TECHNIQUES FOR PAGING IN EXTENDED DISCONTINUOUS RECEPTION

• US 20160330791A1
• Filed: 03/22/2016
• Published: 11/10/2016
• Est. Priority Date: 05/04/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: VAJAPEYAM, Madhavan Srinivasan, GRIOT, Miguel, KITAZOE, Masato
• Granted Patent: US 10,045,394 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Aspects of the present disclosure provide techniques that may be used wireless network communication devices to support devices operating with extended discontinuous reception (eDRX). An exemplary method, performed by a BS, generally includes determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each span a number of radio frames, receiving a request to page the UE, and transmitting a paging signal to the UE in at least one subframe within a radio frame of the paging hyper-frame. Another exemplary method, performed by a UE, generally includes determining at least one paging hyper-frame for monitoring for a paging signal from a base station (BS) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each span a number of radio frames, and monitoring for the paging signal in at least one subframe within a radio frame of the paging hyper-frame.

Claims

1. A method of wireless communications by a base station (BS), comprising:

determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the at least one paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames;

receiving a request to page the UE; and

transmitting a paging signal to the UE in at least one subframe within a radio frame of the paging hyper-frame.

2. The method of claim 1, wherein the at least one paging hyper-frame is also determined based on a period for extended discontinuous reception (eDRX) of the UE.

3. The method of claim 2, wherein transmitting the paging signal in at least one subframe of paging hyper-frame comprises:

transmitting a paging signal in a plurality of radio frames of the paging hyper-frame, the plurality of radio frames determined based on the period for a legacy DRX.

4. The method of claim 3, wherein a same paging signal is transmitted in each radio frame of the plurality of radio frames.

5. The method of claim 2, wherein the at least one paging hyper-frame comprises a plurality of paging hyper-frames, each determined based on the period for eDRX.

6. The method of claim 1, further comprising:

receiving a request, from a network entity, to cancel paging of the UE after transmitting the paging signal; and

canceling transmission of additional paging signals in response to the request.

7. The method of claim 1, further comprising:

determining to update system information for a cell that supports eDRX UEs;

determining an extended broadcast control channel (BCCH) modification period for UEs in eDRX; and

updating the system information within one extended BCCH modification period of transmitting the paging signal to the UE.

8. The method of claim 7, further comprising determining an extended BCCH modification boundary that is time-aligned with a normal BCCH modification boundary.

9. The method of claim 1, wherein:

paging hyper-frames for the UE are independent of a base station on which the UE is camping, at least within a tracking area.

10. The method of claim 1, wherein:

paging hyper-frames for the UE from different BSs within a tracking area fall within a paging response window.

11. The method of claim 10, further comprising initializing a hyper-frame system frame number (H-SFN) to align with a global clock to synchronize the paging response window with other base stations in the tracking area.

12. The method of claim 1, further comprising:

indicating, via the paging signal, a change in system information has occurred.

13. The method of claim 1, wherein:

the request comprises a tag number; and

transmitting the paging signal comprises transmitting the tag number with the paging signal.

14. A method of wireless communications by a user equipment (UE), comprising:

determining at least one paging hyper-frame for monitoring for a paging signal from a base station (BS) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames; and

monitoring for the paging signal in at least one subframe within a radio frame of the paging hyper-frame.

15. The method of claim 14, wherein the paging hyper-frame is also determined based on a period for extended discontinuous reception (eDRX) of the UE.

16. The method of claim 15, wherein monitoring for the paging signal in at least one subframe of the paging hyper-frame comprises:

monitoring for the paging signal in a plurality of radio frames of the paging hyper-frame, the plurality of radio frames determined based on the period for a legacy DRX.

17. The method of claim 15, wherein the at least one paging hyper-frame comprises a plurality of paging hyper-frames, each determined based on the period for eDRX.

18. The method of claim 14, wherein:

paging hyper-frames for the UE are independent of a base station on which the UE is camping, at least within a tracking area.

19. The method of claim 14, wherein:

paging hyper-frames for the UE from different BSs within a tracking area fall within a paging response window.

20. The method of claim 14, further comprising:

deciding to cease monitoring for the paging signal in subframes of the paging hyper-frame subsequent to the at least one subframe.

21. The method of claim 20, wherein the decision is based, at least in part, on a signal quality metric.

22. The method of claim 21, wherein the signal quality metric comprises a signal to noise ratio (SNR).

23. The method of claim 20, wherein the decision is based, at least in part, on mobility of the UE.

24. The method of claim 20, wherein the decision is based on a period of time elapsed since the UE last selected to a cell.

25. The method of claim 14, further comprising:

receiving, via the paging signal, an indication that system information has changed; and

acquiring system information in response to the indication.

26. The method of claim 14, further comprising:

starting a timer; and

if the UE is not able to monitor for the paging signal before the expiration of the timer, monitoring for another paging signal in one or more radio frames that are not within the paging hyper-frame.

27. The method of claim 26, further comprising:

restarting the timer if the UE performs at least one of;

monitoring for the paging signal; and

receiving the paging signal or the other paging signal.

28. The method of claim 14, further comprising:

starting a timer; and

if the UE is not able to monitor for the paging signal before the expiration of the timer, triggering a non-access stratum (NAS) procedure.

29. The method of claim 28, further comprising:

restarting the timer if the UE completes the NAS procedure.

30. The method of claim 14, further comprising:

starting a timer; and

if the UE is not able to monitor for the paging signal before the expiration of the timer, triggering a radio resource control (RRC) procedure.

31. The method of claim 30, further comprising:

restarting the timer if the UE completes the RRC procedure.

32. The method of claim 14, further comprising:

receiving the paging signal;

starting a timer of a duration; and

refraining from monitoring for the paging signal until an expiration of the timer.

33. The method of claim 32, wherein the duration of the timer is received in at least one of:

part of an extended discontinuous reception (eDRX) configuration, and

dynamic signaling.

34. The method of claim 32, further comprising:

determining the duration of the timer based on an extended discontinuous reception (eDRX) configuration.

35. The method of claim 14, further comprising:

receiving the paging signal;

determining a tag number included in the paging signal; and

ignoring other paging signals including the same tag number.

36. A method of wireless communications by a network entity, comprising:

determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames; and

requesting one or more base stations (BSs) to page the UE differently upon occurrence of the paging hyper-frame than at other times.

37. The method of claim 36, wherein the requesting comprises paging the UE more aggressively upon occurrence of the paging hyper-frame.

38. The method of claim 36, wherein:

paging hyper-frames for the UE from different BSs within a tracking area fall within a paging response window.

39. The method of claim 36, wherein the requesting comprises paging the UE more aggressively in conjunction with the paging response window relative to how the UE is paged at other times.

40. The method of claim 36, wherein the paging hyper-frame is also determined based on a period for extended discontinuous reception (eDRX) of the UE.

41. The method of claim 36, wherein the at least one paging hyper-frame comprises a plurality of paging hyper-frames, each determined based on the period for eDRX.

42. The method of claim 36, further comprising:

transmitting a request, to one or more BSs, to cancel paging of the UE after detecting a paging response from the UE.

43. The method of claim 36, wherein:

paging hyper-frames for the UE are independent of a base station on which the UE is camping, at least within a tracking area.

44. The method of claim 36, further comprising:

determining that the UE has not responded to a page within a period of time; and

instructing one or more base stations (BSs) to page the UE outside of the paging hyper-frame.

45. The method of claim 36, further comprising:

determining that the UE has responded to a page;

starting a timer in response to determining that the UE has responded to the page; and

refraining from requesting one or more base stations (BSs) to page the UE until the expiration of the timer.

46. The method of claim 36, further comprising:

determining that the UE has responded to a page; and

sending a paging cancellation for the UE to one or more base stations based on the determination.

47. The method of claim 36, further comprising:

determining a tag number to be included in a page, wherein the requesting comprises sending the tag number to the one or more BSs.

48. An apparatus for wireless communications, comprising:

means for determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames;

means for receiving a request to page the UE; and

means for transmitting a paging signal to the UE in at least one subframe within a radio frame of the paging hyper-frame.

49. An apparatus for wireless communications, comprising:

means for determining at least one paging hyper-frame for monitoring for a paging signal from a base station (BS) based on an identification (ID) of a UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames; and

monitoring for the paging signal in at least one subframe within a radio frame of the paging hyper-frame.

50. An apparatus for wireless communications, comprising:

means for determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames; and

means for requesting one or more base stations (BSs) to page the UE differently upon occurrence of the paging hyper-frame than at other times.

51. A base station (BS), comprising:

at least one antenna; and

at least one processor configured to;

determine at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames,

receive a request to page the UE, and

transmit a paging signal, via the at least one antenna, to the UE in at least one subframe within a radio frame of the paging hyper-frame.

52. A user equipment (UE), comprising:

at least one antenna; and

a processor configured to;

determine at least one paging hyper-frame for monitoring for a paging signal from a base station (BS) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames, and

monitor for the paging signal in at least one subframe within a radio frame of the paging hyper-frame.

53. A network entity, comprising:

at least one network interface; and

a processor configured to;

determine at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames, and

request, via the network interface, one or more base stations (BSs) to page the UE differently upon occurrence of the paging hyper-frame than at other times.

54. A computer readable medium comprising computer-executable instructions for:

determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames;

receiving a request to page the UE; and

transmitting a paging signal to the UE in at least one subframe within a radio frame of the paging hyper-frame.

55. A computer readable medium comprising computer-executable instructions for:

determining at least one paging hyper-frame for monitoring for a paging signal from a base station (BS) based on an identification (ID) of a UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames; and

monitoring for the paging signal in at least one subframe within a radio frame of the paging hyper-frame.

56. A computer readable medium comprising computer-executable instructions for:

determining at least one paging hyper-frame for paging a user equipment (UE) based on an identification (ID) of the UE, the paging hyper-frame determined from a set of periodically occurring hyper-frames that each spans a number of radio frames; and

requesting one or more base stations (BSs) to page the UE differently upon occurrence of the paging hyper-frame than at other times.