0818940-A2 is referenced by 28 patents and cites 7 patents.

The invention provides for a method for transporting a SONET/SDH formatted asynchronous transfer mode (ATM) signal and/or a synchronous transfer mode (STM) signal on a line switched ring over a unidirectional path. The SONET formatted ATM signal comprises cells mapped into a STS-Mc or mxSTS-1s while the STM signal comprises STS-1s/VTs mapped STS-W. A unidirectional line switched ring is provided for transporting the STM STS-W using a unidirectional path switched protection protocol and the ATM STS-Mc using a unidirectional line switched protection protocol. A ring node comprises input and output ring interfaces, an STS management block, an ATM cell management block, and a non-ATM payload management block. The STS management block routes the traffic to the ATM cell management block and to the non-ATM payload management block, according to the traffic type.; The STS management block also provides the UPSR protection for the STS-1s and ULSR protection for the STS-Mc. The ATM cell management block maps the add ATM cells received from the ATM ports into the STS-Mc signal, and delineates the cells from the STS-Mc to present them to the ATM ports. The non-ATM payload management block routes STM VTs or STS-1s to/from the non-ATM ports.

Title
Self-healing line switched ring for atm traffic
Application Number
EP19970111631 19970709
Publication Number
0818940 (A2)
Application Date
July 9, 1997
Publication Date
January 14, 1998
Inventor
Mceachern Patrick M
CA
Sokolowski Edward Ryszard
CA
Martin David Wright
CA
Allen Brent E
CA
Ellis Donald Russell
CA
Assignee
Northern Telecom
CA
IPC
H04L 12/437
H04Q 11/04
H04Q 11/04
H04L 12/437
H04J 03/08
H04J 03/00
H04Q 11/04
H04L 12/437
H04J 03/08
H04J 03/00
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