Uplink Power Control in Wireless Communication Systems

• US 20120188947A1
• Filed: 06/09/2010
• Published: 07/26/2012
• Est. Priority Date: 10/02/2009
• Status: Abandoned Application

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Larsson, Daniel, Gerstenberger, Dirk, Lindbom, Lars
• Application Number:
  US13/499,043
• Publication Number:
  US 20120188947A1
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04B 7/12 Frequency diversity
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure

Abstract

Methods in a Long Term Evolution (LTE) base station for controlling transmit power of a User Equipment(UE) are provided. The method includes configuring UE individual power weighting factors to be used for weighting available UE transmit power between uplink component carriers and/or between Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH); and signaling the configured UE individual power weighting factors to the UE. Related methods and arrangements are also provided.

Claims

1. A method in a Long Term Evolution (LTE) base station for controlling transmit power of a User Equipment (UE), the method comprising:

configuring UE individual power weighting factors to be used for weighting available UE transmit power between uplink component carriers and/or between Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel, PUSCH (PUSCH); and

signaling the configured UE individual power weighting factors to the UE.

2. The method of claim 1, wherein the configured UE individual power weighting factors are signaled implicitly to the UE.

3. The method of claim 1, wherein the configured UE individual power weighting factors are signaled explicitly to the UE.

4. The method of claim 1, wherein the base station configures UE individual power weighting factors to be used for weighting available UE transmit power between component carriers.

5. The method of claim 4, wherein one or more uplink component carriers are prioritized by configuring the UE individual power weighting factors such that PUSCH power is first reduced on non-prioritized component carriers.

6. The method of claim 5, wherein the prioritized uplink component carriers are configured to carry control information.

7. The method of claim 1, wherein the base station configures UE individual power weighting factors to be used for weighting available UE transmit power between PUCCH and PUSCH.

8. The method of claim 7, wherein the base station configures a PUCCH specific weighting factor to weight transmit power on PUCCH relative to transmit power on PUSCH.

9. The method of claim 7, wherein the base station configures a PUSCH specific weighting factor to weight transmit power on PUSCH relative to transmit power on PUCCH.

10. A method in a Long Term Evolution (LTE) User Equipment (UE) for controlling transmit power of the UE, the method comprising:

receiving UE individual power weighting factors to be used for weighting available UE transmit power between uplink component carriers and/or between Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH); and

applying the received UE individual power weighting factors on the available UE transmit power during transmission.

11. The method of claim 10, wherein the configured UE individual power weighting factors are signaled implicitly from a base station.

12. The method of claim 10, wherein the configured UE individual power weighting factors are signaled explicitly from a base station.

13. The method of claim 10, wherein the UE individual power weighting factors are received to be used for weighting available UE transmit power between component carriers.

14. The method of claim 13, wherein one or more uplink component carriers are prioritized by receiving UE individual power weighting factors configured such that the power is first reduced on non-prioritized component carriers.

15. The method of claim 14, wherein the prioritized uplink component carriers are configured to carry control information.

16. The method of claim 10, wherein the UE individual power weighting factors are received to be used for weighting available UE transmit power between PUCCH and PUSCH.

17. The method of claim 16, wherein a PUCCH specific weighting factor is received to weight transmit power on PUCCH relative to transmit power on PUSCH.

18. The method of claim 16, wherein a PUSCH specific weighting factor is received to weight transmit power on PUSCH relative to transmit power on PUCCH.

19. The method of claim 10, further comprising:

applying a respective scaling factor on the received weighting factors to scale the distributed available transmit power between component carriers and/or between PUSCH and PUCCH.

20. A Long Term Evolution (LTE) base station for controlling transmit power of a User Equipment (UE) the base station

a processor for configuring UE individual power weighting factors to be used for weighting available UE transmit power between uplink component carriers and/or between Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH) and a transmitter for signaling the configured UE individual power weighting factors to the UE.

21. The base station of claim 20, wherein the processor is further configured to configure UE individual power weighting factors to be used for weighting available UE transmit power between component carriers.

22. The base station of claim 21, wherein the processor is configured to prioritize component carriers by configuring the UE individual power weighting factors such that PUSCH power is first reduced on non-prioritised component carriers.

23. The base station of claim 20, wherein the processor is further configured to configure UE individual power weighting factors to be used for weighting available UE transmit power between PUCCH and PUSCH.

24. The base station of claim 23, wherein the processor is further configured to configure a PUCCH specific weighting factor to weight transmit power on PUCCH relative to transmit power on PUSCH or to weight the transmit power on PUSCH relative to the transmit power on PUCCH.

25. A Long Term Evolution (LTE) User Equipment (UE) for controlling transmit power of the UE, the UE comprising:

a receiver for receiving UE individual power weighting factors to be used for weighting available UE transmit power between uplink component carriers and/or between Physical Uplink Control Channel (PUCCH) and Physical Uplink Shared Channel (PUSCH); and

a processor for applying the received UE individual power weighting factors on the available UE transmit power during transmission.

26. The UE of claim 25, wherein the receiver is configured to receive UE individual power weighting factors and the processor is adapted to use them for weighting of available UE transmit power between component carriers.

27. The UE of claim 25, wherein the receiver is configured to receive UE individual power weighting factors and the processor is adapted to use them for weighting of available UE transmit power between PUCCH and PUSCH.

28. The UE of claim 27, wherein the receiver is configured to receive a PUCCH specific weighting factor to be used by the processor to weight transmit power on PUCCH relative to transmit power on PUSCH or to weight the transmit power on PUSCH relative to the transmit power on PUCCH.

29. The UE claim 25, wherein the processor is further configured to apply a respective scaling factor on the received weighting factors to scale the distributed available transmit power between component carriers and/or between PUSCH and PUCCH.