<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Mudasir,<div class=""><br class=""></div><div class="">the default mechanism for recovering lost packets has been implemented on the consumer-end, and is based on RTT estimations. The consumer estimates the RTT to the producer, if a data packet is not received within this amount of time, then the consumer will retransmit.</div><div class=""><br class=""></div><div class="">There is another mechanism that can is performed on layer 2 by NFD, which is a hop-by-hop best effort loss recovery scheme and has to be separately enabled in the simulations.</div><div class=""><br class=""></div><div class="">Thanks,</div><div class=""><br class=""><div class="">
<div class=""><div class=""><div class=""><span class="" style="float: none; display: inline !important;">Spyridon (Spyros) Mastorakis</span><br class=""><span class="" style="float: none; display: inline !important;">Personal Website: </span><a href="http://cs.ucla.edu/~mastorakis/" class="">http://cs.ucla.edu/~mastorakis/</a><br class=""><span class="" style="float: none; display: inline !important;">Internet Research Laboratory</span><br class=""><span class="" style="float: none; display: inline !important;">Computer Science Department</span><br class=""><span class="" style="float: none; display: inline !important;">UCLA</span></div><div class=""><span class="" style="float: none; display: inline !important;"><br class=""></span></div></div></div><div class=""><br class=""></div><br class="Apple-interchange-newline">
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<br class=""><div><blockquote type="cite" class=""><div class="">On May 21, 2018, at 10:14 AM, Mudasir Qazi <<a href="mailto:mudasirqazi00@gmail.com" class="">mudasirqazi00@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">Hi,</div><div class=""><br class=""></div><div class="">I have a general question about the recovery of a lost packet in ndnSIM 2.3. Let's say, we have a consumer (ndn-consumer.cpp) which has requested packets ( '/prefix/%FE%00', '/prefix/%FE%01' and '/prefix/%FE%02' ) in a sequence. The producer (ndn-producer.cpp) replied with the data packets. Let's say some how, data reply of '/prefix/%FE%01' is lost and never received at consumer. How the consumer will get those lost data packets? Would it send request for next packet i.e., '/prefix/%FE%03' or it will send request of '/prefix/%FE%01' again? What phenomenon is used in ndnSIM 2.3.</div><div class=""><br class=""></div><div class="">(please answer with the code file name and methods which are called to recover a lost packet)<br class=""></div><div class=""><br class="">-- <br class=""><div dir="ltr" class="gmail_signature"><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><div dir="ltr" class=""><div class=""><span style="font-family:georgia,serif" class="">Regards,<br class=""></span></div><div class=""><span style="font-family:georgia,serif" class="">Mudasir Qazi<br class=""></span></div></div></div></div></div></div></div></div></div></div></div></div></blockquote></div><br class=""></div></body></html>