System and method for synchronizing SGSNs and a GGSN

Details System and method for synchronizing SGSNs and a GGSN System and method for synchronizing SGSNs and a GGSN

2008-03-04

2008-03-04

Hsu, Alpus H. (Department: 2616)

Multiplex communications

Fault recovery

C370S338000, C370S349000, C370S350000, C370S401000, C709S203000, C709S224000, C709S248000

Reexamination Certificate

active

10641298

ABSTRACT:
A system and method for synchronizing SGSNs and GGSN in a mobile communication system that guarantees synchronization until a malfunction, if any, in an NTP server is cured. If malfunction occurs in the NTP server and an associated range, the NTP server is changed upon monitoring the malfunction and the changed NTP server distributes a timestamp information until the NTP server experiencing the malfunction is restored, thereby guaranteeing synchronization between the SGSNs and the GGSN.

REFERENCES:
patent: 5966378 (1999-10-01), Hamalainen
patent: 6195705 (2001-02-01), Leung
patent: 6466556 (2002-10-01), Boudreaux
patent: 6487605 (2002-11-01), Leung
patent: 6714784 (2004-03-01), Forssell et al.
patent: 2002/0091860 (2002-07-01), Kalliokulju et al.

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