物联网中考虑节点故障的报文调度方案

Message Scheduling Scheme Considering Node Failure for Internet of Things

在物联网(Io T)环境中,为提升全网系统效率,提出一种考虑节点故障的报文调度方案。利用最短时间调度机制实现报文顺序重排,在节省能量和备份节点部署成本的基础上,通过备份节点选择机制寻找最佳替代节点,缩短报文响应时间。仿真结果表明,该方案能有效降低网络能量消耗及缩短Io T系统报文平均响应时间,并从延长网络寿命角度给出不同节点故障率条件下的Io T最佳备份节点配置数目。

In Internet of Things（IoT）environment,in order to improve the IoT system efficiency,this paper proposes a message scheduling scheme considering node failure.It realizes message order rearrangement by using the shortest time scheduling mechanism.The best alternative node is found through the backup node selection mechanism based on saving energy and reducing the cost of backup node deployment.Simulation results show that the scheme can provide a faster response time of messages and a lower energy consumption of the IoT system.From the perspective of prolonging network life,it also provides the optimal number configuration of IoT backup nodes under the condition of different node failure probability.