TECHNIQUES FOR MANAGING POWER ON AN UPLINK COMPONENT CARRIER TRANSMITTED OVER A SHARED RADIO FREQUENCY SPECTRUM BAND

• US 20160100420A1
• Filed: 09/18/2015
• Published: 04/07/2016
• Est. Priority Date: 10/02/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chen, Wanshi, Damnjanovic, Aleksandar
• Granted Patent: US 10,980,045 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Techniques are described for wireless communication. A first method includes identifying a first uplink component carrier of a plurality of component carriers configured for a user equipment (UE); determining that the first uplink component carrier is transmitted over a shared radio frequency spectrum band; and performing a power management operation on the first uplink component carrier, for a current subframe, based at least in part on the determining.

Claims

1. A method for wireless communication, comprising:

identifying a first uplink component carrier of a plurality of component carriers configured for a user equipment (UE);

determining that the first uplink component carrier is transmitted over a shared radio frequency spectrum band; and

performing a power management operation on the first uplink component carrier, for a current subframe, based at least in part on the determining.

2. The method of claim 1, wherein performing the power management operation comprises:

maintaining a transmit power on the first uplink component carrier at or above a minimum guaranteed power.

3. The method of claim 2, wherein the minimum guaranteed power depends on a channel type or uplink information type transmitted on the first uplink component carrier.

4. The method of claim 3, further comprising:

scheduling at least one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) on the first uplink component carrier during the current subframe.

5. The method of claim 4, wherein the minimum guaranteed power comprises at least one of a PUCCH minimum guaranteed power component and a PUSCH minimum guaranteed power component, and wherein the PUCCH minimum guaranteed power component is greater than the PUSCH minimum guaranteed power component.

6. The method of claim 1, wherein performing the power management operation comprises:

scaling a transmit power on the first uplink component carrier to a reduced power for the current subframe.

7. The method of claim 6, further comprising:

using the reduced power as a maximum transmit power on the first uplink component carrier for at least one subsequent subframe following the current subframe.

8. The method of claim 7, wherein the at least one subsequent subframe comprises at least one uplink subframe between the current subframe and a boundary of a subsequent frame.

9. The method of claim 6, further comprising:

dropping a transmission on the first uplink component carrier for at least one of a number of uplink subframes between the current subframe and a boundary of a subsequent frame.

10. The method of claim 6, wherein the scaling surpasses a threshold power reduction, the method further comprising:

dropping a transmission on the first uplink component carrier for at least one of a number of uplink subframes between the current subframe and a boundary of a subsequent frame.

11. The method of claim 1, wherein performing the power management operation comprises:

using a transmit power on the first uplink component carrier during a subframe preceding the current subframe, the transmit power being a maximum transmit power on the first uplink component carrier for the current subframe.

12. The method of claim 1, wherein performing the power management operation comprises:

dropping a transmission on the first uplink component carrier for the current subframe.

13. The method of claim 12, further comprising:

dropping a transmission on the first uplink component carrier for at least one of a number of uplink subframes between the current subframe and a boundary of a subsequent frame.

14. The method of claim 12, further comprising:

dropping a transmission on the first uplink component carrier for at least one of a number of uplink subframes between the current subframe and a boundary of a subsequent frame.

15. The method of claim 12, further comprising:

performing a clear channel assessment (CCA) for the shared radio frequency spectrum band, the CCA being performed for at least one subsequent uplink subframe following the current subframe.

16. The method of claim 1, further comprising:

receiving a first uplink scheduling for the first uplink component carrier for the current subframe; and

receiving a second uplink scheduling for the first uplink component carrier for the current subframe.

17. The method of claim 16, further comprising:

using the second uplink scheduling based at least in part on performing the power management operation.

18. The method of claim 16, further comprising:

using the first uplink scheduling or the second uplink scheduling based at least in part on a condition of the power management operation.

19. The method of claim 16, wherein performing the power management operation comprises

scaling the transmit power on the first uplink component carrier to a reduced power for the current subframe;

using the first uplink scheduling when the scaling does not surpass a threshold power reduction; and

using the second uplink scheduling when the scaling surpasses the threshold power reduction.

20. The method of claim 1, wherein the plurality of component carriers comprises a second uplink component carrier transmitted over the shared radio frequency spectrum band.

21. The method of claim 1, wherein the plurality of component carriers comprises a second uplink component carrier transmitted over a licensed radio frequency spectrum band.

22. The method of claim 1, wherein the plurality of component carriers is configured for a carrier aggregation operation for the UE.

23. The method of claim 1, wherein the plurality of component carriers is configured for a dual-connectivity operation for the UE.

24. An apparatus for wireless communication, comprising:

means for identifying a first uplink component carrier of a plurality of component carriers configured for a user equipment (UE);

means for determining that the first uplink component carrier is transmitted over a shared radio frequency spectrum band; and

means for performing a power management operation on the first uplink component carrier, for a current subframe, based at least in part on the determining.

25. An apparatus for wireless communication, comprising:

a processor;

memory in electronic communication with the processor; and

the processor and the memory configured to;

identify a first uplink component carrier of a plurality of component carriers configured for a user equipment (UE);

determine that the first uplink component carrier is transmitted over a shared radio frequency spectrum band; and

perform a power management operation on the first uplink component carrier, for a current subframe, based at least in part on the determining.

26. The apparatus of claim 25, wherein the processor and the memory are configured to:

maintain a transmit power on the first uplink component carrier at or above a minimum guaranteed power.

27. The apparatus of claim 26, wherein the minimum guaranteed power depends on a channel type or uplink information type transmitted on the first uplink component carrier.

28. The apparatus of claim 25, wherein the processor and the memory are configured to:

scale a transmit power on the first uplink component carrier to a reduced power for the current subframe.

29. The apparatus of claim 28, wherein the processor and the memory are configured to:

use the reduced power as a maximum transmit power on the first uplink component carrier for at least one subsequent subframe following the current subframe.

30. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code executable by a processor to:

identify a first uplink component carrier of a plurality of component carriers configured for a user equipment (UE);

determine that the first uplink component carrier is transmitted over a shared radio frequency spectrum band; and

perform a power management operation on the first uplink component carrier, for a current subframe, based at least in part on the determining.