Method and apparatus for using SONET overheat to align multiple

Details Method and apparatus for using SONET overheat to align multiple Method and apparatus for using SONET overheat to align multiple

1994-06-14

1995-10-24

Hsu, Alpus

Multiplex communications

Wide area network

Packet switching

370 99, 370102, 3701051, 370112, H04J 306

Patent

active

054616220

ABSTRACT:
A super-rate signal is split (213) by an inverse multiplexer (200) into plural SONET STS-1 signals for transmission over separate facilities. At the receiver (500) the plural received signals are likely to have misaligned frames and payloads within the frames. In order to realign the plural signals so that they can be properly recombined to reform the original super-rate signals, the SONET A1 and A2 framing bytes together with the H1 and H2 pointer bytes are extracted (506) and used to determine (507) from where in plural buffers (508) stored frames of each received signal should be read out so that the read out signals are properly aligned. If misalignment of greater than one frame is to be corrected, plural frames of each received signal are stored and the SONET J1 byte is used in conjunction with the framing and pointer bytes to properly align the signals.

REFERENCES:
patent: 5033044 (1991-07-01), Williams et al.
patent: 5040170 (1991-08-01), Upp et al.
patent: 5142529 (1992-08-01), Parruck et al.
patent: 5257261 (1993-10-01), Parruck et al.
patent: 5315594 (1994-05-01), Noser
patent: 5331641 (1994-07-01), Parruck et al.
Rodney J. Boehm, "SONET: A Standard Optical Interface Emerges," Telephony, Apr. 4, 1988, pp. 54-57.
Ralph Ballart and Yau-Chau Ching, "SONET: Now It's the Standard Optical Network," IEEE Communications Magazine, Mar. 1989, pp. 8-15.
You-Chau Ching and Grant W. Cyboron, "Where is SONET?," IEEE, LTS, Nov. 1991, pp. 44-51.

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