COMMUNICATION SYSTEM, COMMUNICATION DEVICE, PATH SWITCHING METHOD, AND PATH SWITCHING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a communication system and the like that can quickly achieve path switching intended by a user.SOLUTION: A communication system 1 comprises a plurality of communication units 5 and relay units 6 that perform connection by autonomous multi-hop type radio communication. A relay unit 6 wirelessly transmits a relay Hello frame including a relay flag and a maximum propagation hop number. A communication unit 5 includes: a routing table 32 storing a relay destination of data to a final destination per final destination; a radio communication unit 61 for transmitting data to a relay destination corresponding to the final destination referring to the routing table; an update unit 68A for updating the routing table such that a relay unit 6 having transmitted a frame becomes a first priority neighboring destination LD1 of the final destination when a relay Hello frame is received from the relay unit 6; and a control unit 68B for controlling radio transmission of the frame on the basis of the maximum propagation hop number within the relay Hello frame.