Method and apparatus for reducing uplink transmission delay in wireless communication system using carrier aggregation

摘要

The present invention proposes a method of sending a UE the timing advance information per carrier group promptly and commanding preamble transmission, and activating secondary carriers in a wireless communication system supporting carrier aggregation technology using uplink transmission timings for the respective carrier groups. Through the present invention, the UE is capable of configuring the timing advance information of the carrier group promptly and activating the secondary carrier quickly, resulting in reduction of uplink transmission delay.

主权项

1. An uplink transmission method of a terminal in a wireless communication system supporting carrier aggregation technology with a primary cell and at least one secondary cell, the method comprising:
receiving a timing information for use in calculating timing advance of the at least one secondary cell; calculating the timing advance of the at least one secondary cell using the timing information; and transmitting uplink data by adjusting uplink timing according to the timing advance of the at least one secondary cell while a time alignment timer of the at least one secondary cell is running, wherein the timing information is received via a radio resource control (RRC) message for aggregating the at least one secondary cell to the primary cell.