一种基于频谱供需实时匹配的改进动态频谱分配机制

Improved Dynamic Spectrum Allocation Mechanism Based on Real-time Spectrum Demand and Offer Mapping

无线电技术的发展对频谱的需求越来越迫切,从而促使频谱分配由传统的静态分配向动态分配发展。针对多网络通过中心频谱代理协商接入同一段频谱的应用场景,提出一种基于频谱供需实时匹配的改进动态频谱分配机制。与一般的顺序动态频谱分配方式不同,该机制不再在每一个分配周期重新对各网络进行频谱的重分配,而是根据各网络在前后两个分配周期内的频谱供需变化,进行网络间频谱供应与频谱需求之间的匹配。仿真结果表明,相比于顺序分配动态频谱分配,在牺牲较小的分配增益前提下,各网络频谱切换次数可减少75%以上。

The rapid development of modern wireless communication technology requires more and more spectrum which renders the transaction from static spectrum allocation to dynamic spectrum allocation.Aimed at the question that multiple networks access an coordinated spectrum access spectrum（CSAB） through a central spectrum broker,an improved dynamic spectrum allocation mechanism was proposed based on real-time spectrum demand and offer mapping（RT-DOM）.As contrast with general sequential dynamic spectrum allocation（S-DSA） mechanism,the RT-DOM focuses on the spectrum requirement change between two consecutive dynamic periods,and maps the released spectrum（spectrum offer） and the new spectrum demand,in order to make less the spectrum handover than S-DSA.And the simu-lation results show that the spectrum handover reduces at least 75% while allocation gain reduces very little.