Bridge unit, frame transfer method of the bridge unit and computer program for frame transfer

摘要

A location information management table 14 stores information on the location of the host both at present and prior to the movement. The host is movable based on the transmission address contained in the frame transmitted therefrom. The frame addressed to the host is transferred to the segment presently connected and to the segment that has been previously connected based on the table 14. Even though the host locates halfway among a plurality of segments, stable communication can be realized. When the host moves away from other segment toward the center of one segment, the frame is transferred to one segment at a time when the timer terminates its counting operation, thus deleting unnecessary traffic.