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    17.
    发明专利
    未知

    公开(公告)号：DE60132437T2

    公开(公告)日：2009-01-08

    申请号：DE60132437

    申请日：2001-03-26

    Applicant: IBM

    Inventor： BASS BRIAN MITCHELL ,  CALVIGNAC JEAN LOUIS ,  HEDDES MARCO ,  SIEGEL MICHAEL STEVEN ,  VERPLANKEN FABRICE JEAN

    IPC: H04L12/54 ,  H04L47/52 ,  H04L47/56 ,  H04Q11/04

    Abstract: A system and method of moving information units from a network processor toward a data transmission network in a prioritized sequence which accommodates several different levels of service. The present invention includes a method and system for scheduling the egress of processed information units (or frames) from a network processing unit according to stored priorities associated with the various sources of the information units. The priorities in the preferred embodiment include a low latency service, a minimum bandwidth, a weighted fair queueing and a system for preventing a user from continuing to exceed his service levels over an extended period. The present invention includes a plurality of calendars with different service rates to allow a user to select the service rate which he desires. If a customer has chosen a high bandwidth for service, the customer will be included in a calendar which is serviced more often than if the customer has chosen a lower bandwidth.

    METHOD AND SYSTEM FOR FRAME AND PROTOCOL CLASSIFICATION
    19.
    发明专利
    METHOD AND SYSTEM FOR FRAME AND PROTOCOL CLASSIFICATION 未知

    公开(公告)号：CA2385339C

    公开(公告)日：2005-06-28

    申请号：CA2385339

    申请日：2000-12-21

    Applicant: IBM

    Inventor： JENKINS STEVEN KENNETH ,  SIEGEL MICHAEL STEVEN ,  CALVIGNAC JEAN LOUIS ,  BASS BRIAN MITCHELL ,  LEAVENS ROSS BOYD ,  VERPLANKEN FABRICE JEAN ,  HEDDES MARCO ,  DAVIS GORDON TAYLOR ,  GALLO ANTHONY MATTEO

    IPC: H04L12/28 ,  H04L12/46 ,  H04L12/56 ,  H04L45/60 ,  G06F9/46 ,  H04L29/06

    Abstract: A system and method of frame protocol classification and processing in a system for data processing (e.g., switching or routing data packets or frames). The present invention includes analyzing a portion of the frame according to predetermined tests, then storing key characteristics of the packet for use in subsequent processing of the frame. The key characteristic s for the frame (or input information unit) include the type of layer 3 protoc ol used in the frame, the layer 2 encapsulation technique, the starting instruction address, flags indicating whether the frame uses a virtual local area network, and the identity of the data flow to which the frame belongs. Much of the analysis is preferably done using hardware so that it can be completed quickly and in a uniform time period. The stored characteristics o f the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction addre ss and the location of the beginning of the layer 3 header as well as flags for the type of frame. That is, the instruction address or code entry point is used by the processor to start processing for a frame at the right place, based on the type of frame. Additional instruction addresses can be stacked and used sequentially at branches to avoid additional tests and branching instructions. Additionally, frames comprising a data flow can be processed a nd forwarded in the same order in which they are received.

    Method and system for controlling flows in sub-pipes of computer networks
    20.
    发明专利
    Method and system for controlling flows in sub-pipes of computer networks 未知

    公开(公告)号：AU4263801A

    公开(公告)日：2001-10-15

    申请号：AU4263801

    申请日：2001-03-30

    Applicant: IBM

    Inventor： HWANG DONGMING ,  JEFFERIES CLARK DEBS ,  SIEGEL MICHAEL STEVEN ,  SUDEEP KARTIK

    IPC: H04L12/54 ,  H04L12/70 ,  H04Q11/04 ,  H04L12/00

    Abstract: A method and system for controlling a plurality of sub-pipes in a computer network is disclosed. The computer network includes at least one switch. The plurality of sub-pipes utilizes the switch for transmitting traffic through the network. The method and system include allowing a minimum flow to be set for each of the plurality of sub-pipes and determining whether congestion exists for the pipe. The method and system also include controlling a flow in a sub-pipe of the plurality of sub-pipes only if congestion exists. Once congestion is determined to exist, the time set to control of sub-pipes is set significantly longer than for control over individual decreases or increases of the flows in sub-pipes. The flow is controlled such that the flow for the sub-pipe may be linearly increased if the flow for the sub-pipe of the plurality of sub-pipes is less than the minimum flow. The flow is also controlled such that the flow for the sub-pipe of the plurality of sub-pipes is exponentially decreased if the flow is greater than the minimum flow. In determining whether to increase or decrease the flow in a sub-pipe, a second definition of congestion may be used. Thus the traffic through the switch is stable.

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