Study of Channel Assignment Strategies for Handoff and Initial Access in Mobile Communication Networks
B.Venkateswara Rao, Vishwanath Sinha · IETE Journal of Research · 2002
An efficient allocation of resources is the key to high system capacity. In this paper, we present a new channel assignment strategy for handover and initial access in a cellular communication network. The objective is to improve the network throughput or the probability of call completion. We develop a model besed on a nonpreemptive priority queueing discipline. New calls, which originate within the cell at a Poisson rate, are queued if all channels are occupied. Handover requests arriving at a Poisson rate are also queued if no channel is available at the time of arrival. Handover requests are served first as soon as channels become available. If the handoff queue is empty, waiting new calls are served. The performance criteria of interest are: probability of call completion, probability of handover dropping, probability of new call blocking and carried versus offered traffic. Our scheme is seen to provide better call completion probability or throughput, less call blocking without much affecting the forced termination and delay, under all traffic conditions.