METHOD AND SYSTEM FOR IMPROVING WIRELESS COMMUNICATION IN TROUBLE SPOTS

• US 20090312005A1
• Filed: 06/16/2008
• Published: 12/17/2009
• Est. Priority Date: 06/16/2008
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: DEAN, Richard F., MUKUNDAN, Purandar
• Application Number:
  US12/139,898
• Publication Number:
  US 20090312005A1
• Time in Patent Office: Days
• US Class Current: 455/422.100
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

Wireless digital communications involving a mobile device are improved in troublesome locations to prolong a marginal mobile device connections and to avoid dropped calls by proactively improving signal-to-noise ratio. Signal to noise ratio may be increased by reducing the data transmission rate in a variety of ways. Such actions may be taken when current location of a mobile device is in a known troublesome location and/or a characteristic of the signal received by the mobile device is problematic. Similar actions may also be taken to conserve battery power when remaining battery charge drops below a preset criterion.

Claims

1. A method for maintaining call quality between a mobile device and a wireless network, comprising:

determining whether an active communication connection between the mobile device and wireless network is troublesome; and

reducing a rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome.

2. The method of claim 1, wherein determining whether the active connection between the mobile device and wireless network is troublesome comprises determining a current location of the mobile device and comparing the current location of the mobile device to a data base of known troublesome locations.

3. The method of claim 1, wherein determining whether the active connection between the mobile device and wireless network is troublesome comprises estimating a signal-to-noise ratio and determining whether the estimated signal-to-noise ratio is below a prescribed minimum.

4. The method of claim 1, wherein determining whether the active connection between the mobile device and wireless network is troublesome comprises determining an error rate and determining whether the error rate exceeds a prescribed maximum.

5. The method of claim 1, wherein determining whether the active connection between the mobile device and wireless network is troublesome comprises determining a vector of movement of the mobile device and extrapolating an expected location of the mobile device and comparing the extrapolated location of the mobile device to a database of known troublesome locations.

6. The method of claim 1, wherein reducing the data transmission rate is accomplished by using a more robust error detection and correction coding scheme.

7. The method of claim 6, wherein reducing the data transmission rate is accomplished by further using a more robust interleaving scheme.

8. The method of claim 1, wherein reducing the data transmission rate is accomplished by using a combination of reduced data rate, more robust error detection and correction coding scheme, and more robust interleaving scheme.

9. The method of claim 1, further comprising:

determining whether the active connection between the mobile device and wireless network is no longer troublesome; and

increasing the data transmission rate when the active connection is no longer troublesome.

10. A mobile device comprising:

a processor; and

a memory unit coupled to the processor, wherein the memory contains processor readable software instructions to;

determine whether an active connection between the mobile device and wireless network is troublesome;

reducing a rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome;

a transmitter for transmitting the reduced data rate criteria to a base station receiver; and

a receiver for receiving the reduced data rate criteria from the base station receiver.

11. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to determine a current location of the mobile device and compare the current location of the mobile device to a database of known troublesome locations stored in the memory.

12. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to estimate a signal-to-noise ratio of the communication signal received by the mobile device and determine whether the estimated signal-to-noise ratio is below a prescribed minimum.

13. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to determine an error rate of the communication signal received by the mobile device and to determine whether the error rate exceeds a prescribed maximum.

14. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to determine a vector of movement of the mobile device and extrapolate an expected location of the mobile device and compare the extrapolated location of the mobile device to a database of known troublesome locations stored in the memory.

15. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to reduce the rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome by using a more robust error detection and correction coding scheme for the communication signal.

16. The mobile device of claim 15, further wherein the memory contains processor readable software instructions to reduce the rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome by further using a more robust interleaving scheme for the communication signal.

17. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to reduce the rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome by using any of a combination of reduced data rate, more robust error detection and correction coding scheme, and more robust interleaving scheme for the communication signal.

18. The mobile device of claim 10, further wherein the memory contains processor readable software instructions to

determine whether the active connection between the mobile device and wireless network is no longer troublesome;

and

increase the data transmission rate when the active connection is no longer troublesome.

19. The mobile device of claim 11 further comprising a GPS receiver.

20. The mobile device of claim 11 further comprising an AGPS receiver.

21. The mobile device of claim 10 further wherein the receiver is capable of determining a characteristic of a received signal;

and

the transmitter is capable of altering its transmitted data rate, error coding scheme and interleaving scheme.

22. A mobile device comprising:

means for determining whether an active connection between the mobile device and wireless network is troublesome;

means for reducing a rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome.

23. The mobile device of claim 22, further comprising means for determining a current location of the mobile device and comparing the current location of the mobile device to a database of known troublesome locations.

24. The mobile device of claim 22, further comprising means for estimating a signal-to-noise ratio and determining whether the estimated signal-to-noise ratio is below a prescribed minimum.

25. The mobile device of claim 22, further comprising means for determining an error rate and determining whether the error rate exceeds a prescribed maximum.

26. The mobile device of claim 22, further comprising means for determining a vector of movement of the mobile device and means for extrapolating an expected location of the mobile device and means for comparing the extrapolated location of the mobile device to a database of known troublesome locations.

27. The mobile device of claim 22, further comprising means for implementing a more robust error detection and correction coding scheme for the communication signal.

28. The mobile device of claim 27, further comprising means for implementing a more robust interleaving scheme for the communication signal.

29. The mobile device of claim 22, further comprising means for implementing any of a combination of reduced data rate, more robust error detection and correction coding scheme, and more robust interleaving scheme for the communication signal.

30. The mobile device of claim 22, further comprising

means for determining whether the active connection between the mobile device and wireless network is no longer troublesome;

and

means for increasing the data transmission rate when the active connection is no longer troublesome.

31. A processor coupled to a wireless network for managing a plurality of voice and data calls from a plurality of mobile devices on a base station comprising:

a transmitter for transmitting altered transmission characteristic settings of a communication signal between one of the plurality of mobile devices and the base station; and

a receiver for receiving altered transmission characteristic settings of the communication signal between one of the plurality of mobile devices and the base station; and

a memory unit coupled to the processor, wherein the memory contains processor readable software instructions to;

determine whether an active connection between one of the plurality of mobile devices and base station is troublesome;

reducing a rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome.

32. The processor of claim 31, further wherein the memory contains processor readable software instructions to determine a current location of the one of the plurality of mobile devices and compare the current location of the one of the plurality of mobile devices to a database of known troublesome locations stored in the memory.

33. The processor of claim 31, further wherein the memory contains processor readable software instructions to estimate a signal-to-noise ratio of the communication signal received from the one of the plurality of mobile devices and determine whether the estimated signal-to-noise ratio is below a prescribed minimum stored in the memory.

34. The processor of claim 31, further wherein the memory contains processor readable software instructions to determine an error rate of the communication signal received from the one of the plurality of mobile devices and determine whether the error rate exceeds a prescribed maximum.

35. The processor of claim 31, further wherein the memory contains processor readable software instructions to determine a vector of movement of the one of the plurality of mobile devices and extrapolate an expected location of the one of the plurality of mobile devices and compare the extrapolated location of the one of the plurality of mobile devices to a database of known troublesome locations stored in the memory.

36. The processor of claim 31, further wherein the memory contains processor readable software instructions to reduce the rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome by using a more robust error detection and correction coding scheme for the communication signal transmitted by the base station to the one of the plurality of mobile devices.

37. The processor of claim 36, further wherein the memory contains processor readable software instructions to reduce the rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome by further using a more robust interleaving scheme for the communication signal transmitted by the base station to the one of the plurality of mobile devices.

38. The processor of claim 31, further wherein the memory contains processor readable software instructions to reduce the rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome by using any of a combination of reduced data rate, more robust error detection and correction coding scheme, and more robust interleaving scheme for the communication signal transmitted by the base station to the one of the plurality of mobile devices.

39. The processor of claim 31, further wherein the memory contains processor readable software instructions to

determine whether the active connection between the one of the plurality of mobile devices and wireless network is no longer troublesome;

and

increase the data transmission rate when the active connection is no longer troublesome.

40. A processor readable storage medium having stored thereon processor executable instructions configured to cause a processor to perform steps comprising:

determining whether an active connection between one of a plurality of mobile devices and a wireless network is troublesome;

reducing a rate at which data is transmitted over the active connection to or from the mobile device when the active connection is troublesome.

41. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of determining a current location of the one of the plurality of mobile devices and comparing the current location of the one of the plurality of mobile devices to a database of known troublesome locations.

42. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of estimating a signal-to-noise ratio of the communication signal transmitted and received by the one of the plurality of mobile devices and determining whether the estimated signal-to-noise ratio is below a prescribed minimum.

43. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of determining an error rate of the communication signal transmitted and received by the one of the plurality of mobile devices and determining whether the error rate exceeds a prescribed maximum.

44. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of determining a vector of movement of the one of the plurality of mobile devices and extrapolating an expected location of the one of the plurality of mobile devices and comparing the extrapolated location of the mobile device to a database of known troublesome locations.

45. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of implementing a more robust error detection and correction coding scheme for the communication signal transmitted from and received by the one of the plurality of mobile devices.

46. The processor executable instructions of claim 45 further configured to cause a processor to perform the steps of implementing a more interleaving scheme for the communication signal transmitted from and received by the one of the plurality of mobile devices.

47. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of implementing any of a combination of reduced data rate, more robust error detection and correction coding scheme, and more robust interleaving scheme for the communication signal transmitted from and received by the one of the plurality of mobile devices.

48. The processor executable instructions of claim 40 further configured to cause a processor to perform the steps of

determining whether the active connection between one of the plurality of mobile devices and wireless network is no longer troublesome;

increasing the data transmission rate when the active connection is no longer troublesome.

49. A method for conserving battery power in a mobile device, comprising:

determining whether the power level of the battery in the mobile device has decreased below a pre-set minimum level; and

reducing a rate at which data is transmitted over an active connection between the mobile device and a wireless network when the power level of the battery in the mobile device has decreased below the pre-set minimum level.

50. The method of claim 49, further comprising:

determining whether the power level of the battery in the mobile device is no longer below a pre-set minimum level; and

increasing the data transmission rate when the power level of the battery in the mobile device is no longer below a pre-set minimum level.

51. A mobile device comprising:

a processor; and

a memory unit coupled to the processor, wherein the memory contains processor readable software instructions to;

determine whether the power level of the battery in the mobile device has decreased below a pre-set minimum level;

reducing a rate at which data is transmitted over an active connection between the mobile device and a wireless network when the power level of the battery in the mobile device has decreased below the pre-set minimum level;

and

a transmitter for transmitting the reduced data rate criteria to a base station receiver.

52. The mobile device of claim 51, further wherein the memory contains processor readable software instructions to

determine whether the power level of the battery in the mobile device is no longer below a pre-set minimum level;

and

increase the data transmission rate when the power level of the battery in the mobile device is no longer below a pre-set minimum level.

53. A processor readable storage medium having stored thereon processor executable instructions configured to cause a processor to perform steps comprising:

determining whether the power level of the battery in the mobile device has decreased below a pre-set minimum level; and

reducing a rate at which data is transmitted over an active connection between the mobile device and a wireless network when the power level of the battery in the mobile device has decreased below the pre-set minimum level.

54. The processor executable instructions of claim 53 further configured to cause a processor to perform the steps of:

determining whether the power level of the battery in the mobile device is no longer below a pre-set minimum level; and

increasing the data transmission rate when the power level of the battery in the mobile device is no longer below a pre-set minimum level.