CONTINUITY CONFIRMATION METHOD, CONTINUITY CONFIRMATION PROGRAM, COMMUNICATION DEVICE, AND CONTINUITY CONFIRMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide techniques for confirming continuity of an optical path on an optical network at a high speed and for lightening the processing load on a switch device and making the device compact.

SOLUTION: A start-point node 2a transmits a signaling message for securing a band resource for the end point of the optical path in the form of an optical signal (S3), and an end-point node 2c determines whether continuity of the band resource for the end point is normal based upon a reception state of the signaling message (S4), and transmits a signaling message to the start-point node 2a in the form of an optical signal (S5) when determining that the continuity is normal. The start-point node 2a determines whether continuity of a band resource for the start point in a continuity test section is normal (S6) based upon a reception state of the signaling message transmitted from the end-point node 2c, and transmits notice of normal continuity confirmation showing that the continuity is normal to the end-point node 2c (S7) when determining that the continuity is normal.

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