A channel allocation scheme with dynamic priority for wireless mobile networks

A channel allocation scheme based on the technique of a guard channel employing dynamic priority with three queues (DPTQ) is proposed. DPTQ differs from most previously proposed schemes which focused only on reducing forced-termination for handoff calls. It tries to reduce blocking/dropping probabilities for new calls and data calls with a tolerable forced-termination probability for handoff calls in wireless networks. This scheme is especially suitable for operation in a hot spot in which fewer handoff calls may occur. In order to compare our scheme with the previously proposed dual-threshold bandwidth reservation (DTBR) scheme, in which no queue is employed, three queues are endowed with DTBR to form a dual-threshold with three queues (DTTQ) scheme. Through numeral comparisons, we show that DPTQ outperforms DTTQ in blocking/dropping probabilities for new calls and data calls with a bit increase of the forced-termination probability for handoff calls.