Last week or so I had a short peek on the lists and read something alike 'half-duplex makes wifi feel slow [in addition to the point in discussion and when compared to wired]'. Now couldn't find the message to reply to the sited one but going on with this one.
Half-duplex brought me to a news item national IT press was buzzing about few months ago: Taneli Riihonen's doctoral dissertation "Design and Analysis of Duplexing Modes and Forwarding Protocols for OFDM(A) Relay Links" [1]. 1 http://taneli.riihonen.fi/ "Taneli Riihonen - List of Publications" The fuss news media made out of the research was, that the methods Riihonen found will solely speed up 5G cellular networks. Amusingly I saw a picture a news outlet run out, where Taneli Riihonen was standing and in the background a slide showed text "OFDM". I thought what the heck, this isn't just about 5G, who cares about 5G. Then forgot the news and now got flashback. This might be old news/tidbits for the list, but one can't never be sure, so passing on as in the back of my head are Dave Täht's words that a lot of new research and reading old was made for accomplishment in current state of bufferbloat in wired connections. Getting to the on-the-air-timings spoken about below, the methods Taneli Riihonen found in his dissertation used statistical methods for time slotting the "shout out" and "listen to" for duplexing on the air. Intuitively this brings me to expect that the dissertation might give ideas how to measure timings for tx and rx, and, in the best case readily usable, tools how they have proved their theory in the theses. Sorry I haven't even glimpsed the 300 pages thesis. I'm only basing on slides linked to in the same paragraph as the thesis on the above web-page. Unfortunately the slides are in finnish. -Erkki * Aaron Wood <wood...@gmail.com> [2016-02-09 06:17:57 +0800]: > I've often wanted the same thing: What's the time-length of given packets > (using various transmission rates), and the inter-packet delays, etc. What > _is_ 100% channel utilization, in terms of packets per second of a given > size/rate? > > From a pcap file full of radio-tap-level packets, can the channel usage be > computed? (none of the tools I looked at a few years ago could give me a > channel usage indication from an analysis of actual packets (with rates and > timestamps)). > > -Aaron > > On Tue, Feb 9, 2016 at 4:02 AM, Dave Täht <d...@taht.net> wrote: > > > Much more readable than the spec! > > > > http://chimera.labs.oreilly.com/books/1234000001739/ch03.html > > > > I still keep hoping for a comprehensive list (or a tool) for timings for > > every possible operation across all the 802.11 standards. Trying to > > figure out how long things take "on the wire" makes my brain spin. > > > > _______________________________________________ > > Cerowrt-devel mailing list > > Cerowrt-devel@lists.bufferbloat.net > > https://lists.bufferbloat.net/listinfo/cerowrt-devel > > > _______________________________________________ > Make-wifi-fast mailing list > make-wifi-f...@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast _______________________________________________ Cerowrt-devel mailing list Cerowrt-devel@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cerowrt-devel