OSA中基于能量有效性的感知时隙长度优化设计  

Optimization of Sensing Duration Based on Energy Efficiency in OSA

作　　者：张凯[1] 刘洋[1] 李鸥[1] 杨白薇[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2013年第3期325-331,共7页Journal of Information Engineering University

基　　金：国家863计划资助项目(2012AA711);国家科技重大专项资助项目(2008ZX03006)

摘　　要：针对非时隙主网络中机会频谱接入系统,为了在感知性能与传输效率之间进行有效折中选取最优的感知时隙长度,采用连续时间马尔科夫过程对次用户的感知活动进行建模和分析,在满足对主用户的碰撞概率约束的前提下,设计接入策略控制次用户的接入概率,优化感知时隙长度,最大化次用户的能量有效性。仿真结果表明,次用户通过选取最优的感知时隙长度,可使其能量有效传输效率得到优化。The sensing activity of secondary users is modeled and analyzed with continuous time Markov process, aiming at the opportunistic spectrum access （OSA） system in unslotted primary networks, the optimal sensing duration is a trade-off between sensing performance and transmission efficiencies. An access strategy is designed to control access probability of secondary user, which optimizes the sensing duration and maximizes the energy efficiency of secondary user in the precondi- tion of satisfying the collision constraints. Simulation results show that the secondary user can select the optimal sensing duration to optimize the efficient energy transmission efficiency.

关 键 词：认知无线电 机会频谱接入 能量有效性 连续时间马尔科夫过程 感知时隙长度 非时隙主网络 

分 类 号：TN929.5[电子电信—通信与信息系统]