Methods and Apparatus for Service Acquisition in a Broadcast System

• US 20080268787A1
• Filed: 04/22/2008
• Published: 10/30/2008
• Est. Priority Date: 04/25/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chen, An Mei, Gao, Ying, Gholmieh, Ralph Akram, Balraj, Sajith, DeVico, Michael
• Granted Patent: US 8,331,969 B2
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H04H 60/32 Arrangements for monitoring conditions of receiving stations, e.g. malfunction or breakdown of receiving stations
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods and apparatus for service acquisition in a broadcast system. In an aspect, a method includes detecting whether a loss of service has occurred, and initiating acquisition attempts during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed. An apparatus includes interface logic configured to detect whether a loss of service has occurred, and processing logic configured to initiate acquisition attempts during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

Claims

1. A method for service acquisition in a broadcast system, the method comprising:

detecting whether a loss of service has occurred; and

initiating at least one acquisition attempt during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

2. The method of claim 1, wherein said initiating comprises initiating a first acquisition attempt having a first duration and subsequent acquisition attempts having durations equal to or shorter than the first duration.

3. The method of claim 1, further comprising initiating an extended acquisition phase after the aggressive acquisition phase, wherein fixed or variable time intervals are provided between additional acquisition attempts, and wherein the additional acquisition attempts have fixed or varying durations.

4. The method of claim 3, further comprising determining the durations and the time intervals between the additional acquisition attempts to achieve a selected power utilization.

5. The method of claim 3, further comprising determining the aggressive acquisition phase and the extended acquisition phase so that an average time interval between acquisition attempts in the aggressive acquisition phase is less than an average time interval between acquisition attempts in the extended acquisition phase.

6. The method of claim 3, further comprising determining the aggressive acquisition phase and the extended acquisition phase so that an average power utilization in the aggressive acquisition phase is more than an average power utilization in the extended acquisition phase.

7. The method of claim 3, further comprising determining the extended acquisition phase so that an average power utilization in the extended acquisition phase meets a selected target.

8. The method of claim 7, wherein the selected target is equal to an average power utilization in standby mode when in-service.

9. The methods of claims 1, further comprising providing a status indicator selected from one of loss of system, acquiring system, and system acquired.

10. The method of claim 1, further comprising re-establishing at least one flow download if service is acquired in the aggressive acquisition phase.

11. The method of claim 1, further comprising ending at least one flow download if service is not acquired by the end of the aggressive acquisition phase.

12. An apparatus for service acquisition in a broadcast system, the apparatus comprising:

interface logic configured to detect whether a loss of service has occurred; and

processing logic configured to initiate at least one acquisition attempt during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

13. The apparatus of claim 12, wherein said processing logic is configured to initiate a first acquisition attempt having a first duration and subsequent acquisition attempts having durations equal to or shorter than the first duration.

14. The apparatus of claim 12, wherein said processing logic is configured to initiate an extended acquisition phase after the aggressive acquisition phase, wherein fixed or variable time intervals are provided between additional acquisition attempts, and wherein the additional acquisition attempts have fixed or varying durations.

15. The apparatus of claim 14, wherein said processing logic is configured to determine the durations and the time intervals between the additional acquisition attempts to achieve a selected power utilization.

16. The apparatus of claim 14, wherein said processing logic is configured to determine the aggressive acquisition phase and the extended acquisition phase so that an average time interval between acquisition attempts in the aggressive acquisition phase is less than an average time interval between acquisition attempts in the extended acquisition phase.

17. The apparatus of claim 14, wherein said processing logic is configured to determine the aggressive acquisition phase and the extended acquisition phase so that an average power utilization in the aggressive acquisition phase is more than an average power utilization in the extended acquisition phase.

18. The apparatus of claim 14, wherein said processing logic is configured to determine the extended acquisition phase so that an average power utilization in the extended acquisition phase meets a selected target.

19. The apparatus of claim 18, wherein the selected target is equal to an average power utilization in standby mode when in-service.

20. The apparatus of claims 12, wherein said processing logic is configured to provide a status indicator selected from one of loss of system, acquiring system, and system acquired.

21. The apparatus of claim 12, wherein said processing logic is configured to re-establish at least one flow download if service is acquired in the aggressive acquisition phase.

22. The apparatus of claim 12, wherein said processing logic is configured to end at least one flow download if service is not acquired by the end of the aggressive acquisition phase.

23. An apparatus for service acquisition in a broadcast system, the apparatus comprising:

means for detecting whether a loss of service has occurred; and

means for initiating at least one acquisition attempt during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

24. The apparatus of claim 23, wherein said means for initiating comprises means for initiating a first acquisition attempt having a first duration and subsequent acquisition attempts having durations equal to or shorter than the first duration.

25. The apparatus of claim 23, further comprising means for initiating an extended acquisition phase after the aggressive acquisition phase, wherein fixed or variable time intervals are provided between additional acquisition attempts, and wherein the additional acquisition attempts have fixed or varying durations.

26. The apparatus of claim 25, further comprising means for determining the durations and the time intervals between the additional acquisition attempts to achieve a selected power utilization.

27. The apparatus of claim 25, further comprising means for determining the aggressive acquisition phase and the extended acquisition phase so that an average time interval between acquisition attempts in the aggressive acquisition phase is less than an average time interval between acquisition attempts in the extended acquisition phase.

28. The apparatus of claim 25, further comprising means for determining the aggressive acquisition phase and the extended acquisition phase so that an average power utilization in the aggressive acquisition phase is more than an average power utilization in the extended acquisition phase.

29. The apparatus of claim 25, further comprising means for determining the extended acquisition phase so that an average power utilization in the extended acquisition phase meets a selected target.

30. The apparatus of claim 29, wherein the selected target is equal to an average power utilization in standby mode when in-service.

31. The apparatus of claims 23, further comprising means for providing a status indicator selected from one of loss of system, acquiring system, and system acquired.

32. The apparatus of claim 23, further comprising means for re-establishing at least one flow download if service is acquired in the aggressive acquisition phase.

33. The apparatus of claim 23, further comprising means for ending at least one flow download if service is not acquired by the end of the aggressive acquisition phase.

34. A computer program product for service acquisition in a broadcast system, the computer program product comprising:

a machine-readable medium comprising;

a first set of codes for causing a computer to detect whether a loss of service has occurred; and

a second set of codes for causing the computer to initiate at least one acquisition attempt during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

35. The machine-readable medium of claim 34, wherein said second set of codes is configured for causing the computer to initiate a first acquisition attempt having a first duration and subsequent acquisition attempts having durations equal to or shorter than the first duration.

36. The machine-readable medium of claim 34, wherein said second set of codes is configured for causing the computer to initiate an extended acquisition phase after the aggressive acquisition phase, wherein fixed or variable time intervals are provided between additional acquisition attempts, and wherein the additional acquisition attempts have fixed or varying durations.

37. The machine-readable medium of claim 34, wherein said second set of codes is configured for causing the computer to determine the durations and the time intervals between the additional acquisition attempts to achieve a selected power utilization.

38. The machine-readable medium of claim 37, wherein said second set of codes is configured for causing the computer to determine the aggressive acquisition phase and the extended acquisition phase so that an average time interval between acquisition attempts in the aggressive acquisition phase is less than an average time interval between acquisition attempts in the extended acquisition phase.

39. The machine-readable medium of claim 37, wherein said second set of codes is configured for causing the computer to determine the aggressive acquisition phase and the extended acquisition phase so that an average power utilization in the aggressive acquisition phase is more than an average power utilization in the extended acquisition phase.

40. The machine-readable medium of claim 37, wherein said second set of codes is configured for causing the computer to determine the extended acquisition phase so that an average power utilization in the extended acquisition phase meets a selected target.

41. The machine-readable medium of claim 40, wherein the selected target is equal to an average power utilization in standby mode when in-service.

42. The machine-readable medium of claims 34, wherein said second set of codes is configured for causing the computer to provide a status indicator selected from one of loss of system, acquiring system, and system acquired.

43. The machine-readable medium of claim 34, wherein said second set of codes is configured for causing the computer to re-establish at least one flow download if service is acquired in the aggressive acquisition phase.

44. The machine-readable medium of claim 34, wherein said second set of codes is configured for causing the computer to end at least one flow download if service is not acquired by the end of the aggressive acquisition phase.

45. At least one integrated circuit configured for service acquisition in a broadcast system, the at least one integrated circuit comprising:

a first module configured to detect whether a loss of service has occurred; and

a second module configured to initiate at least one acquisition attempt during an aggressive acquisition phase if a loss of service has occurred, wherein a backoff time interval between successive acquisition attempts is constant or increased, and wherein the aggressive acquisition phase ends when service acquisition is achieved or a selected number of acquisition attempts have been performed.

46. The at least one integrated circuit of claim 45, wherein said second module is configured to initiate a first acquisition attempt having a first duration and subsequent acquisition attempts having durations equal to or shorter than the first duration.

47. The at least one integrated circuit of claim 45, wherein said second module is configured to initiate an extended acquisition phase after the aggressive acquisition phase, wherein fixed or variable time intervals are provided between additional acquisition attempts, and wherein the additional acquisition attempts have fixed or varying durations.

48. The at least one integrated circuit of claim 47, wherein said second module is configured to determine the durations and the time intervals between the additional acquisition attempts to achieve a selected power utilization.

49. The at least one integrated circuit of claim 47, wherein said second module is configured to determine the aggressive acquisition phase and the extended acquisition phase so that an average time interval between acquisition attempts in the aggressive acquisition phase is less than an average time interval between acquisition attempts in the extended acquisition phase.

50. The at least one integrated circuit of claim 47, wherein said second module is configured to determine the aggressive acquisition phase and the extended acquisition phase so that an average power utilization in the aggressive acquisition phase is more than an average power utilization in the extended acquisition phase.

51. The at least one integrated circuit of claim 47, wherein said second module is configured to determine the extended acquisition phase so that an average power utilization in the extended acquisition phase meets a selected target.

52. The at least one integrated circuit of claim 51, wherein the selected target is equal to an average power utilization in standby mode when in-service.

53. The at least one integrated circuit of claims 45, wherein said second module is configured to provide a status indicator selected from one of loss of system, acquiring system, and system acquired.

54. The at least one integrated circuit of claim 45, wherein said second module is configured to re-establish at least one flow download if service is acquired in the aggressive acquisition phase.

55. The at least one integrated circuit of claim 45, wherein said second module is configured to end at least one flow download if service is not acquired by the end of the aggressive acquisition phase.