基于满意度的动态频谱分配问题研究

Research on Dynamic Spectrum Allocation based on Satisfaction Degree

针对频谱资源的有效利用问题,提出了利用动态调整频宽技术建立频谱分配模型,通过降低服务等级的方式服务所有的次用户。考虑到物理层协议的重要性,为多个次用户组成的集中认知无线网络设计了一个MAC协议,以满足异构频宽的需求,并来验证动态频谱分配模型。实验结果表明,该模型和固定频宽模型相比,频谱利用率提高了38%,公平度是90%。

In this paper, we propose to use variable instead of predetermined width channel for com- munication and present a novel dynamic spectrum allocation model, which can serve all SUs by means of degrading service. We also design a MAC protocol for centralized cognitive radio network consisted of many SUs with heterogeneous bandwidth demands, experimental results show that variable channel width method increases spectrum utilization more than 38% compared with predetermined channel width method, and fairness index of SUs is about 90% in our model.