Apparatus and method for adjusting a duty cycle to save power in a computing system

• US 7,787,403 B2
• Filed: 12/23/2004
• Issued: 08/31/2010
• Est. Priority Date: 12/23/2004
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Winterton, Richard R.
• Primary Examiner(s): Mattis; Jason E
• Assistant Examiner(s): Chery; Dady
• Application Number:
  US11/022,213
• Publication Number:
  US 20060140218A1
• Time in Patent Office: 2,077 Days
• Field of Search: 370/311, 370/318, 370/229, 370/231, 370/463, 370/419, 370/401, 370/465, 370/459, 370/458, 370/450, 370/394, 370/420, 370/522, 455/522, 713/300, 713/320, 713/323, 713/324, 713/330, 713/340
• US Class Current: 370/311
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 47/365 Dynamic adaptation of the packet size
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and system for adjusting a duty cycle to save power in a computing system is described. The system includes a network interface card (NIC) that has an active mode and a sleep mode. The NIC is coupled to an adjusting element that adjusts a duty cycle of the active time to the sleep time based at least in part on minimizing power consumption.

Claims

1. An apparatus for receiving data transmission from a transmitting device through a network, the apparatus comprising:

a network interface card (NIC) configured to communicatively couple to the network, the NIC including an active mode associated with receipt of data transmission and a sleep mode not associated with receipt of data transmission; and

a device coupled to the NIC, the device being resident in the apparatus and configured to

determine a data consumption rate of the apparatus to consume data received in the active model, the data being consumed at least in part while the NIC is in the sleep mode;

determine a duty cycle of the NIC between active and sleep mode and a data transmission rate to be used by the transmitting device, the duty cycle based at least in part on the determined data consumption rate, so that during the sleep mode of the duty cycle the apparatus'"'"' consumption of the received data is continuous;

request the transmitting device to transmit further data to be consumed by the apparatus; and

cause the NIC to operate according to the duty cycle.

2. The apparatus of claim 1, wherein the NIC including the active and sleep modes is configured to operate in accordance with the IEEE (Institute of Electrical and Electronics Engineers) 802.11 specification.

3. The apparatus of claim 1, wherein the apparatus is a mobile apparatus.

4. The apparatus of claim 3, wherein the mobile apparatus is a laptop.

5. The apparatus of claim 1, wherein the device coupled to the NIC is further configured to determine a signal strength for the apparatus and determine a packet size for data to be received by the apparatus based at least in part on the determined signal strength.

6. The apparatus of claim 5, wherein the device coupled to the NIC is further configured to check a lookup table to determine which packet size is a best match for the determined signal strength.

7. The apparatus of claim 1, wherein the device coupled to the NIC is further configured to determine a content type of content of the data to be received by the apparatus.

8. The apparatus of claim 7, wherein the device coupled to the NIC is further configured to determine the consumption rate and a packet size based at least in part on the content type of content of the data to be received by the apparatus.

9. An article of manufacture comprising:

a tangible computer readable storage medium; and

a plurality of programming instructions stored on the storage medium and configured to enable a machine operatively configured for receiving data transmission from a transmitting device through a network, the machine having an active mode associated with receipt of data transmission and a sleep mode not associated with receipt of data transmission, to

determine a data consumption rate of the machine, wherein the machine consumes data received in the active mode at the data consumption rate, while the NIC is in the sleep mode;

determine a duty cycle of the machine between active and sleep mode and a data transmission rate to be used by the transmitting device, the duty cycle based at least on the determined data consumption rate of the machine, so that during the sleep mode of the duty cycle the machine'"'"'s consumption of the received data is continuous;

request the transmitting device to transmit further data to be consumed by the machine;

receive the data requested for when the machine is in the active mode; and

consume the received data when the machine is in the sleep mode.

10. The article of manufacture of claim 9, wherein the programming instructions are further configured to enable the machine to determine the duty cycle of the machine based at least in part on minimizing power consumption.

11. The article of manufacture of claim 9, wherein the programming instructions are further configured to enable the machine to determine a signal strength for the machine.

12. The article of manufacture of claim 11, wherein the programming instructions are further configured to enable the machine to determine a packet size for data to be received by the machine based at least in part on the determined signal strength.

13. The article of manufacture of claim 9, wherein the programming instructions are further configured to enable the machine to determine a type of content of the data to be received by the machine and determine a packet size for the data to be received by the machine based at least in part on the content type.

14. The article of manufacture of claim 13, wherein the programming instructions are further configured to enable the machine to determine the consumption rate based at least in part on the type of content of the data to be received by the machine.

15. A method comprising:

determining, by a computing device, a data consumption rate of the computing device, wherein the computing device is configured to receive data transmission from a transmitting device through a network and to include an active mode associated with receipt of data transmission and a sleep mode not associated with receipt of data transmission, wherein the consumption rate is the rate at which the computing device consumes data while in the sleep mode, the data being received in the active mode;

determining, by the computing device, a duty cycle of the computing device between active and sleep mode and a data transmission rate to be used by the transmitting device, the duty cycle based at least in part on the determined data consumption rate of the computing device, so that during the sleep mode of the duty cycle the computing device'"'"'s consumption of the received data is continuous;

requesting, by the computing device, for the transmitting device to transmit further data to be consumed by the computing device;

receiving, by the computing device, the data requested for when the computing device is in the active mode; and

consuming, by the computing device, the received data at least when the computing device is in the sleep mode.

16. The method of claim 15, further comprising

detecting, by the computing device, whether the computing device is coupled to a network;

and

detecting, by the computing device, signal strength of the computing device coupled to the network;

wherein the determining of the data transmission rate is based at least in part on the detected signal strength.

17. The method of claim 16, further comprising

determining, by the computing device, a type of the data to be received by the computing device;

and

determining, by the computing device, a packet size based at least on the content type and the detected signal strength;

wherein the determining of the data consumption rate is based at least in part on the content type.