| US 7,573,871 B2 | ||
| Apparatus for processing OTN frames utilizing an efficient forward error correction | ||
| Danny Lahav, Kfar Saba (Israel); Haim Moshe, Petach Tikva (Israel); Amir Dabby, Sitriya (Israel); and Liviu Altarovici, Tel Aviv (Israel) | ||
| Assigned to TranSwitch Israel, Ltd., Herzliya (Israel) | ||
| Appl. No. 10/499,435 PCT Filed Dec. 10, 2002, PCT No. PCT/US02/39338 § 371(c)(1), (2), (4) Date Jun. 21, 2004, PCT Pub. No. WO03/063516, PCT Pub. Date Jul. 31, 2003. |
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| Prior Publication US 2005/0068995 A1, Mar. 31, 2005 | ||
| Int. Cl. H04L 12/28 (2006.01) | ||
| U.S. Cl. 370—389 | 8 Claims |
| 1. An apparatus for optical transport networks (OTNs) that enables efficient OTN frames processing and improved forward error
correction (FEC), the apparatus having a line interface for interfacing with an external network and a system interface for
interfacing with a client, the apparatus comprising:
a line receive unit (LRU) connected to the line interface and receiving through the line interface network OTN frames, said
LRU including a Bose-Chaudhuri-Hocquenghem (BCH) decoder for performing FEC on said OTN frames using solely a BCH code, said
LRU processes forward error corrected OTN frames into LRU processed network OTN frames; and
a system receive unit (SRU) connected to said LRU and the system interface, said SRU processes said LRU processed network
OTN frames to generate SRU processed OTN frames; and further transmits said SRU processed OTN frames through the system interface
to the client; and
a line transmit unit (LTU) including a BCH encoder, said LTU connected through a multiplexer to said LRU and said STU, said
LTU processes network and client OTN frames received respectively from said LRU and said STU into LTU BCH coded OTN frames
that are being output to the network through the line interface, wherein said BCH encoder produces redundancy bits by processing
at least one BCH code-word, wherein said redundancy bits are placed in a FEC area of an OTN frame.
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