Multiplex communications – Fault recovery – Bypass an inoperative switch or inoperative element of a...
Reexamination Certificate
2005-09-06
2005-09-06
Pezzlo, John (Department: 2662)
Multiplex communications
Fault recovery
Bypass an inoperative switch or inoperative element of a...
C370S242000, C370S395100
Reexamination Certificate
active
06940810
ABSTRACT:
A ring network is provided. The ring network includes a number of network elements, each including first and second switch fabrics. At least two uni-directional busses are coupled between the first and second switch fabrics. A number of ring segments are coupled between adjacent network elements to form first and second routes for transporting cells using virtual connections wherein, for each virtual connection, one route is the working route and the other route is the protection route. The first and second switch fabrics of each network element are associated with one of the first and second routes. The first and second switch fabrics of each network element separately track the status of a number of virtual connections such that when an error is detected by one of the switch fabrics associated with a working route for a virtual connection, the switch fabric detecting the error communicates the change in state for the virtual connection to the other switch fabric over one of the first and second uni-directional busses to be used in a switching decision.
REFERENCES:
patent: 4527270 (1985-07-01), Sweeton
patent: 4596982 (1986-06-01), Bahr et al.
patent: 4677611 (1987-06-01), Yanosy, Jr. et al.
patent: 4704713 (1987-11-01), Haller et al.
patent: 4763315 (1988-08-01), Nakayashiki et al.
patent: 4835763 (1989-05-01), Lau
patent: 5070498 (1991-12-01), Kakuma et al.
patent: 5280475 (1994-01-01), Yanagi et al.
patent: 5390164 (1995-02-01), Kremer
patent: 5394389 (1995-02-01), Kremer
patent: 5515363 (1996-05-01), Ben-Nun et al.
patent: 5537411 (1996-07-01), Plas
patent: 5557611 (1996-09-01), Cappellari et al.
patent: 5583849 (1996-12-01), Ziemann et al.
patent: 5612959 (1997-03-01), Takase et al.
patent: 5636215 (1997-06-01), Kubo et al.
patent: 5673262 (1997-09-01), Shimizu
patent: 5684800 (1997-11-01), Dobbins et al.
patent: 5712968 (1998-01-01), Nakayama et al.
patent: 5754528 (1998-05-01), Uchida
patent: 5760934 (1998-06-01), Sutter et al.
patent: 5774662 (1998-06-01), Sakagawa
patent: 5805820 (1998-09-01), Bellovin et al.
patent: 5838663 (1998-11-01), Elwalid et al.
patent: 5852606 (1998-12-01), Prince et al.
patent: 5892912 (1999-04-01), Suzuki et al.
patent: 5912891 (1999-06-01), Kanai
patent: 5926102 (1999-07-01), Chun et al.
patent: 5949755 (1999-09-01), Uphadya et al.
patent: 5974027 (1999-10-01), Chapman
patent: 5978356 (1999-11-01), Elwalid et al.
patent: 6011780 (2000-01-01), Vaman et al.
patent: 6072610 (2000-06-01), Kuroyanagi et al.
patent: 6219336 (2001-04-01), Takahashi et al.
patent: 6233221 (2001-05-01), Lowe et al.
patent: RE37401 (2001-10-01), Yamashita et al.
patent: 6477288 (2002-11-01), Sato
patent: 6579018 (2003-06-01), Li et al.
patent: 6657952 (2003-12-01), Shiragaki et al.
patent: 6674755 (2004-01-01), Potter et al.
patent: 6771849 (2004-08-01), Fang et al.
patent: 6775228 (2004-08-01), Solana De Quesada
patent: 0818940 (1997-07-01), None
Fritz, J., “Bulletproofing ATM: Part I”, Byte, 22, pp. 59-60, Jun. 1997.
May, K. P., et al., “A Fast Restoration System for ATM-Ring-Based LANs”, IEEE Communications Magazine, 33, pp. 90-98, Sep. 1995.
Takase, A., et al., “ATM Transport Node For Flexible and Robust Access Networks”, Proceedings of the Global Telecommunications Conference (GLOBECOM), vol. 3, pp. 1481-1487, Nov.-Dec. 1993.
“ATM Virtual Path Functionality in SONET Rings—Generic Criteria”, Bellcore, GR-2837-CORE, Issue 3, Oct. 1996.
“ATM Service Access Multiplexer (SAM) Generic Requirements”, Bellcore, GR-2842-CORE, Issue 2, Nov. 1996.
ADC Telecommunications Inc.
Elallam Ahmed
Fogg and Associates LLC
Lundberg Scott V.
Pezzlo John
LandOfFree
Protection switching of virtual connections at the data link... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Protection switching of virtual connections at the data link..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protection switching of virtual connections at the data link... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3394462