Organizing reserve channels for superior admission control performance

Good execution of seamless handoffs is key to the quality of service perceived by mobile service subscribers. Giving priority to handoff requests is a strategy commonly considered to guarantee low connection loss when performing handoffs. Often, priority systems can be implemented by adopting a pool of reserved (or guard) resources that is available only for calls or transactions being handed over. Most studies published thus far consider that fixed allocation of the guard resources is being employed. This work considers sharing the reserve channels among cells through the use of a particular method of dynamic resource allocation (DRA). It is shown here that the use of DRA on the pool of guard channels affords a great reduction in the probability of handoff failure without affecting the value of the new call blocking probability, thereby improving the quality of service provided by the cellular operator and also increasing system utilization.