认知无线电自组织网络带宽动态分配多信道MAC协议  

Multi-channel MAC protocol for dynamic bandwidth allocation in CRAHNs

作　　者：高培勇[1] 陈靖[1] 朱清超[1] 康巧燕[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《中国科技论文》2014年第4期375-379,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(61201209)

摘　　要：针对目前经典的本地协作多信道MAC协议(LCM-MAC)缺乏频谱感知和带宽动态分配问题,提出一种认知无线电自组织网络(cognitive radio Ad hoc networks,CRAHNs)带宽动态分配多信道MAC(CR-LMAC)协议。通过引入频谱感知机制和新的带宽分配策略模型,改进LCM-MAC协议,使其具备空闲信道感知和动态分配带宽的自适应能力。仿真结果表明,改进后的协议性能优于LCM-MAC,在网络总吞吐量和端到端时延等方面有较大提高和改善。A multi-channel MAC （CR-LMAC）protocol for dynamic bandwidth allocation in cognitive radio wireless Ad hoc net-work is proposed to solve the problem of the classic local cooperative multi-channel MAC protocol （LCM-MAC）that lacks spec-trum sensing and dynamic bandwidth allocation.The LCM-MAC protocol is improved by introducing the spectrum sensing capa-bilities and a new bandwidth allocation strategy model into its framework and has the adaptive ability of sensing idle channel and dynamically allocating bandwidth.Simulation results show that the improved protocol has a great improvement in overall network throughput and the end to end delay,and has a better performance than the original LCM-MAC protocol.

关 键 词：认知无线电自组织网络 媒体接入控制协议 频谱感知 带宽分配 

分 类 号：TN925[电子电信—通信与信息系统]