. The computer program product comprises a computer program. When the computer program is executed by a processor, the steps of the above low-altitude communication method are implemented.

[0040] The low-altitude communication method, device, communication equipment, computer readable storage medium and computer program product, the second cluster master base station forwards the inter-cluster handover request sent by the user equipment to the first cluster master base station, and forwards the first base station information and the second base station information sent by the first cluster master base station to the user equipment, so that the user equipment accesses the low-altitude control beam sent by the first cluster master base station for control signal communication through the first base station information, and accesses the low-altitude service beam for service data communication through the second base station information. In the low-altitude communication process, the low-altitude control beam and the low-altitude service beam in the low-altitude cluster are separated in the case that the first cluster master base station itself does not meet the service requirement, and are sent by the first cluster master base station and the target cluster slave base station in the same low-altitude cluster, respectively, so that the control beam frequent switching is reduced, the service conflict between the low-altitude network and the ground network is reduced, the low-altitude network signal quality is ensured, and the low-altitude communication performance is improved.

[0041] In a sixteenth aspect, the application further provides a low-altitude communication system, comprising a user equipment, a first cluster master base station and a second cluster master base station, wherein:

[0042] The user equipment is configured to send an inter-cluster handover request to the second cluster master base station in the case that a low-altitude cluster handover trigger condition is met.

[0043] The second cluster master base station is configured to forward the inter-cluster handover request to the first cluster master base station.

[0044] The first cluster master base station is configured to receive the inter-cluster handover request forwarded by the second cluster master base station, and control a target cluster slave base station to send a low-altitude service beam for the user equipment in the case that the first cluster master base station itself does not meet a service requirement corresponding to the inter-cluster handover request, the target cluster slave base station being a cluster slave base station meeting the service requirement in a low-altitude cluster to which the first cluster master base station belongs; and send first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the second cluster master base station.

[0045] The second cluster master base station is further configured to receive the first base station information and the second base station information sent by the first cluster master base station, and forward the first base station information and the second base station information to the user equipment.

[0046] The user equipment is further configured to receive the first base station information and the second base station information forwarded by the second cluster master base station, access a low-altitude control beam sent by the first cluster master base station for control signal communication, and access a low-altitude service beam for service data communication.

[0047] The low-altitude communication system, when the user equipment meets the low-altitude cluster switching trigger condition, forwards the inter-cluster switching request to the first cluster master base station through the second cluster master base station, and when the user equipment does not meet the service requirement corresponding to the inter-cluster switching request, the first cluster master base station controls the target cluster slave station in the low-altitude cluster to send the low-altitude service beam for the user equipment, and sends the first base station information of the first cluster master base station and the second base station information of the target cluster slave station to the user equipment through the second cluster master base station, so that the user equipment accesses the low-altitude control beam sent by the first cluster master base station for control signal communication, and accesses the low-altitude service beam for service data communication. In the low-altitude communication process, the low-altitude control beam and the low-altitude service beam in the low-altitude cluster are separated when the first cluster master base station itself does not meet the service requirement, and are sent by the first cluster master base station and the target cluster slave station in the same low-altitude cluster, which can reduce the frequent switching of control beams, reduce the service conflict between the low-altitude network and the ground network, ensure the low-altitude network signal quality, and improve the low-altitude communication performance. BRIEF DESCRIPTION OF DRAWINGS

[0048] 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 for those skilled in the art, other related drawings can also be obtained without creative labor.

[0049] Figure 1 An application environment diagram of the low-altitude communication method in an embodiment;

[0050] Figure 2 A flowchart of the low-altitude communication method in an embodiment;

[0051] Figure 3 A timing diagram of the low-altitude communication method in an embodiment;

[0052] Figure 4 A flowchart of controlling the sending of low-altitude service beams in an embodiment;

[0053] Figure 5 A timing diagram of the low-altitude communication method in another embodiment;

[0054] Figure 6 A flowchart of the low-altitude communication method in another embodiment;

[0055] Figure 7 A flowchart of the low-altitude communication method in another embodiment;

[0056] Figure 8 A schematic diagram of the architecture of a conventional low-altitude communication system;

[0057] Figure 9 a schematic diagram of an architecture of a low-altitude communication system in an embodiment;

[0058] Figure 10 a schematic diagram of a flow of a low-altitude communication method in another embodiment;

[0059] Figure 11 a structural block diagram of a low-altitude communication apparatus in an embodiment;

[0060] Figure 12 a structural block diagram of a low-altitude communication apparatus in another embodiment;

[0061] Figure 13 a structural block diagram of a low-altitude communication apparatus in another embodiment;

[0062] Figure 14 an internal structural diagram of a communication device in an embodiment;

[0063] Figure 15 an internal structural diagram of a communication device in another embodiment;

[0064] Figure 16 a structural block diagram of a low-altitude communication system in an embodiment. DETAILED DESCRIPTION

[0065] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0066] The low-altitude communication method provided by the embodiments of the present application can be applied in an application environment as shown in the following figure. Figure 1 The first cluster master base station 102 can be a cluster master base station in a first low-altitude cluster, and the first cluster master base station 102 can control each cluster slave base station in the first low-altitude cluster, such as controlling the broadcast beam transmission of the cluster slave base station. The second cluster master base station 104 can be a cluster master base station in a second low-altitude cluster, and the second cluster master base station 104 can control each cluster slave base station in the second low-altitude cluster, such as controlling the broadcast beam transmission of the cluster slave base station. The user equipment 106 can move in the low-altitude network to communicate with the first cluster master base station 102 or the second cluster master base station 104 through the low-altitude network.

[0067] The user equipment 106 can send an inter-cluster handover request to the second cluster master base station 104 in the case that the low-altitude cluster handover trigger condition is met; the second cluster master base station 104 can forward the inter-cluster handover request to the first cluster master base station 102. The first cluster master base station 102 receives the inter-cluster handover request forwarded by the second cluster master base station 104, and in the case that the first cluster master base station 102 itself does not meet the service requirement corresponding to the inter-cluster handover request, controls a target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station in the low-altitude cluster to which the first cluster master base station 102 belongs and meeting the service requirement. The first cluster master base station 102 can send first base station information of the first cluster master base station 102 and second base station information of the target cluster slave base station to the second cluster master base station 104. The second cluster master base station 104 can receive the first base station information and the second base station information sent by the first cluster master base station 102, and forward the first base station information and the second base station information to the user equipment 106. The user equipment 106 can receive the first base station information and the second base station information forwarded by the second cluster master base station 104, access the low-altitude control beam sent by the first cluster master base station 102 for control signal communication, and access the low-altitude service beam sent by the target cluster slave base station for service data communication.

[0068] The first cluster master base station 102 or the second cluster master base station 104 can be a base transceiver station (BTS) in a global system of mobile communication (GSM) or a code division multiple access (CDMA), a node B (NB) in a wideband code division multiple access (WCDMA), an evolutional node B (eNB or eNodeB) in LTE, or a relay station or an access point, or a base station in a 5G network, etc. The user equipment 106 can be a terminal device for low-altitude communication in a low-altitude network, such as various devices including a drone, an aircraft, etc.

[0069] Before introducing the specific embodiments of the present application, the professional terms involved in the present application are explained:

[0070] CM: Cluster Master, low-altitude cluster master base station, is a main base station responsible for managing and coordinating other base stations in a low-altitude cluster. It plays a core role in a low-altitude network, responsible for signal strength monitoring, load management, and switching instructions for unmanned aerial vehicles.

[0071] CS: Cluster Slave, Low Altitude Cluster Slave, is a base station subordinate to the Low Altitude Cluster Master, responsible for providing communication services for unmanned aerial vehicles. They are managed by the Low Altitude Cluster Master and perform signal transmission tasks according to instructions.

[0072] UE: User Equipment, User Equipment, refers to devices running in the low-altitude network, such as unmanned aerial vehicles. In some embodiments, UE refers to unmanned aerial vehicles that perform signal measurement and base station switching operations.

[0073] RSRP: Reference Signal Received Power, Reference Signal Received Power, is an indicator to measure the strength of received signals in wireless networks. RSRP is used to evaluate signal quality and determine base station switching opportunities.

[0074] SINR: Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio, is a key indicator to measure the quality of received signals. SINR is used to evaluate the reliability of communication links, affecting base station selection and switching decisions.

[0075] LOS: Line of Sight, Line of Sight Propagation, refers to the propagation of signals without obstacles. In LOS conditions, signal propagation loss is small and coverage is good.

[0076] HO: Handover, Handover, refers to the process of user equipment (such as unmanned aerial vehicles) switching from one base station to another during movement. An effective handover mechanism can improve the coverage range and service continuity of low-altitude networks.

[0077] LACB: Low Altitude Control Beam, Low Altitude Control Beam, used for transmission of control signals for unmanned aerial vehicles.

[0078] LAUB: Low Altitude User Beam, Low Altitude User Beam, used for transmission of video, pictures, sensor data and other service data for unmanned aerial vehicles.

[0079] FDI:Flight Direction Information, UAV flight direction information, the flight direction information of the UAV usually includes the following key information: Heading: refers to the azimuth angle of the current direction of the UAV, usually expressed in degrees, calculated clockwise from true north, ranging from 0 to 360 degrees. Pitch: describes the degree of inclination in the front-to-back direction of the UAV. Positive pitch indicates that the nose is raised, and negative pitch indicates that the nose is tilted down. Roll: describes the degree of inclination in the left-to-right direction of the UAV. Positive roll indicates right tilt, and negative roll indicates left tilt. Yaw: similar to heading, but yaw is usually used to describe the rotation angle of the UAV relative to its initial direction. Speed: the flight speed of the UAV in the current direction, usually expressed in meters per second (m / s) or kilometers per hour (km / h). Position: includes the GPS coordinates (longitude, latitude and altitude) of the UAV, used to accurately determine its current position.

[0080] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes may not be described again in some examples. The embodiments of the present application will be described below with reference to the drawings.

[0081] In one exemplary embodiment, as shown in Figure 2 , a low-altitude communication method is provided, which is applied to the first cluster master base station in Figure 1 , including the following steps 202 to 206. Among them:

[0082] Step 202, receiving an inter-cluster handover request forwarded by the second cluster master base station, the inter-cluster handover request being sent by the user equipment to the second cluster master base station.

[0083] The low-altitude communication is implemented based on a low-altitude communication network, and the low-altitude communication network is a communication network that realizes real-time monitoring and data transmission of low-altitude aircrafts and devices such as airborne sensors through wireless networking, satellite relay and mobile communication technology. The first cluster master base station is a cluster master base station (CM) in the first low-altitude cluster, and the cluster master base station is responsible for managing and coordinating the main base stations of other base stations in the low-altitude cluster. It plays a core role in the low-altitude network, is responsible for signal strength monitoring, load management and unmanned aerial vehicle switching instructions, and can be responsible for and coordinate other base stations in the first low-altitude cluster. The second cluster master base station can be a cluster master base station in the second low-altitude cluster, and is used to manage and coordinate other base stations in the second low-altitude cluster. The user equipment (User Equipment, UE) can be a device running in the low-altitude network, such as a device including an unmanned aerial vehicle or an aircraft. The inter-cluster handover request is a request message for requesting low-altitude cluster handover, and the inter-cluster handover request can be sent by the user equipment to the cluster master base station for low-altitude communication.

[0084] Exemplarily, a communication connection can be established between each cluster master base station in the low-altitude communication network, and specifically, a communication connection can be established between the first cluster master base station and the second cluster master base station. The first cluster master base station can receive the inter-cluster handover request forwarded by the second cluster master base station. The inter-cluster handover request can be sent by the user equipment to the second cluster master base station, such as when the user equipment needs to perform low-altitude cluster handover. In some embodiments, the user equipment can perform low-altitude communication with the second cluster master base station, such as when the user equipment is running in the low-altitude cluster to which the second cluster master base station belongs. The user equipment can perform low-altitude communication with the second cluster master base station. When low-altitude cluster handover is needed, such as when the user equipment moves to the boundary of the low-altitude cluster to which the second cluster master base station belongs, the user equipment can send the inter-cluster handover request to the second cluster master base station. The second cluster master base station can forward the inter-cluster handover request sent by the user equipment to the first cluster master base station, and the first cluster master base station can serve as the cluster master base station in the low-altitude cluster to which the user equipment needs to switch.

[0085] In step 204, in a case where the first cluster master base station itself does not meet the service requirement of the inter-cluster handover request, the target cluster slave base station sends a low-altitude service beam for the user equipment. The target cluster slave base station is a cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs and which meets the service requirement.

[0086] The service requirement is the demand of the user equipment for low-altitude communication to implement corresponding services, and can include at least one of various network resources such as physical resources, logical resources, and service resources. The low-altitude service beam (LAUB) is used for transmission of application layer data, and can be used for transmission of service data such as video, pictures, and sensor data in low-altitude communication. The cluster slave (CS) is a base station belonging to the low-altitude cluster master in the low-altitude cluster, and is responsible for providing communication services. The cluster slave is managed by the low-altitude cluster master and performs signal transmission tasks according to instructions. The target cluster slave is a cluster slave selected for transmitting the low-altitude service beam, and can include a cluster slave selected from the low-altitude cluster to which the first cluster master belongs.

[0087] Optionally, the first cluster master can determine whether the first cluster master itself meets the service requirement corresponding to the inter-cluster handover request, such as determining whether the first cluster master itself meets the service requirement corresponding to the inter-cluster handover request based on the load of the first cluster master, so as to determine whether the first cluster master itself can directly support the low-altitude communication service of the user equipment. In the case that the first cluster master itself does not meet the service requirement, it indicates that the first cluster master cannot directly provide high-performance low-altitude communication for the user equipment, and the first cluster master can control the target cluster slave to transmit the low-altitude service beam for the user equipment. In some embodiments, the first cluster master can determine each cluster slave in the low-altitude cluster to which the first cluster master belongs, select the target cluster slave from each cluster slave according to the service requirement, and configure the target cluster slave to transmit the low-altitude service beam for the user equipment, so as to control the target cluster slave to perform service data transmission with the user equipment.

[0088] In step 206, the first base station information of the first cluster master and the second base station information of the target cluster slave are transmitted to the user equipment through the second cluster master. The first base station information is used to instruct the user equipment to access the low-altitude control beam transmitted by the first cluster master to perform control signal communication, and the second base station information is used to instruct the user equipment to access the low-altitude service beam to perform service data communication.

[0089] The first base station information can include base station information of the first cluster master, such as identification information of the first cluster master, and the second base station information can include base station information of the target cluster slave, such as identification information of the target cluster slave. The identification information can include at least one of various information such as ID (Identity, identification), name, and number. The low-altitude control beam (LACB) is used for transmission of control signals of the user equipment.

[0090] Exemplarily, the first cluster master base station can send the first base station information of the first cluster master base station and the second base station information of the target cluster slave base station to the user equipment through the second cluster master base station. For example, the first cluster master base station can determine the first base station information of the first cluster master base station and the second base station information of the target cluster slave base station, and can send the first base station information and the second base station information to the second cluster master base station, so that the second cluster master base station forwards the first base station information and the second base station information to the user equipment. In some embodiments, after the first cluster master base station controls the target cluster slave base station to send the low-altitude traffic beam for the user equipment, the first cluster master base station can send the low-altitude control beam by itself, so as to realize the separation of the low-altitude control beam and the low-altitude traffic beam, i.e., the low-altitude control beam and the low-altitude traffic beam are sent by different base stations. After the user equipment receives the first base station information and the second base station information, the user equipment can determine the first cluster master base station based on the first base station information, and access to the low-altitude control beam sent by the first cluster master base station to perform control signal communication through the low-altitude control beam, i.e., the first cluster master base station and the user equipment can perform control signal transmission through the low-altitude control beam; the user equipment can determine the target cluster slave base station based on the second base station information, and access to the low-altitude traffic beam sent by the target cluster slave base station to perform service data communication through the low-altitude traffic beam, i.e., the target cluster slave base station and the user equipment can perform service data transmission through the low-altitude traffic beam.

[0091] In some embodiments, as shown in FIG. 6, when the user equipment needs to perform inter-cluster handover, the user equipment can send an inter-cluster handover request to the second cluster master base station currently performing low-altitude communication, and the second cluster master base station can forward the inter-cluster handover request to the first cluster master base station. When it is determined that the first cluster master base station does not meet the service requirements corresponding to the inter-cluster handover request, the first cluster master base station can control the target cluster slave base station to send a low-altitude traffic beam for the user equipment. Figure 3 In some embodiments, as shown in FIG. 6, when the user equipment needs to perform inter-cluster handover, the user equipment can send an inter-cluster handover request to the second cluster master base station currently performing low-altitude communication, and the second cluster master base station can forward the inter-cluster handover request to the first cluster master base station. When it is determined that the first cluster master base station does not meet the service requirements corresponding to the inter-cluster handover request, the first cluster master base station can control the target cluster slave base station to send a low-altitude traffic beam for the user equipment.

[0092] In the low-altitude communication method, the first cluster master base station receives an inter-cluster handover request sent by the user equipment through the second cluster master base station, controls a target cluster slave base station in the low-altitude cluster to send a low-altitude service beam for the user equipment in a case where the first cluster master base station itself does not meet the service requirement corresponding to the inter-cluster handover request, and sends first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the user equipment through the second cluster master base station, so as to instruct the user equipment to access the low-altitude control beam sent by the first cluster master base station to perform control signal communication through the first base station information, and to access the low-altitude service beam to perform service data communication through the second base station information. In the low-altitude communication process, the low-altitude control beam and the low-altitude service beam in the low-altitude cluster are separated in a case where the first cluster master base station itself does not meet the service requirement, and are sent by the first cluster master base station and the target cluster slave base station in the same low-altitude cluster respectively, so that the control beam switching is reduced, the service conflict between the low-altitude network and the ground network is reduced, the low-altitude network signal quality is ensured, and the low-altitude communication performance is improved.

[0093] In one exemplary embodiment, the actual motion information of the user equipment is included in the inter-cluster handover request; and the control of the target cluster slave base station to send the low-altitude service beam for the user equipment comprises: determining predicted motion information of the user equipment based on the actual motion information; generating a beam configuration instruction according to the predicted motion information; and sending the beam configuration instruction to the target cluster slave base station, the beam configuration instruction being used to instruct the target cluster slave base station to send the low-altitude service beam for the user equipment.

[0094] The actual motion information can be motion information corresponding to a historical moment actually generated by the user equipment during operation in the low-altitude communication network. When the user equipment is a UAV, the actual motion information can include flight direction information (FDI) of the UAV, and the flight direction information can include at least one of heading, roll, yaw, speed, and position. The heading refers to the azimuth angle of the current direction of the UAV, which is usually expressed in degrees, calculated clockwise from true north, and ranges from 0 to 360 degrees. The pitch angle describes the inclination of the front and back directions of the UAV, and positive pitch indicates that the nose is raised, and negative pitch indicates that the nose is tilted downward. The roll angle describes the inclination of the left and right directions of the UAV, and positive roll indicates right tilt, and negative roll indicates left tilt. The yaw angle is similar to the heading, but the yaw angle is usually used to describe the rotation angle of the UAV relative to its initial direction. The speed indicates the flight speed of the UAV in the current direction, which is usually expressed in meters per second (m / s) or kilometers per hour (km / h). The position includes the GPS (Global Positioning System) coordinates (longitude, latitude, and altitude) of the UAV, which are used to accurately determine the current position of the UAV.

[0095] The predicted motion information is motion information corresponding to a future moment obtained by predicting the motion of the user equipment. For example, the predicted motion information can include a predicted movement trajectory and position change information of the user equipment. The beam configuration instruction acts on the cluster slave base station to implement broadcast constraint control of the cluster slave base station, such as controlling the low-altitude service beams transmitted by the cluster slave base station.

[0096] Optionally, the inter-cluster handover request includes the actual motion information of the user equipment (UE), meaning the UE can report its own actual motion information when sending the inter-cluster handover request. The first cluster master base station can extract the actual motion information of the UE from the inter-cluster handover request and predict the motion of the UE based on the actual motion information to obtain the predicted motion information of the UE. For example, the first cluster master base station can predict the UE's location and speed in the future based on machine learning algorithms. The first cluster master base station can generate beam configuration instructions based on the predicted motion information and send the beam configuration instructions to the target cluster slave base station to control the target cluster slave base station to send low-altitude service beams for the UE. In some embodiments, the target cluster slave base station can send a narrower directional service beam (LAUB) to align with and track the UAV UE based on the beam configuration instructions. The directional service beam (LAUB) needs to adjust parameters such as beam direction, length (power), and width.

[0097] In this embodiment, the first cluster main base station determines the predicted motion information based on the actual motion information of the user equipment, and generates a beam configuration command according to the predicted motion information. The beam configuration command controls the target cluster to send low-altitude service beams for the user equipment from the base station. By controlling the target cluster to send directional low-altitude service beams that can be aligned with and track the user equipment through the predicted motion information of the user equipment, the low-altitude network signal quality can be ensured, thereby improving the low-altitude communication performance.

[0098] In one exemplary embodiment, such as Figure 4 As shown, the process of controlling the transmission of low-altitude service beams, i.e., when the primary base station of the first cluster does not meet the service requirements corresponding to the inter-cluster handover request, controls the target cluster to transmit low-altitude service beams for user equipment from the base station, including steps 402 to 406. Wherein:

[0099] Step 402: If the load of the primary base station of the first cluster does not meet the service requirements corresponding to the inter-cluster handover request, determine the load of each slave base station in the low-altitude cluster to which the primary base station of the first cluster belongs.

[0100] For example, the first cluster master base station can determine its own load and, based on its load, determine whether it meets the service requirements corresponding to the inter-cluster handover request. When the first cluster master base station's own load is too heavy and does not meet the service access requirements of the user equipment, the first cluster master base station needs to separate the low-altitude service beam from the low-altitude control beam. The first cluster master base station can determine the load of each cluster slave base station in its low-altitude cluster. For example, the first cluster master base station can query the load of each cluster slave base station in its low-altitude cluster based on historical data or real-time data.

[0101] At step 404, at least one target cluster slave base station satisfying the service requirement is determined from the cluster slave base stations according to the respective load of each cluster slave base station.

[0102] Optionally, the first cluster master base station can screen the cluster slave base stations based on the respective load of each cluster slave base station to screen out target cluster slave base stations satisfying the service requirement from the cluster slave base stations, and the target cluster slave base stations can include at least one.

[0103] At step 406, the at least one target cluster slave base station is controlled to send a low-altitude service beam for the user equipment.

[0104] Illustratively, the first cluster master base station can control the determined at least one target cluster slave base station to respectively send a low-altitude service beam for the user equipment. For example, the first cluster master base station can dynamically configure the at least one target cluster slave base station to respectively send one directional low-altitude service beam LAUB, and the parameters of the respective low-altitude service beams of the target cluster slave base stations can be determined based on the predicted motion information of the user equipment, which can be predicted based on the actual motion information of the user equipment.

[0105] In the embodiment, in the case that the first cluster master base station itself does not satisfy the service requirement of the inter-cluster handover request, the first cluster master base station can determine at least one target cluster slave base station satisfying the service requirement according to the respective load of each cluster slave base station, and control the at least one target cluster slave base station to send a low-altitude service beam for the user equipment, so as to separate the low-altitude control beam and the low-altitude service beam in the low-altitude cluster, and respectively send the low-altitude control beam and the low-altitude service beam by the first cluster master base station and the target cluster slave base station in the same low-altitude cluster, which can reduce the frequent switching of the control beam, reduce the service conflict between the low-altitude network and the ground network, ensure the low-altitude network signal quality, and thus improve the low-altitude communication performance.

[0106] In one exemplary embodiment, the low-altitude communication method further includes: in the case that the first cluster master base station itself satisfies the service requirement, sending first base station information to the user equipment through the second cluster master base station; wherein the first base station information is used to instruct the user equipment to access to the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station.

[0107] Exemplarily, in a case that the first cluster master base station itself meets the service requirement, such as the first cluster master base station itself has a light load and meets the low-altitude communication service requirement for the user equipment, the first cluster master base station can directly switch the low-altitude control beam and the low-altitude service beam into the broadcast beams of the first cluster master base station itself. The first cluster master base station can send the first base station information of the first cluster master base station itself to the second cluster master base station for forwarding to the user equipment by the second cluster master base station. The user equipment can access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station based on the first base station information. In some embodiments, in a case that the first cluster master base station itself meets the service requirement, the first cluster master base station can send the low-altitude control beam and the low-altitude service beam for the user equipment to access the low-altitude control beam for control signal communication and access the low-altitude service beam for service data communication.

[0108] In some embodiments, as shown in Figure 5 when the inter-cluster switching is needed, the user equipment can send an inter-cluster switching request to the second cluster master base station currently performing the low-altitude communication, and the second cluster master base station can forward the inter-cluster switching request to the first cluster master base station. In a case that the first cluster master base station determines that it meets the service requirement corresponding to the inter-cluster switching request, the first cluster master base station can send base station information to the second cluster master base station, the base station information including the first base station information of the first cluster master base station, and the second cluster master base station can forward the base station information to the user equipment. The user equipment can access based on the base station information. Specifically, the user equipment can access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station for control signal communication and service data communication.

[0109] In the embodiment, in a case that the first cluster master base station itself meets the service requirement, the first cluster master base station directly controls the user equipment to access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station, which can reduce the frequent switching of the control beam, reduce the service conflict between the low-altitude network and the ground network, and ensure the low-altitude network signal quality, thereby improving the low-altitude communication performance.

[0110] In one exemplary embodiment, as shown in Figure 6 a low-altitude communication method is provided, which is applied to the user equipment in Figure 1 for example, and includes the following steps 602 to 604. Wherein:

[0111] Step 602, in a case that a low-altitude cluster switching trigger condition is met, sending an inter-cluster switching request to a first cluster master base station through a second cluster master base station currently performing low-altitude communication.

[0112] The low-altitude cluster switching trigger condition is used to determine whether low-altitude cluster switching is needed, so that low-altitude communication is performed through base stations in different low-altitude clusters. The low-altitude cluster switching trigger condition can be set according to actual needs. For example, whether the low-altitude cluster switching trigger condition is met can be determined based on low-altitude communication quality. For example, when the low-altitude communication quality is low, it can be determined that the low-altitude cluster switching trigger condition is met. The low-altitude communication quality can be represented by a signal quality parameter of low-altitude communication. The signal quality parameter can include, but is not limited to, at least one of a reference signal received power (RSRP) and a signal to interference plus noise ratio (SINR). The reference signal received power is an index for measuring the received signal strength in a wireless network. The RSRP is used to evaluate signal quality and determine base station switching time. The signal to interference plus noise ratio is a key index for measuring received signal quality. The SINR is used to evaluate the reliability of a communication link and affects base station selection and switching decisions. The cluster-to-cluster switching request is a request message for requesting low-altitude cluster switching. The cluster-to-cluster switching request can be sent by the user equipment to the second cluster master base station for low-altitude communication, and forwarded by the second cluster master base station to the first cluster master base station to be switched between clusters. The first cluster master base station and the second cluster master base station can be cluster master base stations in the low-altitude clusters to which they belong, and are used to manage and coordinate other cluster slave base stations in the low-altitude clusters.

[0113] For example, the user equipment can detect whether the low-altitude cluster switching trigger condition is met to determine whether low-altitude cluster switching is needed. When it is determined that the low-altitude cluster switching trigger condition is met, for example, when the user equipment is at a boundary position of the current low-altitude cluster, and the RSRP and / or SINR of the currently served second cluster master base station broadcast beam LACB is measured to be lower than a corresponding threshold value, the user equipment can determine that the low-altitude cluster switching trigger condition is met. The user equipment can send a cluster-to-cluster switching request to the second cluster master base station to request low-altitude cluster switching. The second cluster master base station can forward the cluster-to-cluster switching request to the first cluster master base station to be switched.

[0114] In step 604, when the first base station information and the second base station information sent by the first cluster master base station through the second cluster master base station are received, the user equipment accesses the low-altitude control beam sent by the first cluster master base station to perform control signal communication, and accesses the low-altitude service beam sent by the target cluster slave base station to perform service data communication. The first base station information is the base station information of the first cluster master base station, and the second base station information is the base station information of the target cluster slave base station. The target cluster slave base station is a cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs and that meets the corresponding service requirements of the cluster-to-cluster switching request.

[0115] The low-altitude control beam is used for transmission of control signals in low-altitude communication, and the low-altitude service beam is used for transmission of service data in low-altitude communication. The target cluster is selected from the low-altitude cluster to which the first cluster master base station belongs, and is used for transmitting the low-altitude service beam.

[0116] Optionally, after the user equipment sends the inter-cluster handover request, in a case where the first base station information and the second base station information forwarded by the second cluster master base station are received, the user equipment can access the low-altitude control beam transmitted by the first cluster master base station to perform control signal communication, and access the low-altitude service beam transmitted by the target cluster slave base station to perform service data communication. In some embodiments, the first base station information and the second base station information are sent by the first cluster master base station to the second cluster master base station, and are forwarded by the second cluster master base station to the user equipment. The user equipment can determine the first cluster master base station based on the first base station information, and access the low-altitude control beam transmitted by the first cluster master base station to perform control signal communication through the low-altitude control beam. The user equipment can determine the corresponding target cluster slave base station based on the second base station information, and access the low-altitude service beam transmitted by the target cluster slave base station to perform service data communication through the accessed low-altitude service beam.

[0117] In the low-altitude communication method described above, in a case where the low-altitude cluster handover trigger condition is met, the user equipment sends an inter-cluster handover request to the first cluster master base station through the second cluster master base station currently performing low-altitude communication, and in a case where the first base station information of the first cluster master base station and the second base station information of the target cluster slave base station sent by the first cluster master base station through the second cluster master base station are received, the user equipment accesses the low-altitude control beam transmitted by the first cluster master base station to perform control signal communication, and accesses the low-altitude service beam transmitted by the target cluster slave base station to perform service data communication. In the low-altitude communication process, in a case where the first cluster master base station itself does not meet the service requirement, the low-altitude control beam and the low-altitude service beam in the low-altitude cluster are separated, and are transmitted by the first cluster master base station and the target cluster slave base station in the same low-altitude cluster, respectively. This can reduce frequent switching of the control beam, reduce service conflict between the low-altitude network and the ground network, ensure low-altitude network signal quality, and thus improve low-altitude communication performance.

[0118] In an exemplary embodiment, the low-altitude communication method further includes, in a case where the first base station information sent by the first cluster master base station through the second cluster master base station is received, accessing the low-altitude control beam and the low-altitude service beam transmitted by the first cluster master base station.

[0119] The first base station information is base station information corresponding to the first cluster master base station. For example, when the user equipment receives the base station information forwarded by the second cluster master base station and the base station information includes the first base station information but does not include the second base station information, it indicates that the user equipment can directly access the broadcast beam of the first cluster master base station, and the broadcast beam includes the low-altitude control beam and the low-altitude service beam. The user equipment can access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station to communicate control signals through the accessed low-altitude control beam and communicate service data through the accessed low-altitude service beam. In some embodiments, after the user equipment receives the base station information forwarded by the second cluster master base station, it can determine whether the base station information includes the base station information corresponding to the cluster slave base station, i.e., whether the second base station information corresponding to the target cluster slave base station is included. When the second base station information is not included and the first base station information is included, the user equipment can access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station.

[0120] In the embodiment, when the first base station information of the first cluster master base station is received and the second base station information is not received, the user equipment can access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station, which can reduce the frequent switching of control beams, reduce the service conflict between the low-altitude network and the ground network, ensure the signal quality of the low-altitude network, and thus improve the low-altitude communication performance.

[0121] In an exemplary embodiment, the target cluster slave base station includes at least one, and the user equipment accesses the low-altitude service beam sent by the target cluster slave base station to communicate service data, including: determining the respective signal quality parameters between the user equipment and the target cluster slave base station; determining the to-be-accessed cluster slave base station from the target cluster slave base station according to the respective signal quality parameters between the user equipment and the target cluster slave base station; and accessing the low-altitude service beam sent by the to-be-accessed cluster slave base station to communicate service data.

[0122] The signal quality parameter is used to represent the communication quality of the low-altitude communication, and can include at least one of a reference signal received power and a signal-to-noise ratio, but is not limited thereto. The to-be-accessed cluster slave base station is a cluster slave base station determined from the target cluster slave base station and accessed by the user equipment to communicate service data.

[0123] Exemplarily, the target cluster from base station screened out from the base stations by the user equipment comprises at least one, and the user equipment can determine a signal quality parameter between the user equipment and each target cluster from base station, such as determining a signal strength RSRP and / or a signal to interference noise ratio SINR between the user equipment and each target cluster from base station, and the user equipment can screen the target cluster from base station based on the respective signal quality parameter to determine a to-be-accessed cluster from base station which needs to be accessed. For example, the user equipment can determine the target cluster from base station with the maximum signal strength RSRP or signal to interference noise ratio SINR value as the to-be-accessed cluster from base station. The user equipment can access the low-altitude traffic beam sent by the to-be-accessed cluster from base station to communicate traffic data through the low-altitude traffic beam sent by the to-be-accessed cluster from base station.

[0124] In the embodiment, the user equipment can determine the to-be-accessed cluster from base station from the target cluster from base station according to the respective signal quality parameter between the user equipment and each target cluster from base station, to access the low-altitude traffic beam sent by the to-be-accessed cluster from base station to communicate traffic data, and the signal quality of the low-altitude traffic beam can be ensured, thereby improving the low-altitude communication performance.

[0125] In one exemplary embodiment, in the case that the low-altitude cluster switching trigger condition is met, the inter-cluster switching request is sent to the first cluster master base station through the second cluster master base station currently performing low-altitude communication, comprising: in the case that the signal quality parameter between the user equipment and the second cluster master base station currently performing low-altitude communication meets the low-altitude cluster switching trigger condition, generating the inter-cluster switching request based on the actual motion information of the user equipment; and sending the inter-cluster switching request to the second cluster master base station, the inter-cluster switching request being used to instruct the second cluster master base station to forward the inter-cluster switching request to the first cluster master base station to be switched between clusters.

[0126] The actual motion information can be motion information corresponding to a historical moment actually generated by the user equipment during operation in the low-altitude communication network. Alternatively, during the current low-altitude communication between the user equipment and the second cluster master base station, the user equipment can detect the signal quality parameter between the user equipment and the second cluster master base station to determine whether the low-altitude cluster switching trigger condition is met through the signal quality parameter. For example, the RSRP and / or SINR of the broadcast beam of the second cluster master base station can be detected, and in the case that the RSRP and / or SINR value is lower than a preset threshold value, it can be determined that the low-altitude cluster switching trigger condition is met. The user equipment can obtain the actual motion information of the user equipment, and generate the inter-cluster switching request based on the actual motion information. The user equipment can send the inter-cluster switching request to the second cluster master base station, so that the second cluster master base station forwards the inter-cluster switching request to the first cluster master base station to be switched between clusters.

[0127] In this embodiment, when the user equipment determines that the low-altitude cluster switching trigger condition is met based on the signal quality parameter between the user equipment and the second cluster master base station, the user equipment generates an inter-cluster switching request based on the actual motion information, and forwards the inter-cluster switching request to the first cluster master base station through the second cluster master base station, so that the low-altitude cluster switching can be performed in time by reporting the inter-cluster switching request, the low-altitude network signal quality is ensured, and the low-altitude communication performance is improved.

[0128] In one exemplary embodiment, as shown in Figure 7 , a low-altitude communication method is provided, which is applied to the second cluster master base station in Figure 1 , and includes the following steps 702 to 704. Wherein:

[0129] Step 702, receiving an inter-cluster switching request sent by a user equipment, and forwarding the inter-cluster switching request to a first cluster master base station.

[0130] Wherein, the inter-cluster switching request is a request message for requesting low-altitude cluster switching. The inter-cluster switching request can be sent by the user equipment to the cluster master base station for low-altitude communication. Exemplarily, in the process of low-altitude communication between the second cluster master base station and the user equipment, the second cluster master base station can receive the inter-cluster switching request sent by the user equipment, and forward the inter-cluster switching request to the first cluster master base station.

[0131] Step 704, receiving first base station information and second base station information sent by the first cluster master base station in response to the inter-cluster switching request, and forwarding the first base station information and the second base station information to the user equipment; wherein the first base station information is the base station information of the first cluster master base station, and the first base station information is used to instruct the user equipment to access the low-altitude control beam sent by the first cluster master base station for control signal communication; the second base station information is the base station information of a target cluster slave base station, and the second base station information is used to instruct the user equipment to access the low-altitude service beam sent by the target cluster slave base station for service data communication; the target cluster slave base station is a cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs, which meets the service requirements corresponding to the inter-cluster switching request.

[0132] Optionally, the second cluster master base station can receive the base station information sent by the first cluster master base station in response to the inter-cluster switching request, and the base station information can include the first base station information corresponding to the first cluster master base station and the second base station information corresponding to the target cluster slave base station. The second cluster master base station can forward the first base station information and the second base station information to the user equipment, so that the user equipment accesses the low-altitude control beam sent by the first cluster master base station for control signal communication, and accesses the low-altitude service beam sent by the target cluster slave base station for service data communication.

[0133] In the low-altitude communication method, the second cluster master base station forwards an inter-cluster handover request sent by the user equipment to the first cluster master base station, and forwards first base station information and second base station information sent by the first cluster master base station to the user equipment, so that the user equipment accesses a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and accesses a low-altitude service beam to perform service data communication according to the second base station information. In the low-altitude communication process, the low-altitude control beam and the low-altitude service beam in the low-altitude cluster are separated in the case that the first cluster master base station itself does not meet the service requirements, and are sent by the first cluster master base station and a target cluster slave base station in the same low-altitude cluster, respectively, so that the control beam switching frequency is reduced, the service conflict between the low-altitude network and the ground network is reduced, the low-altitude network signal quality is ensured, and the low-altitude communication performance is improved.

[0134] In an exemplary embodiment, the low-altitude communication method further comprises: receiving the first base station information sent by the first cluster master base station, and forwarding the first base station information to the user equipment; wherein the first base station information is used to instruct the user equipment to access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station.

[0135] The first base station information is base station information corresponding to the first cluster master base station. For example, the second cluster master base station can receive the first base station information sent by the first cluster master base station, the second cluster master base station can forward the first base station information to the user equipment, and the user equipment can access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station to perform control signal communication through the accessed low-altitude control beam and service data communication through the accessed low-altitude service beam.

[0136] In this embodiment, the second cluster master base station forwards the first base station information sent by the first cluster master base station to the user equipment, so that the user equipment accesses the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station, which can reduce the control beam switching frequency, reduce the service conflict between the low-altitude network and the ground network, ensure the low-altitude network signal quality, and improve the low-altitude communication performance.

[0137] The application also provides an application scenario applying the low-altitude communication method. Specifically, the low-altitude communication method is applied in the application scenario as follows:

[0138] In the 5G+ low-altitude network and ground network joint networking scenario, low-altitude terminals (drones, low-altitude aircrafts, etc.) are not only used for logistics distribution, but also used for meteorological monitoring, agricultural monitoring, emergency communication and rescue operations, etc. For these joint networking scenarios, due to the conflict and interference between ground services and low-altitude services, the low-altitude network and ground network signal quality is reduced, thereby affecting the data transmission rate and reliability, and seriously affecting the user experience of the low-altitude network and the ground network.

[0139] As shown in Figure 8 The current low-altitude communication network is based on the existing 5G+ communication network for ground user coverage, and takes into account low-altitude coverage. The 3.5G adopts dual carriers, i.e., carrier 1 (F1) covers ground users. Since low-altitude coverage is LOS, the loss to space is relatively small compared to ground propagation loss. The low-altitude base station spacing is generally 3-5 times that of the ground base station spacing. Therefore, some fixed-position ground base station carrier 2 (F2) is configured with broadcast beams for ground and space at the same time, and the traffic beams are dynamically shared to take into account coverage of ground users and low-altitude unmanned aerial vehicle users. However, when the fixed-position ground base station carrier 2 has a large load for ground users or the ground base station carrier 2 aggregates 2CC (Component Carrier) or 3CC carriers (5G-A / 5G+) according to the traffic needs, the ground base station carrier 2 cannot meet the needs of low-altitude traffic, thereby seriously affecting the low-altitude network communication performance and low-altitude network user experience. Therefore, the low-altitude communication method provided by the present application involves separating control beams and traffic beams based on low-altitude clusters to improve low-altitude communication performance, which can greatly reduce the traffic conflict between ground networks and low-altitude networks, reduce mutual interference, reduce frequent switching of control beams, improve unmanned aerial vehicle traffic throughput, and significantly improve low-altitude network performance and user perception, and reduce the cost of low-altitude network and ground network construction and optimization.

[0140] The current low-altitude communication network uses the existing 5G+ ground network to take into account ground and low-altitude user coverage. The 3.5G network adopts dual carrier design, in which carrier 1 covers ground users, and carrier 2 provides ground and low-altitude broadcast beams at the same time in a fixed position. However, when the ground user load of carrier 2 increases or 2CC / 3CC carrier aggregation is performed, the low-altitude traffic demand cannot be met, thereby affecting the communication performance and user experience of the low-altitude network. The present application involves separating control beams and traffic beams based on low-altitude clusters to improve low-altitude communication performance, and involves a new network architecture in which a ground base station is converted into a low-altitude cluster master base station and a low-altitude cluster slave base station. When the unmanned aerial vehicle flies at low altitude, inter-cluster switching and separation of intra-cluster control beams and traffic beams are realized according to the unmanned aerial vehicle flight information and the load of the base stations (second carrier) in the low-altitude cluster, which solves the traffic conflict between the ground network and the low-altitude network, improves the utilization rate of wireless resources of the entire system, improves the network performance and user experience, reduces the network construction and optimization cost, and has good practical value and wide application prospect.

[0141] Specifically, the low-altitude communication method provided by the application relates to separation of control beams and service beams based on low-altitude clusters to improve low-altitude communication performance. Specifically, the ground base station is converted into a new network architecture of a low-altitude cluster master base station (CM) + a low-altitude cluster slave base station (CS). That is, a high-efficiency low-altitude network structure is formed by establishing mesh connection among low-altitude cluster master base stations (CM) and star connection between the low-altitude cluster master base stations (CM) and the surrounding slave base stations (CS) belonging to the low-altitude cluster master base stations (CM). When the unmanned aerial vehicle flies at a low altitude, the directional service beam serving the unmanned aerial vehicle can be dynamically adjusted according to the unmanned aerial vehicle flight information and the load condition of the low-altitude cluster base station (second carrier), the inter-cluster switching and the separation of the control beam and the service beam in the low-altitude cluster are realized, the service conflict between the ground network and the low-altitude network is solved, the control beam switching frequency is reduced, the unmanned aerial vehicle service throughput is improved, the system wireless resource utilization rate is improved, the low-altitude network performance and user experience are improved, the network construction and optimization cost is saved, and good practical value and wide application prospect are achieved.

[0142] Specifically, mesh connection among low-altitude cluster master base stations (CM) and star connection between the low-altitude cluster master base stations (CM) and the surrounding slave base stations (CS) belonging to the low-altitude cluster master base stations (CM) are established to form a high-efficiency low-altitude network structure. As shown in Figure 9 Each dashed box covers a low-altitude cluster, which can include a plurality of base stations, including a cluster master base station and a plurality of cluster slave base stations. For example, the cluster master base station CM(i) and the plurality of cluster slave base stations CS(i, 1), CS(i, 2), CS(i, 3), …, CS(i, n) belong to the same low-altitude cluster; the cluster master base station CM(j) and the plurality of cluster slave base stations CS(j, 1), CS(j, 2), CS(j, 3), …, CS(j, m) belong to the same low-altitude cluster. Between different low-altitude clusters, the cluster master base stations can switch the low-altitude control beam through inter-cluster handover. In the low-altitude cluster, the user equipment can access the low-altitude control beam (F2-LACB) of the second carrier of the cluster master base station for control signal communication, and can also access the low-altitude service beam (F2-LAUB) of the second carrier of the cluster slave base station for service data communication. According to the unmanned aerial vehicle flight information and the load condition of the low-altitude cluster base station (second carrier), especially when there is a 5G-A base station for 2CC or 3CC carrier aggregation service scenario, the method of inter-cluster switching and separation of the low-altitude cluster control beam LACB and the service beam LAUB is performed, that is, the control beam always resides on the cluster master base station, and the service beam dynamically resides on the cluster slave (or master) base station according to the unmanned aerial vehicle flight information and the load condition of the cluster base station. Not only does it solve the service conflict between the ground network and the low-altitude network, reduce the control beam switching frequency, improve the unmanned aerial vehicle service throughput, but also improves the low-altitude network performance and user experience, improves the system wireless resource utilization rate, saves the network construction and optimization cost.

[0143] Specifically, as shown in the low-altitude communication method provided by the application can include: Figure 9

[0144] 1) The ground base station (second carrier) currently fixed as a low-altitude base station is set as a low-altitude cluster master (CM) base station, and all low-altitude cluster master (CM) base stations are simultaneously configured with broadcast beams for ground and space, which can be configured as A:B type broadcast beams, for example, A+B=7 broadcast beams in total, configured as A:B (4:3) type broadcast beams, that is, A (4) broadcast beams for ground and B (3) broadcast beams for space, A:B can also be 5:2, 6:1 or 3:4, 2:5, etc., and the service beams are dynamically shared in real time;

[0145] 2) The ground base station (second carrier) around the low-altitude cluster master base station CM(i) is set as a low-altitude cluster slave (CS) base station subordinate to the low-altitude cluster master base station CM(i), such as CS(i,1), CS(i,2), CS(i,3), …, CS(i,k), the low-altitude cluster master base station CM(i) is connected with the low-altitude cluster slave CS(i,k) base station subordinate to it to form a star structure, and the low-altitude cluster master base stations are connected to form a mesh structure;

[0146] 3) The unmanned aerial vehicle UE flies in low altitude, such as flying from the right low-altitude cluster to the left low-altitude cluster, when the unmanned aerial vehicle UE measures the broadcast beam RSRP or / and SINR of the currently served low-altitude cluster master base station CM(j) (the LACB low-altitude control beam always resides on the cluster master base station) to be lower than the corresponding threshold value at the low-altitude cluster boundary, initiates a low-altitude inter-cluster handover request and reports the flight direction information FDI of the unmanned aerial vehicle together;

[0147] 4) After the currently served low-altitude cluster master base station (CM(j) receives the inter-cluster handover request initiated by the unmanned aerial vehicle UE, informs the adjacent low-altitude cluster master base station CM(i) through the inter-base station link;

[0148] ​5) After the low-altitude cluster master base station CM(i) receives the handover request from the low-altitude cluster master base station (CM(j), if the load of the low-altitude cluster master base station CM(i) is light and meets the requirements of the UAV UE service, the low-altitude cluster master base station CM(i) number is notified to the UAV UE through the low-altitude cluster master base station CM(j). If the load of the low-altitude cluster master base station CM(i) is heavy and does not meet the requirements of the UAV UE service, the low-altitude cluster control beam LACB and the service beam LAUB are separated, i.e. according to the load of all slave base stations in the low-altitude cluster, the load of the low-altitude cluster slave base station CS(i, k) (1 <= k < max(CS(i, k)) that meets the requirements of the UAV UE service is notified to dynamically configure one or more directional service beams LAUB for the UAV, and according to the flight direction information FDI of the UAV, the current position, speed and direction of the UAV UE are obtained, and the moving track and position change of the UAV UE are predicted by using an algorithm (such as a machine learning algorithm), then each slave base station sends a narrower directional service beam LAUB to align and track the UAV UE, and the directional service beam LAUB needs to adjust the beam direction, length (power), width and narrowness of the LAUB beam; and the number of one (or more) low-altitude cluster slave base stations CS(i, k) is notified to the UAV UE through the CM(j) base station;

[0149] 6) After the UAV UE receives the number of one (or more) low-altitude cluster slave base stations CS(i, 1), CS(i, 2), …, CS(i, k), the corresponding directional service beam LAUB signal strength RSRP or (and) signal-to-interference-and-noise ratio SINR of the adjacent one (or more) low-altitude cluster slave base stations is measured and the maximum value corresponding to the low-altitude cluster slave base station number is selected, such as CS(i, n), then the UAV UE initiates access to the directional service beam LAUB corresponding to the low-altitude cluster slave base station CS(i, n), and after the access is successful, the uplink and downlink UAV service is started on the directional service beam LAUB.

[0150] Wherein, since the low-altitude coverage is usually line-of-sight propagation (LOS) and the loss to the air is relatively small, the low-altitude base station inter-station distance is usually 3-5 times that of the ground base station, which is the basis for the inter-cluster handover and the intra-cluster control beam and service beam separation technical solution; and in the present application, the handover condition can be based on the service beam RSRP, the service beam SINR, or the service beam RSRP & SINR. In addition, the low-altitude control beam LACB anchor point is on the intra-cluster master base station, and the low-altitude service beam LAUB is dynamically selected on different slave base stations in the cluster, realizing the dynamic separation of the low-altitude control beam LACB and the low-altitude service beam LAUB, and when the low-altitude service beam LAUB is dynamically selected on the intra-cluster master base station. Assuming that there are 8 broadcast beams, the A:B type broadcast beams to the ground and to the air can be configured as 6:2, 5:3, 4:4, 3:5, 2:6, etc.

[0151] The low-altitude communication method provided by the present application realizes the separation of the low-altitude control beam LACB and the low-altitude service beam LAUB in the low-altitude cluster, wherein the low-altitude control beam LACB always resides on the intra-cluster master base station, and the LACB is responsible for the inter-cluster handover of the unmanned aerial vehicle UE in the low-altitude cluster. Moreover, the low-altitude service beam LAUB allows the unmanned aerial vehicle UE service to dynamically reside on the intra-cluster slave (or master) base station according to the unmanned aerial vehicle flight information and the cluster base station load condition, increases the uplink and downlink throughput of the unmanned aerial vehicle UE service, reduces the frequent handover of the low-altitude control beam LACB, eliminates the service conflict between the ground network and the low-altitude network, reduces the frequent handover of the control beam, improves the unmanned aerial vehicle service throughput, improves the low-altitude network performance and user experience, and improves the system wireless resource utilization rate and saves network construction and optimization costs.

[0152] As shown in Figure 10 , the low-altitude communication method provided by the present application can include:

[0153] 1) configuring the cluster master base station in the low-altitude cluster, specifically, configuring the ground base station (second carrier) as the low-altitude cluster master base station (CM), and configuring the broadcast beams to the ground and to the air of the ground base station as A:B type, and configuring the service beams to be real-time dynamically shared;

[0154] 2) configuring the cluster slave base station in the low-altitude cluster, specifically, configuring the low-altitude cluster master base stations (CMs) to form a mesh structure; and configuring the base stations around the low-altitude master base station (CM) as low-altitude cluster slave base stations (CSs) to form a star structure with the low-altitude cluster master base station (CM);

[0155] 3) base station initialization processing, specifically, performing initialization procedures such as the low-altitude cluster master base station and the low-altitude cluster slave base station;

[0156] 4) User equipment initiates low altitude inter-cluster handover request and reports flight direction information. Specifically, when the unmanned aerial vehicle measures the RSRP or (and) SINR of the broadcast beam LACB of the current serving low altitude cluster master base station (CM) at the low altitude inter-cluster boundary to be lower than the corresponding threshold value, it initiates a low altitude inter-cluster handover request and reports flight direction information (FDI) at the same time;

[0157] 5) Cluster master base station configures the transmission of broadcast beams according to load. Specifically, after receiving the inter-cluster handover request, the adjacent low altitude cluster master base station CM(i) checks its own load condition. If the load is light and can meet the unmanned aerial vehicle service demand, it directly notifies the unmanned aerial vehicle to switch LACB and LAUB to the low altitude cluster master base station CM(i). If the load is heavy, it separates LACB and LAUB, then checks the load conditions of all slave base stations under the low altitude cluster, selects one or more low altitude slave base stations (CS(i,k)) with light load and meets the unmanned aerial vehicle service requirements, and dynamically configures their service beams to become directional service beams LAUB for the air. Machine learning algorithm is used to predict the moving track of the unmanned aerial vehicle;

[0158] 6) Cluster slave base station sends directional service beams. Specifically, each slave base station sends one relatively narrow directional service beam LAUB to aim at and track the unmanned aerial vehicle. The directional service beam LAUB needs to adjust the beam direction, length (power), width and narrowness, etc. of LAUB. And the low altitude cluster slave base station number CS(i,k) informs the unmanned aerial vehicle through CM(i) and CM(j) base station;

[0159] 7) User equipment performs access. Specifically, after receiving the low altitude cluster slave base station number CS(i,k), the unmanned aerial vehicle measures the RSRP or (and) SINR of the corresponding directional service beam LAUB, selects the optimal low altitude cluster slave base station (such as CS(i,n)), and initiates an access request to its directional service beam LAUB. After successful access, the uplink and downlink unmanned aerial vehicle service starts on the directional service beam LAUB.

[0160] 8) Repeat steps 4) to 7) to continuously optimize low altitude communication performance, improve unmanned aerial vehicle service throughput, reduce frequent switching of control beams LACB, eliminate service conflicts between ground and low altitude networks, and improve overall system resource utilization and user experience.

[0161] The low-altitude communication method provided in the application introduces a method for improving the low-altitude communication performance by separating the control beam from the service beam based on a low-altitude cluster, connects the low-altitude cluster master base station and the low-altitude cluster slave base stations around it into a star structure, and connects a mesh structure between the low-altitude cluster master base stations, so as to realize efficient organization of the network topology, which is conducive to the inter-cluster switching of the low-altitude cluster and the separation of the control beam from the service beam in the cluster. Specifically, the ground base station is configured as a low-altitude cluster master (CM) base station, and the ground-to-space and space-to-space broadcast beams are configured as A:B type (A and B can be dynamically changed) to realize dynamic sharing of the low-altitude cluster slave (CS) base station directional service beam. The low-altitude communication method provided in the application is suitable for various broadcast beam configuration combinations (such as 6:2, 5:3, 4:4, etc.), and can ensure the universality and flexibility of the low-altitude communication method.

[0162] Further, at the low-altitude cluster boundary, when the measured broadcast beam signal strength RSRP or (and) signal-to-interference noise ratio SINR is lower than the corresponding threshold, an inter-cluster switching request is initiated and flight direction information FDI is reported. The current serving base station notifies the adjacent low-altitude master (slave) base station mechanism through the inter-station link and the intra-station link to realize inter-cluster switching and separation of the control beam from the service beam in the cluster. By separating the control beam from the service beam, the frequent switching of the control beam is reduced, the management and allocation of network resources are more flexible, and the service throughput of the unmanned aerial vehicle is improved. The control beam LACB always resides in the low-altitude cluster master base station and is responsible for inter-cluster switching, and the service beam LAUB dynamically adjusts the beam direction, long / short (power), wide / narrow, and other parameters according to the unmanned aerial vehicle flight information and the low-altitude cluster slave base station load. After receiving the inter-cluster switching request and flight direction information FDI reported by the unmanned aerial vehicle, the target low-altitude cluster master base station dynamically adjusts the service beam configuration of the target low-altitude cluster slave (or master) base station that meets the unmanned aerial vehicle service requirements according to the load of all slave (or master) base stations in the target low-altitude cluster.

[0163] Moreover, the current serving base station combines the broadcast beam signal strength RSRP or (and) signal-to-interference noise ratio SINR information reported by the unmanned aerial vehicle, and negotiates with the adjacent low-altitude cluster master base station to select the best broadcast beam (control beam) for inter-cluster handover strategy (optimized handover). According to the flight direction information of the unmanned aerial vehicle, the flight trajectory of the unmanned aerial vehicle is predicted by using a machine learning algorithm, and the low-altitude cluster is dynamically configured with a directional service beam LAUB from the base station and is aligned and tracked to the unmanned aerial vehicle. The unmanned aerial vehicle measures the service beam signal strength RSRP or (and) signal-to-interference noise ratio SINR according to the received low-altitude cluster from the base station number, and selects the optimal slave base station and service beam for access. Thus, the service conflict between the ground network and the low-altitude network can be effectively eliminated, the co-channel interference is reduced, and the overall performance of the 5G+ / 6G network is improved. By improving the handover mechanism, beam and resource adjustment and management mechanism of the network, the experience of the unmanned aerial vehicle user in the low-altitude network can be improved. Through intelligent handover and scheduling strategy, the utilization efficiency of the overall system resources is improved. By reducing the cost of construction and optimization of the ground network and the low-altitude network, more stable and efficient network services can be provided for users in different fields.

[0164] The low-altitude communication method provided in the present application improves the low-altitude communication performance by separating the control beam and the service beam of the low-altitude cluster, and converts the ground base station into a new network architecture of low-altitude cluster master base station and low-altitude cluster slave base station. When the unmanned aerial vehicle flies at low altitude, inter-cluster handover and separation of control beam and service beam in the cluster are realized according to the flight information of the unmanned aerial vehicle and the load condition of the base station (second carrier) in the low-altitude cluster, which solves the service conflict between the ground network and the low-altitude network, reduces the frequent switching of the control beam, improves the unmanned aerial vehicle service throughput, improves the utilization rate of wireless resources of the entire system, improves the network performance and user experience, reduces the network construction and optimization cost, and has good practical value and wide application prospect.

[0165] In addition, the low-altitude communication method provided in the application realizes inter-cluster switching and separation of control beams and service beams in the cluster according to the unmanned aerial vehicle flight information and the low-altitude cluster inner base station load condition, improves the network dynamic management capability in the joint networking of the ground network and the low-altitude network, improves the overall network performance, and improves the wireless resource utilization rate; through dynamic separation of the control beams and the service beams, the network architecture is adjusted in real time, the service conflict between the ground network and the low-altitude network is eliminated, the mutual interference is reduced, and the throughput of the unmanned aerial vehicle service is enhanced; through optimization of the switching strategy, the control beam frequent switching is reduced, the communication quality is improved, the continuity of data transmission is improved, and a more stable and efficient user experience is provided; the optimization switching of the unmanned aerial vehicle in the low-altitude environment is supported, and the flexibility and adaptability of the joint networking of the ground network and the low-altitude network are improved; the directional service beams are dynamically allocated, the system resource optimization is realized, the utilization rate of the system resources is improved, and the network congestion is reduced; the optimization is carried out on the existing 5G+ network, the compatibility is strong, a large-scale reconstruction is not needed, the network construction and optimization cost of the low-altitude network and the ground network is reduced, the fund investment of the operator is saved, and the application value is high.

[0166] In the joint networking scenario of the 5G+ / 6G low-altitude network and the ground network, the low-altitude communication method provided in the application separates the control beams and the service beams in the cluster, reduces the control beam frequent switching, adjusts the network architecture in real time, makes the management and allocation of network resources more flexible, eliminates the service conflict between the ground network and the low-altitude network, reduces the mutual interference, and provides the overall network performance; a new low-altitude base station network structure is provided, the inter-cluster base station mesh structure is combined with the low-altitude cluster inner base station star structure, the network reliability and flexibility are improved. Moreover, based on the unmanned aerial vehicle flight information, the unmanned aerial vehicle flight trajectory is predicted by machine learning, the second carrier load condition (2CC / 3CC) monitoring is introduced, intelligent judgment is made, the switching and selection of the low-altitude base station are optimized, the dynamic selection of the best service connection of the low-altitude terminal is ensured, a more stable and efficient user experience is provided, the directional service beams are selectively and dynamically adjusted according to the unmanned aerial vehicle flight information and the low-altitude cluster inner base station load condition (the beam allocation strategy based on the flight information and the load condition), the continuity of data transmission is improved, the wireless resource utilization rate and the spectrum efficiency are improved. The low-altitude communication method provided in the application is applicable to various broadcast beam configuration combinations (such as 6:2, 5:3, 4:4, etc.), improves the universality and flexibility of the technical solution, dynamically optimizes and adjusts the network architecture and the wireless resources by combining the unmanned aerial vehicle flight information and the real-time load monitoring mechanism, reduces the network construction and optimization cost, and maintains the best performance of the entire network.

[0167] The low-altitude communication method provided in the application can effectively solve the service conflict and co-channel interference in the joint networking of the low-altitude network and the ground network, improve the reliability and stability of the entire network, and improve the satisfaction of ground users and low-altitude users; improve the efficiency of the entire communication system and the communication quality of the unmanned aerial vehicle and the low-altitude network; through inter-cluster switching and separation of the control beam and the service beam in the cluster, the network structure is adjusted in real time, the low-altitude network of a large-scale unmanned aerial vehicle is supported, the spectrum resources are fully utilized, the wireless resource utilization rate is improved, and higher communication capacity and frequency efficiency are realized; through resource reuse and dynamic management, the entire network resource configuration is optimized, the construction, operation and optimization cost of the low-altitude network and the ground network is reduced, and the economic benefit is improved. The low-altitude communication method provided in the application can provide reliable network support for intelligent transportation, smart logistics and agricultural monitoring application scenarios, adapt to different flight conditions, expand the application potential of the unmanned aerial vehicle technology in different fields and different scenarios; the deployment and implementation of the system will promote technological innovation, promote the technological progress and industrial development of the low-altitude network, and promote the popularization of the unmanned aerial vehicle application; through scientific layout and dynamic adjustment, the comprehensive performance and benefit of the overall communication system are improved, and the reliability and flexibility of the future mobile communication system 6G are committed to improving, which provides support for the development of the future network 6G, and has high popularization and application value.

[0168] It should be understood that, although the steps in the flowcharts involved in the embodiments described above are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. 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 flowcharts involved in the embodiments described above 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 executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0169] Based on the same inventive concept, the embodiments of the application also provide a low-altitude communication device for implementing the low-altitude communication method described above. 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.

[0170] In one exemplary embodiment, as shown in Figure 11 A low-altitude communication device 1100 is provided, applied to a first cluster master base station, comprising: an inter-cluster switching request receiving module 1102, a service beam configuration module 1104 and a base station information sending module 1106, wherein:

[0171] Inter-cluster handover request receiving module 1102 is used to receive an inter-cluster handover request forwarded by the second cluster master base station. The inter-cluster handover request is sent by the user equipment to the second cluster master base station.

[0172] The service beam configuration module 1104 is used to control the target cluster slave base station to send low-altitude service beams for user equipment when the first cluster master base station itself does not meet the service requirements corresponding to the inter-cluster handover request. The target cluster slave base station is a cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs that meets the service requirements.

[0173] The base station information transmission module 1106 is used to transmit the first base station information of the first cluster master base station and the second base station information of the target cluster slave base station to the user equipment through the second cluster master base station. The first base station information is used to instruct the user equipment to access the low-altitude control beam transmitted by the first cluster master base station for control signal communication, and the second base station information is used to instruct the user equipment to access the low-altitude service beam for service data communication.

[0174] In an exemplary embodiment, the inter-cluster handover request includes actual motion information of the user equipment; the service beam configuration module 1104 is further configured to determine the predicted motion information of the user equipment based on the actual motion information; generate a beam configuration instruction based on the predicted motion information; and send the beam configuration instruction to the target cluster slave base station, the beam configuration instruction being used to instruct the target cluster slave base station to send a low-altitude service beam for the user equipment.

[0175] In an exemplary embodiment, the service beam configuration module 1104 is further configured to, when the load of the first cluster master base station itself does not meet the service requirements corresponding to the inter-cluster handover request, determine the load of each cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs; determine at least one target cluster slave base station that meets the service requirements from the cluster slave base stations according to the load of each cluster slave base station; and control at least one target cluster slave base station to send low-altitude service beams for user equipment.

[0176] In an exemplary embodiment, the service beam configuration module 1104 is further configured to send the first base station information to the user equipment through the second cluster main base station when the first cluster main base station itself meets the service requirements; wherein, the first base station information is used to instruct the user equipment to access the low-altitude control beam and low-altitude service beam sent by the first cluster main base station.

[0177] In one exemplary embodiment, such as Figure 12 As shown, a low-altitude communication device 1200 is provided, applied to user equipment, including: an inter-cluster handover request sending module 1202 and a beam access module 1204, wherein:

[0178] The inter-cluster handover request sending module 1202 is configured to, in a case where the low-altitude cluster handover triggering condition is met, send an inter-cluster handover request to the first cluster master base station through the second cluster master base station currently performing low-altitude communication.

[0179] The beam access module 1204 is configured to, in a case where the first base station information and the second base station information sent by the first cluster master base station through the second cluster master base station are received, access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and access a low-altitude service beam sent by a target cluster slave base station to perform service data communication.

[0180] The first base station information is base station information of the first cluster master base station, and the second base station information is base station information of the target cluster slave base station. The target cluster slave base station is a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and that meets a service requirement corresponding to the inter-cluster handover request.

[0181] In an exemplary embodiment, the beam access module 1204 is further configured to, in a case where the first base station information sent by the first cluster master base station through the second cluster master base station is received, access the low-altitude control beam and the low-altitude service beam sent by the first cluster master base station.

[0182] In an exemplary embodiment, the target cluster slave base station includes at least one, and the beam access module 1204 is further configured to determine respective signal quality parameters between the target cluster slave base station and the target cluster slave base station, determine a to-be-accessed cluster slave base station from the target cluster slave base stations according to the respective signal quality parameters between the target cluster slave base stations and the target cluster slave base station, and access a low-altitude service beam sent by the to-be-accessed cluster slave base station to perform service data communication.

[0183] In an exemplary embodiment, as shown in FIG. 13, Figure 13 a low-altitude communication apparatus 1300 is provided, which is applied to a second cluster master base station and includes an inter-cluster handover request forwarding module 1302 and a base station information forwarding module 1304. Specifically,

[0184] The inter-cluster handover request forwarding module 1302 is configured to receive an inter-cluster handover request sent by a user equipment, and forward the inter-cluster handover request to a first cluster master base station.

[0185] The base station information forwarding module 1304 is configured to receive first base station information and second base station information sent by the first cluster master base station in response to the inter-cluster handover request, and forward the first base station information and the second base station information to the user equipment.

[0186] Among them, the first base station information is the base station information of the first cluster master base station. The first base station information is used to instruct user equipment to access the low-altitude control beam sent by the first cluster master base station for control signal communication. The second base station information is the base station information of the target cluster slave base station. The second base station information is used to instruct user equipment to access the low-altitude service beam sent by the target cluster slave base station for service data communication. The target cluster slave base station is the cluster slave base station in the low-altitude cluster to which the first cluster master base station belongs that meets the service requirements corresponding to the inter-cluster handover request.

[0187] In an exemplary embodiment, the base station information forwarding module 1304 is further configured to receive first base station information sent by the first cluster main base station and forward the first base station information to the user equipment; wherein, the first base station information is used to instruct the user equipment to access the low-altitude control beam and low-altitude service beam sent by the first cluster main base station.

[0188] Each module in the aforementioned low-altitude communication devices can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the communication device in hardware form or independent of it, or stored in the memory of the communication device in software form, so that the processor can call and execute the corresponding operations of each module.

[0189] In one exemplary embodiment, a communication device is provided, which may be an access network device such as a base station, and its internal structure diagram may be as follows. Figure 14 As shown, the communication device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores various data involved in the low-altitude communication method. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a low-altitude communication method.

[0190] In one exemplary embodiment, a communication device is provided, which may be a user equipment, and its internal structure diagram may be as follows. Figure 15As shown in the figure. The communication device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through the system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the communication device is used to provide computing and control capability. The memory of the communication device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the communication device is used to exchange information between the processor and external devices. The communication interface of the communication device is used to communicate with external terminals in a wired or wireless manner. Wireless mode can be achieved through WIFI, mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. The computer program is executed by the processor to implement a low-altitude communication method. The display unit of the communication device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the communication device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the communication device, or an external keyboard, touchpad or mouse, etc.

[0191] Those skilled in the art can understand that, Figure 14 or Figure 15 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 communication device to which the scheme of the present application is applied. The specific communication device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0192] In one exemplary embodiment, as Figure 16 shown, a low-altitude communication system 1600 is provided, including a user equipment 1602, a first cluster master base station 1604 and a second cluster master base station 1606, wherein:

[0193] The user equipment 1602 is configured to send an inter-cluster handover request to the second cluster master base station when a low-altitude cluster handover trigger condition is met;

[0194] The second cluster master base station 1606 is configured to forward the inter-cluster handover request to the first cluster master base station;

[0195] The first cluster master base station 1604 is configured to receive an inter-cluster handover request forwarded by the second cluster master base station, and in a case where the first cluster master base station itself does not meet the service requirement corresponding to the inter-cluster handover request, control a target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and meeting the service requirement; and send first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the second cluster master base station.

[0196] The second cluster master base station 1606 is further configured to receive the first base station information and the second base station information sent by the first cluster master base station, and forward the first base station information and the second base station information to the user equipment.

[0197] The user equipment 1602 is further configured to receive the first base station information and the second base station information forwarded by the second cluster master base station, access a low-altitude control beam sent by the first cluster master base station for control signal communication, and access a low-altitude service beam for service data communication.

[0198] In an embodiment, a computer readable storage medium storing a computer program is provided, the computer program being executed by a processor to implement the steps in the above method embodiments.

[0199] In an embodiment, a computer program product is provided, including a computer program, the computer program being executed by a processor to implement the steps in the above method embodiments.

[0200] 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 the related data need to comply with relevant regulations.

[0201] 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.

[0202] 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.

[0203] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A method of low-altitude communication, characterized by, The method applied to a first cluster master base station comprises: receiving an inter-cluster handover request forwarded by a second cluster master base station, the inter-cluster handover request being sent by a user equipment to the second cluster master base station; in a case where the first cluster master base station itself does not meet a service requirement corresponding to the inter-cluster handover request, controlling a target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and meeting the service requirement; sending first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the user equipment through the second cluster master base station, the first base station information being used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and the second base station information being used to instruct the user equipment to access the low-altitude service beam to perform service data communication.

2. The method of claim 1, wherein, The inter-cluster handover request comprises actual motion information of the user equipment; and the controlling the target cluster slave base station to send the low-altitude service beam for the user equipment comprises: determining predicted motion information of the user equipment based on the actual motion information; generating a beam configuration instruction according to the predicted motion information; sending the beam configuration instruction to the target cluster slave base station, the beam configuration instruction being used to instruct the target cluster slave base station to send the low-altitude service beam for the user equipment.

3. The method of claim 1, wherein, The controlling the target cluster slave base station to send the low-altitude service beam for the user equipment in a case where the first cluster master base station itself does not meet the service requirement corresponding to the inter-cluster handover request comprises: in a case where a load of the first cluster master base station itself does not meet the service requirement corresponding to the inter-cluster handover request, determining respective loads of respective cluster slave base stations in a low-altitude cluster to which the first cluster master base station belongs; determining at least one target cluster slave base station meeting the service requirement from the respective cluster slave base stations according to the respective loads of the respective cluster slave base stations; controlling the at least one target cluster slave base station to send the low-altitude service beam for the user equipment.

4. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: in a case where the first cluster master base station itself meets the service requirement, sending the first base station information to the user equipment through the second cluster master base station; wherein the first base station information is used to instruct the user equipment to access a low-altitude control beam and a low-altitude service beam sent by the first cluster master base station.

5. A method of low-altitude communication, characterized by, The method applied to a user equipment comprises: in a case where a low-altitude cluster handover triggering condition is met, sending an inter-cluster handover request to a first cluster master base station through a second cluster master base station currently performing low-altitude communication; in a case where first base station information and second base station information sent by the first cluster master base station through the second cluster master base station are received, accessing a low-altitude control beam sent by the first cluster master base station to perform control signal communication and accessing a low-altitude service beam sent by a target cluster slave base station to perform service data communication. The first base station information is base station information of the first cluster master base station, and the second base station information is base station information of the target cluster slave base station.

6. The method of claim 5, wherein, The method further comprises: In a case where the first base station information sent by the first cluster master base station through the second cluster master base station is received, access is made to the low-altitude control beams and low-altitude service beams sent by the first cluster master base station.

7. The method according to claim 5 or 6, characterized in that, The target cluster slave base station comprises at least one, and the access to the low-altitude service beams sent by the target cluster slave base station for service data communication comprises: determining respective signal quality parameters between the target cluster slave base stations; determining a to-be-accessed cluster slave base station from the target cluster slave base stations according to the respective signal quality parameters between the target cluster slave base stations; accessing to the low-altitude service beams sent by the to-be-accessed cluster slave base station for service data communication.

8. A low-altitude communication method characterized by comprising: The method applied to the second cluster master base station comprises: receiving an inter-cluster handover request sent by a user equipment, and forwarding the inter-cluster handover request to a first cluster master base station; receiving first base station information and second base station information sent by the first cluster master base station in response to the inter-cluster handover request, and forwarding the first base station information and the second base station information to the user equipment; The first base station information is base station information of the first cluster master base station, and the second base station information is base station information of the target cluster slave base station.

9. The method of claim 8, wherein, The method further comprises: receiving the first base station information sent by the first cluster master base station, and forwarding the first base station information to the user equipment; The first base station information is used for instructing the user equipment to access to the low-altitude control beams and low-altitude service beams sent by the first cluster master base station.

10. A low-altitude communication apparatus, comprising: The apparatus applied to the first cluster master base station comprises: An inter-cluster handover request receiving module is configured to receive an inter-cluster handover request forwarded by a second cluster master base station, the inter-cluster handover request being sent by a user equipment to the second cluster master base station. A service beam configuration module is configured to, in a case where the first cluster master base station itself does not meet a service requirement corresponding to the inter-cluster handover request, control a target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and meeting the service requirement. The base station information sending module is configured to send first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the user equipment through the second cluster master base station, the first base station information being used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and the second base station information being used to instruct the user equipment to access a low-altitude service beam sent by the target cluster slave base station to perform service data communication.

11. A low-altitude communication apparatus, characterized by comprising: The device applied to the user equipment comprises: The inter-cluster handover request sending module is configured to send an inter-cluster handover request to a first cluster master base station through a second cluster master base station currently performing low-altitude communication, when a low-altitude cluster handover triggering condition is met; The beam accessing module is configured to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication and access a low-altitude service beam sent by a target cluster slave base station to perform service data communication, when the first base station information and the second base station information sent by the first cluster master base station through the second cluster master base station are received. The first base station information is base station information of the first cluster master base station, the second base station information is base station information of the target cluster slave base station, and the target cluster slave base station is a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and which meets a corresponding service requirement of the inter-cluster handover request.

12. A low-altitude communication apparatus, comprising: The device applied to the second cluster master base station comprises: The inter-cluster handover request forwarding module is configured to receive an inter-cluster handover request sent by a user equipment and forward the inter-cluster handover request to a first cluster master base station; The base station information forwarding module is configured to receive first base station information and second base station information sent by the first cluster master base station in response to the inter-cluster handover request and forward the first base station information and the second base station information to the user equipment. The first base station information is base station information of the first cluster master base station, the first base station information being used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, the second base station information is base station information of a target cluster slave base station, the second base station information being used to instruct the user equipment to access a low-altitude service beam sent by the target cluster slave base station to perform service data communication, and the target cluster slave base station is a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and which meets a corresponding service requirement of the inter-cluster handover request.

13. A communication device comprising a memory and a processor, the memory storing a computer program, characterized in that, The processor executes the computer program to implement the steps of the method in any one of claims 1 to 4, claims 5 to 7, or claims 8 to 9.

14. A low-altitude communication system, characterized by The system comprises a user equipment, a first cluster master base station, and a second cluster master base station, wherein: The user equipment is configured to send an inter-cluster handover request to the second cluster master base station, when a low-altitude cluster handover triggering condition is met; The second cluster master base station is configured to forward the inter-cluster handover request to the first cluster master base station; and The first cluster master base station is configured to send first base station information and second base station information to the user equipment through the second cluster master base station, the first base station information being used to instruct the user equipment to access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and the second base station information being used to instruct the user equipment to access a low-altitude service beam sent by a target cluster slave base station to perform service data communication. The first cluster master base station is configured to receive the inter-cluster handover request forwarded by the second cluster master base station, and in a case where the first cluster master base station itself does not meet the service requirement corresponding to the inter-cluster handover request, control a target cluster slave base station to send a low-altitude service beam for the user equipment, the target cluster slave base station being a cluster slave base station in a low-altitude cluster to which the first cluster master base station belongs and meeting the service requirement; and send first base station information of the first cluster master base station and second base station information of the target cluster slave base station to the second cluster master base station. The second cluster master base station is further configured to receive the first base station information and the second base station information sent by the first cluster master base station, and forward the first base station information and the second base station information to the user equipment. The user equipment is further configured to receive the first base station information and the second base station information forwarded by the second cluster master base station, access a low-altitude control beam sent by the first cluster master base station to perform control signal communication, and access the low-altitude service beam to perform service data communication.

15. 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 to 4, claims 5 to 7, or claims 8 to 9.

Images