ABSTRACT
Providing end-to-end quality-of-service (QoS) support is essential for video delivery over the next-generation wireless Internet. This chapter addresses several key elements in end-to-end QoS support for video delivery including scalable video representation, network-aware end system, and network QoS provisioning. There are generally two approaches in QoS support, that is, the network-and the end system-centric solutions. The fundamental problem in a network-centric solution is how to map QoS criterion at different layers, respectively, and optimize total quality across these layers. This chapter first presents a general framework of cross-layer network-centric solution, and then describes the recent advances in network modeling, QoS mapping, and QoS adaptation, which are the key components for network-centric solution. The key targets in end system-centric approach are network adaptation and media adaptation. This chapter first presents a general framework of end system-centric solution and investigates the recent developments. Specifically, for network adaptation, we review the available bandwidth estimation and efficient video transport protocol; for media adaptation, we describe the advances in error control, power control, and corresponding bit allocation. Finally, we highlight several advanced research directions.
