Abstract: Dynamic spectrum allocation provides a promising way out of the underutilization of many licensed frequency bands. However original graph-coloring algorithm is thoughtless for the cognitive user’s demand, which results in excessive allocation of resource to users with less demand and wastes spectrum resource. To solve the problem, a demand-based spectrum allocation algorithm is proposed, to match between channel and user’s demand. The performance simulation demonstrates that compared with the original algorithm, the proposed algorithm can better satisfy demand in the network.

Key words: service demand, graph-coloring, dynamic spectrum allocation, cognitive radio

摘要： 动态频谱分配能有效解决频谱利用率低的问题，但已有的图论着色算法未考虑认知用户的业务需求，导致需求小的用户分配到更大的频谱，一定程度上造成了频谱浪费。为解决该问题，提出基于业务需求的动态频谱分配算法，使分配的信道与认知用户的业务需求适配。性能仿真结果表明，基于业务需求的算法能满足各用户的需求，性能更优。

关键词: 业务需求, 图论着色, 动态频谱分配, 认知无线电

CLC Number: 

• TN929.5