A dynamic wired-resource reservation scheme with a connection rerouting method on ATM-based PCN

We propose a connection rerouting method for fast inter-switch handoffs, and a dynamic resource reservation scheme based on the connection rerouting method, for the ATM-based personal communications network. The rerouting method reduces the delay in the connection rerouting by reserving VPI/VCIs for possible inter-switch handoff calls in advance. This paper categorizes the traffic carried in wired/wireless networks into two classes (Class I: real-time and delay-sensitive traffic, Class II: non-real-time and delay-tolerable traffic). The proposed resource reservation scheme statistically reserves the wired resources in separate ways according to the classes of the possible inter-switch handoff calls. The simulation results show that our scheme reduces the dropping rate of inter-switch handoff calls below 2-3×10^-1 times the blocking rate of new calls during heavy load and also keeps the probability of dropping of inter-switch handoff calls with Class II traffic lower than that with Class I traffic. The results also show that our scheme can flexibly-cope better with the time-variant environment than the fixed reservation scheme