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NetworkManager Will Now Roam For WiFi Signals More Aggressively

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  • #11
    Originally posted by starshipeleven View Post
    Does a country where 46 people are killed per day care about that? Because that's USA.
    I would prefer not to talk about this topic on this forum, but the lack of consideration prompts me to highlight a few things...

    USA has estimated 332 million people. ZA has estimated 57 million people. If you compare the stat (46) from your post compared to the 2019 stat (58) and take population into account then a person living in ZA's chance of getting murdered is increased by 734% compared to someone living in USA. The official stats, that I mentioned, are based on end of March 2018 to end of March 2019 which was before the xenophobic attacks started that's currently taking place here, murder is expected to rise in 2020.

    I'm not looking for a pity party, on the contrary I think the average South African and foreigners-in-ZA are doing a great job trying to work hard and keep order. If you do not agree that there's a connection between corruption and murder then we can agree to disagree.

    Back on topic... IMO the amount of WISPs and ISM band congestion is going down in my area. Not due to regulations that are enforced, but rather due to reduced demand for internet over long range WiFi links. Government owned monopoly on landlines has been decreased drastically over the past 15 years. Investing in fibre is a no-brainer in urban areas (now that it's legal).

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    • #12
      Originally posted by Jabberwocky View Post
      I would prefer not to talk about this topic on this forum, but the lack of consideration prompts me to highlight a few things...
      I'm not the one using murder statistics to judge a nation's interest in enforcing radio laws, I'm just pointing out that it's tangential here.

      For example in EU you could literally run around with a KW-range radio emitter (say a poorly shielded cheap microwave oven, no shortages of that) and none would even notice, and it would not cause much disruption either. Someone will curse at their smartphone provider and that's it.

      But then you get wifi routers that by law have to prolong boot times by 5 minutes or so to sense the 5Ghz frequencies used by local air traffic radars or some shit to avoid interfering.

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      • #13
        Originally posted by SystemCrasher View Post
        At -80 dBm most wireless radios I've seen would be in "barely works" state, losing numerous packets, it wouldn't reasonably support e.g, watching video, except maybe few lowest youtube resolutions. Granted roaming only happens if there is something better found, I'm not sure how it can make things worse. Though it also subject to SNR, in desert -80dBm would be survivable, but in typical city it means signal is badly damaged by nearby wi-fi signals so it rarely makes through and overall performance is utter crap.
        Agreed, -76dB seems to be the point where TCP starts going to hell with 802.11ac. But keep some statistics on your stations and you'll find that they can vary +-20dB as seen by the client. One of those stations will be the best, even if it's at -76dB and another one temporarily shows -60dB. Also, dB knows nothing of congestion. If NetworkManager doesn't use a higher intelligence than relative dB at a given point in time then this is going to be a disaster.

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        • #14
          Exact -dBm depend on radios, they also have certain inaccuracies, 80dBm reading could mean -78dBm in air. Or -82dBm. Or something. Different radios would show different numbers. At whch point radios with overlyoptmistic readings going to suffer even worse. Also radios would usually go for lower modulations, but -80dBm is barely workable for lowest .g modulations, slow and taking plenty of airtime (=risk of airtime problems in "dense" environments). So if it reads -80dBm ... one really better using something else at this poin, if there was such option. Even iDevices eventually show strange behavior being very reluctant to give up on weak AP, even if it barely transfers any data at all, while there is awesome powerful AP nearby, so manual re-connection immediately fixes that. But I thought point of automatic roaming is to ensure user do not have to do that manually.

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