| 摘要 |
<p>The present invention relates to a method to control an on board unit (OBU) within a communication zone of a road side unit (RSU), said OBU can be set into an active mode (15) and a sleep mode (14), wherein the OBU is set into said sleep mode (14) when said OBU upon receiving a release command from said RSU, and the electronics of said OBU thereby is shut down, such that no or a minimum of power is consumed, and set into said active mode (15) when said OBU is entering said communication zone (4; 7). A communication unit of said OBU is thereby powered such that the OBU can communicate with said RSU. Said OBU can be set into a tracking mode (16) by said RSU, whereby in said tracking mode (16) at least said communication unit is shut down and a timer is activated in said OBU, such that said OBU can restart said communication unit within a specified time limit from it is shut down. The invention also relates to an onboard unit.</p> |
