Subscribers on same path caused degraded performance


I am experiencing significant degratation following the instalation of additional subscribers that are close to each other and also are mostly on the same path towards my tower AP.

Subscribers are at 6.5 KM and it most customers in the zone are served by WISPS, is there anything i can do to mitigate interference ??

In one case i have three customers that are all of them in a aligned towards the AP separation between them less than 50 meters in a Z axis ,X  axis or horizontal separation is  5 to 10 meters, same as Y axis or vertical separation

I am thinking to add an additional tower closer to the zone and direct some subscribers to that tower and some subscribers to the existing tower

AP is EPMP 1000 with Cambium Sector antenna, Subscribers are all EPMP Force 200


All of them on the same path isnt a problem. We’ve got groups of 20 cpes just 20 meters apart all over the place. The problem can come from a single customers router that close, likely the nearest cpe to your tower in the group. If you can check what wifi channel they are all using and change as needed, if a competitive wisp is interfering, try to coordinated with them


We have two customers in a rental house - one upstairs and one downstairs.  They each have their own SM's and they are both mounted on a wood pole right above each other.

In our experience (due to the scheduler) this work just fine.  Each of the SM's will transmit on it's own schedule and they shouldn't interfere with each other.  And they will both go into 'listen' mode at the same instant, and listen to the AP transmit data/schedule, so again, there should be no conflict with Cambium.

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If you can check what wifi channel they are all using and change as needed

Yeah, it'd really be awesome if there was some way to do a 'site survey' or a 'detect' and to be able to tell what is using what channels and interfering at a cutomer's site, without having to drive there.

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like as in eDetect?

@Cheree King wrote:

like as in eDetect?

Well, eDetect shows interferers if they happen to be on the exactly same channel and width as the SM.  So in most cases, that doesn't tell us anything and we usually have to drive to the customer's house in order to diagnose their problem.

So, for example, if you're currently on Channel 2432, and the customer's router is on channel 2437, it'll absolutely still be stomping on each other and interfering, but there's no way to see that from the store.  We'd have to drive to their house and use some other method to find what channel their router is on.

@we usually run our ePMP 2.4ghz gear in 10 Mhz widths (since there are so few 2.4 channels to start with) and we find the performance is generally great with the ePMP @ 10 Mhz. But, everyone's router's are in 20 or 40 Mhz widths usually, so eDetect will happily report that there's no interferers, even when there are.

And you can't run a Spectrum Analyzer remotely either, so again - no way to tell what's interfering at the client's house without driving there.

OR - let's say your on 2432Mhz and you're pretty sure that's bad for a customer, and you're considering trying another channel - let's say 2457Mhz - to see if it's better or worse for your client's performance.  There's no way eDetect can tell you BEFORE YOU TRY that if that'll interfere with something differnt at 2457Mhz or not.  So, you can't predict or plan, you have to basically set the AP to the new channel and have everyone re-associate, and then do an eDetect to see if it's now going to detect any interferers.  Basically everything else we've ever used can do a scan and see whatever is broadcasting, the SSID, the RSSI, etc - and we can plan from there.

Currently with ePMP, if you suspect he client has an interference issue, I don't know of any way to really detect or diagnose it without driving to his house and using some other brand of radio to diagnose.