Cool. On 12/21/15 12:58 AM, Jacob Erlbeck wrote: > Hello, > > just for your information: > > we have added active queue management based on CoDel to the osmo-pcu > project (https://openbsc.osmocom.org/trac/wiki/osmo-pcu), which is an > open source software based GPRS-only PCU implementation. > > The implementation is based on > http://queue.acm.org/appendices/codel.html but is deployed as a time > stamp based automaton. It is being applied independently per mobile > station (phone) in downlink direction only. > > The goal was to have PCU based AQM as a last resort if BSSGP flow > control is not sufficient. Since the IP packets are eventually split and > encapsulated within LLC frames which are generally encrypted, the PCU is > not an optimal place to do AQM. Nevertheless it improves the TCP > "experience" and downlink ping latencies under load significantly. > > Kind regards > > Jacob >
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