Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2003-04-17
2009-10-06
Pham, Brenda (Department: 2416)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S395540
Reexamination Certificate
active
07599370
ABSTRACT:
Methods and apparatus for optimizing NAT traversal in Mobile IP are disclosed. Various mechanisms may performed independently or in combination with one another. A first mechanism enables one-way keep alive messaging to the Home Agent, while a second mechanism enables two-way keep alive messaging to the Home Agent, thereby enabling an entry in a NAT translation table to be maintained. The two-way keep alive messaging requires that the Home Agent send an acknowledgement message, while the one-way keep alive messaging does not. Keep alive messaging may be performed at the Mobile Node or the Foreign Agent. A third mechanism enables a Foreign Agent to encapsulate a registration request packet with the Foreign Agent care-of address in the source IP address field rather than an egress interface of the Foreign Agent. A fourth mechanism enables a Mobile Node to force a Home Agent to perform UDP tunneling.
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Chandra Madhavi W.
Kulkarni Milind M.
Leung Kent K.
Patel Alpesh
Cisco Technology Inc.
Pham Brenda
Weaver Austin Villeneuve & Sampson LLP
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