A systems approach to prediction, compensation and adaptation in wireless networks

This paper presents a framework for provisioning application and channd dependent qu~ty of service in wirdess network-. The framework is based on three Merent adap tation me~anisms that operate over distinct adaptation time scd=. At the pa&et transmission time sc~e, channd prediction determines whether to transmit a packet or not depending on the state of the wird= channd. At the packet schedfig time scale, a channel state dependent schedder compensates flows that experience bad W qurdity wMe attempting to maintain minimum bandwidth G surances. The packet schedfig scheme is complemented by an app~cation-specitic adaptation mechanism that operates over longer time sc~es and takes into account the abdity of fidess app~cations to adapt to changes in adable bandwidth and channd conditions. U*e packet schedding, adaptation takea into account appKcation-levd semantiw and operates over time scales that can be programmed by USfl.