The present invention provides an H.323-based mobility system for real-time
mobile multimedia communications and conferencing over packet-based
networks. The H.323-based mobility system includes at least one H.323
Mobile Entity, arranged to send an H.323 call, that, upon detecting at
least one H.323 mobility gatekeeper that supports H.323 mobility services
in a Location Area, communicates with a Home Location Database, moves from
the first Location Area to a second Location Area, registers locally, and
sets up a mobile H.323-based call; at least one Base Station, for
receiving/sending the location information from/to a Mobile Switching
Center, and for receiving/sending calls from/to the Mobile Switching
Center for forwarding to a callee Mobile/Nonmobile Entity; the Home
Location Database, arranged to receive and store Mobile Entity location
information and send it to a first Visitor Location Database, and upon the
H.323 Mobile Entity moving from one Location Area to another Location
Area, for receiving update location information and sending it to a second
Visitor Location Database; the first Visitor Location Database, for
storing and updating the location information; the first Mobile Switching
Center, for, where the callee Mobile/Nonmobile Entity is in the first
Location Area, setting up a call from the Mobile Entity to the callee
Mobile/Nonmobile Entity; the second Visitor Location Database, for storing
and updating the location information; and the second Mobile Switching
Center, for, where a callee Mobile/Nonmobile Entity is in the second
Location Area, setting up a call from the Mobile Entity to the callee
Mobile/Nonmobile Entity.
