System and method for inter-domain mobility management
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Abstract
The present invention relates to a method and apparatus for inter-domain mobility management for a telephony network. The present invention also relates generally to the H.323 standard for transmitting audio and video data streams, and more particularly to extending the H.323 standard to support mobility in a multimedia communication system with services over packet-based networks.
66 Citations
84 Claims
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1-62. -62. (canceled)
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63. A method for use at a mobile node for real-time mobile multimedia communications and conferencing over an H.323-based packet network, said Mobile Node having an associated Home Gatekeeper in a first domain and said network comprising a plurality of Visiting Gatekeepers that support H.323 mobility services in a second domain, said method comprising the steps of:
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if a Mobility Gatekeeper Advertisement is received, obtaining via said Mobility Gatekeeper Advertisement notification of the availability of an H.323 mobility service;
if no Mobility Gatekeeper Advertisement is received, sending a message to said Home Gatekeeper, said message initiating notification from said Home Gatekeeper to said Visiting Gatekeeper of the desirability for said H.323 mobility service;
registering said Mobile Node with said Visiting Gatekeeper; and
receiving an H.323 mobility service communication from said Visiting Gatekeeper. - View Dependent Claims (64, 65, 66, 67, 68, 69)
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70. A computer readable medium at a Mobile Node, said computer readable medium comprising computer program instructions defining computer-executable steps for real-time mobile multimedia communications and conferencing over an H.323-based packet network, said Mobile Node having an associated Home Gatekeeper in a first domain and said network comprising a plurality of Visiting Gatekeepers that support H.323 mobility services in a second domain, said compute-executable steps comprising the steps of:
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if a Mobility Gatekeeper Advertisement is received, obtaining via said Mobility Gatekeeper Advertisement notification of the availability of a H.323 mobility service;
if no Mobility Gatekeeper Advertisement is received, sending a message to said Home Gatekeeper, said message initiating notification from said Home Gatekeeper to said Visiting Gatekeeper of the desirability for said H.323 mobility service;
registering said Mobile Node with said Visiting Gatekeeper; and
receiving said H.323 mobility service communication from said Visiting Gatekeeper. - View Dependent Claims (71, 72, 73, 74, 75, 76)
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77. A method for use at Visiting Gateway in an H.323-based packet network for real-time mobile multimedia communications and conferencing, said network comprising a plurality of Visiting Gatekeepers that support H.323 mobility services in a corresponding plurality of zones in a second domain, said method comprising one of the steps of:
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a) notifying a Mobile Node of the availability of at least a first H.323 mobility service via said Mobility Gatekeeper Advertisement; and
b) receiving notification from a Home Gatekeeper in a first domain associated with said Mobile Node of the need at said Mobile Node for said at least a first H.323 mobility service; and
the steps of;
registering said Mobile Node with said Visiting Gatekeeper; and
transmitting an H.323 mobility service communication to said Mobile Node. - View Dependent Claims (78, 79, 80, 81, 82, 83, 84)
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Specification