Re: [ns] dei80211mr dsr seg fault
Hi Ryan, when using DSR, you need to use a CMUPriQueue instead of a Queue/DropTail/PriQueue. This issues is due to the DSR implementation, and is not related to dei80211mr. I tried this on the adhoc_tcp.tcl script and I was able to run DSR successfully with no segfault. Regards, Nicola ryan m wrote: > hello, > Has anyone has any luck with using dei80211mr with DSR? When I > take the the adhoc_tcp.tcl script from the sample directory in the > distribution and change the routing protocol to DSR and change NOTHING > else ns Segmentation faults when I run the script. Would you know > what has to be changed about the script to make it work with DSR? Or > even better have a script handy that uses dei80211mr, dsr, and output > from setdest for mobility? > > Thank you for any help you might offer, > Ryan >
Re: [ns] dei80211mr-1.1.1 "Tabella non inizializzata 1"
ryan m wrote: > hello, > I'm using dei80211mr-1.1.1 and ns-allinone-2.31 and I want to simulate > a typical 802.11g ad-hoc network, so I set the following parameters to > that end. > > $mac($i) dataMode_ Mode54Mb > $mac($i) basicMode_ Mode2Mb > > With these settings (and several others) I'm getting the error > "Tabella non inizializzata 1" repetatly to cerr, Ok I'll translate that error message to something more meaningful for english speakers in the next release ;-) This error occurs when a Packet Error Rate value cannot be found for some PHYMode. The common reason for the error is that you did not load the correct Packet Error Rate table into an instance of a PER object. In the adhoc_tcp.tcl script this is done using the following command: set per [new PER] $per loadPERTable80211gTrivellato but that table is for 802.11g modes only. If you try, e.g., to use Mode1Mb in the same simluation script, you'll get the error you mentioned. In dei80211mr we provide also a PER table for 802.11b, which is loaded using this command: $per loadPERTable80211bIntersilHFA3861B You can also define your own PER table if you wish. Just have a look at src/per_table_*.tcl to see how to do it. The last four values for each row are: PHYmode packetsize SNR(dB) PacketErrorRate Regards, Nicola
[ns] Fwd: Bandwidth Adaptation
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[ns] Westwood and Wireless Networks
I have noticed a strange occurrence in the behavior of TCP westwood when using a wireless simulation. Here is the scenario: If I have one westwood FTP flow application running from node 0, trying to send it to node 2, and node 2 is too far away (so it hops through node 1) the measured RTT_MIN seen by westwood is 20,000 and STAYS at that rate throughout the entire simulation (no new RTT_MIN is calculated). Note that the INIT_RTT is set to 20,000 (not sure if this is right either, might be a bug). If I set node 2 close enough to node 0, then Westwood updates its MIN_RTT to something more appropriate right away (generally 24 or something). Also, when I run TWO westwood simulations, for some reason it works in both cases. So my question is, why in the scenario where one Westwood flow hops to its destination does the MIN_RTT get set to some insanely high number and stay there? --- Arya Afrashteh Virginia Tech - CpE Grad Student [EMAIL PROTECTED] ---
[ns] streaming video over wireless networks
Hi,every body! I want to streaming video over wireless networks.But I am a ns2 newbie. Would you give me some suggestions?
[ns] help:simulate gprs network
hi, everybody! I want to simulate the gprs network.I've download the gprs-072501-2.1b7a.tar.gz. But I dont know how to begin my work. Would anyone give me some suggestion? Regards! Cecilia P.
[ns] Help!! anyone can help me about this simulation!!!!!
Help!! anyone can help me about simulate WSN in ns2? I've try to use the usual wireless simulation but i ignore the power factor. I use the DSR. My problem is how to connect or send packet from node 1 to 4 with this kind of topology: 1 2 3 - 4 note: node-1 just have the comm range for node 2 node-2 just have the comm range for node 1 & 3 node-3 just have the comm range for node 2 & 4 node-4 just have the comm range for node 3 -- jho
