Method for redundancy backup of signaling link in IP network

Details Method for redundancy backup of signaling link in IP network Method for redundancy backup of signaling link in IP network

2008-01-01

2008-01-01

Ho, Duc (Department: 2616)

Multiplex communications

Fault recovery

Bypass an inoperative channel

C370S466000, C370S401000, C370S385000

Reexamination Certificate

active

07315512

ABSTRACT:
The invention discloses a method for implementing signaling link redundancy in IP networks. Two ASPs are created for the same AS in the host at the IP network side, and all user adaptation protocols share ASPSM and ASPTM messages so that the states of the two ASPs can become active and inactive respectively, thus to implement two signaling links for serving the same traffic. When switch is initiated, SCTP association can be closed by using “graceful close”, and the SCTP itself will make sure to send out all the data remaining in its buffer and its higher-layer applications will also send subsequent data in order after learning the remaining data are all sent out, thus sequential delivery for the data can be guaranteed. This method can avoid data loss and disorder, and the speed for switch can be ensured because the backup link will be notified immediately after the data on the primary link are sent out.

REFERENCES:
patent: 6839344 (2005-01-01), Couillaud et al.
patent: 7245874 (2007-07-01), Rest et al.

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