Signal transmission power adjustment in a wireless device

Patent metadata

Field	Value
Publication number	US-9736795-B2
Application number	US-201514966439-A
Country	US
Kind code	B2
Filing date	Dec 11, 2015
Priority date	Apr 16, 2012
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A wireless device transmits a first signal in a first cell group and transmits a second signal in a second cell group. The wireless device adjusts a signal transmission power of one of the first signal and the second signal if a power value exceeds an allowable transmission power and if an overlapping in time exceeds a first duration.

First claim

What is claimed is:

1. A method comprising:
receiving, by a wireless device, at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the second cell group; and

transmitting a first signal in a first subframe of the first cell group and transmitting a second signal via the second cell group, wherein the first signal overlaps, in time, with the second signal in a second subframe, and wherein a signal transmission power of the first signal is scaled if a power value exceeds an allowable transmission power and if a duration of the overlap in time exceeds a duration threshold.

2. The method of claim 1 , wherein the transmitting the first signal comprises transmitting the first signal via one or more of:
a physical uplink control channel; or
a physical uplink shared channel.

3. The method of claim 1 , wherein the transmitting the second signal comprises transmitting the second signal via one or more of:
a physical uplink control channel; or
a physical uplink shared channel.

4. The method of claim 1 , wherein the first signal comprises a random access preamble.

5. The method of claim 1 , wherein the duration threshold is more than twenty micro seconds.

6. The method of claim 1 , wherein the duration threshold is configured such that a transmission power is less than or equal to the allowable transmission power during the overlap in time.

7. The method of claim 1 , wherein the allowable transmission power is a maximum allowable transmission power associated with the wireless device.

8. The method of claim 1 , wherein the power value is a calculated total transmission power associated with the wireless device.

9. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the second cell group; and

transmit a first signal in a first subframe of the first cell group and transmit a second signal via the second cell group, wherein the first signal overlaps, in time, with the second signal in a second subframe, and wherein a signal transmission power of at least one of the first signal and the second signal is scaled if a power value exceeds an allowable transmission power and if a duration of the overlap in time exceeds a duration threshold.

10. The wireless device of claim 9 , wherein the instructions that, when executed by the one or more processors, cause the wireless device to transmit the first signal, cause the wireless device to transmit the first signal via one or more of:
a physical uplink control channel; or
a physical uplink shared channel.

11. The wireless device of claim 9 , wherein the instructions that, when executed by the one or more processors, cause the wireless device to transmit the second signal, cause the wireless device to transmit the second signal via one or more of:
a physical uplink control channel; or
a physical uplink shared channel.

12. The wireless device of claim 9 , wherein the first signal comprises a random access preamble.

13. The wireless device of claim 9 , wherein the duration threshold is more than twenty micro seconds.

14. The wireless device of claim 9 , wherein the duration threshold is configured such that a transmission power is less than or equal to the allowable transmission power during the overlap in time.

15. The wireless device of claim 9 , wherein the allowable transmission power is a maximum allowable transmission power associated with the wireless device.

16. The wireless device of claim 9 , wherein the power value is a calculated total transmission power associated with the wireless device.

17. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the second cell group; and

transmit a first signal starting in a first subframe of a cell of the first cell group, and transmit, overlapping in time with the first signal, a second signal starting in a second subframe of the second cell group, wherein a signal transmission power of the second signal is adjusted if a power value exceeds an allowable transmission power, and wherein the power value is based at least in part on a transmission power of the first signal and the second signal if the first subframe and the second subframe overlap in time more than a duration threshold.

18. The wireless device of claim 17 , wherein the instructions that, when executed by the one or more processors, cause the wireless device to transmit the first signal, cause the wireless device to transmit the first signal via one or more of:
a physical uplink control channel; or
a physical uplink shared channel.

19. The wireless device of claim 17 , wherein the instructions that, when executed by the one or more processors, cause the wireless device to transmit the second signal, cause the wireless device to transmit the second signal via one or more of:
a physical uplink control channel; or
a physical uplink shared channel.

20. The wireless device of claim 17 , wherein the first signal comprises a random access preamble.

21. The wireless device of claim 17 , wherein the allowable transmission power is a maximum allowable transmission power associated with the wireless device.

22. The wireless device of claim 17 , wherein the power value is a calculated total transmission power associated with the wireless device.

23. The wireless device of claim 17 , wherein the duration threshold is configured such that a calculated total transmission power is less than or equal to a maximum allowable transmission power associated with the wireless device during the overlap in time.

24. The wireless device of claim 17 , wherein the duration threshold is more than twenty micro seconds.

25. A method comprising:
transmitting, by a base station, at least one control message comprising configuration parameters of a plurality of cells comprising a first cell group and a second cell group, wherein:
uplink transmission timing associated with the first cell group is based on a first cell of the first cell group; and
uplink transmission timing associated with the second cell group is based on a second cell of the second cell group;

receiving, by a wireless device, the at least one control message; and
transmitting a first signal in a first subframe of the first cell group and

Assignees

• Comcast Cable Comm Llc

Inventors

• Dinan Esmael Hejazi

Classifications

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04B7/2618

  using hybrid code-time division multiple access [CDMA-TDMA] · CPC title

• H04W52/54

  Signalisation aspects of the TPC commands, e.g. frame structure · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04W76/38

  triggered by timers · CPC title