| 主权项 |
1. A method of transmitting a Hybrid Automatic Repeat reQuest (HARQ) response in a wireless communication system, the method comprising:
establishing a Radio Resource Control (RRC) connection with a base station through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode; receiving, at a user equipment (UE), an RRC message through the first serving cell, the RRC message comprising carrier aggregation (CA) configuration information, the CA configuration information comprising information of a second serving cell supporting a Frequency Division Duplex (FDD) mode, the first serving cell and the second serving cell being aggregated by a TDD-FDD CA scheme, and the second serving cell being configured for the UE according to a self-scheduling scheme; determining a downlink (DL) reference timing for transmitting an HARQ response signal based on information received through the first serving cell, the HARQ response signal being responsive to a Physical Downlink Shared Channel (PDSCH) transmission through the second serving cell; receiving, at the UE, a Physical Downlink Control Channel (PDCCH) transmission or an Enhanced PDCCH (EPDCCH) transmission through the second serving cell; recognizing, from the PDCCH or the EPDCCH, a 2-bit uplink (UL) downlink assignment index (DAI) field configured in a UL downlink control information (DCI) format, the UL DCI format indicating a Physical Uplink Shared Channel (PUSCH) transmission on the second serving cell, and the 2-bit UL DAI field indicating the number of PDSCHs scheduled in downlink subframes associated with one uplink subframe of the second serving cell; receiving, at the UE, the PDSCH transmission through the second serving cell; generating an HARQ response signal based on the number of PDSCHs scheduled in the downlink subframes indicated by the UL DAI field and the number of total downlink subframes associated with the one uplink subframe the HARQ response signal being generated in association with PUCCH format 3 if the number of total downlink subframes associated with the one uplink sub frame is 5 or 6; and transmitting the HARQ response signal through a PUSCH in the one uplink subframe. |
