IP Library Granted Patent US 11,202,259
Granted Patent B2
US 11,202,259 · App. 16/590,656 · Granted Dec 14, 2021

Apparatus, system, and method for mobile station power saving

Inventors: Zhu Ji (San Jose, CA); Jia Tang (San Jose, CA); Dawei Zhang (Saratoga, CA); Wei Zeng (San Diego, CA); Yuchul Kim (Santa Clara, CA); Pengkai Zhao (San Jose, CA); Beibei Wang (Cupertino, CA); Haitong Sun (Irvine, CA); Wei Zhang (Santa Clara, CA)
Assignee: Apple Inc.
H04W52/0216H04W52/0229H04W68/005H04W72/0446
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Quick Facts
Patent No.
US 11,202,259
App. No.
16/590,656
Granted
Dec 14, 2021
Kind
B2
Abstract

Apparatuses, systems, and methods for performing power saving for a wireless device. The wireless device may connect to a base station (BS). The wireless device may establish discontinuous reception (DRX) with the BS, where the DRX comprises a DRX cycle having a cycle length. The wireless device may receive reference signal information from the base station in association with the DRX cycle length, where the reference signal information is transmitted according to the cycle length. The wireless device may perform tracking using the reference signal information.

Claims (39)

1. An apparatus, comprising:

a processor, configured to cause a user equipment device (UE) to:

connect to a base station (BS);

establish discontinuous reception (DRX) with the BS, wherein the DRX comprises a DRX cycle having a cycle length;

transmit a request to the BS, wherein the request indicates timing for reference signal information, the timing comprising m slots prior to a DRX on duration and a duration of n slots;

receive the reference signal information from the base station in association with the DRX cycle length, wherein the reference signal information is transmitted m slots prior to the DRX on duration for a duration of n slots in response to the request; and

perform tracking using the reference signal information.

2. The apparatus of claim 1 , wherein the DRX comprises connected mode DRX (CDRX).

3. The apparatus of claim 2 , wherein the reference signal information is received m slots before the CDRX on duration of each cycle.

4. The apparatus of claim 1 , wherein the DRX comprises idle mode DRX.

5. The apparatus of claim 4 , wherein the reference signal information is received m slots before a paging occasion of each cycle.

6. The apparatus of claim 1 , wherein the UE and BS communicate according to new radio (NR).

7. The apparatus of claim 1 , wherein the processor is further configured to cause the UE to receive DRX configuration information from the BS, wherein a location of the reference signal information is specified in the DRX configuration information.

8. The apparatus of claim 1 , wherein a location of the reference signal information is not indicated by the BS.

9. The apparatus of claim 4 , wherein m and n are specific to CDRX, wherein the request comprises separate timing for idle mode DRX.

10. The apparatus of claim 6 , wherein m and n are specific to idle mode DRX, wherein the request comprises separate timing for connected mode DRX (CDRX).

11. A device, comprising:

wireless communication circuitry; and

a processor coupled to the wireless communication circuitry, wherein the processor is configured to cause the device to:

connect to a base station (BS);

establish discontinuous reception (DRX) with the BS;

transmit a request to the BS, wherein the request indicates timing for reference signal information, the timing comprising m slots prior to a DRX on duration and a duration of n slots;

receive the reference signal information from the base station during a plurality of DRX cycles, wherein the reference signal information is received beginning m slots prior to the DRX on duration and continuing for a duration of n slots in response to the request; and

during each of the plurality of DRX cycles, perform tracking using the reference signal information.

12. The device of claim 11 , wherein the reference signal information is received beginning m slots before the DRX on duration of each of the plurality of DRX cycles.

13. The device of claim 11 , wherein the reference signal information is received in part during the DRX on duration of each of the plurality of DRX cycles.

14. The device of claim 11 , wherein the reference signal information is received at least in part during a paging occasion of each of the plurality of DRX cycles.

15. The device of claim 11 , wherein the reference signal information is received beginning m slots before a paging occasion of each of the plurality of DRX cycles.

16. An apparatus, comprising:

a processor, configured to cause a base station (BS) to:

connect to a user equipment (UE);

establish discontinuous reception (DRX) with the UE, wherein the DRX comprises a DRX cycle having a cycle length;

receive, from the UE a request, wherein the request indicates timing for reference signal information, the timing comprising m slots prior to a DRX on duration and a duration of n slots;

transmit, to the UE, the reference signal information, wherein the reference signal information is transmitted m slots prior to the DRX on duration for a duration of n slots in response to the request; and

perform tracking using the reference signal information.

17. The apparatus of claim 16 , wherein the DRX comprises connected mode DRX (CDRX).

18. The apparatus of claim 17 , wherein the reference signal information is transmitted m slots before the CDRX on duration of each cycle.

19. The apparatus of claim 16 , wherein the DRX comprises idle mode DRX.

20. The apparatus of claim 19 , wherein the reference signal information is received m slots before a paging occasion of each cycle.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 7, 2019
From: JI, ZHU; TANG, JIA; ZHANG, DAWEI; ZENG, WEI; KIM, YUCHUL; ZHAO, PENGKAI; WANG, BEIBEI; SUN, HAITONG; ZHANG, WEI
To: APPLE INC.
Reel/Frame 050645/0150 →
Continuity (2)
Provisional Application 62755218 · Nov 2, 2018
Related Publication 20200145918A1 · May 7, 2020
Cited By (3)
US 12,267,907 US 12,349,062 US 12,452,014