Method of transmitting and receiving ACK/NACK signal and apparatus thereof
View Patent ↗Disclosed is a method for transmitting an ACK/NACK signal for an HARQ (Hybrid Automatic Repeat reQuest) in a CA (Carrier Aggregation) system, the method including obtaining at least one transmission resource among first and second transmission resources; configuring a first table showing a relationship in which a combination of at least one of the first and second transmission resources and modulation symbols is mapped to an ACK/NACK signal, and transmitting modulation symbols corresponding to a transmission target ACK/NACK signal in the first table by using transmission resource corresponding to the transmission target ACK/NACK signal in the first table.
1. A method for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) by a user equipment (UE), the method comprising:
configuring a first and second ACK/NACK resource sets based on a Radio Resource Control (RRC) signal;
receiving, from a base station (BS), an ACK/NACK resource indicator configured to indicate at least two ACK/NACK resources;
mapping, based on a channel selection, an ACK/NACK associated with a downlink data transmission onto a combination of at least one of the at least two ACK/NACK resources and a modulation symbol; and
transmitting, to the BS, the ACK/NACK by using the combination,
wherein if a value of the ACK/NACK resource indicator is ‘00’, the at least two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set, respectively;
is if the value of the ACK/NACK resource indicator is ‘01’, the at least two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set, respectively;
if the value of the ACK/NACK resource indicator is ‘10’, the at least two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set, respectively; and
if the value of the ACK/NACK resource indicator is ‘11’, the at least two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set, respectively.
2. The method of claim 1 , wherein the value of the ACK/NACK resource indicator is a 2-bit value of a transmission power control field (TPC), included in downlink control information (DCI) indicating the downlink data transmission on a secondary component carrier (SCC).
3. The method of claim 1 , wherein both of the first ACK/NACK resource set and the second ACK/NACK resource set include four ACK/NACK resource values which are configured by a higher layer signaling.
4. The method of claim 2 , wherein at least one of the at least two ACK/NACK resources is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and
wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.
5. The method of claim 2 , wherein if the downlink data transmission is for one transport block, the TPC field is configured to be used to indicate a single ACK/NACK resource which is included in the first ACK/NACK resource set.
6. The method of claim 2 , wherein if the downlink data transmission is for two transport blocks, the TPC field is configured to be used to indicate 2 ACK/NACK resources which are included in the first ACK/NACK resource set and the second ACK/NACK resource set, respectively.
7. A user equipment (UE) to transmit an acknowledgement/not-acknowledgement (ACK/NACK), the UE comprising:
a processor to configure a first and second ACK/NACK resource sets based on a Radio Resource Control (RRC) signal; and
a transceiver to receive, from a base station (BS), an ACK/NACK resource indicator configured to indicate at least two ACK/NACK resources,
wherein the processor is configured to map, based on a channel selection, an ACK/NACK associated with a downlink data transmission onto a combination of at least one of the at least two ACK/NACK resources and a modulation symbol,
wherein the transceiver transmits, to the BS, the ACK/NACK by using the combination, and
wherein if a value of the ACK/NACK resource indicator is ‘00’, the at least two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set, respectively;
if the value of the ACK/NACK resource indicator is ‘01’, the at least two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set, respectively;
if the value of the ACK/NACK resource indicator is ‘10’, the at least two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set, respectively; and
if the value of the ACK/NACK resource indicator is ‘11’, the at least two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set, respectively.
8. The UE of claim 7 , wherein the value of the ACK/NACK resource indicator is a 2-bit value of a transmission power control field (TPC), included in downlink control information (DCI) indicating the downlink data transmission on a secondary component carrier (SCC).
9. The UE of claim 7 , wherein both of the first ACK/NACK resource set and the second ACK/NACK resource set include four ACK/NACK resource values which are configured by a higher layer signaling.
10. The UE of claim 8 , wherein at least one of the at least two ACK/NACK resources is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and
wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.
11. The UE of claim 8 , wherein if the downlink data transmission is for one transport block, the TPC field is configured to be used to indicate a single ACK/NACK resource which is included in the first ACK/NACK resource set.
12. The UE of claim 8 , wherein if the downlink data transmission is for two transport blocks, the TPC field is configured to be used to indicate 2 ACK/NACK resources which are included in the first ACK/NACK resource set and the second ACK/NACK resource set respectively.
13. A method for receiving an acknowledgement/not-acknowledgement (ACK/NACK) by a base station (BS), the method comprising:
transmitting, to a user equipment (UE), an ACK/NACK resource indicator configured to indicate at least two ACK/NACK resources from among at least one ACK/NACK resource set configured by Radio Resource Control (RRC);
receiving, from the UE, an ACK/NACK associated with a downlink data transmission performed from the BS to the UE,
wherein if a value of the ACK/NACK resource indicator is ‘00’, the at least two ACK/NACK resources correspond to a first ACK/NACK resource value in the first ACK/NACK resource set and a first ACK/NACK resource value in the second ACK/NACK resource set, respectively;
if the value of the ACK/NACK resource indicator is ‘01’, the at least two ACK/NACK resources correspond to a second ACK/NACK resource value in the first ACK/NACK resource set and a second ACK/NACK resource value in the second ACK/NACK resource set, respectively;
if the value of the ACK/NACK resource indicator is ‘10’, the at least two ACK/NACK resources correspond to a third ACK/NACK resource value in the first ACK/NACK resource set and a third ACK/NACK resource value in the second ACK/NACK resource set, respectively; and
if the value of the ACK/NACK resource indicator is ‘11’, the at least two ACK/NACK resources correspond to a fourth ACK/NACK resource value in the first ACK/NACK resource set and a fourth ACK/NACK resource value in the second ACK/NACK resource set, respectively; and
wherein the ACK/NACK is received by using a combination of at least one of the at least two ACK/NACK resources and a modulation symbol, the ACK/NACK being mapped, based on a channel selection, onto the combination.
14. The method of claim 13 , wherein the value of the ACK/NACK resource indicator is a 2-bit value of a transmission power control field (TPC), included in downlink control information (DCI) indicating the downlink data transmission on a secondary component carrier (SCC).
15. The method of claim 13 , wherein both of the first ACK/NACK resource set and the second ACK/NACK resource set include four ACK/NACK resource values which are configured by a higher layer signaling.
16. The method of claim 14 , wherein at least one of the at least two ACK/NACK resources is associated with a physical uplink control channel (PUCCH) of a primary component carrier (PCC), and
wherein the DCI is included in a physical downlink control channel (PDCCH) of the SCC distinct from a PDCCH of the PCC.
17. The method of claim 14 , wherein if the downlink data transmission is for one transport block, the TPC field is configured to be used to indicate a single ACK/NACK resource which is included in the first ACK/NACK resource set.
18. The method of claim 14 , wherein if the downlink data transmission is for two transport blocks, the TPC field is configured to be used to indicate 2 ACK/NACK resources which are included in the first ACK/NACK resource set and the second ACK/NACK resource set, respectively.