USER INPUT BASED ALLOCATION OF BANDWIDTH ON A DATALINK

• US 20080162630A1
• Filed: 03/10/2008
• Published: 07/03/2008
• Est. Priority Date: 02/03/2000
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Walters, Glen R., MOORE, VICTOR S.
• Granted Patent: US 7,562,152 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/722 at the destination endpoint, e.g. reservation of terminal resources or buffer space
• CPC Class Codes: H04L 47/724 at intermediate nodes, e.g. resource reservation protocol [RSVP]

Abstract

In a computer network, user input is used to control the bandwidth used by particular applications. Data is sent from either a data source computer or an intermediate computer (e.g. dial-up server) to a client computer according to the user input. The allocation of bandwidth may be managed from the client computer, data source computer, or intermediate computer. The user may set a limit on the baud rate used by particular applications.

Claims

1. A communication system for limiting a transmission rate of transmitting data from a server to a requesting computer in response to a user'"'"'s input, the communication system comprising:

a means for accepting a user request for a specified data item at a requesting computer, the specified data item to be delivered in its entirety prior to being accessed;

a means for accepting, at the requesting computer in response to accepting the user request for the specified data item, a user input speed setting, wherein the user input speed setting is not related to a speed that is associated with the specified data item;

a means for generating, at the requesting computer in response to accepting the user input speed setting, a speed indication signal that comprises a maximum transmission rate to be used in transmitting the specified data item from the server to the requesting computer, wherein the maximum transmission rate is based upon the user input speed setting and is less than the data rate of the data link and less than the data rate capacity of the requesting computer;

a means for receiving, at a server from the requesting computer, a request for the specified data item;

a means for receiving from the requesting computer in conjunction with receiving the request for the specified data item, a speed indication signal; and

a means for transmitting the specified data item from the server to the requesting computer, wherein the means for transmitting limits, at the server, an average rate while sending transmission of at least a portion of the specified data item across a data link from the server to the requesting computer to be not greater than the maximum transmission rate represented within the speed indication signal received from the requesting computer.

2. The communication system according to claim 1 in which the transmitting means comprises:

a means for determining, at the server in response to receiving the speed indication signal, a block size based at least on the speed indication signal;

a means for determining, at the server in response to receiving the speed indication signal, a period based at least on the speed indication signal, wherein the period is longer than the period required to transmit the block size at the data rate of the data link;

a means for transmitting, from the server in response to receiving the speed indication signal, a plurality of blocks of data, each of the blocks having the block size and being transmitted at intervals substantially equal to the period.

3. The communication system according to claim 1 further comprising means for reading the specified data item from a memory associated with the server computer.

4. The communication system according to claim 1, wherein:

the means for receiving, at the server, further receives at the server, from the requesting computer, a new speed indication signal containing a new indicated speed, the new speed indication signal being received subsequently to receiving the request and while the means for transmitting transmits the specified data item, and

wherein the means for transmitting the specified data item adjusts, in response to receiving the new speed indication signal, the average rate of transmission while continuing to transmit the specified data item to be not greater than the new indicated speed contained within the new speed indication signal, wherein the new indicated speed is less than the data rate of the data link and less than the data rate capacity of the requesting computer.

5. A communication system according to claim 1, wherein the speed indication signal is a quantity specifying a maximum data transmission rate corresponding to the user input speed setting.

6. The communication system according to claim 1, further comprising:

a means for accessing a remote computer indicated in an address included in the request, wherein the remote computer is not one of the server and the requesting computer; and

a means for receiving, at the server, the first specified data item from the remote computer.

7. The communication system according to claim 6, wherein the server comprises a dial-up server.

8. A computer readable storage medium containing programming instructions for limiting transmission rate of data being transmitted from a server to a requesting computer in response to a user'"'"'s input, the programming instructions comprising instructions for:

accepting a user request for a specified data item at a requesting computer, the specified data item to be delivered in its entirety prior to being accessed;

accepting, at the requesting computer in response to accepting the user request for the specified data item, a user input speed setting, wherein the user input speed setting is not related to a speed that is associated with the specified data item;

generating, at the requesting computer in response to accepting the user input speed setting, a speed indication signal that comprises a maximum transmission rate to be used in transmitting the specified data item from the server to the requesting computer, wherein the maximum transmission rate is based upon the user input speed setting and is less than the data rate of the data link and less than the data rate capacity of the requesting computer;

receiving, at a server from the requesting computer, a request for the specified data item;

receiving at the server from the requesting computer in conjunction with receiving the request for the specified data item, the speed indication signal; and

transmitting the specified data item from the server to the requesting computer, the transmitting comprising limiting, by the server, an average rate of transmission while sending at least a portion of the specified data item across a data link from the server to the requesting computer to be not greater than the maximum transmission rate represented within the speed indication signal received from the requesting computer.

9. The computer readable medium according to claim 8 wherein the programming instruction for transmitting comprise programming instructions for:

determining, at the server in response to receiving the speed indication signal, a block size based at least on the speed indication signal;

determining, at the server in response to receiving the speed indication signal, a period based at least on the speed indication signal, wherein the period is longer than the period required to transmit the block size at the data rate of the data link; and

transmitting, from the server in response to receiving the speed indication signal, a plurality of blocks of data, each of the blocks having the block size and being transmitted at intervals substantially equal to the period.

10. A computer readable medium according to claim 8, further comprising programming instructions for reading the specified data item from a memory associated with the server computer.

11. The computer readable medium according to claim 8, further comprising programming instructions for:

receiving at the server, from the requesting computer, a new speed indication signal containing a new indicated speed, the new speed indication signal being received subsequently to the receiving the request and during the transmitting the specified data item; and

adjusting, in response to receiving the new speed indication signal, the average rate of transmission while continuing the transmitting the specified data item to be not greater than the new indicated speed contained within the new speed indication signal, wherein the new indicated speed is less than the data rate of the data link and less than the data rate capacity of the requesting computer.

12. The computer readable medium according to claim 8, wherein the speed indication signal is a quantity specifying a maximum data transmission rate corresponding to the user input speed setting.

13. A computer readable medium according to claim 8, further comprising programming instructions for:

accessing a remote computer indicated in an address included in the request, wherein the remote computer is not one of the server and the requesting computer; and

receiving, at the server, the first specified data item from the remote computer.

14. The computer readable medium according to claim 13, wherein the server comprises a dial-up server.