WiMax vs DVB-RCS

I'm researching the differences between WiMax and DVB-RCS for IP
connectivity. It seems that there is lots of information available
about WiMax available on the net and in print but the DVB-RCS side is
proving much harder.

Basically, I'm looking for fairly basic information concerning things
like bandwidth, hardware information (infrastructure and clients) and
most importantly which would be better for what kind of application.

It seems to me that both are suited to 'fixed' installations, since
both require calibration for a particular location (directional
antennae for WiMax and satellite for DVB-RCS). DVB would seem to
require a lower hardware investment, since DVB is designed to be a
high-percentage-coverage technology (for TV reception) so the
downstream channel should be easy to obtain. The upstream channel will
of course need upstream satellite access which means high latency and
high cost. Wimax would need good infrastructure between backbone and
clients, which could prove more costly. Running costs should be
substantially lower though and latency should also be less of an issue.

DVB-RCS would seem to be totally unsuitable for home use due to the
high cost and latency (goodbye online gaming!). WiMax itself is meant
to be an infrastructure standard, but I believe there is a mobile (or
mobility) standard 802.20 which caters for client connection to
high-speed wireless.

If anyone could offer any information, tips, links or anything else
they feel would be useful, please let me know either here or via
e-mail.

Many thanks

Dave

Uzytkownik "My Big Fat Geek Wedding" <(E-Mail Removed)> napisal w
wiadomosci news:(E-Mail Removed) oups.com...
> I'm researching the differences between WiMax and DVB-RCS for IP
> connectivity. It seems that there is lots of information available
> about WiMax available on the net and in print but the DVB-RCS side is
> proving much harder.
>
> Basically, I'm looking for fairly basic information concerning things
> like bandwidth, hardware information (infrastructure and clients) and
> most importantly which would be better for what kind of application.
>
> It seems to me that both are suited to 'fixed' installations, since
> both require calibration for a particular location (directional
> antennae for WiMax and satellite for DVB-RCS). DVB would seem to
> require a lower hardware investment, since DVB is designed to be a
> high-percentage-coverage technology (for TV reception) so the
> downstream channel should be easy to obtain. The upstream channel will
> of course need upstream satellite access which means high latency and
> high cost. Wimax would need good infrastructure between backbone and
> clients, which could prove more costly. Running costs should be
> substantially lower though and latency should also be less of an issue.
>
> DVB-RCS would seem to be totally unsuitable for home use due to the
> high cost and latency (goodbye online gaming!). WiMax itself is meant
> to be an infrastructure standard, but I believe there is a mobile (or
> mobility) standard 802.20 which caters for client connection to
> high-speed wireless.
>
> If anyone could offer any information, tips, links or anything else
> they feel would be useful, please let me know either here or via
> e-mail.


AFAIK WiMax is suitable for wireless and mobile network in cities. In theory
it should give you close mobility to the one we get used with cell phone,

I know about ISP using satellite access but there is a lot of work on
optimizing traffic and lowering impact of high latency, however it is
possible. They are able to use it for voice trraffic which sounds like
impossible to me. Data via DVB is expensive. Cost of megabajt is much higher
than any other solution.

For true mobility you can use wimax or mesh network with lots of standard
2,4 GHz AP and 5GHz backbone.

--
Jan Werbinski O0oo....._[:]) bul, bul, bul
Prywatna http://www.janwer.com/
Nasza siec http://www.fredry.net/

Jan Werbinski wrote:

> Uzytkownik "My Big Fat Geek Wedding" <(E-Mail Removed)> napisal w
> wiadomosci news:(E-Mail Removed) oups.com...

>> DVB-RCS would seem to be totally unsuitable for home use due to the
>> high cost and latency (goodbye online gaming!).

Not totally. I'm not sure about "RCS", but afaik DirecWay is DVB, and it's
functional. It's expensive enough to be only useful if you have no other
broadband choice, and the latency makes VOIP and gaming difficult, but not
impossible (though apparently DirecWay explicitly breaks Vonage). Even so,
I use it extensively.

> I know about ISP using satellite access but there is a lot of work on
> optimizing traffic and lowering impact of high latency, however it is
> possible. They are able to use it for voice trraffic which sounds like
> impossible to me. Data via DVB is expensive. Cost of megabajt is much
> higher than any other solution.

High, but not nearly as high as high-speed cellular access in Canada. I
could theoretically download at least 5GB monthly for CDN$90 from my
satellite provider. iirc, the best deal I could find for cellular was
going to let me download 1GB before getting into $10 per-MB surcharges.
--
derek