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

                                                   

                                                   

  **PLENARY MEETING**                              **Addendum 4 to Document 43-E**

                                                   **3 September 2007**

                                                   **Original: English**

  African Telecommunications Union Administrations 

  AFRICAN COMMON Proposals for\                    
  the work of the Conference                       

  Agenda item 1.5                                  
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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)**

Resolution 230 (WRC-03) -- Consideration of mobile allocations for
wideband aeronautical telemetry and associated telecommand

Introduction

The African Administrations support (Method C2) the use of the band 5
091-5 150 MHz for telemetry subject to providing precedence for
satisfying the requirements for microwave landing system (MLS) over
other uses of this band (e.g. fixed-satellite service, aeronautical
mobile (R) or telemetry). It is expected that only a part of this band
is required for MLS in highly congested areas. More specifically, Method
C2b is supported. This will provide an allocation to the mobile service,
including the aeronautical mobile service in the band 5 091-5 150 MHz,
limited aeronautical mobile telemetry (AMT) for flight testing under the
condition that, if an allocation is made to the aeronautical mobile
satellite (R) service in this band (AM(R)S), the AM(R)S shall have
precedence over the use of the band by the aeronautical telemetry.

The African Administrations would like to see the limitation for using
this band for flight testing only deleted. This would offer a more
flexible use of this band for telemetry applications by aviation. The
proposed regulatory provisions are adequate to protect MLS and AM(R)S.

The amendments to the Radio Regulations, as proposed below, are
consistent with Method C2 contained in the CPM Report.

ARTICLE 5

Frequency allocations

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

**MOD** AFCP/43A4/1

4 800-5 570 MHz

**[NOC]{.underline}** AFCP/43A4/2

**5.444** The band 5 030-5 150 MHz is to be used for the operation of
the international standard system (microwave landing system) for
precision approach and landing. The requirements of this system shall
take precedence over other uses of this band. For the use of this band,
No. **5.444A** and Resolution **114 (Rev.WRC‑03)** apply.     (WRC-03)

**[NOC]{.underline}** AFCP/43A4/3

**5.444A** *Additional allocation:  *the band 5 091-5 150 MHz is also
allocated to the fixed-satellite service (Earth-to-space) on a primary
basis. This 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**.

In the band 5 091-5 150 MHz, the following conditions also apply:

-- prior to 1 January 2018, the use of the band 5 091-5 150 MHz by
feeder links of non‑geostationary-satellite systems in the
mobile-satellite service shall be made in accordance with
Resolution **114 (Rev.WRC‑03)**;

-- prior to 1 January 2018, the requirements of existing and planned
international standard systems for the aeronautical radionavigation
service which cannot be met in the 5 000-5 091 MHz band, shall take
precedence over other uses of this band;

-- after 1 January 2012, no new assignments shall be made to earth
stations providing feeder links of non-geostationary mobile-satellite
systems;

-- after 1 January 2018, the fixed-satellite service will become
secondary to the aeronautical radionavigation service.     (WRC-03)

**ADD** AFCP/43A4/4

**5.A05** 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 standards. Such use shall be in accordance with Resolution
**\[AM(R)S-5GHz\] (WRC-07)**.

**ADD** AFCP/43A4/5

**5.B05** *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 this by the aeronautical mobile service.

**Reasons:**

a\) ITU-R studies show that planned AMT can be precluded from
interfering with MLS through the use of adequate frequency separation.
Due to the expected lower density use of this band for MLS, provision of
that frequency separation should be simpler.

b\) That provisions in Article 5 that identify 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 these bands.

c\) Administrations will have the assurance that ITU-R studies have
demonstrated that telemetry systems can be implemented compatibly with
other services allocated in these bands, provided that the appropriate
sharing conditions specified in the proposed Resolutions are maintained.

d\) This WRC-07 recognition will give manufacturers and test range
operators a measure of certainty for the substantial investment in range
infrastructure that will be incurred and is consistent with
long-standing ITU-R practice.

**ADD** AFCP/43A4/6

RESOLUTION \[AM(R)S**-**5 GHz\] (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
(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)* 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)* 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:** See texts of Reasons pertaining to proposals AFCP/43A4/1 to
5.

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