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计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

一种服务区分的多媒体传感器网络MAC协议

赵 亮a,陈世平b,李钊伟a   

  1. (上海理工大学 a. 光电信息与计算机工程学院;b. 信息化办公室,上海 200093)
  • 收稿日期:2012-11-26 出版日期:2014-01-15 发布日期:2014-01-13
  • 作者简介:赵 亮(1986-),男,硕士,主研方向:无线网络,云计算;陈世平,教授、博士生导师;李钊伟,硕士
  • 基金资助:
    国家自然科学基金资助项目(61170277);上海市教委科研创新基金资助重点项目(12zz137);上海市研究生创新基金资助项目(JWCXSL1102)

A Service Differentiation MAC Protocol for Multimedia Sensor Networks

ZHAO Liang a, CHEN Shi-ping b, LI Zhao-wei a   

  1. (a. School of Optical-electrical and Computer Engineering; b. Office of Information, University of Shanghai for Science and Technology, Shanghai 200093, China)
  • Received:2012-11-26 Online:2014-01-15 Published:2014-01-13

摘要: 为在资源受限的无线传感器网络中传输具有不同业务要求的多媒体信息,提出一种基于服务质量感知和优先级的无线多媒体传感器网络MAC协议——QA-MAC。协议通过有效的服务区分机制,对不同优先级的数据流采用不同的自适应竞争窗口调节方法和占空比调整方法,以保障不同优先级业务的实时传输要求。仿真实验结果表明,与S-MAC协议相比,QA-MAC协议在网络延迟性和数据包传输率方面都有明显提高,随着网络负载的增大,数据包传输率平均可以提高30%以上,能够较好地满足无线多媒体传感器网络应用的需求。

关键词: 服务质量, 优先级, 无线传感器网络, MAC协议, 服务区分, 自适应竞争窗口, 动态占空比

Abstract: In order to deliver multiple types of traffic with different requirements in highly resource constrained Wireless Sensor Networks(WSNs), this paper proposes QA-MAC, a QoS-aware and priority based MAC protocol for Wireless Multimedia Sensor Networks(WMSNs). QA-MAC aims to increase the utilization of the channel with effective service differentiation mechanisms, adaptive contention window and dynamic duty cycle according to different priority flows. It is able to ensure the demand of real-time traffic transmission. Simulations show significant improvements in terms of latency and data delivery. Compared with the S-MAC protocol, as the network load increases, the average packet transmission rate can be increased by more than 30% and it can be applied in many fields.

Key words: Quality of Service(QoS), priority, Wireless Sensor Networks(WSNs), MAC protocol, service differentiation, adaptive con- tention window, dynamic duty cycle

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