Method of Handling Radio link Failure Detection in a Wireless Communication System and Related Communication Device

• US 20100240357A1
• Filed: 01/21/2010
• Published: 09/23/2010
• Est. Priority Date: 03/22/2009
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Wu, Chih-Hsiang
• Granted Patent: US 8,700,029 B2
• Time in Patent Office: Days
• US Class Current: 455/424
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

A method of handling radio link failure detection for a communication device of a wireless communication system includes performing radio problem detection for a plurality of targets of interest, and managing at least a timer for detecting radio link failure of the plurality of targets of interest.

Claims

1. A method of handling radio link failure detection for a communication device of a wireless communication system, the method comprising:

performing radio problem detection for a plurality of targets of interest; and

starting a timer for detecting radio link failure of the plurality of targets of interest when radio problems are detected on the plurality of targets of interest.

2. The method of claim 1, wherein performing the radio problem detection for the plurality of targets of interest comprises generating a plurality of consecutive out-of-synchronization indications when the radio problems are detected on the plurality of targets of interest.

3. The method of claim 2, wherein starting the timer for detecting the radio link failure of the plurality of targets of interest when radio problems are detected on the plurality of targets of interest comprises starting the timer for detecting the radio link failure of the plurality of targets of interest according to the plurality of consecutive out-of-synchronization indications.

4. The method of claim 1 further comprising determining the radio link failure of the plurality of targets of interest to be detected when the timer expires.

5. The method of claim 4 further comprising performing a radio resource control (RRC) connection re-establishment procedure for re-establishing at least a radio link of the plurality of targets of interest.

6. The method of claim 2 further comprising:

generating a plurality of consecutive in-synchronization indications when one of the radio problems is recovered; and

stopping the timer according to the plurality of consecutive in-synchronization indications.

7. The method of claim 1, wherein the targets of interest are component carriers or cells.

8. A method of handling radio link failure detection for a communication device of a wireless communication system, the method comprising:

performing radio problem detection for a plurality of targets of interest; and

starting a timer for detecting radio link failure of one of the plurality of targets of interest when a radio problem is detected on the target of interest.

9. The method of claim 8, wherein performing the radio problem detection for the plurality of targets of interest comprises generating a plurality of consecutive out-of-synchronization indications when the radio problem is detected on the target of interest.

10. The method of claim 9, wherein starting the timer for detecting the radio link failure of the target of interest when the radio problem is detected on the target of interest comprises starting the timer for detecting the radio link failure of the target of interest according to the plurality of consecutive out-of-synchronization indications.

11. The method of claim 8 further comprising determining the radio link failure of the target of interest to be detected when the timer expires.

12. The method of claim 11 further comprising performing a radio resource control (RRC) connection re-establishment procedure or a random access procedure for re-establishing a radio link of the target of interest.

13. The method of claim 9 further comprising:

generating a plurality of consecutive in-synchronization indications when the radio problem is recovered; and

stopping the timer according to the plurality of consecutive in-synchronization indications.

14. The method of claim 8, wherein the targets of interest are component carriers or cells.

15. A method of handling radio link failure detection for a communication device of a wireless communication system, the method comprising:

performing radio problem detection for a plurality of targets of interest;

starting a first timer for detecting radio link failure of a first target of interest of the plurality of targets of interest when a radio problem is detected on the first target of interest; and

starting a second timer for detecting radio link failure of the rest of the plurality of targets of interest when radio problems are detected on the rest of the plurality of targets of interest.

16. The method of claim 15, wherein performing the radio problem detection for the plurality of targets of interest comprises:

generating a first number of consecutive out-of-synchronization indications when the radio problem is detected on the first target of interest; and

generating a second number of consecutive out-of-synchronization indications when the radio problems are detected on the rest of the plurality of targets of interest.

17. The method of claim 16, wherein starting the first timer for detecting the radio link failure of the first target of interest of the plurality of targets of interest when the radio problem is detected on the first target of interest comprises starting the first timer according to the first number of consecutive out of synchronization indications;

and starting the second timer for detecting radio link failure of the rest of the plurality of targets of interest when radio problems are detected on the rest of the plurality of targets of interest comprises starting the second timer according to the second number of consecutive out of synchronization indications.

18. The method of claim 15 further comprising:

determining the radio link failure of the first target of interest to be detected when the first timer expires; and

determining the radio link failure of the rest of the plurality of targets of interest to be detected when the second timer expires.

19. The method of claim 18 further comprising performing a radio resource control (RRC) connection re-establishment procedure or a random access procedure for re-establishing a radio link of the first target of interest or for re-establishing at least a radio link of the rest of the targets of interest.

20. The method of claim 16 further comprising:

generating a third number of consecutive in-synchronization indications when the radio problem of the first target of interest is recovered before the first timer expires;

generating a fourth number of consecutive in-synchronization indications when one of the radio problems of the rest of the targets of interest is recovered before the second timer expires;

stopping the first timer according to the first number of consecutive in-synchronization indications; and

stopping the second timer according to the second number of consecutive in-synchronization indications.

21. The method of claim 15, wherein the targets of interest are component carriers or cells.

22. A communication device of accurately handling radio link failure detection for a wireless communication system, the communication device comprising:

a detecting unit for performing radio problem detection for a plurality of targets of interest and generating an indication signal when radio problems are detected on the plurality of targets of interest; and

a management unit, coupled to the detecting unit, for starting a timer for detecting radio link failure of the plurality of targets of interest according to the indication signal.

23. The communication device of claim 22, wherein the indication signal comprises a plurality of consecutive out-of-synchronization indications.

24. The communication device of claim 22, wherein the management unit determines the radio link failure of the plurality of targets of interest to be detected when the timer expires, and generates a control signal.

25. The communication device of claim 24 further comprising a radio link establishment unit for performing a radio resource control (RRC) connection re-establishment procedure for re-establishing at least a radio link of the plurality of targets of interest according to the control signal.

26. The communication device of claim 23, wherein the detecting unit further generates a plurality of consecutive in-synchronization indications when one of the radio problems detected on the plurality of targets of interest is recovered.

27. The communication device of claim 26, wherein the management unit stops the timer according to the plurality of consecutive in-synchronization indications.

28. The communication device of claim 22, wherein the targets of interest are component carriers or cells.

29. A communication device of accurately handling radio link failure detection for a wireless communication system, the communication device comprising:

a plurality detecting unit for performing radio problem detection for a plurality of targets of interest and generating an indication signal when a radio problem is detected on one of the plurality of targets of interest; and

a plurality of management units corresponding to the plurality of targets of interest, for managing timers for detecting radio link failure of the plurality of targets of interest;

wherein a first management unit corresponding to the target of interest having the radio problem starts a timer according to the indication signal.

30. The communication device of claim 29, wherein the indication signal comprises a plurality of consecutive out-of-synchronization indications.

31. The communication device of claim 29, wherein the first management unit determines the radio link failure of the target of interest to be detected when the timer expires, and generates a control signal.

32. The communication device of claim 31 further comprising a radio link establishment unit for performing a radio resource control (RRC) connection re-establishment procedure or a random access procedure for re-establishing a radio link of the target of interest according to the control signal.

33. The communication device of claim 30, wherein the detecting unit further generates a plurality of consecutive in-synchronization indications when the radio problem detected on the target of interest is.

34. The communication device of claim 33, wherein the first management unit stops the timer according to the plurality of consecutive in-synchronization indications.

35. The communication device of claim 29, wherein the targets of interest are component carriers or cells.

36. A communication device of accurately handling radio link failure detection for a wireless communication system, the communication device comprising:

a detecting unit for performing radio problem detection for a plurality of targets of interest, generating a first indication signal when a radio problem of the first target of interest is detected, and generating a second indication signal when radio problems of the rest of the plurality of targets of interest are detected;

a first management unit for starting a first timer for detecting radio link failure of the first target of interest according to the first indication signal; and

a second management unit for starting a second timer for detecting radio link failure of the rest of the plurality of targets of interest according to the second indication signal.

37. The communication device of claim 36, wherein the first indication signal comprises a first number of consecutive out-of-synchronization indications, and the second indication signal comprises a second number of consecutive out-of-synchronization indications.

38. The communication device of claim 36, wherein the first management unit determines the radio link failure of the first target of interest to be detected when the first timer expires, and generates a first control signal, and the second management unit determines the radio link failure of the rest of the plurality targets of interest to be detected when the second timer expires, and generates a second control signal.

39. The communication device of claim 38 further comprising a radio link establishment unit for performing a radio resource control (RRC) connection re-establishment procedure or a random access procedure for re-establishing a radio link of the first target of interest according to the first control signal, or for re-establishing at least a radio link of the rest of the targets of interest according to the second control signal when access stratum (AS) security is activated.

40. The communication device of claim 37, wherein the detecting unit further generates a third number of consecutive in-synchronization indications when the radio problem detected on the first target of interest is recovered before the first timer expires, and generates a fourth number of consecutive in-synchronization indications when one of the radio problems detected on the rest of the plurality of targets of interest is recovered before the second timer expires.

41. The communication device of claim 40, wherein the first management unit stops the first timer according to the third number of consecutive in-synchronization indications, and the second management unit stops the second timer according to the fourth number of consecutive in-synchronization indications.

42. The method of claim 36, wherein the targets of interest are component carriers or cells.

43. A communication device of accurately handling radio link failure detection for a wireless communication system, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process; and

a processor coupled to the computer readable recording medium, for processing the program code to execute the process;

wherein the process comprises;

performing radio problem detection for a plurality of targets of interest; and

starting a timer for detecting radio link failure of the plurality of targets of interest when radio problems are detected on the plurality of targets of interest.

44. The communication device of claim 43, wherein performing the radio problem detection for the plurality of targets of interest comprises generating a plurality of consecutive out-of-synchronization indications when the radio problems are detected on the plurality of targets of interest.

45. The communication device of claim 44, wherein starting the timer for detecting the radio link failure of the plurality of targets of interest when the radio problems are detected on the plurality of targets of interest comprises starting the timer according to the plurality of consecutive out-of-synchronization indications.

46. The communication device of claim 43, wherein the process further comprises determining the radio link failure of the plurality of targets of interest to be detected when the timer expires.

47. The communication device of claim 46, wherein the process further comprises performing a radio resource control (RRC) connection re-establishment procedure for re-establishing at least a radio link of the plurality of targets of interest.

48. The communication device of claim 44 further comprising:

generating a plurality of consecutive in-synchronization indications when one of the radio problems is recovered; and

stopping the timer according to the plurality of consecutive in-synchronization indications.

49. The method of claim 43, wherein the targets of interest are component carriers or cells.

50. A communication device of accurately handling radio link failure detection for a wireless communication system, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process; and

a processor coupled to the computer readable recording medium, for processing the program code to execute the process;

wherein the process comprises;

performing radio problem detection for a plurality of targets of interest; and

starting a timer for detecting radio link failure of one of the plurality of targets of interest when a radio problem is detected on the target of interest.

51. The communication device of claim 50, wherein performing the radio problem detection for the plurality of targets of interest comprises generating a plurality of consecutive out-of-synchronization indications when the radio problem is detected on the target of interest.

52. The communication device of claim 51, wherein starting the timer for detecting the radio link failure of the target of interest when the radio problem is detected on the target of interest comprises starting the timer according to the plurality of consecutive out-of-synchronization indications.

53. The communication device of claim 50, wherein the process further comprises determining the radio link failure of the target of interest to be detected when the timer expires.

54. The communication device of claim 53, wherein the process further comprises performing a radio resource control (RRC) connection re-establishment procedure or a random access procedure for re-establishing a radio link of the target of interest.

55. The communication device of claim 51 further comprising:

generating a plurality of consecutive in-synchronization indications when the radio problem is recovered; and

stopping the timer according to the plurality of consecutive in-synchronization indications.

56. The method of claim 50, wherein the targets of interest are component carriers or cells.

57. A communication device of accurately handling radio link failure detection for a wireless communication system, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process; and

a processor coupled to the computer readable recording medium, for processing the program code to execute the process;

wherein the process comprises;

performing radio problem detection for a plurality of targets of interest;

starting a first timer for detecting radio link failure of a first target of interest of the plurality of targets of interest when a radio problem is detected on the first target of interest; and

starting a second timer for detecting radio link failure of the rest of the plurality of targets of interest when radio problems are detected on the rest of the plurality of the targets of interest.

58. The communication device of claim 57, wherein performing the radio problem detection for the plurality of targets of interest comprises generating a first number of consecutive out-of-synchronization indications when the radio problem is detected on the first target of interest;

and generating a second number of consecutive out-of-synchronization indications when the radio problems are detected on the rest of the plurality of targets of interest.

59. The communication device of claim 58, wherein starting the first timer for detecting the radio link failure of the first target of interest of the plurality of targets of interest when the radio problem is detected on the first target of interest comprises starting the first timer according to the first number of consecutive out-of-synchronization indications;

and starting the second timer for detecting the radio link failure of the rest of the plurality of targets of interest when the radio problems are detected on the rest of the plurality of targets of interest comprises starting the second timer according to the second number of consecutive out of synchronization indications.

60. The communication device of claim 57, wherein the process further comprises determining the radio link failure of the first target of interest to be detected when the first timers expires, and determining the radio link failure of the rest of the plurality of targets of interest to be detected when the second timers expires.

61. The communication device of claim 60, wherein the process further comprises performing a radio resource control (RRC) connection re-establishment procedure or a random access procedure for re-establishing a radio link of the first target of interest or for re-establishing at least a radio link of the rest of the targets of interest.

62. The communication device of claim 58 further comprising:

generating a third number of consecutive in-synchronization indications when the radio problem is recovered before the first timer expires;

generating a fourth number of consecutive in-synchronization indications when one of the radio problems is recovered before the second timer expires;

stopping the first timer according to the third number of consecutive in-synchronization indications; and

stopping the second timer according to the fourth number of consecutive in-synchronization indications.

63. The method of claim 57, wherein the targets of interest are component carriers or cells.