Method for Transmitting Uplink Signals

1. A method for transmitting uplink signals, the method comprising: transmitting, by a user equipment, periodic control information on a Physical Uplink Control Channel (PUCCH) at a predetermined period; and when the user equipment operates in subframe bundling transmission mode where uplink data is transmitted using a predetermined number of consecutive subframes and when a time for transmission of the periodic control information collides with a time for transmission of the uplink data, dropping the transmission of the periodic control information and transmitting the uplink data except the periodic control information on a Physical Uplink Shared Channel (PUSCH), wherein the periodic control information includes at least one of a channel quality indication (CQI), a precoding matrix index (PMI), and a rank indication (RI).

2. The method of claim 1, wherein the predetermined number of consecutive subframes are 4 consecutive subframes along a time axis.

3. A user equipment of transmitting uplink signals, the user equipment comprising: a Radio Frequency (RF) unit; a processing unit operably connected to the RF unit; and a memory unit operably connected to the processing unit, wherein the processing unit is configured to control the RF unit to transmit a periodic control information through the RF unit on a Physical Uplink Control Channel (PUCCH) at a predetermined period; when the user equipment operates in subframe bundling transmission mode where a uplink data is transmitted using a predetermined number of consecutive subframes and when a time for transmission of the periodic control information collides with a time for transmission of the uplink data, the processing unit is configured to drop the periodic control information and to control the RF unit to transmit the uplink data except the periodic control information on a Physical Uplink Shared Channel (PUSCH), wherein the periodic control information includes at least one of a channel quality indication (CQI), a precoding matrix index (PMI), and a rank indication (RI).

4. The user equipment of claim 3, wherein the predetermined number of consecutive subframes are 4 consecutive subframes along a time axis.

5. A method of transmitting, by a user equipment, uplink signals, the method comprising: based on the user equipment being configured to be in subframe bundling mode, transmitting uplink data in each of multiple subframes; and based on a subframe for transmission of periodic control information being included in the multiple subframes for the transmission of the uplink data in the subframe bundling mode, dropping the transmission of the periodic control information in the subframe for the transmission of the periodic control information, wherein the periodic control information includes channel quality indication (CQI), precoding matrix index (PMI) or rank indication (RI).

6. The method according to claim 5, wherein dropping the transmission of periodic control information in the subframe for the transmission of the periodic control information, comprises: not multiplexing the periodic control information on a physical uplink shared channel (PUSCH) in the subframe.

7. The method according to claim 5, further comprising: transmitting the periodic control information on a physical uplink control channel (PUCCH) in the subframe for the transmission of the periodic control information, based on no uplink data to be transmitted in the subframe for the transmission of the periodic control information.

8. The method according to claim 5, further comprising: based on i) presence of the uplink data to be transmitted in the subframe for the transmission of the periodic control information and ii) the user equipment being not configured to be in the subframe bundling mode, transmitting the periodic control information with the uplink data on a physical uplink shared channel (PUSCH) in the subframe for the transmission of the periodic control information.

9. The method according to claim 5, further comprising: based on transmission of acknowledgement/negative acknowledgement (ACK/NACK) information being concurrent with the transmission of the uplink data in the subframe bundling mode, transmitting the ACK/NACK information with the uplink data on a physical uplink shared channel (PUSCH).

10. The method according to claim 5, further comprising: transmitting aperiodic CQI, PMI or RI on a physical uplink control channel (PUSCH) in a subframe for transmission of the aperiodic CQI, PMI or RI, despite the subframe bundling mode.

11. A user equipment configured to transmit uplink signals, the user equipment comprising: a processor; and a memory storing software codes that, when executed, cause the processor to perform operations comprising: based on the user equipment being configured to be in subframe bundling mode, transmitting uplink data in each of multiple subframes; and based on a subframe for transmission of periodic control information being included in the multiple subframes for the transmission of the uplink data in the subframe bundling mode, dropping the transmission of the periodic control information in the subframe for the transmission of the periodic control information, wherein the periodic control information includes channel quality indication (CQI), precoding matrix index (PMI) or rank indication (RI).

12. The user equipment according to claim 11, wherein dropping the transmission of periodic control information in the subframe for the transmission of the periodic control information, based on the subframe for the transmission of the periodic control information being included in the multiple subframes for the transmission of the uplink data in the subframe bundling mode, comprises: not multiplexing the periodic control information on a physical uplink shared channel (PUSCH) in the subframe for the transmission of the periodic control information.

13. The user equipment according to claim 11, wherein the operations further comprise: transmitting the periodic control information on a physical uplink control channel (PUCCH) in the subframe for the transmission of the periodic control information, based on no uplink data to be transmitted in the subframe for the transmission of the periodic control information.

14. The user equipment according to claim 11, wherein the operations further comprise: based on i) presence of the uplink data to be transmitted in the subframe for the transmission of the periodic control information and ii) the user equipment being not configured to be in the subframe bundling mode, transmitting the periodic control information with the uplink data on a physical uplink shared channel (PUSCH) in the subframe for the transmission of the periodic control information.

15. The user equipment according to claim 11, wherein the operations further comprise: based on transmission of acknowledgement/negative acknowledgement (ACK/NACK) information being concurrent with the transmission of the uplink data in the subframe bundling mode, transmitting the ACK/NACK information with the uplink data on a physical uplink shared channel (PUSCH).

16. The user equipment according to claim 11, wherein the operations further comprise: transmitting aperiodic CQI, PMI or RI on a physical uplink control channel (PUSCH) in a subframe for transmission of the aperiodic CQI, PMI or RI, despite the subframe bundling mode.

17. A method of receiving, by a base station, uplink signals, the method comprising: configuring a user equipment to be in subframe bundling mode; and based on the user equipment being configured to be in the subframe bundling mode, receiving, by the base station, uplink data of the user equipment in multiple subframes, wherein receiving, by the base station, the uplink data comprises: receiving the uplink data without periodic control information in a subframe for reception of the periodic control information, based on the subframe for reception of the periodic control information being included in the multiple subframes for the reception of the uplink data in the subframe bundling mode, and wherein the periodic control information includes channel quality indication (CQI), precoding matrix index (PMI) or rank indication (RI).

18. The method according to claim 17, further comprising: transmitting scheduling information regarding the uplink data to the user equipment.

19. The method according to claim 17, further comprising: configuring the user equipment to transmit the periodic control information.

20. The method according to claim 17, further comprising: receiving the periodic control information in the subframe for the reception of the periodic control information, based on the user equipment being not configured to be in the subframe bundling mode.

21. The method according to claim 17, further comprising: receiving the periodic control information on a physical uplink control channel (PUCCH) in the subframe for the reception of the periodic control information based on no uplink data to be received from the user equipment in the subframe for the reception of the periodic control information.

22. The method according to claim 17, wherein, based on i) presence of the uplink data to be received in the subframe for the reception of the periodic control information and ii) the user equipment being not configured to be in the subframe bundling mode, the periodic control information is received with the uplink data on a physical uplink shared channel (PUSCH) in the subframe for the reception of the periodic control information.

23. The method according to claim 17, wherein, based on reception of acknowledgement/negative acknowledgement (ACK/NACK) information being concurrent with the reception of the uplink data in the subframe bundling mode, the ACK/NACK information is received with the uplink data on a physical uplink shared channel (PUSCH).

24. A base station configured to receive uplink signals, the base station comprising: a processor; and a memory storing software codes that, when executed, cause the processor to perform operations comprising: configuring a user equipment to be in subframe bundling mode; and based on the user equipment being configured to be in subframe bundling mode, receiving uplink data of the user equipment in multiple subframes, wherein receiving, by the base station, the uplink data comprises: receiving the uplink data without periodic control information in a subframe for reception of the periodic control information, based on the subframe for reception of the periodic control information being included in the multiple subframes for the reception of the uplink data in subframe bundling mode, and wherein the periodic control information includes channel quality indication (CQI), precoding matrix index (PMI) or rank indication (RI).

25. The base station according to claim 24, wherein the operations further comprise: transmitting scheduling information regarding the uplink data to the user equipment.

26. The base station according to claim 24, wherein the operations further comprise: configuring the user equipment to transmit the periodic control information.

27. The base station according to claim 24, wherein the operations further comprise: receiving the periodic control information in the subframe for the reception of the periodic control information, based on the user equipment being not configured to be in the subframe bundling mode.

28. The base station according to claim 24, wherein the operations further comprise: receiving the periodic control information on a physical uplink control channel (PUCCH) in the subframe for the reception of the periodic control information based on no uplink data to be received from the user equipment in the subframe for the reception of the periodic control information.

29. The base station according to claim 24, wherein the operations further comprise: based on i) presence of the uplink data to be received in the subframe for the reception of the periodic control information and ii) the user equipment being not configured to be in the subframe bundling mode, receiving the periodic control information with the uplink data on a physical uplink shared channel (PUSCH) in the subframe for the reception of the periodic control information.

30. The base station according to claim 24, wherein the operations further comprise: based on reception of acknowledgement/negative acknowledgement (ACK/NACK) information being concurrent with the reception of the uplink data in the subframe bundling mode, receiving the ACK/NACK information with the uplink data on a physical uplink shared channel (PUSCH).