FIRST COMMUNICATION DEVICE AND METHODS THEREIN, FOR SENDING ONE OR MORE CONTROL SIGNALS TO A SECOND COMMUNICATION DEVICE

摘要

A method performed by a first communication device (101) for sending one or more control signals to a second communication device (102). The first communication device (101) and the second communication device (102) operate in a wireless communications network (100). The first communication device (101) determines (901), during a first period, that a transmission medium is available for sending the one or more control signals to the second communication device (102). The first communication device (101) then sends (902), to the second communication device (102), the one or more control signals along with a discovery signal, via the transmission medium. The discovery signal and the one or more control signals are sent without data after the first period. The first period is shorter than a second period for determining that the transmission medium is available for sending the data.