摘要
在协作中继网络中提出一种基于(Quality-of-Service,QoS)驱动的协作节点传输时间和协作节点位置优化算法。基于当前用户的QoS时延需求,从理论上可推导出解码转发中继模式下系统容量表达式。以最大化系统容量为目标,可获得最优的协作节点传输时间和最优的协作节点位置。仿真结果表明,该优化算法能够自适应地确定最优节点的位置和传输时间,从而获得最大化系统容量,进一步有效提升整个系统的性能。
A QoS-driven optimization algorithm is presented for cooperative relay networks.Under DF（Decode and Forward） cooperative relaying mode,the closed-form expressions of the system capacity subject to a given delay QoS constraint are derived theoretically.A new scheme of choosing the optimal distance and the optimal transmission time from the source to relay is proposed to maximize the throughput of the cooperative relay network.Simulation results show that,the proposed scheme works effectively and the system＇s performance can be improved a lot.
出处
《西安邮电学院学报》
2011年第1期11-15,44,共6页
Journal of Xi'an Institute of Posts and Telecommunications
基金
新世纪优秀人才支持计划项目(NCET-08-0891)
陕西省自然科学基金资助项目(2010JQ80241)
关键词
协作中继网络
QOS
联合优化
协作分集
cooperative relay network
Quality-of-Service（QoS）
joint optimization
cooperative diversity
