METHOD AND APPARATUS OF TRANSMITTING CONTROL INFORMATION CONSIDERING TDD-FDD CA

摘要

The present disclosure relates to an apparatus and method for configuring a DCI format for a TDD-FDD CA environment and an FDD-TDD CA environment. According to aspects, an HARQ process number field, a DAI filed in a downlink DCI format, and a DAI field in an uplink DCI format are differently configured for the TDD-FDD CA environment and the FDD-TDD CA environment.

主权项

1. A method of transmitting control information from a base station to a user equipment (UE), the method comprising:
establishing a Radio Resource Control (RRC) connection with the UE through a first serving cell, the first serving cell supporting a Time Division Duplex (TDD) mode; transmitting an RRC message to the UE 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; configuring a downlink (DL) downlink control information (DCI) format for indicating a Physical Downlink Shared Channel (PDSCH) transmission on the second serving cell, a 4-bit Hybrid Automatic Repeat reQuest (HARQ) process number field and a 2-bit DL downlink assignment index (DAI) field being configured in the DL DCI format; and transmitting, to the UE, at least one of a Physical Downlink Control Channel (PDCCH) and an Enhanced PDCCH (EPDCCH), the at least one of the PDCCH and the EPDCCH comprising the DL DCI format.