无线多媒体传感器网络S-MAC协议的改进与仿真  

Improvement and Simulation of S-MAC Protocol in WMSNs

作　　者：韩帅帅[1] 王宝林[1] 张德海[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电子科技》2015年第1期167-170,共4页Electronic Science and Technology

摘　　要：在无线多媒体传感器网络中,基于竞争的S-MAC协议存在无法使节点的活动时间,根据通信负载动态变化以及节点休眠带来的延迟问题。考虑到WMSNs中的数据流量变化的突发性,为提高网络的时延性能以及吞吐量性能,提出了基于流量负载的动态占空比调整机制(QD-MAC)。针对改进的算法在NS2上进行仿真实验,结果表明,QD-MAC协议不仅能使节点的活动时间适应通信负载的动态变化,还能大幅减少节点休眠带来的延迟。In WMSNs the contention-based S-MAC protocol has the problems that it can not make nodes＇ activetime fit for the dynamic workload and the latency brought about by nodes＇ sleeping. In view of the sudden change inthe flow of data in WMSNs, this paper presents a dynamic duty ratio adjusting mechanism based on the traffic load inorder to improve the network time delay performance and throughput performance. The improved algorithm is carriedout on NS2 simulator. The simulation results show that QD-MAC protocol makes node fitting for the dynamic work-load while reducing the latency caused by nodes＇ sleep.

关 键 词：无线多媒体传感器网络 延迟 QD-MAC算法 

分 类 号：TN92[电子电信—通信与信息系统]