Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-10-16
2007-10-16
Nguyen, Hanh (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S352000, C370S389000, C726S012000, C726S013000, C726S014000
Reexamination Certificate
active
10298103
ABSTRACT:
An interface for a private IP network interfaces flows of packets between gateway controllers and external media gateways. It has a network address translator and an IPsec device for maintaining secure paths to the external devices. A path identifier records which of the packet flows corresponds to which path. It is incorporated in the packet header, and means that the same interface can be used to couple many different external gateways, and interface them with many of the gateway controllers. Widespread deployment of such interfaces in anonymisers to achieve hiding of device addresses and network topology, as well as the reduction in use of expensive registered addresses is facilitated. By sending the path identifier in the packet, the IPsec device and the address translator can be loosely coupled devices, so standard readily available devices can be used.
REFERENCES:
patent: 6507908 (2003-01-01), Caronni
patent: 6674758 (2004-01-01), Watson
patent: 7061899 (2006-06-01), Walker et al.
patent: 7099319 (2006-08-01), Boden et al.
Barnes & Thornburg LLP
Nguyen Hanh
Nortel Networks Limited
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