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    13.
    发明专利
    未知

    公开(公告)号：DE69327692D1

    公开(公告)日：2000-03-02

    申请号：DE69327692

    申请日：1993-08-24

    Applicant: IBM

    Inventor： AHMADI HAMID ,  GUERIN ROCH A ,  DERBY JEFFREY HASKELL ,  GUN LEVENT ,  MARIN GERALD ARNOLD ,  NAGHSHINEH MAMOUD ,  SOHRABY KHOSROW

    IPC: H04L29/06 ,  H04L12/56

    Abstract: A congestion control system for packet communications networks in which access to the network is controlled to prevent such congestion. Packets within the pre-specified statistical description of each packet source are marked as high priority ("green" packets) while packets exceeding the pre-specified characteristics are marked with a lower priority ("red" packets). The overall red packet rate is limited to prevent red packet saturation of the network. The introduction of red packets into the network is subjected to a degree of hysteresis to provide better interaction with higher layer error recovery protocols. The amount of hysteresis introduced into the red packet marking can be fixed or varied, depending on the statistics of the incoming data packets at the entry point to the network.

    TRAFFIC MEASUREMENTS FOR PACKET TRANSMISSION NETWORKS
    14.
    发明专利
    TRAFFIC MEASUREMENTS FOR PACKET TRANSMISSION NETWORKS 未知

    公开(公告)号：CA2099027C

    公开(公告)日：1999-01-19

    申请号：CA2099027

    申请日：1993-06-23

    Applicant: IBM

    Inventor： DERBY JEFFREY HASKELL ,  GUERIN ROCH ,  GUEN LEVENT

    IPC: H04L12/56 ,  H04N21/236 ,  H04N21/434 ,  H04Q11/04 ,  H04L12/26 ,  H04Q1/24

    Abstract: A packet communications network relies on a few simple parameters to characterize the wide variety of traffic offered to that network, such as peak bit rate, mean bit rate and average packet burst length. A better representation of many types of traffic relies on an equivalent burst length whi ch produces the same loss probability distribution, but assumes that the distributi on is uncorrelated and exponential. Access control and bandwidth management based on such an equivalent burst length produces improved decisions due to the more accurate representation of the actual traffic distribution.

    19.
    发明专利
    未知

    公开(公告)号：DE69325957T2

    公开(公告)日：2000-03-30

    申请号：DE69325957

    申请日：1993-05-19

    Applicant: IBM

    Inventor： CIDON ISRAEL ,  DAVENPORT DAVID WILLIAM ,  DERBY JEFFREY HASKELL ,  DUDLEY JOHN GARY ,  GOPAL INDER SARAT ,  JANNIELLO JAMES PATRICK ,  KAPLAN MARC ADAM ,  KOPERDA FRANK RICHARD ,  POTTER KENNETH HARVEY ,  KUTTEN SHAY

    IPC: H04L12/18 ,  H04L12/56

    Abstract: A packet communications system provides for point-to-point packet routing and broadcast packet routing to limited subsets of nodes in the network, using a routing field in the packet header which is processed according to two different protocols. A third protocol is provided in which a packet can be broadcast to the limited subset even when launched from a node which is not a member of the subset. The routing field includes a first portion which contains the route labels necessary to deliver the packet to the broadcast subset. A second portion of the routing field contains the broadcast subset identifier which can then be used to deliver the packet to all of the members of the broadcast subset. Provision is made to backtrack deliver the packet to the last node identified before the broadcast subset if that last node is itself a member of the subset.

    20.
    发明专利
    未知

    公开(公告)号：ES2136118T3

    公开(公告)日：1999-11-16

    申请号：ES93480059

    申请日：1993-05-19

    Applicant: IBM

    Inventor： CIDON ISRAEL ,  DAVENPORT DAVID WILLIAM ,  DERBY JEFFREY HASKELL ,  DUDLEY JOHN GARY ,  GOPAL INDER SARAT ,  JANNIELLO JAMES PATRICK

    IPC: H04L12/18 ,  H04L12/56

    Abstract: A packet communications system provides for point-to-point packet routing and broadcast packet routing to limited subsets of nodes in the network, using a routing field in the packet header which is processed according to two different protocols. A third protocol is provided in which a packet can be broadcast to the limited subset even when launched from a node which is not a member of the subset. The routing field includes a first portion which contains the route labels necessary to deliver the packet to the broadcast subset. A second portion of the routing field contains the broadcast subset identifier which can then be used to deliver the packet to all of the members of the broadcast subset. Provision is made to backtrack deliver the packet to the last node identified before the broadcast subset if that last node is itself a member of the subset.

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