[Ns-developers] 802.11n implementation

[Timo Bingmann]

On Wednesday 03 December 2008 20:05:17 Mirko Banchi wrote:
> Hi all!

Hello there, I am also currently working on enhancements to the 802.11 models in ns-3.

The research group here studies VANETs. In this context I am attempting to add required features to ns-3: EDCA QoS mechanisms and to enhance the Yans PHY layer with capture effects and user-definable coding rates (i.e. 5.9 GHz). Another goal of mine is to create a ns-2 compatible PHY, which emulates the *Ext 802.11 classes in ns-2 as far as possible.

Time frame till this is completed: 4-5 month. And with my thesis it will be heavily documented. I tend to write much documentation.

Greetings,
Timo

> I'm a student at the University of Florence and i am going to write my
> diploma thesis in the next 6 months. I am working with the researcher
> development team of the LART lab (Telecommunication Engineering) in
> order to realize 802.11n support for NS-3.
> Our main goal is to simulate the frame aggregation feature. In the
> future we aim at implementing the High Througput terminal behaviour with
> MIMO technology.
> We plan to add to NS-3 the interfaces for the physical and MAC layer in
> order to support 802.11n standard, in particolar our interest is focused on:
> -Frame Aggregation
> -Block ACK
> -HCF (EDCA and support for HCCA)
> -TXOP
> -HT terminal (also with protection modes)
> -MIMO
> We are also interested to verify the 11n terminal throughput when are
> associated terminal of a/b/g standards.
> 
> We plan to release our code to the public use under the same copyright
> as NS-3, and if possible to merge our 802.11n modules into main NS-3
> branch. In order to do that, however, we feel important to coordinate
> with the NS-3 802.11 development group, specifically for the decisions
> about the modules interfaces.
> 
> We'd also be very happy to know if there is any other group working on
> the same topic, as is 802.11n.
> 
> In our opinion the things that need to be first settled are about:
> 1) MIMO:
> Is the best strategy the implementation of four physical layers or one?
> 
> 2) BlockAck:
> For blockAck feature is sufficient implement it in MacLow layer?
> 
> 3) Frame aggregation:
> Is the best choice to put aggregation's implementation in dca-txop or in
> an upper "layer"?
> 
> 4) EDCA:
> For EDCA is sufficient realize a qsta and a qap classes with four
> dca-txop which represent the four queue for the differents AC?
> 
> The number of topics to be discussed are quite a few, so we'd like to
> have first some feedbacks about the general 802.11n development idea and
> roadmap.
> As soon as we will receive feebacks we will post different threads for
> each of the above points or any other related.
> 
> Best regards,
> 
> Mirko
>