无线网络的差错控制策略及其性能分析  

Performance study of an Error Control Mechanism for Wireless Sensor Networks

作　　者：苟胜难[1] 

机构地区：[1]乐山师范学院计算机科学学院,四川乐山614004

出　　处：《计算机仿真》2011年第5期167-170,231,共5页Computer Simulation

摘　　要：研究网络数据优化传输性能,针对无线传感器网络动态的信道特性、拓扑和带宽有限等特点,要保证输出性能和效率,对网络差错应选择严格控制策略。为了提高无线传感器网络通信的可靠性,提出一种适用于无线传感器网络多媒体数据传输的自适应差错控制策略。策略采用跨层设计的方法,根据链路层数据帧所属应用层视频帧的类型及其发送节点和下一跳接收节点之间的通信距离特性,自适应地选择当前最优的差错控制技术。数学分析表明,策略充分利用无线传感器网络的能量和带宽资源,有效地提高了数据通信的传输效率和可靠性。This paper proposes an Adaptive Error Control Mechanism for wireless sensor networks,in order that the reliability of data transmission could be greatly improved.In a WSN,we are dealing with resource lean sensor nodes and varying channel reliability.Some link layer frames are also more important than others due to communication distance between sending node and next-hop receiving node,and it is belong to video frame type.We propose a hop-by-hop error control algorithm based on the importance of link layer frames and cross-layer design.The algorithm shows that the mechanism can improve the overall efficiency of the communications in a WSN while maintaining an acceptable level of reliability and high energy efficiency.

关 键 词：无线传感器网络 自适应差错控制 链路层数据帧 跨层设计 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]