Different methods of giving priority to handoff traffic in a mobile telephone system with directed retry

Two different ways of giving priority to handoffs in a mobile telephone system with directed retry are discussed. Directed retry considerably decreases the new calls blocking probability at the expense of the handoff failure rate. The first priority method is to reserve channels exclusively for handoff; the other is to use handoff queues. The performance of the method is analyzed by simulations. It is found that appropriately designed handoff queues can lower the handoff failure rate substantially with almost no effect on the new calls blocking probability