自组织网络中带冲突避免的快速邻居发现机制

Fast neighbor discovery mechanism with conflict avoidance in Ad hoc network

邻居发现的速度影响着整个网络组网和通信的效率,现有的邻居发现协议未考虑多个节点同时发送信标时产生信标冲突的情况。针对这个问题,提出了一种有效避免信标冲突的快速邻居发现机制,即在发送信标前,采用载波侦听机制去侦听信道状态,从而减少信标冲突,提高发现效率。同时又采用动态增加唤醒时隙来减少发现时延,加快邻居发现。仿真结果表明,采用该机制无论在占空比对称还是非对称的情况下,都能有效加快现有协议发现速度。

The speed of neighbor discovery affects the efficiency of the whole network and communication. However,existing neighbor discovery protocols does not consider beacon collisions when multiple nodes send beacons at the same time. In view of this situation,this paper proposed a fast neighbor discovery mechanism to avoid beacon collisions. According this,it adopted carrier sense mechanism before transmitting beacon to reduce beacon collisions. At the same time,it dynamically woke up slots control to speed up neighbor discovery. Simulation results show that this method could accelerate the speed of existing protocol discovery in both symmetric and asymmetric scenes.