Adjacent channel interference modelling

[GBadawy]

Hi,
I am trying to model adjacent channel interference in ns3. As channel
separation increases I increase received signal attenuation at the
receiver (i.e if a receiver is on channel 1, a signal received from
channel 2 will be stronger than that received from channel 3).
CalculateSnrPer in interference helper should then take care of the
rest.
My base experiment is that I have 2 senders and 2 receivers on the
same channel (co channel interference). I count the number of received
packets at each receiver when interference is available. Then I move
one pair to an adjacent channel. The behaviour I expected is that as
channel separation increases received packets number should increase
(since interference decreased, PER should decrease and packet drops
should decrease) but this doesn't seem to happen. What happens is as
long as channel separation is below 5 the number of received packets
is always the same and once the channel separation is above 5 the
number of received packets increase abruptly. Note that 5 channel
separations is the default for interference avoidance. In 802.11b
channels 1,6, and 11 are always used.

Does anyone has any explanation to this behavior. Why doesn't the
number of received packets increase or decrease gradually? It has been
proven through measurements that their should be a gradual change in
behavior.

Thanks

[sonam chawla]

Hi GBadawy,

I am also trying to simulate same scenario. Were you able to simulate it properly?
Please help me if you were to do.

Thanks
Sonam

[sumon Debnath]

Can any one solve the above problem in ns3. please help me how to solve this issue.

Best regards
Sumon

[Tommaso Pecorella]

Hi,

do you realize that you're replying to a thread from FIVE years ago ?

Anyway, the feature is already in ns-3, check the SpectrumWifiPhy class.

T.