Agilent Technologies, Inc.

Other

Richard W Dugan

Richard Clayton Walker

Bharadwaj Amrutur

Optical transceiver with pluggable optical module. An electro-optical transceiver, preferably in a standard form factor such as XENPAK, XPAK, or X2, is adapted to receive a pluggable optical module, preferably complying with the XFP standard. The transceiver adapts signals from the pluggable optical module to the transceiver interface.

Optical transceiver module

Blocks of input data are received. The input data comprises packets of information words. The packets are preceded and followed by control words. A master transition is appended to the beginning of each block to form a respective frame for transmission. The master transition has a sense that depends on whether the block contains any control words. Additionally, for each block that contains one or more control words, a TYPE word indicating a structural property of the block is generated, the block is condensed to accommodate the TYPE word, and the TYPE word is inserted into the block. The coding method provides a very low overhead (3.125%) when implemented as a 64b/66b code.

Coding method for coding packetized serial data with low overhead

Blocks of input data that include control words and a packet of information words are received. The packet has a start preceded by ones of the control words and an end followed by others of the control words. The blocks are smaller than the packet. A determination of whether the block consists exclusively of information words is made. When the block consists exclusively of information words, a master transition having a first sense is appended to the block to form a frame. When the block does not consist exclusively of information words, the block is condensed to accommodate a TYPE word, the TYPE word is generated and inserted into the block and a master transition is appended to the block to form the frame. The TYPE word has a value that indicates one of the following structural properties of the block: (a) the position of the start of the packet in the block, (b) the position of the end of the packet in the block, and (c) the block being composed exclusively of control words. The master transition appended to the block when the block does not consist exclusively of information words has a second sense, opposite to the first sense.

Coding method and coder for coding packetized serial data with low overhead

The frame of data that is decoded is one of a set of frames that represent a packet of information words, and that additionally represent coded control words preceding and following the packet. The frames each include a master transition and a payload field. The payload field either is composed exclusively of ones of the information words, or includes a TYPE word that defines the structure of the payload field. The master transition is in a first state when the payload field is composed exclusively of ones of the information words, and is otherwise in a second state. In the method, a determination is made of whether the master transition is in the first state. When the master transition is in the first state, the payload field is adopted as a block of received data. When the master transition is not in the first state, the TYPE word is extracted from the payload field, the payload field is expanded in response to the TYPE word, and the payload field, after expansion, is adopted as a block of received data.

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San Jose, CA, United States of America

Richard W Dugan