中文摘要：

无线传感器网络路由协议通过点到点的重传来提高数据传输的可靠性,其重传机制没有考虑不同业务数据的可靠性需求差异,统一设定一个静态的最大重传次数。本文提出了一种动态重传算法,为每种业务分别根据其可靠性需求动态设定最大重传次数。对于较低可靠性需求的业务,相比于传统重传机制减少了重传次数。仿真表明动态重传算法能有效降低网络能耗。

英文摘要：

Routing protocols for wireless sensor networks increase the transmission reliability through point-to-point packet retransmission mechanism.The mechanism doesn＇t take into account differences of reliability requirements of different types of tasks,and the network sets a static maximum number of retransmissions.This paper presents a dynamic retransmission algorithm.It sets the maximum number of retransmissions for each task according to its reliability requirement.For lower reliability requirement task,comparing to the traditional mechanism,the dynamic algorithm can reduce more number of retransmissions.Simulation results show that the dynamic algorithm can effectively reduce network energy consumption.