Madhurig at 07:30, 4 March 2024

2024-03-04T07:30:43Z

Nirmala Venkat: Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' '''Welcome''' || Welcome to the spoken tutorial on '''Analyzing network performance in ns-3.''..."

2024-01-30T10:18:04Z

Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' '''Welcome''' || Welcome to the spoken tutorial on '''Analyzing network performance in ns-3.''..."

New page

{| border="1"
|-
|| '''Visual Cue'''
|| '''Narration'''
|-
|| '''Slide:1'''

'''Welcome'''
|| Welcome to the spoken tutorial on '''Analyzing network performance in ns-3.'''
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Learning Outcomes'''
|| In this tutorial, we will learn to
* <div style="margin-left:1.27cm;margin-right:0cm;">Use trace sources</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Create callback functions</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Connect trace sources to callback functions and</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Calculate network parameters using trace sources</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''System Requirements'''
|| To record this tutorial, I am using
* <div style="margin-left:1.27cm;margin-right:0cm;">'''Ubuntu''' '''Linux Operating system version''' '''22.04'''</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">'''ns-3.38'''</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">'''NetAnim '''visualizer tool</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Prerequisite'''

[https://spoken-tutorial.org/ https://spoken-tutorial.org]
|| To follow this tutorial,
* <div style="margin-left:1.27cm;margin-right:0cm;">You must have basic knowledge of using Linux terminal</div>

* <div style="margin-left:1.27cm;margin-right:0cm;">You must know how to create a '''point-to-point '''network in '''ns-3'''</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">For pre-requisite Linux and '''ns-3''' tutorials, please visit this website</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Code files'''
||
* <div style="margin-left:1.27cm;margin-right:0cm;">The files used in this tutorial are provided in the '''Code files''' link</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Please download and extract the files</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Make a copy and then use them while practising</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show diagram''':'''

'''Point-to-Point network with two nodes'''
|| For this tutorial, we would be creating the following topology:
* <div style="margin-left:1.27cm;margin-right:0cm;">A '''point-to-point''' network with address 10.1.1.0</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Open the file '''network_performance.cc '''in the text editor.
|| I have created the source file '''network_performance.cc''' for this program.

Now we will go through the source code in the text editor.

The source code contains the required functions to analyse network performance.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''double node0_trans_time'''
|| First we declare the variables.

These variables shall hold the network parameters.

'''node0_trans_time''' holds the transmission time for node 0.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''node1_rec_time'''
|| '''node1_rec_time '''holds the packet receiving time for node 1.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''node0_rec_time'''
|| '''Node0_rec_time '''is the time at which node 0 receives the echo packet from node 1.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''round_trip_time <nowiki>= 0.0</nowiki>'''
|| '''round_trip_time '''holds the round-trip packet time.

That is, the time taken to go from node 0 to node 1 and return.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''total_delay = 0.0'''
|| '''total_delay '''holds the sum of all delays.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''prop_delay = 6560.0'''
|| '''prop_delay '''is the propagation delay of the channel.

It is set by us.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''throughput = 0.0'''
|| '''throughput '''holds the throughput of the network.

It is the rate of packet delivery.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''trans_delay = 0.0'''
|| '''trans_delay '''holds''' '''the transmission delay of a packet.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''RxTraceClient(std::string context, Ptr<const Packet> p)'''
|| '''RxTraceClient '''is a '''callback function'''.

It is executed whenever the client receives a packet.

The first argument is the traced source.

We shall explain trace sources later in this tutorial.

Here the traced source is Rx.

The second argument is the packet received.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''node0_rec_time = Simulator::Now().GetSeconds()'''
|| In the function, we will update the value of '''node0_rec_time '''variable.

Here, we set the value of the current time.

The current time is found using the '''GetSeconds '''method.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight''' round_trip_time'''
|| Similarly, we update the value of the '''round_trip_time '''variable.

We set it to the sum of transmission and reception time of packets.

These values are represented by '''node0_trans_time''' and '''node0_rec_time'''.

The '''node0_trans_time '''variable would be updated in the '''TxTraceClient '''function.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''round_cnt++'''

|| Next, we increment the value of the '''round_cnt''' variable by 1.

We do so, to keep a track of the number of round-trips.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''TxTraceClient'''
|| '''TxTraceClient '''is a callback function.

It is executed whenever the client sends a packet.

The first argument is the traced source.

The second argument is the receive packet.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight <span style="color:#24292e;">'''node0_trans_time'''</span>
|| In the function, we set the value of '''node0_trans_time.'''

The value is the time at which transmission starts.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''RxTraceServer'''
|| The last callback function is '''RxTraceServer.'''

It is executed when the server node receives a packet.

The first argument is the traced source.

The second argument is the received packet.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''node1_rec_time = Simulator::Now().GetSeconds()'''
|| Here we set the receiving time to the current time in seconds.

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''total_delay += (node1_rec_time - node0_trans_time)*1000'''
|| Then, we set the '''total_delay''' variable, which stores the total delay.

It is computed as the difference between two variables.

The first is the packet reception time of the server.

The second is the packet transmission time of the client.

The value is multiplied by 1000 to get the unit in milliseconds.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''trans_delay += ((node1_rec_time - node0_trans_time)*1000 - prop_delay/1000000)'''
|| Next, we compute the value of '''transmission delay'''.

We get it by subtracting the value of propagation delay from '''total delay'''.

The propagation delay value is in nanoseconds, hence we divide it by 1000000.

This converts it into milliseconds.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''pkt_cnt++'''
|| Next we increment the packet count.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''if (pkt_cnt == pkts)'''
|| Finally we compare the value of packet count to the total packets.

We do this to know when the last packet is received.

If this is the last packet, we print all the parameters.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''NS_LOG_UNCOND'''
|| Using the '''NS_LOG_UNCOND '''function, we print the parameters to the terminal.

We print the parameters:
* <div style="margin-left:1.27cm;margin-right:0cm;">End-to-end delay</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Transmission delay</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Throughput</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Propagation delay (constant)</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''total_delay/(p->GetSize()*pkts'''
|| '''Throughput '''is calculated as total delay divided by total data size.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''nodes.Create(2)'''

|| Let’s move to the main function now.

For the topology, we create a '''point-to-point''' network with two nodes.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''SetDeviceAttribute'''
|| The '''data rate''' for the device is 100 Mbps.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''SetChannelAttribute'''
|| The '''propagation delay''' is set to 6560 nanoseconds.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''address.SetBase("10.1.1.0", "255.255.255.0")'''
|| The base address of the network is 10.1.1.0.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''UdpEchoServerHelper echoServer(9)'''
|| Next we create a UDP echo server with port address 9.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''echoServer.Install(nodes.Get(1))'''
|| The echo server application is installed on the second node.

The index of the node is 1.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''serverApps.Start(Seconds(1.0))'''
|| Here we set the start time of the server applications to 1 second.

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''serverApps.Stop(Seconds(10.0))'''
|| Similarly, we set the stop time to 10 seconds.

Both the times are from the start of the simulation.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''echoClient(interfaces.GetAddress(1), 9)'''
|| Then we create an echo client application with destination port 9.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''SetAttribute'''
|| Using the '''SetAttribute '''method we set the following attributes for the client.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''MaxPackets'''
|| The maximum number of packets is 10.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''Interval'''
|| The time interval between packet transmissions is 0.5 seconds.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''PacketSize'''
|| The packet size is 1024 bytes.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''echoClient.Install(nodes.Get(0))'''
|| The echo client application is installed on the first node.

The index of the node is 0.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''clientApps.Start(Seconds(2.0))'''
|| The start time of the client apps is set to 2 seconds.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''clientApps.Stop(Seconds(10.0))'''
|| The stop time is 10 seconds.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''Config::Connect'''

|| Using the connect method, we connect trace sources to callback functions.

These functions are also known as trace sinks.

A callback function is passed as an argument to another function.

These are used in conjunction with trace sources.

'''Trace sources '''are entities that signal events in an ns-3 program.

These events include packet transmission, change in window size etc.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''UdpEchoClient/Tx'''

|| This program uses three trace sources.

The first is the '''Tx''' trace source, of the '''UdpEchoClient '''class.

It traces the transmission of a packet by an echo client application.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''UdpEchoClient/Rx'''
|| The second trace source is '''Rx, '''of the '''UdpEchoClient '''class.

It traces the reception of a packet by an echo client application.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''UdpEchoServer/Rx'''

|| The last trace source is '''Rx, '''of the '''UdpEchoServer '''class.

It traces the reception of a packet by an echo server application.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight <span style="background-color:#ffffff;">'''AnimationInterface anim ("network_performance.xml");'''</span>

|| Next we create an '''AnimationInterface '''object, '''anim, '''for '''NetAnim '''animation.

The parameter for the constructor is the name of the XML animation file.

It will be generated by the program after the simulation.

Here the name of the file is '''network_performance.xml'''.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| <span style="color:#24292e;">Highlight </span>'''anim.SetConstantPosition'''
|| Then set the positions for the nodes using the '''SetConstantPosition '''function.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''Simulator::Run()'''
|| The '''Run '''function is used to run the simulation.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Highlight '''Simulator::Destroy()'''
|| The '''Destroy '''function ends the simulation.

Close the text editor.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
||

Press Ctrl,Alt and T keys simultaneously.

Type '''cd ns-allinone-3.38/ns-3.38 '''to navigate to the ns3 installation directory

Type '''mv ~/Downloads/network_performance.cc scratch/network_performance.cc '''to move the source file to '''scratch '''directory.
|| <div style="color:#000000;">Now we will observe the simulation. </div>

<div style="color:#000000;">Open a terminal by pressing Ctrl, Alt and T keys simultaneously.</div>

<div style="color:#000000;">Using the '''cd '''command, navigate to the installation directory of '''ns-3'''.</div>

<div style="color:#000000;">Go to the '''ns-3.38''' directory.</div>

<div style="color:#000000;">Move your source file to the '''scratch '''directory within the '''ns-3.38''' directory. </div>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Type ./'''ns3 run scratch/network_performance.cc'''
|| <div style="color:#000000;">Run the command '''dot forward slash''' '''ns3 run space scratch forward slash network underscore performance dot cc.'''</div>

<div style="color:#000000;">'''network underscore performance '''is the name of the source file. </div>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Keep the terminal open and show the output of the command
|| After compilation, we get the network parameters. The parameters are
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">'''End-to-end delay'''</div>
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">'''Transmission delay'''</div>
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">'''Throughput '''and</div>
* <div style="color:#000000;margin-left:1.27cm;margin-right:0cm;">'''Round trip time'''</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Type '''cd ~/ns-allinone-3.38/netanim'''
|| Now, to visualise the network, we will use NetAnim.

Navigate to the '''netanim '''directory under '''ns-allinone-3.38.'''
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Type ./'''NetAnim'''
|| Now type '''dot forward slash NetAnim. '''The NetAnim window will open.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Click on the '''Open XML trace file '''icon on the top left corner of the window.
|| Click on the '''Open XML trace file '''icon on the top left corner of the window.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| In the file picker, navigate to the '''ns-allinone-3.38/ns-3.38 '''directory and select the '''network_performance.xml '''file.
|| In the file picker, navigate to the '''ns-3.38 '''directory.

Select the '''network_performance.xml '''file.

The file would be generated by the program.

You can also download the file from '''Code Files''' section.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| On the toolbar, click on the '''Node Size '''drop down button, and select size 10.
|| On the toolbar, click on the '''Node Size '''drop down button.

Select size 10.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| On the toolbar, click on the play button
|| On the toolbar, click on the play button to view the simulation.

We see the circles representing the nodes.

The lines with arrows represent the transfer of packets.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Hover over node 0 and node 1 circles.
|| We see the packets moving from node 0 to node 1.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Summary'''
|| This brings us to the end of the tutorial. Let us summarise.

In this tutorial, we have learnt to
* <div style="margin-left:1.27cm;margin-right:0cm;">Use trace sources</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Create callback functions</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Connect trace sources to callback functions</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Calculate network parameters using trace sources</div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Assignment'''
|| As an assignment, please do the following:* <div style="margin-left:1.27cm;margin-right:0cm;"><span style="background-color:#ffffff;">Create a </span><span style="background-color:#ffffff;">'''Point-to-Point '''</span><span style="background-color:#ffffff;">network with 3 nodes</span></div>
* <div style="margin-left:1.27cm;margin-right:0cm;">Send packets from node 0 to node 2</div>
* <div style="margin-left:1.27cm;margin-right:0cm;"><span style="background-color:#ffffff;">Calculate </span><span style="background-color:#ffffff;">'''throughput '''</span><span style="background-color:#ffffff;">and</span><span style="background-color:#ffffff;">''' transmission delay'''</span></div>

|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Assignment - Observation'''
|| In the terminal, you will get this output.

The values may vary depending on the network parameters.

These parameters include packet size, propagation delay and data rate.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''About the Spoken Tutorial Project'''
|| <span style="background-color:#ffffff;">The video at the following link summarises the </span><span style="background-color:#ffffff;">'''Spoken Tutorial project'''</span><span style="background-color:#ffffff;">.</span>

Please download and watch it.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show Slide:

<span style="background-color:#ffffff;color:#252525;">'''Spoken Tutorial Workshops'''</span>
|| <span style="background-color:#ffffff;">The </span><span style="background-color:#ffffff;">'''Spoken Tutorial Project'''</span><span style="background-color:#ffffff;"> team conducts workshops and gives certificates.</span>

For more details, please write to us.
|- style="border:0.75pt solid #808080;padding:0.176cm;"
|| <div style="color:#252525;">Show Slide:</div>

<div style="color:#252525;">'''Answers for THIS Spoken Tutorial'''</div>
| style="color:#252525;" | Post your timed queries in this forum.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| <div style="color:#252525;">Show Slide:</div>

<div style="color:#252525;">'''FOSSEE Forum'''</div>
|| <span style="background-color:#ffffff;">For any general or technical questions on </span><span style="background-color:#ffffff;">'''ns-3'''</span><span style="background-color:#ffffff;">, visit the</span><span style="background-color:#ffffff;">''' FOSSEE forum'''</span><span style="background-color:#ffffff;"> and post your question.</span>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide

'''Acknowledgement'''
|| <span style="color:#252525;">'''Spoken Tutorial'''</span><span style="color:#252525;"> Project was established by the </span><span style="color:#252525;">'''Ministry of Education, Government of India'''</span><span style="color:#252525;">.</span>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide

'''Acknowledgement'''
|| <span style="color:#252525;">We thank </span><span style="color:#252525;">'''Dr.Moyukh Laha'''</span><span style="color:#252525;"> from </span><span style="color:#252525;">'''IIT Kharagpur'''</span><span style="color:#252525;"> for his </span><span style="color:#252525;">domain support.</span>

<span style="color:#252525;">We would also like to thank </span><span style="color:#252525;">'''Dr. R. Radha, Dr. X. Anita, and Dr. T. Subbulakshmi '''</span><span style="color:#252525;">from</span><span style="color:#252525;">''' VIT, Chennai '''</span><span style="color:#252525;">for their support.</span>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Show slide:

'''Thank You'''
|| <span style="background-color:#ffffff;">This is</span><span style="background-color:#ffffff;">''' Josiga, '''</span><span style="background-color:#ffffff;">a FOSSEE summer fellow 2023, IIT Bombay signing off.</span>

Thanks for joining.
|-
|}

Ns-3-Network-Simulator/C2/Network-performance-Analysis/English - Revision history

Madhurig at 07:30, 4 March 2024

Madhurig at 12:18, 28 February 2024

Madhurig at 08:05, 31 January 2024

Madhurig at 07:47, 31 January 2024

Nirmala Venkat: Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' '''Welcome''' || Welcome to the spoken tutorial on '''Analyzing network performance in ns-3.''..."

@@ Line 1: / Line 1: @@
 {| border="1"
@@ Line 78: / Line 75: @@
 |-
 || Highlight '''node0_rec_time'''
-|| '''Node0_rec_time '''is the time at which node 0 receives the echo packet from node 1.
+|| '''Node0_rec_time ''' is the time at which node 0 receives the echo packet from node 1.
 |-
 || Highlight '''round_trip_time <nowiki>= 0.0</nowiki>'''
-|| '''round_trip_time '''holds the round-trip packet time.
+|| '''round_trip_time ''' holds the round-trip packet time.
 That is, the time taken to go from node 0 to node 1 and return.
 |-
 || Highlight '''total_delay = 0.0'''
-|| '''total_delay '''holds the sum of all delays.
+|| '''total_delay ''' holds the sum of all delays.
 |-
 || Highlight '''prop_delay = 6560.0'''
-|| '''prop_delay '''is the propagation delay of the channel.
+|| '''prop_delay ''' is the propagation delay of the channel.
 It is set by us.
@@ Line 329: / Line 326: @@
 |-
 || Type ./'''ns3 run scratch/network_performance.cc'''
-|| Run the command '''dot forward slash''' '''ns3 run space scratch forward slash network underscore performance dot cc'''
+|| Run the command '''dot forward slash ns3 run space scratch forward slash network '''underscore performance dot cc'''
 '''network underscore performance '''is the name of the source file.

@@ Line 180: / Line 180: @@
 The propagation delay value is in nanoseconds, hence we divide it by 1000000.
-This converts it into milliseconds.
+This converts it to milliseconds.
 |-
 || Highlight '''pkt_cnt++'''