A path optimization signalling protocol for inter-switch handoff in wireless ATM networks

In this paper, we study the connection rerouting problem due to inter-switc h handoffs. The design objective is to guarantee the bandwidth and delay of a connection during its connection lifetime. We propose to use path extens ion for each inter-switch handoff, and invoke path optimization whenever on e of the potential handoff paths exceed the delay constraint. During path e xtension, the selection of the extended path is modeled as a bandwidth-dela y-constrained path problem. The path optimization signalling protocol ensur es that ATM cell sequencing is maintained on the uplink and downlink by buf fering cells at the anchor switch and the crossover switch, respectively. ( C) 1999 Elsevier Science B.V. All rights reserved.