DSRC (dedicated short range communication) system vehicle-mounted terminal capable of sleeping intelligently and method for making DSRC system vehicle-mounted terminal sleep intelligently

Abstract

The invention provides a DSRC (dedicated short range communication) system vehicle-mounted terminal capable of sleeping intelligently and a method for making the DSRC system vehicle-mounted terminal sleep intelligently. The DSRC system comprises a vehicle-mounted terminal and RSUs (road side units); the vehicle-mounted terminal is arranged in a vehicle; the RSUs are arranged on two sides of the road; the vehicle-mounted terminal comprises a CPU (central processing unit), a minicell, a vehicle-mounted wireless communication module, a wake-up circuit and a sleep circuit; the vehicle-mounted wireless communication module is electrically connected with the CPU; and the CPU is used for controlling the sleep circuit to start so as to make the vehicle-mounted terminal enter the sleep state. The vehicle-mounted terminal is controlled strictly to enter the work state only when communicating normally with the RSUs, and the vehicle-mounted terminal is kept in the sleep state all the way in the periods including the wrong wake-up period. Compared with the method for making the DSRC system vehicle-mounted terminal sleep intelligently by adopting a hardware time in the prior art, the method has the advantage that more than 80% power to be consumed in excess reserved period can be saved.

Description

technical field [0001] The present invention relates to an automatic control device and an automatic control method thereof, in particular to a method for enabling a vehicle-mounted terminal of a Dedicated Short-Range Communication system to realize intelligent dormancy and a vehicle-mounted terminal implementing the method. Background technique [0002] At present, the Dedicated Short-Range Communication system represented by the Electronic Toll Collection system is being popularized on a large scale. The dedicated short-range communication DSRC system includes a vehicle-mounted terminal installed in the vehicle, and Road Side Units installed on both sides of the road. Taking the ETC system as an example, the original ETC system was limited to the field of non-stop electronic toll collection on expressways. With the popularization of the ETC system, the system has gradually developed into various value-added applications such as urban congestion charging, parking lot no...

AI Technical Summary

Problems solved by technology

However, in order to prevent false dormancy, the dormancy time set by the hardware timer in the prior art often has a relatively long margin.

Usually, the communication time between the vehicle-mounted terminal and the roadside unit RSU is about 200 milliseconds, and the time set by the hardware timer is 2 seconds, so that the vehicle-mounted terminal has 1800 milliseconds to consume electric energy needlessly. low, wasteful

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