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In the emerging context of wireless (mobile) ad-hoc networks, cross-layer design has been proposed in recent years to pursue joint optimization at various layers. Modifications to the OSI reference model have been envisaged in order to allow description of cross-layer solutions. Nevertheless, it can be also observed that a sound and reference methodology does not yet exist to support optimization, and this might severely restrict effective adoption and deployment of cross-layer solutions. In this paper, the authors propose some conjectures about exploitation of OSI-like layered approach to model and design cross-layer solutions. Specifically, they apply their method to the modeling and analysis of a particular class of cross-layer solutions, namely energy-aware routing protocols.
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