| 摘要 |
The present invention relates to a wireless communication system, and more particularly, to a method for transmitting a signal in an unlicensed band and an apparatus for same. In particular, disclosed in the present invention are a signal transmission method by which a base station transmits a signal in an unlicensed band, and a base station apparatus for same, the method comprising: the base station determining whether reception power having or exceeding a predetermined threshold value with respect to a licensed assisted access signal (LAA) of a different system is detected; setting an energy detection threshold as a first value or a second value, which is different from the first value, according to a determination result; and transmitting a downlink signal when power detected by sensing a carrier in the unlicensed band is lower than the energy detection threshold which has been set according to the determination result. |
