公开(公告)号：JPH1093624A

公开(公告)日：1998-04-10

申请号：JP21373497

申请日：1997-08-07

Applicant: IBM

Inventor： MARIN GERALD ARNOLD ,  HUYNH LAP T ,  VAN VU KEN ,  ONVURAL RAIF O ,  GUN LEVENT ,  LING BOUCHUNG

IPC: H04L12/56

Abstract: PROBLEM TO BE SOLVED: To provide an extended adaptive speed base congestion control system for a packet transmission network which doesn't use a relative network queuing speed but uses an absolute network queuing speed as a measure of a congestion of a system. SOLUTION: Test transmission executed only after the latest out of a prescribed minimum time, reception of an acknowledgment from the preceding test, and transmission of a minimum data burst is included in other features of this congestion control system. This congestion control system gives less reduction of the speed in the case of a low speed and gives more reduction of the speed in the case of a high speed. A logarithmic speed control function presents this capability. All values in a speed reference table are changed in response to the excessive speed variance to realize speed damping. Finally, an available band width is fairly shared as a beginning point for start or exit from a defined speed damping area.

公开(公告)号：DE69331178T2

公开(公告)日：2002-08-14

申请号：DE69331178

申请日：1993-07-16

Applicant: IBM

Inventor： AHMADI HAMID ,  GUERIN ROCH ,  GUN LEVENT

IPC: H04L12/56

Abstract: In a packet communications network, the addition or deletion of a connection to the network by a user is governed by a link traffic metric which represents the effective capacity of each link in the network which participates in the packet connection route. The link metric is calculated in real-time and updated by simple vector addition or subtraction. Moreover, this link metric is also used to calculate leaky bucket parameters which govern the access of packets to the network once the connection is set up. A packet network using these link metrics and metric generation techniques provides maximum packet throughput while, at the same time, preserving grade of service guarantees.

公开(公告)号：AT209412T

公开(公告)日：2001-12-15

申请号：AT93480099

申请日：1993-07-16

Applicant: IBM

Inventor： AHMADI HAMID ,  GUERIN ROCH ,  GUN LEVENT

IPC: H04L12/56

Abstract: In a packet communications network, the addition or deletion of a connection to the network by a user is governed by a link traffic metric which represents the effective capacity of each link in the network which participates in the packet connection route. The link metric is calculated in real-time and updated by simple vector addition or subtraction. Moreover, this link metric is also used to calculate leaky bucket parameters which govern the access of packets to the network once the connection is set up. A packet network using these link metrics and metric generation techniques provides maximum packet throughput while, at the same time, preserving grade of service guarantees.

公开(公告)号：CA2099031A1

公开(公告)日：1994-02-20

申请号：CA2099031

申请日：1993-06-23

Applicant: IBM

Inventor： AHMADI HAMID ,  GUERIN ROCH ,  GUN LEVENT

IPC: H04L12/56 ,  H04L12/26 ,  H04Q1/24

Abstract: In a packet communications network, the addition or deletion of a connection to the network by a user is governed by a link traffic metric which represents the effective capacity of each link in the network which participates in the packet connection route. The link metric is calculated in real-time and updated by simple vector addition or subtraction. Moreover, this link metric is also used to calculate leaky bucket parameters which govern the access of packets to the network once the connection is set up. A packet network using these link metrics and metric generation techniques provides maximum packet throughput while, at the same time, preserving grade of service guarantees.

公开(公告)号：ES2166759T3

公开(公告)日：2002-05-01

申请号：ES93480099

申请日：1993-07-16

Applicant: IBM

Inventor： AHMADI HAMID ,  GUERIN ROCH ,  GUN LEVENT

IPC: H04L12/56

Abstract: In a packet communications network, the addition or deletion of a connection to the network by a user is governed by a link traffic metric which represents the effective capacity of each link in the network which participates in the packet connection route. The link metric is calculated in real-time and updated by simple vector addition or subtraction. Moreover, this link metric is also used to calculate leaky bucket parameters which govern the access of packets to the network once the connection is set up. A packet network using these link metrics and metric generation techniques provides maximum packet throughput while, at the same time, preserving grade of service guarantees.

公开(公告)号：DE69331178D1

公开(公告)日：2002-01-03

申请号：DE69331178

申请日：1993-07-16

Applicant: IBM

Inventor： AHMADI HAMID ,  GUERIN ROCH ,  GUN LEVENT

IPC: H04L12/56

Abstract: In a packet communications network, the addition or deletion of a connection to the network by a user is governed by a link traffic metric which represents the effective capacity of each link in the network which participates in the packet connection route. The link metric is calculated in real-time and updated by simple vector addition or subtraction. Moreover, this link metric is also used to calculate leaky bucket parameters which govern the access of packets to the network once the connection is set up. A packet network using these link metrics and metric generation techniques provides maximum packet throughput while, at the same time, preserving grade of service guarantees.

公开(公告)号：CA2089789C

公开(公告)日：1997-01-21

申请号：CA2089789

申请日：1993-02-18

Applicant: IBM

Inventor： AHMADI HAMID ,  CHEN JEANE SHU-CHUN ,  CHOW CHEE-SENG ,  GUERIN ROCH ,  GUN LEVENT ,  LEE ANTHONY MANGCHUEN ,  TEDIJANTO THEODORE E

IPC: G06F13/00 ,  H04L12/56 ,  H04Q3/42

Abstract: A packet communications system utilizes a route determining mechanism by identifying principal paths between the source and the destination in the system. Principal paths are minimum hop count paths with a transmission delay less than a specified threshold. Principal path links are accepted as legs of the optimum path, if feasible, i.e., if the resulting load on the link is less than a specified principal threshold. Secondary links are accepted only if the resulting load on the link is less than a specified secondary threshold, where the secondary threshold is less than the principal threshold. All paths must also have a transmission delay less than a specified threshold. Each request for a route includes the source node, the destination node, the load required, the maximum transmission delay and, if desired, the quality of service parameters which all of the legs of the route must satisfy. A modified Bellman-Ford breadth-first searchalgorithm is used to identify the principal links and, using these principal link identifications, determining the optimum path.

公开(公告)号：DE69327692T2

公开(公告)日：2000-07-06

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.

公开(公告)号：CA2099027A1

公开(公告)日：1994-03-11

申请号：CA2099027

申请日：1993-06-23

Applicant: IBM

Inventor： DERBY JEFFREY H ,  GUERIN ROCH ,  GUN 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 which produces the same loss probability distribution, but assumes that the distribution 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.

公开(公告)号：CA2089789A1

公开(公告)日：1993-10-29

申请号：CA2089789

申请日：1993-02-18

Applicant: IBM

Inventor： AHMADI HAMID ,  CHEN JEANE S-C ,  CHOW CHEE-SENG ,  GUERIN ROCH ,  GUN LEVENT ,  LEE ANTHONY M ,  TEDIJANTO THEODORE E

IPC: G06F13/00 ,  H04L12/56 ,  H04Q3/42