On Tue, 4 Jun 2024, Alexandre Petrescu via Starlink wrote: > Le 02/06/2024 à 19:13, Dave Taht via Starlink a écrit : >> Via elon musk: >> >> Starlink just achieved a new internal median latency record of 28ms >> yesterday! Great work by the engineering and operations teams. > > It is indeed excellent news to hear that they achieve such a low latency.  It > is worth noting. > > In addition to fq_codel, cake and libreqos (acronyms I simply cite), if I may > speculate how to further decrease the latency: > > - lower the sat altitudes, maybe at 350km or even at 70km. These are > altitudes where starlink sats seem parked at times, maybe right before > reaching their stable 500km altitudes.  It means they can stay there, maybe > for a shorter time than the times they stay at 500km, but still, for some > time. they do have orbital shells scheduled for the 350km range > - make the antennas on the sats more 'wide-angle' so to speak, such as to > make multiple spots on the ground, possible very distanced, rather than one > single spot straight below the sat. we know that they have several antennas on each sat, and the V2 sats will have more (and probably bigger ones) > - add sat-to-HAP links. (high-alti platforms, i.e. 20km-to-70km), > sat-to-plane, sat-to drone links (altitudes 500m-20km). would those really be much different than the existing ground stations? > - add sat-to-other-constellations' sats links. well, there need to be other constellations to connect to first :-) > - have a dynamic IP routing system between sats and HAPS naturally finding > shortest paths, i.e. lowest latencies. > > I think one could target a 1ms latency. even down at 300Km, and assuming the satellite is directly overhead, that's ~5ms round trip, and to avoid interference with higher satellites, they don't operate directly overhead, I think 10ms is more in the ballpark of theoretical maximum, and a goal of 20ms is aggressive. David Lang > Alex > >> >> - https://twitter.com/elonmusk/status/1797282250574184587 >> >> I of course, am very interested in y'all´s external measurements of how >> well starlink is doing. For me, it is fantastic - 30Mbit uploads nowadays, >> 0 >> latency on the upload (how?) >> https://www.waveform.com/tools/bufferbloat?test-id=2a1d139b-87cb-4ba4-a829-e2167801cffe >> >> I also keep hoping that the rest of the ISP industry is now paying >> attention and deploying stuff like fq_codel and cake and libreqos, but, ah >> well - I will settle for starlink blowing past a lot of dsl and cable and >> finding ways to get their density up. >> >> Anyone going to the Starship launch on the 6th? >> >> >> >> -- >> https://www.youtube.com/watch?v=BVFWSyMp3xg&t=1098s >> Waves Podcast >> Dave Täht CSO, LibreQos >> >> _______________________________________________ >> Starlink mailing list >> Starlink@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/starlink