一种适用于698～806MHz频段的认知MAC协议  

A cognitive radio based MAC protocol for Band 689～806 MHz

作　　者：江帆[1] 张晓燕[1] 关璐[1] 卢光跃[1] 

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2014年第5期5-9,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：陕西省自然科学基础研究计划基金资助项目(2011JK8027);陕西省教育厅科学研究计划基金资助项目(2013JK1064);工信部通信软科学基金资助项目(2014R33)

摘　　要：针对广播系统与认知系统共存场景下的认知用户接入问题,提出一种适用于698～806MHz频段的认知MAC协议。该协议以分布式的方式对授权信道侦听,认知用户之间以协调的方式共享信道侦听结果,并采用基于竞争的方式接入空闲授权信道。利用蒙特卡洛仿真方法对所提出的协议进行了仿真。仿真结果表明,与传统MAC协议相比,该协议能够有效提高授权频段的频谱利用率,提升系统性能。A cognitive radio based MAC protocol for 698～806MHz is presented in this paper to address user access issues in the environment where the broadcast system and cognitive radio sys-tem coexist.In this proposed scheme,the authorized bands is sensed in a distributed way,and the spectrum sensing information can be shared coordinately among secondary users.The unused authorized bands can be accessed by secondary users effectively in a competitive manner.Monte Carlo simulation method is used for scheme evaluation.Simulation results show that compared with the traditional algorithm,the proposed protocol can efficiently improve spectrum utilization rate in authorized frequency bands and therefore improve system performance.

关 键 词：认知无线网络 动态频谱接入 689~806MHz 媒体接入控制 

分 类 号：TN929.52[电子电信—通信与信息系统]