[ns] Transmission Range in WirelessPhyExt

[Remi Vannier]

Hi,

In WirelessPhyExt, a reception depends on the SINR level at the 
receiver, instead of a simple Rx_threshold. So Pt is a factor, but the 
noise level as well. Also, I think that no message may be received if 
its power is below the carrier sense threshold. If I remember my own 
experiments correctly, any message with enough power to be detected 
could be decoded if there were no interferences, which may, or may not 
be realistic.

I have no clue about how to find realistic values for these parameters. 
Please tell me if you find anything about this.

You will find all 802.11Ext parameters in tcl/lib/ns-defaults.tcl.

Remi

Alexander Adrowitzer a écrit :
> Hi all,
> I have some troubles in setting the transmission range in WirelessPhyExt 
> (ns-2.34).
> I tested the examples with IEEE 802.11a and 802.11p and found (by 
> simulaiton) a transmission range of 163m and 202m respectively.
>
> Changing the value of Pt_ does change the transmission range, but not in 
> a "predictable" way. I use TwoRayGround model btw.
>
> Does anybody know how to calculate transmission range in WirelessPhyExt?
>
> Thanks
> Alexander Adrowitzer
>
>