含网关节点的高时隙复用率TDMA协议

High time slot multiplexing rate TDMA protocol with gateway nodes

针对网络收敛慢、拓扑表不完整时导致的信道冲突以及空闲时隙浪费问题,提出一种提高节点时隙利用率和网络可靠性的多跳时分多址接入协议。该协议提出3种新机制,使用时隙请求时期快速收敛机制,加快时隙请求时期的收敛;使用空闲时隙公平重用机制,消除中心节点调度时隙碰撞问题,提高空闲时隙利用率;使用一跳邻居多层次调度机制,降低数据重传的时延。仿真结果表明,在时隙请求时期收敛时间、数据传输平均时延及数据传输成功率方面,该协议较现有协议性能更优。

Aiming at the problems of channel conflict and waste of idle time slots caused by slow network convergence and incomplete topology table,a multi-hop time division multiple access protocol was proposed to improve node time slot utilization and network reliability.Three new mechanisms were proposed in the protocol.The fast convergence mechanism of the time slot request period was used to speed up the convergence of the time slot request period.The fair reuse mechanism of idle time slots was used to eliminate the collision problem of central node scheduling time slots and improve the utilization of idle time slots.The one-hop neighbor multi-level scheduling mechanism was used to reduce the delay of data retransmission.The simulation results show that the performance of the proposed protocol is better than that of the existing protocols in terms of time slot request period convergence time,average data transmission delay and data transmission success rate.