公开(公告)号：CA2082077C

公开(公告)日：1996-10-01

申请号：CA2082077

申请日：1992-11-04

Applicant: IBM

Inventor： BARTOW NEIL GEORGE ,  BROWN PAUL JOSEPH ,  CAPOWSKI ROBERT STANLEY ,  FASANO LOUIS THOMAS ,  GREGG THOMAS ANTHONY ,  SALYER GREGORY ,  SUGRUE PATRICK JOHN ,  WESTCOTT DOUGLAS WAYNE ,  ZEYAK VINCENT PAUL JR

IPC: H04J3/06 ,  H04L25/02 ,  H04B10/08 ,  H04B10/20 ,  G06F13/368

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：DE3177080D1

公开(公告)日：1989-08-31

申请号：DE3177080

申请日：1981-10-27

Applicant: IBM

Inventor： BROWN PAUL JOSEPH ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND

IPC: G06F11/00 ,  G06F13/00 ,  G06F13/12 ,  G06F15/16 ,  G06F15/177 ,  G06F13/14

公开(公告)号：ES2171161T3

公开(公告)日：2002-09-01

申请号：ES93301037

申请日：1993-02-12

Applicant: IBM

Inventor： BARTOW NIEL GEORGE ,  BROWN PAUL JOSEPH ,  CAPOWSKI ROBERT STANLEY ,  FASANO LOUIS THOMAS ,  CREGG THOMAS ANTHONY ,  SALYER GREGORY

IPC: G06F13/12 ,  G06F13/00 ,  G06F13/38 ,  H04L69/40

Abstract: Buffers 54,58 are provided in two elements 52,56 between which data is to be transferred wherein both buffers are managed solely by the originator of the data transfer. Only one transfer is required to transmit a message, and a second transfer acknowledges the completion of the function because message delivery to the receiver is guaranteed under the implemented protocol. When a request is sent, a message timer is started at the sender. When the normal response for the request is received, the timer is reset; however, if the duration of the message operation exceeds the timeout value, a message-timeout procedure is initiated. When the cancel command is issued, a second timer is set. If this timer is exceeded, subsequent cancel commands can be issued. If subsequent cancel commands are issued, a cancel complete command must be sent and responded to. Since the commands must be executed in the sequence in which they are received, a response to the cancel complete command ensures that there are no other cancel operation commands remaining in the receiver, allowing subsequent operations to start without danger of being cancelled.

公开(公告)号：DE69331449D1

公开(公告)日：2002-02-21

申请号：DE69331449

申请日：1993-02-12

Applicant: IBM

Inventor： BARTOW NIEL GEORGE ,  BROWN PAUL JOSEPH ,  CAPOWSKI ROBERT STANLEY ,  FASANO LOUIS THOMAS ,  CREGG THOMAS ANTHONY ,  SALYER GREGORY ,  WESTCOTT DOUGLAS WAYNE

IPC: G06F13/12 ,  G06F13/00 ,  G06F13/38 ,  H04L69/40

Abstract: Buffers 54,58 are provided in two elements 52,56 between which data is to be transferred wherein both buffers are managed solely by the originator of the data transfer. Only one transfer is required to transmit a message, and a second transfer acknowledges the completion of the function because message delivery to the receiver is guaranteed under the implemented protocol. When a request is sent, a message timer is started at the sender. When the normal response for the request is received, the timer is reset; however, if the duration of the message operation exceeds the timeout value, a message-timeout procedure is initiated. When the cancel command is issued, a second timer is set. If this timer is exceeded, subsequent cancel commands can be issued. If subsequent cancel commands are issued, a cancel complete command must be sent and responded to. Since the commands must be executed in the sequence in which they are received, a response to the cancel complete command ensures that there are no other cancel operation commands remaining in the receiver, allowing subsequent operations to start without danger of being cancelled.

公开(公告)号：DE69123104T2

公开(公告)日：1997-04-30

申请号：DE69123104

申请日：1991-06-17

Applicant: IBM

Inventor： BROWN PAUL JOSEPH ,  ELLIOTT JOSEPH CHARLES ,  HOPPE KARL HELMUTH ,  LYNCH KENNETH ROBERT ,  SACHS MARTIN WILLIAM

IPC: G06F13/14 ,  G06F13/40

Abstract: A computer I/O system which includes a dynamic switch (10) having a plurality of ports (P) and a plurality of link-level facilities, with each link-level facility being attached to an individual one of the ports (P). Whenever the state of a port (P) or its attached link-level facility is changed in such a way that the attached link-level facility's ability to communicate with another link-level facility might be affected, this fact is recognized by a dynamic switch control unit (20) which causes a state change notification (SCN) frame to be transmitted to all other link-level facilities which might be affected. The link-level facilities receiving such a state change notification then determine if any of the associations or potential associations with the link-level facility which caused the state change notification are affected.

公开(公告)号：DK146837C

公开(公告)日：1984-07-02

申请号：DK333470

申请日：1970-06-26

Applicant: IBM

Inventor： BEAUSOLEIL WILLIAM FRANCIS ,  BROWN PAUL JOSEPH

IPC: G06F13/10 ,  G06F13/42 ,  G06F3/04

公开(公告)号：CH631820A5

公开(公告)日：1982-08-31

申请号：CH1597077

申请日：1977-12-23

Applicant: IBM

Inventor： BROWN PAUL JOSEPH ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND ,  STRONG DAVID LADD

IPC: G06F9/48 ,  G06F9/46