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ACP-WGM20/WP-qq
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International Civil Aviation Organization
WORKING PAPER / ACP-WGM20/WP-qq
23 January 2013

AERONAUTICAL COMMUNICATIONS PANEL (ACP)

20th MEETING OF WORKING GROUP M (Maintenance)

Montréal, Canada, 23-25 January 2013

Agenda Item 3: / ATN/OSI Document 9880 Update Status

AMHS – Completion Process for Doc 9880 Part II Edition 2

(Prepared by Jean-Marc Vacher, France)

SUMMARY
At ACP WG-M/16, France was tasked with the consolidation of a draft Edition 2 for Doc 9880 Part II (AMHS), taking into account the various Amendment Proposals submitted with regards to this part of the Manual.
This paper aims at defining a completion process, within WG-M, to ensure that all relevant work items are taken into account while preparing this Draft Edition 2.
The paper includes:
  • a summary of identified APs, and related work in progress,
  • a list of detailed changes needed as a follow-up to the publication of Doc 9880/AN-466 Part II Edition 1,
  • an editorial amendment aiming primarily at the removal of obsolete clauses from the document, which were identified during the detailed review of Edition 1.

ACTION
The working group is invited to comment the proposed approach, and to confirm that the proposed work should be performed in preparation for the draft Edition 2 of Doc 9880/AN-466 Part II.

1. INTRODUCTION

1.1 At ACP WG-M/16, Action 16-06 was agreed, to task Jean-Marc Vacher (France) with the consolidation of a draft Edition 2 for Doc 9880 Part II (AMHS), taking into account the various Amendment Proposals submitted with regards to this part of the Manual.

1.2 This paper aims at defining a completion process, within WG-M, to ensure that all relevant work items are taken into account while preparing this Draft Edition 2.

2. REFERENCES

[1]ICAO Document 9880 AN/466 Part II Edition 1 – Ground-ground communications – Air Traffic Services Message Handling Services (ATSMHS)

[2]ICAO Document 9880 AN/466 Part IIB Unedited Advance Version – Ground-ground communications – ATS message handling service (ATSMHS)

[3]Working papers referenced in Table 1 below.

3. DISCUSSION

3.1 Amendment Proposals

3.1.1 Several Amendment Proposals for Doc 9880 Part II have been submitted to WG-M, as listed in the table below:

Table 1 – list of APs already addressed by WG-M

Source / Title / WG-M Status
WP07 WG-M/16 / EITs and Probe handling in AFTN/AMHS Gateway / APPROVED
WP09 WG-M/19 / Update of the technical specification (Doc 9880) due to enhanced operational requirements requested by the aeronautical applications AIS/AIM (ANNEX 15), MET (ANNEX 3) and PANS ATM (Doc 4444) / APPROVED
WG-M/20 / AFTN Service message processing in AFTN/AMHS Gateway / PROPOSED
WP11 WG-M/19, WP08 WG-M/20 / Registration in support of AMHS use of FTBP
Clarification of FTBP Usage / WORK IN PROGRESS

3.1.2 It is proposed to include the changes proposed in these APs in the draft Edition 2. The last item will be taken into account depending on the level of progress of WG-M regarding this detailed topic.

3.2 Changes needed as a follow-up to publication of Edition 1 of Doc 9880/AN-466 Part II

3.2.1 It appears that the Document 9880 AN/466 Part II version which is officially published by ICAO includes some editorial and paragraph numbering differences with the “advance Edition (unedited)” upon which the EUR AMHS Manual is primarily based. A detailed review has been performed, resulting in:

  • A comprehensive identification of differences between the “advance Edition (unedited)” and the published Edition 1, which is provided for information as Appendix A to this paper. This information could be useful for ICAO Regions and States, for example when references are made in regional documents or manuals to Doc 9880. This identification includes an analysis of the impact for each difference;
  • The observation that a relatively small number of mistakes were performed while editing the document. Most of these mistakes are considered editorial (for example, incorrect or missing update of cross-references internal to the document), however some changes also modified the meaning of the previous text. In such cases it is important that the initial meaning of the material should be restored, not to alter in an uncontrolled manner practices related to AMHS, which is currently in operation or being deployed on a worldwide basis.
  • The table below provides the details of the changes which need to be performed to correct these mistakes.

Table 2 – list of changes needed following publication of Edition 1

section number in advance Edition (unedited) / section number in published Edition 1 / Comment
(was un-numbered) / 2.4.1.2 / Numbering and editorial changes. The clause must be renumbered "2.4.2.1".
2.5.1.2.1 / Un-numbered text below 2.5.1.2 / Editorial changes and merging with former clause 2.5.1.2.1. The requirement that an AMHS user address shall comply with the scheme selected by the AMHS MD is missing and must be re-inserted. The phrase ", and in compliance with its declared addressing scheme" must be inserted in item b) after "within the AMHS management domain".
2.5.1.3.4 / 2.5.1.3.4 / Intention of clause modified. The clause must mean that pair of characters representing nationality letters cannot be used as a private-domain-name, except by one of the States designated by the nationality letters. It is proposed to restore a wording similar to the advance edition: "[...] private domain-name values corresponding to ICAO nationality letters specified in Doc 7910 shall be reserved for potential use by an AMHS management domain operating in the State, or in one of the States, identified by the nationality letters."
Un-numbered text below 2.5.1.4.2 / 2.5.1.4.9 / Multiple editorial changes in a). Replace "order of preference from 1) to 4)" with "order of preference from 1) to 3)". The notion that in some cases a State can be identified by four letters is no longer present, and must be re-introduced. The following wording is proposed for a) 2): "four-letters identifying a location as specified in Doc 7910 (characters 1 to 4 of the AF-address), and identifying a state if there is one single location in the state;"
2.5.1.4.3.1 / 2.5.1.4.10 / Multiple editorial changes in a). Replace "order of preference from 1) to 4)" with "order of preference from 1) to 3)". The notion that in some cases a State can be identified by four letters is no longer present, and must be re-introduced. The following wording is proposed for a) 2): "four-letters identifying a location as specified in Doc 7910 (characters 1 to 4 of the AF-address), and identifying a state if there is one single location in the state;"
2.5.1.4.3.1.1 / 2.5.1.4.11 / Due to renumbering, the scope of the clause is slightly ambiguous. The clause should be reworded as follows: "No distinction is made between upper case case and lower case in an MF-address complying with CAAS."
(did not exist) / 3.5.1 / Structure change: insertion of a level-3 title but with wrong numbering: "3.5.1" must be replaced with "3.2.5".
Table 3-4 / Table 3-4 / An error was made when updating cross-references. All cross-references in column "value", except row 1 ("ATS-Message-header"), should be aligned on those in column "IA-5 encoding".
4.3.1.3 / 104.3.1.3 / There is a typo in the clause number. Replace "104.3.1.3" with "4.3.1.3"
4.3.2.2.1 / 4.3.2.2.1 / Editorial changes in a) 2). The notion that in some cases a State can be identified by four letters is no longer present, and must be re-introduced. The following wording is proposed for a) 2): "four-letters identifying a location as specified in Doc 7910 (characters 1 to 4 of the AF-address), and identifying a state if there is one single location in the state;"
4.3.2.2.2 / 4.3.2.2.3 / Numbering and editorial changes. But "set of attributes in 4.3.2.2.1 a)" is inappropriate and potentially confusing. It should be replaced with "character string in 4.3.2.2.1 a)"
Table 4-2 / Table 4-2 / Due to renumbering, the Table is no longer linked to 4.4.2.1.2. It should be moved above 4.4.2.1.3, which has no relation to the Table.
4.5.2.1.5.1 / 4.5.2.1.5.1 / Clause has been removed and must be restored
4.5.2.1.5.2 / 4.5.2.1.5.2 / Clause has been removed and must be restored
4.5.2.1.6 / 4.5.2.1.6 / Text of clause severely altered: main text and text items a) and b) are wrong. Text is ok starting from b) 1)
4.5.2.1.7 / 4.5.2.1.7 / Wrong reference introduced in b) 2): "4.5.6" must be replaced with "4.5.2.1.8"
4.5.2.2.6.1 / 4.5.2.2.6 / Numbering change. Wrong reference introduced in b) : "2.5.1.4.3" must be replaced with "2.5.1.4.10 to 2.5.1.4.12"
4.5.2.2.9.1 / 4.5.2.2.12 / Numbering change. Wrong reference in clause : "4.5.2.2.10 a)" must be replaced with "4.5.2.2.11 a)"
Table 4-9 / Table 4-9 / Table moved. Also wrong reference update in Part 5/1.2.1 "rn", column "mapping": "4.5.2.3.6" must be replaced with "4.5.2.3.5"
4.5.2.3.2.2 / 4.5.2.3.3 / Due to renumbering and moving of table, the clause is no longer understandable in isolation and should be replaced with the following text: "All body part types other than basic "ia5-text", extended "ia5-text-body-part" and extended "general-text-body-part" are excluded as the result of 4.5.2.1.4."

3.2.2 It is proposed to include the changes proposed in Table 2 in the draft Edition 2.

3.3 Additional amendment proposals

3.3.1 While performing the detailed review mentioned above, a small number of required changes were identified, which were already needed in the advance Edition of Part IIB (unedited), for the following reasons:

  • obsolete material (e.g. references to ATN Systems Management);
  • material which was already incorrect in the advance edition.
  1. The corresponding proposed changes are listed in Table 3, they are proposed for inclusion in Draft Edition 2.

Table 3 – Additional amendment proposals

section number in advance Edition (unedited) / section number in published Edition 1 / Comment
2.2.4.1 / 2.2.4.1 / This clause is no longer valid due to Doc 9705 Sub-Volume VI being phased out. It should be replaced with the following text, derived from 2.2.4.2: "The scope of this manual for AMHS management is limited to the logging provisions which are defined for the ATS message user agent, the ATS message server and the AFTN/AMHS gateway. Storage, retrieval and exchange of any other management information is deemed a local issue to be addressed by the authority in charge of the system."
2.2.4.1.1 / 2.2.4.2 / Numbering and editorial changes. This clause is no longer valid due to Doc 9705 Sub-Volume VI being phased out, it should be deleted.
2.4.3 / 2.4.3 / This section is no longer valid due to Doc 9705 Sub-Volume VI being phased out, it should be deleted.
2.4.3.1 / 2.4.3.1 / This clause is no longer valid due to Doc 9705 Sub-Volume VI being phased out, it should be deleted.
2.4.3.2 / 2.4.3.2 / This clause is no longer valid due to Doc 9705 Sub-Volume VI being phased out, it should be deleted.
2.4.3.2.1 / 2.4.3.3 / Numbering and editorial changes. This clause is no longer valid due to Doc 9705 Sub-Volume VI being phased out, it should be deleted.
3.1.1.2 / 3.1.1.2 / Editorial changes. Furthermore a) includes an obsolete reference to bilaterally-defined body parts. The term "bilaterally-defined" must be replaced with "file-transfer".
3.2.2.1.1 / 3.2.2.1.2 / Numbering change. The cross-reference to "3.1.1.2" is wrong (historical) and should be replaced with "3.2.1.2".
4.4.2.3.8.1 / 4.4.2.3.8.1 / The "recipient-reassignment-prohibited", "dl-expansion-prohibited" and "conversion-with-loss-prohibited" parameter names should be in italics
4.5.1.1.2 / 4.5.1.1.2 / The contents of this clause is historical. For clarification it should be deleted.
4.5.2.1.8.1 / 4.5.2.1.9 / The "per-recipient-fields" and "originally-specified-recipient-number" parameter names should be in italics

4. ACTION BY THE MEETING

4.1 The working group is invited to:

  • comment the proposed approach,
  • confirm that the proposed work should be performed in preparation for the draft Edition 2 of Doc 9880/AN-466 Part II,
  • define a process with the Secretariat to ensure that the published Edition 2 is aligned on the change proposals above.

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