Need to create a exponential random ON off Traffic

[Bibek Luitel]

I am trying to  convert creaate a onOff Application with exponential random variable which was previously created on version  before  ns-3.14like this ..

  oo.SetAttribute("OnTime",RandomVariableValue(ExponentialVariable(1)));  

I have tried all the  examples in ns-3.20/examples 

but  am not able to start the application with exponential random variable

 oo.SetAttribute("OnTime",StringValue ("ns3::ExponentialRandomVariable[mean=1|Bound=1]"));  

oo.SetAttribute("OffTime",StringValue ("ns3::ExponentialRandomVariable[mean=1|Bound=1]"))

but my application is not starting .. what should i do to create a exponential random  traffic  on Off application

[Tommaso Pecorella]

Hi,

it should work. What do you mean by "is not starting" ?

T.

[Visali]

Hi,
          The same error occurred to me also. The client is not generating the packets when i gave the exponential random variable for Off Time. Please tell me how to solve this.

OnOffHelper clientHelper ("ns3::UdpSocketFactory", InetSocketAddress(Ipv4Address (), remotePort));
    clientHelper.SetAttribute("PacketSize", UintegerValue(packetSize));
    clientHelper.SetAttribute("OffTime", StringValue ("ns3::ExponentialRandomVariable[Mean=0.001|Bound=1]"));
   
    clientHelper.SetAttribute("OnTime",StringValue ("ns3::ConstantRandomVariable[Constant=0.001]"));
   
    clientHelper.SetAttribute("DataRate", StringValue ("10Mbps"));

Regards

[Konstantinos]

Hi Visali,

Tommaso's question apply also to your case. 

What do you mean it is not generating packets? Are you tracing the OnOffApplication/Tx or using NS_LOG to confirm that? 

Regards,

K.

[Visali]

Hii Konstantinos,

I am using flow monitor to check the packet flow, but there are no transmit or receive bytes. Also I used NS_LOG SeqTsHeader to check the UDP start times, but there is no flow. Please help.

Regards,
Visali

[Konstantinos]

Hi,

Please provide full script to check if there is a bug in NS-3 or in your code.

Regards

K.

[Konstantinos]

I just checked your code more carefully, and you have not configured the client properly.

OnOffHelper clientHelper ("ns3::UdpSocketFactory", InetSocketAddress(Ipv4Address (), remotePort));

You need to specify the address of the remote host. Currently you do not give any.

On Monday, October 12, 2015 at 5:53:45 AM UTC+1, Visali wrote:

[Visali]

Thank you Konstantinos. Got the ouput

Regards,
Visali

[xavier ashish]

hi

i am also trying to use OnOffApplication with on time set as constant random variable and off time set as exponential random variable

and applied all the necessary requirement for OnOff application but still its not working and showing error.

ApplicationContainer cbrApps;
  uint16_t cbrPort = 12345;
  OnOffHelper onOffHelper1 ("ns3::UdpSocketFactory", InetSocketAddress (Ipv4Address ("10.1.1.50"), cbrPort));
  onOffHelper1.SetAttribute ("PacketSize", UintegerValue (1024));
  onOffHelper1.SetAttribute ("OnTime",  StringValue ("ns3::ConstantRandomVariable[Constant=1.0]"));

  onOffHelper1.SetAttribute ("OffTime", DoubleValue ("ns3::ExponentialRandomVariable[mean=1|Bound=0]"));

kindly help

thankyou

[Jared Dulmage]

Xavier,

It seems you have your "OffTime" attribute set to a DoubleValue which prob won't parse that TypeId string.  Why not do what you did with "OnTime" and pass a StringValue.  Also the attribute names in ExponentialRandomVariable are "Mean" and "Bound" (note the caps).

Hope that helps,

Jared.

[xavier ashish]

thanks Jared Dulmage
just got the output

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Ashish Xavier Das