Power management of communication devices

• US 9,832,730 B2
• Filed: 07/02/2015
• Issued: 11/28/2017
• 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
• Application Number:
  US14/790,576
• Publication Number:
  US 20150304951A1
• Time in Patent Office: 880 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 communication device receives at least a portion of a packet. Power is reduced to a subset of components of a communication device. The subset of components for which power is reduced is determined based, at least in part, on a length of the packet. The power is reduced for a time period based, at least in part, on the length of the packet.

Claims

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

receiving, by the communication device, at least a portion of a packet;

determining a subset of components of the communication device for which to reduce power based, at least in part, on a length of the packet, wherein the components include at least one component selected from a group consisting of a radio transmission unit, a radio receiver unit, a synthesizer and a clock in a physical layer of the communication device; and

reducing the power to the subset of the components for a time period based, at least in part, on the length of the packet and on determining by the communication device that the packet includes padded data to be discarded by the communication device,

wherein the components in the subset of the components vary based, at least in part, on the length of the packet.

2. The method of claim 1, wherein determining the subset of the components comprises:

determining that the subset of the components includes the radio transmission unit and the radio receiver unit; and

determining that the subset of the components further includes the clock in a physical layer of the communication device.

3. The method of claim 2, wherein determining the subset of the components further comprises:

determining a packet processing time needed for the communication device to process the packet; and

determining that the subset of the components further includes the synthesizer if the needed packet processing time is greater than a settling time for the synthesizer.

4. The method of claim 3, wherein the subset of the components further includes any additional units in the physical layer in response to, for each additional unit, the needed packet processing time being greater than a time needed by the communication device to restore the additional unit to an operational state.

5. The method of claim 1,

wherein the packet is received using Multi-User Multiple Input, Multiple Output (MU-MIMO).

6. The method of claim 1, wherein reducing the power to the subset of the components 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.

7. The method of claim 1,

wherein reducing the power to the subset of the components is based, at least in part, on determining by the communication device that a signal strength of the packet is higher than a signal strength threshold.

8. The method of claim 1,

wherein reducing the power to the subset of the components is based, at least in part, on determining by the communication device that a mismatch exists between at least one of a Group ID and a partial Association ID in the packet that identifies an intended destination of the packet and an identification of the communication device.

9. The method of claim 1,

wherein reducing the power to the subset of the components is based, at least in part, on determining by the communication device that a mismatch exists between a Media Access Control (MAC) address in the packet and a MAC address of the communication device.

10. The method of claim 1, further comprising:

restoring the power to the subset of the components prior to an end of a duration associated with the length of the packet.

11. The method of claim 1, further comprising:

determining the time period based, at least in part, on a duration associated with the length of the packet.

12. The method of claim 1, further comprising:

determining the length of the packet based, at least in part, on a length field in a preamble of the packet.

13. A communication device comprising:

a network interface having components including a radio receiver unit, a radio transmission unit, and a synthesizer, wherein the radio receiver unit is configured to receive at least a portion of a packet; and

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

determine a subset of the components for which to reduce power based, at least in part, on a length of the packet, wherein the components include at least one component selected from a group consisting of the radio transmission unit, the radio receiver unit, the synthesizer and a clock in a physical layer of the communication device; and

reduce the power to the subset of the components for a time period based, at least in part, on the length of the packet and on determining by the communication device that the packet includes padded data to be discarded by the communication device,

wherein the components in the subset of the components vary based, at least in part, on the length of the packet.

14. The communication device of claim 13, wherein the instructions to cause the communication device to determine the subset of the components comprise instructions to cause the communication device to:

determine that the subset of the components includes the radio transmission unit and the radio receiver unit; and

determine that the subset of the components further includes the clock in a physical layer of the communication device.

15. The communication device of claim 14, wherein the instructions to cause the communication device to determine the subset of the components comprise instructions to cause the communication device to:

determine a packet processing time needed for the communication device to process the packet; and

determine that the subset of the components further includes the synthesizer if the needed packet processing time is greater than a settling time for the synthesizer.

16. The communication device of claim 15,

wherein the instructions to cause the communication device to determine the subset of the components comprise instructions to cause the communication device to:

determine that the subset of the components further includes any additional units in the physical layer in response to, for each additional unit, the needed packet processing time being greater than a time needed by the communication device to restore the additional unit to an operational state.

17. The communication device of claim 13,

wherein the packet is received using Multi-User Multiple Input, Multiple Output (MU-MIMO).

18. The communication device of claim 13 wherein the instructions to cause the communication device to reduce the power to the subset of the components comprise instructions to cause the communication device to:

reduce the power to the subset of the components 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.

19. 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:

receive at least a portion of a packet;

determine a subset of components of the communication device for which to reduce power based, at least in part, on a length of the packet, wherein the components include at least one component selected from a group consisting of a radio transmission unit, a radio receiver unit, a synthesizer and a clock in a physical layer of the communication device; and

reduce the power to the subset of the components for a time period based, at least in part, on the length of the packet and on determining by the communication device that the packet includes padded data to be discarded by the communication device,

wherein the components in the subset of the components vary based, at least in part, on the length of the packet.

20. The non-transitory computer readable medium of claim 19, wherein the instructions to cause the communication device to determine the subset of the components comprise instructions to cause the communication device to:

determine that the subset of the components includes the radio transmission unit and the radio receiver unit; and

determine that the subset of the components further includes the clock in a physical layer of the communication device.

21. The non-transitory computer readable medium of claim 20, wherein the instructions to cause the communication device to determine the subset of the components comprise instructions to cause the communication device to:

determine a packet processing time needed for the communication device to process the packet; and

determine that the subset of the components further includes the synthesizer if the needed packet processing time is greater than a settling time for the synthesizer.

22. The non-transitory computer readable medium of claim 21, wherein the instructions to cause the communication device to determine the subset of the components comprise instructions to cause the communication device to:

determine that the subset of the components further includes any additional units in the physical layer in response to, for each additional unit, the needed packet processing time being greater than a time needed by the communication device to restore the additional unit to an operational state.

23. The non-transitory computer readable medium of claim 19, wherein the instructions which cause the communication device to reduce the power to the subset of the components are based, at least in part, on instructions which, when executed by the communication device, cause the communication device to:

determine that a signal strength of the packet is higher than a signal strength threshold.

24. The non-transitory computer readable medium of claim 19, wherein the instructions which cause the communication device to reduce the power to the subset of the components are based, at least in part, on instructions which, when executed by the communication device, cause the communication device to:

determine that a mismatch exists between at least one of a Group ID and a partial Association ID in the packet that identifies an intended destination of the packet and an identification of the communication device.

25. The non-transitory computer readable medium of claim 19, wherein the instructions which cause the communication device to reduce the power to the subset of the components are based, at least in part, on instructions which, when executed by the communication device, cause the communication device to:

determine that a mismatch exists between a Media Access Control (MAC) address in the packet and a MAC address of the communication device.

26. The non-transitory computer readable medium of claim 19, further comprising instructions which, when executed by the communication device, cause the communication device to:

restore the power to the subset of the components prior to an end of a duration associated with the length of the packet.

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

means for receiving, by the communication device, at least a portion of a packet;

means for determining a subset of components of the communication device for which to reduce power based, at least in part, on a length of the packet, wherein the components include at least one component selected from a group consisting of a radio transmission unit, a radio receiver unit, a synthesizer and a clock in a physical layer of the communication device; and

means for reducing the power to the subset of the components for a time period based, at least in part, on the length of the packet and on determining by the communication device that the packet includes padded data to be discarded by the communication device,

wherein the components in the subset of the components vary based, at least in part, on the length of the packet.

28. The system of claim 27, wherein the means for determining the subset of the components comprises:

means for determining that the subset of the components includes the radio transmission unit and the radio receiver unit; and

means for determining that the subset of the components further includes the clock in a physical layer of the communication device.

29. The system of claim 28, wherein the means for determining the subset of the components further comprises:

means for determining a packet processing time needed for the communication device to process the packet; and

means for determining that the subset of the components further includes the synthesizer if the needed packet processing time is greater than a settling time for the synthesizer.

30. The system of claim 29, wherein the subset of the components further includes any additional units in the physical layer in response to, for each additional unit, the needed packet processing time being greater than a time needed by the communication device to restore the additional unit to an operational state.

31. The system of claim 27, further comprising:

means for restoring the power to the subset of the components prior to an end of a duration associated with the length of the packet.