From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.taht.net (mail.taht.net [IPv6:2a01:7e00::f03c:91ff:feae:7028]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 364943BA8E for ; Mon, 9 Oct 2017 12:53:16 -0400 (EDT) Received: from nemesis.taht.net (unknown [IPv6:2603:3024:1536:86f0:2e0:4cff:fec1:1206]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.taht.net (Postfix) with ESMTPSA id 6193C21425; Mon, 9 Oct 2017 16:53:14 +0000 (UTC) From: Dave Taht To: Cc: , References: <1507534912438.44276@telenor.com> Date: Mon, 09 Oct 2017 09:53:12 -0700 In-Reply-To: <1507534912438.44276@telenor.com> (erik taraldsen's message of "Mon, 9 Oct 2017 07:41:52 +0000") Message-ID: <87376s6z5z.fsf@nemesis.taht.net> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Bloat] emulating non-duplex media in linux qdiscs X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Oct 2017 16:53:16 -0000 writes: > Half duplex is the term you are looking for > https://en.wikipedia.org/wiki/Duplex_(telecommunications) "A duplex communication system is a point-to-point system composed of two connected parties or devices that can communicate with one another in both directions." wifi is not p2p, all data is broadcast to many potential recievers, only one can transmit at one time. Saying that is half duplex, doesn't work for me. In their example of "half duplex", (using push to talk), it still means that everybody on that channel hears who is talking. "half duplex" to me, given the definition of duplex, means more that there is a *p2p* channel (a wire), that you can ping pong data across. This conflation of ideas has always bugged me and I've longed to find another word that more accurately describes what happens, therefore I've been saying "non-duplex". > > Simplex is one way communication like traditional AM radio. wifi/lte are not very similar similar to AM radio. > > Within emulation I'm not sure how to set this up with qdiscs, but you can often set the network interface to half duplex with ethtool. Not sure if this solves your task though. Nope.