Dynamic optimization of quality of service in cellular multi-class networks using variable number of guard channels

In this paper we propose a novel strategy for channel allocation in multi-class mobile networks with prioritized handovers, which uses dynamically variable guard channels to improve network utilization under given quality of service (QoS) constraints. We define user classes, each of them with different utilization of network channels. We consider the guard channel policy where certain number of channels is dedicated to handover calls, and also, the policy in which this number of channels is dynamically adapted to the network requirements. Our target is to obtain the influence of this methodology over performance parameters, such as call blocking and call dropping probability. Traffic, network and mobility parameters are also taken into account, such as cell capacity, traffic intensity, as well as number and distribution of subscribers per classes.