In an embodiment a wireless relay device comprises a receiver configured to receive signals from at least a first wireless device and a second wireless device, and to extract, from a signal received from the first wireless device, an indication of a path metric for a path from a source node to the first wireless device, and from a signal received from the second wireless device, an indication of a path metric for a path from the source node to the second wireless device; a processor configured to select, using the extracted indications, a path from the source node to the wireless relay device and to determine a path metric for the selected path; a memory configured to store the path metric for the selected path; and a transmitter configured to transmit an indication of the path metric for the selected path to a third wireless device.