Multiplex communications – Fault recovery – Bypass an inoperative channel
Reexamination Certificate
2005-05-03
2005-05-03
Yao, Kwang Bin (Department: 2667)
Multiplex communications
Fault recovery
Bypass an inoperative channel
C370S244000, C370S408000
Reexamination Certificate
active
06888791
ABSTRACT:
The invention provides for a method for transporting a SONET 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 m×STS-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.
REFERENCES:
patent: 5412652 (1995-05-01), Lu
patent: 5663949 (1997-09-01), Ishibashi et al.
patent: 5712846 (1998-01-01), Yoshimura
patent: 5721727 (1998-02-01), Ashi et al.
patent: 5737310 (1998-04-01), Goto
patent: 5757774 (1998-05-01), Oka
patent: 5815490 (1998-09-01), Lu
patent: 5920412 (1999-07-01), Chang
patent: 4-506290 (1992-10-01), None
patent: 5-292040 (1993-11-01), None
European Patent Office Search Report; Application No. EP 97 11 1631.
Steven H. Hersey and Mark J. Soulliere; “Architectures and Applications of Sonet in a Self-Healing Network”; ICCC'91 International Conference on Communications, vol. 3 of 3; pp. 1418-1424.
J. Vernon Drake; “A Review of the Four Major Sonet/SDH Rings”; ICC '93 Geneva, IEEE International Conference on Communications '93, May 23, 1993, Technical Program, Conference Record, vol. 2/3; pp. 878-884.
Barbara Engel Smith and Clifford Yackle; “SONET Bidirectional Ring Capacity Analysis: A Pragmatic View”; IEEE, May 1, 1994; pp. 489-493.
William Kremer; “SONET Rings and Video: A Perfect Fit”; Telephony/Jan. 23, 1995; pp. 30, 34, 36.
Tsong-Ho Wu, Dennis T. Kong, and Richard C. Lau; “An Economic Feasibility Study for a Broadband Virtual Path SONET/ATM Self-healing Ring”; IEEE Journal on Selected Areas in Communications 10 (1992) Dec., No. 9, New York; pp. 1459-1472.
Tsong-Ho Wu; “Feasibility Study of a High-Speed SONET Self-Healing Ring Architecture in Future Interoffice Networks”; IEEE Communications Magazine 28, (1990) Nov., No. 11, New York; pp. 33-51.
Joseph Sosnosky and Haim Kobrinski; “A Current Bellcore View of Sonet ATM VP Rings”; IEEE; Nov. 14, 1995; pp. 39-44.
Hideo Tatsuno and Nobuyuki Tokura; ATM; “Hitless Path Protection Switching Techniques for ATM Networks”; The Transactions of the Institute of Electronics, Information and Communication Engineers; B-I vol. J 76-B-I; No. 6; pp. 421-430, 455; Jun., 25, 1993.
Yoshio Kajiyama, Nobuyuki Tokura and Katsuaki Kikuchi; “ATM Self-Healing Ring”; Abstract; pp. 639-643.
Allen Brent E.
Ellis Donald Russell
Martin David Wright
McEachern Patrick M.
Sokolowski Edward Ryszard
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Nortel Networks Limited
Yao Kwang Bin
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