[Ns-developers] GSoC: WiMAX Projects

[Juliana Freitag Borin]

Hi Flavio,


> I'd like to develop the WiMAX module for ns-3, adding a scheduler based on
> priorities of queues based on their QoS requirements. The module will
> support grants and bandwidth allocation.
>

Just to make it clear, the resource allocation in the 802.16 standard is
done by 3 schedulers, the uplink scheduler and the downlink scheduler at the
BS, and the scheduler at the SSs. The idea in this project is to implement
the uplink scheduler at the BS. There are many proposals in the literature,
but I would suggest the one in [1], which is already implemented in [2], a
WiMAX module for ns-2.

[1] http://dx.doi.org/10.1109/GLOCOM.2007.476
[2] http://www.lrc.ic.unicamp.br/wimax_ns2/


> I also plan to include propagation and error models. I have studied the
> models of ERCEG and COST 231 for the propagation. This two models were
> recommended by the document WiMAX System Evaluation Methodology of WiMAX
> Forum. I still don't know which error model to implement, but with the SNR,
> we can get the BER, and derive the PER. With the propagation model and
> error
> model, the packet loss would be more realistic.
>
> Another thing I would like to code is the change of modulation and
> coding(AMC) according to the channel quality or loss rate.
>

   The propagation and error models as well as the AMC are very important
features to make the simulation more realistic. But I think that considering
the project timeline you could concentrate in one of them. One idea is to
choose one of the propagation models you have already studied and describe
how you would implement it.


>
> I'm still studing WiMAX module for ns-3[
> http://code.nsnam.org/iamine/ns-3-wimax/summary], but couldn't find these
> features implemented.


  The paper in [3] can help you understand which features are already
implemented.

[3] ftp://ftp-sop.inria.fr/rodeo/turletti/simutools09.pdf

Regards,
Juliana.