[opendtv] Re: WiFi Supplanting Broadcasting? Get Real!
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 18 May 2004 16:03:04 -0400
Bob Miller wrote:
> "Broadcasting" as in OTA broadcasting is being supplanted by
> cable and
> satellite. There is no need other than regulatory for a
> broadcaster to
> deliver his signal via OTA. It is and could all be delivered
> via other
> microwave or fiber connections.
This always seems like a strange argument to me.
Surely, the same can be said about any other comm system. For
example, telephony can be delivered by means of cables and
satellites, instead of wireless cellular techniques. So what?
That doesn't mean that wireless cellular is wrong.
You can deliver OTA broadcast via other wired or wireless
techniques, but by doing so, you won't necessarily be gaining
in every aspect. The infrastructure costs would almost
certainly increase, reception will likely become more
difficult (depending on the scheme you select), and the
spectrum will almost certainly be used at lower spectral
efficiencies.
BUT, with a two-way infrastructure and possibly greater reuse
of spectrum (depending which alternative scheme you select),
the tradeoffs MIGHT be worth the trouble.
So you have to get beyond the simplistic sound bite to
determine whether any of these fuzzy ideas have any merit.
One thing for sure: using the IEEE 802.11 MAC to deliver
broadcast TV is not an efficient use of a "scarce resource."
EVEN IF you decide to use the 2.4 or 5 GHz spectrum and short
range of Wi-Fi for broadcast TV, you would certainly be better
off changing the protocol. You pay a steep price when you
implement a two-way wireless protocol.
> The rational for using this
> spectrum for
> such broadcasting is dwindling
That too is a strange assertion. If the reason is dwindling,
then it would be no less dwindling if the signal were
braodcast using other OTA means.
Bert
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