Optimal deployment method of unmanned aerial vehicle air base station in rapid recovery of railway emergency communication

Abstract

The invention provides an optimal deployment method of an unmanned aerial vehicle air base station in rapid recovery of railway emergency communication, and belongs to the field of railway communication engineering. The method comprises the following steps: firstly, constructing a position optimization problem of joint ground equipment / facility association and an unmanned aerial vehicle air base station in a two-dimensional space, wherein the target function is obtained by maximizing the total throughput of an air-ground link between the unmanned aerial vehicle and a user, and the constraint conditions are as follows: the throughput of the air-ground link between the unmanned aerial vehicle and the user is not less than a throughput threshold, and the position of the unmanned aerial vehicle is constrained in a fault area; decomposing the problem into two independent sub-problems, namely a user and unmanned aerial vehicle associated sub-problem and an unmanned aerial vehicle position optimization sub-problem; and optimizing and solving the two self-problems by utilizing an iterative algorithm to obtain a final unmanned aerial vehicle deployment position. According to the method, theoptimization position solution of the unmanned aerial vehicle is accelerated, and the emergency communication service capability of the unmanned aerial vehicle can be maximized on the premise that the communication requirements of ground communication equipment are met.

Description

technical field [0001] The invention belongs to the field of railway communication engineering, and specifically refers to a method for optimizing the deployment of unmanned aerial vehicle base stations to quickly restore railway emergency communication. Background technique [0002] The white paper "China's Transportation Development" pointed out that after years of reform and development, my country's multi-node, grid-like, and full-coverage comprehensive transportation network has been initially formed, and the "five vertical and five horizontal" comprehensive transportation channels are basically connected. By the end of 2015, The total operating mileage of my country's railways reaches 121,000 kilometers, ranking second in the world. At the same time, the proportion of operating mileage of high-speed electrified railways is increasing. Therefore, how to ensure efficient and safe operation of railways is a very prominent issue. [0003] Reliable railway communication faci...

AI Technical Summary

Problems solved by technology

Therefore, in this accident, if the UAV can be deployed to the accident site immediately after the failure of the communication facilities, and a temporary emergency communication network can be established with the ground equipment, the relationship between the train control center and the track circuit signal transmitter can be quickly restored. If there is emergency communication among them, then the loss caused by this serious railway traffic accident may be mitigated, and the railway accident may even be avoided

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