Energy efficient quality of service aware communication over multiple air-links

• US 9,736,769 B2
• Filed: 10/01/2009
• Issued: 08/15/2017
• Est. Priority Date: 10/01/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Rajkotia, Amol, Krishnaswamy, Dilip, Das, Soumya, Rajamani, Krishnan, Dural, Ozgur
• Primary Examiner(s): KHAJURIA, SHRIPAL K
• Application Number:
  US12/571,585
• Publication Number:
  US 20110080868A1
• Time in Patent Office: 2,875 Days
• Field of Search: 370318
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method, an apparatus, and a machine-readable medium are provided for wireless communication in which at least two modems are selected from a set of modems for the wireless communication based on quality of service requirements for and an energy consumption of the wireless communication. In addition, the selected at least two modems are utilized concurrently for the wireless communication.

Claims

1. A method for wireless communication, comprising:

selecting, within an apparatus, at least two modems from a set of modems for a wireless communication based on;

a transmission efficiency for the at least two modems, the transmission efficiency based on a bit rate of the wireless communication and an energy consumption of the at least two modems that is independent of the bit rate, and

quality of service requirements for the wireless communication as determined by at least one application running on the apparatus;

wherein the selecting the at least two modems comprises;

obtaining a capacity bit rate and an energy efficiency for each modem in the set of modems;

determining combinations of two or more modems in the set of modems that together, based on the corresponding capacity bit rates for each of the modems in the combinations, would provide a requisite bit rate required by the quality of service requirements;

determining an energy consumption for each of said combinations of two or more modems; and

selecting one of said combinations of two or more modems with the lowest energy consumption; and

utilizing the selected at least two modems concurrently for the wireless communication.

2. The method of claim 1, wherein the selecting is based on satisfying the quality of service requirements and minimizing the energy consumption of the at least two modems.

3. The method of claim 1, further comprising:

determining when the quality of service requirements are not being satisfied; and

selecting a new set of modems for the wireless communication based on the quality of service requirements for and the energy consumption of the at least two modems, the new set of modems comprising at least two modems; and

utilizing the new set of modems concurrently for the wireless communication.

4. The method of claim 1, further comprising determining the set of modems by including modems in the set of modems that are common between the apparatus and another apparatus.

5. The method of claim 1, further comprising informing another apparatus of the selected at least two modems.

6. The method of claim 1, further comprising:

obtaining metric information and energy consumption information for each modem in the set of modems;

obtaining the quality of service requirements for an application on the apparatus;

determining that the at least two modems would satisfy the quality of service requirements based on the obtained metric information for the at least two modems; and

determining that the at least two modems would minimize an energy consumption for the wireless communication based on the obtained energy consumption information, wherein the selecting of the at least two modems from the set of modems for a wireless communication is further based on the determined energy consumption.

7. The method of claim 6, wherein the quality of service requirements comprise a bit rate, a bit error rate, and a latency.

8. The method of claim 6, wherein the metric information comprises at least one estimate related to a data rate, a signal-to-noise ratio, a link quality indicator, a link utilization indicator, a packet error rate, or a media-access-control transfer queue length.

9. The method of claim 8, wherein the at least one estimate is determined based on previous measurements of performance metrics and an increasing or decreasing linear or nonlinear trend related to the performance metrics.

10. The method of claim 1, wherein the energy consumption of the at least two modems is also dependent on a modulation and coding scheme selected for the wireless communication.

11. The method of claim 1, wherein the selecting the at least two modems comprises:

obtaining a capacity bit rate and an energy consumption at the capacity bit rate for each modem in the set of modems;

determining a corresponding energy efficiency per bit for each modem in the set of modems based on the capacity bit rate and the energy consumption at the capacity bit rate and the energy consumption that is independent of the bit rate;

selecting a modem in the set of modems with the best energy consumption per bit; and

repeatedly selecting an additional modem in the set of modems with a next best energy consumption per bit until a sum of the capacity bit rates of the selected modems is greater than or equal to a requisite bit rate as required by the quality of service requirements, said selected modems comprising said at least two modems.

12. The method of claim 11, wherein selecting the at least two modems further comprises:

deselecting one or more of the modems from the selected modems to reduce energy consumption if the sum of the capacity bit rates of the other selected modems is greater than or equal to the requisite bit rate.

13. The method of claim 1, wherein the energy consumption of the at least two modems that is independent of the bit rate is an energy consumed by each of the at least two modems being in an on-state.

14. The method of claim 13, wherein the transmission efficiency for the at least two modems is determined based on the energy consumption of the at least two modems that is independent of the bit rate and a separate dependent component that is energy consumed by each of the at least two modems as a function of a data transmission associated with the wireless communication.

15. An apparatus for wireless communication, comprising:

means for selecting, within an apparatus, at least two modems from a set of modems for a wireless communication based on;

a transmission efficiency for the at least two modems, the transmission efficiency based on a bit rate of the wireless communication and an energy consumption of the at least two modems that is independent of the bit rate, and

quality of service requirements for the wireless communication as determined by at least one application running on the apparatus;

wherein the means for selecting the at least two modems comprises;

means for obtaining a capacity bit rate and an energy efficiency for each modem in the set of modems;

means for determining subsets of modems in the set of modems that together, based on the capacity bit rate for each of the modems in the set of modems, would provide a requisite bit rate as required by the quality of service requirements; and

means for determining an energy efficiency for each of said subsets of modems; and

means for utilizing the selected at least two modems concurrently for the wireless communication.

16. The apparatus of claim 15, wherein the at least two modems are selected based on satisfying the quality of service requirements and minimizing the energy consumption of the at least two modems.

17. The apparatus of claim 15, further comprising:

means for determining when the quality of service requirements are not being satisfied; and

means for selecting a new set of modems for the wireless communication based on the quality of service requirements for and an energy consumption of the new set of modems, the new set of modems comprising at least two modems; and

means for utilizing the new set of modems concurrently for the wireless communication.

18. The apparatus of claim 15, further comprising means for determining the set of modems by including modems in the set of modems that are common between the apparatus and another apparatus.

19. The apparatus of claim 15, further comprising means for informing another apparatus of the selected at least two modems.

20. The apparatus of claim 15, further comprising:

means for obtaining metric information and energy efficiency information for each modem in the set of modems;

means for determining that the at least two modems would satisfy the quality of service requirements based on the obtained metric information for the at least two modems; and

means for determining that the at least two modems would minimize an energy consumption for the wireless communication based on the obtained energy efficiency information.

21. The apparatus of claim 20, wherein the quality of service requirements comprise a bit rate, a bit error rate, and a latency.

22. The apparatus of claim 20, wherein the metric information comprises at least one estimate related to a data rate, a signal-to-noise ratio, a link quality indicator, a link utilization indicator, a packet error rate, or a media-access-control transfer queue length.

23. The apparatus of claim 22, wherein the at least one estimate is determined based on previous measurements of performance metrics and an increasing or decreasing linear or nonlinear trend related to the performance metrics.

24. The apparatus of claim 15, wherein the energy consumption of each of the modems is also dependent on a modulation and coding scheme selected for each of the modems to perform the wireless communication.

25. The apparatus of claim 15, wherein the means for selecting the at least two modems comprises:

means for obtaining a capacity bit rate and an energy efficiency for each modem in the set of modems;

means for selecting a modem in the set of modems with the best energy efficiency; and

means for repeatedly selecting an additional modem in the set of modems with a next best energy efficiency until a sum of the capacity bit rates of the selected modems is greater than or equal to a requisite bit rate as required by the quality of service requirements, said selected modems comprising said at least two modems.

26. The apparatus of claim 25, wherein the means for selecting the at least two modems further comprises:

means for deselecting one or more of the modems from the selected modems to reduce energy consumption of the selected modems if the sum of the capacity bit rates of the other selected modems is greater than or equal to the requisite bit rate.

27. A non-transitory machine-readable medium having stored thereon instructions that, when executed, direct a machine to:

select, within an apparatus, at least two modems from a set of modems for a wireless communication based on;

a transmission efficiency for the at least two modems, the transmission efficiency based on a bit rate of the wireless communication and an energy consumption of the at least two modems that is independent of the bit rate, and

quality of service requirements for the wireless communication as determined by at least one application running on the apparatus;

wherein to select the at least two modems, the machine is further directed to;

obtain a capacity bit rate and an energy efficiency for each modem in the set of modems;

determine subsets of modems in the set of modems that together, based on the capacity bit rate for each of the modems in the set of modems, would provide a requisite bit rate as required by the quality of service requirements;

determine an energy efficiency for each of said subsets of modems; and

select one of said subsets of modems with the best energy efficiency, said one of said subsets of modems comprising said at least two modems; and

utilize the selected at least two modems concurrently for the wireless communication.

28. The machine-readable medium of claim 27, wherein the machine is directed to select based on satisfying the quality of service requirements and minimizing the energy consumption of the at least two modems.

29. The machine-readable medium of claim 27, wherein the machine is further directed to:

determine when the quality of service requirements are not being satisfied;

select a new set of modems for the wireless communication based on the quality of service requirements for and an energy consumption of the new set of modems, the new set of modems comprising at least two modems; and

utilize the new set of modems concurrently for the wireless communication.

30. The machine-readable medium of claim 27, wherein the machine is further directed to determine the set of modems by including modems in the set of modems that are common between the apparatus and another apparatus.

31. The machine-readable medium of claim 27, wherein the machine is further directed to inform another apparatus of the selected at least two modems.

32. The machine-readable medium of claim 27, wherein the machine is further directed to:

obtain metric information and energy efficiency information for each modem in the set of modems;

determine that the at least two modems would satisfy the quality of service requirements based on the obtained metric information for the at least two modems; and

determine that the at least two modems would minimize the energy consumption for the wireless communication based on the obtained energy efficiency information.

33. The machine-readable medium of claim 32, wherein the quality of service requirements comprise a bit rate, a bit error rate, and a latency.

34. The machine-readable medium of claim 32, wherein the metric information comprises at least one estimate related to a data rate, a signal-to-noise ratio, a link quality indicator, a link utilization indicator, a packet error rate, or a media-access-control transfer queue length.

35. The machine-readable medium of claim 34, wherein the at least one estimate is determined based on previous measurements of performance metrics and an increasing or decreasing linear or nonlinear trend related to the performance metrics.

36. The machine-readable medium of claim 27, wherein the energy consumption of each modem—

is also dependent on a modulation and coding scheme selected for use by the modem to perform the wireless communication.

37. The machine-readable medium of claim 27, wherein to select the at least two modems, the machine is further directed to:

obtain a capacity bit rate and an energy efficiency for each modem in the set of modems;

select a modem in the set of modems with the best energy efficiency; and

repeatedly select an additional modem in the set of modems with a next best energy efficiency until a sum of the capacity bit rates of the selected modems is greater than or equal to a requisite bit rate as required by the quality of service requirements, said selected modems comprising said at least two modems.

38. The machine-readable medium of claim 37, wherein to select the at least two modems, the machine is further directed to:

deselect one or more of the modems from the selected modems to reduce energy consumption of the selected modems if the sum of the capacity bit rates of the other selected modems is greater than or equal to the requisite bit rate.

39. An apparatus for wireless communication, comprising:

a wireless interface comprising a set of modems; and

a processing system coupled to the wireless interface and configured to;

select at least two modems from the set of modems for a wireless communication based on;

a transmission efficiency for the at least two modems, the transmission efficiency based on a bit rate of the wireless communication and an energy consumption of the at least two modems that is independent of the bit rate, and

quality of service requirements for the wireless communication as determined by at least one application running on the apparatus;

wherein to select the at least two modems, the processing system is configured to;

obtain a capacity bit rate and an energy efficiency for each modem in the set of modems;

determine subsets of modems in the set of modems that together, based on the capacity bit rate for each of the modems in the set of modems, would provide a requisite bit rate as required by the quality of service requirements;

determine an energy efficiency for each of said subsets of modems; and

select one of said subsets of modems with the best energy efficiency, said one of said subsets of modems comprising said at least two modems; and

utilize the selected at least two modems concurrently for the wireless communication.

40. The apparatus of claim 39, wherein the processing system is configured to select the at least two modems based on satisfying the quality of service requirements and minimizing the energy consumption of the at least two modems.

41. The apparatus of claim 39, wherein the processing system is further configured to:

determine when the quality of service requirements are not being satisfied;

select a new set of modems for the wireless communication based on the quality of service requirements for and an energy consumption of the new set of modems, the new set of modems comprising at least two modems; and

utilize the new set of modems concurrently for the wireless communication.

42. The apparatus of claim 39, wherein the processing system is further configured to determine the set of modems by including modems in the set of modems that are common between the apparatus and another apparatus.

43. The apparatus of claim 39, wherein the processing system is further configured to inform, through the wireless interface, another apparatus of the selected at least two modems.

44. The apparatus of claim 39, wherein the processing system is further configured to:

obtain metric information and energy efficiency information for each modem in the set of modems;

determine that the at least two modems would satisfy the quality of service requirements based on the obtained metric information for the at least two modems; and

determine that the at least two modems would minimize an energy consumption for the wireless communication based on the obtained energy efficiency information.

45. The apparatus of claim 44, wherein the quality of service requirements comprise a bit rate, a bit error rate, and a latency.

46. The apparatus of claim 44, wherein the metric information comprises at least one estimate related to a data rate, a signal-to-noise ratio, a link quality indicator, a link utilization indicator, a packet error rate, or a media-access-control transfer queue length.

47. The apparatus of claim 46, wherein the at least one estimate is determined based on previous measurements of performance metrics and an increasing or decreasing linear or nonlinear trend related to the performance metrics.

48. The apparatus of claim 39, wherein the energy consumption of each of the at least two modems—

is also dependent on a modulation and coding scheme selected for use by the modem to perform the wireless communication.

49. The apparatus of claim 39, wherein to select the at least two modems, the processing system is configured to:

obtain a capacity bit rate and an energy efficiency for each modem in the set of modems;

select a modem in the set of modems with the best energy efficiency; and

repeatedly select an additional modem in the set of modems with a next best energy efficiency until a sum of the capacity bit rates of the selected modems is greater than or equal to a requisite bit rate as required by the quality of service requirements, said selected modems comprising said at least two modems.

50. The apparatus of claim 49, wherein to select the at least two modems, the processing system is further configured to:

deselect one or more of the modems from the selected modems to reduce energy consumption of the selected modems if the sum of the capacity bit rates of the other selected modems is greater than or equal to the requisite bit rate.

51. A method for wireless communication, comprising:

determining, for each modem in a set of modems in a wireless device, an energy efficiency of the modem;

determining, for each modem in the set of modems, a capacity data rate supported by the modem;

determining, for each of a plurality of combinations of at least two modems in the set of modems, a combined energy efficiency of the combination based on the energy efficiencies of the at least two modems in the combination;

determining, for each of the plurality of combinations of at least two modems in the set of modems, a cumulative capacity data rate supported by the at least two modems in the combination;

selecting a one of the plurality of combinations for a wireless communication, the selected one of the plurality of combinations being the combination having the greatest combined energy efficiency that also has a cumulative capacity data rate that satisfies a quality of service requirement for the wireless communication; and

transmitting the wireless communication using the at least two modems of the selected combination of at least two modems concurrently.

52. The method of claim 51, further comprising

determining when the quality of service requirement is not being satisfied;

selecting a second of the plurality of combinations for the wireless communication, the selected one of the plurality of combinations being the combination having the greatest combined energy efficiency that also has a cumulative capacity data rate that satisfies the quality of service requirement for the wireless communication; and

transmitting the wireless communication using the at least two modems of the selected second combination of at least two modems concurrently.

53. The method of claim 51, further comprising determining the set of modems by including modems in the set of modems that are common between the apparatus and another apparatus.

54. The method of claim 51, wherein the quality of service requirements comprise a bit rate, a bit error rate, and a latency.

55. The method of claim 51, wherein the energy efficiency comprises at least one of a dependent component that is dependent on a bit rate of the wireless communication or an independent component that is independent of the wireless communication.

56. The method of claim 55, wherein the energy efficiency is also dependent on a modulation and coding scheme selected for the wireless communication.

57. The method of claim 51, further comprising informing another apparatus of the selected at least two modems.

58. The method of claim 51, further comprising:

determining a new quality of service requirement in response to none of the combinations providing a cumulative capacity data rate that satisfies the quality of service requirement; and

selecting a one of the plurality of combinations for the wireless communication, the selected one of the plurality of combinations being the combination having the greatest combined energy efficiency that also has a cumulative capacity data rate that satisfies the new quality of service requirement for the wireless communication.