From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bobcat.rjmcmahon.com (bobcat.rjmcmahon.com [45.33.58.123]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 242C53B2A4 for ; Sun, 12 May 2024 18:59:38 -0400 (EDT) Received: from mail-yb1-f170.google.com (mail-yb1-f170.google.com [209.85.219.170]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by bobcat.rjmcmahon.com (Postfix) with ESMTPSA id 34F831B25E for ; Sun, 12 May 2024 15:59:37 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 bobcat.rjmcmahon.com 34F831B25E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rjmcmahon.com; s=bobcat; t=1715554777; bh=+3YmvfYYugo1FwKkrIawneX13ErM1GrB2fci5uMWEiY=; h=From:Date:Subject:To:From; b=gfEAOhsxS0yOfRyplc4MD8SF8Cbxc0T0hJDVGmywtJ/4XsDRN84kt6ldWiF9sIfq2 SmHsQSnLXOcuEsn6l29ZJ5YzXvKT+EFTeDr1tKetmWXEqQnfUyjPoQDZ5djgwYaGMh /Jk5oXhcK9UMzEURcj07bOn1btgGiXjd/AEAl2Hc= Received: by mail-yb1-f170.google.com with SMTP id 3f1490d57ef6-de4665b4969so4093411276.2 for ; Sun, 12 May 2024 15:59:37 -0700 (PDT) X-Gm-Message-State: AOJu0YyVTClOIwBpukyJvZj6GecanUw/C4pfXvvLChCgYUAjmgTg4HPY wPvf+r+5bqfD7au0s20hwVSH3SQp2Gg7j8t5sL3/Vv9JnaSi/8Ozz7cAkfg4H7obPiNUkQFxm0V tztf9StHl9JzaB7c5Jla0UYcEhv8= X-Google-Smtp-Source: AGHT+IF77xRLy0OmQWk/qnvhs6qjAXWMg1gfrSOnYwhsuaTSp7qqAujtslCQPOrx/LORyMUzyLb9hxPDklElgW1RH4I= X-Received: by 2002:a25:ad90:0:b0:de1:2874:730c with SMTP id 3f1490d57ef6-dee4f33bd2bmr9713410276.26.1715554776157; Sun, 12 May 2024 15:59:36 -0700 (PDT) MIME-Version: 1.0 From: Robert McMahon Date: Sun, 12 May 2024 15:59:22 -0700 X-Gmail-Original-Message-ID: Message-ID: To: make-wifi-fast@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Make-wifi-fast] Solicitation: SW engineers for better in home networks X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 12 May 2024 22:59:38 -0000 Hi All, My apologies for this solicitation. Please feel free to delete now and/or let me know if there is a better list for this type of email. Disclaimer: This email is not communication per my employer. These are my thoughts & opinions only. I'm hoping to facilitate an open source software and networking team to improve in home networks. Though a "moon shot", this may be a way to define radio heads connected by high speed serial links such that open source packet and transport engineers can better serve wireless in home networks via distributed radio heads & waveguides. The MAC/PHY interface over a serial link needs to be defined well in an open manner as an example. Note: The radio heads are not the same as APs but closer to a port ASIC connected to 802.3 switch fabrics. Please reach out to me at rjmcmahon at rjmcmahon dot com if this is of interest to you. I think it starts with coding up a prototype and asking installers like comm-tract to deploy some units in historic Boston neighborhoods. The main idea is to use a fronthaul network (some call this backhaul) in a home and support multiple remote radio heads, e.g one or more per room. The radio heads are effectively front end modules, CMOS radios, PHYs and a lower MAC (802.11 bridges) connected over a fronthaul network to a concentrator function. This will solve a few major problems o) Address AP/STA power imbalance o) Significantly reduce AP/STA density and reduce Wi-Fi access delays and provide low latency o) Reduce the noise floor via reduced power o) Provide for active redundancy at the PHY level I expect more things too. (This architecture is analogous to eCPRI and DAA and, for those that followed the ethernet switching evolution, this is very similar to the early days of Crescendo, Cisco's first acquisition which went from a concentrator to switching bus to a CLOS switch fabric.) My expectation is that the fronthaul links will be fiber. This is because of market and NRE including power reasons, the bend ratios and pull strength of modern fiber from companies like Corning. Also, signal loss over copper at 100Gb/s is in dB per inch, while it's ~0.5dB per Km over fiber and independent of modulation. Though early adopters may prefer copper or even point to point wireless. The fronthaul design should be waveguide agnostic though it will likely need to carry last meters wireless information. As many know, I call the fiber version of this Fi-Wi. I think it finally solves many of our in home networking problems. >From Paul Baran in 1994 o) Shorter range rf transceivers connected to fiber could produce a significant improvement - - tremendous improvement, really. o) A mixture of terrestrial links plus shorter range radio links has the effect of increasing by orders and orders of magnitude the amount of frequency spectrum that can be made available. o) By authorizing high power to support a few users to reach slightly longer distances we deprive ourselves of the opportunity to serve the many. o) Communications systems can be built with 10dB ratio 0) Digital transmission when properly done allows a small signal to noise ratio to be used successfully to retrieve an error free signal. And, never forget, any transmission capacity not used is wasted forever, like water over the dam. Not using such techniques represent lost opportunity. Here's a larger list of goals: o) Be in the upgrade realm of the homeowner (empowered to improve one=E2=80=99sprimary asset) o) Built using a future proof and long lived cable plant and long lived concentrator o) Life support capable, e.g. can carry smoke detector signals with high reliability such that fire codes will accept them as viable o) Maximize return on labor required to install by judicial selection of parts and equipment o) Fault tolerant & resilient through active redundancy o) End devices be free of all tethering o) Be secure and mitigate vulnerabilities o) Support low & efficient & balanced power, leverage spatial & time dimens= ions o) Performs in both capacity and low latency o) Support all the future sensor technologies including in home location technologies o) Support remote management & devices by ISP o) Support single dashboard for homeowner o) Consolidate all wireless to 802.11 to minimize technician skills Thanks, Bob McMahon