适用于异构QoS环境的伺机频谱接入策略设计  

Opportunistic Spectrum Access Strategy Design in Heterogeneous QoS Environment

作　　者：王凡[1,2,3] 姚富强[2] 赵杭生[2] 冯少栋[1,4] 张建照[1,2] 

机构地区：[1]解放军理工大学通信工程学院 [2]总参第六十三研究所 [3]中国人民解放军73682部队 [4]中国人民解放军96610部队

出　　处：《系统仿真学报》2013年第2期286-292,共7页Journal of System Simulation

基　　金：国家自然科学基金(61072077);江苏省自然科学基金项目(BK2009060)

摘　　要：针对认知无线电网络(Cognitive Radio Network,CRN)中认知无线电(Cognitive Radio,CR)用户单信道伺机频谱接入问题,从既满足CR用户各异的QoS需求又不对主用户(Primary Radio,PR)产生干扰的角度,定义新的度量指标CRN有效吞吐量,并以CRN有效吞吐量最大为目标建立单信道伺机频谱接入模型。提出基于最小速率差额的接入策略,给出相应的信道和功率分配算法(Minimum Rate Gap-based Channel and Power Allocation,MRG-CPA),并设计MAC协议以实现分布式接入。仿真结果表明,与现有的降序最佳适应算法、降序首次适应算法和基于最小速率需求的功率分配算法相比,MRG-CPA不仅提供较大的CRN有效吞吐量,并且提高CR用户QoS保证率。Considering the scenario of cognitive radio Networks （CRN） single channel opportunistic spectrum access, a single channel opportunistic spectrum access model was established which provided CR QoS guarantee and also promised interference-free to primary radios （PR）. The model aimed at maximizing the useful cognitive radio network （CRN） throughput which was a new metric defined. The minimum rate gap-based access strategy was proposed and the corresponding minimum rate gap based channel and power allocation （MRG-CPA） algorithm and MAC protocol was demonstrated. Simulation results show that MRG-CPA provides more useful CRN network throughput as well as improves the CR QoS guarantee rate than existing solutions such as the first Fit Deceasing algorithm, best fit deceasing algorithm and least rate requirement based channel and power allocation algorithm.

关 键 词：认知无线电 单信道接入 伺机频谱接入 信道分配 MAC协议 

分 类 号：TN915.01[电子电信—通信与信息系统]