Wireless communication method for online automatic automobile deviation test system

Abstract

The invention discloses a communication method for improving communication timeliness in an automobile deviation test system. The wireless communication timeliness and reliability are the premises for effectively performing deviation test, and however, in a strong interference environment, communication is interrupted easily, and the communication interruption would cause obvious communication delay. A time-sharing communication method lowers the influence caused by communication delay and greatly improves the communication timeliness in the strong interference environment, to be specific, the wireless communication method for the online automatic automobile deviation test system includes that changing a continuous communication method in a starting test process into the time-sharing communication method, wherein the time-sharing communication method includes idle hour communication and busy hour communication, and the idle hour communication refers to that the main information is sent in the tested vehicle information extracting stage featured with small interference and low timeliness requirement; in the test starting stage (busy hours) featured with large interference and high timeliness requirement, only the wireless communication connection is performed, and the corresponding vehicle identity information is called according to the client IP to verify the vehicle identity and perform activation test.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a wireless communication method for an automatic on-line test system for vehicle deviation. Background technique [0002] The vehicle deviation test belongs to the off-line detection, and the vehicles under the off-line detection often have the following two situations: 1. The vehicles driving on the off-line detection test track are inconsistent with the off-line sequence; The vehicle under test. Therefore, in order to avoid matching confusion in the test results (record the test results of car A on car B), during the start-up test, an "identity" verification needs to be performed before the tested vehicle enters the test area, that is, after the tested vehicle About 30m before entering the test area (that is, the test activation point), the hand-held wireless terminal carried by the vehicle sends the vehicle identification code VIN scanned in advance to the measurement an...

AI Technical Summary

Problems solved by technology

However, in the case of communication interruption or data packet loss, in order to ensure its reliability, the TCP / IP protocol automatically starts the congestion mechanism and timeout retransmission mechanism, and retransmits regularly, which will also make the transmission efficiency low.

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