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  • 标题:Demand-Driven Dynamic Spectrum Allocation in Heterogeneous Cellular Networks
  • 本地全文:下载
  • 作者:Li Wang ; Huiyue Yi ; Honglin Hu
  • 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
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