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在无线传感器网络中,延迟是影响实时服务质量的重要因素.为了减少分组在转发过程中的排队延迟,提出一种基于动态优先级的实时分组调度机制(Dynamic Priority Based Real-time Packet Scheduling简写DPRS).在DPRS中,节点的队列被分为三个优先级队列,分别存放紧急分组、延误分组以及普通分组,DPRS在三个队列之间采取优先级调度机制,且根据当前队列的拥塞程度在每个队列内部采取先到先服务(First Come First Service简写FCFS)或后到先服务(Last Come First Service简写LCFS)的调度机制.理论分析和实验对比验证结果表明DPRS能够提高无线传感器网络的实时性.
In wireless sensor network, delay is an important factor affecting real-time quality of service.In order to reduce the delay of packet queuing in the forwarding process, a Dynamic Priority Based Real-time Packet Scheduling (DPRS) In DPRS, a node’s queue is divided into three priority queues, which store emergency packets, delayed packets, and normal packets, respectively. DPRS adopts a priority scheduling mechanism among the three queues, and according to the congestion degree of the current queue Each queue adopts the scheduling mechanism of First Come First Service (FCFS) or Last Come First Service (LCFS). Theoretical analysis and experimental verification show that DPRS can improve the real-time performance of wireless sensor networks Sex.