The guarantee of QoS for wireless multimedia streams based on adaptive session

Abstract

The guarantee of quality of service (QoS) is a key issue for multimedia streams in wireless multimedia communications.QoS parameters required by most of multimedia streams are ranges or in set, [QoS,,,,,, QoS,,,,J. Computer systems and network systems must, allocate enough resources such as CPU, I/O, memory and bandwidth to meet these QoS parameters. These resources are dynamic variations in availability e.g. bandwidth on radio during multimedia streams transmission. The adaptive session is defined to formularize multimedia stream in this paper. It can allocate resources with QoS,,, during establishment of multimedia stream call and it can dynamic adjust its QoS parameters in [QoS,~ ,,,,, QoS ,,,,, J by PID to adapt the variations in resource availability during multimedia transmission. It not only meets the QoS parameters required, but also improves the useful of resources.

Adoption of the MPEG-21 digital broadcast item model (DBIM) towards QoS metadata management

“…Some parts of MPEG-21 especially to support Digital Rights Management have been used in the Digital Media Broadcast Application Format [21]. Specific QoS related works can be found in [4,5,7,8,19,20].…”