Mobile communication system and channel transmission/reception method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSeung Hoon Choi, Joon Young Cho, Jin Kyu Han, Young Bum Kim, Hyoung Ju Ji
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Abstract
A method and an apparatus for transmitting Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement/Negative Acknowledgement (ACK/NACK) are provided. The HARQ ACK/NACK transmission method includes receiving a Physical Downlink Shared Channel (PDSCH) in a subframe of a first cell, identifying an ACK subframe for transmitting HARQ ACK/NACK corresponding to the PDSCH, and transmitting the HARQ ACK/NACK in the identified ACK subframe of a second cell.
Claims12
A hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) transmission method of a terminal in a carrier aggregated system, the method comprising:
- receiving a downlink control information (DCI) including a carrier indicator field (CIF) on a physical downlink control channel (PDCCH) in a first cell, the CIF indicating a cell in which data is transmitted;
- receiving the data on a physical downlink shared channel (PDSCH) in the indicated cell;
- determining a subframe to transmit a HARQ ACK/NACK for responding to the data based on a timing relation of a transmission of the HARQ ACK/NACK for the first cell;
- and
- transmitting the HARQ ACK/NACK at the determined subframe in the first cell.
A hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) reception method of a terminal in a carrier aggregated system, the method comprising:
- transmitting a downlink control information (DCI) including a carrier indicator filed (CIF) on a physical downlink control channel (PDCCH) of a first cell, the CIF indicating a cell in which data is transmitted;
- transmitting the data on a physical downlink shared channel (PDSCH) in the indicated cell;
- determining a subframe to receive a HARQ ACK/NACK for responding to the data based on a timing relation of a transmission of the HARQ ACK/NACK for the first cell;
- and
- receiving the HARQ ACK/NACK responding to the data at the determined subframe in the first cell.
A terminal apparatus for transmitting a hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) in a carrier aggregated system, the apparatus comprising:
- a physical downlink control channel (PDCCH) receiving unit configured to receive a downlink control information (DCI) including a carrier indicator field (CIF) on a PDCCH in a first cell, the CIF indicating a cell in which data is transmitted;
- a physical downlink shared channel (PDSCH) receiving unit configured to receive the data on a PDSCH in the indicated cell;
- a cell/timing controller configured to determine a subframe to transmit a HARQ ACK/NACK for responding to the data based on timing relation of a transmission of the HARQ ACK/NACK for the first cell;
- and
- a physical HARQ indicator channel transmitting unit configured to transmit the HARQ ACK/NACK at the determined subframe in the first cell.
A base station apparatus for transmitting a hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) in a carrier aggregated system, the apparatus comprising:
- a physical downlink control channel (PDCCH) transmitting unit configured to transmit a downlink control information (DCI) including a carrier indicator filed (CIF) on a PDCCH in a first cell, the CIF indicating a cell in which data is transmitted;
- a physical downlink shared channel (PDSCH) transmitting unit configured to transmit the data on a PDSCH in the indicated cell;
- a cell/timing controller configured to determine a subframe to receive a HARQ ACK/NACK for responding to the data based on timing relation of a transmission of the HARQ ACK/NACK for the first cell;
- and
- a physical HARQ indicator channel transmitting unit configured to receive the HARQ ACK/NACK responding to the data at the determined subframe in the first cell.
Dependencies are inferred from the claim text.