So the engineers need to get off their butts and get us software defined
radios capable of accessing large amounts of spectrum.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----- Original Message -----
From: "John Scrivner" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Wednesday, July 25, 2007 12:26 PM
Subject: Re: [WISPA] Public Safety
I wish that we could get all interests (including WISPs, Cellcos, Two-way,
Hams and Public Service) to think in terms of reservation of air time as
opposed to exclusivity of bandspace for future spectrum allocations. If an
emergency occurs then public safety should be able to force a reservation
of airtime in any band they need in my opinion. Then everyone can benefit
from having lower-cost, mass-produced equipment which is able to be used by
any interests in a given band.
I am not suggesting that we should not dedicate some bandspace for public
safety exclusively. They need some. What I am saying though is that many
other bands could have the ability to reserve airtime for specific
interests when needed. This would also allow for more efficient use of
spectrum.
There is no reason that we should not use any bands we can for
recreational, experimental and commercial use when there is not an
emergency situation. As long as the priority is in place to force the
airtime for public safety then we can hand it over instantly if needed. If
devices had to ask permission to transmit based on a base station priority
system then that system could be used for any purpose including 100%
public safety in a disaster. Allowing the priority of traffic to be
established instantly means that any interest could make use of the
bandwidth under certain conditions as established by a base station with
priority control over traffic in real time. We already have some spectrum
exclusively used for specific interests. I think all the rest should have
multiple use ability.
I may not be doing a good job of describing what I am suggesting but the
whole point is that airtime priority partitioning is more important than
band exclusivity. We need to start designing and building communications
systems with this approach in mind.
John Scrivner
Patrick Leary wrote:
Exactly, and I'm sure Blake wil also agree that 4.9 GHz is useful only
for fixed multipoint, PtP, or picocell tactical mesh (ala Packethop). I
should not say "only" because these are vital needs and enable large,
secure and relatively interference-immune pipes. But since public safety
workers spend most of their time in the field, the critical need is
mobile broadband access -- and the more dedicated in nature (as in
reserved for them) the better. And certainly there are not enough
dollars in the world to build a ubiquitous 4.9 GHz network; it simply is
not the band for such a thing and such an idea would be absurd.
- Patrick, Alvarion
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Blake Bowers
Sent: Wednesday, July 25, 2007 6:44 AM
To: WISPA General List
Subject: Re: [WISPA] Public Safety
4.9 is the only true data band.
800 is still shared - and Nextel is not
vacating it, just moving around a bit on it.
150, 450, and 800 will not support high
speed data with the present day band plan,
and changing that band plan would be a
unworkable at this day and time.
What do you mean about the third band that the
nationwide interoperable network could be in?
----- Original Message -----
From: "Mike Hammett" <[EMAIL PROTECTED]>
To: "WISPA List" <wireless@wispa.org>
Sent: Tuesday, July 24, 2007 6:23 PM
Subject: [WISPA] Public Safety
What all bands does the public safety "industry" use?
150 MHz
450 MHz
800 MHz
4.9 GHz
4.9 is exclusively public safety.
Nextel was granted some 1.9 GHz so that they would vacate 800 MHz,
leaving it to public safety.
The others are general commercial bands.
Now the FCC wants to give them 700 MHz. I'm all about giving them what
they need, but how much do they need? This would be the third band they
could do their nationwide inter-operable network in.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
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