From FCC Pioneer Preference May 3 1992
Telmarc Telecommunications
KEY TECHNOLOGICAL ELEMENTS
5. The
following technological approaches will be deployed, integrated, tested, and
optimized to determine their effectiveness in providing the specified service
quality goals.
(1) Adaptive Network Management: Adaptive Network Management,
ANM, is a system that uses in-situ sensors to monitor the power and signal
quality throughout the network. The number of sensors will greatly exceed the number
of cell locations. This set of dynamic measurements will then be used in a
feedback schemes to adaptive change the characteristics of the cell transmit
power and other characteristics to maximize the service quality. Specifically,
the Petitioners have individually designed a proprietary network management system
that uses the in-situ sensors that monitor all key signal elements. These
elements are power, frequency, interference, noise, and other significant signal
parameters. The system then transmits these signals back to a central processor
which then generates an optimal signal to control the cell site transmission
characteristics, such as power, frequency and other factors. The overall
objective is to optimize the system performance from the users perspective.
(2) Gateway RF Digital Front Ends: A broadband, digital front
end will be used to act as a gateway to interface the air interfaces of CDMA,
TDMA and other access methods through the same cell and in the same frequency band.
This system will permit multiple air interfaces to be gatewayed into the same
network access point thus reducing the need for a single standard, and
increasing the ability to provide a national network. This front end has been
developed by Steinbrecher Assoc, of Woburn, MA.
The system element allows, through its use of large gain bandwidth product
front end and fully digital RF processing, the ability to handles many different
and simultaneous multiple access methods, such as TDMA and CDMA. This ability
goes to the heart of interoperability and standards.
(3) CDMA Backbone Network: The Petitioner will use a CDMA
air interface and access methodology. The Petitioner fully supports the efforts
of QUALCOMM in their development and implementation of CDMA in the 800 MHz band
and their recent movement of this to the 1.85-1.90 GHz bands. Although there is
no uniqueness in the use of CDMA, the Petitioners argue that this technology
has specific characteristics that allow for the delivery a maximum benefit to
the public.
(4) Co-Located Distributed Switch Access: Unlike other proposed
schemes which use redundant MTSO accesses, this trial will focus on Central
Office Co-Location methods that reduce capital and operating cost redundancies.
The co-location approach, will minimize access line costs and eliminate the
need for a MTSO. The adjunct processors at the Central Offices will be interconnected
by a high speed bus to allow for adequate control and call hand-off.
Co-Location is achieved via the intelligence that is contained in the CDMA cell
sites and the adjunct processor distribute communications and processing
capabilities. The fundamental existence of this capability was demonstrated by
QUALCOMM in their CDMA trial, albeit not in the Co-Location context. The
QUALCOMM QTSO was in effect a no Co-Located adjunct. The Petitioners propose to
request access from the PUC in the Commonwealth of Massachusetts
to access New England Telephone on a Co-Locations basis. The public good achieved
is through the reduction in costs and the ability to use existing capital
assets provided by the LECs. The uniqueness of the Petitioners proposals are the
fact that extensive use of adjuncts will be made in the system operation.
(5) Adaptive Beam Forming Phased Array Technology: One of
the current problems with a cellular systems will be the use of broad beam
antennas and the inability to provide additional antenna gain on both transmit
and receive to the individual portables. With the use of adaptive beam forming
antennas, the service to lower power portables may be improved. The Petitioners
approach will include such capabilities. Time dynamic control of these multiple
bean antennas will permit higher localized gain on portables, which will in
turn allow for lower transmit power and thus longer portable battery life. The
Petitioners have been discussing the use of the technology developed at the Massachusetts
Institute of Technology's Lincoln Laboratory in this area.
All of the above are now becoming a reality in wireless. Timing is everything, so is living long enough!
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