Channel reservation method for unlicensed band communication, base station, and user terminal

Abstract

The present invention provides an uplink channel reservation method used in a mobile communication system supporting an unlicensed carrier, as well as a base station and a user terminal that execute the method. The method includes: assessing whether an unlicensed carrier resource is free; and sending a channel reservation signal over the assessed free unlicensed carrier resource. According to embodiments of the present invention, it is ensured that an unlicensed carrier resource remains free during the period from the time when an unlicensed carrier is assessed to be free to the time when an uplink license is issued and comes into effect.

Dependencies are inferred from the claim text.