中文摘要：

低占空比无线传感网络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,如较长的等待延时等。另外,由于链路质量的原因,一些数据需要多次传输才能成功,这不仅增加能量消耗,而且导致较大的时延问题。为解决这些问题,笔者提出了一种新颖的算法（DEto ERA）,通过计算不同传输模式下的时延和传输成功率选出最佳传输方式,在满足延时要求的情况下节省能量。仿真结果表明,相对于ESL算法,这种算法能更好地节省能量和降低时延。

英文摘要：

Low duty cycle of wireless sensor networks can be effective to improve the life of node in the network. But it brings some problems,such as a longer waiting delay. In addition,as a result of the unreliable link quality,some data need to be transported for many times,so it is not only waste of energy,but also have a long time delay.To solve this problem,a novel algorithm（ DEto ERA） by calculating of time delay of different transport modes and transfer rate to select the best transmission mode has been raising. Saving energy under the satisfying the requirement of time delay. The simulation results show that compared with the ESL algorithm,this algorithm can better save energy and reduce the delay.