公开(公告)号：CA2082077A1

公开(公告)日：1993-08-21

申请号：CA2082077

申请日：1992-11-04

Applicant: IBM

Inventor： BARTOW NEIL G ,  BROWN PAUL J ,  CAPOWSKI ROBERT S ,  FASANO LOUIS T ,  GREGG THOMAS A ,  SALYER GREGORY ,  SUGRUE PATRICK J ,  WESTCOTT DOUGLAS W ,  ZEYAK VINCENT P JR

IPC: H04J3/06 ,  H04L25/02 ,  H04L69/40

Abstract: A system and method for asynchronously transmitting data blocks, in parallel, across multiple fibers in a serial manner. Frame groups are provided as a mechanism to transmit associated data serially on each fiber and tie the data being transmitted together. The frame groups do not have sequence numbers, therefore, the receiver determines which frames are part of a frame group by the arrival times of the individual frames. In one embodiment, the transceivers for each member of the parallel bus asynchronously achieve synchronism at each end of the fiber. Thus the need for a common clock is eliminated. The receivers on each side of the bus determine the relative skew for each conductor by performing skew measurements on a calibration message generated by the transmitters on the other side of the bus. When the skew on all conductors, viewed from both sides of the bus, has been determined, the skew values are exchanged across the bus, thus enabling the transmitters to set proper frame spacing.

公开(公告)号：BR9300358A

公开(公告)日：1993-08-24

申请号：BR9300358

申请日：1993-01-28

Applicant: IBM

Inventor： BARTOW NEIL B ,  BROWN PAUL J ,  CAPOWSKI ROBERT S ,  FASANO LOUIS T ,  GREGG THOMAS A ,  SALYER GREGORY ,  SUGRUE PATRICK J ,  WESTCOTT DOUGLAS W ,  ZEYAK VINCENT P JR

IPC: H04J3/06 ,  H04L25/02 ,  H04L69/40 ,  H04B10/12

Abstract: A system and method for asynchronously transmitting data blocks, in parallel, across multiple fibers in a serial manner. Frame groups are provided as a mechanism to transmit associated data serially on each fiber and tie the data being transmitted together. The frame groups do not have sequence numbers, therefore, the receiver determines which frames are part of a frame group by the arrival times of the individual frames. In one embodiment, the transceivers for each member of the parallel bus asynchronously achieve synchronism at each end of the fiber. Thus the need for a common clock is eliminated. The receivers on each side of the bus determine the relative skew for each conductor by performing skew measurements on a calibration message generated by the transmitters on the other side of the bus. When the skew on all conductors, viewed from both sides of the bus, has been determined, the skew values are exchanged across the bus, thus enabling the transmitters to set proper frame spacing.