Method and apparatus for controlling uplink transmission power in wireless communication system

• US 9,629,103 B2
• Filed: 12/10/2014
• Issued: 04/18/2017
• Est. Priority Date: 06/23/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Soeng-Hun, Cho, Joon-Young, Han, Jin-Kyu
• Primary Examiner(s): Aminzay, Shaima Q
• Application Number:
  US14/566,036
• Publication Number:
  US 20150094115A1
• Time in Patent Office: 860 Days
• Field of Search: 455522, 455450, 4554521, 455 70, 455 68, 455 6711, 375326, 375141, 370482
• CPC Class Codes: H04W 52/06 TPC algorithms
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/246 where the output power of a terminal is based on a path parameter calculated in said terminal
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level

Abstract

Methods and apparatuses are provided for controlling an uplink transmission power in wireless communication system. Information is received indicating a reference downlink carrier among a plurality of downlink carriers for measuring a pathloss. The pathloss of the indicated reference downlink carrier is measured. A transmit power control (TPC) command is received. The uplink transmission power is determined based on the TPC command and the measured pathloss. Data is transmitted using the determined uplink transmission power.

Claims

1. A method for controlling an uplink transmission power in a wireless communication system, the method comprising:

receiving, by a terminal, information indicating which downlink carrier is applied as a pathloss reference downlink carrier for measuring a pathloss associated with uplink transmission among a plurality of downlink carriers;

measuring, by a terminal, the pathloss of the path loss reference downlink carrier;

receiving, by a terminal, a transmit power control (TPC) command;

determining, by a terminal, the uplink transmission power based on the TPC command and the measured pathloss; and

transmitting, by a terminal, data using the determined uplink transmission power,

wherein the information comprises one of first information indicating a predefined downlink carrier and second information indicating a downlink carrier linked to an uplink carrier.

2. The method of claim 1, further comprising:

receiving control information including linkage information between the uplink carrier and the downlink carrier.

3. The method of claim 2, wherein the control information comprises an uplink carrier frequency and an uplink bandwidth.

4. A method for controlling an uplink transmission power in a wireless communication system, the method comprising:

transmitting, by a base station, information indicating which downlink carrier is applied as a pathloss reference downlink carrier for measuring a pathloss associated with uplink transmission among a plurality of downlink carriers;

transmitting, by a base station, a transmit power control (TPC) command; and

receiving, by a base station, data using the uplink transmission power,

wherein the uplink transmission power is determined based on the TPC command and the measured pathloss, and

wherein the information comprises one of first information indicating a predefined downlink carrier and second information indicating a downlink carrier linked to an uplink carrier.

5. The method of claim 4, further comprising:

transmitting control information including linkage information between the uplink carrier and the downlink carrier.

6. The method of claim 5, wherein the control information comprises an uplink carrier frequency and an uplink bandwidth.

7. A terminal for controlling an uplink transmission power in a wireless communication system, the terminal comprising:

a transceiver for transmitting and receiving signals to and from a base station; and

a controller configured to control to;

receive information indicating which downlink carrier is applied as a pathloss reference downlink carrier for measuring a pathloss associated with uplink transmission among a plurality of downlink carriers,

measure the pathloss of the pathloss reference downlink carrier,

receive a transmit power control (TPC) command,

determine the uplink transmission power based on the TPC command and the measured pathloss, and

transmit data using the determined uplink transmission power, and

wherein the information comprises one of first information indicating a predefined downlink carrier and second information indicating a downlink carrier linked to an uplink carrier.

8. The terminal of claim 7, wherein the controller is further configured to control to receive control information including linkage information between the uplink carrier and the downlink carrier.

9. The terminal of claim 8, wherein the control information comprises an uplink carrier frequency and an uplink bandwidth.

10. A base station for controlling an uplink transmission power in a wireless communication system, the base station comprising:

a transceiver for transmitting and receiving signals to and from a terminal; and

a controller configured to control to;

transmit information indicating which downlink carrier is applied as a pathloss reference downlink carrier for measuring a pathloss associated with uplink transmission among a plurality of downlink carriers,

transmit a transmit power control (TPC) command, and

receive data using the uplink transmission power,

wherein the uplink transmission power is determined based on the TPC command and the measured pathloss, and

wherein the information comprises one of first information indicating a predefined downlink carrier and second information indicating a downlink carrier linked to an uplink carrier.

11. The base station of claim 10, wherein the controller is further configured to control to transmit control information including linkage information between the uplink carrier and the downlink carrier.

12. The base station of claim 11, wherein the control information comprises an uplink carrier frequency and an uplink bandwidth.