Trace file is empty with dual interface wireless node

Rajeshwari M

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Mar 24, 2021, 1:42:31 PM3/24/21

to Network Simulator 2 (NS2)

Hi everyone,

I am trying to set up a wireless node with 2 interfaces; one interface with 802.11 Mac and the other with 802.11Ext Mac.

1. The 802.11 interface is used to communicate with the road side unit (or Access Point)

2. The 802.11Ext is for communicating with other stations.

I have followed instructions given in https://personales.unican.es/aguerocr/files/ucMultiIfacesSupport.pdf

to include multi-interface support.

However, in my scenario, communication is not taking place between AP and station and trace files are empty.

I have shared my code in the below link. Can someone please suggest me where I am going wrong.

https://drive.google.com/drive/folders/1Mq3Ce9gYLNK8-vaPW5DN1AwHdiaf8rWI?usp=sharing

Rajeshwari Madli

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Mar 28, 2021, 6:26:16 AM3/28/21

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Hi everyone,

My script works correctly with one wireless node having dual interfaces ( 802.11 and 802.11Ext).

I have configured the 802.11 interface for accomplishing handoff with the access points, and the interface with 802.11Ext is reserved for inter-vehicle communication.

However, when I try to add another vehicle with 2 interfaces, nothing happens after node creation and trace files are empty.

It would be great if someone can guide me with this. Please have a look at my code at

https://drive.google.com/file/d/1mPbJ_P-YA_VQ3pF-SsF8CrkvxmRFX8u5/view?usp=sharing.

Thank you

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Thanks and Regards

Rajeshwari Madli

Research Scholar

Department of CSE

B.M.S College of Engineering

Bengaluru

knudfl

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Mar 28, 2021, 8:54:18 AM3/28/21

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The simulation example.tcl in https://personales.unican.es/aguerocr/files/ucMultiIfacesSupport.pdf

.... has no "dual Mac version" ? ?

The code is about "multi interface", I think, like

set val(ni) 4 ;# number of interfaces, <= number of channels ( "numifs" )

Some usable examples here .... Multi-channel-ex-1.tar.gz

https://drive.google.com/file/d/1oR4EGNELXaaqdECr8feww0j8tb4JOKIK/view?usp=sharing

The code / patch that I am using : CRN-D2CARP_ns235.patch (year 2017)

https://drive.google.com/file/d/1n8DjKmzDxzia1E6dBIDXe80iCfIOOXlP/view?usp=sharing

Ref. D2CARP.diff, Multi-Channel.diff

https://drive.google.com/drive/folders/1ZCsHub8LbIXZwna6ML4iWFMUikuzlB2X?usp=sharing

( D2CARP-ex → D2CARP-ex.tar.gz

https://drive.google.com/file/d/0B7S255p3kFXNV2J6R09RQUo5Y1E/view?usp=sharing )

Rajeshwari Madli

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Mar 29, 2021, 2:50:09 PM3/29/21

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Dear Mr. Knudfl

Thank you for your reply. I understand that the patch I used only offers multi-channel support for the same mac.

I need to configure wireless nodes with dual interfaces with different mac and phy entities, i.e. one with 802.11 (Mac/802_11 and Phy/WirelessPhy) and the other interface with 802_11Ext (Mac/802_11Ext and Phy/WirelessPhyExt)

The MobileNode's add-interface procedure allows us to configure an interface with different mac and phy entities.

//˜ns/tcl/lib/ns-mobilenode.tcl

Node/MobileNode instproc add-interface { channel pmodel lltype mactype qtype qlen iftype anttype topo }

{

....

}

Can we use this to configure multiple interfaces? Do you have any examples/documentation that caters my requirements?