Supporting adaptive-QOS over multiple time scales in wireless networks
Javier Gómez, Andrew Thomas Campbell · DIMACS series in discrete mathematics and theoretical computer science · 2000
. For wireless channels, interference mitigation techniques are typically applied at the packet transmission level. In this paper, we presentan adaptive-QOS framework that also responds to impairments over multiple time scales that are present at the #ow#session level. Our framework is based on three di#erent mechanisms that operate over distinct adaptation time scales. At the packet transmission time scale, a channel predictor determines whether to transmit a packet or not depending on the state of the wireless channel. At the packet scheduling time scale, a compensator credits and compensates #ows that experience bad link quality. Over even longer time scales an adaptator regulates #ows taking into account the ability of wireless applications to adapt to changes in available bandwidth and channel conditions. In this paper, we argue that to e#ectively support QOS across wireless links there needs to be interworking or integration between the predictor, compensator and adap...