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VK2IO > WLAN 14.05.05 07:57l 61 Lines 2411 Bytes #999 (0) @ WW
BID : 62053_VK2IO
Read: GUEST DK5RAS OE7FTJ DO6NP DG9BFU
Subj: Re: Packet v WiFi
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ZS0DLD<ZS6FB<VK2AAB<VK2IO
Sent: 050509/1023Z @:VK2IO.#SYD.NSW.AUS.OC #:62053 [Castle Hill] FBB7.00i
From: VK2IO@VK2IO.#SYD.NSW.AUS.OC
To : WLAN@WW
Hi All.
VK2AAB wrote:
> In Sydney we have two what are really WiMax systems available for
>public use. Their protocol is not strickly WiMax at present but they are
>hardware compatible and the WiMax protocol will be downloaded to the users
>when the software is available.
Not true.
The two systems are not related to WiMAX at all - the hardware is incompatible
so there is no upgrade path.
>One of these systems has 84 base stations in Sydney.
This system operates on the 3.5 GHz band and they plan to roll out a second
system for WiMAX once that becomes standardised. They have bought enough
spectrum to run both systems in parallel. Over time, the WiMAX will take over
and then they can shut down the current proprietary system.
The other carrier is using spectrum at 1.9 GHz so they are not as well placed
for WiMAX which favours usage of 3.5 GHz.
>If an amateur club or group of clubs could purchase one of these base stations
>which I understand run about 25 watts on 3Ghz and either specify it for an
>amateur band or transvert it to an amateur band we would have a better wide
>coverage system than WiFi.
>
>I presume the design would be frequency agile because in different countries
>or even areas of different countries different bands would be needed.
>
>The user receivers are quite cheap from a number of suppliers in Sydney.
>My son is using one of these systems and finds it very fast. Faster in fact
>than ADSL.
The WiMAX gear is being readied now for a mass rollout. In a couple of years
it will be as cheap as 802.11b WiFi gear is now and with the advantage of much
wider geographical coverage.
>Under our regulations we could push up the base station power as much as we
>could afford. Likewise with the receivers modem a transvertor with higher
>power could improve the range considerably together with high gain antennae.
>I believe there is room on 1200 Mhz for one of these systems
>which could support most amateurs in a city.
It would not be cost effective to switch the equipment to 23cm and the extra
range would not be worth it. There would be many difficulties in adapting the
equipment - it would be beyond most amateurs who are looking for a buy and
plug in solution.
>Worthwhile the experts looking at this ?
A 9cm system - definitely!
>73 Barry VK2AAB
Cheers ... Gerard
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