Power management of communication devices

• US 9,820,235 B2
• Filed: 07/13/2016
• Issued: 11/14/2017
• Est. Priority Date: 12/05/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Xiaoru, Cho, James Simon, Ng, Tao-Fei Samuel, Aida, Sreepathy Laxmanbabu
• Primary Examiner(s): Lee, Thomas
• Assistant Examiner(s): CHANG, VINCENT WEN-LIANG
• Application Number:
  US15/209,586
• Publication Number:
  US 20160323829A1
• Time in Patent Office: 489 Days
• CPC Class Codes: G06F 1/3296 by lowering the supply or operating voltage
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04W 52/0222 in packet switched networks
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/028 switching on or off only a part of the equipment circuit blocks
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for reducing power consumption in a communication device. The method includes determining, by the communication device, that a packet transmitted on a communication medium is not intended for the communication device and estimating a length of the packet. If the length is greater than a first threshold but less than a second threshold, selecting a first group of components of the communication device to which to reduce power. If the length is greater than the second threshold, selecting a second group of components of the communication device to which to reduce power. The second group of components includes the first group of components. The method includes reducing power to the selected group of components.

Claims

1. A method for reducing power consumption in a communication device, the method comprising:

determining, by the communication device, that a packet transmitted on a communication medium is not intended for the communication device;

determining a length of the packet based on a length field in a preamble of the packet;

estimating a time to process the packet based at least in part on the length;

if the length is greater than a first threshold but less than a second threshold, selecting a first group of components of the communication device to which to reduce power, wherein the first group of components includes a radio transmission unit, a radio receiver unit and a clock in the physical layer of the communication device;

if the length is greater than the second threshold, selecting a second group of components of the communication device to which to reduce power, wherein the second group of components includes a radio transmission unit, a radio receiver unit, a synthesizer and a clock in the physical layer of the communication device; and

reducing power to the selected group of components,

wherein the first threshold is related to a time to process a packet of a first length, the second threshold is related to a time to process a packet of a second length and the second length is greater than the first length.

2. The method of claim 1, wherein reducing power to the selected group of components in the communication device is based at least in part on a signal strength associated with the packet.

3. The method of claim 1, wherein reducing power to the selected group of components in the communication device is based at least in part on a determination by the communication device that a destination address in the packet is different than an address of the communication device.

4. The method of claim 3, wherein the address of the communication device is a partial AID assigned to the communication device.

5. A communication device capable of reducing power consumption, the communication device comprising:

a network interface having components including a radio receiver unit, a radio transmission unit, and a synthesizer; and

a processor communicatively coupled to the network interface, the processor configured to execute instructions to cause the communication device to;

determine that a packet transmitted on a communication medium is not intended for the communication device;

determine a length of the packet based on a length field in a preamble of the packet;

estimate a time to process the packet based at least in part on the length;

if the length is greater than a first threshold but less than a second threshold, select a first group of components of the communication device to which to reduce power, wherein the first group of components includes the radio transmission unit, the radio receiver unit and a clock in the physical layer of the communication device;

if the length is greater than the second threshold, select a second group of components of the communication device to which to reduce power, wherein the second group of components includes the radio transmission unit, the radio receiver unit, the synthesizer and a clock in the physical layer of the communication device; and

reduce power to the selected group of components,

wherein the first threshold is related to a time to process a packet of a first length, the second threshold is related to a time to process a packet of a second length and the second length is greater than the first length.

6. The communication device of claim 5, wherein reduce power to the selected group of components in the communication device is based at least in part on a signal strength associated with the packet.

7. The communication device of claim 5, wherein reduce power to the selected group of components in the communication device is based at least in part on a determination by the processor that a destination address in the packet is different than address of the communication device.

8. The communication device of claim 7, wherein the address of the communication device is a partial AID assigned to the communication device.

9. A non-transitory computer readable medium having instructions stored therein which, when executed by a processor of a communication device, cause the communication device to:

determine that a packet transmitted on a communication medium is not intended for the communication device;

determine a length of the packet based on a length field in a preamble of the packet;

estimate a time to process the packet based at least in part on the length;

if the length is greater than a first threshold but less than a second threshold, select a first group of components of the communication device to which to reduce power, wherein the first group of components includes a radio transmission unit, a radio receiver unit and a clock in the physical layer of the communication device;

if the length is greater than the second threshold, select a second group of components of the communication device to which to reduce power, wherein the second group of components includes a radio transmission unit, a radio receiver unit, a synthesizer and a clock in the physical layer of the communication device; and

reduce power to the selected group of components,

wherein the first threshold is related to a time to process a packet of a first length, the second threshold is related to a time to process a packet of a second length and the second length is greater than the first length.

10. The non-transitory computer readable medium of claim 9, wherein reduce power to the selected group of components in the communication device is based at least in part on a signal strength associated with the packet.

11. The non-transitory computer readable medium of claim 9, wherein reduce power to the selected group of components in the communication device is based at least in part on a determination by the communication device that a destination address in the packet is different than an address of the communication device.

12. The non-transitory computer readable medium of claim 11, wherein the address of the communication device is a partial AID assigned to the communication device.

13. A system for reducing power consumption in a communication device, the system comprising:

means for determining that a packet transmitted on a communication medium is not intended for the communication device;

means for determining a length of the packet based on a length field in a preamble of the packet;

estimate a time to process the packet based at least in part on the length;

if the length is greater than a first threshold but less than a second threshold, selecting a first group of components of the communication device to which to reduce power, wherein the first group of components includes a radio transmission unit, a radio receiver unit and a clock in the physical layer of the communication device;

if the length is greater than the second threshold, selecting a second group of components of the communication device to which to reduce power, wherein the second group of components includes a radio transmission unit, a radio receiver unit, a synthesizer and a clock in the physical layer of the communication device; and

means for reducing power to the selected group of components,

wherein the first threshold is related to a time to process a packet of a first length, the second threshold is related to a time to process a packet of a second length and the second length is greater than the first length.

14. The system of claim 13, wherein reducing power to the selected group of components in the communication device is based at least in part on a signal strength associated with the packet.

15. The system of claim 13, wherein reducing power to the selected group of components in the communication device is based at least in part on a determination by the communication device that a destination address in the packet is different than an address of the communication device.

16. The system of claim 15, wherein the address of the communication device is a partial AID assigned to the communication device.