[ns] xgraph problem
hello alaeddine hoping that u r very well I would like to produce the tracing of xgraph for a scenario of 50 node it dosnt worke but in 3 node as indivisual it works can u help me please mohd hammad __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [ns] Real time Play with NS-2 emulator
Hello Mowly, You might want to try the Pcap/BPF Network Object to read a packet trace from a file in tcpdump format. http://www.isi.edu/nsnam/ns/doc/node574.html Best regards, Svilen [EMAIL PROTECTED] wrote: I am just putting this question out there to see if it is possible to implement. Right now I only have access to one laptop. I am running ns-2.27 with pclinuxos. So far I was able to 'make nse' and did not return any error messages however I still can't run the pingdemo.tcl. But the question is this: I want the emulator to be able to read a tracefile (a large one perhaps that of a half an hour show) in real time and at the same time output the packets perhaps to a reciever tracefile that is constantly updated as packets arrive. Next the tracefile is read by a real time player such as VLC (I think it has real time capabilities) and outputs the video So I can readily view the real-time video as it is being emulated. I have to all this in one machine or the laptop. Is it possible or has anyone done anything like this before that can offer me some direction? Thank you. Cheers Mowly -- +--+ | M.Sc. Svilen Ivanov | | Institute for Distributed Systems (IVS) | | Otto-von-Guericke University - Magdeburg | | http://ivs.cs.uni-magdeburg.de/~svilen/ | +--+
[ns] xgraph problem
hello alaeddine hoping that u r very well I would like to produce the tracing of xgraph for a scenario of 50 node it dosnt worke but in 3 node as indivisual it works can u help me please mohd hammad __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[ns] Does DSDV stores the Routing table of its neighbours?????
HI Friends, Does DSDV stores the Routing table of its neighbours. I was unable to get it from the code of DSDV. And if it doesn't stores the routing table, then how the increamental updates works. Plezzz help. jeevesh kumar. - Jiyo cricket on Yahoo! India cricket Yahoo! Messenger Mobile Stay in touch with your buddies all the time.
[ns] Values to be set in the TCL file to make the transmission range 100m
Hi friends, What are the values to be set in the TCL file to make the transmission range 100m. In some mail i got some pointer for this but i am not getting them clearly. There i have to set Pt_ variable to a fixed value. Is it the only value I have to change? or it need some more changes. Then what is the use of values written below other than Pt_. CPThresh_ 10.0 CSThresh_ 1.559e-11 RXThresh_ 3.652e-10 Rb_ 2.0e6 Pt_ 0.2818 freq_ 914e+6 L_ 1.0 Please help me. Thanks a lot. jeevesh kumar - Jiyo cricket on Yahoo! India cricket Yahoo! Messenger Mobile Stay in touch with your buddies all the time.
Re: [ns] Set address to ns node
Hello all I have a topology like this __n2 / \ Src---n1/ \n4__Dst \___ / n3 From the src the packets are send both to n2 and n3 in a probabilistic manner. My problem is for every iteration n4 should receive one packet either from n2 or n3 depending on minimum packet sequence number. For e.g. if n2 has packet 2 at the head of the queue and n3 has packet 1 at the head of its queue. n4 should receive packet from n3. How can i do that comparing two queues in different links and dequeing that packet to n4. Cordialement Sandoche BALAKRICHENAN.
Re: [ns] Values to be set in the TCL file to make the transmission range 100m
Hi Jeevash There are two method to do it. Method a) You calculate the RxThreshold using a small program written in C called threshold.cc locayed in the folder ns-2.29/indep-utils/propogation/ compile the file as g++ threshold.cc then run the program /a.out with the required distance you want to transmit. In this case the transmit power remains the same as 0.2818 (default 250m) and also the Carrier Sense Threshold (CSThresh) will remain 550+ but the nodes that are 100+ meter away will drop the packages that they receive considering it an error. Method b) You only change the Pt_ value to 7.214e-3 , This will set the maximum transmission range of the node to 100m. so you can choose which option you want to go for I hope this helps regards Hi friends, What are the values to be set in the TCL file to make the transmission range 100m. In some mail i got some pointer for this but i am not getting them clearly. There i have to set Pt_ variable to a fixed value. Is it the only value I have to change? or it need some more changes. Then what is the use of values written below other than Pt_. CPThresh_ 10.0 CSThresh_ 1.559e-11 RXThresh_ 3.652e-10 Rb_ 2.0e6 Pt_ 0.2818 freq_ 914e+6 L_ 1.0 Please help me. Thanks a lot. jeevesh kumar - Jiyo cricket on Yahoo! India cricket Yahoo! Messenger Mobile Stay in touch with your buddies all the time. Kind regards Qasim Raza Iqbal PhD Candidate, ACNRG Lab N504, Office N505 Adaptive Communications Networks Research Group, School of Engineering And Applied Science Aston University Birmingham B4 7ET United Kingdom http://www.ee.aston.ac.uk/research/acrg/index.html
Re: [ns] Throughput of CBR over TCP
Hi, First, in general, CBR is used for UDP traffic, not with TCP. You should be able to tell the specific reason why you use CBR over TCP. And the question you asked is also dependent upon a bottleneck link speed and a bottleneck queue size. If the dely-bandwidth product is larger than the CBR interval, it is likely that TCP will wait for the CBR interval in oder to send a packet. Soo-Hyun On 4/11/06, 김병길 [EMAIL PROTECTED] wrote: Hi all, I perform simulation of TCP using NS-2 simulator. I already read all mails about CBR over TCP. But, I really not understand about TCP mechanism when CBR is used. 1. use following TCP parameters : 1) CBR packetsize : 500 2) TCP packetsize : default When I start CBR traffic of 500kbps, I can measure throughput of TCP. The result is 2.2Mbps! Is it possible? I know that TCP ignore packetsize upper layer and TCP has own estimation of stable link and suitable time to send the packet. But, my problem is that TCP does not wait the whole size from CBR It seems that TCP sends own packetsize with CBR interval. So, my question is why this is happened? and what is the possible problem? Or, is it my mistake? Thanks in advance.
Re: [ns] Values to be set in the TCL file to make the transmission range 100m
transmission range defined internally by distCST_ the transmission range is suppose to be calculated using the parameted below (as you mentioned) and propagation model however by looking at the Wireless Physical code, the propagation model is not implemented yet and thus the result is as -1 which is wrong. so in 2.29 I had no choice to define it as a fix variable myself - still not sure if this is an accurate simualtion. but to explain it, I am setting energy levels and rx/tx power values to make the simulation more accurate. if you look at it from real life view point, devices (based on an initial energy and type of MAC layer pawer consumption) do have a initial fix transmission range am I correct? Sasan Hi friends, What are the values to be set in the TCL file to make the transmission range 100m. In some mail i got some pointer for this but i am not getting them clearly. There i have to set Pt_ variable to a fixed value. Is it the only value I have to change? or it need some more changes. Then what is the use of values written below other than Pt_. CPThresh_ 10.0 CSThresh_ 1.559e-11 RXThresh_ 3.652e-10 Rb_ 2.0e6 Pt_ 0.2818 freq_ 914e+6 L_ 1.0 Please help me. Thanks a lot. jeevesh kumar - Jiyo cricket on Yahoo! India cricket Yahoo! Messenger Mobile Stay in touch with your buddies all the time.
Re: [ns] Values to be set in the TCL file to make the transmission range 100m
Sasan Sahraei schrieb: transmission range defined internally by distCST_ This is only the maximum assumed interference range for a propagation model and will be used to speed up the calculation of packet receivers. the transmission range is suppose to be calculated using the parameted below (as you mentioned) and propagation model however by looking at the Wireless Physical code, the propagation model is not implemented yet and thus the result is as -1 which is wrong. You have various implemented propagation models (e.g. FreeSpace, TwoRayGround, Shadowing). Maybe you just look at the base class for all propagation models. The transmission range is defined by the antennas of the transmitter AND the receiver, the transmission power, signal attenuation, modulation scheme (which results in different receiver sensitivities / RX treshhold) and so on. It is nothing you can compute solely by looking on the transmitter. Just as a little example: two laptops equiped with usual WLAN interface adapters may have a transmission range of 300m in an open area. But with good external antennas you can boost this whithout amplification up to 150km (http://www.wifi-shootout.com/). As a personal advice for every WLAN simulation - use the Shadowing (or better) propagation model if possible. I can provide ready to use parameter sets for different environments if necessary. Daniel.
[ns] Throughput Goodput
Hello, Why the goodput measured by [$sink set bytes_] is greater than the throughput measured with [$tcp set ndatabytes_] ?? This means that the receiver get more data than what the tcp sender has sent ?? Julien
Re: [ns] Bandwidth of wireless channel
Vinod schrieb: im working in qos routing in mobile adhoc networks. can anyone tell me why the default value of bandwidth is 0 in link layer of type LL (wireless routing simulation). Does that mean its not used or something else? I can see that the delay value is set to 25us by default. Also, can anyone tell me whether i can have cost param attached to wireless links as we can do in wired? The short answer - there is nothing like a wireless link. Wireless communication uses a broadcast medium. Links are only logically defined by your MAC layer or routing protocol. Additionally you do not have something like a universal bandwidth of the wireless channel. This depends on your technology, modulation schemes etc. So you have to setup this value depending on your model technology (e.g. 2 Mbit/s for a WLAN using BPSK modulation). Daniel.
[ns] how to debug memory?
Hello ns-users, please help Anybody know how to debug memory in ns2? as applied to OTCl objects? I`m use ns-2.29/cygwin(windows) Thanks in advance -- Best regards, skipper-com mailto:[EMAIL PROTECTED]
[ns] generate SIP traffic
Thank you for all the people that help me to implement SIP protocol in NS. Especially the guy that gave me the ns-2.27 patch I’m sorry because I delited the e-mail so I forgot his name so thank you guys !! OK my next part of the project is to trace the traffic from the .tr file generated by the files proxy-test.tcl and redirect-test.tcl with XGRAPH! If anyone had worked with the same project please help me GLORY TO NS COMMUNITY
[ns] graphical interface problem in ns2.29
Hi every body , i try to use a tcl/tk graphic interface , but when i add ns the program declare an error . ex: in example.tcl when i create only widgets and i execute wish example.tcl it 's run very well , but when i add set ns [new Simulator] at the same program , it doesn't execute . Please if there is anyone who know how we can use the graphic interface in ns , i supply him to reply me it's very important . thanks a lot Asma.
