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To: Bernard Levy who wrote (5185)9/10/1999 11:08:00 PM
From: ftth  Read Replies (1) | Respond to of 12823
 
I've recently been looking into 911 emergency services for the newer phone technologies, and came across a Cahners-Instat report from 3/99 by Joyce L. Putscher. Here is a snip from that report relative to cellular/PCS that gives historical background info and who the solution providers are:

<begin snip>
How Will E-911 Affect Cellular/PCS Technology?

What is E-911 and Why Have It?

The Enhanced 911, or E-911, mandate by the Federal
Communications Commission (FCC) will be the vehicle for
providing GPS-enabled location-based services, and hence open up
opportunities for manufacturers of semiconductors and equipment
and software developers.

Most people don't think about it today. In an emergency, you call
911 and you think that even if you pass out or are prevented from
further talking to the 911 operator, that they can locate you.

In the
wireless world that is not the case. If you call 911 on your cellular
or PCS phone and cannot tell the operator where you are, you will
probably be out of luck. This situation gave birth to the wireless E-911 initiative.

To drive the point home on how important this issue is, the
National Emergency Number Association expects that within five
years the number of wireless 911 calls will represent over 50% of
the number of 911 calls, and within ten years that percentage will
grow to about 70 to 75%.

E-911 Phase I:

Generally speaking, Phase I of E-911 is the mandate of the FCC to
require all US wireless carriers connecting to the public switched
telephone network (PSTN) to provide basic 911 services that
include identifying the nearest cell site to the caller and the 10-digit wireless phone number of the caller.

This requirement was supposed to be in effect by April 1998. Under 5% of the Public
Safety Answering Points (PSAPs) can currently handle these
requirements.

Has anyone been penalized for non-compliance so far? Not to our
knowledge. The PSAPs don't seem to be asking carriers to become
compliant and carriers are combating the FCC over liability and
cost recovery issues.

So, we don't have a full Phase I in place nationwide, and we're
already on to Phase II. Since the carriers are already worried about
liability, Phase II is not likely to change that concern.

E-911 Phase II:

E-911 Phase II mandates that by October 1, 2001 an additional
requirement will be added. This requirement is being able to
locate the wireless 911 caller within 410 feet, or 125 meters -- 67%
of the time.

This includes all wireless 911 calls, not just the service
provider's own customers. So, this includes roamers in addition to
non-activated subscribers. (I already had someone tell me last year
that they advise anyone thinking about throwing away their old
analog phone to give it to a relative.

That way even though they
don't activate a service, they can still use it for an emergency
because of the requirement of connecting non-activated
subscribers' 911 calls.) Could this feature curtail a certain number
of new subscribers that only want a wireless phone for true
emergencies?

In order to comply with this more stringent location requirement,
different approaches to E-911 solutions may open up a Pandora's
Box in terms of compatibility issues from one service provider to
another.

This also means that approximately 67% of the provider's
subscribers need to be supported with E-911 Phase II service
(otherwise a 67% rate is basically not possible). The method of
implementing Phase II E-911 with network-based, hybrid
network/handset-based or handset-based solutions will directly
affect the timeline possible of compliance.

Hybrid- or handset-based
solutions will require getting new handsets out to at least
67% of its subscribers -- with the cost born by the customer or the
provider, or both.

If carriers have not been penalized thus far for Phase I non-compliance,
it doesn't seem likely that there will be an overriding
fear of penalties for Phase II non-compliance.

A number of carriers have applied to the FCC for waivers, or
extensions, to delay their compliance date to 2004 -- IF they can
provide better positioning accuracy than 125 meters. That will
require a hybrid or handset solution.

Thus, waviers have not set
well with network-based solution suppliers. In fact, it has set off
heated debates from these suppliers, such as TruePosition Inc., as it
is certainly not in their best interest if carriers decide to go with a hybrid- or handset-based solution.

How Will It Be Implemented?

Solutions for E-911 range from network based to purely handset
based. Network-based solutions include Angle of Arrival (AOA)
and Time Distance of Arrival (TDOA) methods.
The leading contenders for E-911 solutions that improve upon the
125 meter (410 feet) requirement are SnapTrack and SiRF.

SnapTrack can be considered as a hybrid network/handset-based
Solution. SiRF Technology Inc. has developed a full GPS chipset
solution that does not need the network to determine its position.

Although implementing a handset-based solution could be
considered as being more expensive than a network solution, we
assume that the operators will be able to retrieve the majority of
network-based solution expenses through the subscriber fees
imposed for wireless 911.

For a hybrid solution, the network-based
portion would be reimbursable, but what about the cost of
new phones? Would the operator's cost of all new phones be
reimbursable? Or, would only a portion be reimbursable -- that
representing the new material cost to the handsets?

<end snip>



To: Bernard Levy who wrote (5185)9/11/1999 11:00:00 AM
From: Curtis E. Bemis  Read Replies (1) | Respond to of 12823
 
There are two good semi-tech overview articles of interest
to "Last-Milers"

The latest issue, September, 1999, of IEEE's Spectrum, sent
to all IEEE members, has an article on DSL, "A Second Wind
for Wiring", and an article on fixed wireless, "Fixed
Wireless Routes for Network Access". I can't post them but
you could ask a friendly engineer or visit your library.

Both are very good.