Re: [rmcat] draft-sarker-rmcat-eval-test-00, test case 4.4 RMCAT Flow competing with a long TCP Flow

Colin Perkins <csp@csperkins.org> Thu, 01 May 2014 01:55 UTC

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From: Colin Perkins <csp@csperkins.org>
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Subject: Re: [rmcat] draft-sarker-rmcat-eval-test-00, test case 4.4 RMCAT Flow competing with a long TCP Flow
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On 30 Apr 2014, at 07:50, Zaheduzzaman Sarker <zaheduzzaman.sarker@ericsson.com> wrote:
> Are you saying re-ordering is not a phenomena that we can observe in the current Internet? And we should not have test cases to handle re-ordering of packets in RMCAT?

One of my students collected some UDP streaming measurements from our university to hosts on residential networks, covering all the main UK ISPs, a couple of years ago. With everything using wired connections and UDP we saw a couple of hundred packets delivered out of order, from ~250 million packets sent. I can dig into the details of the re-ordering patterns if there’s interest. We didn’t analyse them too closely at the time because packet loss and delay spikes were much more common.

Colin



-- 
Colin Perkins
http://csperkins.org/