PURPOSE: To quicken and facilitate the setting and revision of a communication path data in the case of communication by the contention system by sending a communication path data specific to its own terminal equipment to other terminal equipment.

CONSTITUTION: Each of radio transmitters-receivers MOD provided to a terminal equipment N is provided with a storage means M storing a communication path data and a terminal equipment number and each of radio transmitters- receivers MOD provided to a communication repeater R is provided with a storage means M storing a relay number. Each terminal equipment N is provided with the storage means M storing the communication path data and the communication path data stored in the storage means M is referenced in the case of generating a header. The communication path data is sent from an optional terminal equipment N via a radio transmission line when the correction of a path is required due to system start or addition of the terminal equipment N and the communication repeater R. Other terminal equipment N receiving the communication path data stores the communication path data to the storage means M.