Z-MAC协议改进算法

An Improved Algorithm of Z-MAC Protocol

为改善Z-MAC协议在不同网络流量下的表现,通过对Z-MAC协议的分析,在该协议原有退避算法基础上,提出了一种基于流量的自适应退避算法。相对于原有算法固定长度的退避窗口,该算法可以根据网络流量的变化动态调整退避窗口的大小,从而提高了协议的灵活性。通过NS2.26软件仿真分析,实验结果表明,该算法在吞吐量、丢包率、延迟等多个方面均优于原有算法。基于流量的自适应退避算法可有效改善Z-MAC协议的性能。

In order to improve the performance of Z-MAC protocol,this paper analyzes a hybrid MAC protocol called Z-MAC,and based on its backoff algorithm we present a new backoff algorithm according to the contention of the network.Compared with the constant backoff window in original algorithm,this algorithm can adjust its backoff window dynamically due to the network traffic.Then analyzed through the NS2.26,the results showed that it is better than using a constant backoff window of Z-MAC protocol in the network delay,energy consumption and throughput.The adjust algorithm can improve the performance of Z-MAC.