摘要
无线传感网发射功率受限,采用中继通信的方式可以扩展通信覆盖区域,中继选择是其关键技术之一。不同的中继选择策略会对中断概率产生不同的影响,其一是选择候选集合中的所有节点作为中继节点,其二是选择候选节点中的信噪比最大的节点作为中继节点。为了比较这两种中继选择策略的性能,推算了两种策略下的中断概率闭合表达式,并进行数值分析。结果表明,在不考虑功耗平衡的前提下,策略二的性能优于策略一。
Wireless sensor networks are always constrained by transmission power,therefore relay communication is often used to expand coverage,the selection of relay is one of key technologies in relay communication.Different relay selection schemes generate different influences on outage probability,the 1st scheme selects all nodes of the candidate nodes,the 2nd one selects the node with the highest SNR.The close form formulae of the two schemes are derived and analyzed numerically.The results indicate that the 1st scheme outperforms the 2nd one without consideration of power consumption balance.
出处
《现代电子技术》
2010年第21期35-37,40,共4页
Modern Electronics Technique
基金
南京信息职业技术学院2010年科研基金资助
关键词
协同通信
中继选择
中断概率
最佳中断
cooperative communication； relay selection； outage probability； best relay；
