A time-threshold based multi-guard bandwidth allocation scheme for cellular networks

In this paper, a time-threshold based multi-guard bandwidth allocation scheme for voice calls is presented. The main idea of the new scheme is based on monitoring the elapsed real time of handoff calls and according to a time threshold (t_e), a handoff call is either slightly-prioritized or fully-prioritised. A slightly-prioritized handoff call has higher priority than a new call and lower priority than a fully-prioritized handoff call. Also in this paper, the performances of different bandwidth allocation schemes are measured using a crucial general performance metric Z. Z, which is a performance/cost ratio, is a function of the new call blocking probability, handoff call dropping probability and system utilization all together. The results indicate that our scheme outperforms other traditional schemes in terms of performance/cost ratio, and maintains its superiority under different network circumstances