Priority-based embedded equipment time service method

Abstract

The invention discloses a priority-based embedded equipment time service method, which comprises the steps of: setting a GPS time service priority to be P1, a GSM time service priority to be P2 and NTP time service priority to be P3; initiating operation in the three time service modes when embedded equipment boots up, and storing current UTC time into an embedded RTC chip when any of the time service modes obtains UTC time in a prioritized manner as long as the RTC chip is not subjected to a time service action by means of a time service method with a higher priority; and stopping the acquisition of time service data immediately for a time service request with a low priority if a time service source obtains the UTC time by means of a time service source with a higher priority, and stopping the whole time service strategy after the time service source with the higher priority obtains the time. The priority-based embedded equipment time service method enables the embedded equipment to obtain the time service time with the highest time accuracy degree quickly after booting, is conductive to maintaining synchronization of mutual communication between the Internet of Things equipment, and provides a reliable time basis for the event recording of the equipment.

Description

technical field [0001] The invention belongs to the technical field of timing methods for embedded devices, and in particular relates to a priority-based timing method for embedded devices. Background technique [0002] With the rapid development of the Internet of Things and the Internet of Vehicles technology, communication terminals have higher and higher requirements for real-time performance. The timed equipment can ensure that the remote terminals are kept in sync. At the same time, the timed equipment can provide timing basis for restoring the site. At present, the timing principle of embedded products on the market mainly adopts the method of GPS. The timing method of this method is relatively simple, and it is easily affected by factors such as weather and environment. [0003] There are currently three timing methods on the market, namely GPS, GSM and NTP. GPS timing is characterized by high real-time performance and relatively small delay during data transmission...

AI Technical Summary

Problems solved by technology

GPS timing is characterized by high real-time performance and relatively small delay during data transmission; the disadvantage is that GPS signals are easily affected by weather and the environment, and sometimes the positioning time is long or the positioning fails.

GSM timing is characterized by relatively high real-time performance and small delay during data transmission; the disadvantage is that GSM timing is subject to GSM network operators, and some mobile communication operators do not provide GSM timing services

NTP time service is characterized by high real-time time, but subject to the signal strength of GPRS network, the network delay is long

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