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) for a Hybrid Automatic Repeat reQuest (HARQ) by a user equipment (UE) in a carrier aggregation (CA) system, the method comprising:
receiving, from a base station (BS), downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating at least two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively configured by a higher layer, wherein n is an integer;
mapping, based on a channel selection, an ACK/NACK in response to the downlink data transmission onto a combination of one of the two ACK/NACK resource and a modulation symbol; and
transmitting, to the BS, the ACK/NACK by using the combination.
2. 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, and n is an integer between 1 and 4.
3. The method of claim 1 , wherein if the 2 bits are ‘00’, the 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 2 bits are ‘01’, the 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 2 bits are ‘10’, the 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 2 bits are ‘11’, the 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.
4. The method of claim 1 , wherein at least one of the 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. A user equipment (UE) for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARD) in a carrier aggregation (CA) system, the UE comprising:
a transceiver to receive, from a base station (BS), downlink control information (DCI) controlling downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively, wherein n is an integer; and
a signal processor to map, based on a channel selection, an ACK/NACK in response to the downlink data transmission onto a combination of one of the two ACK/NACK resources and a modulation symbol,
wherein the transceiver transmits, to the BS, the ACK/NACK by using the combination.
6. The UE of claim 5 , wherein if the 2 bits are ‘00’, the 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 2 bits are ‘01’, the 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 2 bits are ‘10’, the 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 2 bits are ‘11’, the 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.
7. The UE of claim 5 , wherein at least one of the two ACK/NACK resource 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.
8. A method for receiving an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARD) by a base station (BS) in a carrier aggregation (CA) system, the method comprising:
configuring downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively, wherein n is an integer;
transmitting the DCI to a user equipment (UE); and
receiving, from the UE, an ACK/NACK in response to the downlink data transmission,
wherein the ACK/NACK is mapped, based on a channel selection, onto a combination of one of the two ACK/NACK resources and a modulation symbol, and the ACK/NACK is received by using the combination.
9. The method of claim 8 , wherein if the 2 bits are ‘00’, the 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 2 bits are ‘01’, the 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 2 bits are ‘10’, the 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 2 bits are ‘11’, the 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.
10. A base station (BS) for receiving an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARQ) in a carrier aggregation (CA) system, the BS comprising:
a signal processor to configure downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively, wherein n is an integer; and
a transceiver to transmit the DCI to a user equipment (UE) and to receive an ACK/NACK in response to the downlink data transmission from the UE,
wherein the ACK/NACK is mapped, based on a channel selection, onto a combination of one of the two ACK/NACK resources and a modulation symbol, and the ACK/NACK is received by using the combination.
11. The BS of claim 10 , wherein if the 2 bits are ‘00’, the 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 2 bits are ‘01’, the 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 2 bits are ‘10’, the 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 2 bits are ‘11’, the 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.
12. The BS of claim 10 , wherein at least one of the two ACK/NACK resource 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.
13. The method of claim 8 , 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, and n is an integer between 1 and 4.
14. The method of claim 13 , wherein at least one of the 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.
15. The BS of claim 10 , 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, and n is an integer between 1 and 4.