Alvarion BreezeACCESS Bridge 23dBi 1ft. panel antenna. 36 Mbps Max. data rate, 5.8 GHz > (NLOS) > OFDM The BreezeACCESS LB delivers a comprehensive range of product features, ensuring fast, consistent, and reliable data and IP-oriented services, including:
Is it NLOS !? compared with wifi ? Is it better than dual nstream ? any one try alvarion products ? Or it’s just the same blabbing about wimax as “a new market” ?
NLOS has been a marketing buzzword every since OFDM came to market; probably before that. It is mostly meaningless. Alvarion is very conservative in the marketing, so it’s surprising they use the term. Probably there are no trees where their Israeli HQ is. OFDM does a little better than non-OFDM (trango) 5 ghz gear around urban multipath, so that’s probably the limit of the application of NLOS. I’ve seen all common brands of 5ghz gear, including Alvarion get pretty messed up by a tree in way.
I have personally talked with a few of the companies that are rolling out 5 GHz WIMAX products. The term NLOS for some people means Non-LOS, for others it Near-LOS, for the most past most WIMAX NLOS refers to Near-LOS. When I asked about performance there was no doubt that the WIMAX platform could outperform a standard 802.11a platform (31 Mbps vs. 14 Mbps @ 10 MHz channels), however when asked about performance in NLOS situations they said the % loss from obstruction would be similar (I expected this). The end result would be WIMAX outperforming 802.11a but it comes from spectrum efficiency. If you can’t get a 802.11a link working reliably then chances are the WIMAX would have similar issues (physics are hard to beat).
The other major advantage would come from the way WIMAX handles many client connections. On a typical 802.11a product you can reliably put 30-40 simulatenous connections, while WIMAX can handle ~150 per radio reliably.
Hope this helps, I am eager to see if any ‘generic’ WIMAX product comes out that could be powered by RouterOS.
Ok thanks a lot for your responses, i got the relief now
When I asked about performance there was no doubt that the WIMAX platform could outperform a standard 802.11a platform (31 Mbps vs. 14 Mbps @ 10 MHz channels)
I think it is related to that WiMAX is originally full duplex technology where we should use dual nStream to achieve full duplex in 11a. and the max type of modulation in both technologies are the same 64QAM as i know !
The other major advantage would come from the way WIMAX handles many client connections. On a typical 802.11a product you can reliably put 30-40 simulatenous connections, while WIMAX can handle ~150 per radio reliably.
This is mostly related to the access method which is changed in WiMAX to be fully-scheduled service via the access point vs CSMA/CA in 11a. CSMA means more waiting times which will reduce the throughput for each client and the overall online clients number.
You can’t get around the physics of radio waves, no matter what you choose to call it.
The higher the frequency, the more it’s blocked by obstructions.
My office runs on a 900Mhz link, SR9, through 1 Km of dense trees.
I couldn’t even detect a signal above background at 2.4Ghz.
Forget about 3.8 or 5Ghz.
