TDMA/FDMA support for mac layer in 802.11?

[Billy]

Hi all,

Just curious, is there any support in NS-3 for mesh wifi networks to
use TDMA or FDMA in the mac layer?
If there is, are any examples that show how I can configure the mac
layer to use tdma/fdma?

Thanks,
Billy

[Nicola Baldo]

Hi Billy,

On Apr 29, 6:30 pm, Billy <zhon1...@gmail.com> wrote:
> Just curious, is there any support in NS-3 for mesh wifi networks to
> use TDMA or FDMA in the mac layer?

no, because the IEEE 802.11 standard uses only CSMA, not TDMA nor
FDMA.

If you are asking about the PCF (which is the feature of 802.11 most
similar to TDMA that I can think of), it's not supported in ns-3
either.

By coordinating wifi devices so that they transmit on different
channel according to a given allocation, you could in principle
implement an FDMA-like wifi mesh network solution. Of course CSMA
would still be used to access each channel. Still, I am not aware of
anyone working on this for ns-3.

Regards,

Nicola

[Billy]

Thanks for the response, Nicola. Does the current mesh example in
NS-3 use CSMA on the mac layer?
Because when I modified that example to have two nodes simultaneously
send packets to one another at the same time; it seems that neither
nodes receive any of the packets.

Billy

[Billy]

Also, outside of 802.11, are there any net devices in NS-3 that
support either TDMA or FDMA?