Adaptive allocation of last-hop bandwidth based on monitoring of end-to-end throughput

• US 7,330,893 B2
• Filed: 09/21/2005
• Issued: 02/12/2008
• Est. Priority Date: 05/13/2002
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bahl, Paramvir, Adya, Atul, Qiu, Lili
• Primary Examiner(s): Cardone; Jason D
• Assistant Examiner(s): Swearingen; Jeffrey R
• Application Number:
  US11/232,572
• Publication Number:
  US 20060020700A1
• Time in Patent Office: 874 Days
• Field of Search: 709226-229, 709232-233, 709/224
• US Class Current: 709/226
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• 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 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/762 triggered by the network
• CPC Class Codes: H04L 47/822 Collecting or measuring resource availability data
• CPC Class Codes: H04L 47/824 Applicable to portable or mobile terminals

Abstract

An improved method and system for optimizing the allocation of bandwidth within a network system is presented. When a client device is engaged in communication with a remote computing device, an access point measures the throughput of the connection between the client device and the network. If the throughput is less than the amount of bandwidth reserved for usage by the client device, the access point adjusts the amount of bandwidth allocated for the client device to an amount equivalent to the measured throughput multiplied by an error variance factor. This process is then repeated periodically for the duration of the communication between the client device and the remote computing device in order to continually adapt the bandwidth allocation of the client device. Optionally, the method and system can be also deployed in client devices instead of the access point.

Claims

1. A method for preventing the under utilization of reserved bandwidth by one or more client devices capable of communicating over a network by establishing a communicable link with an intermediate computing device that is communicably linked to the network, the method comprising:

receiving a bandwidth reservation request from a first client device;

determining whether the first client device has the same bandwidth requirement as at least one currently-connected client device; and

assigning the first client device the same bandwidth as the at least one currently-connected client device if the first client device has the same bandwidth requirement as the at least one currently-connected client device.

2. The method of claim 1 further comprising, establishing a link between the intermediate computing device and the first client device.

3. The method of claim 1 further comprising informing the first client device of the amount of bandwidth it is assigned.

4. The method of claim 1 wherein the step of determining further comprises comparing state information related to the first client device with state information related to the at least one currently-connected client device.

5. A computer-readable medium having computer-executable instructions for performing the steps recited in claim 1.

6. The method of claim 1, wherein determining whether the first client device has the same bandwidth requirement as a currently-connected client device comprises determining whether an application is executing on both the first client device and the at least one currently-connected client device.

7. The method of claim 1, wherein determining whether the first client device has the same bandwidth requirement as a currently-connected client device comprises determining a degree of similarity between an IP address of the currently-connected client device and an IP address of the first client device.

8. A system for preventing the wasting of reserved bandwidth by one or more client devices capable of communicating over a network by establishing a connection with an intermediate computing device that is communicably linked to the network, the system comprising:

means for receiving a bandwidth reservation request from a first client device having no current bandwidth allocation;

means for determining whether the first client device has the same bandwidth requirement as a currently-connected client device; and

means for assigning the first client device the same bandwidth as the currently-connected client device.

9. The system of claim 8 further comprising means for establishing a connection with the intermediate computing device by the first client device.

10. The system of claim 8 further comprising means for informing the first client device of the amount of bandwidth it is assigned.

11. The system of claim 8, wherein determining whether the first client device has the same bandwidth requirement as a currently-connected client device comprises determining whether an application is executing on both the first client device and the at least one currently-connected client device.

12. The system of claim 8, wherein determining whether the first client device has the same bandwidth requirement as a currently-connected client device comprises determining a degree of similarity between an IP address of the currently-connected client device and an IP address of the first client device.

13. A system for allocating bandwidth by one or more computers capable of communicating over a network by establishing a connection with an intermediate computing device that is linked to the network, the system comprising:

means for receiving a bandwidth reservation request from newly-connected computer having no current bandwidth allocation;

means for determining whether newly-connected computer has the same bandwidth requirement as a currently-connected computer by determining that applications executing on the currently-connected computer and the newly-connected computer have the same application data rate; and

means for assigning newly-connected computer the same bandwidth as the currently-connected computer.

14. The system of claim 13 further comprising means for establishing a connection with the intermediate computing device by the newly-connected computer.

15. The system of claim 13 further comprising means for informing the newly-connected computer of the amount of bandwidth it is assigned.