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ns Multicast in wired+wireless scenario

  • joaom
    Participant

    I am trying to create a MULTICAST scenario with wired and wireless nodes but I got some problems doing this.
    I created a simple topology like this, where (W0..W2) are the wired node,
    BS the Base Station and MH the Mobile Host, but i got errors. I have read that is not possible to do.

    W0…….W1
    ………./
    ……../
    …..W2
    ……|
    …..BS

    …..MH

    Could anyone help me about this?

    #76 January 29, 2008 at 11:53 am
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  • CharlesPandian
    Keymaster

    If it is possible, upload a simple version of a tcl script demonstrating this scenario and what output/error you are getting while running the script. (Please Mention the version of your ns2)

    #574 February 3, 2008 at 3:36 am
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  • joaom
    Participant

    The problem is that by using multicast ( $ns multicast ) I can’t use hierarchical addresses. I guess it’s incompatible with multicast in ns. In other hand, to use wireless nodes connected to Base Stations (BS) I have to use hierarchical addresses to tell mobile nodes who are their BS. The reason I got errors it’s because mobile node is not connected to any BS because I have no way to pass the ID of the BS to the mobile node.. so when I make mobile node participate in any connection I obviously get errors.. I’ve been searching for a way to make this scenario work but everybody says that this is not possible in ns because multicast is implemented in Otcl while wireless is implemented in c++. I’m using ns 2.32. If you have any idea about a way to solve this I will appreciate.

    #575 February 4, 2008 at 11:16 am
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  • andi
    Participant

    Hai,,
    I’m trying the same network simulation environment like you. Exactly the same like you built in wired-cum-wireless. I’ve tried to use all of the multicast routing available in Ns-2,but never succeded. Currently i’m trying to send the multicast packet using the MAODV proposed by Yufang Zhu and
    Thomas Kunz on ns-2.26 based on cygwin windows, failed to run the MAODV routing. Maybe there’s any improvement on your work that you’ve done??

    #576 April 21, 2008 at 4:49 pm
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  • joaom
    Participant

    Hi,

    Since a face a lot of troubles with multicast and wireless a decide to use another strategy! See the example of mobile IP in tcl/ex/miptest.tcl. However, take a look at this site: http://impact.asu.edu/MX.html
    I haven’t try it but I guess they done exactly what we need. After you try it please let me know, make a post, it could be useful for others too!

    Bye

    #577 April 21, 2008 at 8:33 pm
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  • andi
    Participant

    Hai,,
    I’ve succeded to implement the 802.11-MX on my cygwin.
    I’m trying to run the example script from the package
    ($ns MX-Sample-MAC-Data.tcl -movement MS-Movement-Static.tcl -BER 5)
    without making any changes.
    -My question is about the output trace file and the nam file, I’ve got
    nothing on both of the output file. So i’ve got the “blank” file for both
    grid20.nam and grid20.tr. How can i trace the packet sent and making the
    animator??What did i miss there?? How can i get contacted with the author btw???

    #578 April 25, 2008 at 4:13 pm
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  • joaom
    Participant

    Hi,

    As I told you before, I haven’t try this package. I’m sorry but I have no idea about the way It works. Sorry again.

    #579 April 25, 2008 at 6:32 pm
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