Method for transmitting/receiving data in wireless communication system, and device for supporting same
The disclosure proposes a method for transmitting/receiving data in a wireless communication system and apparatus for supporting the same. Specifically, a method of transmitting an uplink data channel by a user equipment (UE) in a wireless communication system comprises receiving, from a base station, first downlink control information for scheduling an uplink data channel in an nth transmission time unit, receiving, from the base station, second downlink control information for scheduling an uplink data channel in an n+kth transmission time unit, and when information by the first downlink control information is inconsistent with information by the second downlink control information, transmitting an uplink data channel which is based on the first downlink control information to the base station, wherein the second downlink control information may be discarded by the UE.
1. A method for transmitting an uplink data channel by a user equipment in a wireless communication system, the method comprising:
receiving, from a base station, first downlink control information (DCI) for scheduling the uplink data channel in n-th subslot,
receiving, from the base station, second DCI for scheduling the uplink data channel in n+k-th subslot, and
wherein the first DCI and the second DCI comprise, respectively, at least one of information for a cyclic shift, information for a Interleaved Frequency Division Multiple Access (IFDMA) comb, information for resource allocation, information for a precoding, and/or a number of layers, regarding the uplink data channel, and
wherein, when at least one of the information for the cyclic shift, the information for the IFDMA comb, the information for the resource allocation, the information for the precoding, and/or the number of layers is inconsistent between the first DCI and the second DCI,
transmitting, to the base station, the uplink data channel based on the first DCI, and
wherein the second DCI is discarded by the user equipment.
2. The method of claim 1 , wherein the first DCI and the second DCI further comprise, respectively, information for a Demodulation Reference Signal (DMRS) pattern, regarding the uplink data channel.
3. The method of claim 2 , further comprising:
when the information for the DMRS pattern is inconsistent between the first DCI and the second DCI, transmitting an uplink data channel based on the first DCI to the base station, and
wherein the second DCI is discarded by the user equipment.
4. The method of claim 3 , wherein a DMRS pattern included in the first DCI represents that DMRS transmission for the uplink data channel in a first symbol of the n+k-th subslot, and wherein a DMRS pattern included in the second DCI does not represent that the DMRS transmission for the uplink data channel in a first symbol of the n+k-th sub slot.
5. The method of claim 2 , wherein a DMRS pattern included in the first DCI and a DMRS pattern included in the second DCI represent that DMRS transmission for the uplink data channel in a first symbol of the n+k-th subslot.
6. The method of claim 1 , wherein the k is one (1), and
wherein the n-th subslot is contiguously assigned with the n+k-th subslot.
7. The method of claim 1 , wherein the n-th subslot and the n+k-th subslot comprise, respectively, two or three Orthogonal Frequency Division Multiplexing (OFDM) symbols.
8. A user equipment for transmitting an uplink data channel in a wireless communication system, the user equipment comprising:
a transceiver for transmitting and receiving a radio signal; and
a processor operatively coupled to the transceiver,
wherein the processor is configured to control to:
receive, from a base station, first downlink control information (DCI) for scheduling the uplink data channel in n-th subslot,
receive, from the base station, second DCI for scheduling the uplink data channel in n+k-th subslot, and
wherein the first DCI and the second DCI comprise, respectively, at least one of information for a cyclic shift, information for a Interleaved Frequency Division Multiple Access (IFDMA) comb, information for resource allocation, information for a precoding, and/or a number of layers, regarding the uplink data channel, and
wherein, when at least one of the information for the cyclic shift, the information for the IFDMA comb, the information for the resource allocation, the information for the precoding, and/or the number of layers is inconsistent between the first DCI and the second DCI,
transmit, to the base station, the uplink data channel based on the first DCI, and
wherein the second DCI is discarded by the user equipment.
9. The user equipment of claim 8 , wherein the first DCI and the second DCI further comprise, respectively, information for a Demodulation Reference Signal (DMRS) pattern, regarding the uplink data channel.
10. The user equipment of claim 9 , wherein, when the information for the DMRS pattern is inconsistent between the first DCI and the second DCI, the processor controls to transmit an uplink data channel based on the first DCI to the base station, and
wherein the second DCI is discarded by the user equipment.
11. The user equipment of claim 10 , wherein a DMRS pattern included in the first DCI represents that DMRS transmission for the uplink data channel in a first symbol of the n+k-th subslot, and wherein a DMRS pattern included in the second DCI does not represent that the DMRS transmission for the uplink data channel in a first symbol of the n+k-th subslot.
12. The user equipment of claim 8 , wherein a DMRS pattern included in the first DCI and a DMRS pattern included in the second DCI represent that DMRS transmission for the uplink data channel in a first symbol of the n+k-th subslot.
13. A base station for receiving an uplink data channel in a wireless communication system, the base station comprising:
a transceiver for transmitting and receiving a radio signal; and
a processor operatively coupled to the transceiver,
wherein the processor is configured to control to:
transmit, to a user equipment, first downlink control information (DCI) for scheduling the uplink data channel in n-th subslot,
transmit, to the user equipment, second DCI for scheduling the uplink data channel in n+k-th subslot, and
wherein the first DCI and the second DCI comprise, respectively, at least one of information for a cyclic shift, information for a Interleaved Frequency Division Multiple Access (IFDMA) comb, information for resource allocation, information for a precoding, and/or a number of layers, regarding the uplink data channel, and
wherein, when at least one of the information for the cyclic shift, the information for the IFDMA comb, the information for the resource allocation, the information for the precoding, and/or the number of layers is inconsistent between the first DCI and the second DCI,
receive, from the user equipment, the uplink data channel based on the first DCI, and
wherein the second DCI is discarded by the user equipment.