LAN INTERFACE DEVICE AND METHOD FOR CONTROLLING FRAME TRANSMISSION AND RECEPTION

摘要

PROBLEM TO BE SOLVED: To guarantee a QoS by attempting the collision avoidance of frames in the LAN of a CSMA/CD system. SOLUTION: When a terminal 1 transmits a frame FRM onto a transmission line 4, the next frame transmission timing information NFT is added to the frame FRM. All terminals 2 and 3 in the same segment reserve the next frame transmission timing information NFT added to the frame FRM as frame transmission timing (another terminal transmission) Ar from another terminal at timing reservation management tables 6 and 7 and inhibit frame transmission for their own terminals at reservation timing. The terminal 1 also reserves the transmission timing (self-terminal transmission) As of the next frame to be transmitted from the self-device at a timing reservation management table 5 and transmits the next frame to the line 4 when the next frame transmission timing arrives.