The invention provides a method and system for judging a driving direction. The method comprises the following steps: step S1, a front-end device continuously sending a plurality of ranging messages to a correspondingly associated AP; step S2, the AP correspondingly associated with the front-end device correspondingly sending a plurality of reply ranging messages to the front-end device in a respective manner after receiving the plurality of ranging messages sent by the front-end device; step S3, computing the time difference between the time of sending the ranging message and the time of receiving the replay ranging message until the front-end device finishes the roam association with the next AP, and computing a plurality of distance values between the front-end device and the correspondingly associated AP; step S4, analyzing the plurality of distance values obtained through the front-end device, determining that the front-end device with constantly increased distance value is at a trail and the front-end device with constantly reduced distance value is at a headstock. The method provided by the invention has the beneficial effects that the driving direction is judged without using a signal of an automatic train monitoring system, the coupling degree with the PIS system is reduced, the operation is simpler and the judgment is more accurate.


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    Title :

    Method for judging driving direction


    Contributors:
    KOU YONGYUAN (author) / TENG YICHEN (author)

    Publication date :

    2016-01-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC





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