DF协作无线传感器网络实用跨层设计方案
首发时间:2011-01-25
摘要:针对前向译码(DF)协作无线传感器网络的特点和要求,本文探讨基于分集合并和差错控制两种技术的实用的跨层设计方案。首先,研究支持DF中继协议的协作传感器网络在目的节点采用等增益合并(EGC)的检测方案。通过和传统的最大比合并(MRC)方案以及最近提出的协作MRC方案综合比较,说明等增益合并是一个具有良好性能的实用方案。然后,把物理层的EGC和数据链路层的自动请求重传(ARQ)结合起来,再进行进一步的系统分析。最后,基于EGC和截断ARQ本文提出一种实用的跨层设计方案。
关键词: 无线通信 中继网络 协作分集 等增益合并 前向译码 自动请求重传
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Practical Cross-Layer Design Scheme for DF-Cooperative Wireless Sensor Networks
Abstract:In accordance with the requirements and characteristics of decode-and-forward (DF) cooperative wireless sensor networks, this paper investigates cross-layer design based on diversity-combining and error-control techniques. The detection scheme based on equal gain combining (EGC) at the destination node is first investigated for a cooperative wireless sensor network with DF relaying protocol. It is shown by simulation that the EGC scheme is a good practical solution by comparing with the traditional maximal-ratio combining (MRC) scheme and the new cooperative-MRC scheme. Then the combination of EGC at physical and automatic repeat request (ARQ) at data link layer is analyzed further, and a practical cross-layer design scheme based on EGC and truncated ARQ is finally presented.
Keywords: Wireless communications relay network cooperative diversity equal gain combining decode-and-forward automatic repeat request
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No.4407335286841295****
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