Skip to main content

Posts

Showing posts from March, 2021

Installing ns-3.37 and ns-3.35 in Ubuntu | Ubuntu 22.04 | NS3

Multiple Versions of ns3 in Ubuntu 22.04 In this post, we are going to install two versions of ns3 namely ns-3.35 and ns-3.37  My OS is : Ubuntu 22.04 LTS (Long Term Support) ns-3.35 uses waf and (./waf --run scratch/first)  ns-3.37 uses cmake  (./ns3 run scratch/first.cc) So we will install both the packages  Go through the video for complete instructions To start with  $ sudo apt update  $ sudo apt install build-essential autoconf automake libxmu-dev g++ python3 python3-dev pkg-config sqlite3 cmake python3-setuptools git qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools gir1.2-goocanvas-2.0 python3-gi python3-gi-cairo python3-pygraphviz gir1.2-gtk-3.0 ipython3 openmpi-bin openmpi-common openmpi-doc libopenmpi-dev autoconf cvs bzr unrar gsl-bin libgsl-dev libgslcblas0 wireshark tcpdump sqlite sqlite3 libsqlite3-dev  libxml2 libxml2-dev libc6-dev libc6-dev-i386 libclang-dev llvm-dev automake python3-pip libxml2 libxml2-dev libboost-all-dev  I have downloaded both the versions of ns3 fr

TCP Congestion Control using NS2

Congestion control is one of the performance metrics of TCP protocol. There are so many TCP Versions to control congestion in the network. NS2 also supports various TCP protocols like TCP Vegas, TCP Reno, TCP, TCP Sack, Full TCP, TCP linux, etc. The code can be downloaded from the following link https://drive.google.com/file/d/1EGeJOtqapDIB5NQy5Ar1L7nzPIihSyck/view?usp=sharing Each TCP protocols has different mechanism in controlling the congestion. Some are good at Congestion control, some are good at error ands flow control. Before understanding the congestion control, one has to know the congestion window of TCP. TCP has a congestion window (cwnd_ in ns2), this variable affects or predicts the congestion control. The value assigned to this variable will alter the congestion control. Here are the files that are of prime importance before dealing with congestion control. ~ns-2.35/tcp/tcp.cc  ~ns-2.35/tcp/tcp.h  ~ns-2.35/tcl/lib/ns-default.tcl (In this file, the constant va