Communication control method, a network system, and a communication device

【Task】 The number of retransmission processing in the packet transmission process, each node is intended to set autonomously. A Communication device, to one or each of the plurality of communication devices connected to the own device, transmits the destination has been set packet, the path to the one or the destination through each of the plurality of communication devices among them, based on the number of paths a response to the packet from the destination, a process for determining a number of retransmissions of the transmission of other packets to the destination.