A Two-Phase Inter-Switch Handoff Scheme for Wireless ATM Networks

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A Two-Phase Inter-Switch Handoff Scheme for Wireless ATM Networks
Supporting mobility in Wireless ATM networks poses a number of technical issues. An important issue is the ability to reroute ongoing virtual connections during handoff as mobile users move among base stations. We propose a two-phase inter-switch handoff scheme using permanent virtual paths reserved between adjacent Mobility Enhanced Switches (MES). The virtual paths are used in the first phase to rapidly reroute user connections. In the second phase, a distributed optimization process is initiated to optimally reroute handoff connections. The proposed handoff scheme yields small handoff latency and optimal routes while decreasing system cost and complexity. The paper also describes wireless control and ATM signaling capabilities required for supporting this scheme. Specific ATM UNI/NNI protocol extensions are presented. Using analysis we calculate and study the bandwidth requirement for the reserved virtual paths. We also study the second-phase optimization process overhead as well a...
Khaled Salah, Elias Drakopoulos
Added 04 Aug 2010
Updated 04 Aug 2010
Type Conference
Year 1998
Authors Khaled Salah, Elias Drakopoulos
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