REPEATER AND RELAYING METHOD

PROBLEM TO BE SOLVED: To provide a repeater and a repeating method by which the reliability of a system constituted of processors which communicate with each other is improved. SOLUTION: A device monitoring node 1d, when only communication parts 1a1 and 1b2 are broken down, makes control parts 1a3 and 1b3 execute processings for establishing a communication route using a mutual connection route 1c and makes communication part 1a2 and 1b1 and the control parts 1a3 and 1b3 perform relaying of communication between a high-order device 2 and a lower-order device 3. In addition, the device monitoring node 1d, when only communication parts 1b1 and 1a2 are broken down, makes the control parts 1a1 and 1b3 execute processing for establishing the communication route by using the mutual connection route 1c and makes the communication parts 1a1 and 1b2 and the control parts 1a3 and 1b3 perform repeating of the communication between the higher-order device 2 and the lower-order device 3. COPYRIGHT: (C)2009,JPO&INPIT