Please help me to choose too, guys.
Due to direct NLOS between
S and
D points we making
two clear LOS wireless links
via AP-retranslator.
A <---------4.2km--------> S
P <--180m--> D
Two half-links are asymmetrical in distance, but quite in the same direction from AP (may be 7-10 degrees sector).
Now we are using 3
Ubiquity NanoStation2 (sectors, 802.11
bg), giving us 5-8-10Mbit/s -- limited by their poor CPU, anthennas, and affected by noise/interference.
Sometimes later we've made another retranslator-based bridged link, but with 30-40 degrees sector between half-links.
So we've chose pair of Ubiquiti
NanoStation M5 (flat sectors) for AP and
350m Station, but
NanoBridge M5 (solid parabolic dish) for
3.4km Station.
Yes, 5GHz now, not 2.4GHz. All radio transmit power and AP direction tuned to get the same Signal Level of either Stations to AP.
Using 40MHz band MIMO2x2 240-270Mbit/s carrier we've got
55-65Mbit/s Full Duplex by devices' internal test. Not bad, want to reproduce.
Now we plan to upgrade first link's
NanoStation2's to 5GHz band and
802.11n MIMO2x2.
But want to use
Mikrotik SXT/SEXTANT now, not
Ubiquiti, because of narrow AP beam (no need in 60-90 degrees sector), and quite cheaper equipment.
Please, help me to choose the right devices, keeping in mind:
1) One half-link is about 10x closer than another (
180m and
4.2km) -- may be use
SXT, SXT and SEXTANT?
2)
Mikrotik RouterOS License Level (3 or 4) needed to act as AP WDS between two Stations? That's
not PtP as well, but Level 4 is not embedded everywhere...
3) What wireless protocol should we use here -- plain
802.11n, Nstreme or NV2?
4) All router features are not mission critical, just fast ethernet bridge. But link stability, wireless fine tuning, good diagnostic tools are welcome.
Thanks in advance.
P.S. Corrected distances using GPS and Google Earth. Things've got even more complex, guys.