Method for controlling uplink power in multi-subframe scheduling

1. A method for transmitting data by a user equipment (UE) in a wireless communication system, comprising:

receiving scheduling information from a base station;

identifying an uplink (UL) subframe u among a plurality of UL subframes scheduled by the scheduling information;

determining whether the UL subframe u is a first UL subframe, the first UL subframe being a first scheduled UL subframe among the plurality of UL subframes;

in case that the UL subframe u is not the first UL subframe, determining a first transmission power for a physical uplink shared channel (PUSCH) in the UL subframe u based on a first parameter representing a number of resource blocks for the UL subframe u, a second parameter related to a value for the PUSCH provided by higher layers based on a scheduling mode, a third parameter representing a coefficient for a path loss, a fourth parameter representing the path loss, a fifth parameter representing a value related to control data transmitted via the PUSCH, and a first power adjustment factor for a UL subframe (u−1) before the UL subframe u among the plurality of UL subframes;

selecting a transmission power among the first transmission power and a predetermined transmission power; and

transmitting data through the PUSCH in the UL subframe u based on the selected transmission power.

2. The method of claim 1 ,

wherein selecting the transmission power among the first transmission power and the predetermined transmission power comprises selecting a minimum transmission power among the first transmission power and the predetermined transmission power.

3. The method of claim 1 ,

wherein the predetermined transmission power is a maximum transmission power predetermined for the UE in the UL subframe u.

4. The method of claim 1 , further comprising:

in case that the UL subframe u is the first UL subframe, determining a second transmission power for the PUSCH in the UL subframe u based on the first parameter, the second parameter, the third parameter, the fourth parameter, the fifth parameter, and a second power adjustment factor for the UL subframe u, the second power adjustment factor being determined based on the first power adjustment factor and power control information included in the scheduling information;

selecting a transmission power among the second transmission power and the predetermined transmission power; and

transmitting the data through the PUSCH in the UL subframe u based on the transmission power selected among the second transmission power and the predetermined transmission power.

5. The method of claim 4 ,

wherein selecting the transmission power among the second transmission power and the predetermined transmission power comprises selecting a minimum transmission power among the second transmission power and the predetermined transmission power.

6. A user equipment (UE) in a wireless communication system, comprising:

a transceiver; and

at least one processor configured to:

control the transceiver to receive scheduling information from a base station,

identify an uplink (UL) subframe u among a plurality of UL subframes scheduled by the scheduling information,

determine whether the UL subframe u is a first UL subframe, the first UL subframe being a first scheduled UL subframe among the plurality of UL subframes,

in case that the UL subframe u is not the first UL subframe, determine a first transmission power for a physical uplink shared channel (PUSCH) in the UL subframe u based on a first parameter representing a number of resource blocks for the UL subframe u, a second parameter related to a value for the PUSCH provided by higher layers based on a scheduling mode, a third parameter representing a coefficient for a path loss, a fourth parameter representing the path loss, a fifth parameter representing a value related to control data transmitted via the PUSCH, and a first power adjustment factor for a UL subframe (u−1) before the UL subframe u among the plurality of UL subframes,

select a transmission power among the first transmission power and a predetermined transmission power; and

control the transceiver to transmit data through the PUSCH in the UL subframe u based on the selected transmission power.

7. The UE of claim 6 ,

wherein the at least one processor is further configured to select a minimum transmission power among the first transmission power and the predetermined transmission power.

8. The UE of claim 6 ,

wherein the predetermined transmission power is a maximum transmission power predetermined for the UE in the UL subframe u.

9. The UE of claim 6 , wherein the at least one processor is further configured to:

in case that the UL subframe u is the first UL subframe, determine a second transmission power for the PUSCH in the UL subframe u based on the first parameter, the second parameter, the third parameter, the fourth parameter, the fifth parameter, and a second power adjustment factor for the UL subframe u, the second power adjustment factor being determined based on the first power adjustment factor and power control information included in the scheduling information,

select a transmission power among the second transmission power and the predetermined transmission power, and

control the transceiver to transmit the data through the PUSCH in the UL subframe u based on the transmission power selected among the second transmission power and the predetermined transmission power.

10. The UE of claim 9 ,

wherein the at least one processor is further configured to select a minimum transmission power among the second transmission power and the predetermined transmission power.

11. A method for receiving data by a base station (BS) in a wireless communication system, comprising:

generating scheduling information by scheduling a plurality of uplink (UL) subframes;

transmitting the scheduling information to a user equipment (UE); and

receiving, from the UE, data transmitted through a physical uplink shared channel (PUSCH) based on one of a first transmission power and a predetermined transmission power in a UL subframe u among the plurality of UL subframes,

wherein the UL subframe u is not a first UL subframe, the first UL subframe being a first scheduled UL subframe among the plurality of UL subframes, and

wherein the first transmission power is determined for the PUSCH in the UL subframe u based on a first parameter representing a number of resource blocks for the UL subframe u, a second parameter related to a value for the PUSCH provided by higher layers based on a scheduling mode, a third parameter representing a coefficient for a path loss, a fourth parameter representing the path loss, a fifth parameter representing a value related to control data transmitted via the PUSCH, and a first power adjustment factor for a UL subframe (u−1) before the UL subframe u among the plurality of UL subframes.

12. The method of claim 11 ,

wherein one of the first transmission power and the predetermined transmission power is a minimum transmission power selected by the UE among the first transmission power and the predetermined transmission power.

13. The method of claim 11 ,

wherein the predetermined transmission power is a maximum transmission power predetermined for the UE in the UL subframe u.

14. The method of claim 11 , further comprising:

receiving, from the UE, data transmitted through the PUSCH based on one of a second transmission power and the predetermined transmission power in the UL subframe u,

wherein the UL subframe u is the first UL subframe,

wherein the second transmission power is determined for the PUSCH in the UL subframe u based on the first parameter, the second parameter, the third parameter, the fourth parameter, the fifth parameter, and a second power adjustment factor for the UL subframe u, and

wherein the second power adjustment factor is determined based on the first power adjustment factor and power control information included in the scheduling information.

15. The method of claim 14 ,

wherein one of the second transmission power and the predetermined transmission power is a minimum transmission power selected by the UE among the second transmission power and the predetermined transmission power.

16. A base station (BS) in a wireless communication system, comprising:

a transceiver; and

at least one processor configured to:

generate scheduling information by scheduling a plurality of uplink (UL) subframes, and

control the transceiver to:

transmit the scheduling information to a user equipment (UE), and

receive, from the UE, data transmitted through a physical uplink shared channel (PUSCH) based on one of a first transmission power and a predetermined transmission power in a UL subframe u among the plurality of UL subframes,

wherein the UL subframe u is not a first UL subframe, the first UL subframe being a first scheduled UL subframe among the plurality of UL subframes, and

wherein the first transmission power is determined for the PUSCH in the UL subframe u based on a first parameter representing a number of resource blocks for the UL subframe u, a second parameter related to a value for the PUSCH provided by higher layers based on a scheduling mode, a third parameter representing a coefficient for a path loss, a fourth parameter representing the path loss, a fifth parameter representing a value related to control data transmitted via the PUSCH, and a first power adjustment factor for a UL subframe (u−1) before the UL subframe u among the plurality of UL subframes.

17. The BS of claim 16 ,

wherein one of the first transmission power and the predetermined transmission power is a minimum transmission power selected by the UE among the first transmission power and the predetermined transmission power.

18. The BS of claim 16 ,

wherein the predetermined transmission power is a maximum transmission power predetermined for the UE in the UL subframe u.

19. The BS of claim 16 ,

wherein the at least one processor is further configured to control the transceiver to receive, from the UE, data transmitted through the PUSCH based on one of a second transmission power and the predetermined transmission power in the UL subframe u,

wherein the UL subframe u is the first UL subframe,

wherein the second transmission power is determined for the PUSCH in the UL subframe u based on the first parameter, the second parameter, the third parameter, the fourth parameter, the fifth parameter, and a second power adjustment factor for the UL subframe u, and

wherein the second power adjustment factor is determined based on the first power adjustment factor and power control information included in the scheduling information.

20. The BS of claim 19 ,

wherein one of the second transmission power and the predetermined transmission power is a minimum transmission power selected by the UE among the second transmission power and the predetermined transmission power.