Cross-layer design and optimization for next generation wireless networks

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Recent advances in wireless communications show that the interactions of different layers play an important role in wireless networks, and cross-layer design is necessary due to the intrinsic characteristics of wireless networks. Although some work has been done for cross-layer design in wireless networks, most of previous work concentrates on a single air interface standard such as a cellular network. However, in next generation wireless networks, wireless devices are equipped with multiple wireless transceivers for different air interface standards to satisfy the different needs for wide area, local area and personal area wireless networks. Moreover, there has been an explosion of interest in cognitive radio for next generation wireless networks, in which wireless devices can sense their environment and adapt to many frequency bands with multiple transmission protocols. In this framework, the need to consider the interactions of different layers in different air interface standards to develop efficient and effective algorithms that optimize the performance of the integrated wireless networks presents significant technical challenges. The objectives of this research proposal are to address important research problems based on this framework. Our long-term goal involves the study of wireless networks with cognitive intelligence over the air interface jointly across physical, data-link, network, transport and application layers. The research methodology of the work will employ mathematical modeling and analysis techniques to evaluate the effectiveness of the novel schemes. We will also ascertain the practicality of our schemes by pursuing experimental implementations and evaluations. The proposed work will contribute to the advancement of wireless networking technologies through the next generation and beyond. Some of the technologies and techniques resulting from the work may impact the evolution of emerging technical standards or lead to the development of new technical standards. Some results may be suitable for commercialization. The proposed research will also contribute to the training of highly qualified personnel in the information technology, communications and wireless networks fields.