JPS6447141A - Node equipment for indefinite communication network - Google Patents

Abstract

PURPOSE:To obtain a node equipment of an indefinite communication network where the reduction in the throughput of the entire communication network is minimized by preventing the arrival of a message packet through a path of a port initialized by fixed bus. CONSTITUTION:A node equipment includes a switch gate 40, a control gate 50, a start control section 60, an end control section 70, an active signal sending section 200 and a fault storage section 210 and a sequence control section 90 controls the entire equipment. After a first-come input channel is identified from an input port 20, the presence of the input is detected for a period T2 after the period T1, an idle input port is connected to an output port 30, and the signal is transferred while interrupting the connection of the ports other than the identified input port. The arrival of the signal to the transferred input port is monitored, the port received within the period T2 is identified, the connection to the corresponding output port is interrupted and the port inputted after the period T2 is connected to the corresponding output port with priority after no input exists in the period T3 and all the other input ports are connected to all other corresponding output ports at least. Through the constitution above, the malfunction of the node due to a signal from the port with collision taken place is prevented.