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9 records (took 0.028 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE69017096T2

    公开(公告)日：1995-08-10

    申请号：DE69017096

    申请日：1990-05-29

    Applicant: IBM

    Inventor： GEYER JOEL ERWIN ,  LEE JOSEPH KINMAN ,  NORMAN VERNON ROBERTS ,  WILSON KENNETH THOMAS

    IPC: H04L12/433 ,  H04L12/42

    Abstract: A frame stripping algorithm for use in a ring communication network utilizing early token release wherein multiple frames can exist on the ring at one time. The algorithm introduces two new strip terminating conditions which supplement the three conditions applicable to a normal token release scheme. The first of these conditions occurs when the source address in a received message is not the same as the receiving station's address and no code violation errors have been detected. The second condition occurs when the receiving station detects an isolated ending delimiter without a preceding starting delimiter.

    2.
    发明专利
    未知

    公开(公告)号：DE69017141T2

    公开(公告)日：1995-08-10

    申请号：DE69017141

    申请日：1990-09-04

    Applicant: IBM

    Inventor： GEYER JOEL ERWIN ,  LEE JOSEPH KINMAN ,  NORMAN VERNON ROBERT ,  WILSON KENNETH THOMAS

    IPC: H04L12/433 ,  H04L12/42

    Abstract: A multi-frame stripping method for use in a token ring network utilizing early token release with multiple frames transmitted by multiple stations circulating around the ring. The method recovers the ring with minimum loss of data after detection of an error condition resulting in frame corruption. The transmitting station (10) is responsible for removing its own frames from the ring. With one or more of its frames corrupted, a station (10) terminates frame removal after the transmitter has finished transmitting when a frame is received from another station without code violation errors in the frame header if a frame counter (80) has returned to its initial value. The station (10) terminates stripping when only a single frame is transmitted and then becomes corrupted if an isolated ending delimiter is detected at the station. The station (10) also terminates stripping in the multi-frame case when the ending delimiter of the last frame transmitted by the source station is received without code violation error in the I-bit, if each preceding ending delimiter is correctly detected regardless of data corruption occurring in any frame header.

    3.
    发明专利
    未知

    公开(公告)号：DE69017142D1

    公开(公告)日：1995-03-30

    申请号：DE69017142

    申请日：1990-10-09

    Applicant: IBM

    Inventor： GEYER JOEL ERWIN ,  LEE JOSEPH KIRMAN ,  WILSON KENNETH THOMAS

    IPC: H04L12/433 ,  H04L12/42

    Abstract: A method for enabling the transmitter to decide the number of variable length frames that can be transmitted within the token holding timer window. The last frame decision algorithm enables the transmitter to set the intermediate frame bit in the ending delimiter to the right state to indicate the status of each frame in the transmitted frame sequence. A look-ahead technique is used to check the remaining transmit time available in the time window, and therefore, no ring bandwidth is wasted on partially transmitted aborted frames, effectively optimizing the throughput of the network. Since key variables in the last frame decision algorithm are software programmable, the algorithm is independent of ring speed. The algorithm counts transmitted octets instead of measuring transmission time in deciding whether to transmit an additional frame. The algorithm can be applied to either single frame or multiframe transmit mode and to either normal or early token release. It is applicable to both the IEEE 802.5 local area network standard for token ring networks and the ANSI X3T9.5 standard for FDDI.

    5.
    发明专利
    未知

    公开(公告)号：DE69017142T2

    公开(公告)日：1995-08-10

    申请号：DE69017142

    申请日：1990-10-09

    Applicant: IBM

    Inventor： GEYER JOEL ERWIN ,  LEE JOSEPH KIRMAN ,  WILSON KENNETH THOMAS

    IPC: H04L12/433 ,  H04L12/42

    Abstract: A method for enabling the transmitter to decide the number of variable length frames that can be transmitted within the token holding timer window. The last frame decision algorithm enables the transmitter to set the intermediate frame bit in the ending delimiter to the right state to indicate the status of each frame in the transmitted frame sequence. A look-ahead technique is used to check the remaining transmit time available in the time window, and therefore, no ring bandwidth is wasted on partially transmitted aborted frames, effectively optimizing the throughput of the network. Since key variables in the last frame decision algorithm are software programmable, the algorithm is independent of ring speed. The algorithm counts transmitted octets instead of measuring transmission time in deciding whether to transmit an additional frame. The algorithm can be applied to either single frame or multiframe transmit mode and to either normal or early token release. It is applicable to both the IEEE 802.5 local area network standard for token ring networks and the ANSI X3T9.5 standard for FDDI.

    6.
    发明专利
    未知

    公开(公告)号：DE69017141D1

    公开(公告)日：1995-03-30

    申请号：DE69017141

    申请日：1990-09-04

    Applicant: IBM

    Inventor： GEYER JOEL ERWIN ,  LEE JOSEPH KINMAN ,  NORMAN VERNON ROBERT ,  WILSON KENNETH THOMAS

    IPC: H04L12/433 ,  H04L12/42

    Abstract: A multi-frame stripping method for use in a token ring network utilizing early token release with multiple frames transmitted by multiple stations circulating around the ring. The method recovers the ring with minimum loss of data after detection of an error condition resulting in frame corruption. The transmitting station (10) is responsible for removing its own frames from the ring. With one or more of its frames corrupted, a station (10) terminates frame removal after the transmitter has finished transmitting when a frame is received from another station without code violation errors in the frame header if a frame counter (80) has returned to its initial value. The station (10) terminates stripping when only a single frame is transmitted and then becomes corrupted if an isolated ending delimiter is detected at the station. The station (10) also terminates stripping in the multi-frame case when the ending delimiter of the last frame transmitted by the source station is received without code violation error in the I-bit, if each preceding ending delimiter is correctly detected regardless of data corruption occurring in any frame header.

    8.
    发明专利
    未知

    公开(公告)号：DE69017096D1

    公开(公告)日：1995-03-30

    申请号：DE69017096

    申请日：1990-05-29

    Applicant: IBM

    Inventor： GEYER JOEL ERWIN ,  LEE JOSEPH KINMAN ,  NORMAN VERNON ROBERTS ,  WILSON KENNETH THOMAS

    IPC: H04L12/433 ,  H04L12/42

    Abstract: A frame stripping algorithm for use in a ring communication network utilizing early token release wherein multiple frames can exist on the ring at one time. The algorithm introduces two new strip terminating conditions which supplement the three conditions applicable to a normal token release scheme. The first of these conditions occurs when the source address in a received message is not the same as the receiving station's address and no code violation errors have been detected. The second condition occurs when the receiving station detects an isolated ending delimiter without a preceding starting delimiter.

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