IP Library Granted Patent US 11,140,742
Granted Patent B2
US 11,140,742 · App. 15/621,072 · Granted Oct 5, 2021

Methods and apparatus for cell discontinuous transmission (DTX) scheduling

Inventors: Keiichi Kubota (San Diego, CA); Gavin Bernard Horn (La Jolla, CA); Luis Lopes (Swindon, GB); Masato Kitazoe (Hachiouji, JP)
Assignee: QUALCOMM Incorporated
H04W76/28H04W48/08H04W52/0206H04W52/0216H04W52/0219H04W72/0446H04W72/1263H04W72/1289H04W88/08H04W48/02H04W48/20H04W52/02H04W68/00Y02D30/70
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Quick Facts
Patent No.
US 11,140,742
App. No.
15/621,072
Filed
Jun 13, 2017
Granted
Oct 5, 2021
Kind
B2
Examiner
MIAN, OMER S
Art Unit
2461
USPC
370/278
Abstract

Certain aspects of the present disclosure relate to methods and apparatus for cell DTX (Discontinuous Transmission) scheduling. A Base Station (BS) determines an operational schedule for the BS including at least one ON period and at least one OFF period, wherein the BS provides a reduced level of service during the at least one OFF period relative to the at least one ON period. The BS transmits the determined operational schedule. A User Equipment (UE) receives the BS's operational schedule and determines, based on the BS's operational schedule and its own operational schedule also including ON and OFF periods, whether to perform at least one service associated with the BS.

Claims (71)

1. A method of wireless communication by a user equipment (UE), comprising:

transmitting a preferred paging interval of the UE;

receiving a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods, and wherein the received first operational schedule comprises a schedule adjusted based on the transmitted preferred paging interval;

determining a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods; and

camping on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfying a minimum reachability requirement of the UE.

2. The method of claim 1 , wherein the minimum reachability requirement is satisfied when at least one overlapped portion of the ON periods from the first and second sets is longer than a given threshold overlap period.

3. The method of claim 1 , wherein determining the second operational schedule for the UE comprises receiving the second operational schedule, wherein the received second operational schedule is configured based on the first operational schedule.

4. The method of claim 1 , wherein the first operational schedule includes a discontinuous transmission (DTX) schedule and the second operational schedule includes a discontinuous reception (DRX) schedule.

5. An apparatus for wireless communication by a user equipment (UE), comprising:

means for transmitting a preferred paging interval of the UE;

means for receiving a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods, and wherein the received first operational schedule comprises a schedule adjusted based on the transmitted preferred paging interval;

means for determining a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods; and

means for camping on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfying a minimum reachability requirement of the UE.

6. The apparatus of claim 5 , wherein the minimum reachability requirement is satisfied when at least one overlapped portion of the ON periods from the first and second sets is longer than a given threshold overlap period.

7. The apparatus of claim 5 , further comprising means for transmitting a preferred paging interval of the UE, wherein the first operational schedule comprises a schedule adjusted based on the transmitted preferred paging interval.

8. The apparatus of claim 5 , wherein the means for determining the second operational schedule for the UE comprises means for receiving the second operational schedule, wherein the received second operational schedule is configured based on the first operational schedule.

9. The apparatus of claim 5 , wherein the first operational schedule includes a discontinuous transmission (DTX) schedule and the second operational schedule includes a discontinuous reception (DRX) schedule.

10. A method of wireless communication by a user equipment (UE), comprising:

receiving a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods;

determining a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods;

refraining from camping on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set failing to satisfy a minimum reachability requirement of the UE;

transmitting a preferred paging interval of the UE, based on the length of the overlap failing to satisfy the minimum reachability requirement of the UE, to request an adjusted first operational schedule for the base station; and

receiving, from the base station, the adjusted first operational schedule of the base station such that a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfies the minimum reachability requirement of the UE.

11. The method of claim 10 , further comprising refraining from camping on the base station based on at least one ON period from the second set overlapping at least one OFF period from the first set.

12. The method of claim 10 , further comprising refraining from camping on the base station based on at least one OFF period from the first set being longer than a given threshold period.

13. The method of claim 10 , wherein determining the second operational schedule for the UE comprises receiving the second operational schedule, wherein the received second operational schedule is configured based on the first operational schedule.

14. The method of claim 10 , wherein the first operational schedule includes a discontinuous transmission (DTX) schedule and the second operational schedule includes a discontinuous reception (DRX) schedule.

15. An apparatus for wireless communication by a user equipment (UE), comprising:

means for receiving a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods;

means for determining a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods;

means for refraining from camping on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set failing to satisfy a minimum reachability requirement of the UE;

means for transmitting a preferred paging interval of the UE, based on the length of the overlap failing to satisfy the minimum reachability requirement of the UE, to request an adjusted first operational schedule; and

means for receiving, from the base station, the adjusted first operational schedule of the base station such that a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfies the minimum reachability requirement of the UE.

16. The apparatus of claim 15 , further comprising means for refraining from camping on the base station based on at least one ON period from the second set overlapping at least one OFF period from the first set.

17. The apparatus of claim 15 , further comprising means for refraining from camping on the base station based on at least one OFF period from the first set being longer than a given threshold period.

18. The apparatus of claim 15 , wherein determining the second operational schedule for the UE comprises receiving the second operational schedule, wherein the received second operational schedule is configured based on the first operational schedule.

19. The apparatus of claim 15 , wherein the first operational schedule includes a discontinuous transmission (DTX) schedule and the second operational schedule includes a discontinuous reception (DRX) schedule.

20. An apparatus for wireless communications by a user equipment (UE), comprising:

a memory; and

a processor coupled to the memory, the memory and the processor configured to:

receive a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods;

determine a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods; and

refrain from camping on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set failing to satisfy a minimum reachability requirement of the UE;

transmit a preferred paging interval of the UE, based on the length of the overlap failing to satisfy the minimum reachability requirement of the UE, to request an adjusted first operational schedule; and

receive, from the base station, the adjusted first operational schedule of the base station such that a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfies the minimum reachability requirement of the UE.

21. The apparatus of claim 20 , wherein the memory and the processor are further configured to refrain from camping on the base station based on at least one ON period from the second set overlapping at least one OFF period from the first set.

22. The apparatus of claim 20 , wherein the memory and the processor are further configured to refrain from camping on the base station based on at least one OFF period from the first set being longer than a given threshold period.

23. The apparatus of claim 20 , wherein determining the second operational schedule for the UE comprises receiving the second operational schedule, wherein the received second operational schedule is configured based on the first operational schedule.

24. The apparatus of claim 20 , wherein the first operational schedule includes a discontinuous transmission (DTX) schedule and the second operational schedule includes a discontinuous reception (DRX) schedule.

25. A non-transitory computer-readable medium including instructions that, when executed by a processing system, cause the processing system to:

receive a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods;

determine a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods; and

refrain from camping on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set failing to satisfy a minimum reachability requirement of the UE;

transmit a preferred paging interval of the UE, based on the length of the overlap failing to satisfy the minimum reachability requirement of the UE, to request an adjusted first operational schedule; and

receive, from the base station, the adjusted first operational schedule of the base station such that a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfies the minimum reachability requirement of the UE.

26. An apparatus for wireless communications by a user equipment (UE), comprising:

a memory; and

a processor coupled to the memory, the memory and the processor configured to:

transmit a preferred paging interval of the UE;

receive a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods, and wherein the received first operational schedule comprises a schedule adjusted based on the transmitted preferred paging interval;

determine a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods; and

camp on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfying a minimum reachability requirement of the UE.

27. The apparatus of claim 26 , wherein the minimum reachability requirement is satisfied when at least one overlapped portion of the ON periods from the first and second sets is longer than a given threshold overlap period.

28. The apparatus of claim 26 , wherein the memory and the processor are further configured to transmit a preferred paging interval of the UE, wherein the first operational schedule comprises a schedule adjusted based on the transmitted preferred paging interval.

29. The apparatus of claim 26 , wherein determining the second operational schedule for the UE comprises receiving the second operational schedule, wherein the received second operational schedule is configured based on the first operational schedule.

30. The apparatus of claim 26 , wherein the first operational schedule includes a discontinuous transmission (DTX) schedule and the second operational schedule includes a discontinuous reception (DRX) schedule.

31. A non-transitory computer-readable medium including instructions that, when executed by a processing system, cause the processing system to:

transmit a preferred paging interval of the UE;

receive a first operational schedule for a base station including a first set of ON periods and a first set of OFF periods, wherein the base station is configured to provide a reduced level of service during the first set of OFF periods relative to the first set of ON periods, and wherein the received first operational schedule comprises a schedule adjusted based on the transmitted preferred paging interval;

determine a second operational schedule for the UE including a second set of ON periods and a second set of OFF periods, wherein the UE is configured to switch to a battery efficient operation mode during the second set of OFF periods relative to the second set of ON periods; and

camp on the base station based on a length of an overlap between at least one ON period from the second set with at least one ON period from the first set satisfying a minimum reachability requirement of the UE.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 11, 2017
From: KUBOTA, KEIICHI; HORN, GAVIN BERNARD; LOPES, LUIS; KITAZOE, MASATO
To: QUALCOMM INCORPORATED
Reel/Frame 042977/0942 →
Continuity (2)
Provisional Application 62374459 · Aug 12, 2016
Related Publication 20180049270A1 · Feb 15, 2018