摘要
在无线频谱资源分配过程中,历史分配信息通常包含大量有用信息,可为下一阶段的资源分配提供参考借鉴,从而改善资源分配算法的性能。简要介绍了基于图论冲突图理论的网络模型,分析了在感知无线电频谱资源分配算法中引入历史分配信息对算法的影响,构造了代表比例公平性的频谱资源分配算法。仿真结果表明,采用历史信息的算法与原算法相比在系统总带宽、公平性方面都有明显改善,并拥有较好的收敛性。
In the process of radio spectrum allocation, the historical allocation information often contains lots of useful information which can be a reference for future spectrum allocation to improve performance of spectrum allocation algorithm. This paper introduces the cognitive radio network model based on conflict graph in graph theory, analyzes the performance of dynamic spectrum allocation algorithm in cognitive radio when considering historical allocation information, and presents the spectrum allocation algorithm according to proportion fairness. Simulation results show that this historical-informationbased algorithm has better improvement in performance of system sum bandwidth and fairness, and shows good convergence in distributed environment.
出处
《重庆邮电大学学报（自然科学版）》
北大核心
2009年第5期573-577,共5页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金(60872037)
重庆市自然科学基金(2008BB2411)
关键词
历史分配信息
感知无线电
比例公平
动态频谱分配
historical allocation information
cognitive radio
proportional fairness
dynamic spectrum allocation
