The disclosure provides a method (400) for transmission coordination on a wireless backhaul path. The wireless backhaul path comprises at least a network node and its upstream node and downstream node. The method comprises, at the network node: determining (S410) a subframe allocation for transmissions to and from the network node; and transmitting (S420) to the downstream node an instruction to insert a Guard Period (GP) into a first subframe from the downstream node to the network node based on the determined subframe allocation, so as to avoid interference on the first subframe from a subframe immediately following the first subframe.