<p>What has the wireless link got to do with it? The same is true of a wire. The contention is for shared media, or shared buffer.</p>
<div class="gmail_quote">On 7 Mar 2013 21:58, "Detlef Bosau" <<a href="mailto:detlef.bosau@web.de">detlef.bosau@web.de</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Am 06.03.2013 08:20, schrieb Jon Crowcroft:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
congestion control does work on some single links if the link layer<br>
supports a congestion feedback mechanism - switched ethernet (for<br>
example) has a feedback mechanism and some people have used this in<br>
data center modifications and used it to push the later 2 feedback<br>
up (as well as back) to IP/TCP - ie trigger ECN from the layer 2<br>
</blockquote>
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Assumed that ECN is not lost.<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
this could easily also be done with contention information in<br>
conventional and wireless ethernet on a single link<br>
and could be triggerd from a cellular base station too if<br>
you like<br>
<br>
but it isn't<br>
<br>
but it could be...<br>
</blockquote>
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Frankly spoken, I don't see the need for congestion control in mobile links and WiFi. In these networks, we hardly have a full packet on the link, so sliding window per se is nonsense in these technologies. A simple use of stop'n wait would solve the problem.<br>
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Detlef Bosau<br>
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</blockquote></div>