------------------------------------------------ ----------------------------------------------------
  **World Radiocommunication Conference (WRC-07)\  ![](media/image1.png){width="1.9270833333333333in"
  Geneva, 22 October - 16 November 2007**          height="0.8125in"}

                                                   

                                                   

  **PLENARY MEETING**                              **Addendum 5 to Document 41-E**

                                                   **22 August 2007**

                                                   **Original: English**

  Asia-Pacific Telecommunity Administrations       

  common proposals for the work of the conference  

  Agenda item 1.5                                  
  ------------------------------------------------ ----------------------------------------------------

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)**

Introduction

This document provides APT Common Proposals on WRC-07 Agenda item 1.5.

Four distinct issues have been identified under this agenda item:

***Issue A:*** Consider the spectrum required to satisfy wideband
aeronautical mobile telemetry requirements and associated telecommand
above 3 GHz;

***Issue B:*** Review, with a view to upgrading to primary, the
secondary allocations to the mobile service in the frequency range
3-16 GHz for the implementation of wideband aeronautical telemetry and
associated telecommand;

***Issue C:*** Consider possible additional allocations to the mobile
service, including aeronautical mobile, on a primary basis in the
frequency range 3-16 GHz for the implementation of wideband aeronautical
telemetry and associated telecommand, taking into account *considering
d)*; and

***Issue D:*** Designate existing mobile allocations between 16 and
30 GHz for wideband aeronautical telemetry and associated telecommand.

APT Administrations support the outcomes of studies under Resolution 230
(WRC--03) into the requirements for justifiable wideband aeronautical
mobile telemetry (AMT) and associated telecommand spectrum above 3 GHz,
and note that *considering d)* of this Resolution identifies a need to
protect existing services.

# Issue A

Introduction

APT members do not support the addition of footnotes in RR Article 5
indicating that existing MS allocations at 4 400-4 940 MHz and
5 925-6 700 MHz can be used for AMT for flight testing if implemented in
accordance with regulatory provisions that would be incorporated in a
new WRC Resolution (CPM Report Method A (1/1.5/5.1.1)).

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**[NOC]{.underline}** ASP/41A5/41

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               |                      |                       |
+----------------------+----------------------+-----------------------+

**[NOC]{.underline}** ASP/41A5/41A

4 800-5 570 MHz

**Reasons:** The band 4 400-4 940 MHz is heavily used by other primary
services (FSS, FS, etc.) and additional AMS allocations to these bands
could constrain the development of these existing services.

**[NOC]{.underline}** ASP/41A5/42

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               |                      |                       |
|                      |                      |                       |
| 5.149 5.440 5.458    |                      |                       |
+----------------------+----------------------+-----------------------+

**Reasons:** The band 5 925-6 700 MHz is heavily used by other primary
services (FSS, FS, etc.) and an additional AMS allocation to this band
could constrain the development of these existing services.

# Issue B

Introduction

APT members support the conclusion included in the CPM Report
(1/1.5/5.2) that no change is required.

# Issue C (5 030-5 091 MHz)

Introduction

APT members do not support the addition in RR Article 5 of a new AMS
allocation limited to telemetry to support testing of aircraft in the
band 5 030-5 091 MHz in the Table of Frequency Allocations and additions
or modifications of associated footnotes (CPM Report Method C1
(1/1.5/5.3.1)).

# Issue C (5 091-5 150 MHz)

Introduction

APT members support the addition of footnotes in RR Article 5 of new MS,
limited to AMS allocation in the band 5 091-5 150 MHz limited to
aeronautical mobile telemetry for flight testing under the condition
that if an allocation to AM(R)S is made under Agenda item 1.6 in the
same band that the AM(R)S allocation shall take precedence over the use
of the band by aeronautical mobile telemetry (CPM Report Method C2b
(1/1.5/5.3.2.2)). A Resolution would specify the necessary sharing
constraints and other provisions for AMT access to the subject frequency
bands based on the AMT constraints that were identified in the frequency
sharing studies.

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**MOD** ASP/41A5/43

4 800-5 570 MHz

**Reasons:** The band 5 030-5 091 MHz is required to satisfy
requirements for MLS based on ICAO Standards and Recommended Practices
(SARPs).

**MOD** ASP/41A5/44

4 800-5 570 MHz

**Reasons:** The identification of new frequency bands for AMT for
flight testing will facilitate a worldwide harmonized approach for
administrations choosing to implement aeronautical telemetry for flight
testing in this band.

**ADD** ASP/41A5/45

**5.A15** The band 5 091-5 150 MHz is also allocated to the aeronautical
mobile (R) service on a primary basis, limited to surface applications
at airports by systems operating in accordance with recognized
international aeronautical standards. Such use shall be in accordance
with Resolution **\[ASP/AI1.5/1-AM(R)S-5 GHz\] (WRC‑07)**.

**Reasons:** Text of footnote for allocation to the aeronautical mobile
(R) service proposed under Agenda item 1.6 (CPM Report 1/1.6/6.4),
reproduced here for ease of reference.

**ADD** ASP/41A5/46

**5.B15** *Additional allocation:***  **the band 5 091-5 150 MHz is also
allocated to the aeronautical mobile service limited to aeronautical
telemetry applications. Such use shall not cause harmful interference to
nor claim protection from the aeronautical mobile (R) service. The
requirements of the aeronautical mobile (R) service shall take
precedence over the use of the band by the mobile, including
aeronautical mobile, service. Resolution **\[ASP/AI1.5/1-AM(R)S-5 GHz\]
(WRC‑07)** shall apply.

**Reasons:** ITU-R studies have demonstrated that telemetry systems can
be implemented compatibly with other services allocated in this band,
provided that the appropriate sharing conditions specified in the
proposed Resolution are implemented. The precedence of the aeronautical
mobile (R) service over the use of the band by the mobile service,
including aeronautical mobile, reflects the safety of life use of the
band by the aeronautical mobile (R) service.

**ADD** ASP/41A5/47

RESOLUTION \[ASP/AI1.5/1-AM(R)S**-**5 GHz\] (WRC-07)

Compatibility between the aeronautical mobile (R) service and
fixed-satellite service (Earth-to-space) in the band 5 091-5 150 MHz

The World Radiocommunication Conference (Geneva, 2007),

considering

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

*b)* the current allocation of the frequency band 5 000-5 150 MHz to the
aeronautical mobile satellite (R) service (AMS(R)S) subject to agreement
obtained under No. **9.21** and the aeronautical radionavigation service
(ARNS);

*c)* that this Conference has allocated the 5 091-5 150 MHz band for the
aeronautical mobile (R) service (AM(R)S) limited to systems operating in
accordance with recognized international aeronautical standards;

*d)* that this Conference has allocated the 5 091-5 150 MHz band to the
aeronautical mobile service (AMS) limited to secure and confidential
radiocommunications between aircraft and ground intended for systems
used in response to unlawful interruption of aircraft operations;

*e)* that the International Civil Aviation Organization (ICAO) is in the
process of identifying the technical and operating characteristics of
new systems operating in the AM(R)S in the band 5 091-5 150 MHz;

*f)* that one AM(R)S system, to be used by aircraft operating on the
airport surface, has demonstrated compatibility with the FSS in the
5 091-5 150 MHz band;

*g)* that ITU‑R studies have examined potential sharing among AMS
applications and have shown that the aggregate interference from
aeronautical security, aeronautical telemetry and AM(R)S should total no
more than 3% Δ*T~s~*/*T~s~*,

recognizing

*a)* 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;

*b)* that ICAO publishes recognized international aeronautical standards
for AM(R)S systems,

noting

*a)* that the number of FSS transmitting stations required may be
limited;

*b)* that the use of the band 5 091-5 150 MHz by the AM(R)S needs to
ensure protection of the current or planned use of this band by the FSS
(Earth-to-space);

*c)* that ITU‑R studies describe methods for ensuring compatibility
between the AM(R)S and FSS operating in the band 5 091-5 150 MHz, and
compatibility has been demonstrated for the AM(R)S system referenced in
*considering f)*,

resolves

1 that administrations, in making assignments, shall ensure that
stations in the AM(R)S operate in accordance with ICAO Standards and
Recommended Practices (SARPs);

2 that the coordination distance with respect to stations in the FSS
operating in the band 5 091-5 150 MHz shall be based on ensuring that
the received signal at the AM(R)S station from the FSS transmission does
not exceed −143 dB(W/MHz), where the required basic transmission loss
shall be determined using the methods described in Recommendations
ITU‑R P.525‑2 and ITU‑R P.526‑9;

3 that studies of the band 5 091-5 150 MHz be undertaken by
ITU‑R regarding the apportioning of the FSS 3% Δ*T~s~*/*T~s~* aggregate
interference limit between new AMS allocated at this Conference, with
the task of developing or revising Recommendation ITU‑R M.\[AM(R)S/AS
5 091-5 150 MHz\] to ensure that aggregate limit is not exceeded;

4 that until the studies in *resolves* 3 are completed, a provisional
limit for the AM(R)S of less than *xx*%[^1] Δ*T~s~*/*T~s~* shall be
applied. This value will be reviewed at a future conference preferably
WRC‑11,

invites

1 administrations and ICAO to supply technical and operational criteria
necessary for sharing studies for the aeronautical mobile (R) service,
and to participate actively in such studies;

2 ICAO to take into account the limit given in *resolves* 4 when
developing SARPS for AM(R)S systems operating in the band
5 091-5 150 MHz,

instructs the Secretary-General

to bring this Resolution to the attention of ICAO.

**Reasons:** Text of the Resolution regarding compatibility of the
aeronautical mobile (R) service with the fixed-satellite service
proposed under Agenda item 1.6 (CPM Report 1/1.16.6.4), reproduced here
for ease of reference.

**ADD** ASP/41A5/48

RESOLUTION \[ASP/AI1.5/2-AMT5GHz\] (WRC-07)

Sharing and other provisions for aircraft stations of aeronautical\
mobile service limited to transmissions of telemetry for\
flight testing in the band 5 091-5 150 MHz

The World Radiocommunication Conference (Geneva, 2007),

considering

*a)* that various technically and operationally different aeronautical
mobile service (AMS) applications limited to transmissions of telemetry
systems for flight testing networks have been designed to commence
operation in the near future;

*b)* that aircraft stations will operate on a national and international
basis;

*c)* that the operation of aircraft stations is usually subject to
national and international rules and regulations including satisfactory
conformance to a mutually agreed technical standard and operational
requirements;

*d)* that there is a need for identifying the technical and operational
requirements for the conformance testing of aircraft stations;

*e)* that the technical and operational requirements need to achieve an
acceptable balance between radio equipment complexity and the need for
effective use of the radio-frequency spectrum,

noting

*a)* that results of studies conducted in accordance with
Resolution **230 (Rev.WRC‑03)** show the feasibility of using the band 5
091-5 150 MHz for AMS limited to transmissions of telemetry for flight
testing on a primary basis under certain conditions and arrangements;

*b)* that the identification by ITU‑R of technical and operational
requirements for aircraft stations operating in the band 5 091-5 150 MHz
should prevent unacceptable interference to other services;

*c)* that the band 5 091-5 150 MHz is allocated to the aeronautical
radionavigation service on a primary basis;

*d)* that the band 5 091-5 150 MHz is to be used for the operation of
the international standard microwave landing systems (MLS) for precision
approach and landing; the requirements for this system shall take
precedence over other uses of this band in accordance with No. **5.444**
of the Radio Regulations;

*e)* that the MLS can be protected through the implementation of an
adequate separation distance between a radiating aeronautical mobile
service (AMS) transmitter to support telemetry and MLS receivers,

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

recognizing

*a)* that precedence is to be given to the MLS in accordance with
No. **5.444** in the frequency band 5 030-5 150 MHz;

*b)* that the frequency band 5 091-5 150 MHz is also allocated to the
aeronautical mobile (R) service on a primary basis, limited to surface
applications at airports by systems operating in accordance with
recognized international aeronautical standards. Such use shall be in
accordance with Resolution **\[ASP/AI15/1-AM(R)S-5 GHz\] (WRC‑07)** (RR
No. **5.A15**);

*c)* that the requirements of the aeronautical mobile (R) service shall
take precedence over the use of the band by the mobile, including
aeronautical mobile, service (RR No. **5.B15**),

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 (AMT) applications for flight test purposes, based on ITU
studies;

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

-- limit transmissions to those from aircraft stations only, see RR
No. **1.83**;

-- transmissions limited to designated flight test areas, where flight
test areas are airspace designated by administrations for flight test
within their territories;

-- limit the aggregate of any interference from all AMS including AMT
aircraft stations transmissions to the fixed-satellite service
spacecraft receivers to no more than 3% delta
*T~satellite~*/*T~satellite~*;

-- bilaterally coordinate with administrations operating microwave
landing systems and whose territory is located within the distance *D*
of the AMT flight area, where *D* is determined by the following
equation:

*D* = 43 + 10^(127.55\ −\ 20\ log(*f*)\ +\ *E*)/20^

where:

*D*: distance separation (km) triggering the coordination

*f*: minimum frequency (MHz) used by the AMT system

*E*: peak equivalent isotropically radiated power density (dBW in
150 kHz) of the aircraft transmitter.

**Reasons:** ITU-R studies have demonstrated that telemetry systems can
be implemented compatibly with other services allocated in this band,
provided that the appropriate sharing conditions specified in the
proposed Resolution are implemented.

# Issue C (5 150-5 250 MHz)

Introduction

APT members do not support the addition in RR Article 5 of new AMS
allocations limited to telemetry to support testing of aircraft in the
band 5 150-5 250 MHz in the Table of Frequency Allocations (CPM Report
Methods C3a (1/1.5/5.3.3.1) and C3b (1/1.5/5.3.3.2)).

ARTICLE 5

Frequency allocations

Section IV -- Table of Frequency Allocations\
(See No. 2.1)

**[NOC]{.underline}** ASP/41A5/49

4 800-5 570 MHz

**Reasons:** ITU-R studies have not been able to adequately demonstrate
that aeronautical mobile telemetry in the 5 150-5 250 MHz band is
compatible with existing services. The 5 150-5 250 MHz band is already
encumbered by existing allocations and the addition of AMT will result
in excessive interference and constraints to the MSS feeder links, RDSS
feeder links and MS (WAS).

# Issue D

Introduction

APT members support the conclusion included in the CPM Report
(1/1.5/5.4) that no change is required.

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

[^1]: ^1^ *xx* equals 2% if the Conference allocates aeronautical mobile
    telemetry, and 3% otherwise.