Traffic control method and network control system

• US 6,453,351 B1
• Filed: 09/13/1994
• Issued: 09/17/2002
• Est. Priority Date: 09/13/1993
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Endo, Noboru
• Primary Examiner(s): Follansbee, John A.
• Application Number:
  US08/305,188
• Time in Patent Office: 2,926 Days
• Field of Search: 395/800, 395/200, 395/200.12, 395/200.13, 370/94.1, 370/17, 370/60, 370/16, 370/229, 370/230, 370/232, 370/234, 709/227-229, 364/715.01
• US Class Current: 709/229
• CPC Class Codes: H04L 41/0803 Configuration setting
• CPC Class Codes: H04L 41/5054 Automatic deployment of services triggered by the service manager, e.g. service implementation by automatic configuration of network components
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/0894 Packet rate
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/724 at intermediate nodes, e.g. resource reservation protocol [RSVP]
• CPC Class Codes: H04L 47/822 Collecting or measuring resource availability data

Abstract

A traffic control method and apparatus for simplifying declaration of a traffic parameter and improving the utilization rate of a network having a plurality of nodes. Each of the nodes monitors a queuing delay of a cell and periodically sends a monitoring result to a network management system. The network management system stores monitoring results in a data base, estimates an average cell rate and peak cell rate by using delay information in a route, a declared peak cell rate, and the maximum data frame length obtained from the data base, decides whether to accept connection set-up, and generates a policing parameter when new connection set-up request is sent through a terminal. Each of the nodes monitors the peak cell rate and average cell rate for each connection. If an average cell rate monitoring result is extremely different from the above policing parameter request to the network management system. The network management system estimates an average cell rate again by using the database to update policing parameters.

Claims

1. A communication control method at a network management system for managing a network, wherein the network has a plurality of nodes, the network management system is connected to the nodes, has a database for storing network resource information of the network and a table for indicating correspondence between services provided by the network and communication conditions, the network resource information including information indicating a configuration of the network, a source terminal is connected to a first node of the nodes, and a destination terminal is connected to a second node of the nodes, the method comprising the steps of:

receiving from the source terminal a declaration of one of the services for conducting communication between the source terminal and the destination terminal;

determining a communication condition corresponding to the declaration by using the table; and

retrieving from the database a route for conducting communication between the source terminal and the destination terminal in accordance with the determined communication condition.

2. A communication control method according to claim 1, further comprising the step of:

directing nodes in the route to establish the route.

3. A network management system for controlling communication, wherein the network management system is connected to a plurality of nodes, and a source terminal is connected to a first node of the nodes, and a destination terminal is connected to a second node of the nodes, the network management system comprising:

a processing unit; and

a database for storing network resource information of the network, the network resource information including information indicating a configuration of the network;

a table for indicating correspondence between services provided by the network and communication conditions,

wherein the processing unit receives from the source terminal a declaration of one of the services for conducting communication between the source terminal and the destination terminal, determines a communication condition corresponding to the declaration by using the table, and retrieves from the database a route for conducting communication between the source terminal and the destination terminal in accordance with the determined communication condition.

4. A network management system according to claim 3, wherein the processing unit directs nodes in the route to establish the route.

5. A communication method at a network management system for managing a network, wherein the network has a plurality of nodes, the network management system is connected to the nodes and has a table for indicating correspondence between services provided by the network and communication conditions, a source terminal is connected to a first node of the nodes, and a destination terminal is connected to a second node of the nodes, the communication method comprising the steps of:

receiving from the source terminal a declaration of one of the services for conducting communication between the source terminal and the destination terminal;

determining a communication condition corresponding to the designation by using the table; and

establishing a route between the first node and the second node in accordance with the determined communication condition.

6. A network management system for controlling communication, wherein the network management system is connected to a plurality of nodes, and a source terminal is connected to a first node of the nodes, and a destination terminal is connected to a second node of the nodes, the network management system comprising:

a processing unit; and

a table for indicating correspondence between services provide by the network and communication conditions,

wherein the processing unit receives from the source terminal a declaration of one of the services for conducting communication between the source terminal and the destination terminal, determines a communication condition corresponding to the declaration by using the table, and establishes a route between the first node and the second node in accordance with the determined communication condition.