International Civil Aviation Organization
ACP WG-F/32 WP09
Aeronautical Communications Panel Working Group F Meeting 32
Cairo, Egypt
February 16-24, 2015
Development of potential updates to ICAO WRC-15 Position
Update of Draft CPM Text Regarding WRC-15 AI 1.17
(Presented by Joseph Cramer)
SUMMARY
This paper provides an update of the contents of the Draft Conference
Preparatory Meeting text for WRC-15 Agenda Item 1.17.
ACTION
It is proposed that ICAO consider the information provided in this document
during deliberations regarding modifications to the ICAO position for WRC15 AI 1.17.
INTRODUCTION
1.1
The ICAO position regarding Agenda Item 1.17 (AI 1.17) supports a global aeronautical mobile
(route) service allocation in the frequency band 4 200 – 4 400 MHz exclusively reserved for Wireless
Avionics Intra-Communications (WAIC) systems operating in accordance with recognized international
aeronautical standards. This position takes into consideration the aviation community’s effort over the
past 7 years to determine the best possible radio frequency spectrum for WAIC systems. Annex 1
contains the current ICAO position.
1.2
Consistent with ICAO’s position, ICAO submitted a liaison statement to the May 2014 meeting
of ITU-R Working Party 5B stating ICAO is of the view that, WAIC systems in accordance with Report
ITU-R M 2283 and radio altimeters in accordance with Recommendation ITU-R M 2059 can be
integrated onboard an aircraft in a manner ensuring they are mutually compatible. This view is consistent
with and fully supported by the aircraft manufacturers and the aerospace industry.
1.3
In order to help meeting participants better understand possible discussions and potential areas of
contention that might occur surrounding AI 1.17 during the Conference Preparatory Meeting (CPM), this
paper provides information regarding the development of the draft CPM text and information regarding
possible inputs from several Administrations to the CPM. The paper also suggests modifications to the
Discussion Section of the ICAO position in order to better clarify the reasoning behind and benefits
derived from this Agenda Item. For reference, the draft CPM text is provided in Annex 3.
DISCUSSION
2.1
Agenda item 1.17 considers the spectrum requirements and regulatory actions to support WAIC
systems. WAIC system technical and operational characteristics are provided in Report ITU-R M.2283.
WAIC systems are limited to radio communications between two or more stations on-board a single
aircraft supporting the safe operation of the aircraft.
2.2
An analysis was conducted of all AM(R)S, AMS and ARNS frequency bands below 15.7 GHz.
The results can be found in ITU-R Report ITU-R M. 2318. Of the many frequency bands analyzed,
studies were performed analyzing the compatibility between proposed WAIC systems and incumbent
systems and services in the frequency bands 2 700-2 900 MHz, 4 200-4 400 MHz, 5 350-5 460 MHz,
22.5-22.55 GHz, and 23.55-23.6 GHz. Of the frequency bands studied, only the frequency band 4 200-4
400 MHz show sharing is feasible. The study can be found in ITU-R Report ITU-R M. 2319.
2.3
While only one frequency band is being considered for WAIC systems, two methods to address
the agenda item are currently proposed in the Draft CPM text. Both methods are consistent in proposing
to allocate the band 4200-4400 MHz to the AM(R)S on a primary basis limited to WAIC systems. There
is no proposal for “no change” or (NOC) in the Draft CPM text.
2.4
The first method (Method A) adds a primary AM(R)S allocation to the frequency band 4 200 –
4400 MHz. Relevant footnotes are modified and a new footnote is added to limit the AM(R)S use to
WAIC systems, maintain the status of passive sensing in the Earth exploration satellite service (EESS)
and Space research service (SRS), and maintain the status and use of the Aeronautical radionavigation
service (ARNS). The ARNS is limited to radio altimeters. A new Resolution to be incorporated by
reference in the radio regulations is proposed in Method A. The method contains three different options
for this new Resolution XXX (WRC-15), discussed below. There is also an option to provide a footnote
containing the essential aspects of the resolutions, particularly; the definition for WAIC, the primacy of
radio altimeters over WAIC, and excluding Article 43.1 from AM(R)S systems in the frequency band
4200 – 4 400 MHz.
2.5
The second method (Method B), also provides an AM(R)S allocation to the frequency band 4 200
– 4 400 MHz and preserves the status of the EESS and SRS, as well as maintains the use and status of the
ARNS. However, Method B proposes a recommendation to be incorporated by reference. This
recommendation is very similar to Option 3 in Method A.
1. Options being considered in Method A.
2.6
Options 1 and 2 are the same except for an additional considering in Option 2. This considering
states: “that under some limited circumstances, operational measures might be considered to ensure
compatibility between WAIC systems operating in the band 4 200-4 400 MHz and nearby FSS systems
operating below 4 200 MHz.” Annex 2 contains the draft CPM text showing of Options 1 and 2 with the
additional language found in considering i) and is also underlined.
2.7
The resolution in Method A, Option 3 provides similar language as Option 1 and 2. However, the
resolves section is significantly different because it requires specific aggregate e.i.r.p. limits based upon
the angle with the vertical axis of the aircraft (in degrees). As discussed below, it is anticipated that the
e.i.r.p. limits as expressed will be modified at the upcoming conference preparatory meeting.
2. Method B
2.8
Method B makes similar changes to the radio regulations as found in Method A, Option 3.
However, this method mandates a Recommendation be incorporated by reference in the footnote. The
text of the recommendation is not incorporated in the Draft CPM text. If this method is going to be
considered, then the recommendation must be finalized by WRC-15.
3. Alternative Footnote Proposal
2.9
A sub option was developed at the ITU-R Working Party 5B meeting proposing to utilize a
footnote to express the most important regulatory aspects of the resolution and recommendation
proposals. The text of this footnote is provided below:
5.XXX Use of the frequency band 4 200-4 400 MHz by stations in the aeronautical
mobile (R) service is reserved exclusively for wireless avionics intra-communications
systems that operate in accordance with recognized international aeronautical standards.
These systems shall not cause harmful interference to, nor claim protection from the
aeronautical radionavigation service. Wireless avionics intra-communications (WAIC) is
defined as radiocommunication between two or more aircraft stations located on a single
aircraft; supporting the safe operation of the aircraft. No. 43.1 shall not apply.
2.10
This footnote incorporates all of the most important aspects of the various options in Method A,
namely: limit use by the AM(R)S service to WAIC systems; provide a higher priority to radio altimeter
systems; define WAIC systems without modifying Article 1; and state that Article 43.1 shall not apply to
WAIC systems. There will be a proposal to the conference preparatory meeting to formalize this footnote
as a separate option under Method A.
2.11
The CPM meeting will discuss where to properly locate this alternative text proposal as well as
attempt to reduce the number of options within Method A, and possibly reduce the number of Methods.
3.
MODIFICATIONS TO ICAO POSITION
3.1
The ICAO position contains a discussion section that was agreed prior to the conclusion of
editing the draft CPM text. Changes to the ICAO Discussion section were made at the September 2014
ICAO Working Group F meeting in Seattle and are shown via “track changes”. Additional modifications
are proposed in this document to better clarify and expand upon the reasoning for ICAO’s support of the
agenda item and the benefits derived by airlines, aircraft manufacturers, and aerospace industry as a
whole.
3.2
The language in the draft CPM text provides a clear and concise description of the agenda item
benefits, the issue and WAIC system characteristics. Therefore some additional modifications to the
Discussion Section are provided in Annex 2 for consideration by the meeting. No modification is
proposed to the ICAO position; and the changes proposed are consistent with the ICAO position. The
proposed changes for this meeting are highlighted in yellow.
ACTION BY THE MEETING
4.1
It is proposed the meeting review and accept the proposed changes to the Discussion
section of the ICAO WRC-1.17 Position.
Annex 1
Current ICAO Position
WRC-15 Agenda Item 1.17
Agenda Item Title:
To consider possible spectrum requirements and regulatory actions, including appropriate
aeronautical allocations, to support wireless avionics intra-communications (WAIC), in
accordance with Resolution 423 (WRC-12);
Discussion:
The civil aviation industry is developing the future generation of aircraft. This future generation is being
designed to enhance efficiency and reliability while maintaining, current required levels of safety as a
minimum. The use of wireless technologies in the aircraft may reduce the overall weight of systems,
reducing the amount of fuel required to fly and thus benefiting the environment.
Wireless Avionics Intra-Communications (WAIC) systems provide one way to derive these benefits.
WAIC systems provide for radiocommunication between two or more points on a single aircraft and
constitute exclusive closed on board networks required for the operation of an aircraft. WAIC systems do
not provide air-to-ground, air-to-satellite or air-to-air communications. WAIC systems will only be used
for safety-related aircraft applications.
Resolution 423 calls for consideration to be initially given to frequency bands currently allocated to
aeronautical services (AMS, AM(R)S and ARNS) on a worldwide basis. If existing aeronautical bands
cannot support the WAIC spectrum requirements, then new aeronautical allocations should be considered.
WAIC is a communication system which carries aeronautical safety related content and should
therefore be seen as an application of the aeronautical mobile (route) service (AM(R)S). Initially the
spectrum requirements for WAIC need to be identified to evaluate the possible use of existing AM(R)S
allocations, and as such, if the spectrum requirements cannot be met then additional AM(R)S allocations
are required.
Based on the analysis contained in Preliminary Draft New Report ITU-R M.[WAIC BANDS] the
frequency bands 2 700-2 900 MHz, 4 200-4 400 MHz, 5 350-5 460 MHz, 22.5-22.55 GHz, and 23.5523.6 GHz were considered for additional sharing and compatibility studies between WAIC systems and
incumbent services. Of these bands, the band 4 200-4 400 MHz was found to be suitable for the intended
use for WAIC systems. Use of the band 4 200-4 400 MHz by the radio navigation service is reserved for
radio altimeters. The compatibility between WAIC systems and radio altimeters has been confirmed
within Working Group F and ITU-R Working Party 5B. These studies are contained in Draft New Report
ITU-R M.[WAIC_SHARING_4200-4400MHz].
ICAO Position:
Support a global aeronautical mobile (route) service
allocation in the frequency band 4 200 – 4 400 MHz
exclusively reserved for Wireless Avionics IntraCommunications (WAIC) systems operating in accordance
with recognized international aeronautical standards.
Annex 2
Proposed Changes to ICAO Position
WRC-15 Agenda Item 1.17
Agenda Item Title:
To consider possible spectrum requirements and regulatory actions, including appropriate
aeronautical allocations, to support wireless avionics intra-communications (WAIC), in
accordance with Resolution 423 (WRC-12);
Discussion:
“The civil aviation industry is constantly developing the future generation of aircraft. Each subsequent
generation is being designed to enhance efficiency and reliability while maintaining current required
levels of safety. The use of wireless technologies in the aircraft may reduce the overall weight of
systems, reducing the amount of fuel required to fly and thus benefiting the environment.
Wireless Avionics Intra-Communications (WAIC) systems will offer aircraft designers and operators
opportunities to improve flight safety and operational efficiency with the goal of reducing costs to airlines
and passengers. WAIC systems could improve an aircraft’s performance over its lifetime through more
cost-effective flight operations, reduction in maintenance costs, enhancement of aircraft systems that
maintain or increase the level of safety, and environmental benefits. WAIC systems are also envisioned to
provide new functionalities to aircraft manufacturers and operators.
Manufacturers are provided additional installation options for previously wired systems, while operators
are afforded more opportunities to monitor aircraft systems. A major WAIC system application is
wireless sensing. It is expected that existing and future aircraft will be equipped with such wireless
sensors. These sensors could be located throughout the aircraft and will be used to monitor the health of
the aircraft structure and its critical systems, and to communicate this information. WAIC systems are
also intended to support data, voice and safety related video surveillance applications such as taxiing
cameras and may also include communications systems used by the crew for safe operation of the aircraft.
WAIC systems can provide additional opportunities to monitor more components and systems without
significantly increasing the aircraft’s weight.
WAIC systems provide one way to derive these benefits. WAIC systems provide for radiocommunication
between two or more points on a single aircraft and constitute exclusive closed on board networks
required for the aircraft’s operation. WAIC systems do not provide air-to-ground, air-to-satellite or air-toair communications.
WAIC is a communication system which only carries aeronautical safety related content and should
therefore be seen as an application of the aeronautical mobile (route) service (AM(R)S). The spectrum
requirements for WAIC systems were identified to evaluate the possible use of existing AM(R)S
allocations. However, since the spectrum requirements could not be met in those bands, additional
AM(R)S allocations were required.
Based on the analysis contained in Report ITU-R M. 2138 the frequency bands 2 700-2 900 MHz, 4 2004 400 MHz, 5 350-5 460 MHz, 22.5-22.55 GHz, and 23.55-23.6 GHz were considered for additional
sharing and compatibility studies between WAIC systems and incumbent services. Of these bands, the
band 4 200-4 400 MHz was found to be suitable for the intended use for WAIC systems. Use of the band
4 200-4 400 MHz by the radio navigation service is reserved for radio altimeters. The compatibility
between WAIC systems and radio altimeters has been confirmed within Working Group F and ITU-R
Working Party 5B. These studies are contained in Report ITU-R M. 2139. ”
ICAO Position:
Support a global aeronautical mobile (route) service
allocation in the frequency band 4 200 – 4 400 MHz
exclusively reserved for Wireless Avionics IntraCommunications (WAIC) systems operating in accordance
with recognized international aeronautical standards.
Annex 3
Draft CPM Text for Agenda Item 1.17
AGENDA ITEM 1.17
(WP 5B / WP 4A, WP 4C, WP 5A, WP 5C, WP 7B, WP 7C, WP 7D,
(WP 1B), (WP 3K), (WP 6A))
1.17
to consider possible spectrum requirements and regulatory actions, including
appropriate aeronautical allocations, to support wireless avionics intra-communications
(WAIC), in accordance with Resolution 423 (WRC-12);
Resolution 423 (WRC-12): Consideration of regulatory actions, including allocations, to
support Wireless Avionics Intra-Communications
3/1.17/1
Executive summary
The 2012 World Radiocommunication Conference (WRC-12) approved agenda item 1.17 to
conduct sharing and compatibility studies to determine appropriate frequency bands for wireless
avionics intra-communications (WAIC) systems. According to Resolution 423 (WRC-12) the
frequency bands to be initially reviewed are limited to those frequency bands containing
allocations to the aeronautical mobile (R) service (AM(R)S), aeronautical mobile service (AMS)
and aeronautical radionavigation service (ARNS) below 15.7 GHz. In addition, frequency bands
above 15.7 GHz can be studied if spectrum requirements cannot be met in frequency bands
allocated to the aeronautical services below 15.7 GHz.
Agenda item 1.17 considers the spectrum requirements and regulatory actions to support WAIC
systems. WAIC systems are described in Report ITU-R M.2283. WAIC systems utilize radio
communications between two or more stations on-board a single aircraft supporting the safe
operation of the aircraft. The Report concludes that 145 MHz of radio frequency spectrum is
necessary to support the requirements for WAIC systems.
In accordance with Resolution 423 (WRC-12), an initial assessment was conducted that analyses
potential compatibility between proposed WAIC systems and systems operating under an
allocation to an incumbent service. It considers all aeronautical bands in the frequency range
960 MHz-15.7 GHz containing either an AM(R)S, AMS, ARNS allocation.
Studies were conducted analysing potential compatibility between proposed WAIC systems and
systems operating under an allocation to an incumbent service in the frequency bands
2 700-2 900 MHz, 4 200-4 400 MHz, 5 350-5 460 MHz, 22.5-22.55 GHz, and 23.55-23.6 GHz.
Of the frequency bands below 15.7 GHz studied, only the frequency band 4 200-4 400 MHz
shows that sharing is feasible.
Two methods to address the agenda item are proposed. Method A adds a new allocation to the
AM(R)S reserved exclusively for WAIC systems in the frequency band 4 200-4 400 MHz with
three options for an accompanying Resolution. Method B provides the same regulatory changes
as Method A, except it proposes an ITU-R Recommendation incorporated by reference.
3/1.17/2 Background
The civil aviation industry is continually developing future generations of aircraft. Each
subsequent generation is designed to enhance efficiency and reliability while maintaining current
required levels of safety. WAIC systems will offer aircraft designers and operators opportunities
to improve flight safety and operational efficiency with the goal of reducing costs to airlines and
passengers. WAIC systems could improve an aircraft’s performance over its lifetime through
more cost-effective flight operations, reduction in maintenance costs, enhancement of aircraft
systems that maintain or increase the level of safety, and environmental benefits. WAIC systems
are also envisioned to provide new functionalities to aircraft manufacturers and operators.
Manufacturers are provided additional installation options for previously wired systems, while
operators are afforded more opportunities to monitor aircraft systems. A major WAIC system
application is wireless sensing. It is expected that existing and future aircraft will be equipped
with such wireless sensors. These sensors could be located throughout the aircraft and will be
used to monitor the health of the aircraft structure and its critical systems, and to communicate
this information. WAIC systems are also intended to support data, voice and safety related video
surveillance applications such as taxiing cameras and may also include communications systems
used by the crew for safe operation of the aircraft. WAIC systems can provide additional
opportunities to monitor more components and systems without significantly increasing the
aircraft’s weight.
WAIC systems will only be used for safety-related aircraft applications, providing
communications within a single aircraft. While WAIC system transmissions may not be limited
to the interior of the aircraft structure, they will not provide communications between an aircraft
and the ground, another aircraft or satellite. Because WAIC systems carry aeronautical safety
related content they are classified as an application of the AM(R)S.
The total radio frequency spectrum required for all types of WAIC application categories is
145 MHz. To reflect the diverging conditions and requirements, different categories of WAIC
systems are defined. These are based on the two criteria “data rate requirements” and “transmit
antenna location on the aircraft”, i.e. internal or external to the aircraft structure. For determining
bandwidth requirements, low rate and high rate systems are separately considered due to
differing technical requirements and technological restrictions their implementation may face.
Given the fact that both the radio altimeter and WAIC systems are aeronautical applications and
are also regulated by aviation certification authorities as well as ICAO, additional efforts,
including development of standards and certification guidance material within the aviation
community could contribute in ensuring the safe operation of WAIC and radio altimeter systems.
Further information on WAIC system technical and operational characteristics can be found in
the Report ITU-R M.2283.
3/1.17/3 Summary of technical and operational studies, including a list of
relevant ITU-R Recommendations
Existing relevant ITU-R Recommendations:
Recommendation ITU-R P.525.
Existing relevant ITU-R Reports:
Report ITU-R M.2283.
New relevant ITU-R Recommendations:
WDPDN Recommendation ITU-R M.[WAIC]; WDPDN Recommendation ITU-R M.[WAIC
CONDITIONS].
New relevant ITU-R Reports: PDN Report ITU-R M.[WAIC_SHARING_4 200-4 400 MHz];
PDN Report ITU-R M.[WAIC BANDS]; WDPDN Report ITU-R M.[WAIC_SHARING_22/23
GHz].
3/1.17/4 Analysis of the results of studies
3/1.17/4.1 Analysis of the frequency bands below 15.7 GHz
PDN Report M.[WAIC_BANDS] contains the results of assessments and studies of the
frequency bands between 960 MHz and 15.7 GHz considered under WRC-15 agenda item 1.17.
Frequency bands below 960 MHz were assessed and do not support the implementation of
WAIC systems as antenna sizes are too large given the space available on-board aircraft.
The current frequency bands allocated to the AM(R)S; 960-1 164 MHz, 5 030-5 091 MHz and
5 091-5 150 MHz were found to not be appropriate to accommodate WAIC systems, considering
the numerous existing and planned applications in these frequency bands.
Out of the frequency bands assessed, the frequency bands 2 700-2 900 MHz, 4 200-4 400 MHz,
5 350-5 460 MHz were considered for further study. Results of the studies for the frequency
bands 2 700-2 900 MHz and 5 350-5 460 MHz show that sharing between WAIC systems and
existing systems is not feasible. Therefore, these frequency bands were not considered to be a
candidate for WAIC systems.
Studies contained in PDN Report ITU-R M.[WAIC_SHARING_4 200-4 400 MHz] show
compatibility between WAIC systems and incumbent systems in the frequency band 4 2004 400 MHz, provided that suitable measures for outside applications such as the use of
directional antennas and reduced transmit power are undertaken.
In addressing this agenda item it was proposed that an adjacent band study should be carried out
with FSS VSAT's operating below 4 200 MHz. However, based on the low WAIC power level it
was agreed that an adjacent band study would not be required as the separation distance were
expected to be in the range of 50-100 m.
3/1.17/4.2 Analysis of the frequency bands above 15.7 GHz
Compatibility studies between WAIC systems and systems operating in the FS and the AMS in
the frequency bands 22.5-22.55 GHz and 23.55-23.6 GHz show that WAIC systems are
compatible with EESS (passive) and RAS systems, in the adjacent frequency bands 22.21-22.5
GHz and 23.6-24 GHz. However, additional work has yet to be conducted to show compatibility
with the incumbent FS.
3/1.17/5 Method(s) to satisfy the agenda item
There are 2 Methods to satisfy the agenda item:
3/1.17/5.1 Method A
Adds a primary AM(R)S allocation to the frequency band 4 200-4 400 MHz. Relevant footnotes
are modified and new footnotes are added to limit the use to WAIC systems, maintain the status
of passive sensing in the EESS and SRS, and maintain the use of the ARNS. A new Resolution is
proposed in Method A. The method contains three different options for this new Resolution
[A117-WAIC] (WRC-15) in order to satisfy the agenda item.
Advantages (For Options 1, 2, 3)
–
–
–
–
Provides a primary AM(R)S allocation limited to WAIC systems.
Ensures mandatory protection of the ARNS reserved exclusively for radio altimeters.
Provides worldwide harmonized frequency spectrum for WAIC systems.
Provides the required wideband spectrum for implementation of WAIC systems.
Disadvantages (for Options 1 and 2)
–
None.
Disadvantages (for Option 3)
–
May require a specific WRC agenda item in order to modify Resolution [A117WAIC] (WRC-15) referred to in Option 3.
–
Defining in a Resolution the maximum e.i.r.p. level an aircraft is allowed to radiate
may unnecessarily restrict the design and improvements of WAIC systems.
3/1.17/5.2 Method B
This method is based on Method A option 3. However instead of referencing a WRC Resolution
in a footnote it uses an ITU-R Recommendation incorporated by reference through the same
footnote.
Advantages
–
–
–
Provides a primary AM(R)S allocation limited to WAIC systems.
Provides worldwide harmonized frequency spectrum for WAIC systems.
Provides the required wideband spectrum for implementation of WAIC systems.
–
Provides the ability to update the recommendation incorporated by reference without
a need for a specific WRC agenda item.
Ensures protection of the ARNS reserved exclusively for radio altimeters as
described in Recommendation ITU-R M.2059 since the quantified conditions based
on the results of the sharing studies would be mandatory.
–
Disadvantages
–
Should WRC-15 not decide to incorporate the ITU-R Recommendation in the Radio
Regulations, the mandatory protection of radio altimeter would not be appropriately
achieved under this method.
–
Defining the maximum e.i.r.p. level an aircraft is allowed to radiate as described in
recommends 4 of WDPDN Recommendation ITU-R M.[WAIC CONDITIONS] may
unnecessarily restrict the design and improvements of WAIC systems.
3/1.17/6 Regulatory and procedural considerations
3/1.17/6.1 Method A
ARTICLE 5
Frequency allocations
Section IV – Table of Frequency Allocations
(See No. 2.1)
MOD
2 700-4 800 MHz
Allocation to services
Region 1
…/…
4 200-4 400
Region 2
Region 3
AERONAUTICAL MOBILE (R) ADD 5.A117
AERONAUTICAL RADIONAVIGATION MOD 5.438
5.439 5.440 ADD 5.B117
…/…
MOD
5.438
Use of the band 4 200-4 400 MHz by the aeronautical radionavigation service is
reserved exclusively for radio altimeters installed on board aircraft and for the associated
transponders on the ground.
ADD
5.A117
Use of the frequency band 4 200-4 400 MHz by stations in the aeronautical mobile
(R) service is reserved exclusively for wireless avionics intra-communication systems that
operate in accordance with recognized international aeronautical standards. Such use shall be in
accordance with Resolution [A117-WAIC] (WRC-15).
Reasons: This footnote makes reference to the following Resolution [A117-WAIC] (WRC-15).
See also below the alternative text option for ADD 5.A117.
ADD
5.A117
Use of the frequency band 4 200-4 400 MHz by stations in the aeronautical mobile
(R) service is reserved exclusively for wireless avionics intra-communication systems that
operate in accordance with recognized international aeronautical standards. These systems shall
not cause harmful interference to, nor claim protection from, the aeronautical radionavigation
service. Wireless Avionics Intra-Communications (WAIC) is defined as radiocommunication
between two or more aircraft stations located on a single aircraft, supporting the safe operation of
the aircraft. No. 43.1 shall not apply.
Reasons: This alternative text for ADD 5.A117 may not require the following Resolution
[A117-WAIC] (WRC-15).
ADD
5.B117
Passive sensing in the Earth exploration-satellite and space research services may be
authorized in the frequency band 4 200-4 400 MHz on a secondary basis.
SUP
RESOLUTION 423 (WRC-12)
Consideration of regulatory actions, including allocations, to support
Wireless Avionics Intra-Communications
3/1.17/6.1.1
Method A Option 1 for Resolution [A.117-WAIC] (WRC-15):
Option 1 provides relevant regulatory provisions to satisfy the agenda item.
ADD
RESOLUTION [A117-WAIC-OPTION-1] (WRC-15)
Conditions for the use of Wireless Avionics Intra-Communications
The World Radiocommunication Conference (Geneva, 2015),
considering
a)
that aircraft are being designed to enhance efficiency, reliability and safety, as well as to
be more environmentally friendly;
b)
that Wireless Avionics Intra-Communications (WAIC) systems provide
radiocommunications between two or more points integrated into or installed on a single aircraft;
c)
that WAIC systems do not provide radiocommunications between an aircraft and the
ground, another aircraft or satellite;
d)
that WAIC systems must operate in a manner that ensures the safe operation of an
aircraft;
e)
that WAIC systems will operate during all phases of flight, including on the ground;
f)
that aircraft equipped with WAIC systems will be operated worldwide and will cross
national borders;
g)
that WAIC systems operating inside an aircraft will receive the benefits of fuselage
attenuation to facilitate sharing with other services;
h)
that Recommendation ITU-R M.[WAIC] provides technical characteristics and
operational objectives for WAIC systems,
recognizing
a)
that Annex 10 to the Convention on International Civil Aviation contains Standards and
Recommended Practices (SARPs) for aeronautical radionavigation and radiocommunication
systems used by international civil aviation,
resolves
1
that WAIC is radiocommunication between two or more aircraft stations located on a
single aircraft, supporting the safe operation of the aircraft;
2
that the aeronautical mobile (route) service systems operating in the frequency band
4 200-4 400 MHz shall not cause harmful interference to, nor claim protection from, aeronautical
radionavigation service systems in this band;
3
that the aeronautical mobile (route) service systems operating in the frequency band
4 200-4 400 MHz shall meet SARPs requirements published in Annex 10 to the Convention on
International Civil Aviation;
4
that No. 43.1 shall not apply for aeronautical mobile (route) service allocations in the
frequency bands identified in Article 5 for WAIC systems,
instructs the Secretary-General
to bring this Resolution to the attention of ICAO.
3/1.17/6.1.2
Method A Option 2 for Resolution [A117-WAIC] (WRC-15):
Option 2 provides an additional considering i).
ADD
RESOLUTION [A117-WAIC-OPTION-2] (WRC-15)
Conditions for the use of Wireless Avionics Intra-Communications
The World Radiocommunication Conference (Geneva, 2015),
considering
{Note: considering a) to h) identical with Option 1}
i)
that under some limited circumstances, operational measures might be considered to
ensure compatibility between WAIC systems operating in the band 4 200-4 400 MHz and nearby
FSS systems operating below 4 200 MHz,
recognizing
{Note: recognizing a) identical with Option 1}
resolves
{Note: resolves 1 to 4 identical with Option 1}
instructs the Secretary-General
{Note: instructs the Secretary-General identical with Option 1}.
3/1.17/6.1.3
Method A Option 3 for Resolution [A117-WAIC] (WRC-15):
Option 3 provides relevant regulatory provisions to satisfy the agenda item by the addition of a
resolves to the Resolution given in Option 1, moreover two considerings and one recognizing are
also added.
ADD
RESOLUTION [A117-WAIC-OPTION-3] (WRC-15)
Conditions for the use of Wireless Avionics Intra-Communications
The World Radiocommunication Conference (Geneva, 2015),
considering
a)
that the frequency band 4 200-4 400 MHz is allocated to the aeronautical radionavigation service
(ARNS) on a primary basis, limited to radio altimeters, and in one country, to the fixed service on a
secondary basis, according to No. 5.439;
b)
that in the frequency band 4 200-4 400 MHz the Earth exploration-satellite (passive) and space
research services may be authorized in the frequency band on a secondary basis, according to No. 5.438;
c)
that the future generations of aircraft are being designed to enhance efficiency, reliability and
safety, as well as to be more environmentally friendly;
d)
that Wireless Avionics Intra-Communications (WAIC) systems provide radiocommunications
between two or more points integrated into or installed on a single aircraft;
e)
that WAIC systems do not provide radiocommunications between an aircraft and the ground,
another aircraft or satellite;
f)
that WAIC systems must operate in a manner that ensures the safe operation of an aircraft;
g)
that WAIC systems will operate during all phases of flight, including on the ground;
h)
that aircraft equipped with WAIC systems will be operated worldwide and will cross national
borders;
i)
that WAIC systems operating inside an aircraft will receive the benefits of fuselage attenuation to
facilitate sharing with other services;
j)
that Recommendation ITU-R M.[WAIC] provides technical characteristics and operational
objectives for WAIC systems,
recognizing
that Annex 10 to the Convention on International Civil Aviation contains Standards and Recommended
Practices (SARPs) for aeronautical radionavigation and radiocommunication systems used by
international civil aviation,
resolves
1
that WAIC is defined as radiocommunication between two or more aircraft stations located on a
single aircraft, supporting the safe operation of the aircraft;
2
that the aeronautical mobile (R) service (AM(R)S) systems operating in the frequency band
4 200-4 400 MHz shall meet Standards and Recommended Practices (SARPs) requirements published in
Annex 10 to the Convention on International Civil Aviation;
3
that the AM(R)S systems operating in the band 4 200-4 400 MHz shall not cause harmful
interference to, nor claim protection from aeronautical radionavigation service systems in this band;
4
that in order to not cause harmful interference to the incumbent services, the aggregate equivalent
isotropically radiated power (e.i.r.p.) for outside WAIC systems in the AM(R)S shall be limited to the
values presented in the following table:
Angle with vertical axis of the aircraft,
θ (degrees)
Aggregate e.i.r.p. limits (dBm)
0 ≤ θ < 70
−20
70 ≤ θ < 78
−15
78 ≤ θ < 86
−2
86 ≤ θ < 120
3
120 ≤ θ ≤ 180
20
where θ is the rotationally symmetrical angle of the direction considered with the vertical axis referred to
the aircraft. θ = 0 in the vertical (zenith) direction;
5
that No. 43.1 does not apply for aeronautical mobile (R) service allocation in frequency bands
identified in Article 5 for WAIC systems,
instructs the Director of the Radiocommunication Bureau
to report to the next WRC on implementation of this Resolution,
instructs the Secretary-General
to bring this Resolution to the attention of ICAO.
3/1.17/6.2 Method B
ARTICLE 5
Frequency allocations
Section IV – Table of Frequency Allocations
(See No. 2.1)
MOD
2 700-4 800 MHz
Allocation to services
Region 1
…/…
4 200-4 400
Region 2
Region 3
AERONAUTICAL MOBILE (R) ADD 5.C117
AERONAUTICAL RADIONAVIGATION MOD 5.438
5.439 5.440 ADD 5.B117
…/…
MOD
5.438
Use of the band 4 200-4 400 MHz by the aeronautical radionavigation service is
reserved exclusively for radio altimeters installed on board aircraft and for the associated
transponders on the ground.
ADD
5.C117
Use of the frequency band 4 200-4 400 MHz by stations in the aeronautical mobile
(R) service is reserved exclusively for wireless avionics intra-communication systems that
operate in accordance with recognized international aeronautical standards. Such use shall be in
accordance with Recommendation ITU-R M.[WAIC CONDITIONS].
Reasons: To reserve the use of the proposed new AM(R)S allocation in the frequency band
4 200-4 400 MHz exclusively for WAIC systems in accordance with Recommendation ITU-R
M.[WAIC CONDITIONS] to be incorporated by reference in the RR. See also below the
alternative text option for ADD 5.C117.
ADD
5.C117
Use of the frequency band 4 200-4 400 MHz by stations in the aeronautical mobile
(R) service is reserved exclusively for wireless avionics intra-communication systems that
operate in accordance with recognized international aeronautical standards. These systems shall
not cause harmful interference to, nor claim protection from, the aeronautical radionavigation
service. Wireless Avionics Intra-Communications (WAIC) is defined as radiocommunication
between two or more aircraft stations located on a single aircraft, supporting the safe operation of
the aircraft. Such use shall be in accordance with Recommendation ITU-R
M.[WAIC CONDITIONS]. No. 43.1 shall not apply.
Reasons: Same purposes as in the first text option above and, in addition, to provide other
restriction of use with respect to ARNS, define WAIC and exclude application of RR No. 43.1.
ADD
5.B117
Passive sensing in the Earth exploration-satellite and space research services may be
authorized in the frequency band 4 200-4 400 MHz on a secondary basis.
SUP
RESOLUTION 423 (WRC-12)
Consideration of regulatory actions, including allocations, to support
Wireless Avionics Intra-Communications