Method and apparatus for receiving ACK/NACK in wireless communication system
AssigneeLG Electronics Inc.
InventorsDong Youn Seo, Han Byul Seo, Suck Chel Yang, Joon Kui Ahn
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Abstract
Provided are a method and an apparatus for a user equipment, which is allocated a plurality of serving cells, receiving acknowledgement/negative acknowledgement (ACK/NACK) in a wireless communication system. The method comprises: transmitting uplink data through a physical uplink shared channel (PUSCH); and receiving ACK/NACK with respect to the uplink through a physical hybrid-ARQ indicator channel (PHICH), wherein a serving cell that receives the ACK/NACK is selected from one or more serving cells, which the user equipment monitors to detect an uplink grant that schedules the PUSCH.
Claims6
A method of receiving positive acknowledgement/negative-acknowledgement (ACK/NACK) information by a user equipment (UE) in a carrier aggregation system including a first serving cell and a second serving cell comprising:
- transmitting, to a base station by using the first serving cell or the second serving cell, uplink data through a physical uplink shared channel (PUSCH);
- and
- receiving, from the base station by using the first serving cell or the second serving cell, the ACK/NACK information for the uplink data through a physical hybrid automatic repeat request indicator channel (PHICH), wherein the PHICH is a control channel for carrying ACK/NACK information in response to uplink transmission,
- wherein:
- i) based on the UE transmitting, to the base station, first uplink data through a PUSCH of a uplink component carrier N1 (UL CC N1) based on a first uplink grant received through an enhanced physical downlink control channel (EPDCCH) of a downlink component carrier N1 (DL CC N1), ACK/NACK information for the first uplink data is received, from the base station, through a PHICH of the DL CC N1, wherein the EPDCCH is a control channel located in a data region and the DL CC N1 and the UL CC N1 configures the first serving cell, and
- ii) based on the UE transmitting, to the base station, second uplink data through a PUSCH of a UL CC N2 based on a second uplink grant received through the EPDCCH of the DL CC N1, ACK/NACK information for the second uplink data is received, from the base station, through a PHICH of the DL CC N1, wherein a DL CC N2 and the UL CC N2 configures the second serving cell, and the N1 and the N2 are different integers.
A user equipment (UE) in a carrier aggregation system including a first serving cell and a second serving cell, the UE comprising:
- a transceiver for transmitting and receiving a radio signal;
- and
- a processor operatively coupled to the transceiver,
- wherein the processor is configured to:
- transmit, to a base station by using the first serving cell or the second serving cell, uplink data through a physical uplink shared channel (PUSCH), and
- receive, from the base station by using the first serving cell or the second serving cell, positive acknowledgement/negative-acknowledgement (ACK/NACK) information for the uplink data through a physical hybrid automatic repeat request indicator channel (PHICH), wherein the PHICH is a control channel for carrying ACK/NACK information in response to uplink transmission,
- wherein:
- i) based on the UE transmitting, to the base station, first uplink data through a PUSCH of a uplink component carrier N1 (UL CC N1) based on a first uplink grant received through an enhanced physical downlink control channel (EPDCCH) of a downlink component carrier N1 (DL CC N1), ACK/NACK information for the first uplink data is received, from the base station, through a PHICH of the DL CC N1, wherein the EPDCCH is a control channel located in a data region and the DL CC N1 and the UL CC N1 configures the first serving cell, and
- ii) based on the UE transmitting, to the base station, second uplink data through a PUSCH of a UL CC N2 based on a second uplink grant received through the EPDCCH of the DL CC N1, ACK/NACK information for the second uplink data is received, from the base station, through a PHICH of the DL CC N1, wherein a DL CC N2 and the UL CC N2 configures the second serving cell, and the N1 and the N2 are different integers.
Dependencies are inferred from the claim text.