Apparatus and method for selecting an optimum telecommunications link

• US 5,974,460 A
• Filed: 06/16/1997
• Issued: 10/26/1999
• Est. Priority Date: 06/16/1997
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: McBrearty, Gerald Francis, Shieh, Johnny Meng-Han, Maddalozzo, John Jr.
• Primary Examiner(s): Rinehart, Mark H.
• Assistant Examiner(s): Thompson, Marc D
• Application Number:
  US08/876,413
• Time in Patent Office: 862 Days
• Field of Search: 370/231, 370/232, 370/235, 370/237, 395/651, 395/200.68, 395/200.72, 395/200.3, 395/200.33, 395/200.54, 709/200, 709/203, 709/224, 709/242, 709/238, 709/227, 709/225
• US Class Current: 709/224
• CPC Class Codes: H04L 43/0894 Packet rate
• CPC Class Codes: H04L 43/50 Testing arrangements
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/101 based on network conditions

Abstract

A method 401 and implementing system 101 are provided in which a site selection program is operable to selectively initiate sample data transfers from a plurality of mirror sites 313 on the Internet, and to make a determination, prior to a selection of a site to be contacted for a download, as to which of the sites exhibits the best transfer rates at the time of the site selection. The methodology includes a cut-off time 507 process for terminating a sample operation of any one site if the transfer time for a predetermined number of bytes "X" exceeds a predetermined maximum amount of time "Y" for the sample operation for any particular site. When the maximum time is exceeded, the program stores the number of bytes transferred during that time for comparison with other site data. After all sites have been sampled, the program determines a selected site which exhibits the best rate of data transfer, and selectively initiates the establishment of a communication link with the selected site.

Claims

1. A method for selecting a best mirror site of a plurality of mirror sites available to a user of a computer system, wherein each of said mirror sites contains predetermined information sought to be accessed by said user, said method comprising:

establishing a communication link with each of the mirror sites available;

measuring a data transfer characteristic for each of the communication links;

choosing a selected mirror site based upon results obtained from said measuring, and;

using said selected mirror site to initiate a current access to said predetermined information.

2. The method as set forth in claim 1 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring including measuring time taken to transfer a predetermined number of bytes from each mirror site to said computer system.

3. The method as set forth in claim 1 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring including measuring bytes transferred from each mirror site to said computer system during a predetermined maximum sample time period for each site.

4. The method as set forth in claim 2 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring further including measuring bytes transferred from each mirror site to said computer system during a predetermined maximum sample time period for each site when less than said predetermined number of bytes is transferred during said maximum sample time period.

5. The method as set forth in claim 1 and further including:

providing a selection option on a display screen to the user for allowing the user to make a selection to initiate a determination of which of said mirror sites exhibits a fastest data transfer characteristic; and

displaying an activation area on a display screen wherein the user may select said activation area with an input device to initiate said determination.

6. The method as set forth in claim 5 wherein said input device is a mouse device.

7. The method as set forth in claim 5 wherein said input device is a keyboard device.

8. The method as set forth in claim 6 wherein said input device includes a keyboard device in addition to said mouse device.

9. A storage medium including machine readable indicia, said storage medium being selectively coupled to a reading device, said reading device being selectively coupled to processing circuitry within a computer system, said reading device being selectively operable to read said machine readable indicia and provide program signals representative thereof, said program signals being effective to cause said computer system to selectively determine a best one of a plurality of mirror site links available for access to provide information to be downloaded by a user, wherein each of said mirror sites contains predetermined information sought to be accessed by said user, said program signals being selectively operable to accomplish the steps of:

establishing a communication link with each of the mirror sites available in response to said sample site selection;

measuring a data transfer characteristic for each of the communication links;

choosing a selected mirror site based upon results obtained from said measuring, and;

using said selected mirror site to initiate a current access to said predetermined information.

10. The storage medium as set forth in claim 9 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring including measuring time taken to transfer a predetermined number of bytes from each mirror site to said computer system.

11. The storage medium as set forth in claim 9 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring including measuring bytes transferred from each mirror site to said computer system during a predetermined maximum sample time period for each site.

12. The storage medium as set forth in claim 10 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring further including measuring bytes transferred from each mirror site to said computer system during a predetermined maximum sample time period for each site when less than said predetermined number of bytes is transferred during said maximum sample time period.

13. The storage medium as set forth in claim 9 and further including:

providing a selection option on a display screen to the user for allowing the user to make a selection to initiate a determination of which of said mirror sites exhibits a fastest data transfer characteristic; and

displaying an activation area on a display screen wherein the user may select said activation area with an input device to initiate said determination.

14. The storage medium as set forth in claim 13 wherein said input device is a mouse device.

15. The storage medium as set forth in claim 13 wherein said input device is a keyboard device.

16. The storage medium as set forth in claim 14 wherein said input device includes a keyboard device in addition to said mouse device.

17. An information processing system, said information processing system being selectively operable for selecting a best mirror site of a plurality of mirror sites available to a user of a computer system, wherein each of said mirror sites contains predetermined information sought to be accessed by said user comprising:

a processing device;

a memory unit; and

a bus connecting said processing device and said memory unit, said processing device being selectively operable for executing a program from said memory for;

establishing a communication link with each of the mirror sites available in response to said sample site selection;

measuring a data transfer characteristic for each of the communication links;

choosing a selected mirror site based upon results obtained from said measuring, and;

using said selected mirror site to initiate a current access to said predetermined information.

18. The information processing system as set forth in claim 17 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring including measuring time taken to transfer a predetermined number of bytes from each mirror site to said computer system.

19. The information processing system as set forth in claim 17 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring including measuring bytes transferred from each mirror site to said computer system during a predetermined maximum sample time period for each site.

20. The information processing system as set forth in claim 18 wherein said data transfer characteristic is measured in bytes transferred per second, said measuring further including measuring bytes transferred from each mirror site to said computer system during a predetermined maximum sample time period for each site when less than said predetermined number of bytes is transferred during said maximum sample time period.

21. The information processing system as set forth in claim 17 and further including:

providing a selection option on a display screen to the user for allowing the user to make a selection to initiate a determination of which of said mirror sites exhibits a fastest data transfer characteristic; and

displaying an activation area on a display screen wherein the user may select said activation area with an input device to initiate said determination.

22. The information processing system as set forth in claim 21 wherein said input device is a mouse device.

23. The information processing system as set forth in claim 21 wherein said input device is a keyboard device.

24. The information processing system as set forth in claim 22 wherein said input device includes a keyboard device in addition to said mouse device.