Communication system and encoding method having low overhead

摘要

In a method for coding a packet of information words into a frame for transmission, blocks of input data are received, the input data including control words and the packet of information words, the packet having (a) a start preceded by ones of the control words and (b) an ending followed by others of the control words, the blocks being smaller than the packet. When the block consists exclusively of information words, a one bit block header having a first sense is appended to the block to form the frame. When the block does not consist exclusively of information words: the block is condensed to accommodate a TYPE word, the TYPE word is inserted into the block, and a one bit block header having a second sense, opposite to the first sense, is appended to the block to form the frame.

主权项

1. A method for coding a packet of information words into a frame for transmission, the method comprising:
receiving blocks of input data, the input data including control words and the packet of information words, the packet having (a) a start preceded by ones of the control words and (b) an ending followed by others of the control words, the blocks being smaller than the packet; determining whether a block consists exclusively of information words and:
when the block consists exclusively of information words, appending to the block a one bit block header having a first sense to form the frame,when the block does not consist exclusively of information words:
condensing the block to accommodate a TYPE word, generating the TYPE word to have a value that indicates one of the following structural properties of the block:
(a) a position of the start of the packet in the block,(b) a position of the end of the packet in the block, and(c) the block being composed exclusively of control words,inserting the TYPE word into the block,appending to the block a one bit block header having a second sense, opposite to the first sense, to form the frame, andperforming forward error correction (FEC) on multiple frames to generate FEC data.