Loop cancellation and path optimization of path extension handover in mobile ATM services

There has been increasing interest in providing broadband services. Wireless ATM will be used to support broadband services in future generation mobile communications. We have studied how to treat the loop cancellation and path optimization of the path extension handover scheme. In this paper, we present path optimization algorithms as a means to effect this treatment; they are polygonal loop cancellation and trigonal loop cancellation. We express the location of the mobile terminal (MT) by direction angles, which we convert into direction vectors. Using these direction vectors, we can ascertain the optimal path of the MT. We compare the proposed scheme with the anchor rerouting scheme in average handover delay, communication disruption delay, buffer requirements, and the total time used for exchanging signalling messages.