| 摘要 |
<p>A meter reading device (SM1) belonging to the communication network of a route A and to the communication network of a route B transmits, upon reception of a beacon request signal from an HEMS control device (HC1), both a beacon signal of the route A and a beacon signal of the route B. Alternatively, the meter reading device (SM1) transmits, upon reception of the beacon request signal, one of the beacon signal of the route A or the beacon signal of the route B, and transmits, only if no response signal has been received since that transmittal for a predetermined time, the beacon signal of the route different from the route of that transmitted beacon signal.</p> |
