METHOD AND APPARATUS FOR PERFORMING HARQ IN CARRIER AGGREGATION SYSTEM

摘要

Provided are an apparatus and a method for executing an uplink hybrid automatic repeat request (HARQ) in a carrier aggregation system. The method transmits data to a base station from an uplink subframe of a second cell, and receives, from the base station, an acknowledgement/not-acknowledgement (ACK/NACK) or scheduling information for the data from a downlink subframe of a first cell, wherein if the timing relationship between the uplink subframe of the second cell and the downlink subframe of the first cell does not match the timing relationship for when the first cell is being used exclusively, then the scheduling information is received from the downlink subframe of the first cell.

主权项

1. A method for performing Hybrid Automatic Repeat reQuest (HARQ) of a user equipment in a carrier aggregation system, comprising:
transmitting data from a uplink subframe of a second cell to a base station; and receiving ACK/NACK (acknowledgement/not-acknowledgement) about the data from a downlink subframe of a first cell or scheduling information from the base station, wherein a downlink subframe of the first cell receives the scheduling information if a timing relationship between uplink subframe of the second cell and a downlink subframe of the first cell does not coincide with a timing relationship when the first cell is used alone.