Mr. John Giusti

Acting Chief of the International Bureau

Federal Communications Commission

445 12th Street SW

Washington, D.C. 20554

Dear Mr. Giusti:

The National Telecommunications and Information Administration (NTIA),
on behalf of the Executive Branch Agencies, have approved the release of
an additional draft Executive Branch proposal for WRC-07. This proposal
considers the federal agency inputs toward the development of U.S.
Proposals for WRC-07.

The enclosed draft proposal addresses agenda item 1.5 and is forwarded
for your consideration and review by your WRC-07 Advisory Committee. Jim
Vorhies of my staff is the primary contact for NTIA.

> Sincerely,
>
> *(Original Signed 12 June 12, 2006)*
>
> Fredrick R. Wentland
>
> Associate Administrator
>
> Office of Spectrum Management

Enclosure

# United States of America

## DRAFT PROPOSALS FOR THE WORK OF THE CONFERENCE^-^

**Agenda item 1.5:** to consider spectrum requirements and possible
additional spectrum allocations for aeronautical telecommand and high
bit-rate aeronautical telemetry, in accordance with Resolution **230
(WRC-03);**

**Background Information:** This agenda item addresses a growing demand
for spectrum that is allocated for aeronautical telemetry and associated
telecommand. There is a large and growing shortfall in spectrum that is
necessary to conduct aeronautical telemetry. The shortfall is
exacerbated by the loss of telemetry spectrum diverted to other than
telemetry applications. As indicated in the responses to ITU-R
Question 231/8, additional spectrum is necessary due to rapidly
increasing data rates associated with the testing of new and emerging
technologies. For example, newer technologies rely increasingly on
high-resolution video for monitoring aircraft functions or increased use
of computer based aircraft systems. Without access to additional
spectrum, aeronautical development would be subject to escalating delays
and costs, and the growth of aerospace industry would be impaired
(including equipment manufacturers, civilian programs and test ranges,
and airlines). New worldwide telemetry spectrum will aid numerous
countries and the international aeronautical community as
administrations continue to support their national airlines and some
administrations initiate their own test programs. Existing international
allocations used for aeronautical telemetry will need to remain
available.

Aeronautical mobile telemetry ("AMT") is an application within the
mobile service. Depending on the extent to which new AMT spectrum
requirements can be fulfilled using primary mobile service allocations,
it is important that the suitability of additional spectrum for AMT be
studied. International recognition of bands suitable for AMT will not
only encourage international harmonization of test equipment, but also
provide assurance to Administrations that, based on technical studies
conducted in the ITU-R, implementation of telemetry systems can be
accomplished by those Administrations wishing to do so without
disrupting other services using the bands. This will also enable
manufacturers to offer prospective customers aircraft with common test
equipment packages, and thus help airlines achieve additional economies
in the aircraft life-cycle cost. Moreover, by establishing conditions
under which AMT use of a band would be suitable, incumbent users of the
spectrum can be assured that they will not experience unacceptable
interference, and manufacturers and test ranges will have a measure of
additional certainty for the substantial investment in range
infrastructure that will be incurred in equipping to use new bands
deemed suitable for AMT.

The need for additional spectrum has been studied by several
administrations who indicate that as much as an additional 650 MHz may
be required for aeronautical flight test telemetry. The requirement may
differ depending on national and regional needs. It is not necessary to
fulfill all AMT requirements in only one band. The new requirements for
aeronautical telemetry are only in the air-to-ground direction inasmuch
as telecommand functions (i.e., ground-to-air transmissions) can be
accommodated in legacy bands. In addition, this new AMT spectrum will
not be used for the protection of life and property. The latter AMT
applications will continue to be accommodated in legacy bands (see Nos.
**5.342**, **5.343**, and **5.394** in the Radio Regulations). Hence,
aeronautical mobile telemetry applications in new spectrum will not
require the level of protection associated with operations in legacy
telemetry bands.

ITU-R WP 8B conducted numerous studies of bands that could be used to
satisfy the requirements of aeronautical telemetry applications.
Available technologies, signal fading considerations, and the scope of
agenda item 1.5 dictate that the new wideband AMT spectrum requirements
be fulfilled in the 3 GHz to 7 GHz frequency range. Several bands were
studied for suitability to implement AMT given the other co-primary
services in the band. These are the 4 400-4 940, 5 925-6 700, and
5 091-5 150 MHz bands. It is expected that the implementation of
telemetry may require avoiding co-frequency operations with local
services in some of the bands. This will likely mean that the spectrum
requirement for AMT would be satisfied using portions of each of the
bands studied and deemed suitable for AMT implementation.

The studies have demonstrated that aeronautical mobile telemetry for
flight test purposes can be implemented in these bands without adversely
affecting the operation of existing systems and allocated services.
Across all three bands that were studied, unacceptable interference from
AMT to other mobile service applications and other allocated services
can be precluded through AMT radiated power density constraints,
application of existing earth station coordination provisions, and
bi-lateral coordination with other terrestrial services of other
Administrations when warranted under specific conditions identified.
Existing Radio Regulations adequately preclude unacceptable interference
to AMT systems. The studies also show that there would not be undue
constraints placed on future deployment of systems in the co-allocated
services, provided applications are limited to flight testing conducted
in specific geographic areas. In cases where AMT operations could impact
Radio Astronomy observatories, it may be possible to arrange AMT
time-sharing with those observatories to enable AMT use of the
4 825-4 835 MHz band.

In the past, terms such as "designated" or "identified" have been used
in the Radio Regulations with respect to certain technologies and bands
to encourage technology implementation on a worldwide basis without
making the use by administrations mandatory and without establishing any
priority of use. Since the spectrum requirements and the conditions
under which AMT will be implemented can vary by administration, an
approach is proposed to simply indicate the suitability of certain bands
for the implementation of AMT based on compatibility studies. This
approach provides valuable information while maximizing the flexibility
of implementing AMT. A finding that spectrum is suitable for AMT
implementation inherently would not establish any priority of use or
preclude use of the bands by other co-primary services.

Any authorization of AMT operations within these bands would be decided
by individual administrations, and would be specifically limited to
testing of aircraft at designated flight test areas in the air-to-ground
direction within those individual countries. According to No. **5.444**
of the Radio Regulations, the 5 091-5 150 MHz band is to be used by the
MLS (Microwave Landing System) with precedence given to this
international standard system. However, the band 5 091-5 150 MHz is not
yet in use by MLS.

The 5 091-5 150 MHz band is already allocated to the aeronautical
radionavigation service (ARNS) on a primary basis in all Regions and is
also allocated to the fixed-satellite service (FSS) (Earth-to-space) on
a primary basis. This FSS allocation is limited to feeder links of
non‑geostationary mobile-satellite systems in the mobile-satellite
service and is subject to coordination under No. **9.11A**. Test
aircraft are not intended to use ground-to-air transmissions in this
ARNS band. Administrations are also considering the band 5 091-5 150 MHz
under agenda item 1.6 for allocation to the aeronautical mobile (R)
service. Studies have shown that AMT can share with both the FSS and the
possible AM(R)S system in the band 5 091-5 150 MHz.

Use of the 4 400-4 940 MHz, 5 925-6 700 MHz, and 5 091-5 150 MHz bands
for aeronautical telemetry is subject to coordination with FSS earth
stations in accordance with Article **9** of the ITU Radio Regulations.

**Proposal**

USA/ /01 ADD

**5.**\[**441A\]** The bands 4 400-4 940 MHz and 5 925-6 700 MHz are
suitable for the implementation of aeronautical mobile telemetry
applications for flight testing limited to air-to-ground direction.
Resolution \[**AMT4-6GHz**\] shall apply.

**Reasons:** A footnote as above could be used to satisfy a portion of
the 650 MHz spectrum requirement. The advantage of such a footnote is
that it merely states that the bands are suitable and that, via the
provisions of Resolution \[**AMT4-6GHz**\], AMT for flight testing could
share spectrum without undue constraints on other co-primary services in
the band(s).

USA/ /02 ADD

**5.\[444C\]** The band 5 091-5 150 MHz is also allocated to the
aeronautical mobile service, limited to air-to-ground flight test
telemetry applications. Resolution \[**AMT5GHz**\] shall apply.

**Reasons:** This allocation is necessary for implementation of AMT in
the band 5 091-5 150 MHz. The footnote will ensure that the allocation
to AMS is limited to air-to-ground flight test telemetry only.
Resolution \[**AMT5GHz**\] specifies the sharing conditions in the band.

USA/ /03 MOD

**5.442** In the band~~s 4 825-4 835 MHz and~~ 4 950-4 990 MHz, the
allocation to the mobile service is restricted to the mobile, except
aeronautical mobile, service. [In the band 4 825-4 835 MHz, applications
in the aeronautical mobile service are limited to aeronautical mobile
telemetry for flight testing in the air-to-ground direction. Resolution
\[AMT4-6GHz\] shall apply.]{.underline}

**Reasons:** This modification to No. **5.442** exempts AMT from the
aeronautical mobile exclusion.

USA/ /04 MOD

2 700-4 800 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **....**             |                      |                       |
+----------------------+----------------------+-----------------------+
| **4 400-4 500**      |                      |                       |
| FIXED                |                      |                       |
|                      |                      |                       |
| MOBILE **ADD**       |                      |                       |
| 5.\[441A\]           |                      |                       |
+----------------------+----------------------+-----------------------+
| **4 500-4 800**      |                      |                       |
| FIXED                |                      |                       |
|                      |                      |                       |
| FIXED-SATELLITE      |                      |                       |
| (space-to-Earth)     |                      |                       |
| 5.441                |                      |                       |
|                      |                      |                       |
| MOBILE **ADD**       |                      |                       |
| 5.\[441A\]           |                      |                       |
+----------------------+----------------------+-----------------------+
| **....**             |                      |                       |
+----------------------+----------------------+-----------------------+

4 800-5 570 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **....**             |                      |                       |
+----------------------+----------------------+-----------------------+
| **4 800-4 990**      |                      |                       |
| FIXED                |                      |                       |
|                      |                      |                       |
| MOBILE **MOD** 5.442 |                      |                       |
| **ADD** 5.\[441A\]   |                      |                       |
|                      |                      |                       |
| Radio astronomy      |                      |                       |
|                      |                      |                       |
| 5.149 5.339 5.443    |                      |                       |
+----------------------+----------------------+-----------------------+
| **5 030-5 150**      |                      |                       |
| AERONAUTICAL         |                      |                       |
| RADIONAVIGATION      |                      |                       |
|                      |                      |                       |
| 5.367 5.444 5.444A   |                      |                       |
| **ADD** 5.\[444C\]   |                      |                       |
+----------------------+----------------------+-----------------------+
| ....                 |                      |                       |
+----------------------+----------------------+-----------------------+

5 570-7 250 MHz

+----------------------+----------------------+-----------------------+
| Allocation to        |                      |                       |
| services             |                      |                       |
+----------------------+----------------------+-----------------------+
| Region 1             | Region 2             | Region 3              |
+----------------------+----------------------+-----------------------+
| **....**             |                      |                       |
+----------------------+----------------------+-----------------------+
| **5 925-6 700**      |                      |                       |
| FIXED                |                      |                       |
|                      |                      |                       |
| FIXED-SATELLITE      |                      |                       |
| (Earth-to-space)     |                      |                       |
| 5.457A 5.457B        |                      |                       |
|                      |                      |                       |
| MOBILE **ADD**       |                      |                       |
| 5.\[441A\]           |                      |                       |
|                      |                      |                       |
| 5.149 5.440 5.458    |                      |                       |
+----------------------+----------------------+-----------------------+
| **....**             |                      |                       |
+----------------------+----------------------+-----------------------+

**Reasons:** The appropriate modifications to the table of allocations
have been made to reflect proposals 1 through 3.

USA/ /05 ADD

DRAFT RESOLUTION \[AMT4-6GHz\] (WRC-07)

Use of the bands 4 400-4 940 MHz and 5 925-6 700 MHz by an aeronautical
mobile telemetry application in the mobile service

The World Radiocommunication Conference (Geneva, 2007),

c*onsidering*

a)  that the bands 4 400-4 500 MHz and 4 800-4 940 MHz are allocated to
    the fixed and mobile services on a primary basis;

b)  that the band 4 500-4 800 MHz is allocated to the fixed,
    fixed-satellite (space-to-Earth), and mobile services on a
    co-primary basis;

c)  that the band 4 825-4 835 MHz is allocated to the radio astronomy
    service on a primary basis in Argentina, Australia and Canada (see
    **No 5.443**), and that the band 4 800-4 990 MHz is allocated to the
    radio astronomy on a secondary basis worldwide and that **No 5.149**
    applies;

d)  that **No**. **5.442 (MOD)** applies to aeronautical mobile
    telemetry for flight testing operations in the band 4 825-4 835 MHz;

e)  that the band 5 925-6 700 MHz is allocated to the fixed,
    fixed-satellite (Earth-to-space), and mobile services on a
    co-primary basis;

*f)* that studies have been conducted within the ITU-R concerning the
sharing and compatibility of aeronautical mobile telemetry for flight
testing with other services in the bands 4 400-4 940 and 5 925-6 700
MHz;

*g)* that the bands 4 400-4 940 MHz and 5 925-6 700 MHz have been deemed
suitable for the implementation of aeronautical mobile telemetry
applications for flight test purposes;

*h)* that spectrum efficiency is enhanced in situations where new
applications can be implemented compatibly in bands that are heavily
occupied,

> *recognizing*

a.  that the use of the bands 4 500-4 800 MHz (space-to-Earth) by the
    fixed-satellite service shall be in accordance with the provisions
    of Appendix **30B** **(see No 5.441)**;

b.  that ITU-R studies contain assumptions and criteria for ensuring the
    successful sharing and compatibility between aeronautical mobile
    telemetry in the mobile service, limited to flight testing, and
    other services operating in the bands 4 400-4 940 MHz and
    5 925-6 700 MHz;

c.  that provisions for the coordination of terrestrial and space
    services exist in the Radio Regulations,

> *noting*

*a)* that the criteria used and assumptions made in sharing studies
between aeronautical mobile telemetry flight test applications and other
services are only applicable to this specific case,

> *resolves*

1 that administrations take into account that the bands 4 400-4 940 MHz
and 5 925-6 700 MHz have been deemed suitable for the implementation of
aeronautical mobile telemetry applications for flight testing purposes,
based on the ITU studies referred to in *recognizing b)* above, and
shall designate flight test areas within its territory to minimize the
impact on other services;

2 that administrations implementing aeronautical mobile telemetry for
flight test purposes that might affect the assignments of other
administrations, shall utilize the criteria set forth below:

> \- the peak e.i.r.p. should not exceed -2 dBW/MHz;
>
> \- limit transmissions to designated flight test areas;
>
> \- if operation of AMT aircraft stations are planned within 500 km of
> the territory of an administration in which the band 4 825 - 4 835 MHz
> is allocated to Radio Astronomy on a primary basis (see No.
> **5.443**), consult with that administration to determine whether any
> special measures are needed to prevent interference to their Radio
> Astronomy observations;
>
> \- if operation of AMT aircraft stations are planned within 450 km of
> the territory of an administration operating receiving stations in the
> fixed or mobile services in the bands 4 400-4 940 MHz and 5 925-6 700
> MHz, and the antenna main beam axis of any FS/MS receiving station is
> pointed within 12 km of the AMT aircraft flight area when measured
> orthogonally from the main beam axis projection on the earth's surface
> to the boundary of the flight area projection on the earth's surface,
> undertake bi-lateral consultations with that administration to
> determine whether any special measures are needed to prevent
> interference to such receiving stations.

USA/ /06 ADD

DRAFT RESOLUTION \[AMT5GHz\]

Use of the band 5 091-5 150 MHz by the aeronautical mobile service for
the implementation of aeronautical mobile telemetry applications

The World Radiocommunication Conference (Geneva, 2007),

> *considering*

*a)* the allocation of the frequency band 5 030-5 150 MHz to the
aeronautical radionavigation service;

*b)* the allocation of the 5 091 - 5 150 MHz band to the fixed-satellite
(FSS) (Earth-to-space), which is limited to feeder links of
non-geostationary satellite (non-GSO) systems in the mobile-satellite
service (MSS) services;

c)  that the band 5 000-5 150 MHz is also allocated to the aeronautical
    mobile-satellite (R) service on a primary basis, subject to
    agreement obtained under No. **9.21**;

d)  that this conference has allocated the 5 091-5 150 MHz band to the
    aeronautical mobile service (AMS), limited to air-to-ground flight
    test telemetry applications,

> *recognizing*

*a)* that spectrum efficiency is enhanced in situations where new
applications can be implemented compatibly in heavily occupied bands;

*b)* that studies have been conducted within the ITU-R concerning the
sharing and compatibility of aeronautical mobile telemetry (AMT) for
flight testing with other services in the band 5 091-5 150 MHz;

*c)* that precedence is to be given to the microwave landing system
(MLS) in accordance with No. **5.444** in the frequency band 5 030-5 150
MHz,

> *noting*

*a)* that ITU-R studies describe methods for ensuring compatibility and
sharing between the AMS and FSS operating in the band 5 091-5 150 MHz;

*b)* that methods to facilitate sharing between MLS and AMS are
contained in ITU-R Recommendation \[MLS-AMS\],

> *resolves*

1 that administrations take account that the band 5 091-5 150 MHz has
been allocated to AMS, limited to implementation of aeronautical mobile
telemetry applications for flight test purposes, based on the ITU
studies referred to in *notings a) and b)* above;

2 that administrations choosing to implement aeronautical mobile
telemetry for flight test purposes which might affect the assignments of
other administrations in the band 5 091-5 150 MHz shall utilize the
criteria set forth below:

-   limit transmissions to designated flight test areas;

-   bi-laterally consult with administrations operating Microwave
    Landing Systems and whose territory is located with the distance
    \"D\" of the AMT flight area, where \"D\" is determined by the
    following equation:

D = 10^\[127.55\ -\ 20\ log(f)\ +\ E\]/20^

> where:
>
> D is the distance separation (km) triggering the consultations;
>
> f is the minimum frequency (MHz) used by the AMT system; and
>
> E is the peak equivalent isotropically radiated power density (dBW in
> 150 kHz) of the aircraft transmitter.

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_