ACP – WGN05-WP25

ACP – WG N/SG N3-WP/3-3 Rev.a

16/May/2005

AERONAUTICAL COMMUNICATIONS PANEL (ACP)

Working Group N – Networking

Montreal, 12th– 13th May 2005 (third meeting)

Agenda Item 6 : Ground-Ground Applications

INTRODUCTION OF STANDARDISED ADDRESSES FOR AMHS TESTING (Rev. a)

Prepared by Klauspeter Hauf – Revision a by SGN3-3 meeting
(Presented on behalf of the FIRST Team)

Summary

This document aims at proposing an AFTN/AMHS Address Space dedicated for testing

INTRODUCTION OF STANDARDISED ADDRESSES FOR AMHS TESTING (Rev. a) ACP WGN05 (Montréal, 11th- 20th May 2005)

Introduction

In the course of interoperability testing between the AMHS Implementations of the FIRST member States/Organisations a number of special AMHS user addresses were agreed to ensure that:

a) the tests could be performed in a coordinated and transparent manner; and

b) the user address semantics allows to identify the characteristics of the originators/recipients of test messages, reports and probes.

The tests were successfully performed in a framework of agreed test scenarios and test cases, however, a number of tests had to be suspended due to certain technical constraints.

In a follow up action of DFS an AMHS test tool was developed, in particular, to make up those tests which could not be performed by interconnected real systems due to the fact that their system software do not allow the intentional generation certain types of failures.

The test tool interfaces the Implementation under Test (IUT) and verifies the correctness of the IUT by observing the reactions of the IUT upon defined inputs from the test tool. To simulate selected test scenarios and test cases of the interoperability tests a similar set of user addresses was used as before agreed between the FIRST partners.

The WP proposes a common set of user addresses which is reserved for AMHS test purposes. The agreement of special test addresses would allow to identify immediately test addresses in an operational environment if they are used unintentionally. A further advantage would be that different test tools could be used for the verification of AMHS implementations without any modifications of the addresses used in test data. The test addresses could be configured in each IUT/SUT and all AMHS implementations could be verified under the same conditions (Conformance Testing).

Discussion

Functional areas of testing

Two categories of tests for a combined AFTN/AMHS environment have to be taken into account:

1. Tests relating to communications between direct AMHS users (AMHS native communications); and

2. Tests relating to intercommunications AFTN/AMHS (AFTN/AMHS Gateway communications).

Address space for testing

To meet the above stated scope of testing the test-address space used by the test tool should include AMHS addresses placed in different AMHS PRMDs and AFTN addresses located in different countries.

In the minimum, there is a need of three generic PRMDs and three generic AFTN countries which may be called: AMHSLAND-1, AMHSLAND-2, AMHSLAND-3, AFTNLAND-1, AFTNLAND-2 and AFTNLAND-3. If required an extension of the address space should follow the same principles.

This allows to cover all cases of selected addressing schemes, including:

v  CAAS with one single organisation-name value for all location indicators within the PRMD,

v  CAAS with multiple organisation-name values for different sets of location indicators within the PRMD,

v  XF.

The user addresses of AMHSLAND-1 (Addressing scheme: CAAS – single "O" value)

C = XX

ADMD = ICAO

PRMD = AMHSLAND-1

O = AA-REGION / OU1 = AAAA / -> CN = AAAAMHAA till AAAAMHAZ
and
CN = AAAAMHBA till AAAAMHBZ

The user addresses of AMHSLAND-2 (Addressing scheme: CAAS – multiple "O" value)

C = XX

ADMD = ICAO

PRMD = AMHSLAND-2

O = AB-REGION1 / OU1 = ABAA / -> CN = ABAAMHAA till ABAAMHAZ
O = AB-REGION1 / OU1 = ABAB / -> CN = ABABMHAA till ABABMHAZ
O = AB-REGION2 / OU1 = ABBA / -> CN = ABBAMHAA till ABBAMHAZ
O = AB-REGION2 / OU1 = ABBB / -> CN = ABBBMHAA till ABBBMHAZ
O = AB-REGION3 / OU1 = ABCA / -> CN = ABCAMHAA till ABCAMHAZ
O = AB-REGION3 / OU1 = ABCB / -> CN = ABCBMHAA till ABCBMHAZ

Table 1: AMHSLAND-2

The user addresses of AMHSLAND-3 (Addressing scheme: XF)

C = XX

ADMD = ICAO

PRMD = AMHSLAND-3

O = AFTN / OU1 = ACCCMHAA till ACCCMHAZ and
OU1 = ACCCMHBA till ACCCMHBZ

The user addresses of AFTNLAND-1 (Addressing scheme: CAAS – single "O" value)

C = XX

ADMD = ICAO

PRMD = AFTNLAND-1

O = BA-REGION / OU1 = BAAA / -> CN = BAAAFTAA till BAAAFTAZ
and
CN = BAAAFTBA till BAAAFTBZ

The user addresses of AFTNLAND-2 (Addressing scheme: CAAS – multiple "O" value)

C = XX

ADMD = ICAO

PRMD = AFTNLAND-2

O = BB-REGION1 / OU1 = BBAA / -> CN = BBAAFTAA till BBAAFTAZ
O = BB-REGION1 / OU1 = BBAB / -> CN = BBABFTAA till BBABFTAZ
O = BB-REGION2 / OU1 = BBBA / -> CN = BBBAFTAA till BBBAFTAZ
O = BB-REGION2 / OU1 = BBBB / -> CN = BBBBFTAA till BBBBFTAZ
O = BB-REGION3 / OU1 = BBCA / -> CN = BBCAFTAA till BBCAFTAZ
O = BB-REGION3 / OU1 = BBCB / -> CN = BBCBFTAA till BBCBFTZ

Table 2: AFTNLAND-2

The user addresses of AFTNLAND-3 (Addressing scheme: XF)

C = XX

ADMD = ICAO

PRMD = AFTNLAND-3

O = AFTN / OU1 = BCAAFTAA till BCAAFTAZ and
OU1 = BCAAFTBA till BCAAFTBZ

Figure 1: Addressing Plan

For the IUT itself as test addresses could be used alternatively:

The original, operational AMHS and AFTN addresses assigned to the COM Centre or a generic address space taken from the fictitious PRMD/AFTN country IUTLAND including the generic user addresses IUTAFTAA and IUTAMHAA (or a more comprehensive set of addresses in case of CAAS with multiple "O" values) which may be mapped either onto the CAAS (preferred) or XF addressing scheme. The following table shows the generic address space assigned to the IUT.

CAAS (preferred) – single "O" / CAAS (preferred) – multiple "O" / XF
C = XX
ADMD = ICAO
PRMD = IUTLAND
O = IUT-REGION
OU1 = IUTA
CN = IUTAFTAA
IUTAMHAA / C = XX
ADMD = ICAO
PRMD = IUTLAND
O = IUT-REGION1 OU1 = IUTA
CN = IUTAFTAA
IUTAMHAA
O = IUT-REGION2 OU1 = IUTB
CN = IUTBFTAA
IUTBMHAA
O = IUT-REGION3 OU1 = IUTC
CN = IUTCFTAA
IUTCMHAA / C = XX
ADMD = ICAO
PRMD = IUTLAND
O = AFTN
OU1 = IUTAFTAA
IUTAMHAA

Table 3: Generic address spaces of the IUT

International allocation and publication of the address space for testing

Aiming at the international publication of test addresses the following entries in the PRMD tables are proposed:

State / AMHS Address Specification
Nationality Letters / Name / Country name / ADMD name / PRMD name / Address scheme / Organisation name / Remark
AA / AMHSLAND-1 / XX / ICAO / AMHSLAND-1 / CAAS / AA-REGION / 1)
AB / AMHSLAND-2 / XX / ICAO / AMHSLAND-2 / CAAS / see Table 1: AMHSLAND-2 / 1)
AC / AMHSLAND-3 / XX / ICAO / AMHSLAND-3 / XF / 1)
AG / Solomon Islands / XX / ICAO / AG / XF
AN / Nauru / XX / ICAO / AN / XF
AY / Papua New Guinea / XX / ICAO / AY / XF
BA / AFTNLAND-1 / XX / ICAO / AFTNLAND-1 / CAAS / BA-REGION / 1)
BB / AFTNLAND-2 / XX / ICAO / AFTNLAND-2 / CAAS / see Table 2: AFTNLAND-2 / 1)
BC / AFTNLAND-3 / XX / ICAO / AFTNLAND-3 / XF / 1)
BG / Greenland (Denmark) / XX / ICAO / BG / XF
BI / Iceland / XX / ICAO / BI / XF

1) Use for test purposes only

Table 4: Entries of the generic test address space

Action by the Meeting

The Meeting is invited to consider and comment the proposal of a common address space reserved for test purposes.

In addition, the Meeting is invited to take appropriate actions for publication of an agreed test-address space.

– END –

WG N/SG N3-WP/3-3 Rev.a page 1 15/05/05