基于动态控制信道的认知无线电网络MAC协议

摘要

The MAC protocols is mainly used for channel sensing,selection and access control to ensure fairness and effective resource sharing in cognitive radio networks.In view of the research status of the cognitive radio network based on control channel,this paper proposes a cognitive radio network MAC (CR-DCMAC) protocol,which has a dynamic public control channel,based on distributed multi-channel cognitive radio network MAC protocol (CR-MMAC),introducing the synchronization mechanism,not waiting for transport mechanism and not reiterating mechanism.It can reduce the channel resources costs and the amount of control group on the control channel.The simulation results show that CR-DCMAC agreement can improve system total throughput and the utilization rate of idle spectrum resource,and it is better than that of CR-MMAC agreement on the comprehensive performance.%在认知无线电网络中,MAC协议主要用于信道资源的感知、选择以及接入控制从而保证公平性和有效的资源共享.针对认知无线电网络基于控制信道的研究现状,文中在认知无线电网络分布式多信道MAC (CR-MMAC)协议的基础上,引入同步机制,不等待传输机制和不重申机制,提出一种基于动态公共控制信道的认知无线电网络MAC (CR-DCMAC)协议.它能够减少信道资源开支,降低控制信道上的控制分组量.仿真结果表明,CR-DCMAC协议能提高系统总吞吐量和空闲频谱资源的利用率,综合性能优于CR-MMAC协议.