CN-122002421-A - Method and device for switching mobile communication paths of aircraft

CN122002421ACN 122002421 ACN122002421 ACN 122002421ACN-122002421-A

Abstract

The application provides a method and equipment for switching mobile communication paths of an aircraft, wherein the method comprises the following steps: by constructing a graph model associated with the flight trajectory of the aircraft, the communication base station and the communication link are respectively abstracted into nodes and edges, and then a globally optimal switching path is planned for the aircraft in the model based on a graph theory algorithm. The method overcomes the inherent defect of the local switching strategy based on the instantaneous signal quality in the related art, and can proactively coordinate the resources and states of a plurality of base stations from the whole flight path, thereby systematically reducing the unnecessary switching times, reducing the communication energy consumption of the aircraft, effectively avoiding the access failure or the communication quality degradation risk caused by the insufficient capacity of a target cell, and finally realizing the more reliable, more efficient and more energy-saving mobility management of the aircraft in a complex low-altitude mobile communication environment.

Inventors

LU ZHEN
WANG YULEI
ZHU XUANZI
FAN HUA
HU WENXING
LI GANG

Assignees

中国移动通信集团设计院有限公司
中国移动通信集团有限公司

Dates

Publication Date: 20260508
Application Date: 20260128

Claims (12)

1. A method for switching a mobile communication path of an aircraft, comprising: Constructing a graph model associated with a flight trajectory of an aircraft, nodes in the graph model representing communication base stations associated with the aircraft, edges in the graph model representing communication links between the aircraft and the communication base stations; determining an optimal switching path according to the network state parameters of the aircraft and the graph model; and controlling the aircraft to implement path switching according to the optimal switching path.
2. The method of claim 1, wherein said determining an optimal switching path based on network state parameters of the aircraft and the graph model comprises: setting weights for edges of the graph model, wherein the weights are determined according to at least one network state parameter of a corresponding communication link; Determining staged flight target points based on a preset flight trajectory; Based on an A-star algorithm, taking the weight of the edge of the graph model as a searching cost basis, searching a global optimal path from a current node to the next staged flight target point in the graph model as a part of the optimal switching path.
3. The method of claim 2, wherein the network state parameters include a current air interface resource utilization of the target cell and a handover travel rate characterizing a handover advance effect, the weighting edges of the graph model comprising: And setting weights for edges of the graph model by taking the resource utilization rate of the target cell as a negative decision factor and the switching travelling rate as a positive decision factor.
4. The method of claim 2, wherein determining staged flight target points based on the pre-set flight trajectory comprises: Projecting the preset flight trajectory into a geodetic coordinate system to generate a planar curve; identifying an inflection point in the planar curve; the identified turn points are then sequenced from the start point to the end point, and the staged flight target points are determined.
5. The method according to any one of claims 1 to 4, wherein the constructing a graph model associated with a flight trajectory of an aircraft comprises: Determining the association radius of the communication base station according to the type of the flight area of the aircraft and the working frequency band of the communication base station associated with the aircraft; Based on the association radius of the communication base station and the longitude and latitude positions of the communication base station, screening out the communication base station with the distance from the preset flight track smaller than or equal to the association radius to form a base station association library; And constructing the graph model based on the communication base stations in the base station association library.
6. The method according to claim 1, wherein the method further comprises: Periodically or triggered updating the graph model; The trigger updating is performed when at least one of the base stations involved in the optimal switching path are abnormal in operation, the resource utilization rate of the base stations involved in the optimal switching path exceeds a preset threshold value, or the deviation of the actual flight path of the aircraft from the preset flight path exceeds a preset tolerance range.
7. The method of claim 1, wherein controlling the aircraft to implement a path switch according to the optimal switch path comprises: synchronizing the switching planning scheme corresponding to the optimal switching path to a related ground base station; When the aircraft flies to the switching execution area, the current service base station guides the aircraft to access the target cell based on the switching planning scheme and neighbor cell measurement information reported by the aircraft so as to complete switching.
8. The method of claim 1, wherein the handoff execution area is determined based on a preset receive level threshold, wherein the controlling the aircraft to perform a path handoff according to the optimal handoff path comprises: When the receiving level of the target cell exceeds a first preset level, starting a switching preparation flow; and when the receiving level of the target cell exceeds a second higher preset level, controlling the aircraft to implement path switching according to the optimal switching path.
9. An aircraft mobile communication path switching device, comprising: A building module for building a graph model associated with a flight trajectory of an aircraft, nodes in the graph model representing communication base stations associated with the aircraft, edges in the graph model representing communication links between the aircraft and the communication base stations; the optimizing module is used for determining an optimal switching path according to the network state parameters of the aircraft and the graph model; And the switching module is used for controlling the aircraft to implement path switching according to the optimal switching path.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 8 when the program is executed by the processor.
11. A computer readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, causes the processor to carry out the steps in the method according to any one of claims 1 to 8.
12. A computer program product, characterized in that it stores instructions that, when executed by a computer, cause the computer to implement the steps in the method of any one of claims 1 to 8.

Description

Method and device for switching mobile communication paths of aircraft Technical Field The present application relates to the field of wireless communications, and more particularly, to a method and apparatus for switching mobile communication paths of an aircraft, and related devices. Background The low-altitude economy is coming into the rapid development stage as a national strategic emerging industry. The aircraft is widely applied in the fields of logistics distribution, emergency rescue, urban traffic and the like, and stringent requirements of high reliability, low time delay and high bandwidth are provided for a mobile communication network. However, when the mobile communication system based on the ground base station provides service for the low-altitude aircraft, the traditional mobility management scheme of the mobile communication system faces serious challenges in a complex airspace environment, and the requirements of low-altitude economic large-scale development on communication quality and flight safety are difficult to meet. Currently, the switching management between the aircraft and the ground base station mainly adopts a switching strategy based on signal quality, namely the aircraft measures the signal intensity of surrounding base stations in real time, and a cell with the optimal signal is selected as a switching target. The scheme is mature in ground mobile communication, but has obvious defects in low-altitude application scenes that firstly, an aircraft frequently triggers a switching measurement and execution flow due to wide air propagation environment and serious cell overlapping coverage, so that communication energy consumption is obviously increased, and cruising ability is seriously influenced, secondly, the strategy only focuses on instantaneous signal quality, load conditions of a target cell are not considered, and under a high-density aircraft scene, the aircraft possibly accesses an overload cell, so that communication quality is reduced, even business is interrupted, flight safety is threatened, and furthermore, the existing scheme lacks a global optimization view angle, prospective path planning cannot be carried out by combining a complete track of the aircraft, and resource optimization and switching efficiency improvement on a system level are difficult to realize. Accordingly, there is a need for an aircraft mobile communication path switching method to address the above-mentioned problems in the related art. Disclosure of Invention The application provides a method, a device and related equipment for switching mobile communication paths of an aircraft, which are used for solving the problems of frequent switching, high energy consumption, easy access to an overload cell and lack of integral optimization caused by a traditional switching strategy based on instantaneous signal quality. In a first aspect, there is provided an aircraft mobile communication path switching method, including: Constructing a graph model associated with a flight trajectory of an aircraft, nodes in the graph model representing communication base stations associated with the aircraft, edges in the graph model representing communication links between the aircraft and the communication base stations; determining an optimal switching path according to the network state parameters of the aircraft and the graph model; and controlling the aircraft to implement path switching according to the optimal switching path. In a second aspect, there is provided an aircraft mobile communication path switching device comprising: A building module for building a graph model associated with a flight trajectory of an aircraft, nodes in the graph model representing communication base stations associated with the aircraft, edges in the graph model representing communication links between the aircraft and the communication base stations; the optimizing module is used for determining an optimal switching path according to the network state parameters of the aircraft and the graph model; And the switching module is used for controlling the aircraft to implement path switching according to the optimal switching path. In a third aspect, there is provided an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, implements the steps of the method as described for the aircraft mobile communication path switching method. In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the steps of a method according to the aircraft mobile communication path switching method. In a fifth aspect, a computer program product is provided, characterized in that it comprises computer programs/instructions which, when executed by a processor, perform the steps of the me