认知无线电自组织网络带宽动态分配多信道MAC协议
首发时间:2014-06-13
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很大提高和改善。
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
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Multi-channel MAC protocol for dynamic bandwidth allocation in CRAHNs
Abstract:A multi-channel MAC (CR-LMAC) protocol for dynamic bandwidth allocation in cognitive radio wireless Ad hoc network is proposed to solve the problem of the classic local cooperative multi-channel MAC protocol (LCM-MAC) that lacks spectrum sensing and dynamic bandwidth allocation. The LCM-MAC protocol is improved by introducing the spectrum sensing capabilities 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.
Keywords: cognitive radio Ad hoc networks MAC protocol spectrum sensing bandwidth allocation
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