A communication method in a wireless network is provided. The method includes, during the transmission of a data block from a source node to a destination node, the following steps: a node, having stored a set of segments of the block, selects a first adjacent node; determines an appropriate segment size for a transfer to the first adjacent node; reformats at least one segment from the set of segment(s) based on the determined segment size; and sends at least the reformatted segment to the first determined adjacent node; the method being characterized in that the node detects a modification of the links between the node and its adjacent nodes, and following that detection, selects a second adjacent node, stops the transmission to the first adjacent node of the set of segments stored before the detection, determines an updated appropriate segment size for a transfer to the second determined adjacent node, reformats at least one segment from the set of segment(s) not yet transmitted to the first adjacent node based on the updated size and transmits the at least one reformatted segment to the second adjacent node.