Resource Management in Satellite Networks: Optimization and Cross-Layer Design addresses the emergent research area of cross-layer air interface design for satellite systems. A detailed analysis of cross-layer methods is presented along with new analytical and simulation results demonstrating that these techniques can assures high QoS levels for differentiated traffic classes. The research presented integrates the expertise of a wide range of researchers, and addresses all aspects of system design (e.g., propagation issues, resource management techniques, link design, QoS, transport protocols, etc.). Of particular importance is the inclusion of research applicable to both fixed and mobile satellite systems.