Communication between users located behind a NAT device

Details Communication between users located behind a NAT device Communication between users located behind a NAT device

2004-07-14

2009-06-02

Tsang, Fan (Department: 2614)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S230000, C370S389000, C709S220000

Reexamination Certificate

active

07542475

ABSTRACT:
A method is provided for use in communication between a first and second telephony users wherein both users are located behind a NAT/FW server. The method comprises determining that both these telephony users are located behind one common NAT/FW server in order to allow establishing a direct communication session between the two of them, thereby eliminating the need of being connected to a remote agent for the duration of the whole session.

REFERENCES:
patent: 6567405 (2003-05-01), Borella et al.
patent: 7006436 (2006-02-01), Chu et al.
patent: 7313145 (2007-12-01), Bradd et al.
patent: 7327721 (2008-02-01), Balasaygun et al.
patent: 7330463 (2008-02-01), Bradd et al.
patent: 2002/0085561 (2002-07-01), Choi et al.
patent: 2002/0141384 (2002-10-01), Liu et al.
patent: WO 02/073330 (2002-09-01), None

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