A New Queueing Policy for Handoff Calls with Finite Queue Size in Wireless Cellular Networks

In cellular network, dropping probability of handoff calls (Pd) and blocking probability of new calls (Pb) are two important QoS measures. In this paper, focusing on the problem of how to minimize blocking probability of new calls with guaranteed dropping probability of handoff calls, a new priority queueing policy with finite queue size is proposed. And a two-steps algorithm is developed for optimizing queue size of the proposed policy and other parameters, so as to achieve the minimum value of Pb. In addition, recursive formulas are derived to deal with complexity of computing Pd and Pb. Both theoretical analysis and numerical results show that proposed policy could effectively minimize blocking probability of new calls with guaranteed dropping probability of handoff calls.