动态频谱访问无线网络的研究展望

Research on Dynamic Spectrum Access Wireless Networks

动态频谱访问技术能有效解决无线通信中频谱稀缺与频谱利用率低的问题。该文介绍了频谱开放的趋势以及认知无线电、超宽带等相关无线电技术,描述了动态频谱访问网络的体系结构,从频谱侦听、频谱分析、频谱共享、频谱切换等方面探讨了动态频谱访问网络的资源管理,介绍了其路由、传输层、QoS协议设计,给出了研究方向。

Dynamic spectrum access（DSA） networks provide a promising way out of the dilemma of spectrum scarcity and the underutilization of many licensed frequency bands. This paper introduces the trend of open spectrum and the enabling radio technology cognitive radio and ultra-wideband. It discusses the architecture of DSA networks and introduces their radio resource management from the aspects of spectnun sensing, spectrum analysis, spectrum sharing and spectrum handoff. The routing, transport and QoS protocol design are discussed. The future research issues of DSA networks is investigated.