| 主权项 |
1. A method of performing a Hybrid Automatic Repeat reQuest (HARQ) operation by a user equipment (UE), 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, and a TDD uplink(UL)-downlink(DL) configuration of the first serving cell being one of 1, 2, 3, 4, and 5; receiving an RRC message from the base station 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, and the first serving cell and the second serving cell being aggregated by a TDD-FDD CA scheme; determining a maximum number of DL HARQ processes for the second serving cell, the maximum number of DL HARQ processes for the second serving cell being differently determined according to a DL reference timing; and storing soft channel bits for a received transport block (TB) based on the determined maximum number of DL HARQ processes for the second serving cell. |
