ABSTRACT
In this chapter, we review the recent advancements ofmultimedia applications overmobileworldwide interoperability for microwave access (WiMAX), and study the multimedia delivery challenges and transmission strategies over mobile WiMAX networks. The generic multimedia transmission problem over mobile WiMAX networks is abstractly formulated as a cross-layer resource allocation problem. We further consider image transmission as a particular example, discussing an 802.16e protocol compliant resource allocation scheme to optimize reconstructed image quality with strict delay constraints. The focus of this chapter is in threefolds: (1) we provide a comprehensive review of state-of-the-artmultimedia delivery optimization techniques overWiMAX networks, and summarize them in a cross-layer based multimedia resource allocation fashion; (2) we further discuss a new position-value oriented resource allocation paradigm for image transmission, which allows more efficient unequal error protection; (3) we also discussWiMAX format compliant resource allocation schemes, identifying fragmentation and selective repeat automatic repeat request (SR-ARQ) as optimization strategies without violating the standardized components in 802.16e. Extensive simulation studies are also provided to show the comparative analysis of quality-latency performance between the position-based resource allocation approach and layer-based approaches.
