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

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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.