基于延迟认可算法的认知无线电频谱分配

SPECTRUM ALLOCATION SCHEME BASED ON GALE-SHAPLEY ALGORITHM IN COGNITIVE RADIO

提出两种在认知无线电CR(Cognitive Radio)用户数小于可用频谱数情况下,基于延迟认可算法的认知无线电频谱分配策略。两种策略都基于干扰温度模型,先分别计算CR用户对频谱的优先级排序和频谱对CR用户的优先级排序,然后在可用频谱数量多于CR用户数量情况下,应用延迟认可算法,将检测到的多个频谱分配给CR用户使用。仿真结果表明,通过多次循环分配,该策略能有效地降低分配复杂度,提高算法的收敛速度。

Two kinds of spectrum allocation scheme in cognitive radio （ CR）, both based on Gale-Shapley algorithm and in condition that the CR users are less than spectrums, are proposed in this paper. They are all based on interference temperature model. First, the scheme calculates respectively the priority of CR user to spectrum and the priority of spectrum to CR user. Then it gives CR user the detected spec- trums by means of Gale-Shapley algorithm when the available spectrums are more than CR users. Simulation result demonstrates the scheme reduces effectively the complexity of allocation by circulating allocation repeatedly and improves the speed of convergence.