A user profile for an online gaming service is created. A cantilever is disposed at the upper face of the planar waveguide, whereas a movable mirror for reflecting light passing through the input optical line A toward the output optical line B is secured to the leading end part of the cantilever. The switch forwards packets addressed to the mobile node to a current access point of the mobile node as well as to its destination access point in parallel based on the entries in the MAC learning table. The frequency correction loop generates a frequency offset signal based on a frequency difference between an oscillator reference frequency and frequency of a received signal.