摘要
认知无线电的频谱分配问题存在瓶颈用户,针对该问题,分析了并行频谱分配算法和CSGC(color-sensitive graph coloring)算法,提出在CMMB(collaborative-max-min-bandwidth)准则下,用并行分配算法来解决瓶颈用户问题,并对系统时间开销和频谱利用率等性能指标进行了仿真分析.结果表明,并行分配算法和CSGC算法的频谱利用情况大致相当,但并行算法的系统时间开销却明显减少,更有利于满足认知无线电中频谱快速分配的要求.
The spectrum allocation in cognitive radio has bottleneck users. To solve this problem, this paper presents the analyses of the parallel spectrum allocation algorithm and CSGC（color-sensitive graph coloring） algorithm, and proposes that the problem of bottleneck users can be solved by parallel spectrum allocation algorithm in the light of CMMB （collaborative-max-min-bandwidth） criteria. Besides, the performance indicators such as the time consuming and the spectrum utilization rate are analyzed and simulated. The simulation result indicates that the frequency spectrum utilization of the above-mentioned two algorithms is almost the same. However, the time consuming in parallel algorithm is much less than that of CSGC algorithm, which is beneficial to meet the requirement of fast allocation of frequency spectrum in cognitive radio.
出处
《应用科技》
CAS
2010年第2期9-11,共3页
Applied Science and Technology
