Prediction-Based Admission Control for DiffServ Wireless Internet

Future wireless Internet will consist of different wireless technologies that should operate together in a consistent way to provide seamless quality of service to wireless users. In this paper, a wireless cellular architecture overlaid with DiffServ domains is considered. We propose a flexible hierarchical framework for admission control based on this architecture which aims to keep the handoff dropping probability below a target level while maximizing the network utilization. The novelty of our proposal is that (1) our prediction-based admission control scheme considers not only intra-domain but also interdomain handoffs, while (2) it is based on on-line bandwidth requirement prediction, and (3) benefits from different priorities among different service classes to improve the network utilization by accommodating high-priority handoffs at the expense of dropping low-priority calls. Simulation results show that our scheme outperforms the basic trunk reservation scheme with domain and cell-level reservations.