摘要： 研究无线网络中协同动态频谱接入模型下的动态频谱分配问题，在考虑基站频谱需求的基础上，将物理干扰模型下的动态频谱分配问题建模为一个非线性优化问题。通过将非线性优化问题转换为线性规划问题，提出一种无线网络中需求驱动的动态频谱分配算法，计算初始频谱分配，并应用迭代增强算法为节点添加多余信道。仿真结果表明，该算法在有效频谱利用率和平均满意度上都优于现有算法。

关键词: 协同动态频谱接入, 物理干扰模型, 无线网络, 线性规划

Abstract: This paper studies the dynamic spectrum allocation problem in wireless networks under the Coordinated Dynamic Spectrum Access(CDSA) model. Considering spectrum demands of base stations, it formulates spectrum allocation under physical interference models as a nonlinear optimization problem. It proposes a demand-driven dynamic spectrum allocation algorithm in wireless networks by transforming this nonlinear optimization problem into linear programming problem. The proposed algorithm computes initial spectrum allocation and then applies iterative enhancement. Simulation results show that the proposed algorithm outperforms the existing algorithms in effective spectrum utilization efficiency and in average satisfaction degree.

Key words: Coordinated Dynamic Spectrum Access(CDSA), physical interference model, wireless networks, linear programming

中图分类号: 

• TP393