<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Propagation delay is just a link delay (the one you configure).</div><div>I forgot to mention the transmission delay which is also simulated by NS-3, and which includes queuing delay and delay placing packet bits on the wire.<br><br>---<div>Alex</div></div><div><br>On May 9, 2013, at 9:03 AM, Xiaoke Jiang <<a href="mailto:shock.jiang@gmail.com">shock.jiang@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html charset=utf-8">Thank you Alex. But what does propagation delay include?<div><br><div><div>
<div><div style="color: rgb(34, 34, 34); font-size: small; background-color: rgb(255, 255, 255); font-family: arial; "><font face="'comic sans ms', sans-serif">thanks</font><br><br><font face="garamond, serif"><font size="4">My Regards,</font><br></font></div><hr align="left" color="#b5c4df" size="1" style="color: rgb(34, 34, 34); font-size: small; font-family: arial; width: 210px; min-height: 1px; "><div style="color: rgb(34, 34, 34); font-size: small; background-color: rgb(255, 255, 255); font-family: arial; "><font face="garamond, serif"><div><span style="font-size: 10.5pt; ">Xiaoke Jiang （蒋小可）</span></div><div><span style="font-size: 10.5pt; "><br></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Ph.D Candidate,</font></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Dept. of Computer Science and Technology,</font></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Tsinghua University, P. R. China</font></span></div></font></div></div>
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<br><div><div>On May 10, 2013, at 12:02 AM, Alex Afanasyev <<a href="mailto:alexander.afanasyev@ucla.edu">alexander.afanasyev@ucla.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="content-type" content="text/html; charset=utf-8"><div dir="auto"><div>Hi Xiaoke,</div><div><br></div><div>The delays that are observed by app-delay-tracer include everything you mentioned (queuing delay, propagation delay, which is related to packet size), except processing delay. This exception comes from the fact that in NS-3 unless you specifically simulate processing delay (which requires additional models), each function call, no matter how complex, is running in zero simulation time.<br><br>---<div>Alex</div></div><div><br>On May 9, 2013, at 8:53 AM, Xiaoke Jiang <<a href="mailto:shock.jiang@gmail.com">shock.jiang@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8">What's more, I am not sure whether the delay includes the router processing time, such as creating PIT entry, Content Store look up , etc.<div><br><div>
<div><div style="color: rgb(34, 34, 34); font-size: small; background-color: rgb(255, 255, 255); font-family: arial; "><font face="'comic sans ms', sans-serif">thanks</font><br><br><font face="garamond, serif"><font size="4">My Regards,</font><br></font></div><hr align="left" size="1" style="color: rgb(34, 34, 34); font-size: small; font-family: arial; width: 210px; min-height: 1px; "><div style="color: rgb(34, 34, 34); font-size: small; background-color: rgb(255, 255, 255); font-family: arial; "><font face="garamond, serif"><div><span style="font-size: 10.5pt; ">Xiaoke Jiang （蒋小可）</span></div><div><span style="font-size: 10.5pt; "><br></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Ph.D Candidate,</font></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Dept. of Computer Science and Technology,</font></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Tsinghua University, P. R. China</font></span></div></font></div></div>
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<br><div><div>On May 9, 2013, at 11:33 PM, Xiaoke Jiang <<a href="mailto:shock.jiang@gmail.com">shock.jiang@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><meta http-equiv="Content-Type" content="text/html charset=utf-8"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi all,<div><span class="Apple-tab-span" style="white-space:pre"> </span>I am trying to get the transmission delay with app tracer. But I am not sure what's concluded in the delay. For example, Queuing time on the router, transmitting time on the wire, etc.</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Can anyone give me any hints? Thank you in advance.</div><div><span class="Apple-tab-span" style="white-space:pre"> </span></div><div>in my file:</div><div><div style="margin: 0px; font-size: 11px; font-family: Monaco; color: rgb(57, 51, 255); "><span style=""> Config::SetDefault (</span>"ns3::PointToPointNetDevice::DataRate"<span style="">, </span><span style="color: #006141">StringValue</span><span style=""> (</span>"10Mbps"<span style="">));</span></div><div style="margin: 0px; font-size: 11px; font-family: Monaco; color: rgb(57, 51, 255); "><span style=""> Config::SetDefault (</span>"ns3::PointToPointChannel::Delay"<span style="">, </span><span style="color: #006141">StringValue</span><span style=""> (</span>"1ms"<span style="">));</span></div></div><div style="margin: 0px; font-size: 11px; font-family: Monaco; color: rgb(57, 51, 255); "><span style=""><br></span></div><div style="margin: 0px; font-size: 11px; font-family: Monaco; color: rgb(57, 51, 255); "><span style=""><br></span></div><div style="margin: 0px; font-size: 11px; font-family: Monaco; color: rgb(57, 51, 255); "><span style="">And is the delay related to packet size?</span></div><div><br><div>
<div><div style="color: rgb(34, 34, 34); font-size: small; background-color: rgb(255, 255, 255); font-family: arial; "><font face="'comic sans ms', sans-serif">thanks</font><br><br><font face="garamond, serif"><font size="4">My Regards,</font><br></font></div><hr align="left" size="1" style="color: rgb(34, 34, 34); font-size: small; font-family: arial; width: 210px; min-height: 1px; "><div style="color: rgb(34, 34, 34); font-size: small; background-color: rgb(255, 255, 255); font-family: arial; "><font face="garamond, serif"><div><span style="font-size: 10.5pt; ">Xiaoke Jiang （蒋小可）</span></div><div><span style="font-size: 10.5pt; "><br></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Ph.D Candidate,</font></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Dept. of Computer Science and Technology,</font></span></div><div><span style="font-size: 10.5pt; "><font color="#666666">Tsinghua University, P. R. China</font></span></div></font></div></div>
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