Communication system and communication method

Abstract

A communication system includes a transmission-side processing device, and a reception-side processing device, the transmission-side processing device and the reception-side processing device communicate using a plurality of communication lines, wherein the transmission-side processing device concurrently transmits the same telegraphic messages via each of the plurality of communication lines, and the reception-side processing device is capable of concurrently receiving telegraphic messages via each of the plurality of communication lines, and when a same telegraphic message as a previously received telegraphic message is received later, invalidates the same telegraphic message received later while processing the previously received telegraphic message.

Dependencies are inferred from the claim text.