Communicating control messages for point-to-multipoint service in wireless communication system

• US 20060067361A1
• Filed: 08/11/2005
• Published: 03/30/2006
• Est. Priority Date: 08/12/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Chun, Sung-Duck
• Granted Patent: US 7,821,979 B2
• Time in Patent Office: Days
• US Class Current: 370/466
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A method for controlling a user equipment (UE) capable of receiving a point-to-multipoint service in a wireless communication system comprises subscribing to the point-to-multipoint service. The method also comprises receiving modified point-to-multipoint control information during a certain period from the network, wherein point-to-multipoint control information is separated into at least modified point-to-multipoint control information and unmodified point-to-multipoint control information in a network. The method also comprises determining whether the modified point-to-multipoint control information comprises information associated with the point-to-multipoint service to enable reception of the point-to-multipoint service.

Claims

1. A method for controlling a user equipment (UE) capable of receiving a point-to-multipoint service in a wireless communication system, the method comprising:

subscribing to the point-to-multipoint service;

receiving modified point-to-multipoint control information during a certain period from the network, wherein point-to-multipoint control information is separated into at least modified point-to-multipoint control information and unmodified point-to-multipoint control information in a network; and

determining whether the modified point-to-multipoint control information comprises information associated with the point-to-multipoint service to enable reception of the point-to-multipoint service.

2. The method of claim 1, wherein the certain period comprises a multiple of sub-periods.

3. The method of claim 2, wherein the certain period is a modification period.

4. The method of claim 2, wherein the sub-periods are repetition periods.

5. The method of claim 1, wherein the modified point-to-multipoint control information comprises a change indicator and updated control information associated with the change indicator.

6. The method of claim 5, wherein the change indicator comprises a list of point-to-multipoint services that are modified in the certain period.

7. The method of claim 6, wherein the unmodified point-to-multipoint control information comprises a non-change indicator and non-updated control information associated with the non-change indicator.

8. The method of claim 7, wherein the non-change indicator comprises a list of point-to-multipoint services that are unmodified in the certain period.

9. The method of claim 8, further comprising determining whether the point-to-multipoint control information was properly received in a previous certain period.

10. The method of claim 9, further comprising determining whether to receive the updated control information in the certain period based on the change indicator if the point-to-multipoint control information was properly received in the previous certain period.

11. The method of claim 9, further comprising determining whether to receive the updated control information and the non-updated control information in the certain period based on the change indicator and the non-change indicator if the point-to-multipoint control information was not properly received in the previous certain period.

12. The method of claim 1, further comprising:

receiving the unmodified point-to-multipoint control information during the certain period from the network.

13. The method of claim 12, further comprising determining whether the unmodified point-to-multipoint control information comprises the information associated with the point-to-multipoint service to enable reception of the point-to-multipoint service.

14. The method of claim 1, wherein the modified point-to-multipoint control information comprises point-to-multipoint service information.

15. The method of claim 1, wherein the unmodified point-to-multipoint control information comprises point-to-multipoint service information.

16. The method of claim 1, further comprising receiving the modified point-to-multipoint control information again during the certain period if the modified point-to-multipoint control information is not properly received.

17. The method of claim 12, further comprising receiving the unmodified point-to-multipoint control information again during the certain period if the unmodified point-to-multipoint control information is not properly received.

18. The method of claim 1, wherein the modified point-to-multipoint control information is received periodically during the certain period.

19. The method of claim 4, wherein the modified point-to-multipoint control information is received once during each of the repetition periods.

20. The method of claim 1, wherein the modified point-to-multipoint control information does not change during the certain period.

21. The method of claim 12, wherein the unmodified point-to-multipoint control information is received periodically during the certain period.

22. The method of claim 1, wherein the network is a UTMS terrestrial radio network (UTRAN).

23. The method of claim 1, further comprising:

establishing a point-to-multipoint service connection between the UE and the network.

24. A method in a network for controlling a user equipment (UE) capable of receiving a point-to-multipoint service in a wireless communication system, the method comprising:

separating point-to-multipoint control information into at least modified point-to-multipoint control information and unmodified point-to-multipoint control information; and

transmitting the modified point-to-multipoint control information to the UE periodically during a certain period.

25. The method of claim 24, wherein the modified point-to-multipoint control information comprises a change indicator and updated control information associated with the change indicator.

26. The method of claim 24, further comprising:

transmitting the unmodified point-to-multipoint control information to the UE during the certain period.

27. The method of claim 24, wherein the certain period comprises a multiple of sub-periods.

28. The method of claim 27, wherein the certain period is a modification period.

29. The method of claim 27, wherein the sub-periods are repetition periods.

30. The method of claim 25, wherein the change indicator comprises a list of point-to-multipoint services that are modified in the certain period.

31. The method of claim 24, wherein the unmodified point-to-multipoint control information comprises a non-change indicator and non-updated control information associated with the non-change indicator.

32. The method of claim 31, wherein the non-change indicator comprises a list of point-to-multipoint services that are unmodified in the certain period.

33. A user equipment (UE) capable of receiving a point-to-multipoint service in a wireless communication system, the user equipment comprising:

means for subscribing to the point-to-multipoint service;

means for receiving modified point-to-multipoint control information during a certain period from the network, wherein point-to-multipoint control information is separated into at least modified point-to-multipoint control information and unmodified point-to-multipoint control information in a network; and

means for determining whether the modified point-to-multipoint control information comprises information associated with the point-to-multipoint service to enable reception of the point-to-multipoint service.

34. The user equipment of claim 33, wherein the modified point-to-multipoint control information comprises a change indicator and updated control information associated with the change indicator.

35. The user equipment of claim 33, further comprising:

means for receiving the unmodified point-to-multipoint control information during the certain period from the network.

36. A network for controlling a user equipment (UE) capable of receiving a point-to-multipoint service in a wireless communication system, the network comprising:

means for separating point-to-multipoint control information into at least modified point-to-multipoint control information and unmodified point-to-multipoint control information; and

means for transmitting the modified point-to-multipoint control information to the UE periodically during a certain period.

37. The network of claim 36, wherein the modified point-to-multipoint control information comprises a change indicator and updated control information associated with the change indicator.

38. The network of claim 36, further comprising:

means for transmitting the unmodified point-to-multipoint control information to the UE during the certain period.