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.
Method for judging driving direction
13.01.2016
Patent
Elektronische Ressource
Englisch
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