An example communication system, including: a plurality of devices that form a mesh-type network, each of the plurality of devices performing communication from a source device to a destination device, directly or by relaying via one or more other devices, and at least one of the plurality of devices including a selecting unit, that selects a communication route from the source device to the destination device according to a first restriction with regard to a relay value indicative of the number of communication routes that each device is able to relay.