公开(公告)号：JP2000151652A

公开(公告)日：2000-05-30

申请号：JP27757799

申请日：1999-09-29

Applicant: IBM

Inventor： BASSO CLAUDE ,  FICHOU ALINE ,  GALAND CLAUDE ,  NICOLAS LAURENT

IPC: H04L12/54 ,  H04L12/70 ,  H04Q11/04 ,  H04L12/28 ,  H04L12/66

Abstract: PROBLEM TO BE SOLVED: To provide a system and its method by which a bandwidth of a consecutive bit rate virtual path connection set up between a source node and a destination node is dynamically adjusted in a packet or cell exchange network comprising a transmission link and a plurality of interconnected nodes. SOLUTION: The network defines a bandwidth management server that accesses information relating to a network node and a transmission link. This server receives indication relating to an initial bandwidth reserved for connection every time virtual path connection or virtual channel connection is set up on the network. The server detects and uses in common the bandwidth available on the transmission link between consecutive bit rate virtual path connections whose bandwidth is adjustable in the consecutive or periodic mode and decides new bandwidth to each connection. A source node is informed of it every time new bandwidth is calculated and adjusts the bandwidth of the consecutive bit rate virtual path connection whose bandwidth is adjustable accordingly.

公开(公告)号：DE69920893T2

公开(公告)日：2006-03-09

申请号：DE69920893

申请日：1999-07-13

Applicant: IBM

Inventor： FICHOU ALINE ,  LE PENNEC JEAN-FRANCOIS ,  GALAND CLAUDE

IPC: H04L12/54 ,  H04L47/762 ,  H04Q11/04

Abstract: Disclosed herein is a connection bandwidth management process and system for use in a high speed packet switching network. The network comprises a plurality of switching nodes interconnected through a plurality of communication links. Each of the switching nodes comprises means for switching packets from at least one input link to at least one output link. Each of the output links are coupled to at least one buffer in the switching node for queuing packets before they are transmitted over the output link. Each of the communication links supports the traffic of a plurality of user connections statistically multiplexed over the link. Each user connection is allocated an initial agreed-upon bandwidth through the network, with each of the communication links being possibly oversubscribed. The connection bandwidth management process according to the invention comprises the steps of: Link monitoring data on the communication links are periodically received in a network monitoring center, and stored in a computer memory in the network monitoring center. Then, one monitored link is selected and the corresponding link monitoring data are retrieved from the computer memory. The link monitored data retrieved for the selected link is analyzed, and it is determined whether the selected link is oversubscribed or not. If it is determined that the selected link is oversubscribed and that the link monitoring data for the selected link satisfies at least one predetermined condition the bandwidth initially allocated to each of the connections boarded on the selected link is reallocated, such that, the sum of the reallocated bandwidth of the connections boarded on the selected link is less or equal to the total bandwidth capacity of the selected link. The process recycles until all the monitored links have been selected.

公开(公告)号：DE69927252D1

公开(公告)日：2005-10-20

申请号：DE69927252

申请日：1999-07-13

Applicant: IBM

Inventor： FICHOU ALINE ,  LE PENNEC JEAN-FRANCOIS ,  GALAND CLAUDE

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/70 ,  H04Q11/04

Abstract: Disclosed herein is a method and a system of network capacity planning for use in a high speed packet switching network. The network comprises a plurality of switching nodes interconnected through a plurality of communication links, each of the switching nodes comprises means for switching packets from at least one input link to at least one output link. Each of the output links is coupled to at least one buffer in the switching node for queuing packets before they are transmitted over the output link. The network capacity planning method of the invention comprises the following steps: In each of the switching nodes and for each of the output links, a time distribution of the occupancy of each buffer during a predetermined monitoring time period is measured, and stored in a centralized memory location. Then, the buffer occupancy time distribution data are retrieved from the centralized memory location in all the switching nodes, gathered and stored in a network dedicated server. These buffer occupancy time distribution data for all the nodes are transmitted from the dedicated network server to a network monitoring center. In the network monitoring center, the buffer occupancy time distribution data are integrated on a larger time scale, and stored. Finally, the integrated buffer occupancy time distribution data are used to apply network capacity planning actions to the network resources.

公开(公告)号：DE69927252T2

公开(公告)日：2006-06-29

申请号：DE69927252

申请日：1999-07-13

Applicant: IBM

Inventor： FICHOU ALINE ,  LE PENNEC JEAN-FRANCOIS ,  GALAND CLAUDE

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/70 ,  H04Q11/04

Abstract: Disclosed herein is a method and a system of network capacity planning for use in a high speed packet switching network. The network comprises a plurality of switching nodes interconnected through a plurality of communication links, each of the switching nodes comprises means for switching packets from at least one input link to at least one output link. Each of the output links is coupled to at least one buffer in the switching node for queuing packets before they are transmitted over the output link. The network capacity planning method of the invention comprises the following steps: In each of the switching nodes and for each of the output links, a time distribution of the occupancy of each buffer during a predetermined monitoring time period is measured, and stored in a centralized memory location. Then, the buffer occupancy time distribution data are retrieved from the centralized memory location in all the switching nodes, gathered and stored in a network dedicated server. These buffer occupancy time distribution data for all the nodes are transmitted from the dedicated network server to a network monitoring center. In the network monitoring center, the buffer occupancy time distribution data are integrated on a larger time scale, and stored. Finally, the integrated buffer occupancy time distribution data are used to apply network capacity planning actions to the network resources.

公开(公告)号：DE69920893D1

公开(公告)日：2004-11-11

申请号：DE69920893

申请日：1999-07-13

Applicant: IBM

Inventor： FICHOU ALINE ,  LE PENNEC JEAN-FRANCOIS ,  GALAND CLAUDE

IPC: H04L12/54 ,  H04L47/762 ,  H04Q11/04 ,  H04L12/56

Abstract: Disclosed herein is a connection bandwidth management process and system for use in a high speed packet switching network. The network comprises a plurality of switching nodes interconnected through a plurality of communication links. Each of the switching nodes comprises means for switching packets from at least one input link to at least one output link. Each of the output links are coupled to at least one buffer in the switching node for queuing packets before they are transmitted over the output link. Each of the communication links supports the traffic of a plurality of user connections statistically multiplexed over the link. Each user connection is allocated an initial agreed-upon bandwidth through the network, with each of the communication links being possibly oversubscribed. The connection bandwidth management process according to the invention comprises the steps of: Link monitoring data on the communication links are periodically received in a network monitoring center, and stored in a computer memory in the network monitoring center. Then, one monitored link is selected and the corresponding link monitoring data are retrieved from the computer memory. The link monitored data retrieved for the selected link is analyzed, and it is determined whether the selected link is oversubscribed or not. If it is determined that the selected link is oversubscribed and that the link monitoring data for the selected link satisfies at least one predetermined condition the bandwidth initially allocated to each of the connections boarded on the selected link is reallocated, such that, the sum of the reallocated bandwidth of the connections boarded on the selected link is less or equal to the total bandwidth capacity of the selected link. The process recycles until all the monitored links have been selected.