Method and apparatus for adjusting a communication timer in a communication network

• US 6,747,993 B2
• Filed: 02/01/2001
• Issued: 06/08/2004
• Est. Priority Date: 02/01/2001
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Rinchiuso, Joseph
• Primary Examiner(s): Nguyen, Chau
• Assistant Examiner(s): Juntima, Nittaya
• Application Number:
  US09/775,244
• Publication Number:
  US 20030012222A1
• Time in Patent Office: 1,223 Days
• Field of Search: 370/350, 370/394, 370/465, 370/522, 370/252, 370/253, 370/468, 714/748, 714/749
• US Class Current: 370/468
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/1809 Selective-repeat protocols
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A method and apparatus for adjusting a communication timer (306) for a communication network is described herein and comprises a communication device (302) capable of receiving data indicating that a data transfer rate has varied from a previous data transfer rate to a new data transfer rate, determining the amount the data transfer rate has varied, and adjusting the communication timer (306) from one set timed interval to a different set timed interval to automatically account for the varying data transfer rate and for optimizing data transfer between networked components.

Claims

1. A method of optimizing data communications in a network comprising a transmitting component and a receiving component, the method comprising:

receiving data indicating that a data transfer rate has varied from a previous data transfer rate to a new data transfer rate;

determining an amount the data transfer rate has varied; and

adjusting a communication timer from one set timed interval to a different set timed interval to automatically account for the varying data transfer rate for optimizing data transfer between the networked components, wherein the amount the communication timer is adjusted is determined by calculating the a ratio of different transfer rates and multiplying by a frame size.

2. A method of optimizing data communications in a network comprising a transmitting component and a receiving component, the method comprising:

receiving data indicating that a data transfer rate has varied from a previous data transfer rate to a new data transfer rate;

determining an amount the data transfer rate has varied; and

adjusting a communication timer from one set timed interval to a different set timed interval to automatically account for the varying data transfer rate for optimizing data transfer between the networked components, wherein the data transfer rate has decreased and the amount the data transfer rate has varied is determined by dividing the previous data transfer rate by the new data transfer rate to provide a number of frames that accounts for the varying data transfer rate and multiplying the number of frames by an amount of time it takes to transmit a frame to provide the amount of time by which the one set timed interval is increased to the different set timed interval to account for the varying data transfer rate.

3. A method according to claim 2, the method further comprising:

sending an acknowledgment signal from the receiving component to the transmitting component;

initiating the communication timer to begin counting a set timed interval; and

monitoring the data transfer rate between the networked components.

4. A method of optimizing data communications in a network comprising a transmitting component and a receiving component, the method comprising:

receiving data indicating that a data transfer rate has varied from a previous data transfer rate to a new data transfer rate;

determining an amount the data transfer rate has varied; and

adjusting a communication timer from one set timed interval to a different set timed interval to automatically account for the varying data transfer rate for optimizing data transfer between the networked components, wherein the data transfer rate has increased and the amount the data transfer rate has varied is determined by dividing the new data transfer rate by the previous data transfer rate to provide a number of frames that accounts for the varying data transfer rate and multiplying the number of frames by an amount of time It takes to transmit a frame to provide the amount of time by which the one set timed interval is decreased to the different set timed interval to account for the varying data transfer rate.

5. A method according to claim 4, the method further comprising:

sending an acknowledgment signal from the receiving component to the transmitting component;

initiating the communication timer to begin counting a set timed interval; and

monitoring the data transfer rate between the networked components.

6. A method of optimizing data communications in a network comprising a transmitting component and a receiving component, the method comprising:

receiving data indicating that a data transfer rate has varied from a previous data transfer rate to a new data transfer rate;

determining an amount the data transfer rate has varied; and

adjusting a communication timer from one set timed interval to a different set timed interval to automatically account for the varying data transfer rate for optimizing data transfer between the networked components, wherein the receiving step includes receiving a data rate shift notification signal which comprises a data rate shift factor and the different set timed interval is equal to the data rate shift factor multiplied by a frame size.

7. A method according to claim 6, wherein the receiving step includes receiving an unrequested data signal indicating that the data transfer rate has varied from the previous data transfer rate to the new date transfer rate.

8. A method according to claim 6, wherein the adjusting step includes adjusting the communication timer proportionally to the amount the data transfer rate has varied.

9. A system for optimizing data communications in a network, the system comprising:

a transmitter for transmitting data to a receiver at a variety of data transfer rates;

a receiver for receiving data from the transmitter;

a processor for determining if the transmitted data has been received and for generating an acknowledgment signal in response to this determination; and

an adjustable timer that tracks an amount of time it takes to receive data after the acknowledgment signal has been generated and which is automatically adjusted from one set timed interval to a different set timed interval by the processor to account for varying data transfer rates wherein the generated acknowledgment signal is a negative acknowledgment (NAK) signal and the timer is automatically adjusted from one set timed interval to a different set timed interval by the processor upon receipt of a data rate shift notification signal.

10. A system according to claim 9, wherein the data rate shift notification signal comprises a data rate shift factor and the different set timed interval of the timer is equal to the data rate shift factor multiplied by the amount of time it takes to transmit one frame of data.

11. A system according to claim 9, wherein the generated acknowledgment signal is a negative acknowledgment (NAK) signal and the timer is automatically adjusted from one set timed interval to a different set timed interval by the processor upon receipt of an unrequested data signal.

12. A system according to claim 11, wherein the amount the timer is adjusted is determined by taking the amount of data requested divided by the amount of data received to obtain a rate shift factor and multiplying the rate shift factor by the amount of time necessary to transmit one frame of data.

13. A system according to claim 11, wherein the amount the timer is adjusted is determined by taking the amount of data received divided by the amount of data requested and multiplying by the amount of time necessary to transmit one frame of data.

14. An apparatus for optimizing data communication in a network, the apparatus comprising:

a communication device for receiving data at a variety of data transfer rates and transmitting an acknowledgment corresponding to the received data;

a communication timer for tracking an amount of time it takes to receive data after transmitting the acknowledgment; and

a processor configured to detect when the data transfer rate has changed and to adjust the communication timer from one set timed interval to a different set timed interval to account for the varying data transfer rate, wherein the communication device is a transceiver and the processor detects data transfer rate change via reception of a data rate shift notification signal which comprises a data rate shift factor and the different set timed interval is equal to the data rate shift factor multiplied by a frame size.

15. The apparatus of claim 14, wherein the acknowledgment is a negative acknowledgment (NAK) signal indicating that an error has occurred in receiving data and requesting retransmission of such data.

16. The apparatus of claim 14, wherein the acknowledgment is an acknowledgment (ACK) signal indicating that the data has been received successfully.

17. The apparatus of claim 14, wherein

the processor detects data transfer rate change via reception of an unrequested data signal.