Apparatus and methods for providing event-based data communications device configuration

• US 7,564,872 B1
• Filed: 07/12/2004
• Issued: 07/21/2009
• Est. Priority Date: 07/21/1999
• Status: Expired due to Fees

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Waclawsky, John G., Chawla, Hamesh
• Primary Examiner(s): LEE, CHI HO A
• Application Number:
  US10/889,390
• Time in Patent Office: 1,835 Days
• Field of Search: 370/465, 370/468, 709/226
• US Class Current: 370/468
• CPC Class Codes: H04L 47/20 Traffic policing
• 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 47/762 triggered by the network
• CPC Class Codes: H04L 47/801 Real time traffic
• CPC Class Codes: H04L 47/823 Prediction of resource usage
• CPC Class Codes: H04L 47/826 Involving periods of time
• CPC Class Codes: H04L 47/83 based on usage prediction

Abstract

A system and method are provided which enable a data communications device to be programmed to automatically and dynamically modify allocation of resources upon the occurrence of specific events or times without having to break active sessions of data communications. Resource allocations can be made by bandwidth reservations provided to a data communications device via a network policy or via individual bandwidth reservation messages. The bandwidth allocation information can specify a session of data communication and future bandwidth modification information, such as a time or event, that will cause the data communications device to modify an amount of bandwidth reserved for the specified session of data communications.

Claims

1. In a data communications device, a method to allocate bandwidth for transferring data, the method comprising:

based on bandwidth allocation information, programming the data communications device with a first configuration to provide a first throughput rate for an active session transferring data through the data communications device;

after instantiation of the active session and providing the first throughput rate, determining a bandwidth allocation modification to be made for the active session; and

in response to said determining, altering the first configuration to produce a second configuration in the data communications device to provide a second throughput rate for the active session transferring data through the data communications device;

wherein determining the bandwidth allocation modification to be made for the active session includes;

during the active session;

i) detecting an occurrence of an event identified in the bandwidth allocation information, the bandwidth allocation information being received prior to instantiation of the active session; and

ii) based on the occurrence of the event, identifying a bandwidth modification amount to change the first throughput rate in order to configure the data communications device to support the second throughput rate.

2. A method as in claim 1 further comprising:

at the data communications device, receiving the bandwidth allocation information associated with the active session prior to actually programming the data communications device with the first configuration and instantiation of the active session.

3. A method as in claim 1, wherein altering the first configuration includes:

modifying the first configuration at the data communications device without receiving further communications from sources external to the data communications device indicating how to modify the bandwidth allocation associated with the active session.

4. A method as in claim 1, wherein altering the first configuration at the data communications device occurs without receiving further communications from a host computer acting as at least one of a source and recipient of the data transferred through the data communications device.

5. A method as in claim 1 further comprising:

providing uninterrupted data transfers for the active session through the data communications device during a transition from the first configuration to the second configuration.

6. A method as in claim 1 further comprising:

maintaining the bandwidth allocation information at the data communications device, the bandwidth allocation information including bandwidth allocation modification information indicating an amount to modify currently allocated bandwidth associated with the active session in response to occurrence of a corresponding predetermined event.

7. A method as in claim 1, wherein detecting the occurrence of an event identified in the bandwidth allocation information includes detecting a time associated with implementing the second throughput rate at the data communications device.

8. A method as in claim 1 further comprising:

utilizing results from a bandwidth prediction algorithm to identify future events specifying when and how much to modify a bandwidth allocated for use by the active session, the bandwidth prediction algorithm providing a statistical analysis of a network in which the data communications device resides, the bandwidth prediction algorithm determining variations in bandwidth requirements for data types transferred over the network.

9. A method as in claim 1, receiving the bandwidth allocation information at the data communications device in the form of a network policy indicating when and by how much bandwidth the data communications device is to modify the amount of bandwidth allocated to the active session.

10. A method as in claim 9, wherein the network policy specifies a plurality of sessions of data communications, and for each of the plurality of sessions of data communication, also specifies various amounts of bandwidths to be allocated for each session of data communication at various times of operation of the data communications device.

11. A method as in claim 9, wherein the network policy specifies various amounts of bandwidth to be allocated at various times in a particular day according to a business cycle for a business operating the data communications device.

12. A method to allocate bandwidth for transferring data in a data communications device, the method comprising:

based on bandwidth allocation information, programming the data communications device with a first configuration to provide a first throughput rate for an active session transferring data through the data communications device;

after instantiation of the active session and providing the first throughput rate, determining a bandwidth allocation modification to be made for the active session;

in response to said determining, altering the first configuration to produce a second configuration in the data communications device to provide a second throughput rate for the active session transferring data through the data communications device; and

prior to instantiation of the active session and providing the first throughput rate, receiving the bandwidth allocation information in a form of a bandwidth reservation message identifying i) a particular data communication session to occur in the future, the particular data communication session eventually becoming the active session, ii) an amount of bandwidth to reserve in the data communications device for the particular data communication session, and iii) bandwidth allocation modification information which specifies predetermined event information upon which a future event causes modification to an amount of bandwidth associated with the particular data communication session.

13. The method of claim 12, wherein the predetermined event information defines a detectable business cycle and wherein the future event is a future time.

14. A method as in claim 12, wherein receiving the bandwidth allocation information in the form of a bandwidth reservation message includes receiving the bandwidth allocation information at the data communications device based on use of RSVP (Resource Reservation Protocol).

15. In a data communications device, a method of allocating bandwidth for transferring data, the method comprising:

based on bandwidth allocation information, programming the data communications device with a first configuration to provide a first throughput rate for an active session transferring the data through the data communications device;

during the active session and after providing the first throughput rate, detecting an occurrence of an event;

based on detecting the occurrence of the event, altering the first configuration to produce a second configuration in the data communications device in order to provide a second throughput rate for the active session transferring the data through the data communications device; and

utilizing results from a bandwidth prediction algorithm to identify future events specifying when and how much to modify a bandwidth allocated for use by the active session, the bandwidth prediction algorithm providing a statistical analysis of a network in which the data communications device resides, the bandwidth prediction algorithm determining variations in bandwidth requirements for data types transferred over the network.

16. A method to reserve bandwidth for use in a network, the method comprising:

generating a message including;

i) a reservation request message indicating an amount of bandwidth to be reserved for a session of data communication,

ii) a future time at which to modify the amount of bandwidth reserved for the session of data communication,

iii) an amount by which to modify the amount of bandwidth reserved for the session of data communication upon occurrence of the future time; and

transmitting the message to a data communications device in the network to reserve bandwidth to reserve bandwidth for transferring data through the data communications device.

17. A method comprising:

generating a message to configure a data communications device to transfer data through a network, the message including;

i) an identification of a data communication session; and

ii) future bandwidth allocation modification information associated with the identification of the data communication session, the future bandwidth allocation modification information allowing the data communications device to determine a future event, the occurrence of which causes the data communications device to modify an amount of bandwidth allocated to the data communication session, the future bandwidth allocation modification information including an indication of how much to modify the amount of bandwidth reserved for the data communication session; and

transmitting the message to the data communications device through the network.

18. A method as in claim 17, wherein the identification of the data communication session and the future bandwidth allocation modification information are embodied in an RSVP (Resource Reservation Protocol) bandwidth message.

19. A data communications device comprising:

a data transporter to support transferring data through the data communications device;

a bandwidth reservation processor coupled to the data transporter, a combination of the data transporter and bandwidth reservation processor supporting operations of;

based on bandwidth allocation information, programming the data transporter according to a first configuration to provide a first throughput rate for an active session transferring data through the data communications device;

after instantiation of the active session and providing the first throughput rate, determining a bandwidth allocation modification to be made for the active session;

in response to said determining, altering the first configuration to produce a second configuration in the data communications device to provide a second throughput rate for the active session transferring data through the data communications device;

receiving the bandwidth allocation information at the data communications device in the form of a network policy indicating when and by how much bandwidth the data communications device is to modify the amount of bandwidth allocated to the active session; and

wherein the network policy specifies a plurality of sessions of data communications, and for each of the plurality of sessions of data communication, also specifies various amounts of bandwidths to be allocated for each session of data communication at various times of operation of the data communications device.

20. A data communications device as in claim 19 further supporting operations of:

at the data communications device, receiving the bandwidth allocation information associated with the active session prior to actually programming the data communications device with the first configuration and instantiation of the active session.

21. A data communications device as in claim 19, wherein altering the first configuration includes:

modifying the first configuration at the data communications device without receiving further communications from sources external to the data communications device indicating how to modify the bandwidth allocation associated with the active session.

22. A data communications device as in claim 19, wherein altering the first configuration at the data communications device occurs without receiving further communications from a host computer acting as at least one of a source and recipient of the data transferred through the data communications device.

23. A data communications device as in claim 19 further supporting operations of:

providing uninterrupted data transfers for the active session through the data communications device during a transition from the first configuration to the second configuration.

24. A data communications device as in claim 19 further supporting operations of:

maintaining the bandwidth allocation information at the data communications device, the bandwidth allocation information including bandwidth allocation modification information indicating an amount to modify currently allocated bandwidth associated with the active session in response to occurrence of a corresponding predetermined event.

25. A data communications device as in claim 19 further supporting operations of:

prior to instantiation of the active session and providing the first throughput rate, receiving the bandwidth allocation information in a form of a bandwidth reservation message identifying i) a particular data communication session to occur in the future, the particular data communication session eventually becoming the active session, ii) an amount of bandwidth to reserve in the data communications device for the particular data communication session, and iii) bandwidth allocation modification information which specifies predetermined event information upon which a future event causes modification to an amount of bandwidth associated with the particular data communication session.

26. The data communications device of claim 25, wherein the predetermined event information defines a detectable business cycle and wherein the future event is a future time.

27. A data communications device as in claim 25, wherein receiving the bandwidth allocation information in the form of a bandwidth reservation message includes receiving the bandwidth allocation information at the data communications device based on use of RSVP (Resource Reservation Protocol).

28. A data communications device as in claim 19, wherein determining the bandwidth allocation modification to be made for the active session, during the active session, includes:

during the active session;

i) detecting an occurrence of an event identified in the bandwidth allocation information, the bandwidth allocation information being received prior to instantiation of the active session; and

ii) based on the occurrence of the event, identifying a bandwidth modification amount to change the first throughput rate in order to configure the data communications device to support the second throughput rate.

29. A data communications device as in claim 28, wherein detecting the occurrence of an event identified in the bandwidth allocation information includes detecting a time associated with implementing the second throughput rate at the data communications device.

30. A data communications device as in claim 19 further supporting operations of:

utilizing results from a bandwidth prediction algorithm to identify future events specifying when and how much to modify a bandwidth allocated for use by the active session, the bandwidth prediction algorithm providing a statistical analysis of a network in which the data communications device resides, the bandwidth prediction algorithm determining variations in bandwidth requirements for data types transferred over the network.

31. A data communications device as in claim 19, wherein the network policy specifies various amounts of bandwidth to be allocated at various times in a particular day according to a business cycle for a business operating the data communications device.

32. A computer program product having a computer-readable medium including computer program logic encoded thereon for allocating bandwidth in a data communications device, such that the computer program logic, when executed on at least one processing unit with the data communications device, causes the at least one processing unit to perform the steps of:

based on bandwidth allocation information, programming the data communications device with a first configuration to provide a first throughput rate for an active session transferring data through the data communications device;

after instantiation of the active session and providing the first throughput rate, determining a bandwidth allocation modification to be made for the active session; and

in response to said determining, altering the first configuration to produce a second configuration in the data communications device to provide a second throughput rate for the active session transferring data through the data communications device;

wherein determining the bandwidth allocation modification includes;

during the active session;

i) detecting an occurrence of an event; and

ii) processing the bandwidth allocation information to identify the second throughput rate to be used for transferring data through the data communications device.