一种服务区分的多媒体传感器网络MAC协议  

A Service Differentiation MAC Protocol for Multimedia Sensor Networks

作　　者：赵亮[1] 陈世平[2] 李钊伟[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]上海理工大学信息化办公室,上海200093

出　　处：《计算机工程》2014年第1期121-125,148,共6页Computer Engineering

基　　金：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)

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。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.

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 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]