H.323 mobility architecture for terminal, user and service mobility

Claim 1

An H.323-based mobility system with protocol for real-time mobile multimedia communications and conferencing over packet-based networks wherein a plurality of H.323 mobility gatekeepers provide H.323 mobility services availability in various Location Areas or Cells or Zones comprising: at least one H.323 Mobile Terminal/NodelEntity, arranged to broadcast or multicast or unicast an H.323 call, that, upon detecting at least one H.323 mobility gatekeeper of the plurality of H.323 mobility gatekeepers that support H.323 mobility services in a first Location Area or Cell or Zone of the Mobile Terminal/NodelEntity, registers with a Home Location Database in the first Location Area or Cell or Zone via a first Mobile Switching Center, moves from the first Location Area or Cell or Zone to a second Location Area or Cell or Zone, registers locally, and sets up a mobile H.323-based call; at least one Base Station, arranged to receive/send location information and H.323 calls in the first/second Location Area or Cell or Zone, for receiving/sending the location information for the Mobile Terminal/Node/Entity from/to a first/second Mobile Switching Center, and for receiving/sending calls from/to the first/second Mobile Switching Center for forwarding to a callee Mobile/Nonmobile Terminal/Node/Entity; the Home Location Database, arranged to receive and store Mobile Terminal/NodelEntity location information and send the location information to a first Visitor Location Database via a first Mobile Switching Center, and upon the H.323 Mobile Terminal/Node/Entity moving from the first Location Area or Cell or Zone to the second Location Area or Cell or Zone, for receiving update location information and sending the update location information to a second Visitor Location Database via a second Mobile Switching Center for the second Location Area or Cell or Zone; the first Visitor Location Database, arranged to receive the location information via the first Mobile Switching Center, for storing and updating the location information; the first Mobile Switching Center, arranged to receive and acknowledge location information and, where the callee Mobile/Nonmobile Terminal/Node/Entity is in the first Location Area or Cell or Zone, for setting up a call from the Mobile Terminal/Node/Entity to the callee Mobile/Nonmobile Terminal/Node/Entity via a callee Base Station in the first Location Area or Cell or Zone; the second Visitor Location Database, arranged to receive the location information via the second Mobile Switching Center, for storing and updating the location information; and the second Mobile Switching Center, arranged to receive and acknowledge location information and, where a callee Mobile/Nonmobile Terminal/Node/Entity is in the second Location Area or Cell or Zone, for setting up a call from the Mobile Terminal/Node/Entity to the callee Mobile/Nonmobile Terminal/Node/Entity via a callee Base Station in the second Location Area or Cell or Zone.