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Issue No.01 - January-March (2003 vol.2)
pp: 65-75
ABSTRACT
<p><b>Abstract</b>—In this paper, we propose an analytical model for integrated real-time and non-real-time service in a wireless mobile network with priority reservation and preemptive priority handoff schemes. We categorize the service calls into four different types, namely, real-time and non-real-time service originating calls, and real-time and non real-time handoff service request calls. Accordingly, the channels in each cell are divided into three parts: one is for real-time service calls only, the second is for non-real-time service calls only, and the last one is for overflow of handoff requests that cannot be served in the first two parts. In the third group, several channels are reserved exclusively for real-time service handoffs so that higher priority can be given to them. In addition, a real-time service handoff request has the right to preempt non-real-time service in the preemptive priority handoff scheme if no free channels are available, while the interrupted non-real-time service call returns to its handoff request queue. The system is modeled using a multidimensional Markov chain and a numerical analysis is presented to estimate blocking probabilities of originating calls, forced termination probability, and average transmission delay. This scheme is also simulated under different call holding time and cell dwell time distributions. It is observed that the simulation results closely match the analytical model. Our scheme significantly reduces the forced termination probability of real-time service calls. The probability of packet loss of non-real-time transmission is shown to be negligibly small, as a non-real-time service handoff request in waiting can be transferred from the queue of the current base station to another one.</p>
INDEX TERMS
Analytical model, blocking probability, forced termination probability, handoff, integrated service, mobile networks, preemptive reservation, priority, real-time/ non-real-time, transmission delay.
CITATION
Jingao Wang, Qing-An Zeng, Dharma P. Agrawal, "Performance Analysis of a Preemptive and Priority Reservation Handoff Scheme for Integrated Service-Based Wireless Mobile Networks", IEEE Transactions on Mobile Computing, vol.2, no. 1, pp. 65-75, January-March 2003, doi:10.1109/TMC.2003.1195152
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