认知车载网络中基于QoS保障的频谱共享新策略  

Novel spectrum sharing strategy based on QoS support in cognitive vehicular network

作　　者：张磊[1,2] 罗涛[1,2] 刘蔚[3] 

机构地区：[1]泛网无线通信教育部重点实验室,北京100876 [2]北京邮电大学信息与通信工程学院,北京100876 [3]中国电子科技集团公司第二十研究所,陕西西安710068

出　　处：《通信学报》2011年第11期159-167,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(60872049;60971082;60972073);国家重点基础研究发展计划("973"计划)基金资助项目(2009CB320407);国家重大科技专项基金资助项目(2010ZX03001-003);泛网无线通信教育部重点实验室开放基金资助项目(ZRJJ-2010-5)~~

摘　　要：构建了基于认知无线电的新型车载网络,并提出基于安全业务服务质量(QoS)保障的两步式频谱共享策略:多认知小区间的频谱分配和单认知小区内的频谱共享。仿真结果表明,提出的GNBS(generalized nash bargaining solution)分配方案综合考虑了系统的公平性和总效用,可获得明显大于最大化最小方案的系统和速率,以及明显优于最大化和速率方案的多认知小区间的公平性;GNBS方案可以根据多小区间频谱需求的差异性来动态调节资源分配的比例,有效地实现了需求非对称的多小区间频谱资源的最优化配置;此外,单小区内的协作频谱共享机制,使得协作双方均获得了优于非协作方案的系统效用,有效地提高了系统吞吐量以及认知OBU间的公平性。A two-step spectrum sharing strategy consisting of inter-cell allocation and intra-cell allocation was developed to guarantee the system quality of service（QoS） in the cognitive vehicular network（CVN）.Simulation results indicate that the proposed GNBS scheme considering both the fairness and utility can obtain larger transmission rate than Max-min scheme and achieve much better fairness than Max-rate scheme.Considering the difference of spectrum re-quirements between cognitive cells,GNBS scheme can allocate the spectrum resource dynamically in a weighted fairness manner.Furthermore,the cognitive cooperative spectrum sharing scheme outperforms than the non-cooperative scheme,and it can greatly improve the system utility and fairness between OBU than the non-cooperative schemes.

关 键 词：认知无线电 车载网络 频谱共享 合作博弈 认知协作 服务质量 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]