| 摘要 |
<p>A portable apparatus includes telecommunications circuitry operable to communicate on a wireless carrier system, and a slave device coupled to the telecommunications circuitry. The slave device is operable to i) receive a close-range, standard-protocol radio signal notification from a master device affixed to a vehicle, and ii) trigger the telecommunications circuitry to transmit a wireless carrier system notification of the event. The emergency event includes a change above a certain threshold magnitude of speed of the vehicle, a change above a certain threshold magnitude of acceleration of the vehicle, a change above a certain threshold magnitude of rate of acceleration of the vehicle, or deployment of an air bag.</p> |
