Embodiments of the present disclosure provide methods, apparatuses and computer program for control signal transmission and reception. A method implemented at a network device comprises: determining a first period and a first plurality of candidate transmission opportunities within the first period, for transmitting a first control signal through a wireless channel; selecting a candidate transmission opportunity from the first plurality of candidate transmission opportunities within the first period; and transmitting the first control signal through the wireless channel to a terminal device using the selected candidate transmission opportunity. By virtue of the method, probability for a successful transmission of the first control signal can be increased.