中文摘要：

随着无线通信技术的飞速发展,传统的静态频谱分配机制与频谱实际需求之间的矛盾日益显著,频谱短缺现象日益严重。频谱资源的利用率问题成为未来移动通信发展的一大瓶颈。有效的信道分配机制能够改善无线资源的使用效率。本文将注水功率分配算法和动态信道分配算法相结合,提出一种基于小区的分布式动态信道分配算法。此算法针对感知无线电网络频谱变化的环境和多业务的环境能够提供优越的性能和自适应能力。与其他基于小区的动态信道分配算法相比,此算法考虑用户之间的公平性,显著提高频谱使用效率。

英文摘要：

Along with dramatic advance in wireless communication technology,the contradiction between traditional static spectrum allocation mechanism and growth in dependence on radio spectrum resources has become more and more unavoidable.A major bottleneck in wireless communication is now emerging with spectrum utilization.Effective channel allocation schemes can improve utilization efficiency of radio resources.In this paper,we propose a cell-based distributed dynamic channel allocation（DCA） algorithm which combines the water filling power allocation algorithm with the DCA algorithm.Our proposed algorithm is an adaptive algorithm providing good performance and adaptability in both the spectrum varying environment and multi-service environment in the cognitive radio network.Compared with the other cell-based DCA algorithms,this novel algorithm considers fairness among users and improves the spectrum efficiency remarkably.