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公开(公告)号：AT354830T
公开(公告)日：2007-03-15
申请号：AT00959157
申请日：2000-08-24
Applicant: IBM
Inventor： BASS BRIAN MITCHELL , CALVIGNAC JEAN LOUIS , HEDDES MARCO C , PATEL PIYUSH CHUNILAL , REVILLA JUAN GUILLERMO , SIEGEL MICHAEL STEVEN , VERPLANKEN FABRICE JEAN
IPC: G06F15/167 , G06F12/06 , G06F15/177 , H04L12/56 , H04Q11/04 , G06F15/16 , G06F12/00 , G06F13/16
Abstract: A network switch apparatus, components for such an apparatus, and methods of operating such an apparatus in which data flow handling and flexibility is enhanced by the cooperation of a plurality of memory elements and a plurality of interface processors formed on a semiconductor substrate. The memory elements and interface processors together form a network processor capable of cooperating with other elements in executing instructions directing the flow of data in a network. Access to the memory elements is controlled in a particular manner and under operative rules which provide controlled multiple accesses of the plurality of memory elements by the plurality of processors.
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公开(公告)号：CA2387101C
公开(公告)日：2006-01-03
申请号：CA2387101
申请日：2000-11-21
Applicant: IBM
Inventor： GALLO ANTHONY MATTEO , ROVNER SONIA KIANG , SIEGEL MICHAEL STEVEN , JEFFRIES CLARK DEBS , HEDDES MARCO , GORTI BRAHMANAND KUMAR , BASS BRIAN MITCHELL , AYDEMIR METIN
IPC: H04L47/30
Abstract: Methods, apparatus and program products for controlling a flow of a pluralit y of packets in a computer network are disclosed. The computer network include s a device defining a queue. The methods, apparatus and program products inclu de determining a queue level for the queue and determining an offered rate of t he plurality of packets to the queue. They also include controlling a transmission fraction of the plurality of packets to or from the queue, base d on the queue level, the offered rate and a previous value of the transmissio n fraction so that the transmission fraction and the queue level are criticall y damped if the queue level is between at least a first queue level and a seco nd queue level. Several embodiments are disclosed in which various techniques a re used to determine the manner of the control.
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公开(公告)号：AT280411T
公开(公告)日：2004-11-15
申请号：AT00983409
申请日：2000-12-21
Applicant: IBM
Inventor： BASS BRIAN MITCHELL , CALVIGNAC JEAN LOUIS , DAVIS GORDON TAYLOR , GALLO ANTHONY MATTEO , HEDDES MARCO , JENKINS STEVEN KENNETH , LEAVENS ROSS BOYD , SIEGEL MICHAEL STEVEN , VERPLANKEN FABRICE JEAN
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 characteristics for the frame (or input information unit) include the type of layer 3 protocol 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 of the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction address 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 and forwarded in the same order in which they are received.
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公开(公告)号：BR0109622A
公开(公告)日：2003-02-04
申请号：BR0109622
申请日：2001-03-30
Applicant: IBM
Inventor： GORTI BRAHMANAND KUMAR , HWANG DONGMING , JEFFERIES CLARK DEBS , SIEGEL MICHAEL STEVEN , SUDEEP KARTIK
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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公开(公告)号：AU2016601A
公开(公告)日：2001-07-16
申请号：AU2016601
申请日：2000-12-21
Applicant: IBM
Inventor： CALVIGNAC JEAN LOUIS , DAVIS GORDON TAYLOR , GALLO ANTHONY MATTEO , HEDDES MARCO , JENKINS STEVEN KENNETH , LEAVENS ROSS BOYD , SIEGEL MICHAEL STEVEN , VERPLANKEN FABRICE JEAN
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 characteristics for the frame (or input information unit) include the type of layer 3 protocol 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 of the frame are then used by the network processing complex in its processing of the frame. The processor is preconditioned with a starting instruction address 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 and forwarded in the same order in which they are received.
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Patent Agency Ranking
公开(公告)号：SG60146A1
公开(公告)日：1999-02-22
申请号：SG1997003968
申请日：1997-11-06
Applicant: IBM
Inventor： VANHUBEN GARY ALLEN , MUELLER JOSEPH LAWRENCE , WARNOCK THOMAS BERNARD , SIEGEL MICHAEL STEVEN
Abstract: A design control system suitable for use in connection with the design of integrated circuits and other elements of manufacture having many parts which need to be developed in a concurrent engineering environment with inputs provided by users and or systems which may be located anywhere in the world providing a set of control information for coordinating movement of the design information through development and to release while providing dynamic tracking of the status of elements of the bills of materials in an integrated and coordinated activity control system utilizing a repository which can be implemented in the form of a database (relational, object oriented, etc.) or using a flat file system. Once a model is created and/or identified by control information design libraries hold the actual pieces of the design under control of the system without limit to the number of libraries, and providing for tracking and hierarchical designs which are allowed to traverse through multiple libraries. Data Managers become part of the design team, and libraries are programmable to meet the needs of the design group they service.
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公开(公告)号：DE60319366D1
公开(公告)日：2008-04-10
申请号：DE60319366
申请日：2003-05-16
Applicant: IBM
Inventor： PEYRAVIAN MOHAMMAD , RINALDI MARK ANTHONY , SIEGEL MICHAEL STEVEN , SABHIKHI RAVINDER KUMAR
IPC: H04L47/724 , H04L12/40
Abstract: A Resource Reservation System includes a Token Generation Unit (TGU) which generates and circulates among nodes of a communications system a Slotted Token (SLT) message having sub-fields to carry identification number for each input port in a node and the resource available for each input port. On receiving the message the Resource Control Unit (RCU) in each node can write port identification number, available resource in appropriate sub-fields of the SLT message, and reserve resources in other nodes by adjusting information in the sub-field associated with the other nodes.
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公开(公告)号：DE60132437D1
公开(公告)日：2008-03-06
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
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.
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公开(公告)号：AT289727T
公开(公告)日：2005-03-15
申请号：AT01915553
申请日：2001-03-30
Applicant: IBM
Inventor： GORTI BRAHMANAND KUMAR , HWANG DONGMING , JEFFERIES CLARK DEBS , SIEGEL MICHAEL STEVEN , SUDEEP KARTIK
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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公开(公告)号：PL356725A1
公开(公告)日：2004-06-28
申请号：PL35672500
申请日：2000-11-21
Applicant: IBM
Inventor： AYDEMIR METIN , BASS BRIAN MITCHELL , JEFFRIES CLARK DEBS , ROVNER SONIA KIANG , SIEGEL MICHAEL STEVEN , GALLO ANTHONY MATTEO , GORTI BRAHMANAND KUMAR , HEDDES MARCO
Abstract: Methods, apparatus and program products for controlling a flow of a plurality of packets in a computer network are disclosed. The computer network includes a device defining a queue. The methods, apparatus and program products include determining a queue level for the queue and determining an offered rate of the plurality of packets to the queue. They also include controlling a transmission fraction of the plurality of packets to or from the queue, based on the queue level, the offered rate and a previous value of the transmission fraction so that the transmission fraction and the queue level are critically damped if the queue level is between at least a first queue level and a second queue level. Several embodiments are disclosed in which various techniques are used to determine the manner of the control.
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