The present disclosure proposes a method of a first node which is capable of using multiple wireless channels, wherein one or more of the channels are occupied by the first node for its current transmission to a second node, the method comprising: sending an indication to the second node, to indicate the second node to transmit towards the first node on the one or more occupied channels in the period between the current transmission and the continuing transmission of the first node; and listening on each of one or more other channels in the multiple wireless channels in the period for the continuing transmission. With this method, the power leakage from the occupied channel(s) will not impact the judgement of the listening of the first node on the other channel(s) in that period.