Plexe-Vein and OMNET++

[Carolina]

Hello,

I am the newbie of plexe-vein. Can anyone here advise me in plexe-vein how to create different networks for different platoon but using the same communication channel? How can we find the communication range in the plexe?

[Michele Segata]

Dear Carolina,

What do you mean by "different networks but using the same communication
channel"? If you use the same communication channel, the only thing you
can do is a "logic" separation, for example by using the id of the
leader to identify your "logic network". Clearly, the lower level
network is the same, so platoon vehicles will contend for the same
channel and interfere with each other.

W.r.t. the communication range, there is no deterministic communication
range. The communication range depends on the parameters you choose,
including transmission power, frequency, modulation and coding scheme,
path loss and channel models, interference, and so on. In addition, the
communication range is time-varying, and it is probabilistic. There is
no "hard" boundary saying "at distance X I receive a packet, at distance
Y I don't", as packets are received with a probability described by bit
error rate models.

Best,
Michele

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Michele Segata, PhD
Department of Information Engineering and Computer Science
University of Trento, Italy
https://ans.disi.unitn.it/~segata

[Michele Segata]

CSMA/CA is used by both in any case. CSMA/CA is the channel access
scheme of 802.11p. Before sending a packet any vehicle checks whether
the channel is free and, in case, postpone the transmission. Changing
the beacon interval doesn't guarantee you that they won't interfere.

Anyhow, if you are interested in having different beacon intervals for
different platoons, use parameter arrays

https://omnetpp.org/doc/omnetpp/manual/#sec:simple-modules:emulating-parameter-arrays

Best,
Michele

On 19/06/2017 16:24, Carlina Carlina wrote:
> Thank you for your detail answer. It definitely helps.
>
> My mean with the "different network" is that in my scenario, I am
> considering two platoons and according to my requirement the beacon
> interval should use by one platoon. The other platoon should only use
> CSMA/CA mechanism. For this reason, I'm trying to find a way to the
> separate platoons so that both platoons cannot use the same beacon
> interval. Due to my limited knowledge, I don't know, in that case, it
> will still interfere or not and delay in their transmission or reception.
>
> Thank you.

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>
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> Michele Segata, PhD
> Department of Information Engineering and Computer Science
> University of Trento, Italy

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Michele Segata, PhD
Department of Information Engineering and Computer Science
University of Trento, Italy

https://ans.disi.unitn.it/~segata/