无线传感器网络多信道协议的调度机制

Scheduling mechanism of multi-channel protocol in wireless sensor networks

针对现有无线传感器网络多信道MAC协议没有区分数据业务优先级的问题,提出了一种基于区分服务的多信道协议(DP-McMAC)。该协议采用优先级调度策略和区分服务机制,对不同数据业务设置不同的退避参数和竞争窗口,并对提出的协议进行数学建模及延迟分析。仿真结果表明,该协议在高优先级数据的传输时延和吞吐量等性能方面比现有的协议均有所提高,并且保证了高优先级数据传输的实时性要求。

Considering that the priority of data services is not distinguished in the existing multi-channel MAC layer protocols in wireless sensor networks,this paper proposed a protocol of DP-McMAC.This protocol employed priority scheduling strategy and different service mechanisms by setting different back-off parameters and competition windows for data services with diffe-rent priorities.This paper gave a mathematical modeling and delay analysis about the protocol.Simulation results indicate that the proposed protocol performs better than existence protocols in delay and throughput when the high-priority data come to,it ensures real-time requirements of the transmission.