Uplink transmission power configuration method and apparatus for mobile communication system

Patent metadata

Field	Value
Publication number	US-9468018-B2
Application number	US-201514821375-A
Country	US
Kind code	B2
Filing date	Aug 7, 2015
Priority date	Jan 11, 2011
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

A method and an apparatus for configuring uplink transmission power and apparatus in a mobile communication system supporting downlink and uplink carrier aggregation are provided. The method includes determining a per-terminal maximum transmission power and per-serving cell maximum transmission powers based on ΔT C,c as a value for allowing an adjustment of additional transmission power for multiple serving cells, Maximum Power Reduction c (MPR c ) as a value determined according to an amount of transmission resources allocated to the terminal, and Additive-MPR c (A-MPR c ) as a value determined according to local characteristics and frequency band characteristics, determining per-serving cell uplink transmission powers by restricting required transmission powers for respective serving cells to the corresponding per-serving cell maximum transmission powers, comparing a sum of the per-serving cell uplink transmission powers with the per-terminal maximum transmission power, and adjusting the per-serving cell uplink transmission powers according to comparison result.

First claim

What is claimed is:

1. A method of a terminal supporting carrier aggregation, the method comprising:
receiving uplink scheduling information for performing uplink transmission in at least two serving cells from a base station;
identifying a first uplink maximum transmission power for a first serving cell among the at least two serving cells;
identifying a second uplink maximum transmission power for a second serving cell among the at least two serving cells;
identifying a third uplink maximum transmission power for the terminal; and
identifying a transmission power based on the first uplink maximum transmission power, the second uplink maximum transmission power, and the third uplink maximum transmission power,
wherein the at least two serving cells are carrier aggregated for the terminal.

2. The method of claim 1 , wherein a lower limit of the third uplink maximum transmission power for the terminal is identified based on a maximum power reduction (MPR) parameter, an additive-maximum power reduction (A-MPR) parameter and a p-maximum power reduction (P-MPR).

3. The method of claim 1 , wherein an upper limit of the third uplink maximum transmission power for the terminal is identified based on information on maximum allowed transmission power of each of the at least two serving cells and information on power class of the terminal.

4. The method of claim 1 , wherein the identifying of the first uplink maximum transmission power and the second uplink maximum transmission power comprises applying an identical maximum power reduction (MPR) parameter and an identical additive-maximum power reduction (A-MPR) parameter to the first serving cell and the second serving cell.

5. The method of claim 4 , wherein the identical MPR parameter and the identical A-MPR parameter are applied to the first serving cell and the second serving cell, when the first serving cell and the second serving cell are operating on the same frequency band and adjacent to each other.

6. The method of claim 1 , wherein the identifying of the first uplink maximum transmission power and the second uplink maximum transmission power and the third uplink maximum transmission power comprises applying an identical MPR and an identical A-MPR.

7. The method of claim 1 , wherein the identifying of the transmission power comprises:
reducing, when a sum of the first uplink maximum transmission power and the second uplink maximum transmission power is greater than the third uplink maximum transmission power, the first uplink maximum transmission power and the second uplink maximum transmission power equal to the third uplink maximum transmission power; and
identifying the reduced first uplink maximum transmission power and the reduced second uplink maximum transmission power as the transmission power.

8. The method of claim 1 , wherein the identifying of the transmission power comprises,
Identifying, when a sum of the first uplink maximum transmission power and the second uplink maximum transmission power is equal to or less than the third uplink maximum transmission power, the first uplink maximum transmission power and the second uplink maximum transmission power as the transmission power.

9. A terminal supporting carrier aggregation, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
receive uplink scheduling information for performing uplink transmission in at least two serving cells from a base station,
identify a first uplink maximum transmission power for a first serving cell among the at least two serving cells,
identify a second uplink maximum transmission power for a second serving cell among the at least two serving cells,
identify a third uplink maximum transmission power for the terminal, and
identify a transmission power based on the first uplink maximum transmission power, the second uplink maximum transmission power, and the third uplink maximum transmission power,

wherein the at least two serving cells are carrier aggregated for the terminal.

10. The terminal of claim 9 , wherein a lower limit of the third uplink maximum transmission power for the terminal is identified based on a maximum power reduction (MPR) parameter, an additive-maximum power reduction (A-MPR) parameter and a p-maximum power reduction (P-MPR).

11. The terminal of claim 9 , wherein an upper limit of the third uplink maximum transmission power for the terminal is identified based on information on maximum allowed transmission power of each of the at least two serving cells and information on power class of the terminal.

12. The terminal of claim 9 , wherein the controller is further configured to apply an identical maximum power reduction (MPR) parameter and an identical additive-maximum power reduction (A-MPR) parameter to the first serving cell and the second serving cell for identifying the first uplink maximum transmission power and the second uplink maximum transmission power.

13. The terminal of claim 9 , wherein the identical MPR parameter and the identical A-MPR parameter are applied to the first serving cell and the second serving cell, when the first serving cell and the second serving cell are operating on the same frequency band and adjacent to each other.

14. The terminal of claim 9 , wherein the controller is further configured to:
apply an identical MPR and an identical A-MPR, when identifying the first uplink maximum transmission power, the second uplink maximum transmission power and the second uplink maximum transmission power.

15. The terminal of claim 9 , wherein the controller is further configured to:
reduce the first uplink maximum transmission power and the second uplink maximum transmission power to make the sum of the first uplink maximum transmission power and the second uplink maximum transmission power equal to the third uplink maximum transmission power, when a sum of the first uplink maximum transmission power and the second uplink maximum transmission power is greater than the third uplink maximum transmission power, and
identify the reduced first uplink maximum transmission power and the second uplink maximum transmission power as the transmission power.

16. The terminal of claim 9 , wherein the controller is further configured to:
identify the first uplink maximum transmission power and the second uplink maximum transmission power as the transmission power, when a sum of the first uplink maximum transmission power and the second uplink maximum transmission power is equal to or less than the third uplink maximum transmission power.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Soeng Hun
• Lieshout Gert-Jan Van
• Cho Joon Young
• Ng Boon Loong
• Jeong Kyeong In

Classifications

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• Y02B60/50

  Cross-Sectional Technologies · mapped topic

• H04W52/367

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

• H04W52/365

  Power headroom reporting · CPC title

• H04W52/146 Primary

  Uplink power control · CPC title