Impact of the boundary effect and the anticipated channel release strategy in mobile microcellular networks

We study the impact of the anticipated channel release (ACR) strategy in the performance of multi-rate transmission mobile microcellular networks. The ACR strategy takes advantage of break-before-make hard handoff characteristics to improve system capacity. We obtain analytical expressions for new call blocking and handoff failure probabilities in the full access system using the multidimensional birth-and-death process. From these expressions, we observe that the anticipated channel release strategy increases the system capacity to m channels, where m is the number of basic channels required by a high-rate traffic call. Moreover, we note that the use of ACR improves the forced termination probability for high-rate traffic calls. Also, we evaluate the performance of the maximum packing algorithm for multi-rate transmission traffic calls under two different simulation topologies. These are the wrapped around topology, which minimizes the boundary effect, and the unwrapped topology, which ignores it. Simulation results obtained using the unwrapped topology compared to those obtained using the wrapped one differ no more than 1.5%