| 摘要 |
<p>A communication navigation apparatus (102) predicts a planned en route point that may deviate from a guidance route and previously connects a communication line for connection with a communication server (101). For example, when current waypoint information (P) is positioned on a link (L2), the apparatus extracts a node (V2) as en route point information and connects a communication line with the communication server (101). If the current waypoint information (P) is positioned on a link (L3) after the apparatus passes the node (V2), it means that the apparatus is not deviated from a guidance route corresponding to guidance route information (R), so that it cuts the connected communication line. On the other hand, if the current waypoint information (P) is positioned on a link (L3a) after the apparatus passes the node (V2), it means that the apparatus has deviated from the guidance route corresponding to guidance route information (R), and the apparatus acquires new guidance route information (r) from the communication server (101).</p> |
