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A broadband infrastructure for ad hoc networks with optical wireless

Ahmed M Mahdy, University of Nebraska - Lincoln


Among the wide variety of wireless systems, ad hoc networks represent a remarkable and unique kind of wireless communications. The rapid deployment and self organization have turned ad hoc networks into a viable solution to a diverse domain of applications. Ad hoc networking is expected to play a major role in the ‘Any Where Any Time’ generation of future wireless communications. However, existing ad hoc networks are not yet ready for such a transition. In this context, the scalability and broadband capabilities represent major challenges that demand immediate but serious attention. We believe that the infrastructureless organization of ad hoc networks takes a big toll on the performance and related quality features. While current infrastructured ad hoc networks perform more efficiently than those without infrastructure, they still have major problems and cannot ensure a safe leap to the next generation of wireless communications. This leaves the future of ad hoc networks in doubt. ^ In this dissertation, we study major challenges imposed by future ad hoc networks and propose a two-layer broadband infrastructure. The design of the proposed infrastructure is motivated by the role of ad hoc networks in the next generation of wireless systems and the expected demands on high capacity communications. Our objective is to present a novel solution to the scalability and broadband problems by providing two layers of virtual and backbone infrastructure support. ^ The virtual layer addresses major problems with current infrastructured models and provides the network with the support needed for an efficient operation. Within this layer, we propose a novel clustering framework, which can generate customizable multi-measure clustering techniques that can seek specific network quality including stability and load balance. ^ The backbone layer provides a broadband support through an optical wireless network. The optical wireless technology offers a great choice given the nature of ad hoc networks and the function of the backbone layer. However, the use of optical wireless is not straightforward; different challenges need attention, especially within the areas of network planning and operation optimization. We study and prove NP-hardness of major relevant problems and propose novel optimization heuristics. ^

Subject Area

Computer Science

Recommended Citation

Mahdy, Ahmed M, "A broadband infrastructure for ad hoc networks with optical wireless" (2005). ETD collection for University of Nebraska - Lincoln. AAI3162684.