METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER AND APPARATUS THEREOF

• US 20160234788A1
• Filed: 11/05/2014
• Published: 08/11/2016
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: NOH, Minseok, CHOI, Woo-jin
• Granted Patent: US 9,713,094 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/146 Uplink power control
• 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

Abstract

Provided are a method and an apparatus for controlling uplink transmission power. A method for controlling uplink transmission power by a terminal may include allocating transmission power of one or more uplink control channels and/or one or more uplink data channels in order to transmit the uplink control channels and/or the uplink data channels in two or more cells and transmitting the uplink control channel and/or the uplink data channel to one or more base stations according to the allocated transmission power.

Claims

1. A method for controlling uplink transmission power by a user equipment, the method comprising:

allocating at least one of i) transmission power of at least one Physical Uplink Control CHannel (PUCCH) and ii) transmission power of at least one Physical Uplink Shared CHannel (PUSCH) in order to transmit the PUCCH and the PUSCH on two or more cells; and

transmitting at least one of the PUCCH and the PUSCH to at least one base station according to the allocated transmission power.

2. The method as claimed in claim 1, wherein the allocating comprises assigning a priority to a cell belonging to a first base station among cells on which the PUCCH is transmitted and allocating the transmission power first to the cell assigned with the priority.

3. The method as claimed in claim 1, wherein the allocating comprises allocating the transmission power based on at least one of i) whether the PUCCH or the PUSCH includes Uplink Control Information (UCI), ii) a type of the UCI, and iii) a number of the pieces of UCI.

4. The method as claimed in claim 1, wherein:

transmission power of a PUSCH on a first cell is less than or equal to a first value; and

the first value is obtained by i) obtaining a second value by scaling transmission power of a PUCCH transmitted on the first cell using a scaling factor of the first cell and ii) subtracting the second value from total transmission power.

5. The method as claimed in claim 1, wherein when one of cells has a PUSCH including UCI to transmit, the user equipment prioritizes the PUSCH including UCI over a PUSCH excluding UCI of the other cells and first allocates transmission power to the PUSCH including the UCI.

6. The method as claimed in claim 1, wherein the user equipment receives, from the base station, a Radio Resource Control (RRC) configuration parameter as indication information indicating simultaneous uplink transmission on the two or more cells.

7. The method as claimed in claim 1, wherein:

the two or more cells include a first cell and a second cell;

the first cell is a Primary cell (Pcell) and the second cell is a Secondary cell (Scell); and

the first cell is controlled by a master base station and the second cell is controlled by the secondary base station, or the first cell is controlled by the secondary base station and the second cell is controlled by the master base station.

8. The method as claimed in claim 1, wherein the allocating comprises assigning a priority to the PUCCH including Hybrid Automatic Repeat reQuest (HARQ)-ACKnowledgement (ACK) and allocating the transmission power first to the PUCCH including HARQ-ACK.

21. The method as claimed in claim 1, wherein when one of cells has a PUSCH including HARQ-ACK to transmit, the user equipment prioritizes the PUSCH including HARQ-ACK over at least one of a PUCCH and a PUSCH excluding HARQ-ACK of the other cells and first allocates transmission power to the PUSCH including the HARQ-ACK.

9. A method for controlling uplink transmission power of a user equipment by a base station, the method comprising:

transmitting, to the user equipment, a Radio Resource Control (RRC) configuration parameter as indication information indicating simultaneous transmission of Uplink Control Information (UCI) on two or more cells; and

receiving, from the user equipment, at least one Physical Uplink Control CHannel (PUCCH) and/or at least one Physical Uplink Shared CHannel (PUSCH), which have transmission power controlled according to the indication information.

10. The method as claimed in claim 9, wherein the transmission power is determined by a priority assigned to a cell belonging to a first base station among cells on which the PUCCH is transmitted.

11. The method as claimed in claim 9, wherein the transmission power is determined according to at least one of i) whether one of the PUCCH and the PUSCH includes UCI, ii) a type of the UCI, and iii) a number of the pieces of UCI.

12. The method as claimed in claim 9, wherein:

transmission power of a PUSCH on a first cell is less than or equal to a first value; and

the first value is obtained by i) obtaining a second value by scaling transmission power of a PUCCH transmitted on the first cell using a scaling factor of the first cell and ii) subtracting the second value from total transmission power.

13. The method as claimed in claim 9, wherein when one of cells has a PUSCH including UCI to transmit, the PUSCH including UCI is prioritized over a PUSCH excluding UCI in the other cells, and the PUSCH is first allocated with transmission power.

14. The method as claimed in claim 9, wherein the transmission power is determined based on a priority assigned to the PUCCH including Hybrid Automatic Repeat reQuest (HARQ)-ACKnowledgement (ACK).

15. A user equipment for controlling uplink transmission power, the user equipment comprising:

a reception unit configured to receive a downlink from a base station;

a control unit configured to allocate transmission power of at least one Physical Uplink Control CHannel (PUCCH) and/or transmission power of at least one Physical Uplink Shared CHannel (PUSCH) in order to transmit at least one of the PUCCH and the PUSCH on two or more cells; and

a transmission unit configured to transmit at least one of the PUCCH and the PUSCH to at least one base station according to the allocated transmission power.

16. The user equipment as claimed in claim 15, wherein the control unit configured to allocate the transmission power based on at least one of i) whether the PUCCH or the PUSCH includes Uplink Control Information (UCI), ii) a type of the UCI, and iii) a number of the pieces of UCI.

17. The user equipment as claimed in claim 15, wherein:

the control unit is configured to allocate transmission power to a PUSCH of a first cell so that the transmission power of the PUSCH on the first cell is less than or equal to a first value; and

the first value is obtained by i) obtaining a second value by scaling transmission power of a PUCCH transmitted on the first cell using a scaling factor of the first cell and ii) subtracting the second value from total transmission power.

18. The user equipment as claimed in claim 15, wherein when one of cells has a PUSCH including UCI to transmit, the control unit is configured to prioritize the PUSCH including UCI over a PUSCH excluding UCI on the other cells and first allocate transmission power to the PUSCH including the UCI.

19. The user equipment as claimed in claim 15, wherein the reception unit is configured to receive, from the base station, a Radio Resource Control (RRC) configuration parameter as indication information indicating simultaneous uplink transmission on the two or more cells.

20. (canceled)