Statistical Call Admission Control for IEEE 802.11 Multi-Hop Wireless Ad Hoc Network

In this paper, the authors present a fully distributed model-based Call Admission Control (CAC) scheme for IEEE 802.11 multi-hop ad hoc networks. The scheme predicts the resources that a new call will consume by using both source traffic modeling and link-layer channel modeling, and hence guarantees sufficient network resources for the calls in service. Unlike most of the model-based CAC schemes in the paper, their CAC offers stochastic delay guarantees instead of average delay guarantees for multi-hop multimedia connections, based on the effective bandwidth theory and its dual effective capacity concept. Simulation results show that their scheme combines both efficient resource utilization and delay guarantees to a certain probabilistic limit.