Integrated multi-objective cross-layer optimization for wireless multimedia transmission

Many cross-layer design approaches for wireless multimedia transmission over various networks have been proposed. Truly cross-layer design solutions require joint optimization of multimedia coding, transport/network layer, medium access layer, and physical layer transmission strategies and protocols. The solution often becomes impractical because: i) its computational complexity is high, and ii) it needs to be recomputed as some inputs, such as the content characteristics or network conditions change. To this effect, we propose a novel framework for cross-layer design, which features: i) the joint design strategy selection is adaptive not only to network conditions but also to multimedia content characteristics, ii) the joint design strategy selection is based on off-line learning to address the computational complexity issue, and iii) the off-line learning stage employs a new multiple objective optimization solution.