United States of America

**DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE**

######## Proposal for Resolution 226

# **Agenda Item 1.31**: to consider the additional allocations to the mobile-satellite service in the 1-3 GHz band, in accordance with Resolutions **226 (WRC-2000)** and **227 (WRC-2000)**;

**Background Information**: WRC-2000 considered proposals for an
allocation to the mobile-satellite service (MSS) (space-to-Earth) in
Regions 1 and 3 in the frequency band 1 518-1 525 MHz. This band is
adjacent to the 1 525-1 559 MHz band in use by geostationary orbit (GSO)
MSS operators.

WRC-2000 considered in Resolution **226** that the proposed allocation
to the MSS (space-to-Earth) at 1 518-1 525 MHz due to potentially
widespread emissions upon the Earth from either GSO or non-GSO systems,
could have an impact on the mobile service, including aeronautical
mobile and aeronautical mobile telemetry, in all three Regions.
Resolution **226** also states there is a need to review the
power-flux-density (pfd) values in Appendix **5** in order to ensure
that they are adequate to protect new point-to-multipoint systems
operating in the fixed service in the band, as well as, a need to study
sharing between the MSS and aeronautical mobile telemetry in all the
Regions in the band. Sharing studies have been performed, and a number
of these studies lead to the conclusion that sharing between MSS and
flight aeronautical mobile telemetry is not possible.

Recommendation ITU-R M.1459 gives the values needed for protection of
the aeronautical mobile service for telemetry systems in the
1 452-1 525 MHz band from GSO satellites operating in the MSS. The
validity of M.1459 has been affirmed in several sharing studies
presented to and debated within ITU-R Working Parties 8B and 8D. The
required separation distances between co-frequency telemetry and MSS
operations prescribed by the levels in M.1459 are large, making the
feasibility of use of the 1 518-1 525 MHz band by MSS questionable. This
is true for co-frequency, co-coverage sharing and for co-frequency,
non-co-coverage sharing, even when the mitigation techniques suggested
in Recommendation M.1459 are considered.

There has been no MSS implemented in the 1 492-1 525 MHz band due to the
incompatibility between aeronautical telemetry and MSS systems.

**Proposals**:

**USA/ /1**

###### MOD

# 

1 452-1 525 MHz

+---------------------+-------------------------+---+---------------------+
| **Allocation to     |                         |   |                     |
| Services**          |                         |   |                     |
+---------------------+-------------------------+---+---------------------+
| **Region 1**        | **Region 2**            | * |                     |
|                     |                         | * |                     |
|                     |                         | R |                     |
|                     |                         | e |                     |
|                     |                         | g |                     |
|                     |                         | i |                     |
|                     |                         | o |                     |
|                     |                         | n |                     |
|                     |                         | 3 |                     |
|                     |                         | * |                     |
|                     |                         | * |                     |
+---------------------+-------------------------+---+---------------------+
| **1 452 - 1492**    | **1 452 - 1 492**       |   |                     |
|                     |                         |   |                     |
| FIXED               | FIXED                   |   |                     |
|                     |                         |   |                     |
| MOBILE except       | MOBILE 5.343            |   |                     |
| aeronautical        |                         |   |                     |
|                     | BROADCASTING 5.345      |   |                     |
| mobile              | 5.347                   |   |                     |
|                     |                         |   |                     |
| BROADCASTING 5.345  | BROADCASTING SATELLITE  |   |                     |
| 5.347               | 5.345 5.347             |   |                     |
|                     |                         |   |                     |
| BROADCASTING-       | 5.341 **MOD**           |   |                     |
|                     | [5.344]{.underline}     |   |                     |
| SATELLITE 5.345     |                         |   |                     |
| 5.347               |                         |   |                     |
|                     |                         |   |                     |
| 5.341 5.342         |                         |   |                     |
+---------------------+-------------------------+---+---------------------+
| **1 492 - 1 525**   | **1 492 - 1 525**       |   | **1 492 - 1 525**   |
|                     |                         |   |                     |
| FIXED               | FIXED                   |   | FIXED               |
|                     |                         |   |                     |
| MOBILE except       | MOBILE 5.343            |   | MOBILE              |
| aeronautical        |                         |   |                     |
|                     | ~~MOBILE-SATELLITE~~    |   | 5.341 ~~5.348A~~    |
| mobile              |                         |   |                     |
|                     | ~~(space-to-Earth)      |   |                     |
| 5.341 5.342         | 5.348A~~                |   |                     |
|                     |                         |   |                     |
|                     | 5.341 ~~5.344~~         |   |                     |
|                     | ~~5.348~~               |   |                     |
+---------------------+-------------------------+---+---------------------+

**Reasons**: There has been no MSS implemented in the 1 492-1 525 MHz
band due to the incompatibility between aeronautical telemetry and MSS
systems.

**USA/ /2**

**[NOC]{.underline}**

1 492-1 525 MHz

+---------------------+-------------------------+----------------------+
| **Allocation to     |                         |                      |
| Services**          |                         |                      |
+---------------------+-------------------------+----------------------+
| **Region 1**        | **Region 2**            | **Region 3**         |
+---------------------+-------------------------+----------------------+
| **1 492 - 1 525**   | **~~1 492 - 1 525~~**   | **1 492 - 1 525**    |
|                     |                         |                      |
| FIXED               | ~~FIXED~~               | FIXED                |
|                     |                         |                      |
| MOBILE except       | ~~MOBILE 5.343~~        | MOBILE               |
| aeronautical        |                         |                      |
|                     | ~~MOBILE-SATELLITE~~    | 5.341 ~~5.348A~~     |
| mobile              |                         |                      |
|                     | ~~(space-to-Earth)      |                      |
| 5.341 5.342         | 5.348A~~                |                      |
|                     |                         |                      |
|                     | ~~5.341 5.344 5.348~~   |                      |
+---------------------+-------------------------+----------------------+

**Reasons**: U.S. studies have shown that sharing between MSS and
aeronautical telemetry in 1 492 - 1 525 MHz, even when the service area
is in an adjacent ITU Region, is not feasible. Note; the U.S. proposes
that there be no change to the Allocations to Services in Regions 1 and
3 in the band 1 492 - 1 525 MHz. The proposed deletion of **No. 5.348A**
from Region 3 is a consequence of the proposed deletion of the
mobile-satellite service (space-to-Earth) allocation in Region 2 (see
proposal USA/ / 1 above) and is shown here for sake of consistency.

## USA/ /3

## MOD

**5.344** *Alternative Allocation*: in the United States, the band
1 452-[1]{.underline}~~ ~~[492]{.underline} ~~1 525~~ MHz is allocated
to the fixed and mobile services on a primary basis (see also No.
**5.343**).

**Reasons**: Consequential to the suppression of the mobile-satellite
service from the Table of Frequency Allocations in the band 1 492-1 525
MHz in Region 2.

**USA/ /4**

# **SUP**

**5.348**

**Reasons**: Consequential to the deletion of the mobile-satellite
service from the Table of Frequency Allocations at 1492 - 1525 MHz in
Region 2.

**USA/ /5**

# **SUP**

####### 

####### 5.348A

**Reasons**: Consequential to the deletion of the mobile-satellite
service from the Table of Frequency Allocations at 1492 - 1525 MHz in
Region 2.

**USA/ /6**

# **MOD**

### Appendix 5

**ANNEX 1**

**TABLE 5-2**

~~NOTE 4 -- Exceptions for the band 1 492-1 525 MHz are as follows:~~

~~4.1 For the land mobile service on the territory of Japan (No.
**5.348A**): -- 150 dB(W/m2) in 4 kHz at all angles of arrival is
applicable to all satellite space-to-Earth emissions.~~

> ~~4.2 For the aeronautical mobile service for telemetry (No.
> **5.343**), the requirement for coordination is determined by
> frequency overlap (No. **5.348**).~~

**Reasons**: Consequential changes due to the deletion of MSS from the
band 1 492- 1 525 MHz.

**USA/ /7**

**(MOD)**

> NOTE~~ 5 ~~[4]{.underline} -- In all cases involving sharing with
> analogue systems for telephony in the FS, further coordination is only
> required when the pfd values are greater than or equal to the
> coordination threshold values in both reference bandwidths.
>
> NOTE~~ 6~~ [5 ]{.underline}-- The pfd values specified for the band 2
> 160-2 200 MHz provide full protection for analogue radio-relay systems
> using the sharing criteria established by Recommendation ITU-R SF.357,
> for operation with a non GSO MSS system employing narrow-band time
> division multiple access/frequency division multiple access
> techniques.
>
> NOTE~~ 7~~ [6 ]{.underline}-- The pfd values specified for the band 2
> 483.5-2 500 MHz provide full protection for analogue radio-relay
> systems using the sharing criteria established by Recommendation ITU-R
> SF.357, for operation with multiple non GSO MSS systems employing code
> division multiple access techniques. The pfd values specified will not
> provide full protection for existing digital fixed systems in all
> cases. However, these pfd values are considered to provide adequate
> protection for digital fixed systems designed to operate in this band,
> where high-power industrial, scientific and medical equipment and
> possible low-power applications are expected to produce a relatively
> high interference environment.

**Reasons**: Proposing no change to these Notes, only consequential
numbering changes due to the deletion NOTE 4.