ACP-WGW/TD-04
International Civil Aviation Organization
26/04/05
WORKING PAPER
AERONAUTICAL COMMUNICATIONS PANEL (ACP)
FIRST MEETING OF THE WORKING GROUP OF THE WHOLE
Montreal, Canada 21 – 29 June 2005
Agenda Item 7: Future Work
Proposed future Work Programme and list of tasks for WGN
(Presented by the Working Group N Rapporteur)
SUMMARY
This paper provides the details of the future work programme as envisaged by
WGN, and in accordance with the structure proposed by Flimsy 1.
ACTION
The meeting is invited to note the information provided.
1.
INTRODUCTION
1.1
The present information paper refines and provides further information about the future
work programme of WGN which was included in ACP WGW01 WP15, section 9.
1.2
Flimsy 1.
2.
The details for each task are provided in conformance with the structure requested by
DISCUSSION
2.1
Each task listed in ACP WGW01 WP15, section 9, is presented in a detailed manner, in
accordance with the 7 topics required by Flimsy 1. This is done in the tables provided as Attachment A.
3.
ACTION BY THE MEETING
3.1
(24 pages)
81918677
The ACP WGW is invited to note the information provided.
ACP-WGW01/TD-04
Title of task
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a) general task: Develop new SARPs or technical provisions for air-ground
and ground-ground aeronautical internetworking and applications,
including the completion of the following functions and enhancements to
existing SARPs or technical provisions
Objectives
This task is general in nature and is aimed at forming a superset of the
detailed WGN tasks which are described hereafter. There is
consequently a general objective which is to meet the operational
requirements of international civil aviation in terms of networking,
including the support of air-ground and ground-ground applications,
the use of up-to-date communication media, so as to deliver
communication networks and applications that are secure, efficient,
reliable and cost-effective.
Where the need has
been identified
Communications as an essential enabler of Air Traffic Management,
formally identified as such since the birth of the CNS/ATM concept.
Networks and applications, as handled by WGN, are key elements of
aeronautical communications, both for air-ground and ground-ground.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
Communications provide an essential contribution to the safety,
efficiency, regularity and security of international civil aviation.
Networks and applications, as handled by WGN, are key elements of
aeronautical communications, both for air-ground and ground-ground.
Primary user(s) of the
result
See each task below for details
Similar work done by
other standard-making
organizations
None for the overall subject. In general ICAO is either the primary
source of such standards, or builds aviation-suitable standards or
profiles based on mature existing base standards from the
telecommunication community (ITU-T, ISO, IETF, etc.). The ICAO
standards are then used to derive profiles specific to a given
aeronautical environment or operational objective. In a few cases
however, similar work may be done by other organizations (see details
in tasks below).
Expected form/size of
the result
In general, the WGN deliverables consist of:
 SARPs which are now limited to high level core SARPs
(included in Annex 10);
 technical provisions published as Manuals by ICAO. Until
now one such Manual, Document 9705 ("Manual of Technical
See each task below for more details
-3-


Provisions for the Aeronautical Telecommunication
Network"), has been produced by WGN and the bodies from
which WGN derives. This Manual comprises approximately
2100 pages. New provisions developed by WGN are expected
to be included in Doc 9705 or in new Manuals, which would
be similar in nature but of a lesser volume;
guidance material also published as Manuals Until now one
such Manual, Document 9739 ("Comprehensive ATN
Manual"), has been produced by WGN and the bodies from
which it derives;
reports intended for the Air Navigation Commission, and
developed in support or in preparation for the material above:
validation reports, report about the use of IPS as a provision
for aeronautical internetworking, etc.
See each task below for more details
Expected delivery date
ACP-WGW01/TD-04
See each task below for details
ACP-WGW01/TD-04
Title of task
-4-
b) develop SARPs and technical provisions for the use of the Internet
Protocol Suite (IPS) in CNS/ATM ground-ground communications;
Objectives
The goal of this task is to enable the use of the IPS as an internetwork
in support of ground-ground applications, in addition or as a substitute
to the current ATN Internet Communication Services. This will enable
the aeronautical community to use market driven technology and hence
to benefit from cost reductions, based on COTS product availability
and wider available expertise.
Where the need has
been identified
The task to consider the potential use of such protocols was initially
allocated to WGN as an outcome of the AMCP/8 meeting. The work
performed by WGN since that meeting, and reported in ACP WGW
WP16, concluded that the development of such SARPs and technical
provisions should be undertaken.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
The development of such SARPs and technical provisions, is of
primary importance to safety, regularity and security, but it does not
specifically enhance these in comparison with other ATN SARPs base
on ISO OSI. Economical efficiency may be enhanced by the use of
COTS products.
Primary user(s) of the
result
In the first instance, primary users of the developed standards are
implementers of CNS/ATM communication products. Primary final
users of the products developed in compliance to the standards are
ANSPs personnel in ATS Units and aerodromes.
Similar work done by
other standard-making
organizations
There is no known body developing equivalent standards.
Expected form/size of
the result
The result of this development will comprise:
 SARPs: amendments to and additional requirements in Annex
10 Volume III (maximum a few pages);
 technical provisions: amendments to and additional
requirements in Document 9705 (presumably a few tens of
pages). Alternatively, the development of a new Manual
dedicated to communications in the IPS environment could be
started;
 guidance material: to be included in Document 9739 (volume
-5-
ACP-WGW01/TD-04
unknown yet).
Expected delivery date
SARPs and technical provisions: T0 + 4 WGN meetings
guidance material: T0 + 5 to 6 WGN meetings
ACP-WGW01/TD-04
Title of task
-6-
c) study and resolve the technical issues, including mobility, security and
impact on applications, to enable the use of the Internet Protocol Suite
(IPS) in CNS/ATM air-ground communications;
Objectives
Some technical issues need to be studied, and solutions and/or workarounds determined, if existing, to enable the use of the Internet
Protocol Suite (IPS) in CNS/ATM air-ground communications
Where the need has
been identified
The task to consider the potential use of TCP/IP protocols in
aeronautical internetworking was initially allocated to WGN as the
outcome of the AMCP/8 meeting. The work performed by WGN since
that meeting, and reported in ACP WGW WP16, concluded that these
technical issues first need to be studied before ensuring that it is
technically feasible to use IPS in the air-ground environment. This is a
preliminary task to be performed before the development of SARPs
and technical provisions for use of IPS in CNS/ATM air-ground
communications is undertaken. It should be noted that the outcome in
terms of feasibility is uncertain yet.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
Like for task b), the outcome of this task is of utmost importance to
safety, regularity and security of civil aviation, but it does not
specifically bring enhancements compared to the current ATN
specification. Conversely, security is a bigger issue in the IPS
environment, due to the extensive range of possible attacks in this
technology environment, and as such it needs to be studied in-depth
before a conclusion to this task can be made.
Primary user(s) of the
result
This task being a preliminary task to task d) below, its direct users will
be the ANC, to which the results will be reported, and the ACP WGN
itself which will then start the development of SARPs and technical
provisions if feasibility is demonstrated.
Similar work done by
other standard-making
organizations
Similar work has been performed by AEEC (tbc) for other
communication categories, typically for AOC and APC. However
requirements in terms of mobility, service continuity are not the same
so, although similar, the conclusions of their work are not necessarily
applicable and useful for ATSC communications.
Expected form/size of
The expected outcome of this work is a document which will be used
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ACP-WGW01/TD-04
the result
internally to the ACP, and reported to the ICAO Secretariat and ANC.
Volume unknown and depending upon the magnitude of issues.
Expected delivery date
T0 + 3 or 4 WGN meetings
ACP-WGW01/TD-04
Title of task
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d) depending on the outcome of task c above, undertake the development
of SARPs and technical provisions for the introduction of the Internet
Protocol Suite (IPS) in support of future air-ground applications;
Objectives
The objective is, when technical issues associated with A/G use of IPS
are resolved as part of task c) above, to develop SARPs and technical
provisions for the use of IPS for future air-ground datalink
applications.
Where the need has
been identified
The task to consider the potential use of TCP/IP protocols in
aeronautical internetworking was initially allocated to WGN as the
outcome of the AMCP/8 meeting. It is a Secretariat request that this
task be undertaken. It should be noted that its actual start depends on
the outcome in terms of feasibility to be studied as part of task c).
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
Like for task c), the outcome of this task is of utmost importance to
safety, regularity and security of civil aviation, but it does not
specifically bring enhancements compared to the current ATN
specification. In the long term, some improvements can be expected in
terms of cost efficiency. However the need for certification of airborne
software prevents the possible use of COTS software on-board, thereby
limiting such cost benefits.
Primary user(s) of the
result
In the first instance, primary users of the developed standards are
implementers of CNS/ATM communication products, including
avionics vendors. Primary final users of the products developed in
compliance to the standards are pilots, airlines and ANSPs personnel in
ATS units and aerodromes.
Similar work done by
other standard-making
organizations
Similar work has been performed by AEEC (tbc) for other
communication categories, typically for AOC and APC. However
requirements in terms of mobility, service continuity are not the same
so, although similar, the conclusions of their work are not necessarily
applicable and useful for ATSC communications.
Expected form/size of
the result
The result of this development will comprise:
 SARPs: amendments to and additional requirements in Annex
10 Volume III (maximum a few pages);
 technical provisions: amendments to and additional
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
Expected delivery date
ACP-WGW01/TD-04
requirements in Document 9705 (volume unknown yet,
depending on the outcome of task c) ). If it is decided to
develop a new Manual for communications in the IPS
environment (see Task b), then these technical provisions
should be included in this new Manual;
guidance material: to be included in Document 9739 (volume
unknown yet).
To be determined based on the outcome of task c).
ACP-WGW01/TD-04
Title of task
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e) assess requirements for incorporation of new features like multicast and
encryption and develop and validate appropriate technical provisions as
necessary;
Objectives
This task is in fact composed of two subtasks, the first one aiming at
evaluating and monitoring emerging operational requirements for
multicast and encryption, and the second consisting in the development
of technical provisions for such features. Multicast may be useful to
some new applications, encryption depends on the requirement for
confidentiality. Depending also upon the target date and the
environment in which these features are going to be used (if used), the
provisions may be developed in the current ATN OSI environment, or
they may be directly integrated in technical provisions for use of IPS
(see tasks b, c and d).
Where the need has
been identified
This task has been a background task for WGN since at least ATNP3,
or even at an earlier stage. However, a firm requirement for these
features has not clearly emerged yet.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
Multicast is a technical feature in support of certain types of
applications. The application supported by multicast (unknown at
present) may be important to safety etc. but multicast in itself has no
direct relationship to such high level objectives. Encryption is directly
linked to confidentiality, which, if mandated, contributes to security
and efficiency (for AOC) of international civil aviation.
Primary user(s) of the
result
These topics being technical features, they primarily benefit to
developers of higher level applications. Ultimately encryption is going
to be used by pilots, airlines and ANSP staff in ATS units and
aerodromes.
Similar work done by
other standard-making
organizations
Not identified at this stage in the context of CNS/ATM applications.
Expected form/size of
the result
The result of the background task of assessing and monitoring of
emerging requirements will be used internally to the ACP. It should be
composed of a report or working paper to a panel or WGW meeting
(assumed to be 10 to 20 pages, or shorter in case of no requirements).
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ACP-WGW01/TD-04
If the development of technical provisions is performed, the result will
comprise:
 SARPs: a few additional requirements in Annex 10 Volume III
(maximum a few paragraphs);
 technical provisions: amendments to and additional
requirements in Document 9705 (presumably a few tens of
pages);
 guidance material: to be included in Document 9739 (volume
unknown yet).
Expected delivery date
As part of the monitoring process, the background task will be reported
upon at each WGN meeting. Starting from T1 (identification of firm
requirements) the development process of technical provisions should
take 3 WGN meetings.
ACP-WGW01/TD-04
Title of task
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f) monitor the development of new operational requirements and of new
fixed or mobile sub-networks and develop appropriate technical
provisions;
Objectives
In line with the general design of communication systems, aeronautical
communications are addressed by ICAO according to a layered
approach: operational requirements are met by applications, which
make use of upper layers and internetworking. The inter-network itself
makes use of fixed and/or mobile sub-networks. Operational
requirements evolve mostly depending upon their level of formal
standardization, as it has been done by the ADSP and the OPLINKP,
and as they may evolve in the future by other bodies. At the other end,
sub-networks evolution is based on capacity requirements,
technological progress and regulatory constraints (frequency
management). The work of WGN therefore interfaces both with
operational requirements (at the "top") and with sub-networks (at the
"bottom"). It is necessary to ensure consistency between these three
aspects in order for aeronautical communications to deliver their
benefits. This task aims at this goal of ensuring consistency. Like task
e) above, it is composed of two sub-tasks, the first one aiming at
monitoring emerging new operational requirements and new subnetworks, and the second consisting in the development of technical
provisions for new applications and new SNDCFs, respectively. It
should be noted that in the IPS environment, SNDCFs (or their IP
equivalent) might be based on existing standards, provided that they
are mature. This will be at least applicable to fixed sub-networks.
Where the need has
been identified
Since the inception of the ATN, either this task has been present in the
working groups' work programme or the way of working has been
implicitly aligned on this method (e.g. addition of D-METAR, frame
mode SNDCF, IP SNDCF).
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
The technical provisions envisaged here are generic. At least for
applications, they are likely to contribute to high level objectives such
as safety, efficiency, regularity and security, but this cannot be
identified at this stage, it depends on the application. More generally, it
is as usual the provision of an overall system delivering an operational
service, and made of three main blocks: applications, upper layers and
internetworking, and sub-networks, which is important to these
objectives.
Primary user(s) of the
In the first instance, primary users of the developed standards are
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ACP-WGW01/TD-04
result
implementers of CNS/ATM communication products, including
avionics vendors. Primary final users of the products developed in
compliance to the standards are pilots, airlines and ANSP personnel in
ATS units and aerodromes.
Similar work done by
other standard-making
organizations
Not identified at this stage in the context of CNS/ATM applications.
Expected form/size of
the result
The result of the background task of assessing and monitoring of
emerging requirements will be used internally to the ACP. It should be
composed of a report or working paper to a panel or WGW meeting
(assumed to be 10 to 20 pages).
The result of the development cannot be evaluated in terms of size,
because of the generic nature of the task. It is foreseen that the form
would be:
 SARPs: amendments and additional requirements in Annex 10
Volume III (probably 10 pages maximum, given the high level
nature of the material in SARPs);
 technical provisions: amendments to and additional
requirements in Document 9705 (volume unknown) or
chapters in the new Manual, since the considered provisions
are clearly related to future applications;
 guidance material: form and volume unknown yet.
Expected delivery date
This depends on the extent of the new requirements, and on the date at
which they will appear. Thus it cannot be determined at this stage.
Typically the development of a new SNDCF required in the past 4 to 5
WG meetings. However, since for the adaptation of new sub-networks,
it is intended to use mature existing standards to the largest possible
extent, this could considerably reduce the time to deliver.
ACP-WGW01/TD-04
Title of task
Objectives
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g) monitor the evolution of ground-ground and air-ground voice
communications, and develop SARPs and/or technical provisions in this
area, as necessary;
The objective of this task is similar to that of the task above, but for
voice communications. In the short term, the situation is somewhat
different because work is being performed by EUROCAE WG-67 (see
“similar work” below).
The main focus of known current work is related to the study of voice
over IP (VoIP) in the ground-ground environment (mainly between
VCS). The study of ATSC use of air-ground VoIP is not likely to
appear before some years, given the issues about the use of IPS in airground (see task c) that need to be studied in the first instance.
Where the need has
been identified
It was agreed at the AMCP/8 meeting that voice networking should be
considered by WGN.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
The potential use of VoIP in aeronautical ground-ground
communications should enhance their overall efficiency, including
from an economical perspective. As usual when protocols of the
Internet Protocol Suite (IPS) are being considered, security should be
subject to special care.
Primary user(s) of the
result
In the first instance, primary users of the developed standards are
implementers of voice communication products (mainly VCSs).
Primary final users of the products developed in compliance to the
standards are ANSP personnel in ATS units and aerodromes.
Similar work done by
other standard-making
organizations
Significant work is being done in this area by EUROCAE WG-67. The
intention is to use this material to the largest possible extent.
Expected form/size of
the result
The EUROCAE WG-67 deliverables will be used as base material,
with a minimal set of amendments so as to comply with ICAO
formalism.
When adopted by the ACP, the outcome of this work should be:
 SARPs: additional requirements in Annex 10 Volume III
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

Expected delivery date
ACP-WGW01/TD-04
(probably 10 pages maximum, given the high level nature of
the material in SARPs);
technical provisions: a new Manual of technical provisions is
likely to be required as the ICAO format of this material
(volume unknown at this stage, to be discussed with WG-67
participants);
guidance material: form and volume unknown yet.
To be discussed with WG-67 participants. After delivery/publication
by EUROCAE (T2), a minimum of 2 WGN meetings is required (to
perform the adaptation to the ICAO format). If more material is to be
developed by WGN, then this may take longer.
ACP-WGW01/TD-04
Title of task
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h) enhance current applications, including the development of technical
provisions for PM-ADS and PM-FIS, and the update of CPDLC and
AIDC in accordance with the conclusions of the OPLINKP/1 meeting;
Objectives
This task is similar to Task f) above, with the difference that it consists
of enhancing existing applications rather than developing new ones.
The accurate requirements have been already identified for the
following applications:
 enhancements to CPDLC and PM-CPDLC based on the
outcome of the forthcoming OPLINKP/1 meeting,
 development of PM-ADS and PM-FIS to meet the safety and
security requirements identified by safety cases,
 development of AIDC Version 2 based on the outcome of the
forthcoming OPLINKP/1 meeting.
Where the need has
been identified
For the applications listed above, the need either comes from the
OPLINK Panel or results from safety cases developed by RTCA DO290/EUROCAE ED-120.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
PM-ADS and PM-FIS will enhance safety and security, in comparison
to the current provisions for ADS and FIS. The CPDLC update and
AIDC Version 2 are likely to contribute, to various extents, to the
enhancements of all these high level objectives. The accurate benefit
may be determined from a detailed analysis of the changes specified by
the OPLINK Panel.
Primary user(s) of the
result
In the first instance, primary users of the developed standards are
implementers of CNS/ATM communication products, including
avionics vendors. Primary final users of the products developed in
compliance to the standards are pilots, airlines and ANSPs personnel in
ATS units and aerodromes. AIDC will be used by controllers in ATS
units.
Similar work done by
other standard-making
organizations
No standardization work is performed by any other standard-making
organization in this area.
Expected form/size of
the result
The result of this task will comprise:
 SARPs: a few amendments and additional requirements in
Annex 10 Volume III (maximum a few paragraphs affected for
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
ACP-WGW01/TD-04
each application);
technical provisions - amendments to and additional chapters
in Document 9705 Sub-Volumes II and III:
i.CPDLC: a few tens of pages,
ii.PM-ADS: around 180 additional pages, among which
50 new pages or with significant amendments to
existing material;
iii.PM-FIS: around 130 additional pages, among which
40 new pages or with significant amendments to
existing material;

Expected delivery date
iv.AIDC version 2: either 150 additional pages (if taking
the form of a new application), or amendments to 2550 pages to the existing Sub-Volume III.
guidance material: to be included in Document 9739 (volume
unknown yet).
SARPs and technical provisions: T0 + 3 or 4 WGN meetings
Guidance Material: T0 + 4 or 5 WGN meetings
ACP-WGW01/TD-04
Title of task
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i) enhance technical provisions for system management, directory and
security services;
Objectives
The technical provisions for system management and directory services
are all based on ISO standards, namely CMISE/CMIP for systems
management and X.500 DAP/DSP for directory. There are no known
implementations of ATN systems management, because CMISE/CMIP
is excessively complex and has been superseded by SNMP. There is
some reluctance by ANSPs to the implementation of X.500 DAP/DSP,
for the same reasons and potential alternative use of LDAP;
furthermore directory replication/ shadowing is not addressed in the
current provisions. ATN security services are also considered as
excessively complex and WGN has started the study of a simpler
security architecture, based on the existing mechanisms. In summary,
there is a need to reconsider these topics, at least to enhance them in
relation with the evolution towards the IPS environment, and also with
a goal of simplification. Again, mature existing– and widely
implemented – standards will be used to the largest possible extent.
Where the need has
been identified
The need for enhancements results partly from the evolution towards
the IPS environment, which has been a WGN work item since the
AMCP/8 meeting, and from work already undertaken by WGN – but
not completed – before the ACP WGW/1, based on a work item in its
list of tasks.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
Systems management generally contribute to efficiency of technical
systems. Directory is considered of importance to the smooth transition
from AFTN/CIDIN to AMHS. Enhancements to security will directly
benefit to the overall security of international civil aviation.
Primary user(s) of the
result
In the first instance, primary users of the developed standards are
implementers of CNS/ATM air-ground and ground-ground
communication products. Primary final users of the products developed
in compliance to the standards are technical operation staff for systems
managements, AMHS and application end users (pilots, airlines and
ANSPs personnel in ATS units and aerodromes) for directory and
security.
Similar work done by
other standard-making
Work aiming at profiling existing standards may be performed by
Regional Groups or bodies (typically Eurocontrol or the European
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organizations
Expected form/size of
the result
Expected delivery date
ACP-WGW01/TD-04
Commission). Consistency with the work of such bodies will be
sought.
The result of this task will comprise:
 SARPs: possibly a few amendments in Annex 10 Volume III
(maximum a few paragraphs affected for each application);
 amendments to Document 9705 (overall expected between 30
and 60 pages), or possible inclusion of specific chapters in the
new Manual of communications in the IPS environment;
 guidance material: updates to be included in Document 9739
(volume unknown yet).
T0 + 2 to 5 WGN meetings depending on the subjects, orientation
given and resources available (in the past limited resources only have
been allocated to this type of subject)
ACP-WGW01/TD-04
Title of task
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j) participate, in co-ordination with WGM and through the activities of
AMSG (a joint subgroup of WGM and WGN), to the maintenance of
existing ATN SARPs, technical provisions and guidance material;
Objectives
The ICAO documentation includes three main documents regarding
ATN: Annex 10, Volume III, Part I, Chapter 3 (also called "ATN Core
SARPs"), Document 9705 and Document 9739. These documents have
reached a high level of maturity and stability thanks to validation and
implementation activities. However, defects may still be identified, as
for any specification. A potential defect is reported by the community
by means of a "PDR" (potential defect report). The goal of this task is
to ensure that PDRs are properly addressed, confirmed as defects
(status ACCEPTED), and through that defect corrections are defined in
accordance with well-established procedures so that implementers can
participate and/or be informed of the required changes. Within ACP,
WGM is formally tasked with Maintenance activities, and at the same
time the required expertise to analyse and correct defects resides within
WGN. To minimize travels and expenses, this task is currently
performed by the AMSG (ATN Maintenance Sub-Group), which has
been created as a joint subgroup of WGM and WGN.
Where the need has
been identified
This need exists for any set of standards. Formal maintenance and
change control for ATN documentation was started at ATNP/2 in 1996,
in relation with the publication of the first Edition of ICAO Doc 9705.
It was performed by the ATNP CCB (Configuration Control Board)
until the joint WGM/WGN meeting (Nov. 2003) which followed the
ACP WGN02 meeting, and where the AMSG was created.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
The existence of strict maintenance procedures highly contributes to
safety of aeronautical communications and thus of international civil
aviation, because it provides a means to control changes and to inform
implementers in case of critical deficiencies being identified.
Primary user(s) of the
result
The users of the outcome of the maintenance task are implementers of
products conforming to ATN SARPs and technical provisions.
Similar work done by
other standard-making
organizations
There is no other body performing this task for ATN documentation.
Experts or other bodies identifying defects in ATN documentation are
invited to participate in maintenance activities through the AMSG
procedures.
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Expected form/size of
the result
ACP-WGW01/TD-04
In the context of the existing procedures, the result of maintenance
activities is a set of resolved PDRs, each including an amendment
applicable to the document identified in defect. Each PDR consists of a
filled form, from one to a few pages.
Because of the efficiency of the PDR mechanism and procedures, in
particular for discussion and dissemination of agreed changes, it has
sometimes been used for enhancements to Doc 9705, rather than
exclusively for maintenance. In such a case, a larger amendment to
technical provisions is generally attached to the PDR form.
Expected delivery date
It is generally expected that a PDR be resolved within one or two
WGN meetings from its submission. For various reasons, some PDRs
(including those that are more related to enhancements than to true
defects) take sometimes longer before being resolved.
ACP-WGW01/TD-04
Title of task
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k) study the institutional implication of aeronautical internetworking
Objectives
The goal of this task is to identify, and to study when this is feasible,
institutional issues which may arise in relation with aeronautical
internetworking. An example of this is the need for sunset dates for
non-secure A/G applications.
Where the need has
been identified
This task has been in the work programme of ATNP from its creation,
as a background activity, before being included in the work programme
of WGN.
The extent of
importance to safety,
efficiency, regularity
and security of
international civil
aviation
The relationship between institutional issues and high level ICAO
objectives such as safety, efficiency, regularity and security of
international civil aviation depends on the issue itself and cannot be
addressed in general terms.
Primary user(s) of the
result
Primary users of this work should be the Air Navigation Commission
as a focal point, on the one hand, and ANSP authorities on the other
hand. Part of this work, when available, may also be used on a regional
basis e.g. by ICAO PIRGs.
Similar work done by
other standard-making
organizations
Expected form/size of
the result
The outcome of this task generally takes the form of reports to the
A.N.C, as was delivered at ATNP/2, or of communiqués to other
bodies as appropriates.
Expected delivery date
This task being a permanent background task, it is difficult to indicate
an expected delivery date.
- 23 -
ANC Task No
(AMCP/8)
AMCP/8 Work Programme Item
CNS-7001
CNS-9102
CNS-9403
CNS-9603
CNS-9902
1) Conduct the necessary studies for the
development and standardization of
communication systems in support of current
and future aeronautical safety and security
applications.
ACP-WGW01/TD-04
Estimated Completion
Date
WGN Tasks
(AMCP/8 target = 2007)
2007
Tasks
b, c
depending upon task c
Task d,
depending
upon task c
This task includes:
CNS-9102
CNS-9403
CNS-9603
—
draft SARPs and guidance material for
the UAT;
—
new ATN SARPs and technical
provisions; and
—
investigation of the feasibility to
introduce new AMSS technologies.
2) Assess requirements for the enhancement
of existing provisions in the light of evolving
technical and operational requirements while
maintaining liaison with other panels.
This task includes:
—
CNS-7001
CNS-7402
CNS-8702
CNS-9403
CNS-9901
(AMCP/8 target = 2004)
Ongoing
Tasks e, f, g
2006-2007
Tasks h, i
Ongoing
Task j
Ongoing
Task k
enhancements to ATN, air/ground
digital or data links, air-ground and
ground-ground voice communication
links.
3) Monitor actual implementation of
communication systems in order to provide
expert advice as necessary to maintain the
relevancy and currency of SARPs, detailed
technical specifications and guidance material.
This task includes:
—
CNS-9403
current provisions for HFDL, VDL
Mode 2, VDL Mode 3, VDL Mode 4,
VHF DSB-AM voice, AFS, voice
switching signaling and ATN.
4) Identify as required, elements, operations
or functions that will have institutional
implications in the provision of
communication services.
- 24 -
ACP-WGW01/TD-04
CNS-7002
5) Develop material relevant to the protection
of aeronautical electromagnetic spectrum
from interference and incursion by nonaeronautical interests.
Ongoing
not relevant o
WGN
2004
not relevant o
WGN
This task includes:
CNS-02xx
—
ICAO position for ITU World
Radiocommunication Conference 2007;
—
material for submission to relevant
ITU-R study groups; and
—
material on interference from nonaeronautical sources
6) Investigate technical issues related to the
downlinking of duress and audio/video signals
from aircraft in emergency situations over
existing or new digital links and develop
proposals for further work, as required.