Mimosa GPS Sync and Network Design


#1

We are interested in the Mimosa radios featuring GPS sync, however we use multiple VLANs and network segments. If individual radios are isolated I’m guessing they will not be able to sync with each other. Is this correct? Is there a way to allow the collocated radios to talk among themselves while not exposing the data traffic between the radios?


#2

GPS Sync is all done by transmission timing, the radios do not need to be able to talk to each other in any way. Basically, you set them up to not interfere with each other.


#3

I was my understanding that the radios communicated using Ethernet broadcasts.


#4

If that were the case there could be no GPS sync between two different WISPs, which is covered in their Co-location stuff in their B series instructions and I am sure is somewhere in the A5 paperwork, but I can’t find it at the moment.
http://backhaul.help.mimosa.co/backhaul-faq-gps-glonass


#5

So then the radios just listen and adjust timings based on the surrounding transmissions they hear?


#6

No, they listen to GPS timings and know when to transmit/receive based on that. The whole system is reliant on the internal timing of the A5/A5c which is adjusted by the GPS signal.


#7

Ok but GPS is receive only, how does Radio A know what Radio C is doing?


#8

it doesn’t, you program them to miss each other as is shown in the GPS setup guide for the backhauls as well as here:
http://ap.help.mimosa.co/ap-ug-wireless-configuration
With notes here:
http://ap.help.mimosa.co/srs-switching-from-wifi-interop-to-srs
and here:
http://ap.help.mimosa.co/gps-sync-spectrum-reuse-gigapops , http://ap.help.mimosa.co/gps-sync-spectrum-reuse-micropops
and here:
http://ap.help.mimosa.co/ap-troubleshooting-gps-signal-strength