基于瞬时信道状态信息的串行多中继选择方法  

Serial multiple relay selection method based on instantaneous CSI

作　　者：韩维稼[1] 陈前斌[1] 唐伦[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《计算机应用研究》2010年第6期2211-2214,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(60972070);新世纪优秀人才支持计划资助项目(NCET-06-0778)

摘　　要：提出了一种分布式串行多中继选择方法。该方法涉及MAC层协议,在RTS包中添加一个字段F,用于存储选择中继的个数,并通过广播RTS和CTS包获得中继节点的前、后向信道质量的瞬时测量值,再通过定时和广播flag包实现在时间上串行选择多个中继。推导了瑞利衰落下串行多中继选择的碰撞概率式,仿真并对比了最优中继选择和串行双中继选择的碰撞概率。结果表明,碰撞概率在可容忍的范围内,该方法切实可行。This paper proposed a distributed serial multiple relay selection method based on instantaneous channel state information（CSI）. It involved MAC layer’s protocols, added field F to RTS package and used to storage the numbers of selected relays,and acquiring the instantaneous measurements of relay’s backward, forward channel quality by broadcasting RTS and CTS packages,then exploited timing and broadcasting flag package to achieve time serial multiple relay selection. It derived the collision probability formula of this method with Rayleigh Fading, and conducted computer simulations to show the collision probability of best relay selection and serial two relay selection. Simulations demonstrate that the collision probability is within the range of tolerance and the new method is feasible.

关 键 词：串行 多中继选择 MAC层 碰撞概率 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]