Method for controlling uplink transmission power and apparatus thereof
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.
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).