›› 2015, Vol. 28 ›› Issue (1): 167-.

• 论文 • 上一篇    下一篇

无线多媒体传感器网络S-MAC协议的改进与仿真

韩帅帅,王宝林,张德海   

  1. (西安电子科技大学 电子工程学院,陕西 西安 710071)
  • 出版日期:2015-01-15 发布日期:2015-01-22
  • 作者简介:韩帅帅(1989—),男,硕士研究生。研究方向:无线多媒体传感器网络。E-mail:958505187@qq.com

Improvement and Simulation of S-MAC Protocol in WMSNs

HAN Shuaishuai,WANG Baolin,ZHANG Dehai   

  1. (School of Electronic Engineering,Xidian University,Xi'an 710071,China)
  • Online:2015-01-15 Published:2015-01-22

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。

关键词: 无线多媒体传感器网络, 延迟, QD-MAC算法

Abstract:

In WMSNs the contention-based S-MAC protocol has the problems that it can not make nodes' active time fit for the dynamic workload and the latency brought about by nodes' sleeping.In view of the sudden change in the flow of data in WMSNs,this paper presents a dynamic duty ratio adjusting mechanism based on the traffic load in order to improve the network time delay performance and throughput performance.The improved algorithm is carried out on NS2 simulator.The simulation results show that QD-MAC protocol makes node fitting for the dynamic workload while reducing the latency caused by nodes' sleep.

Key words: wireless multimedia sensor networks;latency;QD MAC algorithm

中图分类号: 

  • TN92