基于车载通信网络的认知无线电信道分配技术的研究

Research on channel assignment technology of cognitive radio based on vehicle communication network

车载通信网络的移动性对无线网络的信道分配提出了高要求,认知无线电技术能适应这一要求。将认知无线电的信道分配技术运用到车载通信网络中,根据实际交通状况对车载通信网络进行建模,主用户和认知用户分别实体化为无线网络用户及车载通信用户;运用协作最大化带宽和(CMSB)算法对认知用户进行信道分配。仿真分析结果表明在给定的车载通信网络模型下,CMSB能极大地优化网络吞吐量,并能保证一定的分配公平性。

The mobility of vehicle communication network requires more for the charmel assignment of wireless network, which cognitive radio can deal with. In this paper, channel assignment technology of cognitive radio is applied to vehicle communication network, vehicle communication network model is built according to real traffic condition, primary users are identified as wireless network users and cognitive users as vehicle communication users. Collaborative Max Sum Bandwidth （CMSB） algorithm is utilized to assign channels to cognitive users. Simulation results show that in the provided vehicle communication network model, CMSB can optimize the throughput of network and guarantee certain fairness.