Mr. John Giusti

Acting Chief of the International Bureau

Federal Communications Commission

445 12^th^ Street SW

Washington, D.C. 20554

Dear Mr. Giusti:

The National Telecommunications and Information Administration (NTIA),
on behalf of the Executive Branch agencies, has 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 document contains a draft proposal for Agenda Item 1.4.
Please note that the proposal only addresses the problem of
identification of a number of Federal Government exclusive or shared
frequency bands that currently are being considered by ITU-R Working
Party 8F as candidate bands. The proposal does not comment on the merits
of identifying additional spectrum for IMT, nor on the results or status
of the work that the ITU was to undertake under Resolution **228**.

This proposal 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,
>
> *(Origianl Signed September 13, 2006)*
>
> Fredrick R. Wentland
>
> Associate Administrator
>
> Office of Spectrum Management

Enclosure

# United States of America

## DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE

**Agenda Item 1.4**: to consider frequency-related matters for the
future development of IMT 2000 and systems beyond IMT 2000 taking into
account the results of ITU-R studies in accordance with Resolution **228
(Rev.WRC 03)**;

**Background Information**: Resolution **228 (WRC-03)** calls for
studies on frequency-related matters for the future development of
IMT-2000 and systems beyond IMT-2000 (IMT-Advanced) as defined by ITU-R.
Resolves 2 under Resolution **228 (WRC-03)** invites the ITU R to
report, in time for WRC 07, on the results of studies on the spectrum
requirements and potential frequency ranges suitable for the future
development of IMT-2000 and systems beyond IMT 2000, taking into
account:

-   the evolving user needs, including the growth in demand for IMT 2000
    services;

-   the evolution of IMT-2000 and pre-IMT-2000 systems through advances
    in technology;

-   the bands currently identified for IMT-2000;

-   the time-frame in which spectrum would be needed;

-   the period for migration from existing to future systems;

-   the extensive use of frequencies below those identified for IMT-2000
    in No. **5.317A**.

WARC-92 identified the bands 1 885-2 025 MHz / 2 110-2 200 MHz and
WRC-2000 identified the bands 806-960 MHz (ITU-R Region 1: 862-960 MHz)
/ 1 710-1 885 MHz / 2 500-2 690 MHz for use on a worldwide basis by
administrations wishing to implement IMT-2000 systems. Resolutions **212
(WARC 92)**, **223 (WRC-2000)** and **224 (WRC-2000)** invite
administrations to make available the necessary portion of these
identified bands for IMT-2000 development, while recognizing that
administrations have the flexibility to use the bands for other
applications of services to which the bands are allocated and to
implement IMT-2000 in other mobile bands.

In order to identify additional spectrum to meet IMT-Advanced
requirement, compatibility with existing services in the bands of
interest must be demonstrated through ITU-R technical studies. However,
at this time such studies have not been completed.

The prioritized candidate bands for IMT-2000 and IMT-Advanced systems
are between 400 MHz and 5 GHz (ITU-R Report \[IMT.CANDI\]) and are:

1.  410-430 MHz

2.  450-470 MHz

3.  470-862 MHz (portions already identified for Region 2 and some
    administrations by Resolution **224**)

4.  2 300-2 400 MHz (already identified for some administrations (U.S.)
    by Resolution **223**)

5.  2 700-2 900 MHz

6.  3 400-3 650 MHz

7.  3 650-4 200 MHz

8.  4 400-4 940 MHz

9.  4 940-5 000 MHz

Four of the bands identified as candidates, 410-430 MHz, 2 700-2 900
MHz, 3 400-3 650 MHz, and 4 400-4 940 MHz are considered in this
proposal. The remaining bands are 450-470 MHz, 470-698 MHz, 2 300-2 400
MHz, 3 650-4 200 and 4 940-5 000 MHz.[^1]

The band 410-430 MHz is used extensively by many administrations for
fixed and mobile communications systems, long-range surveillance
systems, as well as personnel location systems. Ground, shipborne, and
airborne radars, which are used for national security, utilize this
particular frequency band. Parts of the band are also used for extra
vehicular activity (EVA) communications by both the Shuttle and
International Space Station on a primary basis for the space research
service; and for transmitting hydrological and meteorological data.

In all three ITU-R Regions, the 2 700-2 900 MHz band is allocated to
aeronautical radionavigation. The radionavigation service is designated
as a safety service under RR No. **4.10** and harmful interference to it
cannot be accepted. By footnote No. **5.423**, ground-based
meteorological radars are authorized to operate on an equal primary
basis. Previous detailed analysis and sharing studies undertaken by
various ITU administrations and ongoing within the working parties have
shown that the utilization of the 2 700-2 900 MHz band by IMT systems is
not feasible.

The 3 400-3 650 MHz band is allocated to the radiolocation service on a
primary basis in ITU-R Regions 2 and 3. The band 3 400-3 600 MHz is
allocated to the radiolocation service on a secondary basis in ITU-R
Region 1 and the band 3 600-3 700 MHz band is allocated to the
radiolocation service on a secondary basis in ITU-R Regions 2 and 3. In
this frequency range, administrations have developed and deployed a
variety of mobile and transportable high power radar systems that
operate on land, on ships, and on aircraft. The shipborne radars are
principally used in coastal areas, but can be used during open ocean
transit also. The airborne radars are highly mobile and operate in many
areas of the world. A number of ongoing sharing studies submitted to the
ITU-R have indicated that sharing in the 3 400-3 700 MHz band between
the radiolocation service and IMT-Advanced systems operating in the
mobile service is not feasible due to significant levels of interference
into both the radar systems and IMT-Advanced devices.

The 4 400-4 940 MHz band is allocated on a primary basis to the fixed
service. The 4 400-4 800 MHz band is allocated on a primary basis to the
mobile service. The 4 500-4 800 MHz band is allocated on a primary basis
to the fixed satellite service, subject to Appendix **30B**. The
4 800-5 000 MHz band is allocated on a primary basis to the mobile
service, expect aeronautical mobile. The 4 990-5 000 MHz band is
allocated on a primary basis to the radio astronomy service. ITU-R
Working Party 8B successfully concluded studies under agenda item 1.5
that show aeronautical telemetry systems for flight test can share with
fixed and mobile systems in this band. Use of this band includes many
datalinks and a number of unmanned air systems networks. Troposcatter
radio terminals are deployed in this band to provide secure digital
long-haul radio trunking. Systems in this band include deployable
communications systems as well as fixed and mobile radio relay networks.

The band 4 400--5 000 MHz is designated by several administrations in
Europe and North America as a harmonised band to be used for defense
communications and thus is critical to these administrations' ability to
fulfill their peacekeeping obligations.

**Proposal**

**ARTICLE 5**

**USA/ / 1 [NOC]{.underline}**

410-460 MHz

**Reasons**: ITU-R studies have not shown compatibility between IMT
systems and the incumbent services in the 410-430 MHz band. Extensive
use of this band for national security and public safety purposes
preclude the use of this band for commercial wireless purposes.

**ARTICLE 5**

**USA/ / 2 [NOC]{.underline}**

2 700-4 800 MHz

+-----------------------+-----------------------+-----------------------+
| > Allocation to       |                       |                       |
| > services            |                       |                       |
+-----------------------+-----------------------+-----------------------+
| > Region 1            | > Region 2            | > Region 3            |
+-----------------------+-----------------------+-----------------------+
| **2 700-2 900**       |                       |                       |
| AERONAUTICAL          |                       |                       |
| RADIONAVIGATION 5.337 |                       |                       |
|                       |                       |                       |
| Radiolocation         |                       |                       |
|                       |                       |                       |
| 5.423 5.424           |                       |                       |
+-----------------------+-----------------------+-----------------------+
| **.......**           |                       |                       |
+-----------------------+-----------------------+-----------------------+

**Reasons**: ITU-R detailed analysis and sharing studies undertaken by
various ITU administrations and working parties have shown that the
utilization of the 2 700 - 2 900 MHz band by IMT-2000 and IMT-Advanced
systems is not feasible.

**ARTICLE 5**

**USA/ / 3 [NOC]{.underline}**

2 700-4 800 MHz

+----------------------+----------------------+-----------------------+
| > Allocation to      |                      |                       |
| > services           |                      |                       |
+----------------------+----------------------+-----------------------+
| > Region 1           | > Region 2           | > Region 3            |
+----------------------+----------------------+-----------------------+
| > **.....**          |                      |                       |
+----------------------+----------------------+-----------------------+
| > **3 400-3 600**    | > **3 400-3 500**    |                       |
| >                    | >                    |                       |
| > FIXED              | > FIXED              |                       |
| >                    | >                    |                       |
| > FIXED-SATELLITE\   | > FIXED-SATELLITE    |                       |
| > (space-to-Earth)   | > (space-to-Earth)   |                       |
| >                    | >                    |                       |
| > Mobile             | > Amateur            |                       |
| >                    | >                    |                       |
| > Radiolocation      | > Mobile             |                       |
| >                    | >                    |                       |
| > 5.431              | > Radiolocation      |                       |
| >                    | > 5.433              |                       |
| > **3 600-4 200**    | >                    |                       |
| >                    | > 5.282 5.432        |                       |
| > FIXED              | >                    |                       |
| >                    | > **3 500-3 700**    |                       |
| > FIXED-SATELLITE\   | >                    |                       |
| > (space-to-Earth)   | > FIXED              |                       |
| >                    | >                    |                       |
| > Mobile             | > FIXED-SATELLITE    |                       |
|                      | > (space-to-Earth)   |                       |
|                      | >                    |                       |
|                      | > MOBILE except      |                       |
|                      | > aeronautical       |                       |
|                      | > mobile             |                       |
|                      | >                    |                       |
|                      | > Radiolocation      |                       |
|                      | > 5.433              |                       |
|                      | >                    |                       |
|                      | > 5.435              |                       |
|                      | >                    |                       |
|                      | > **3 700-4 200**    |                       |
|                      | >                    |                       |
|                      | > FIXED              |                       |
|                      | >                    |                       |
|                      | > FIXED-SATELLITE    |                       |
|                      | > (space-to-Earth)   |                       |
|                      | >                    |                       |
|                      | > MOBILE except      |                       |
|                      | > aeronautical       |                       |
|                      | > mobile             |                       |
+----------------------+----------------------+-----------------------+
| > **....**           |                      |                       |
+----------------------+----------------------+-----------------------+

**Reasons**: ITU-R studies have not shown compatibility between IMT
systems and the radiolocation service, nor between IMT systems and the
fixed or fixed satellite service in the 3 400-3 650 MHz band.

**ARTICLE 5**

**USA/ / 4 [NOC]{.underline}**

2 700- 4 800 MHz

+----------------------+----------------------+----------------------+
| > Allocation to      |                      |                      |
| > services           |                      |                      |
+----------------------+----------------------+----------------------+
| > Region 1           | > Region 2           | > Region 3           |
+----------------------+----------------------+----------------------+
| **...........**      |                      |                      |
+----------------------+----------------------+----------------------+
| **4 400-4 500**      |                      |                      |
| FIXED                |                      |                      |
|                      |                      |                      |
| MOBILE               |                      |                      |
+----------------------+----------------------+----------------------+
| **4 500-4 800**      |                      |                      |
| FIXED                |                      |                      |
|                      |                      |                      |
| FIXED-SATELLITE      |                      |                      |
| (space-to-Earth)     |                      |                      |
| 5.441                |                      |                      |
|                      |                      |                      |
| MOBILE               |                      |                      |
+----------------------+----------------------+----------------------+

4 800-5 570 MHz

**Reasons**: Studies have not shown the compatibility of IMT with the
radio relay and troposcatter networks operating within the fixed and
mobile services. This NOC proposal applies to Agenda Item 1.4 and the
identification of spectrum for IMT. The 4 500-4 940 MHz band is being
considered for aeronautical mobile telemetry for flight test
(air-to-ground) under Agenda Item 1.5.

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

[^1]: The United States has not identified any additional bands that
    might be suitable.