期刊名称:International Journal of Wireless and Microwave Technologies(IJWMT)
印刷版ISSN:2076-1449
电子版ISSN:2076-9539
出版年度:2011
卷号:1
期号:2
页码:8-15
出版社:MECS Publisher
摘要:In this paper, we address the dynamic spectrum allocation problem in next generation cellular networks under the coordinated dynamic spectrum access (CDSA) model. Firstly, considering spectrum demands of base stations, we formulate spectrum allocation under physical interference models as a nonlinear optimization problem. Then, we propose a demand-driven dynamic spectrum allocation algorithm by transforming this nonlinear optimization problem into linear programming problem. The proposed algorithm first computes initial spectrum allocation and then applies iterative enhancement. Detailed simulations show that the proposed algorithm outperforms the existing algorithms in effective spectrum utilization efficiency and in average satisfaction degree.
关键词:Dynamic spectrum allocation; coordinated dynamic spectrum access; physical interference model