| 摘要 |
In a mobile system for short-range communication, mobile units or vehicles are moving within the coverage area (1) of the system. Beacons (VB, RB) are arranged to communicate with the mobile units for obtaining and delivering information respectively to the mobile units for determining traffic situations, road situations and so forth in the coverage area. As beacons, virtual beacons (VB) are included which are in connection with at least one higher-level unit (NBLT). In the last-mentioned unit, the virtual beacons are represented in tables, preferably through information on access telephone numbers and positions of the virtual beacons in the system. <IMAGE> |
