中文摘要：

一台新奇分布式的认知收音机在普通控制隧道外面的多信道的中等存取协议被建议。协议为分别地交换控制信息和数据把传播间隔划分了成二部分。除了评估建议协议的系统浸透产量，一三维多，在动态光谱存取描述认知用户(CU ) 的 sate 的隧道 Markov 链模型被介绍。建议分析被用于计划采用了由的包传播基本，在正常 IEEE 采用的 RTS/CTS 存取机制 802.11。分析二个方法的优点，混合存取机制被建议改进系统产量。实验结果的模拟结果表演接近模型(不到 5%) 计算的值，并且建议协议显著地由借准许的光谱改进系统产量的性能。由在系统参数上分析产量的依赖，动态地选择存取机制的混合机制能维持高产量。

英文摘要：

A novel distributed cognitive radio multichannel medium access protocol without common control channel was proposed. The protocol divided a transmission interval into two parts for exchanging control information and data, respectively. In addition to evaluating system saturation throughput of the proposed protocol, a three-dimensional multi channel Markov chain model to describe the sate of the cognitive users （CUs） in dynamic spectrum access was presented. The proposed analysis was applied to the packet transmission schemes employed by the basic, RTS/CTS access mechanism adopted in the normal IEEE 802.11. Analyzing the advantage of the two methods, a hybrid access mechanism was proposed to improve the system throughput. The simulation results show that the experiment results are close to the value computed by the model （less than 5%）, and the proposed protocol significantly improves the performance of the system throughput by borrowing the licensed spectrum. By analyzing the dependence of throughput on system parameters, hybrid mechanism dynamically selecting access mechanism can maintain high throughput .