'Inconsistencies of the positions in a linear VEINS car flow

I am trying to monitor positions (X coordinate, it is horizontal) of vehicles in a linear flow.

In TraCIDemo11p::handlePositionUpdate method, I added current vehicle position (by getCurrentPosition().x) and vehicle id (by getExternalId()) to message data using,

wsm ->setWsmData (parameters) and sent it down via sendDown(wsm).

Then in TraCIDemo11p::onWSM(WaveShortMessage* wsm), those information is retrieved and added to a std::map which I use for my calculations.

However in an arbitary momnet during the simulation vehicle positions can be found like this (v0:439.60 v1:389.60 v2:339.60 v3:339.60 v4:289.60) in the map. This is because v2 has not updated its position after v3 updated its position. I would appreciate any advice on this to avoid this inconsistency.

Thank you.

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omnet++veinssumo


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