System and method to improve the resiliency and performance...

Details System and method to improve the resiliency and performance... System and method to improve the resiliency and performance...

2007-03-06

2007-03-06

Meky, Moustafa M. (Department: 2157)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data routing

C370S351000

Reexamination Certificate

active

10406096

ABSTRACT:
The present invention is a system and method to improve the reliability and performance of existing enterprise IP networks which have dual-homed (or multi-homed) network architectures. In one aspect of the invention packets related to a selected category of transmission (e.g., VoIP) are duplicated at an edge router and sent over both (multiple) service providers. After traversing the service provider networks, only the first-to-arrive packets are kept and the later-arriving copies are discarded. In so doing, the result is better protection against node failures, link failures, and packet errors, and also better QoS performance under normal (fault-free) operation.

REFERENCES:
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patent: 6327275 (2001-12-01), Gardner et al.
patent: 6466574 (2002-10-01), Fujisaki et al.
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“Users Find a Smarter Way to Route” by T. Greene, NetworkWorld ((www.nwfusion.com), Jul. 22, 2002, p. 7).
“Multiprotocol Label Switching Architecture” by E. Rosen, A. Viswanathan, and R. Callon (IETF RFC 3031).
“SIP: Session Initiation Protocol” (IETF RFC 3261, Jun. 2002).

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