Queuing Models in NS2

M/M/1 is a system with poisson arrival time, servicing exponentially and a queue of unlimited capacity and type of FIFO Queue. This is the simplest queuing system.  NS2 supports various distributions like pareto, exponential, constant, unifrom, etc to handle the network dynamics and metrics. So it is very easy to test the given network link to monitor a given queue using any of these queuing models. The listing 3 and 4 are monitoring the link when DropTail queue is used with a capacity of finite and infinite. Listing 13.3 uses infinite capacity and Listing 13.4 uses Finite capacity The output screen shot is shown below the scripts for further understanding
Listing 3 – M/M/1 Queuing Model #new Simulator creation set ns [new Simulator] #trace file creation for capturing the UDP data set tf [open out.tr w] $ns trace-all $tf
#setting the exponential distribution param set lambda 30.0 set mu     33.0
#creation of nodes set n1 [$ns node] set n2 [$ns node] #The queue limit is 1Lakh as the capacity is infin…

WSN Flooding Routing Protocol (WFRP) in Network Simulator (NS-2.35)

Installation of WFRP (WSN flooding routing protocol) as given in the site http://elmurod.net/en/index.php/archives/157.
This post will help you to install the wfrp protocol in the Network Simulator 2.35 (ns-2.35) and you can run this without any bug or error
Here are the files to be corrected and downloaded: Download this Zip file and uncompress it and copy it to the relevant folders as given below (Instead of manual changes, you can copy the files and recompile) – Please take a backup of your NS-2.35 folder as these changes may affect your existing recompiled sources.
Copy these three files (wfrp.cc, wfrp.h, wfrp_packet.h)  in the folder called ~ns-2.35/wfrp
  • ~ns-2.35/Makefile.in
  • ~ns-2.35/queue/priqueue.cc
  • ~ns-2.35/common/packet.h
  • ~ns-2.35/trace/cmu-trace.h
  • ~ns-2.35/trace/cmu-trace.cc
  • ~ns-2.35/tcl/lib/ns-packet.tcl
  • ~ns-2.35/tcl/lib/ns-lib.tcl
  • ~ns-2.35/tcl/lib/ns-agent.tcl
  • ~ns-2.35/tcl/lib/ns-mobilenode.tcl
Here are the following changes (changes gives in the Black Circle) in ~ns-2.35/queue/priqueue.cc
here are the 3 changes in the ~ns-2.35/common/packet.h file
changes in the ~ns-2.35/trace/cmu-trace.cc  file
~ns-2.35/tcl/lib/ns-lib.tcl (two changes)
Here is the Makefile.in changes
If you don’t have patience to see the images above, please look the video for doing the WFRP Protocol
Once all these steps are completed, Open the terminal and go to the ~ns-2.35/ folder and give these commands one by one
$ ./configure
$ make
If no errors in the compilation, execute the wfrp_802_15_4.tcl (given in the zip file), using
$ ns wfrp_802_15_4.tcl 
This file will generate the trace and nam file. Use the NAM file to see the animation using
$ nam filename.nam

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