认知无线电中基于数据冲突的吞吐量和感知周期均衡  

Throughput Trade-off with Sensing Period Based on Data Collisions in Cognitive Radios

作　　者：姬国庆[1] 朱洪波[1] 

机构地区：[1]南京邮电大学江苏省无线通信重点实验室,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2012年第3期1-4,共4页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)(2007CB310607);国家科技重大专项(2009ZX03003-002;2009ZX03007-003)资助项目

摘　　要：为了实现认知无线电用户的数据吞吐量与感知周期的均衡,在分析主用户数据流量的指数分布模型和认知用户的周期帧结构模型的基础上,建立了相应的数据冲突模型,优化设计了认知用户的感知周期,在尽量降低数据的冲突概率的前提下实现了认知用户吞吐量与感知周期的均衡。通过蒙特卡洛仿真验证了相应的优化设计。There are inevitable data collisions between the primary and cognitive users. There is a trade-off between the sensing period and the system throughput. This paper models the data collision based on the exponential on/off data traffic model and the periodic frame structure of the cognitive radios. The sensing period is optimized and the trade-off between the throughput and the sensing period is achieved with a low probability of the data collision. The results are validated by Monte Carlo simulations.

关 键 词：认知无线电 帧结构 数据冲突 吞吐量 感知周期 

分 类 号：TN911.2[电子电信—通信与信息系统]