Method and device used for transmitting discovery reference signal on unlicensed band

The present invention relates to a method of configuring at least one device in a communication device of a wireless communication system to intercept a discovery reference signal on an unlicensed band. The method comprises the steps of using the communication device to send a control message to at least one device on a first carrier, wherein the control message indicates to transmit the discovery reference signal on the unlicensed band to a corresponding device on at least one second carrier, so that the corresponding device can intercept the discovery reference signal on the unlicensed band, and the at least one second carrier is located in the range of the unlicensed band. According to the method of the present invention, the device can be noticed to intercept the corresponding discovery reference signal on the unlicensed band at the accurate time and on the specific band via the first carrier, thereby facilitating reducing the monitoring complexity at the device end and improving the system performance. In addition, the present invention also relates to a device of configuring the device to intercept the discovery reference signal and a device used for intercepting the discovery reference signal on the unlicensed band.