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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
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.
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公开(公告)号：AU4428779A
公开(公告)日：1979-09-13
申请号：AU4428779
申请日：1979-02-15
Applicant: IBM
Inventor： PASCOE ROBERT AUGUST , SPROTT CHARLES NORMAN , WESTCOTT DOUGLAS WAYNE
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公开(公告)号：DE69331449T2
公开(公告)日：2002-09-26
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
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.
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公开(公告)号：AT212136T
公开(公告)日：2002-02-15
申请号：AT93301037
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
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.
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公开(公告)号：CA2082078C
公开(公告)日：1996-11-19
申请号：CA2082078
申请日：1992-11-04
Applicant: IBM
Inventor： BARTOW NEIL GEORGE , CAPOWSKI ROBERT STANLEY , FASANO LOUIS THOMAS , GREGG THOMAS ANTHONY , SALYER GREGORY , WESTCOTT DOUGLAS WAYNE
Abstract: A system for the transmission of information between elements of a data processing complex and a method for establishing such a system. Two elements of a data processing system are connected by a physical link comprising multiple conductors attached to transceivers at channels in each data processing element. Once the transceivers have been synchronized, commands and responses are exchanged which ensure that all of the transceivers in a channel are connected to the same channel on the other end of the conductor. If the transceivers are considered configured and an entry is made in a Configured-Transceiver table. A search is made of an Allowed-Operational-Link table which contains sets of transceivers which are allowed to become operational links. The set of transceivers thus found, is compared against the Configured-Transceiver-Table to verify that all of the members of the set have been configured. If a match is found, this set of transceivers becomes an Intended-Operational-Link. The Intended-Operational-Link is verified to ensure that both channels agree on the set of conductors will form the operational link. If the Intended-Operational-Link verifies, the operational link is established therefrom.
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Patent Agency Ranking
公开(公告)号：DE3465231D1
公开(公告)日：1987-09-10
申请号：DE3465231
申请日：1984-11-14
Applicant: IBM
Inventor： MALEY GERALD ADRIAN , WESTCOTT DOUGLAS WAYNE
Abstract: An edge triggered polarity hold, clocked latch circuit is disclosed which requires the use of only a single clock line for operation. The latch circuit comprises three set-reset type latches (1, 2, 3). Each of two latches (1, 2) receives one set and one reset signal. The third latch (3) receives two reset signals and one set signal. A single clock signal is applied jointly to a reset terminal of the third latch (3) and of one of the first two latches (1, 2). A data signal is applied to the set terminal of the third latch (3). The other of the first two latches (1,2) constitutes the output latch (2) and is connected to receive the outputs of the remaining latches. The output latch (2) produces an output equal to an input data signal upon each occurrence of the leading edge of an input clock signal. The output is held (latched) until the occurrence of the next clock signal when the output becomes equal to the then existing input data signal.
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公开(公告)号：CH639216A5
公开(公告)日：1983-10-31
申请号：CH91779
申请日：1979-01-31
Applicant: IBM
Inventor： PASCOE ROBERT AUGUST , SPROTT CHARLES NORMAN , WESTCOTT DOUGLAS WAYNE
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公开(公告)号：AT185222T
公开(公告)日：1999-10-15
申请号：AT93100833
申请日：1993-01-21
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
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.
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公开(公告)号：CA2089771C
公开(公告)日：1996-10-01
申请号：CA2089771
申请日：1993-02-18
Applicant: IBM
Inventor： BARTOW NEIL GEORGE , BROWN PAUL JOSEPH , CAPOWSKI ROBERT STANLEY , FASANO LOUIS THOMAS , GREGG THOMAS ANTHONY , SALYER GREGORY , WESTCOTT DOUGLAS WAYNE
Abstract: Buffers are provided in two elements 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 canceled.
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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.
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