认知无线网络MAC协议的控制信道建模

Control Channel Modeling for MAC Protocol in Cognitive Radio Network

针对认知无线网络媒体接入控制(CRN-MAC)协议的控制信道饱和问题,提出一种控制信道建模方案。引入控制信道门限的概念,根据协议超帧、控制子帧、数据子帧的时间约束关系,建立控制信道门限的定量分析模型,得出门限值的数学表达式。应用定量分析模型评价CCMAC协议的理论网络吞吐量。仿真结果验证了该模型的有效性,并给出网络吞吐量与CCMAC协议参数之间的数值关系。

To address the control channel saturation problem of Cognitive Radio Network Medium Access Control（CRN-MAC） protocol,a modeling scheme for control channel is proposed.The concept of Control Channel Threshold（CCT） is introduced,and according to the time constraints of superframe,control subframe and data subframe,a CCT model with computational equation is presented.The theoretical throughput of Control-Channel-based MAC（CCMAC） protocol is evaluated on the basis of the proposed model.Simulation results demonstrate the effectiveness of the model,and the network throughput is analyzed while changing parameters of the CCMAC protocol.