The present disclosure discloses a method and a device in a node for wireless communications. A first node judges whether the first node is in coverage; and then transmits Q second-type radio signals; herein, the Q second-type radio signals respectively comprise Q pieces of first-type information; whether each of the Q second-type radio signals can be selected as a synchronization reference is related to its comprised first-type information; the Q pieces of first-type information are independently generated, or, whether the Q pieces of first-type information are independently generated is related to whether the first node is in coverage, Q being a positive integer greater than 1. The present disclosure improves transmission reliability of Sidelink.