METHOD AND DEVICE FOR TRANSMITTING ACK/NACK IN CARRIER AGGREGATING SYSTEM

摘要

The present invention relates to a method of transmitting an acknowledgement/not-acknowledgement (ACK/NACK) and a device for using such a method. According to the present invention, a cell-specific downlink-uplink setting for one of a plurality of serving cells and a reference UL-DL setting is received, an effective downlink sub-frame capable of actually receiving a data unit from one serving cell is determined based on the settings, and only an ACK/NACK for the effective downlink sub-frame is configured as a bit string and fed back.

主权项

1. A method of transmitting acknowledgement (ACK)/not-acknowledgement (NACK) of a user equipment configured with a plurality of serving cells, the method comprising:
receiving a cell-specific uplink (UL)-downlink (DL) configuration for a single serving cell among the plurality of serving cells, when the cell-specific UL-DL configuration is information which configures subframes in a frame of the single serving cell to a UL subframe or a DL subframe; receiving a reference UL-DL configuration for the single serving cell, when the reference UL-DL configuration is information which indicates an ACK/NACK transmission time by configuring the subframes in the frame to the UL subframe or the DL subframe; determining a valid DL subframe capable of actually receiving a data unit in the single serving cell on the basis of the cell-specific UL-DL configuration and the reference UL-DL configuration; and constructing only ACK/NACK for the valid DL subframe in a form of a bit-stream and feed-backing the bit-stream.