Abstract: A virtual circuit rerouting method and apparatus provide for rerouting virtual circuits in an ATM-based network having mobile devices. Included are protocols for ensuring hand-off of the mobile device from a first basestation to a second basestation, identification of a rebuild switch and connection of the mobile device to the rebuild switch prior to data being transferred from the mobile device to the network. The rerouting method minimizes loss of data by ensuring that the mobile device is incapable of transferring data to the network before the virtual circuit rerouting procedure is completed. The method includes an aggregate registration request, or 3-phase handshake, and a "Connect Confirm" command. The virtual circuit rerouting protocols are further adapted to operate on most common virtual circuit rerouting strategies, including rebuild, partial rebuild and extension with loop removal.

Abstract: A method for supporting end to end VC oriented service between mobile hosts. Included are protocols designed for a micro-cellular wireless environment in which mobile hosts make frequent transitions between cells. A VC rerouting procedure minimizes the effect of frequent hand-offs by extending routes and triggering a route rebuild only when performance as seen by an application degrades below a certain level. VC establishment and rerouting protocols assume the existence of separate signaling protocols for the wired and the wireless network, respectively. This minimizes the changes required to the signaling infrastructure used in the wired network while allowing the signaling in the wireless network to be customized for the unique requirements of that particular environment.