Nortel Networks Corporation

Rambabu Tummala

Haseeb Akhtar

Emad A Qaddoura

Liem Q Le

Donald L Wurch

David James Mitton

Monling Liao

In an IP-based mobile communications system, the Mobile Node changes its point of attachment to the network while maintaining network connectivity. The present invention improves the attachment of the Mobile Node to the IP mobile communications system by allowing a AAA Broker Server to maintain client information necessary to establish the a secure Mobile Node connection to the home network.

AAA broker specification and protocol

Computer program products, related methods, and a protocol for interworking services between a public telephone network, including an Intelligent Network, and an internet protocol network are provided. A public telephone network transports a TCAP message in an SS7 protocol format, and an internet protocol network, or IP network, transports an encapsulated TCAP message in an IP protocol format. A STIPP (Simple TCAP-IP Interworking Protocol) protocol, represented as a computer data signal including a plurality of bits, is used for exchanging TCAP messages between IP network entities. The computer data signal comprises an internet protocol portion, a transport portion, and a STIP (Simple TCAP Interworking Part) portion. The STIP portion includes a STIP header for encapsulating the TCAP message therein for transmission between IP network entities. Various computer data signal embodiments are provided. A computer program product for an interworking gateway exchanging TCAP messages with a public telephone network and encapsulated TCAP messages with an internet protocol network is provided. Further, a computer program product for an IP network entity exchanging encapsulated TCAP messages with an internet protocol network is provided. Message encapsulation, extraction, and decapsulation are provided. Various embodiments and functions are included for each computer program product. A method for exchanging TCAP messages between a public telephone network and an internet protocol network for services interworking is included. Further, a method for exchanging encapsulated TCAP messages with an internet protocol network, such that TCAP messages can ultimately be exchanged with a public telephone network through an internet protocol network is provided.

Computer program products, methods, and protocol for interworking services between a public telephone network, intelligent network, and internet protocol network

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Plano, TX, United States of America

Rambabu Tummala