Gateway-based system and method for tandem free operation

Details Gateway-based system and method for tandem free operation Gateway-based system and method for tandem free operation

2003-07-10

2011-11-15

Sheikh, Ayaz (Department: 2476)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C455S436000

Reexamination Certificate

active

08059663

ABSTRACT:
Mobile switching centers (MSCs) in serving systems are interconnected by gateways for tandem free operation. The serving systems route calls involving two mobile stations that use the same compressed digital format through the gateways. The gateways carry the media exchanged during the call in the compressed digital format in order to avoid tandem transcoding. When a serving system hands off a mobile station involved in a tandem free call, the call pathway is extended through the gateways so that the call remains tandem free.

REFERENCES:
patent: 5608779 (1997-03-01), Lev et al.
patent: 5768308 (1998-06-01), Pon et al.
patent: 5793810 (1998-08-01), Han et al.
patent: 5956673 (1999-09-01), Weaver et al.
patent: 5987327 (1999-11-01), Lev et al.
patent: 5995923 (1999-11-01), Mermelstein et al.
patent: 6070089 (2000-05-01), Brophy et al.
patent: 6078809 (2000-06-01), Proctor
patent: 6091969 (2000-07-01), Brophy et al.
patent: 6138022 (2000-10-01), Strawczynski et al.
patent: 6172974 (2001-01-01), Tseng et al.
patent: 6185424 (2001-02-01), Pon et al.
patent: 6215996 (2001-04-01), Fujita et al.
patent: 6256612 (2001-07-01), Vo et al.
patent: 6272358 (2001-08-01), Brent et al.
patent: 6292662 (2001-09-01), Ziv et al.
patent: 6351495 (2002-02-01), Tarraf
patent: 6490451 (2002-12-01), Denman et al.
patent: 6574469 (2003-06-01), Xiang et al.
patent: 6611694 (2003-08-01), Oltedal et al.
patent: 6766291 (2004-07-01), Chu et al.
patent: 6785339 (2004-08-01), Tahernezhaadi et al.
patent: 6888803 (2005-05-01), Gentry et al.
patent: 6920150 (2005-07-01), Pauls et al.
patent: 6985866 (2006-01-01), Nakagaki
patent: 7023819 (2006-04-01), Falsafi
patent: 7120447 (2006-10-01), Chheda et al.
patent: 7174156 (2007-02-01), Mangal
patent: 7203226 (2007-04-01), Rabipour et al.
patent: 7240000 (2007-07-01), Harada
patent: 7406319 (2008-07-01), Kostic et al.
patent: 7426180 (2008-09-01), Xu
patent: 2002/0075850 (2002-06-01), Cruz et al.
patent: 2002/0191693 (2002-12-01), Nakagaki
patent: 2003/0012221 (2003-01-01), El-Maleh et al.
patent: 2003/0125960 (2003-07-01), Chu et al.
patent: 2004/0009787 (2004-01-01), Oh et al.
patent: 2005/0018769 (2005-01-01), Hellwig et al.
patent: 2007/0053348 (2007-03-01), Koistinen
patent: WO 96/19907 (1996-06-01), None
patent: WO/00/31951 (2000-06-01), None
patent: WO 2004/008652 (2004-01-01), None
patent: WO 2004/008679 (2004-01-01), None
Written Opinion from International Application No. PCT/US03/21308, dated May 20, 2004.
International Search Report prepared for PCT Application No. PCT/US03/21196, dated Oct. 2, 2003.
International Search Report prepared for PCT Application No. PCT/US03/21308, dated Oct. 3, 2003.
Graham Rousell, “The Implications of ETSI Tandem Free Operation(TFO)in GSM Networks,” Mobile Europe, Sep. 1999.
3rdGeneration Partnership Project 2, “Tandem Free Operation(Stage 1),” Dec. 13, 1999.
3rdGeneration Partneiship Project 2, “CDMA Tandem Free Operation(Post SDO Ballot,Pre SDO Publication Version),” Aug. 5, 2002.
Office Action, mailed Sep. 1, 2010, in U.S. Appl. No. 11/951,630.

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