Method for multiplexing ACK/NACK response in wireless communication system, and apparatus therefor
Disclosed is a method for reporting, by a terminal, acknowledgement/negative acknowledgement (ACK/NACK) to a base station. Specifically, the method comprises the steps of: receiving, from a network, data signals for providing a plurality of broadcasting services during a preset subframe; generating, in subframe units, pieces of ACK/NACK information with respect to each of the data signals; bundling the pieces of ACK/NACK information; and reporting the bundled pieces of ACK/NACK information to the network from a single subframe.
1. A method for transmitting acknowledgement/negative acknowledgement (ACK/NACK) information by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a network, a first plurality of physical downlink shared channels (PDSCHs) on a plurality of transmission time intervals (TTIs);
obtaining a plurality of groups based on grouping the first plurality of the PDSCHs per the plurality of the TTIs,
wherein each group among the plurality of the groups comprises a second plurality of the PDSCHs included in the first plurality of the PDSCHs,
wherein each PDSCH among the second plurality of the PDSCHs carries information on a multicast service different from each other; and
in response to the first plurality of the PDSCHs, transmitting, to the network on one TTI, the ACK/NACK information with a bit sequence comprising a first plurality of bits,
wherein, in the bit sequence, a location of each bit among the first plurality of the bits is predetermined based on a criterion regarding the plurality of the TTIs,
wherein each bit among the first plurality of the bits is obtained based on applying bundling per the plurality of the groups,
wherein a logical AND operation is applied to a second plurality of bits obtained by the bundling,
wherein each bit among the second plurality of the bits is related to a respective PDSCH among the second plurality of the PDSCHs.
2. The method of claim 1 , further comprising receiving a higher layer signal comprising information for a resource to be used for reporting the ACK/NACK information to the network.
3. The method of claim 1 , further comprising receiving a plurality of control signals respectively scheduling one of the first plurality of the PDSCHs,
wherein each control signal among the plurality of the control signals comprises information for a type of a multicast service related to a PDSCH, scheduled by a respective one of the plurality of control signals, among the first plurality of the PDSCHs.
4. The method of claim 3 , wherein each of the control signals further comprises information on an order of the PDSCH, scheduled by a respective one of the plurality of control signals, among the first plurality of the PDSCHs.
5. The method of claim 1 , a bit among the second plurality of the bits comprises information on a negative ACK state or a discontinuous transmission (DTX) state based on failure of receiving downlink control information scheduling a PDSCH, related to the bit among the second plurality of the bits, among the second plurality of the PDSCHs.
6. The method of claim 1 , further comprising receiving a third PDSCH carrying information for a unicast service,
wherein the bit sequence further comprises a bit comprising information for ACK/NACK for the third PDSCH,
wherein, in the bit sequence, a location of the bit comprising information for the ACK/NACK for the third PDSCH is prior to a location of the first plurality of the bits.
7. The method of claim 6 , wherein the third PDSCH is received on a TTI among the plurality of the TTIs.
8. A user equipment (UE) for transmitting acknowledgement/negative acknowledgement (ACK/NACK) information in a wireless communication system, the UE comprising:
a memory; and
at least one processor coupled with the memory and configured to:
receive, from a network, a first plurality of physical downlink shared channels (PDSCHs) on a plurality of transmission time intervals (TTIs);
obtain a plurality of groups based on grouping the first plurality of the PDSCHs per the plurality of the TTIs,
wherein each group among the plurality of the groups comprises a second plurality of the PDSCHs included in the first plurality of the PDSCHs,
wherein each PDSCH among the second plurality of the PDSCHs carries information on a multicast service different from each other; and
in response to the first plurality of the PDSCHs, transmit, to the network on one TTI, the ACK/NACK information with a bit sequence comprising a first plurality of bits,
wherein, in the bit sequence, a location of each bit among the first plurality of the bits is predetermined based on a criterion regarding the plurality of the TTIs,
wherein each bit among the first plurality of the bits is obtained based on applying bundling per the plurality of the groups,
wherein a logical AND operation is applied to a second plurality of bits obtained by the bundling,
wherein each bit among the second plurality of the bits is related to a respective PDSCH among the second plurality of the PDSCHs.