Patent ID: 7573871
Filing Date: 2009-08-11
Classification: H04J,H04L

Abstract:
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.