SJ-Scheme: A two-disjoint level priority handoff scheme for integrated multimedia cellular networks

Abstract

The scheme that handles handoff requests in the execution phase of the handoff process greatly affects the performance of a cellular wireless network. Several schemes reserve some fixed number of channels exclusively for these requests. However, this may not lead to efficient resource sharing. Recent schemes make it possible for integrated real-time and non real-time service handoff requests to wait in queues, if no channel is available. Based upon the traffic type, priority of service is applied in varying ways. Here we present the SJ-scheme that is basically a fusion of major characteristics of two priority handoff schemes. With the addition of voice and video handoff requests, the SJ-scheme has efficiently decreased the forced termination probabilities of both voice and video handoff requests while maintaining suitable average overall channel utilization. Meanwhile, considering high traffic cases, the blocking probability of originating real-time service calls is significantly reduced. Furthermore, using the same real-time and non real-time service originating calls' arrival rates (1:1 ratio), our results show that an average queue size of 2 for real-time service handoff requests is sufficient to attain high QoS. Copyright ©2008 by Bo?aziçi University.