Method and device for low power consumption timing wake-up

Abstract

The invention discloses a method and a device for low power consumption timing wake-up. The method comprises steps that a period enable signal is generated by a timing wake-up control module and is sent to a radio frequency module; a period of the period enable signal comprises an interception time Tmonitor and a dormancy time Tsleep; during the effective work time Te moment contained in the interception time Tmonitor of the period enable signal, external wake-up signals from the external part can be received by the radio frequency module, and a symptom signal corresponding to the received external wake-up signals is further sent to the timing wake-up control module, that the symptom signal and a set threshold satisfy preset output threshold conditions is determined by the timing wake-up control module, an internal wake-up signal is outputted by the timing wake-up control module to a system control module of a waken-up device. According to the method and the device, a certain wake-up distance is guaranteed, and average system power consumption is further greatly reduced.

Description

technical field [0001] The invention relates to the field of wake-up of active electronic equipment, in particular to a method and device for timing wake-up with low power consumption. Background technique [0002] In order to save power consumption, active electronic devices such as active RFID (radio frequency identification) electronic tags, OBU (on-board unit) and CPC (composite pass cards) in ETC (electronic toll collection) systems are dormant in most cases state. When there is a need for communication, the wake-up technology is used to wake up the active electronic equipment, so that it enters the working state from the dormant state. Existing wake-up methods mainly include two types: an external wake-up method and an internal wake-up method. [0003] External wake-up includes the following process: the external wake-up device transmits an external radio frequency wake-up signal of specific specifications to the wake-up device, such as 14 continuous 14KHz square wav...

AI Technical Summary

Problems solved by technology

At this time, it is difficult to meet the demand for wake-up distance by using external wake-up technology

Although the internal wake-up technology can satisfy a longer wake-up distance, the power consumption of the system is relatively large

Images