摘要
针对无线传感器网络协作通信过程中误差传播对系统性能的影响,提出了一种基于机会式误差修正的可靠传输机制。首先,在多节点协作无线传感器网络中建立三种协作传输方案,基于信道质量和误符号率建立协作误差传播模型。接着,针对协作误差中的合并、调度和干扰等类型,通过在信道、信源和协作网络物理层提出机会式误差修正算法。最后,在上述结论基础上,综合感知用户的性能要求、调度复杂度和协作传播模型,提出了机会式可靠传输机制。数学分析结果不仅验证了机会式传输机制比静态机制具有高可靠性,而且证明了所提机制在端到端通信的实时性、可靠性、吞吐率和能效等方面有优越性。
In order to reduce the effect of error propagation in the process of cooperative communica tion in wireless sensor networks （WSNs）, we propose a reliable transmission mechanism based on op- portunistic error correction. First, three cooperative transmission schemes are proposed in the multinode cooperative WSNs, and the model of the cooperative error propagation is established based on channel quality and the symbol error rate. Then, aiming at the cooperative error, such as merging, scheduling, and interference, we propose an opportunistic error correction algorithm based on the chan- nel, source and cooperative networks. Finally, based on the above conclusions, and taking the performance requirements of users, the complexity of scheduling and the model of cooperative communication into account, we propose an opportunity reliable transmission scheme. The results of mathematical analysis not only verify the higher reliability of the proposal than the static mechanism, but also prove its superior performance in real time, reliability, throughput and energy efficiency in end to end communica- tions.
出处
《计算机工程与科学》
CSCD
北大核心
2016年第6期1141-1148,共8页
Computer Engineering & Science
基金
国家创新训练资助项目(GUTP1301009)
四川省教育厅面上项目(112B020)
关键词
无线传感器网络
机会可靠传输
协作误差传播
误差修正
wireless sensor networks （WSNs）
opportunistic reliable transmission
cooperative error propagation
error correction
