| 摘要: |
| 针对中继系统中节点快速移动时采用传统中继选择方法造成系统可传输数据量较低
的问题，提出一种联合链路持续时间与平均速率的中继选择方法。该方法首先分析了系统采
用两跳传输及协作传输两种模式下的链路持续时间，分别给出了节点速度及相互之间距离满
足不同条件时的链路持续时间表达式，然后计算两种模式下的链路平均可达速率，最后基于
所提出的准则完成中继选择。仿真结果表明，与传统的中继选择方法相比，该方法可以使系
统获得更多的数据传输，同时具有较低的中断概率。 |
| 关键词: 中继选择 链路持续时间 平均可达速率 中断概率 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目(60972070, 61171111)；重庆市自然
科学基金资助项目(CSTC2009BA2090，CSTC2011jjA40046)；重庆市教委项目基金资助项目(K
J100514) |
|
| A relay selection method of combining link duration with average rate |
| TIAN Zun-kai,TANG Lun,CHEN Qian-bin,GONG Pu |
| () |
| Abstract: |
| To solve the problem of low amount of traffic, which is caused by node
′s fast mobility when the conventional relay selection method is used in the re
lay system, a relay selection method of combining link duration with average rat
e is proposed. First, this method analyses the link duration when dualhop tran
s
mission or cooperative transmission is used, and the link duration expression is
given when node′s velocity and distance are in different conditions. Then the
link average achievable rate is calculated.Finally relay selection is complete
d based on the proposed criterion. Simulation results show that the proposed met
hod can make the system transport more data and lower the outage probability com
paring with conventional method. |
| Key words: relay selection link duration average achievable rate outage probability |
