ExtremeWireless (WiNG)

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Outdoor WLAN for 1.300.000 sqm. in below zero conditions

  • 1.  Outdoor WLAN for 1.300.000 sqm. in below zero conditions

    Posted 11-20-2018 07:50
    Hi experts,
    We are facing a challenging issue with a huge plant of an existing customer, that needs to deploy a WLAN in a really big territory with metal scrap. The area is about 1.300.000 sqm and mostly during the year the temperature is below zero Celsius.
    We are investigating the possibility to cover the area with AP 7562 with mesh on the one band and for the traffic the second one.
    The challenge in this case would be the temperature and the metals that the area is full off, such as old iron parts for scrap.
    Has anyone done a similar project and has any experience in such big areas WLAN?
    Looking forward to have your inputs on these.



  • 2.  RE: Outdoor WLAN for 1.300.000 sqm. in below zero conditions

    Posted 11-20-2018 10:09

    We did about the same, but on 200+ dual AP6532 with custom PVC enclosure. Before start, we did some comparative research for AP7161 and AP6532 and choose AP6532 to stay in budget.

    Main problem of "about zero" weather conditions is moisture condensing inside non-secured cables and enclosures.

    Our bottleneck was performance on Mesh MCX, that didn't cover our high-density WiFi requirements. Then we switched to use network boxes for PoE and optical Ethernet network with MCX on backup.

    We built carrier network with pre-terminated FTTH fiber and fanless gigabit switches with two 1GigE SFP + 8x 1GigE PoE+. Each network box served six AP's and additionally equipped with two IP-CCTV cameras. Power supply protected with 620VA smart UPS.

    No additional heating or cooling required to keep heat balance inside boxes and enclosures within normal range. It was -25C (winter) to +40C (summer).

    Works stable for five+ years.

    Best wishes,

    Dmitry Solovyov

  • 3.  RE: Outdoor WLAN for 1.300.000 sqm. in below zero conditions

    Posted 11-20-2018 12:40
    AP7562 would be a good fit for a deployment like this - using MCX. Temperature would not be a problem for this AP.
    As Dmitry mentioned though, if you have high throughput requirements, you might find that you need to install some actual network drops throughout the area to create Root Node MCX APs. Otherwise, you could end up with mesh backhaul connections that are making many hops from a client all the way back to a networked Root Node AP. Each of those hops cuts your bandwidth in half. Ideally, you want to stay under 3 hops.

  • 4.  RE: Outdoor WLAN for 1.300.000 sqm. in below zero conditions

    Posted 11-20-2018 15:04
    Thank Dimitri and Chris for your prompt replies, these are my concerns too.

    Chris can the mesh connections be configured to use as less hops are possible? I mean with my experience to a similar one with AP6562 it always changed the backhaul connections depending on a algorithm or it's own. Do you have any guide for this?

    Thank you once more,


  • 5.  RE: Outdoor WLAN for 1.300.000 sqm. in below zero conditions

    Posted 11-20-2018 15:31
    The MCX configurations do allow you to customize things a bit. For most deployments, the standard configuration works perfect...but if you really want to customize things, it has that ability.
    Based on the setup though, the system will determine the actual BEST path to use to get to one of the Root nodes (AP with a network connection).

    There is no direct configuration option though that tells the system - use the fewest hops possible. But based on the way that the algorithms work, this is essentially what will end up happening anyway when the MCX routing protocol determines the best path. If you want, you can even statically define your *preferred* neighbor mesh AP and *preferred* root node AP such that the system will use your preferred devices in the event that there are multiple options of equal value.

    How I would approach this deployment:
    When you begin your AP layout plan, if you have any current network drops in the area, you would first place APs in those locations (predictive survey or whatever), then you would continue with the layout/survey based on the assumption of those first root node APs existing in those spots.

    From there, you would figure out where all of the other APs need to be based on coverage (determined by throughput needs, antenna types, etc). Then, if you say that you never want more than 3 hops, you look at the layout you now have of these APs and see if there are any areas where more than 3 hops would be needed to reach a root node AP. If there areas like this, then you would need to run an additional network drop to somewhere in that area to prevent the 4th hop. Continue doing this until there's never more than 3 hops needed. The challenge with this most times though is either the cost of running those network drops or simply that it cannot be done, regardless. If that's the case, then you have to get creative (create a sort of virtual root node by have a non-root node connect back using a Point to Point connection to a root node (would only help though if more than 1 hop would have been needed after that AP)

  • 6.  RE: Outdoor WLAN for 1.300.000 sqm. in below zero conditions

    Posted 11-20-2018 15:36
    Thank you Chris for the input. Really helpful.