Method and apparatus for processing internet protocol...

Details Method and apparatus for processing internet protocol... Method and apparatus for processing internet protocol...

2006-01-10

2006-01-10

Chin, Wellington (Department: 2664)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S338000, C370S401000, C370S356000, C709S228000, C709S229000, C709S245000, C709S221000

Reexamination Certificate

active

06985479

ABSTRACT:
Method and apparatus for data packet communications in a communication system. Packets are received at a gateway having an Internet Protocol (IP) destination address and Network Access Identifier (NAI). The gateway maps the received NAI to a local network, such as supported by a Network Address Translator (NAT). The gateway then converts the destination address to a NAT address of the local network. The gateway also adds a port number that allows the NAT to identify the target recipient. The mapping within the gateway is created and maintained as Mobile Stations send registration requests upon arrival within a local network. In one embodiment, the registration request is a Session Initiation Protocol (SIP) registration.

REFERENCES:
patent: 2002/0152325 (2002-10-01), Elgebaly et al.
patent: 2002/0154627 (2002-10-01), Abrol et al.
patent: 2003/0007486 (2003-01-01), March et al.
patent: 2003/0095540 (2003-05-01), Mulligan et al.

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