Method and apparatus for stable call preservation

Details Method and apparatus for stable call preservation Method and apparatus for stable call preservation

2005-07-19

2005-07-19

Trinh, Sonny (Department: 2687)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S414100, C455S442000, C455S403000, C455S453000, C379S112020, C379S157000, C370S328000, C370S338000

Reexamination Certificate

active

06920320

ABSTRACT:
A method and apparatus for preserving call-state information on a wireless communication system is provided. The method includes periodically replicating stable call call-state information between a first and second processor via a network connection. The method also includes performing a transient clear to drop transient calls in existence at the time of an outage of an active first RCS application process or processor. The method also includes forming network-based active call facilities paths to a second RCS application instance and transitioning the second RCS application instance to an active state thereby avoiding a service interruption for the stable calls previously handled by the active first RCS application instance.

REFERENCES:
patent: 6058490 (2000-05-01), Allen et al.
patent: 6148324 (2000-11-01), Ransom et al.
patent: 6522732 (2003-02-01), Pullen et al.
patent: 2001/0052006 (2001-12-01), Barker et al.
patent: 2002/0114352 (2002-08-01), Ozluturk
patent: 2004/0242259 (2004-12-01), Ozluturk et al.

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