Bluetooth data information transmission method between mobile phone and OBU

Abstract

The invention provides a Bluetooth data information transmission method between a mobile phone and an OBU, and the method comprises the steps: firstly carrying out the subpackaging of data information, setting the data information needing to be transmitted at present as an ith packet, and setting the delay time; acquiring and sending the ith packet of data information; enabling the system to judgewhether the ith packet of data information is successfully sent to the OBU or not; if the data information is not successfully sent to the OBU, ending the data sending and calling back a failure result, and ending; if the data information is successfully sent to the OBU, enabling the system to call back a successful sending result; judging whether the ith packet is the last packet of data information; if the ith packet is not the last packet of data information, waiting for the delay time, then acquiring the (i+1)th packet of data information, and repeating the second step of operation; if the data information is last packet of data information, ending data sending, calling back the success result, and ending. According to the Bluetooth data information transmission method between the mobile phone and the OBU, repeated transmission caused by Bluetooth data protocol stack data refreshing delay is avoided under the conditions that system resources of the mobile phone are in shortage andthe priority of a data transmission thread falls behind.

Description

technical field [0001] The invention relates to a detection system of an OBU, in particular to a method for transmitting bluetooth data information between a mobile phone and an OBU. Background technique [0002] ETC: (Electronic Toll Collection) non-stop toll collection system is the most advanced road and bridge toll collection method in the world at present, through the special microwave short-range between the vehicle electronic tag installed on the vehicle windshield and the microwave antenna on the ETC lane of the toll station Communication, deducting the amount on the user card or using computer networking technology to carry out background settlement processing with the bank, so as to achieve the purpose of paying road and bridge tolls without stopping when vehicles pass through road and bridge toll stations. ETC is an advanced electronic toll collection technology. At the ramp entrance and exit and the main line sign station, both are ETC application models in the c...

AI Technical Summary

Problems solved by technology

[0006] When the resources of the mobile phone are sufficient and the threads of the mobile app are running well, such as figure 2 As shown, the existing technology adopts the general continuous sending of multiple packets of data, and will not generate repeated sending of data (repeated sending of data refers to: the data currently sent is not successfully sent, but the data of the previous packet is sent, resulting in repeated sending of data , but the current data to be sent is not sent)

[0007] However, when the mobile phone resources are insufficient, there are too many app threads to switch, and the priority of the thread that sends data or refreshes data is not the highest, the above-mentioned problem of repeatedly sending data will appear. The reason for the above-mentioned problem of repeatedly sending data is mainly to refer to image 3 , image 3 The seventh step is executed after the sixth step, and the event time of the result response does not include the seventh step. The execution time of the seventh step is affected by system resources and thread priorities, resulting in the data protocol stack not being refreshed next time. The data generates the action of sending data, causing the action of sending the current data to send the previous packet of data

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