一种应用于无人机编队通信的防碰撞方法

无人机编队自组网络类似于Ad Hoc网络,针对无人机编队飞行过程中产生的信息碰撞问题,研究了Ad Hoc网络中最典型的ALOHA协议,对时隙ALOHA算法进行改进。改进的时隙ALOHA将信道分成若干个离散的时隙段,给每个时隙段分配一部分节点进行传输数据。仿真结果表明:在对信道分成2个时隙段,竞争窗口K=2,吞吐量为0.368时,改进后的时隙ALOHA算法中数据包的平均传输次数为1.35,归一化时延约为5.32。与改进前的时隙ALOHA算法相比,系统的归一化传输时延降低,提高了无人机编队飞行时信息传输的有效性。

Anti-collision method of UAV formation communication

UAV formation move network is familiar with Ad Hoc Networks,so for the collision problems of UAV formation flight,which generated from information transmission,this paper studies the most typical ALOHA protocol of Ad Hoc Networks and has enhanced the slotted ALOHA algorithm.The enhanced slotted ALOHA divides the channel into a plurality of discrete time slots sections,and allocates some nodes transmitting data in each time slots section.At the situations of dividing the channel into two time slots sections and the condition in which contention window is 2 and throughput is 0.368,the simulation results show that the average packet transfer times of the enhanced slotted ALOHA algorithm is about 1.35 and the normalized time delay is about 5.32.Compared with the slotted ALOHA algorithm,the normalized transmission time delay of the enhanced algorithm slotted ALOHA system reduces,and this enhanced algorithm increases the effectiveness of the UAV formation information transmission.