基于CSMA/CA的无人机自组网容量分析

Capacity Analysis of UAV Ad Hoc Network Based on CSMA/CA Protocol

无人机编队指多无人机协作执行任务的过程中,无人机群保持几何形状排列,如V字形、环形等。采用马尔科夫链节点状态模型,对基于载波侦听多路访问/冲突避免(Carrier Sense Multiple Access with Collision Avoid,CSMA/CA)协议的多接口无人机环形编队自组网容量进行分析,推导出节点包碰撞概率、发包概率和网络吞吐量参数的关系模型,提出了网络容量分析方法。通过仿真验证了网络容量分析方法的合理性,并给出了吞吐量随网络节点数、接口数变化的性能结果以及包碰撞概率、发包概率随接口数、竞争节点数变化的理论特性。

UAV formation refers to the maintenance of geometric shapes among UAVs in the process of multi-UAVs performing tasks collaboratively, such as V-shape, ring, etc. This paper uses the Markov chain node state model to analyze the capacity of multi-radio UAV ring formation ad hoc network based on CSMA/CA(Carrier Sense Multiple Access with Collision Avoid) protocol, derives the relationship model of node packet collision probability, packet sending probability and network throughput parameters, and proposes a network capacity analysis method. The simulation results verify the rationality of the network capacity analysis method, and give the performance results that the throughput varies with the number of nodes and interfaces, as well as the theoretical characteristics of packet collision probability and packet sending probability varying with the interface number and the number of competing nodes.