Comparative Evaluation of Adaptive Trunk Reservation Schemes for Mobile Cellular Networks

We propose a novel adaptive reservation scheme designed to operate in association with the well-known Multiple Guard Channel (MGC) admission control policy. The scheme adjusts the MGC configuration parameters by continuously tracking the Quality of Service (QoS) perceived by users, adapting to any mix of aggregated traffic and enforcing a differentiated treatment among streams during underload and overload episodes. We provide two implementations of that scheme. The numerical evaluation performed confirms that the QoS objective is met with an excellent precision. We compare our adaptive scheme with two previously relevant proposals of this approach in a single service scenario. The comparative performance evaluation carried out verifies that our scheme outperforms the two previous proposals in terms of both of carried traffic and convergence speed to new operating conditions. Other key features of our scheme are its simplicity, its oscillation-free behavior, and its integrated strategy to deal with multiservice scenarios.