The purpose of the invention is to facilitate mounting of a power receiving coil on a vehicle and also extend the allowable range of the positional shift of the power receiving coil with respect to a power supplying coil to prevent a power supply efficiency from lowering. One method includes advertising an output interface cost in a first direction over a first network segment between a source IP device and a destination IP device that is different from an output interface cost in advertised in a second direction over the first network segment. A power of a feedback signal from a second transfer function of the feedback path is estimated for a second section of the signal response, and a parameter of the signal processing device andor of the feedback suppression unit is adjusted on the basis of the estimated power. The MAC sublayer uses a CDMA system as an access system for thereby implementing a data structure in accordance with the kind and amount of information. The apparatus also preferably comprises at least one transfer mechanism for moving a cover relative to a microplate at a dispensing station.