Dynamic spectrum access and management in next generation heterogeneous wireless access networks

下一代无线/移动通信系统正在以异构的愿景开发，其中移动用户/设备将能够同时连接到多个无线网络，如蜂窝无线，WiFi和WiMAX网络。异构无线系统将实现高效的无线资源利用、无缝切换和全球移动性，使移动用户能够无缝连接到互联网。动态频谱共享（DSA）是下一代异构无线接入网中提高无线电频谱利用效率的一种新的设计范式。与传统的静态频谱分配方式不同，DSA采用认知无线电（cognitive radio， CR）技术对频谱进行动态协调并分配给无线接入网（ran）和移动用户。基于DSA的宽带异构无线接入系统的协议工程与体系结构设计是一个新兴的研究领域。这里的主要挑战是从服务供应商的角度有效地管理无线电频谱和其他无线资源，以获得最大容量和提高投资回报，同时满足不同无线服务和应用的需求。提出的研究目标是解决主要架构和协议组件的建模、分析、设计和优化问题，以解决基于动态频谱共享的异构无线接入网中的这些研究问题。拟议的研究结果将产生重大的科学和技术影响。

Next generation wireless/mobile communications systems are being developed with the vision of heterogeneity in which a mobile user/device will be able to connect to multiple wireless networks such as cellular wireless, WiFi, and WiMAX networks simultaneously. Heterogeneous wireless systems will achieve efficient wireless resource utilization, seamless handoff, and global mobility to enable mobile users to connect to the Internet in a seamless manner. Dynamic spectrum sharing (DSA) is a new design paradigm to enhance the radio spectrum usage efficiency in next generation heterogeneous wireless access networks. Different from traditional static spectrum allocation, in DSA, radio spectrum can be dynamically coordinated and allocated to radio access networks (RANs) and mobile users through the use of cognitive radio (CR) technique. Protocol engineering and architecture design for broadband heterogeneous wireless access systems based on DSA is an emerging research area. The major challenge here is to manage radio spectrum and other wireless resources efficiently from the service providers' point of view for maximum capacity and improved return on investment while satisfying the requirements for the different wireless services and applications. The objective of the proposed research is to address the problem of modeling, analysis, design, and optimization of the major architecture and protocol components to address these research issues in a dynamic spectrum sharing-based heterogeneous wireless access network. The results of the proposed research will have significant scientific as well as technological impact.