无线传感网络中基于时延感知的背压路由

Delay-Aware Backpressure Routing Algorithm in Wireless Sensor Networks

尽管背压路由优化了传感网络的吞吐量,但其也存在数据包传输时延大的问题。为此,提出基于时延感知的背压路由(Delay-Aware Backpressure Routing,DABR)。DABR路由估算数据包驻留在队列中的时间(驻留时间),并依据数据包队列积压差和驻留时间决策路由,优先传输驻留时间长的数据包,进而在不损害网络吞吐量性能前提下,缩短数据包传输时延。仿真结果表明,提出的DABR路由提升了数据包传输成功率,并降低了数据包传输时延。

Although backpressure routing optimizes the throughput of the sensor network,it also has the problem of large packet transmission delay.Therefore,Delay-Aware Backpressure Routing(DABR)is proposed in this paper.DABR Routing estimate the duration(dwell time)of packets residing in the queue,and make routing decisions based on the packet queue backlog and dwell time,giving priority to the transmission of packets with long dwell time,thus reducing the packet transmission delay without compromising throughput performance.The simulation results show that the proposed DABR route improves the packet transmission success rate and reduces the packet transmission delay.