Method for controlling uplink transmission power and apparatus thereof

• US 10,178,626 B2
• Filed: 06/08/2017
• Issued: 01/08/2019
• Est. Priority Date: 11/08/2013
• Status: Active Grant

• Current Assignee: KT Corporation
• Original Assignee: KT Corporation
• Inventors: Noh, Minseok, Choi, Woo-jin
• Primary Examiner(s): Rego, Dominic
• Application Number:
  US15/617,137
• Publication Number:
  US 20170273030A1
• Time in Patent Office: 579 Days
• 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 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,

wherein the transmission power is determined according to a type of the UCI; and

wherein a priority used to determine the transmission power is differently determined according to the type of the UCI.

2. The method as claimed in claim 1, 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.

3. The method as claimed in claim 1, wherein the transmission power is determined according to i) whether one of the PUCCH and the PUSCH includes UCI, ii) the type of the UCI, and iii) a number of the pieces of UCI.

4. The method as claimed in claim 1, wherein a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) and a Scheduling Request (SR) have a higher priority than a Channel Quality Indicator (CQI).

5. 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.

6. The method as claimed in claim 1, 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.

7. The method as claimed in claim 1, wherein the transmission power is determined based on a priority assigned to the PUCCH including Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK).

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

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

a reception unit for receiving, from the user equipment, at least one Physical Uplink Control CHannel (PUCCH) and/or at least one Physical Uplink Shared CHannel (PUSCH), of which transmission power is controlled according to the indication information; and

a control unit for controlling the transmission unit and the reception unit,

wherein the transmission power is determined according to a type of the UCI; and

wherein a priority used to determine the transmission power is differently determined according to the type of the UCI.

9. The base station as claimed in claim 8, 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.

10. The base station as claimed in claim 8, wherein the transmission power is determined according to i) whether one of the PUCCH and the PUSCH includes UCI, ii) the type of the UCI, and iii) a number of the pieces of UCI.

11. The base station as claimed in claim 8, wherein a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) and a Scheduling Request (SR) have a higher priority than a Channel Quality Indicator (CQI).

12. The base station as claimed in claim 8, 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 base station as claimed in claim 8, 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 base station as claimed in claim 8, wherein the transmission power is determined based on a priority assigned to the PUCCH including Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK).