低占空比WSN中一种低时延路由协议

摘要

Low duty cycle wireless sensor networks (LDC-WSN)can improve the life of node in the network effectively.But it brings some additional problems,such as a long wait delay and so on.In addition,due to the quality of the link,some data need to be transmitted several times to be successful,not only a waste energy,but also lead to larger delay.In order to solve this problem,this paper proposes a low-latency routing (LLR)algorithm.The algorithm stratifies by node hops to sink node,and calculates the delay of each node to the parent node and parent node to sink node,in order to find the minimum time delay of transmission path to the sink node.The simulation results show that compared to the ESL and LES algorithm,this routing algorithm can better save energy and reduce delay.%低占空比无线传感网络（LDC-WSN）可以有效地提高网络中节点的生存周期。但是它却带来一些额外的问题，如较长的等待时延等。另外，由于链路质量的原因，一些数据需要传输多次才能成功，这不仅浪费能量，而且导致较大的时延。为解决这些问题，提出一种新颖的路由算法 LLR（low latency routing），该算法先根据节点到汇聚节点的跳数进行分层，每一个节点均计算其到父节点的时延以及父节点到汇聚节点的时延，从而寻找一条到达汇聚节点的最低时延的传输路径。仿真结果表明，相对于 ESL 和 LES算法，这种路由算法能更好地节省能量和降低时延。