A laser waveguide, where the laser waveguide can be formed by electrodes and at least one sidewall in a manner allowing a more compact structure than previously provided. The GPS satellite signal-receiver module acquires an abnormal status of vehicle message from the checking signal processing circuit, and via the satellite signal-receiving antenna receives vehicle position data. Moreover, the carrier is formed in a size or a shape not allowing the carrier to pass through the inletoutlet, and in a state of holding the carrier in the housing section, by self-weight of the carrier, frictional force between the carrier and the inner wall of the housing section, or remote force from outside with respect to the carrier, a fluid is drawn and discharged. This curve is shifted by a predetermined time corresponding to an additional delay over a relay path to produce a projected capacity curve for the relay path having a second capacity cost determined according to a combined measure of signal quality of multiple links in the relay path.