一种竞争窗口自适应的多媒体传感器网络MAC协议

Contention Window Adaptive MAC Protocol for Wireless Multimedia Sensor Networks

由于多媒体传感器网络需要实时传输视频、声音和图像等信息,适用于传统无线传感器网络的MAC协议已经不能满足要求。本文针对多媒体传感器网络数据复杂的特性,设计了一种通过改变竞争窗口大小来适应各种流量类型的MAC协议,满足了不同流量类型的QoS需求。最后,针对不同数据类型在时延以及网络吞吐量两个方面做了仿真实验,并且和T-MAC协议在网络能量消耗方面进行了比较。结果表明,新提出的协议在此方面优于T-MAC协议。

Owed to various sensor data need to be transmitted in wireless multimedia sensor networks（WMSNs）,including real-time video,sound,still image,and so on,the traditional MAC protocols in wireless sensor networks（WSNs） cannot satisfy our requirements.Aimed at the complex data in WMSNs,this paper proposes a novel MAC protocol,suitable for all kinds of characteristic of diverse traffic with different quality of service（QoS） factors by varying its contention window.Finally,experiment on end-to-end delay and throughput in different kinds of data.Compared with T-MAC on energy consumption,simulation results show that the new method outperform T-MAC protocol on this aspect.