Method for transceiving data in wireless communication system and apparatus for same

A method for transceiving DL data in a wireless communication system, the method performed by a user equipment (UE) comprising:

• receiving a first downlink (DL) grant from a base station;
• receiving first DL data from the base station based on the first DL grant;
• transmitting a Hybrid Automatic Repeat and reQuest (HARQ) response to the first DL data to the base station;
• receiving second DL data from the base station;
• and
• receiving indication information indicating whether the second DL data is HARQ data or Non-HARQ data,
• wherein the HARQ data is data which needs transmission/reception of an Acknowledgement (ACK) or a Negative Acknowledgement (NACK) for data received,
• wherein the Non-HARQ data is data which does not need transmission/reception of the ACK or the NACK for data received,
• wherein the indication information indicates the second DL data is Non-HARQ data, when the second DL data is emergency data that requires low latency,
• wherein the second DL data is processed by a Non-HARQ soft buffer of the UE or by a HARQ soft buffer of the UE,
• wherein the Non-HARQ soft buffer of the UE is only used to process the emergency data, and
• wherein the HARQ soft buffer of the UE is only used to process general data.

A user equipment (UE) for transceiving UL data in a wireless communication system, the UE comprising:

• a radio frequency (RF) unit configured to transceiver a radio signal;
• and
• a processor functionally connected to the RF unit and configured to:
• receive a first uplink (UL) grant from a base station,
• based on the first UL grant, simultaneously transmit first UL data to the base station and a first message for requesting resource allocation for transmission of emergency data that requires low latency,
• receive a Hybrid Automatic Repeat and reQuest (HARQ) response to the first UL data from the base station and a second UL grant,
• transmit, to the base station, second UL data, and
• transceive, with the base station, indication information indicating whether the second UL data is HARQ data or Non-HARQ data,
• wherein the HARQ data is data which needs transmission/reception of an Acknowledgement (ACK) or a Negative Acknowledgement (NACK) for data received,
• wherein the Non-HARQ data is data which does not need transmission/reception of the ACK or the NACK for data received,
• wherein the indication information indicates the second DL data is Non-HARQ data, when the second DL data is emergency data,
• wherein the second DL data is processed by a Non-HARQ soft buffer of the base station or by a HARQ soft buffer of the base station,
• wherein the Non-HARQ soft buffer of the base station is only used to process the emergency data, and
• wherein the HARQ soft buffer of the base station is only used to process general data.