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Groups > alt.internet.wireless > #14441
| From | Jeff Liebermann <jeffl@cruzio.com> |
|---|---|
| Newsgroups | alt.internet.wireless, comp.mobile.android, misc.phone.mobile.iphone |
| Subject | Re: Is there a way to get WiFi NOISE levels for a mobile device? |
| Date | 2015-07-04 10:48 -0700 |
| Message-ID | <l25gpap6kdse5qf7irdtn5b5lrps77mtcj@4ax.com> (permalink) |
| References | (7 earlier) <mn4g0m$cb$2@news.albasani.net> <cvm2j5FkareU1@mid.individual.net> <mn557r$h8j$10@news.albasani.net> <cvmopcFp6uaU1@mid.individual.net> <mn5cci$l3o$3@news.albasani.net> |
Cross-posted to 3 groups.
On Fri, 3 Jul 2015 07:08:02 +0000 (UTC), "Paul B. Andersen" <somebody@somewhere.no> wrote: >"Rod Speed" <rod.speed.aaa@gmail.com> wrote in message >cvmopcFp6uaU1@mid.individual.net > >> My wifi extender is on the same frequency and that's >> no big deal because she only uses it for net radio and >> her grandson for a bit of minor browsing when he's >> there so the half thruput is of no consequence at all. A range extender or wireless repeater (same thing) give me the most problems with streaming video because of the limited size of the various buffers along the path. If you do a throughput test from one of the internet speed tests, or with a local program (iperf3), you'll see that the graphs of the speeds are very erratic and jumpy. That's fine for streaming audio, where buffering 15-20 seconds of music is common, but not for video, where the same buffers might be only seconds long. >> I can set it up the other way and can run a CAT5 >> cable to it too but haven't bothered because I'd >> rather not have the small lightning strike risk. > >Jeff Liebermann knows more about this than anyone, I'm on vacation for a few days would like to avoid doing my standard rant on why wi-fi repeaters/extenders/mesh-networks suck. This is close enough: <http://community.spiceworks.com/topic/988492-why-don-t-wi-fi-repeaters-work-very-well-ok-why-do-they-suck> I also gave a talk on my wi-fi mesh networks suck: <http://802.11junk.com/jeffl/FLUG-talk-2015-02-28/Mesh-talk.doc> which includes some derogatory remarks on repeaters and extenders. The screen grabs show it best. This is 802.11g/n direct (no repeater): <http://802.11junk.com/jeffl/FLUG-talk-2015-02-28/802.11gn%20direct.jpg> and this is through a Netgear something repeater: <http://802.11junk.com/jeffl/FLUG-talk-2015-02-28/802.11gn%20through%20Netgear%20repeater.jpg> Notice that direct is twice the speed and rather consistent, while through the repeater is half the speed and rather erratic. >but, >I generally call your setup a "repeater" while I call >my setup an "extender". A "range extender" and "wireless repeater" are the same thing usually involving a single access point and a single client computah. A "wireless mesh network" is the same, except it usually involves one access point that's connected to the internet, and multiple clients. It's much the same distinction as a wired bridge, which has exactly 2 ports, and a wired switch, which 3 or more ports. In other words, a mesh network is an expanded version of the two port range extender. >The way I understand it, my "wired" extender gets me >the same signal speeds (give or take) as the original >router, while your "wireless" repeater halves the >speed. Nope. They're identical. Both "store and forward" packets. Since only one transmitter can be on the air at a time, this store and forward action produces twice as many packets flying through the air at a time, which reducing the maximum speed. For example, if your direct link between your client computah runs at some speed, at best adding a repeater will cut it in half. Often, it's much worse than half. The exceptions to this are the full duplex repeaters and the cross band repeaters. Both are rather scarce in home wi-fi hardware, but fairly common in mesh networks. The store and forward delay only happens because the repeater cannot transmit and receive at the same time with only one radio. However, by adding a 2nd radio, on a different channel, it can simultaneously transmit while receiving. Similarly, the added 2nd radio can be on a different band, such as 5GHz. There's still a slight reduction in speed, because packets need to be received completely before they can be retransmitted, but since a packet can be received while the previous packet is being transmitted, the maximum speed reduction is not as drastic and certainly not 50%. >Of course, it's a *lot easier* to set up the repeater >because you don't have to run wires (except for power). Sigh. I never could understand the "fear of wires" problem. If you look at advertising photos of computer systems, you NEVER see any wires. They're always hidden from sight. No power cords, no monitor cables, no chargers, no tangled mess of wires that are the bane of interior decorators everywhere. It's like the wired equivalent of the tin foil hat people found among wireless devices. <https://www.google.com/search?q=computers&tbm=isch> I see a few mouse cables, but that's it. >I have no idea about the lightning risk though, but I >have antennas all over the place, so I guess I should >be crossing my fingers. Lightning protection is easy. Do good deeds and you will not incur the wrath of the thunder gods. Yawwnnn... back to sleep. I need my vacation. -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
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Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-01 04:48 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-06-30 22:52 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? chris <ithinkiam@gmail.com> - 2015-07-01 09:56 +0100
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-01 18:52 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-01 22:48 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 05:51 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? chris <ithinkiam@gmail.com> - 2015-07-02 09:08 +0100
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 23:03 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 23:08 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 10:11 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 05:01 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 10:16 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 05:02 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 05:06 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 16:29 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 07:08 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 17:22 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 07:33 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 18:02 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 07:35 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 19:48 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 13:16 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 11:05 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-04 20:25 +0100
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 21:16 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 14:17 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 20:51 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 14:49 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 00:37 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 02:20 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-05 11:03 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 16:25 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-05 10:59 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 16:16 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-05 09:25 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 10:48 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 20:57 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 14:58 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 02:16 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-05 11:00 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 16:13 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-06 01:55 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-06 07:27 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 21:01 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 21:22 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 15:05 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 00:47 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:59 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-02 06:03 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-01 21:59 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 06:46 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 07:00 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 22:00 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 21:59 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 09:23 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:37 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 15:31 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 05:47 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 05:51 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 06:58 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 05:58 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 16:49 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:44 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 15:32 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 06:01 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 17:10 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 07:21 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 17:45 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:48 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:49 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:51 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:55 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 16:18 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 06:52 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 17:17 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 07:25 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 17:59 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 07:21 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-02 14:58 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 22:14 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 09:32 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 10:16 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:24 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-03 04:22 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-03 09:03 +1000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Allodoxaphobia <knock_yourself_out@example.net> - 2015-07-01 21:17 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-01 21:38 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-01 22:40 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 05:37 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 06:00 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 05:58 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-01 22:24 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-01 22:33 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-02 05:50 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? The Real Bev <bashley101@gmail.com> - 2015-07-02 00:01 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? Ant <ant@zimage.comANT> - 2015-07-04 10:57 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? Jeff Liebermann <jeffl@cruzio.com> - 2015-07-04 12:16 -0700
Re: Is there a way to get WiFi NOISE levels for a mobile device? Lewis <g.kreme@gmail.com.dontsendmecopies> - 2015-07-04 22:45 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-05 02:25 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? nospam <nospam@nospam.invalid> - 2015-07-04 22:30 -0400
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Paul B. Andersen" <somebody@somewhere.no> - 2015-07-04 21:09 +0000
Re: Is there a way to get WiFi NOISE levels for a mobile device? Char Jackson <none@none.invalid> - 2015-07-05 11:00 -0500
Re: Is there a way to get WiFi NOISE levels for a mobile device? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-07-05 09:33 +1000
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