[ns] NS-2 over Slackware for wireless network emulation
Hi, I do not have an experience on any version of Linux, but I will use Slackware version of it for my project. I want to install NS-2 over my Slackware operating system. Can I find any tutorial to this over Slackware? Or just the installation of NS-2 is the same everywhere ? The another important question: Does NS-2 work over Slackware ? In fact, I want to emulate my wireless network using RTP, RTSP protocols, but also the whole background wireless network issues altogether like UMTS, GSM etc... (packet delay, bandwidth limitations, packet loss etc...) NS-2 is a simulator, but I found that we can use it as an emulator for wireless networks. (by some patchs for NS-2) That is the reference: http://nsnam.isi.edu/nsnam/index.php...s_and_Mobility http://nsnam.isi.edu/nsnam/index.php/Contributed_Code#Wireless_and_Mobility Do you think that NS-2 can be used as an emulator in this situation ? Or shall I find myself an another emulator ? Thanks... Help needed soon :)
[ns] how to extract the priority and the size of the contention window of a flow
hi all, i m trying to implement a new routing protocol on ns (ad hoc network) and i want to know if there is anyone who know the function or how to procedure to extract the priority and the size of the contention window of a flow. Thanks a lot. -- B!LEL [EMAIL PROTECTED] +33 (0)620463904
[ns] problems with leave-group in C++ level
Hello, I met an error as follows when I ran make in terminal in one of my
C++ files:
Tcl::instance().evalf([{%s} set node_] leave-group {%s}
{%d},name(),name(),groupaddr);
Error:
rccmp/rccmprecv.cc:351:error: `groupaddr´ no se declaro en este ambito.
How can I indicate the group I wnat to leave?
Thanks
Re: [ns] cbr generator
Hi, as far as I understand, seed is the base value for the random number generator, i.e. when you chose a seed (other than 0) when you run the generation twice with the same parameters, the generation results will be the same on both runs. rate is the sending rate of the generated connections, e.g rate 200 means 200 pakets per second, so one packet every 0.05 seconds. hope that's all correct. best, -Matt Am Samstag, 30. September 2006 14:04 schrieb [EMAIL PROTECTED]: Date: Sat, 30 Sep 2006 11:55:13 + (GMT) From: ns user [EMAIL PROTECTED] Subject: [ns] cbr generator To: ns-users@ISI.EDU Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; charset=us-ascii dear all; i'm using cbrgen.tcl script to generate cbr traffic. to do this i need to set some parameters. so my problem is that i don't know the meaning of the two parameters : seed and rate. urgent, help me please. kindly
[ns] how do i transfrom Bit Error Rate to Packet Error Rate?
Hi all, how can I transform “Bit error Rate” to “packet error rate”? Is there any formulas for this ? Can any body help me?
Re: [ns] how do i transfrom Bit Error Rate to Packet Error Rate?
As far as I know, the relationship between BER and PER , assuming that bit errors are independent and uniformly distributed is, PER=1-(1-BER)^N where N is the number of bits. However, the above formula is only approximate because in real life scenarios, the bit errors are not completely independent but may occur in bursts. Further, the error distribution is also not exactly uniform. Hope it helps Cheers, Abdul. 林泰邑 wrote: Hi all, how can I transform “Bit error Rate” to “packet error rate”? Is there any formulas for this ? Can any body help me?
[ns] FW: how do i transfrom Bit Error Rate to Packet Error Rate?
-Original Message- From: 林泰邑 [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 6:39 PM To: 'Abdul Jabbar' Subject: RE: [ns] how do i transfrom Bit Error Rate to Packet Error Rate? for example : when I give ber=10^-3, packet size=1000bytes, what is PER? -Original Message- From: Abdul Jabbar [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 6:24 PM To: 林泰邑 Cc: ns-users@isi.edu Subject: Re: [ns] how do i transfrom Bit Error Rate to Packet Error Rate? As far as I know, the relationship between BER and PER , assuming that bit errors are independent and uniformly distributed is, PER=1-(1-BER)^N where N is the number of bits. However, the above formula is only approximate because in real life scenarios, the bit errors are not completely independent but may occur in bursts. Further, the error distribution is also not exactly uniform. Hope it helps Cheers, Abdul. 林泰邑 wrote: Hi all, how can I transform “Bit error Rate” to “packet error rate”? Is there any formulas for this ? Can any body help me?
Re: [ns] how do i transfrom Bit Error Rate to Packet Error Rate?
If you plug the values in the formula PER=1-(1-0.001)^8000 = 0.9996658 The above result implies that 99.96% of you packets will have errors and if there are no additional error correction mechanisms, they will be dropped/lost. A BER of 10^-3 is too high and is not practical. For example, in most wireless scenarios, the BER is assumed to be 10^-6. By the way, why are you posting this in ns-users list? Abdul. 林泰邑 wrote: for example : when I give ber=10^-3, packet size=1000bytes, what is PER? -Original Message- From: Abdul Jabbar [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 6:24 PM To: 林泰邑 Cc: ns-users@isi.edu Subject: Re: [ns] how do i transfrom Bit Error Rate to Packet Error Rate? As far as I know, the relationship between BER and PER , assuming that bit errors are independent and uniformly distributed is, PER=1-(1-BER)^N where N is the number of bits. However, the above formula is only approximate because in real life scenarios, the bit errors are not completely independent but may occur in bursts. Further, the error distribution is also not exactly uniform. Hope it helps Cheers, Abdul. 林泰邑 wrote: Hi all, how can I transform “Bit error Rate” to “packet error rate”? Is there any formulas for this ? Can any body help me?
[ns] FW: how do i transfrom Bit Error Rate to frame Error Rate?
_ From: Tai-Yi Lin [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 7:29 PM To: 'ns-users@isi.edu' Subject: [ns]how do i transfrom Bit Error Rate to frame Error Rate? Hi all, how can I transform Bit error Rate to packet error rate? Is there any formulas for this ? Can any body help me? Is Packet error rate and frame error rate same?
[ns] how to extract the priority and the size of the contention window of a flow
hi, there is someone who can help me : i want to display the priority and the size of contention window of every flow on the ad hoc network simulation by modifiying the mac-802_11.cc thanks ! -- B!LEL [EMAIL PROTECTED] (+33) 6 20 46 39 04
[ns] Multi-channels, multiple interfaces for ns2.29
Hi all, I'm currently working on a project about OLSR with multiple channels wireless mesh network. I've seen some online tutorials on how to integrate multi-channel in ns2.26 and ns2.29 from W.H.Q and Wang Bo respectively, but still has no luck to make it works. I would like to know if there is anyone successfully implemented the multi-channel with any routing protocol in ns2.29. Also, could you please point out which step they are missing and share your experience on it. I'm really appreciate any comments you provide. thank you Best regards, Ho Lun, Ho (tanky) School of Information Technologies The University of Sydney
[ns] tracing errors in wireless scenario
Hi, I'm running wireless 802.11 simulations in ns-allinone-2.29 and I'm having some problems tracing the errors. When I insert an error model in my tcl script I cannot see any dropped packet in the resulting trace file. I inserted an uniform error model with rate 0.2 (20% of the packets should have errors) using the option incomingErrProc in node-config. I've checked the c++ code that models the errors and I've seen that it doesn't drop the packets, it only marks the packets with the error flag (line 193 of errmodel.cc). Then the mac layer checks if there is an error (line 544 of mac-802_11.cc) and if there is any error calls the function Packet::free(p). This Packet::free function (line 362 of packet.h) has no code, it does nothing. How can I then trace the packets that contain errors? Should I change the c++ code of the function Packet::free() in order to be able to trace these packets? Is there a more simple way to trace them? Thanks, Guillermo
[ns] how to use error model
hello everybody, i want to use error model in ns2 in queue/errmodel.h there are two state error model,Complex Two State Markov Model,Multi State Error Model are they work independently? what i need is multi state error model Could anyone tell me how to use that?
