Lucent Technologies Inc.

At+t Corp.

Lucent Technologies, Inc. & Pmc-sierra, Inc.

Floyd Craig Wolverton

Stephen R Peck

Winston K Mok

James R Bortolini

Scott E Farleigh

John S Helton

Jeff Fedders

Merico Edward Argentati

David John Hudak

Fernand Da Fonseca

The system for broadband data payload conversion functions to efficiently convert broadband data between two sets of data formats. In particular, this software system converts between AUG/AU3/VC3 clear channel payloads and AU4/VC4/TU3/VC3 clear channel payloads in an efficient manner, which also complies with the industry standard data formatting requirements. The present system implements an efficient data format conversion process that uses existing circuitry and can effect the data format conversion with only a few bytes of delay instead of an entire frame of delay as is typically found in existing systems. This is accomplished by manipulating the format conversion to simplify the format conversion process.

System for efficient broadband data payload conversion

Control data is communicated utilizing a multi-frame format that consists of individual frames each having a number of rows and columns. As each row is received from a transmitting unit, the data and position of the row within a frame is verified by use of a checksum and is immediately utilized by the receiving unit. This reduces the amount of storage that must be provided by the receiving unit for the reception of control information to that of a single row. In addition to verifying the row identification, the identity of each frame within the multi-frame is also verified before an individual row is utilized. In a first embodiment, the operation of generating the checksum is seeded with the current row number. In a second embodiment, the operation of generating the checksum is seeded with the result of an Exclusive OR operation of the current row number and frame number.

Control data link format utilizing CRC error detection

An apparatus that provides two different sources for generating the bytes to be inserted into frames of data being communicated through a switching unit. This apparatus allows for the insertion of variable, programmable data patterns in multiple frames. Under program control of a controller, the first source can selectively write data into designated time slots within designated rows and designated frames of multiple frames. Different data can be inserted into different rows of the same column of each frame. In addition, different data for different frames can be inserted into different rows of the same column. Also, the same data can be inserted into designated a row and column of a designated frame. The second source can write data into every row of a designated column of every frame.

Apparatus for insertion of overhead protocol data into a switched data

Growing community of inventors

Westminster, CO, United States of America

Floyd Craig Wolverton