Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2006-06-15
2011-10-11
Phung, Luat (Department: 2464)
Multiplex communications
Duplex
Transmit/receive interaction control
C370S437000, C370S458000, C370S477000
Reexamination Certificate
active
08036147
ABSTRACT:
A technique for exchanging LCAS control information between a first network element and a second network element interconnected by a bi-directional optical communication line, while conveying substantially unidirectional data traffic in the form of a virtual concatenated group (VCG) binary stream transmitted in a first direction via the bi-directional optical communication line, the technique comprising: —in the first direction, transmitting the LCAS control information via the bi-directional optical communication line in the VCG binary stream, by placing the information in one or more overhead bytes conventionally specified for the VCG binary stream, —in a second (opposite) direction, transmitting the LCAS control information in an existing binary stream non-related to the above-mentioned unidirectional data traffic; the existing binary stream should pass via a communication trail connecting the first network element and the second network element but not obligatory coinciding with the above-mentioned line; the discussed information should be placed in one or more overhead bytes of the existing binary stream.
REFERENCES:
patent: 2004/0252633 (2004-12-01), Acharya et al.
patent: 2006/0067235 (2006-03-01), Acharya et al.
patent: 2006032608 (2006-03-01), None
Choy L: “Virtual Concatenation Tutorial: Enhancing Sonet/SDH Networks for Data Transport” Journal of Optical Networking, vol. 1, No. 1, Jan. 2002, pp. 18-29.
ITU-T G.7042/Y.1305 (Feb. 2004): “Link capacity adjustment scheme (LCAS) for virtual concatenated signals” International Telecommunication Union, Geneva, CH, Feb. 2004, chapter 6, plus amendments of Feb. 2005, May 18, 2005 and Aug. 2005.
ITU-T G.707/Y.1322: “Network node interface for the synchronous digital hierarchy (SDH)” International Telecommunication Union, Geneva, CH, Dec. 2003.
ITU-T G.783: “Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks” International Telecommunications Union, Geneva, CH, Mar. 2006.
ITU-T G.80+/Y.1331: “Interfaces for the Optical Transport Network (OTN)” International Telecommunications Union, Geneva, CH, Mar. 2003.
ITU-T G.798: “Characteristics of optical transport network hierarchy equipment functional blocks:” International Telecommunications Union, Geneva, CH, Dec. 2006.
Sommer Ronen
Yehuda Eitan
Browdy and Neimark PLLC
ECI Telecom Ltd.
Phung Luat
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