Dual-threshold admission control for non-real-time traffic in wireless data networks
Computer Communications
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Efficient support for multi-class services is a very important issue in integrated wireless and mobile networks because each type of service has distinct characteristics and Quality of Service (QoS) requirements. In this paper, we propose and analyze a new channel allocation scheme for integrated wireless and mobile networks. In our scheme, traffic is grouped into four different classes: originating real-time service calls, originating non real-time service calls, real-time service handoff request calls, and non real-time service handoff request calls. This new scheme can improve the grade of service of higher priority classes while maintaining the required QoS for lower priority classes. An analytical model is developed based on a multi-dimensional Markov chain and validated by simulation results. The closed formula of several important system performance parameters, including blocking probability of originating calls, forced termination probability of real-time service handoff request calls, and averagetransmission delay of non real-time service calls, are obtained.