一种动态频谱共享通信系统接入控制算法

Access control algorithmic for dynamic spectrum sharing communication system

针对动态频谱共享通信系统的MAC设计,设计了集中式网络环境下的MAC帧结构,提出了一种基于接入点延时反馈竞争信道信息的时隙ALOHA访问控制算法。在分析时隙ALOHA算法的稳定性基础上,提出使用倍乘因子与伪贝叶斯算法相结合的方法以保证系统的稳定性。仿真结果表明,当发送概率与实际值相差较大时,该算法能达到快速调整的效果,获得稳定的吞吐量。

Towards the MAC design of the dynamic sharing spectrum communication system,this paper proposed a new MAC frame structure which could be used in centralized networks.And designed a stotted ALOHA access control algorithm based the feedback competition CSI （channel state information） of access users.Then through analyzing the delay features and the stability,found a new solution to assure the system stable,which was the combination of pseudo-Bayesian algorithms and the multiple factor.Simulation demonstrates that the algorithm can accelerate the adjusting speed and acquire stable throughput on the conditions that there is distinct difference between the probability of transmitting and the real.