Full-duplex unmanned aerial vehicle mobile relay system and path optimization method thereof

Abstract

The invention discloses a full-duplex unmanned aerial vehicle mobile relay system based on minimization of outage probability and a path optimization method thereof. The full-duplex unmanned aerial vehicle mobile relay system based on the minimization of outage probability comprises a single antenna source node, a single antenna destination node and a single antenna unmanned aerial vehicle mobilerelay node; wherein the unmanned aerial vehicle mobile relay node operates in a full-duplex decoding and forwarding mode, flies according to a certain path within a specified flight time, and forwardsthe information of the source node to the destination node. The path optimization method establishes a mathematical model considering the flight speed constraints of the unmanned aerial vehicle, taking the unmanned aerial vehicle flight path as the optimization variable, and aiming at minimizing the total interruption probability of the system. The path optimization method uses the first order Taylor series expansion manner to transform the original optimization problem into a standard twice constrained quadratic programming problem, and then solves with the Lagrangian duality theory and thesubgradient method to obtain a closed form solution of the optimal flight path of the unmanned aerial vehicle relay node, which satisfies the minimization of the outage probability.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a full-duplex unmanned aerial vehicle mobile relay system based on the minimization of interruption probability and a path optimization method thereof. Background technique [0002] In recent years, with the rapid development of UAV (Unmanned Aerial Vehicle, UAV) technology, especially the significant reduction in UAV production costs and the miniaturization and integration of equipment, UAVs have moved from the military field to the civilian and industrial fields. The application in is more and more extensive. For example, real-time traffic monitoring, forest anomaly monitoring, agricultural Internet of Things, power line inspection, logistics and cargo transportation, relay emergency communication, etc. According to authoritative forecasts, by 2020, the global commercial UAV market will soar from 2 billion U.S. dollars in 2016 to 127 billion U.S. dol...

AI Technical Summary

Problems solved by technology

[0004] It is worth noting that most of the existing research on UAV mobile relay systems considers the impact of UAV path optimization on the energy consumption and achievable transmission rate of UAV systems, but does not consider System Outage Probability Performance for Delay Sensitive Services

Due to the mobile characteristics of UAVs, the distance between the source and destination nodes will change in real time, which will affect the wireless channel conditions from the UAV nodes to the source and destination nodes. outage probability, which has a greater impact on delay-sensitive services

However, this problem for UAV mobile relay system has not been tackled by researchers

In order to overcome the interruption transmission phenomenon that may be caused by the UAV during the flight, we propose a UAV flight path optimization model based on the minimization of the total system interruption probability, because the objective function in this model is relatively complex and there is no precise analytical expression , so it is very difficult to solve the optimization problem

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