Overview

The motivation of this project is to simulate OFDMA/802.11ax type of systems. As part of this project we have developed few new classes and modified many existing ones to support OFDMA/802.11ax type of WLAN systems. This simulator includes MAC and abstracted PHY layers. Note : Our code is not fully compliant with IEEE802.11ax standard

Downloading and Installation

Follow the https://www.nsnam.org/wiki/Installation#Installation to install and build an ns3 repo. Make sure you install the ns-3.26 version as the patch is compatible with ns-3.26 only

Patch and build

Clone the Cisco github repository

$ git clone https://github.com/cisco/ns3-802.11ax-simulator <cloneDir>

Apply the patch and add files from cloned Cisco repo to the ns3 installated directory

$ cd <ns3_installed_dir>

$ find <cloneDir>/ns-3.26 -type f  -exec cp {} {} \;

$ git apply <cloneDir>/tools/ofdma.patch

Build

$ ./waf build

Usage with example

Run Program

$ ./waf --run scratch/wifi-ofdma-multi-traffic	 - builds and runs

To debug if something goes wrong in run time

$ ./waf --run scratch/wifi-ofdma-multi-traffic "--command-template=gdb/lldb %s"

Passing parameters to the program

Some variables such as packet size, number of packet etc can be modified by command 
line argument passing as well

$ ./waf --run scratch/wifi-ofdma-multi-traffic "--numPackets=10"

Models

Newly added Models:

RRMWifiManager, HEWifiChannelHelper, HEWifiPhyHelper, HEWifiPhy, HEWifiChannel, 
Enterprise11axPropagationLossModel, HEBitMap, PerTag

RRMWifiManager            : 	Once resources are allocated, it triggers MAC layer for packet transmission.
				 
HEWifiChannelHelper       : 	This class helps to configure HEWifiChannel parameters from
					program such as channel number etc.

HEWifiPhyHelper           : 	This class helps to configure HEWifiPhy parameters from
					program such as error rate models etc.
				 
HEWifiPhy                 :		This class supports some of the OFDMA aspects
				 
HEWifiChannel  	      :		This class helps for OFDMA transmissions and calculates 
					propagation loss using Enterprise11axPropagationLossModel.
						       
HEBitMap		      : 	This class is used to for RU (Resource Unit) bitmap


PerTag 		      :		This class is used to log PER (Packet Error Rate) for each packet.

Some other classes such as MacLow, WifiTxVector, WifiMacHeader, EdcaTxopN etc. have been modified to support RU concept.