This information processing system includes a plurality of information processing devices coupled via a multi-hop network, wherein each information processing device is provided with a first communication unit for sending and receiving a first packet including destination address information, and a second communication unit, which carries out communications at a higher frequency than the first communication unit and sends and receives a second packet including a payload, and each information processing device realizes power savings and efficient data transfer by starting up the second communication unit when the first communication unit receives the first packet.
