Proactive Admission Control for IP Networks using Teletraffic Engineering Model

The paper proposes an admission control scheme which reserves network resources on a proactive basis. The current flow arrival and departure patterns are used to determine the future demand for network resources using the telephone networks Erlang-B model. The Erlang model derives the traffic-QoS relationship in terms of the blocking probability of the network resource given the network capacity, its current utilization and future demand. The same principle is remodeled here to suit the IP network. The blocking probability thus measured is used as a flow admission decision parameter. The effectiveness of the scheme over the other flow admission control algorithms is determined here. Detailed simulations of the proposed algorithm result in a higher admission rate and higher bottleneck link utilization at a comparatively lower overhead traffic.