Method for transmitting uplink data in wireless communication system and apparatus therefor

1. A method for transmitting and receiving, by a base station, urgent data in a wireless communication system supporting a low latency service, the method comprising:

receiving, from an urgent user equipment (UE), an urgent signal notifying occurrence of an event related to an urgent situation;

transmitting an indicator indicating a channel in which a response signal for notifying occurrence of the event is transmitted to the urgent UE and at least one general UE included in a cell;

based on the urgent signal, discarding an uplink (UL) grant generated for the general UE in order to preferentially allocate an UL grant for transmitting the urgent data to the urgent UE;

transmitting, to the at least one general UE, the response signal;

transmitting, to the at least one general UE, system information, based on the response signal being transmitted through the downlink control channel; and

receiving, from the urgent UE, the urgent data,

wherein the response signal is transmitted through a specific resource region of the downlink control channel, based on the indicator, and

wherein the system information includes information on (1) the specific resource region for the event, and (2) the indicator.

2. The method of claim 1 , wherein an index of each resource included in the specific resource region is mapped with the event.

3. The method of claim 1 , wherein a size of the specific resource region is determined by a number of events related to the urgent situation and a resource element allocated to each event of the number of events.

4. The method of claim 1 , wherein the size of the specific resource region is determined by a number of events related to the urgent situation and a control channel element (CCE) allocated to each event of the number of events.

5. The method according to claim 1 , wherein the specific resource region is positioned in one symbol of first to third orthogonal frequency division multiplexing (OFDM) symbols of a subframe.

6. The method of claim 1 , wherein the specific resource region is positioned next a physical control format indication channel (PCFICH) or a physical hybrid-ARQ indicator channel (PHICH) of the downlink control channel.

7. The method of claim 1 , wherein the response signal is transmitted through an on/off keying scheme or a common search space.

8. The method of claim 4 , wherein when the response signal is transmitted by the on/off keying scheme, 1-bit information is spread to four consecutive resource elements.

9. The method of claim 8 , wherein the spreading is repeated three times.

10. The method of claim 1 , further comprising:

transmitting, to the at least one general UE, information related to the event through a physical broadcast channel (PBCH).

11. The method of claim 1 , wherein when the response signal is transmitted through the downlink data channel, the response signal is included in an RRC message and transmitted.

12. The method of claim 11 , wherein the RRC message is transmitted by any one scheme of broadcast, unicast, and multi-cast transmission schemes.

13. The method of claim 12 , wherein when the RRC message is transmitted by the broadcast transmission scheme, the RRC message is transmitted only when the event occurs.

14. The method according to claim 12 , wherein when the RRC message is transmitted by any one scheme of the unicast and multi-cast transmission schemes, the RRC message is transmitted through a specific radio network temporary identifier (RNTI) for transmitting the response signal.

15. A base station for transmitting and receiving urgent data in a wireless communication system supporting a low latency service, the base station comprising:

a transceiver for transmitting and receiving a radio signal; and

a processor functionally coupled with the transceiver,

wherein the processor is configured to:

receive, from an urgent user equipment (UE), an urgent signal notifying occurrence of an event related to an urgent situation,

transmit an indicator indicating a channel in which a response signal for notifying occurrence of the event is transmitted to the urgent UE and at least one general UE included in a cell,

based on the urgent signal, discard an uplink (UL) grant generated for the general UE in order to preferentially allocate an UL grant for transmitting the urgent data to the urgent UE,

transmit, to the at least one general UE, the response signal,

transmit, to the at least one general UE, system information, based on the response signal being transmitted through the downlink control channel, and

receive, from the urgent UE, the urgent data,

wherein the response signal is transmitted through a specific resource region of the downlink control channel, based on the indicator, and

wherein the system information includes information on (1) the specific resource region for the event, and (2) the indicator.

16. The method of claim 1 , wherein the urgent signal is received on a subframe #n, the UL grant generated for the general UE is discard on a subframe #n+1.

17. The base station of claim 15 , wherein the urgent signal is received on a subframe #n, the UL grant generated for the general UE is discard on a subframe #n+1.