All,
Again, remember that patrick works for 1 company while I personally
have the freedom as a consumer to talk to EVERYONE making equipment.
yes a licensed version will look like an unlicensed, but will be just
limited in
output power.
What is the point however of using 802.16e over 802.16d if you
don't have the proper
spectrum? Cmon! 1048 ofdm? still gotta go outdoors @ 5.8ghz!
I just ran a link budget ( for fun and games ) - utilizing a high
powered, high capacity
base station solution @ 5.8 ghz for a NLOS cpe. This company uses
beamforming,
2 x 2 mimo, uplink subchannelization, and guess what the effective
range per cell
for an indoor, window mounted CPE?
.5KM @ 75% penetration @ bpsk 1/2. .25km for a self install @ 90%
penetration.
802.16e doesn't always mean mobile, but some companies are coming
out with solutions where there isnt backwards compatibility to
802.16d ( dont ask me why )
It all depends on who the MFR is, ( Axcellera is one, Solectek
another ) The point
is 802.16d is still DAMN sweet gear that can get you greater
scaleability ( try up to
1000 subscribers per sector, or 8000 subscribers per base ) Carrier
grade voice
services, video services, T-1 grade internet, etc.
-
Jeff
On Oct 8, 2007, at 10:08 AM, Patrick Leary wrote:
Another inaccurate post. Jeff assumes that a UL WiMAX 5.8 GHz system
will look like a licensed version. He also assumes 802.16e means
mobile
-- it does not, 802.16e systems can be mobile, fixed, nomadic or
combinations of these. The WiMAX Forum will eventually have an 802.16e
profile for 5 GHz, but the systems themselves will be designed for the
realities of UL in 5 GHz (so they will be designed for fixed). As
such,
they will not have lots of the expensive things needed in a mobile
WiMAX
network like ASN gateways, AAA servers, etc.
At this point, it is probably best to ignore Jeff's posts regarding
WiMAX. They are thus far simply wildly off the mark.
Patrick Leary
AVP, Market Development
Alvarion, Inc.
o: 650.314.2628
c: 760.580.0080
[EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:wireless-
[EMAIL PROTECTED] On
Behalf Of Jeffrey Thomas
Sent: Saturday, October 06, 2007 3:29 AM
To: WISPA General List
Subject: Re: [WISPA] RF propagation map: WiFi vs WiMax?
802.16e in 5.8ghz would be absolutely the biggest waste of money ever
as you wouldn't get a true mobile network but your network costs
would be around, yaknow, 300k for a market of 20k people for just
BASE station equipment.
The way to go if you are really worried about upward compatibility
( and you own licenses or want to lease spectrum ) is to build a MOFO
network using ATCA solutions, but still you are talking for just 4
sectors of Wimax with scaleablity to multiple bands and sectors, 50k
per base station to start. The key is going to market with a solution
that has both a SDR system but low cost initially.
-
jeff
On Oct 4, 2007, at 8:23 PM, Senthil wrote:
We did consider deploying Wi-Max 802.16e (802.16d totally out of
the question) in 5.8 GHz but checking on the technical aspects of
the standard Wi-Max still seems to be rather immature as most
aspects are similar to 802.11a/g. Then again this applies only to
the initial Wave-1 compliant Wi-Max devices but once wave-2
standardized equipment comes we should have smarter antenna systems
(MIMO,beamforming) with which we will definitely get a better
performance.
So for the time being I think in terms of performance, pricing and
technology it's better to stick to Wi-Fi!
Senthil
John Valenti wrote:
Just curious if anyone has seen a coverage map that compares WiFi
and WiMax?
I spent a little bit of time researching WiMax, but decided I
would be unlikely to have a license and to just go with what I
have that mostly works (unlicensed). But I would like to know what
WiMax means in a rural, tree filled environment.
As a novice WISP (about 18 months now), I can only hope for good
coverage with 2.4GHz to maybe a mile. A rare house might have LOS
farther than that, but generally there will be enough trees in the
way by a mile to block my signal. (this is using farm grain legs/
silos for the AP, so maybe 150' max AGL) If I switch to 900MHz,
maybe the distance gets out to 2.5 miles.
Would a 2.5GHz Wimax AP push the signal much better thru trees? I
suppose it would make a difference what was at the customer end -
a laptop with a WiMax card vs a fixed, outdoor radio. And does AP
height help a lot? I don't see an advantage to paying commercial
tower rates to get above 200' in my situation, but maybe that
changes with WiMax.
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