Methods and apparatus for service acquisition in a multi-frequency network

• US 8,842,612 B2
• Filed: 06/18/2008
• Issued: 09/23/2014
• Est. Priority Date: 06/20/2007
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Gupta, Binita, Li, Linbo, Krishnamoorthi, Raghuraman, Mantravadi, Ashok
• Primary Examiner(s): Pezzlo, John
• Application Number:
  US12/141,840
• Publication Number:
  US 20090029705A1
• Time in Patent Office: 2,288 Days
• Field of Search: 370/252, 370/329, 370/331, 370/430
• US Class Current: 370/329
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service

Abstract

Methods and apparatus for service acquisition in a multi-frequency network. In an aspect, a method is provided for service acquisition in a multi-frequency network. The method includes detecting a service acquisition trigger event and identifying a selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network. The method also includes acquiring a wide system on the selected RF channel, removing the selected RF channel from the acquisition RF list if the wide system can not be acquired on the selected RF channel, and repeating said operations of identifying, acquiring and removing until the wide system is acquired on the selected RF channel or a system acquisition timeout occurs.

Claims

1. A method for service acquisition in a multi-frequency network, the method comprising:

detecting a service acquisition trigger event;

identifying a single selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network;

attempting to acquire a wide system on the single selected RF channel;

removing the single selected RF channel from the acquisition RF list if the wide system cannot be acquired on the single selected RF channel; and

repeating said operations of identifying, attempting, and removing until the wide system is acquired on the single selected RF channel or a system acquisition timeout occurs.

2. The method of claim 1, further comprising obtaining the acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

3. The method of claim 1, wherein said detecting comprises detecting the service acquisition trigger event based on at least one of:

a power-up condition;

detection of system loss;

a content acquisition request; and

a scheduled system acquisition attempt.

4. The method of claim 1, further comprising monitoring the RF channels in the acquisition RF list to measure their associated signal strength.

5. The method of claim 1, wherein said identifying comprises identifying the single selected RF channel to be an RF channel in the acquisition RF list having the strongest signal strength above a signal detection threshold.

6. The method of claim 1, wherein said repeating comprises repeating said operations of identifying, attempting, and removing for RF channels in the acquisition RF list for which signal strength is above a signal detection threshold.

7. The method of claim 1, further comprising acquiring a wide control channel on the single selected RF channel if the wide system is acquired.

8. The method of claim 7, further comprising acquiring the wide control channel based on a wide control channel acquisition retry schedule if the wide control channel is not acquired in a first acquisition attempt.

9. The method of claim 1, further comprising:

attempting to acquire a local system on the single selected RF channel; and

acquiring a local control channel on the single selected RF channel if the local system is acquired.

10. The method of claim 9, further comprising acquiring the local control channel based on a local control channel acquisition retry schedule if the local control channel is not acquired in a first acquisition attempt.

11. The method of claim 9, further comprising initiating a local system acquisition procedure if the local system is not acquired.

12. The method of claim 11, wherein said initiating comprises initiating the local system acquisition procedure to acquire the local system on the single selected RF channel based on a local system acquisition retry schedule.

13. The method of claim 12, wherein said initiating comprises setting the local system acquisition retry schedule to include an exponential back-off phase followed by a periodic reattempt phase.

14. The method of claim 11, wherein said initiating the local system acquisition procedure comprises:

identifying a local selected RF channel to be a last best RF channel from the local acquisition RF list if signal strength for the last best RF channel is above a local signal detection threshold;

identifying a local selected RF channel to be an RF channel from the local acquisition RF list with the strongest signal strength if signal strength of the last best RF channel is equal to or below the local signal detection threshold;

attempting to acquire the local system on the local selected RF channel;

removing the local selected RF channel from local acquisition RF list if the local system is not acquired on the local selected RF channel; and

repeating said operations of identifying the local selected RF channel, attempting to acquire the local system, and removing the local selected RF channel, until the local system is acquired on the local selected RF channel or a local system acquisition timeout occurs.

15. The method of claim 14, further comprising obtaining the local acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

16. The method of claim 14, further comprising monitoring the RF channels in the local acquisition RF list to measure their associated signal strength.

17. The method of claim 14, further comprising determining the last best RF to be an RF channel where the wide system was last acquired.

18. The method of claim 14, further comprising initiating a local system acquisition outer loop if the local system is not acquired.

19. The method of claim 18, further comprising attempting to acquire the local system based on a pre-determined local outer loop schedule as part of the local system acquisition outer loop.

20. The method of claim 1, further comprising initiating a system acquisition outer loop if the wide system is not acquired.

21. The method of claim 20, further comprising attempting to acquire the wide system based on a pre-determined outer loop schedule as part of the system acquisition outer loop.

22. An apparatus for service acquisition in a multi-frequency network, the apparatus comprising:

a processor configured with processor-executable instructions to perform operations comprising;

detecting a service acquisition trigger event;

identifying a single selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network;

attempting to acquire a wide system on the single selected RF channel;

removing the single selected RF channel from the acquisition RF list if the wide system can not be acquired on the single selected RF channel; and

repeating said operations of identifying, attempting, acquiring and removing until the wide system is acquired on the single selected RF channel or a system acquisition timeout occurs.

23. The apparatus of claim 22, wherein the processor is configured with processor-executable instructions to perform operations further comprising obtaining the acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

24. The apparatus of claim 22, wherein the processor is configured with processor-executable instructions to perform operations further comprising detecting the service acquisition trigger event based on at least one of:

a power-up condition;

detection of system loss;

a content acquisition request; and

a scheduled system acquisition attempt.

25. The apparatus of claim 22, wherein the processor is configured with processor-executable instructions to perform operations further comprising repeating said operations of identifying, attempting, and removing for RF channels in the acquisition RF list for which signal strength is above a signal detection threshold.

26. The apparatus of claim 22, wherein said processing logic the processor is configured with processor-executable instructions to perform operations further comprising:

attempting to acquire a local system on the single selected RF channel; and

acquiring a local control channel on the single selected RF channel if the local system is acquired.

27. The apparatus of claim 22, wherein the processor is configured with processor-executable instructions to perform operations further comprising initiating a local system acquisition procedure if the local system is not acquired.

28. The apparatus of claim 22, wherein the processor is configured with processor-executable instructions to perform operations further comprising initiating the local system acquisition procedure to acquire the local system on the single selected RF channel based on a local system acquisition retry schedule.

29. The apparatus of claim 27, wherein the processor is configured with processor-executable instructions to perform operations further comprising:

identifying a local selected RF channel to be a last best RF channel from the local acquisition RF list if signal strength for the last best RF channel is above a local signal detection threshold;

identifying a local selected RF channel to be an RF channel from the local acquisition RF list with the strongest signal strength if signal strength of the last best RF channel is equal to or below the local signal detection threshold;

attempting to acquire the local system on the local selected RF channel;

removing the local selected RF channel from local acquisition RF list if the local system is not acquired on the local selected RF channel; and

repeating said operations of identifying the local selected RF channel, attempting to acquire acquiring the local system, and removing the local selected RF channel, until the local system is acquired on the local selected RF channel or a local system acquisition timeout occurs.

30. The apparatus of claim 29, wherein the processor is configured with processor-executable instructions to perform operations further comprising obtaining the local acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

31. The apparatus of claim 29, wherein the processor is configured with processor-executable instructions to perform operations further comprising initiating a local system acquisition outer loop if the local system is not acquired.

32. The apparatus of claim 22, wherein the processor is configured with processor-executable instructions to perform operations further comprising initiating a system acquisition outer loop if the wide system is not acquired.

33. An apparatus for service acquisition in a multi-frequency network, the apparatus comprising:

means for detecting a service acquisition trigger event;

means for identifying a single selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network;

means for attempting to acquire a wide system on the single selected RF channel;

means for removing the single selected RF channel from the acquisition RF list if the wide system can not be acquired on the single selected RF channel; and

means for repeating said operations of identifying, attempting, and removing until the wide system is acquired on the single selected RF channel or a system acquisition timeout occurs.

34. The apparatus of claim 33, further comprising means for obtaining the acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

35. The apparatus of claim 33, wherein said means for detecting comprises means for detecting the service acquisition trigger event based on at least one of:

a power-up condition;

detection of system loss;

a content acquisition request; and

a scheduled system acquisition attempt.

36. The apparatus of claim 33, wherein said means for repeating comprises means for repeating said operations of identifying, attempting, and removing for RF channels in the acquisition RF list for which signal strength is above a signal detection threshold.

37. The apparatus of claim 33, further comprising:

means for attempting to acquire a local system on the single selected RF channel; and

means for acquiring a local control channel on the single selected RF channel if the local system is acquired.

38. The apparatus of claim 37, further comprising means for initiating a local system acquisition procedure if the local system is not acquired.

39. The apparatus of claim 38, wherein said means for initiating comprises means for initiating the local system acquisition procedure to acquire the local system on the single selected RF channel based on a local system acquisition retry schedule.

40. The apparatus of claim 38, wherein said means for initiating the local system acquisition procedure comprises:

means for identifying a local selected RF channel to be a last best RF channel from the local acquisition RF list if signal strength for the last best RF channel is above a local signal detection threshold;

means for identifying a local selected RF channel to be an RF channel from the local acquisition RF list with the strongest signal strength if signal strength of the last best RF channel is equal to or below the local signal detection threshold;

means for attempting to acquire the local system on the local selected RF channel;

means for removing the local selected RF channel from local acquisition RF list if the local system is not acquired on the local selected RF channel; and

means for repeating said operations of identifying the local selected RF channel, attempting to acquire the local system, and removing the local selected RF channel until the local system is acquired on the local selected RF channel or a local system acquisition timeout occurs.

41. The apparatus of claim 40, further comprising means for obtaining the local acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

42. The apparatus of claim 40, further comprising means for initiating a local system acquisition outer loop if the local system is not acquired.

43. The apparatus of claim 33, further comprising means for initiating a system acquisition outer loop if the wide system is not acquired.

44. A non-transitory processor-readable storage medium having stored thereon processor-executable instructions configured to cause a processor to perform operations comprising:

detecting a service acquisition trigger event;

identifying a single selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of a multi-frequency network;

attempting to acquire a wide system on the single selected RF channel;

removing the single selected RF channel from the acquisition RF list if the wide system can not be acquired on the single selected RF channel; and

repeating said operations of identifying, attempting, and removing until the wide system is acquired on the single selected RF channel or a system acquisition timeout occurs.

45. The non-transitory processor-readable storage medium of claim 44, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising obtaining the acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

46. The non-transitory processor-readable storage medium of claim 44, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising detecting the service acquisition trigger event based on at least one of:

a power-up condition;

detection of system loss;

a content acquisition request; and

a scheduled system acquisition attempt.

47. The non-transitory processor-readable storage medium of claim 44, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising repeating said operations of identifying, attempting, and removing for RF channels in the acquisition RF list for which signal strength is above a signal detection threshold.

48. The non-transitory processor-readable storage medium of claim 44, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising:

attempting to acquire a local system on the single selected RF channel; and

acquiring a local control channel on the single selected RF channel if the local system is acquired.

49. The non-transitory processor-readable storage medium of claim 48, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising initiating a local system acquisition procedure if the local system is not acquired.

50. The non-transitory processor-readable storage medium of claim 49, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising initiating the local system acquisition procedure to acquire the local system on the single selected RF channel based on a local system acquisition retry schedule.

51. The non-transitory processor-readable storage medium of claim 49, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising:

identifying a local selected RF channel to be a last best RF channel from the local acquisition RF list if signal strength for the last best RF channel is above a local signal detection threshold;

identifying a local selected RF channel to be an RF channel from the local acquisition RF list with the strongest signal strength if signal strength of the last best RF channel is equal to or below the local signal detection threshold;

attempting to acquire the local system on the local selected RF channel;

removing the local selected RF channel from local acquisition RF list if the local system is not acquired on the local selected RF channel; and

repeating said operations of identifying the local selected RF channel, attempting to acquiring the local system, and removing the local selected RF channel until the local system is acquired on the local selected RF channel or a local system acquisition timeout occurs.

52. The non-transitory processor-readable storage medium of claim 51, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising obtaining the local acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

53. The non-transitory processor-readable storage medium of claim 51, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising initiating a local system acquisition outer loop if the local system is not acquired.

54. T he non-transitory processor-readable storage medium of claim 44, wherein the storage medium has stored thereon processor-executable instructions configured to cause a processor to perform operations further comprising initiating a system acquisition outer loop if the wide system is not acquired.

55. An integrated circuit configured for service acquisition in a multi-frequency network, the integrated circuit comprising:

a first module configured to detect a service acquisition trigger event;

a second module configured to identify a single selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network;

a third module configured to attempt to acquire a wide system on the single selected RF channel;

a fourth module configured to remove the single selected RF channel from the acquisition RF list if the wide system can not be acquired on the single selected RF channel; and

a fifth module configured to repeat said operations of identifying, attempting, and removing until the wide system is acquired on the single selected RF channel or a system acquisition timeout occurs.

56. The integrated circuit of claim 55, further comprising a sixth module configured to obtain the acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

57. The integrated circuit of claim 55, wherein said first module is configured to detect the service acquisition trigger event based on at least one of:

a power-up condition;

detection of system loss;

a content acquisition request; and

a scheduled system acquisition attempt.

58. The integrated circuit of claim 55, wherein said fifth module is configured to repeat said operations of identifying, attempting, and removing for RF channels in the acquisition RF list for which signal strength is above a signal detection threshold.

59. The integrated circuit of claim 55, further comprising:

a sixth module configured to attempt to acquire a local system on the single selected RF channel; and

a seventh module configured to acquire a local control channel on the single selected RF channel if the local system is acquired.

60. The integrated circuit of claim 59, further comprising an eighth module configured to initiate a local system acquisition procedure if the local system is not acquired.

61. The integrated circuit of claim 60, wherein said eighth module is configured to initiate the local system acquisition procedure to acquire the local system on the single selected RF channel based on a local system acquisition retry schedule.

62. The integrated circuit of claim 60, wherein said eighth module is configured to:

identify a local selected RF channel to be a last best RF channel from the local acquisition RF list if signal strength for the last best RF channel is above a local signal detection threshold;

identify a local selected RF channel to be an RF channel from the local acquisition RF list with the strongest signal strength if signal strength of the last best RF channel is equal to or below the local signal detection threshold;

attempt to acquire the local system on the local selected RF channel;

remove the local selected RF channel from local acquisition RF list if the local system is not acquired on the local selected RF channel; and

repeat said operations of identifying the local selected RF channel, attempting to acquire the local system, and removing the local selected RF channel until the local system is acquired on the local selected RF channel or a local system acquisition timeout occurs.

63. The integrated circuit of claim 62, further comprising a ninth module configured to obtain the local acquisition RF list from at least one of a pre-provisioned RF list and a neighbor RF list determined from neighbor description information.

64. The integrated circuit of claim 62, further comprising a ninth module configured to initiate a local system acquisition outer loop if the local system is not acquired.

65. The integrated circuit of claim 55, further comprising a sixth module configured to initiate a system acquisition outer loop if the wide system is not acquired.