Improving degradation and fairness for mobile adaptive multimedia wireless networks

In this paper, we propose proportional degradation services for multiple classes of adaptive multimedia services in wireless/mobile networks. First, we introduce two novel quality of service (QoS) parameters for the bandwidth degradation: the degradation ratio (DR) and the degradation degree (DD). Then, we propose two measurement-based call admission control (CAC) schemes to satisfy QoS requirements, and to utilize the resource efficiently. They are the window averaging (WA) scheme and the leaky-bucket integration (LBI) scheme. Finally, a K-level proportional bandwidth adaptation algorithm is also proposed to fairly adapt calls´ bandwidth, to minimize DR and DD, to minimize DD with higher priority than to minimize DR, and to guarantee the ratios of service degradation among classes