USER EQUIPMENT AND METHOD FOR ENHANCED UPLINK POWER CONTROL

• US 20150055454A1
• Filed: 08/21/2013
• Published: 02/26/2015
• Est. Priority Date: 08/21/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Yang, Rongzhen, Yin, Hujun, Chen, Xiaogang, Fwu, Jong-Kae, Li, Qinghua
• Granted Patent: US 9,264,963 B2
• Time in Patent Office: Days
• US Class Current: 370/230
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• 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 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/566 of the information or information source or recipient
• 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

Embodiments of user equipment and methods for improved uplink transmission power management and scheduling, are generally described herein. For example, in an aspect, a method of uplink power management is presented, the method includes determining whether a total desired transmission power exceeds a total configured maximum output power for a subframe. When the total desired transmission power exceeds the total configured maximum output power, the method includes allocating a minimum proactive power limitation to each serving cell, assigning a remaining power to one or more channels based on priority, and computing a total power assignment based on the allocating and the assigning.

Claims

1. User Equipment (UE) comprising:

processing circuitry arranged to;

determine whether a total desired transmission power over a plurality of channels exceeds a total configured maximum output power for a subframe when the UE is scheduled for concurrent physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission by an enhanced node B (cNB) in the subframe;

initially allocate a minimum proactive power to the channels; and

allocate any remaining power of a power budget to the channels based on priority, and

a transceiver configured by the processing circuitry to transmit the channels in accordance the minimum proactive power and the remaining power allocations,

wherein the PUCCH of a primary cell (PCell) is allocated power as a first priority, PUSCH with downlink control information (DCI) of the PCell is allocated power as a second priority, and a PUSCH without DCI of a secondary cell (SCell) is allocated power as a lowest priority.

2. The UE of claim 1 wherein the processing circuitry is further arranged compute a total power assignment from the minimum proactive power and the remaining power allocations for concurrent transmission of the channels.

3. The UE of claim 2 wherein the processing circuitry is arranged to initially allocate the minimum proactive power to the channels based on the priorities.

4. The UE of claim 3 wherein the processing circuitry is arranged to determine whether the total desired transmission power over the channels exceeds a total configured maximum output power for component carriers in the cells.

5. The UE of claim 4 wherein at least some of the component carriers are aggregated.

6. The UE of claim 4 wherein data traffic is offloaded to the PUSCH without DCI of the SCell, and the PUCCH of PCell and the PUSCH with DCI of the PCell is used for communicating management and control information with the eNB, and

wherein the processing circuitry is arranged to determine whether the total desired transmission power exceeds the total configured maximum output power for the subframe when the UE is scheduled for concurrent PUCCH and PUSCH in the PCell and PUSCH in the SCell transmission in the subframe.

7. The UE of claim 1 wherein the eNB is a primary eNB associated with the PCell, and wherein the UE and the primary eNB communicate in accordance with an OFDMA technique in accordance with one of the 3GPP LTE standards.

8. A method of uplink power management in user equipment (UE), the method comprising:

determining whether a total desired transmission power over a plurality of channels, each of the channels associated with a primary cell (PCell) or one or more secondary cells (SCells), exceeds a total configured maximum output power for a subframe, and where the total desired transmission power exceeds the total configured maximum output power;

allocating a minimum proactive power limitation to the PCell and one or more SCells associated with the UE;

assigning a remaining power to one or more channels based on priority; and

computing a total power assignment based on the allocating and the assigning, wherein the total power assignment governs an uplink power allocated to the one or more channels,

wherein the plurality of channels include a physical uplink control channel (PUCCH) and a physical uplink control channel (PUCCH).

9. The method of claim 8, wherein allocating a minimum proactive power limitation to each serving cell further comprises assigning at least a part of the PUCCH power as a first priority.

10. The method of claim 9, wherein allocating a minimum proactive power limitation to each serving cell associated with the UE further comprises assigning at least a part of the PUSCH with downlink control information (DCI) power as a second priority.

11. The method of claim 10, wherein allocating a minimum proactive power limitation to each serving cell further comprises assigning at least a part of the PUSCH without downlink control information (DCI) power as a lowest priority.

12. The method of claim 8, wherein assigning a remaining power to one or more channels based on priority further comprises assigning a remaining PUCCH power as a first remaining power priority.

13. The method of claim 9, wherein assigning a remaining power to one or more channels based on priority further comprises assigning a remaining PUSCH with downlink control information (DCI) power as a second remaining power priority.

14. The method of claim 10, wherein assigning a remaining power to one or more channels based on priority further comprises assigning a remaining PUSCH without downlink control information (DCI) power as a lowest remaining power priority.

15. A non-transitory machine readable storage medium comprising instructions that in response to being executed, cause processing circuitry to:

determine whether a total desired transmission power over a plurality of channels exceeds a total configured maximum output power for a subframe when a user equipment (UE) is scheduled for concurrent physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission by an enhanced node B (eNB) in the subframe;

initially allocate a minimum proactive power to the channels; and

allocate any remaining power of a power budget to the channels based on priority,

wherein the PUCCH of a primary cell (PCell) is allocated power as a first priority, a PUSCH with downlink control information (DCI) of the PCell is allocated power as a second priority, and a PUSCH without DCI of a secondary cell (SCell) is allocated power as a lowest priority.

16. The non-transitory machine readable storage medium of claim 15 wherein the processing circuitry is further arranged compute the total power assignment from the minimum proactive power and the remaining power allocations.

17. The non-transitory machine readable storage medium of claim 16 wherein the processing circuitry is arranged to initially allocate the minimum proactive power to the channels based on the priorities.

18. The non-transitory machine readable storage medium of claim 17 wherein the processing circuitry is arranged to determine whether the total desired transmission power over the channels exceeds a total configured maximum output power for all component carriers in all the cells.

19. User equipment (UE) comprising:

one or more antennas;

processing circuitry arranged to;

determine whether a total desired transmission power over a plurality of channels exceeds a total configured maximum output power for a subframe when the UE is scheduled for concurrent physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission by an enhanced node B (eNB) in the subframe;

initially allocate a minimum proactive power to the channels; and

allocate any remaining power of a power budget to the channels based on priority, and

a transceiver coupled to the one or more antennas and configured by the processing circuitry to transmit the channels in accordance the minimum proactive power and the remaining power allocations.

20. The UE of claim 19 wherein the PUCCH of a primary cell (PCell) is allocated power as a first priority, a PUSCH with downlink control information (DCI) of the PCell is allocated power as a second priority, and a PUSCH without DCI of a secondary cell (SCell) is allocated power as a lowest priority.