[Ns-developers] Release: An accurate physical layer implementation for IEEE 802.11 OFDM

[Jens Mittag]

Hi,

after having polished, tested and documented our code base, we, 
Stylianos Papanastasiou and Jens Mittag, are finally able to release our 
new, detailed and accurate physical layer implementation for OFDM-based 
IEEE 802.11 devices.

Our new model is currently called "PhySimWifi" and is a drop-in 
replacement for the already existing YansWifiPhy.

Our model requires 2 minor changes in the existing NS-3.9 release, 
which, however, do not brake any existing code/logic:

     1) The addition of a new method called "GetRelativeVelocity()" 
within the class MobilityModel. See the initiated code review under

        http://codereview.appspot.com/2135046/

     2) An extension of the method "Enum::MakeEnumChecker()" to allow 
more than 12 value parameters. See the initiated code review under

        http://codereview.appspot.com/2150045/

The physical layer model implementation itself is provided as a code 
review under

        http://codereview.appspot.com/2173042/

and we are happy to receive your comments. But please be aware that this 
is a rather huge code review, including the model itself, about 212 
individual test cases, documentation and example scenarios.

The three patch sets can currently also be downloaded as a single patch 
from

   http://www.lefrog.at/NS-3.9-PhySimWiFi-1.0.patch

or as a full NS-3 package (based on NS-3.9) from

   http://www.lefrog.at/NS-3.9-PhySimWiFi-1.0.tar.bz2

The included manual and documentation (under 
src/contrib/physim-wifi/doc/) is available as a PDF and helps you to 
understand the architecture and the frame construction, frame reception 
and channel modeling processes:

   http://dsn.tm.uka.de/medien/downloads_old/Manual-PhySimWiFi-1.0.pdf

Disclaimer: this model is NOT intended to replace the existing 
YansWifiPhy implementation. The above implementation is much slower than 
YansWifiPhy. It also does not bring more accuracy in basic scenarios 
with only a simple pathloss effect on the wireless channel. As such, it 
is supposed to be an alternative to the YansWifiPhy for scenarios, in 
which multi-tap channels or Doppler effects have to be modeled.

With kind regards
  Jens Mittag, Stylianos Papanastasiou

-- 
Dipl.-Inform. Jens Mittag
Karlsruhe Institute of Technology (KIT)
Institute of Telematics
Decentralized Systems and Network Services Research Group

Zirkel 1, 76131 Karlsruhe, Germany
Building 20.20, Room 356.1

Phone: +49 (721) 608 5768
Fax:   +49 (721) 608 6789

http://dsn.tm.uni-karlsruhe.de/

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