ABSTRACT
This chapter introduces the utility-based bandwidth adaptation for multimedia wireless networks. To deal with multimedia applications with different quality of service (QoS) requirements, multimedia applications are classified into various classes according to their adaptive characteristics. A dynamic time interval reservation strategy is introduced to provide QoS guarantees for handoff calls by adjusting the amount of reserved bandwidth. The utility-maximization bandwidth adaptation scheme provides QoS support in wireless networks containing both real-time multimedia traffic and non-real-time data traffic. According to the bandwidth requirements, the multimedia traffic used in the chapter can be classified into two broad classes: real-time traffic and non-real-time traffic. After mathematical formulation for the bandwidth adaptation processes is given, including bandwidth degrades and bandwidth upgrades, an efficient search-tree-based algorithm is proposed to solve the utility-maximization problem. Simulation experiments have been carried out to highlight the performance of the proposed bandwidth adaptation scheme compared to that of a non-adaptive scheme and rate based borrowing scheme.
