| 摘要 |
<p>PURPOSE: A method and apparatus for supporting synchronous hybrid automatic repeat request transmission are provided to maintain an equal timing relationship between PUSCH(physical uplink shared channel) transmission of a Pcell(primary cell) and the following PUSCH retransmission of a Scell(secondary cell) by forming an HARQ(synchronous hybrid automatic repeat request) transmission timing relationship between the Pcell and the Scell. CONSTITUTION: A base station provides a configuration for operation of an UE(user equipment) in a CA mode(301). The UE recognizes predetermined signaling or the configuration of the base station. The base station transmits information of a PDCCH(physical downlink control channel) and/or a PHICH(physical hybrid ARQ indicator channel) in a Pcell(302). The base station receives data of the PUSCH in the Scell. The UE receives the PDCCH and/or the PHICH. The base station transmits the PHICH of the Pcell according to a timing relationship between the PHICH and the PUSCH(303). The base station receives a retransmission PUSCH in the Scell. The UE transmits the PHICH and retransmission data. [Reference numerals] (301) Configuration for an UE operation in a CA mode; (302) Transmission of a PDCCH and/or a PHICH in a Pcell and reception of a PUSCH in a Scell according to a timing relationship of the PDCCH and the PUSCH from the PHICH; (303) Transmission of the PDCCH in the Pcell according to the timing relationship of the PHICH and the PUSCH, reception of a retransmission PUSCH in the Scell according to the timing relationship of the PHICH and the PUSCH, and a timing relationship between a timing location of the retransmission PUSCH and a timing location preciously transmitted by an UE is the same as the timing relationship in LTE and LTE-A; (AA) Start; (BB) End</p> |
