认知无线Mesh网中基于马氏决策模型的MAC协议  

Markovian Decision Model Based MAC Protocol in Cognitive Wireless Mesh Networks

作　　者：费洪海[1] 章国安[1,2] 范盛超[1] 

机构地区：[1]南通大学电子信息学院,江苏南通226019 [2]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电视技术》2012年第17期114-118,共5页Video Engineering

基　　金：国家自然科学基金项目(60872002);江苏省高校自然科学基金项目(11KJB510021;10KJB510021);南通市科技计划项目(HS2011015;BK2011017);南通大学研究生科技创新计划项目(YKC10022)

摘　　要：为解决认知无线Mesh网络中专用控制信道较难获得的问题,提出一种基于POMDP的机会式频谱接入MAC协议,在不需要中心控制器和专用控制信道的协调下,实现动态频谱感知和接入。仿真结果表明,基于POMDP的接入策略能够有效提高网络频谱利用率和吞吐量,性能最优,而基于贪心算法的接入策略,在降低计算复杂度的同时,获得了较好的性能,实用性较强。To resolve the problem that the dedicated control channel is difficult to be acquired in cognitive wireless Mesh networks, a MAC protocol for Opportunistic Spectrum Access（OSA-MAC） based on Partially Observable Markov Decision Process（POMDP） is proposed where secondary users realize dynamic spectrum sensing and access without a central coordinator or a dedicated control channel. Simulation results show that the access strategy based on POMDP can significantly improve the network spectrum efficiency and throughput with the best performance. Access decision based on greedy algorithm can reduce computational complexity as well as get the better performance, so it has strong practicability.

关 键 词：认知无线Mesh网络 机会式频谱接入 部分可观察马氏决策过程 贪心算法 

分 类 号：TN92[电子电信—通信与信息系统]