多信道车载网络带宽调制算法  

Channel width adaptation algorithm in multi-channel vehicular networks

作　　者：彭鑫[1] 李仁发[1] 刘樑骄[1] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《通信学报》2010年第11期123-129,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60903019);湖南省科技计划基金资助项目(2010GK3051)~~

摘　　要：针对固定带宽车载网络频谱利用率低的问题,将半定规划法应用于多信道车载自组网带宽调制问题中,提出了一种车载自组网信道带宽调制算法。该算法首先在有频谱竞争的网络中测量相邻车辆间的距离,以确定网络冲突图;然后通过半定规划松弛来协调频谱的争用,最后以此为基础根据链路负载采用比例压缩策略求得频谱调制方案。仿真分析表明,该算法适用于多信道车载自组网,在动态拓扑环境下表现出较好的性能。Aiming at the low utilization of spectrum resource in vehicular networks,an algorithm base on semidefinite programming was presented,which could be utilized to channel width adaptation of multi-channel vehicular networks.Firstly,the algorithm need to measure the distance with the surrounding vehicles to compute conflict graph.And then the semidefinite programming relaxation was employed to coordinate the competition of spectrum resource.Finally,the ultimate channel width adaptation was computed based on the initial channel assignment and compression process.Simulation results demonstrated that the new algorithm not only can promote network throughput,but also perform well on extremely dynamic topology.

关 键 词：车载自组网 带宽调制 半定规划 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]