Disclosed are a deinterlacing method and apparatus based on a motion-compensated interpolation and an edge-directional interpolation. The storage device stores: information associating, with first identification information identifying a first frame, information distinguishing a first port having been used as a destination port when the first node apparatus has transmitted the first frame; and information associating, with each node apparatus, state information indicating whether frame transmission from each port is feasible. The chamber includes a first contact plate, a second contact plate and a third contact plate on two ends faces thereof and forming a switch with a conductive ball.