SIST EN 301 842-2 V1.7.1:2015
VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for ground-based equipment; Part 2: General description and data link layer
VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for ground-based equipment; Part 2: General description and data link layer
REN/AERO-00020-2
Radijska oprema za digitalno povezavo VHF zrak-tla, 4. način - Tehnične karakteristike in merilne metode za talno opremo - 2. del: Splošni opis in plast podatkovnih povezav
Ta dokument se uporablja za radijsko opremo naslednjih vrst:
• talne radijske oddajnike in sprejemnike za zelo visokofrekvenčno (VHF) digitalno povezavo (VDL) za komunikacije zrak-tla, 4. način, ki delujejo v pasu VHF z uporabo modulacije frekvenčnega premičnega kodiranja prek filtra Gaussian (GFSK) z razmikom 25 kHz med kanali in so zmožni uravnavati na katerem koli izmed kanalov 25 kHz od 112.000 MHz do 136.975 MHz, kot je opredeljeno v standardih in priporočenih praksah (SARP) [1] za digitalne povezave ICAO VHF (VDL).
Ta dokument vsebuje 2. del tehničnih specifikacij.
Ta dokument zagotavlja, da bo oprema, ki bo certificirana v skladu z njim, združljiva z ustreznimi standardi in priporočenimi praksami (SARP) [1] ICAO za VDL in tehničnim priročnikom ICAO za VDL4 [i.1].
Proizvajalci naj bodo pozorni, da razpon uravnavanja za talne oddajnike-sprejemnike lahko v prihodnje zajema tudi kateri koli kanal 25 kHz od 108,000 MHz do 111,975 MHz.
Področje uporabe tega dokumenta je omejeno na zemeljske postaje. Enakovredna specifikacija za letalske postaje je ETSI EN 302 842 [i.4].
Sistem VDL, 4. način, omogoča izmenjavo podatkovne komunikacije med letalskim plovilom in talnimi sistemi, ki podpirajo nadzorne in komunikacijske aplikacije. Podprti načini komunikacije vključujejo:
• radiodifuzija in komunikacija točka-točka;
• radiodifuzijske storitve, vključno z avtomatskim odvisnim nadzorom – difuzijo (ADS-B), difuzijo nadzornih podatkov (TIS-B) in difuzijo informacij za letalstvo (FIS-B);
• storitve zrak-zrak, zrak-tla, tla-zrak in talne mobilne storitve;
• delovanje brez talne infrastrukture.
Sistem VDL, 4. način, je zasnovan kot podsistem zrak/tla aeronavtičnega telekomunikacijskega omrežja (ATN) [i.2], ki uporablja pas AM(R)S in je organiziran v skladu z modelom povezanih odprtih sistemov (OSI) (določen z ISO). Sistemu ATN zagotavlja zanesljive podomrežne storitve. Podprta so lahko tudi druga omrežja, na katera pa se ta dokument ne osredotoča.
Ta dokument določa funkcionalne specifikacije za talno opremo za komunikacijo VHF, namenjeno podatkovni komunikaciji zrak-tla in zrak-zrak. Ta dokument izhaja iz naslednjih standardov in specifikacij, vključenih v:
• standarde za digitalno povezavo VDL, 4. način, ki jih je sestavila Mednarodna organizacija civilnega letalstva (ICAO) [i.1];
• druge ustrezne standarde, ki so bili določeni v točki 2.
Predvideva se, da lahko proizvajalci zagotovijo opremo, ki podpira:
• izključno radiodifuzijske storitve;
• izključno storitve točka-točka;
• radiodifuzijske storitve in storitve točka-točka.
ETSI EN 301 842-1 [3] obravnava preskuse fizične plasti. Ta dokument določa osrednje zahteve plasti povezav za zemeljske postaje VDL, 4. način, potrebne za podporo vseh vrst opreme. Te vključujejo radiodifuzijo s preprosto postavitvijo.
Ta dokument zajema preskuse plasti povezav, ki zadostujejo za podporo osrednjih funkcij plati povezav, in poleg tega vključuje tudi zahteve in preskuse, ki zadostujejo za prepoznavanje in odgovarjanje na prenose, povezane s komunikacijo točka-točka. Ta dokument se ne nanaša na zahteve za celoten komplet sporočil ADS-B ali druge aplikacije za radiodifuzijo, ki jih oprema VDL, 4. način, lahko podpira. Te so zajete v standardu ETSI EN 301 842-3 [4]. Podrobne zahteve za komunikacijo točka-točka ne spadajo v področje uporabe tega dokumenta, ampak so vključene v standard ETSI EN 301 842-4 [5]. ETSI EN 301 842-4 [5] vsebuje tudi vmesnik do
aeronavtičnega telekomunikacijskega omrežja (ATN), definiran v standardih in priporočenih praksah za ATN [i.2].
Ker so merjeni podatki zmogljivosti opreme lahko odvisni od merilnih metod, ta dokument priporoča standardne preskusne pogoje in metode.
General Information
Standards Content (Sample)
Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
EUROPEAN STANDARD
VHF air-ground Digital Link (VDL) Mode 4 radio equipment;
Technical characteristics and methods of measurement
for ground-based equipment;
Part 2: General description and data link layer
2 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
Reference
REN/AERO-00020-2
Keywords
aeronautical, digital, radio, testing, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
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If you find errors in the present document, please send your comment to one of the following services:
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Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2014.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 8
Introduction . 9
1 Scope . 10
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 12
3 Definitions and abbreviations . 13
3.1 General definitions . 13
3.2 Definition of bit order . 16
3.3 Abbreviations . 16
4 General description of VDL Mode 4 ground station link layer . 18
4.1 General . 18
4.1.1 Overview of VDL Mode 4 . 18
4.1.2 Relationship to OSI reference model . 19
4.1.3 VDL Mode 4 services . 20
4.1.4 ADS-B Function . 20
4.1.5 Operational scenarios . 21
4.1.6 VDL Mode 4 fundamentals . 21
4.1.7 Possible configuration of ground equipment . 22
4.1.8 Overall structure of specifications for VDL Mode 4 . 23
4.1.9 Equipment performance verification . 24
4.2 Ground quarantine . 25
4.3 System timing . 25
4.4 Net entry . 25
4.5 Autotune capability . 25
4.6 Autonomous and fixed access . 26
5 Minimum performance specification under standard test conditions . 26
5.1 MAC sublayer . 26
5.1.1 Services . 26
5.1.2 MAC sublayer services . 26
5.1.3 MAC sublayer parameters . 26
5.1.3.1 General . 26
5.1.3.2 Parameter M1 (number of slots per superframe) . 27
5.1.4 Time synchronization . 27
5.1.4.1 Primary . 27
5.1.4.2 Secondary . 27
5.1.4.3 Alignment to UTC second . 27
5.1.4.4 Data quality level . 27
5.1.5 Slot idle/busy notification . 28
5.1.5.1 Slot idle detection . 28
5.1.5.2 Slot busy detection . 28
5.1.5.3 Slot occupied detection . 28
5.1.5.4 Signal level indication . 28
5.1.6 Transmission processing . 28
5.1.7 Received transmission processing . 28
5.2 VSS sublayer . 29
5.2.1 Services . 29
5.2.1.1 Error detection . 29
5.2.1.2 Channel congestion . 29
5.2.2 Burst format . 29
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4 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
5.2.2.1 VSS burst structure . 29
5.2.2.2 Version number . 30
5.2.2.3 Source address . 30
5.2.2.4 Message ID . 30
5.2.2.5 Information field . 31
5.2.2.6 Reservation fields . 31
5.2.2.7 Autonomous/directed flag . 32
5.2.3 VSS sublayer parameters . 32
5.2.3.1 General . 32
5.2.3.2 Parameter VS1 (number of ground quarantined slots) . 33
5.2.3.3 Parameter VS2 (minimum CCI performance) . 33
5.2.3.4 Parameter VS4 (quarantine slot re-use range) . 33
5.2.3.5 Parameter VS5 (maximum burst length) . 34
5.2.4 VSS quality of service parameters . 34
5.2.4.1 General . 34
5.2.4.2 Parameter Q1 (priority) . 34
5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) . 35
5.2.4.4 Parameter Q3 (replace queued data) . 36
5.2.4.5 Parameter Q4 (number of available slots) . 36
5.2.5 Received transmission processing . 37
5.2.6 Reserved access protocol specification . 37
5.2.6.1 Reservation table . 37
5.2.6.2 Selecting slots for transmission or reservation . 38
5.2.6.3 Reserved transmissions . 39
5.2.6.4 Reservation conflicts . 40
5.2.7 Random access protocol specification . 41
5.2.7.1 General . 41
5.2.7.2 Random access parameters. 41
5.2.7.3 Random access procedures. 42
5.2.8 Fixed access protocol specification . 42
5.2.8.1 General . 42
5.2.8.2 Recommendation . 43
5.2.9 Null reservation protocol specification . 43
5.2.9.1 Null reservation burst format . 43
5.2.10 Periodic broadcast protocol specification . 43
5.2.10.1 Periodic broadcast reservation burst format . 43
5.2.10.2 Periodic broadcast timers . 44
5.2.10.3 Periodic broadcast parameters . 44
5.2.10.4 Periodic broadcast reception procedures . 45
5.2.10.5 Periodic broadcast transmission procedures . 46
5.2.11 Incremental broadcast protocol specification . 48
5.2.11.1 Incremental broadcast reservation burst format . 48
5.2.11.2 Incremental broadcast parameters . 49
5.2.11.3 Incremental broadcast reception procedures . 50
5.2.11.4 Incremental broadcast transmission procedures . 50
5.2.12 Combined periodic broadcast and incremental broadcast protocol specification . 50
5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst. 50
5.2.13 Big Negative Dither (BND) broadcast protocol specifications . 51
5.2.13.1 BND reservation burst format . 51
5.2.13.2 BND broadcast parameters. 51
5.2.13.3 BND broadcast reception procedures . 51
5.2.14 Unicast request protocol specification . 52
5.2.14.1 Unicast request reservation burst format . 52
5.2.14.1a Unicast request parameters. 53
5.2.14.2 Unicast request reception procedures . 53
5.2.14.3 Unicast request transmission procedures . 54
5.2.15 Information transfer request protocol specification . 54
5.2.15.1 Information transfer request reservation burst format . 54
5.2.15.2 Information transfer request reception procedures . 55
5.2.16 Directed request protocol specification. 56
5.2.16.1 Directed request reservation burst format . 56
5.2.16.2 Directed request parameters . 59
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5 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
5.2.16.3 Directed request reception procedures . 60
5.2.16.4 Directed request transmission procedures . 61
5.2.17 Block reservation protocols specification . 62
5.2.17.1 Superframe block reservation burst format . 62
5.2.17.2 Second frame block reservation burst format . 63
5.2.17.3 Superframe block reservation parameters . 64
5.2.17.4 Superframe block reservation reception procedures . 64
5.2.17.5 Second frame block reservation parameters . 65
5.2.17.6 Second frame block reservation reception procedures . 65
5.2.17.7 Superframe block reservation transmission procedures . 66
5.2.17.8 Second frame block reservation transmission procedures . 66
5.2.18 Response protocol specification . 67
5.2.18.1 Response burst format . 67
5.2.19 General request protocol specification . 67
5.2.19.1 General request burst format . 67
5.2.19.2 General request procedures . 68
5.2.20 General response protocol specification . 68
5.2.20.1 General response burst format. 68
5.2.20.2 General response procedures . 70
5.2.21 Retransmission procedures . 70
5.3 DLS sublayer . 71
5.3.1 Services . 71
5.3.1.1 General . 71
5.3.1.2 Data transfer . 71
5.3.1.3 Station address encoding . 71
5.3.1.4 DLS burst formats . 72
5.3.2 DLS system parameters . 73
5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) . 74
5.3.3 DLS procedures . 74
5.3.3.1 Broadcast . 74
5.3.3.2 DLS not supported . 74
5.3.3.3 User data packet reception . 74
5.4 Link Management Entity sublayer . 74
5.4.1 Services . 74
5.4.2 Synchronization burst format . 75
5.4.2.1 General . 75
5.4.2.2 Fixed and variable data fields. 75
5.4.2.3 Fixed data field format . 75
5.4.2.4 Variable data field format . 79
5.4.2.5 Synchronization burst request . 79
5.4.2.6 Link management burst . 79
5.4.3 Control (CTRL) parameter formats . 80
5.4.3.1 Encoding . 80
5.4.3.2 VDL Mode 4 parameter identification . 80
5.4.3.3 Ground-initiated modification parameters . 80
5.4.3.4 Ground-initiated information parameters . 83
5.4.3a LME timers and parameters . 86
5.4.3a.1 General . 86
5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter miss timer) . 87
5.4.4 LME procedures . 87
5.4.4.1 Synchronization burst procedures . 87
5.4.4.2 Peer Entity Contact Table (PECT) . 89
5.4.4.3 Network entry protocol specifications . 89
5.4.5 Additional material for ADS-B applications . 90
5.4.5.1 Information field formats . 90
5.4.5.2 ADS-B request format. 90
5.5 Additional requirements for ground stations . 91
5.5.1 System timing requirements . 91
5.5.1.1 Maintenance of Primary time . 91
5.5.2 Ground station interface requirements . 91
5.5.2.1 Ground station coordination . 91
5.5.2.2 Network timing requirements. 91
ETSI
6 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
5.5.2.3 Application interface requirements . 92
5.5.2.4 Transmission control requirements . 92
5.5.2.5 Superframe block reservation rebroadcast procedures . 92
5.5.2.6 Fixed transmission parameters . 92
5.5.2.7 Protection of fixed access protocol transmissions by ground quarantine . 93
5.5.2.8 Protection of fixed access protocol transmissions by use of appropriate reservation protocols . 93
5.5.2.9 Restriction of autotune reservations . 93
5.5.2.10 Transmission time for autotune reservations . 93
5.5.2.11 Reporting of channel usage . 94
5.6 Definitions for compact position reporting . 94
5.6.1 Introduction. 94
5.6.2 Parameter symbols, data types, constants and variables . 94
5.6.2.1 Parameter symbols . 94
5.6.2.2 Data types . 94
5.6.2.3 Constants . 94
5.6.2.4 Variables . 94
5.6.2.5 Functions . 95
5.6.2.6 Patch constants . 95
5.6.3 Fixed data field position encoding . 95
5.6.4 Fixed data field position local decoding . 95
5.6.5 Fixed data field position global decoding . 95
5.6.6 Position report processing . 95
6 General design requirements . 95
6.1 Controls and indicators . 95
6.2 Operation of controls . 95
6.3 Warm up . 95
6.4 Effects of tests . 95
6.5 Software management . 96
6.6 Recovery from failure . 96
6.6.1 Failure of the VDL equipment . 96
6.7 Monitoring of proper operation . 96
7 Protocol test procedures . 96
7.1 General . 96
7.1.1 Input voltage . 96
7.1.2 Power input frequency . 96
7.1.3 Adjustment of equipment . 97
7.1.4 Equipment configuration . 97
7.1.5 Test equipment . 97
7.1.6 Test equipment precautions . 97
7.1.7 Ambient conditions . 97
7.1.8 Connected loads . 97
7.1.9 Warm-up period . 97
7.2 Required test rig . 98
7.3 Protocol test-suite description methodology . 100
7.4 Detailed protocol test procedures . 100
7.4.1 Test-suite overview . 100
7.4.2 Declarations . 105
7.4.3 Constraints . 105
7.4.3.1 Abbreviations . 105
7.4.3.1.1 Subfield mnemonics . 105
7.4.3.1.2 Special characters used in the subfield definitions . 106
7.4.3.1.3 Station addresses and positions . 106
7.4.3.1.4 Tables of values for use in CPR test cases . 108
7.4.3.1.5 Tables of values for use in content checking test cases . 118
7.4.3.1.6 VDL4 burst formats . 121
7.4.3.2 Test cases . 139
7.4.3.2.1 Test case macros . 139
7.4.3.2.2 Test case descriptions . 141
Annex A (informative): Cross reference matrix . 300
ETSI
7 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
Annex B (informative): Description of ISO/IEC 9646 Test Methodology . 316
B.1 Overview of the structure of the ISO/IEC 9646 Test Suites . 316
B.2 Test case description . 316
B.3 Queue action . 318
B.4 Repeat construct . 318
B.5 Macro definitions . 319
B.6 Test case naming . 319
Annex C (informative): Bibliography . 320
History . 325
ETSI
8 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Aeronautics (AERO), and is now
submitted for the combined Public Enquiry and Vote phase of the ETSI standards EN Approval Procedure.
The present document is part 2 of a multi-part deliverable covering the VHF air-ground Digital Link (VDL) Mode 4
radio equipment; Technical characteristics and methods of measurement for ground-based equipment, as identified
below:
Part 1: "EN for ground equipment";
Part 2: "General description and data link layer";
Part 3: "Additional broadcast aspects";
Part 4: "Point-to-point functions";
Part 5: "Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive".
The present document is accompanied by an equivalent airborne standard, ETSI EN 302 842 [i.4] parts 1 to 4, covering
the VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of
measurement for airborne equipment.
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "need not", "will",
"will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms
for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
9 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
Introduction
The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4
ground-based radio transmitters, transceivers and receivers for air-ground communications operating in the VHF band,
using Gaussian-filtered Frequency Shift Keying (GFSK) Modulation with 25 kHz channel spacing and capable of
tuning to any of the 25 kHz channels from 112,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL)
Standards and Recommended Practices (SARPs) [1].
The present document may be used to produce tests for the assessment of the performance of the equipment.
ETSI
10 Draft ETSI EN 301 842-2 V1.7.0 (2014-12)
1 Scope
The present document applies to the following radio equipment types:
• Very High Frequency (VHF) Digital Link (VDL) Mode 4 ground-based radio transmitters and receivers for
air-ground communications operating in the VHF band, using Gaussian-filtered Frequency Shift Keying
(GFSK) Modulation with 25 kHz channel spacing and capable of tuning to any of the 25 kHz channels from
112,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL) Standards and Recommended
Practices (SARPs) [1].
The present document provides part 2 of the technical
...
EUROPEAN STANDARD
VHF air-ground Digital Link (VDL) Mode 4 radio equipment;
Technical characteristics and methods of measurement
for ground-based equipment;
Part 2: General description and data link layer
2 ETSI EN 301 842-2 V1.7.1 (2015-04)
Reference
REN/AERO-00020-2
Keywords
aeronautical, digital, radio, testing, VHF
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2015.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 301 842-2 V1.7.1 (2015-04)
Contents
Intellectual Property Rights . 8
Foreword . 8
Modal verbs terminology . 8
Introduction . 9
1 Scope . 10
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 12
3 Definitions and abbreviations . 13
3.1 General definitions . 13
3.2 Definition of bit order . 16
3.3 Abbreviations . 16
4 General description of VDL Mode 4 ground station link layer . 18
4.1 General . 18
4.1.1 Overview of VDL Mode 4 . 18
4.1.2 Relationship to OSI reference model . 19
4.1.3 VDL Mode 4 services . 20
4.1.4 ADS-B Function . 20
4.1.5 Operational scenarios . 21
4.1.6 VDL Mode 4 fundamentals . 21
4.1.7 Possible configuration of ground equipment . 22
4.1.8 Overall structure of specifications for VDL Mode 4 . 23
4.1.9 Equipment performance verification . 24
4.2 Ground quarantine . 25
4.3 System timing . 25
4.4 Net entry . 25
4.5 Autotune capability . 25
4.6 Autonomous and fixed access . 26
5 Minimum performance specification under standard test conditions . 26
5.1 MAC sublayer . 26
5.1.1 Services . 26
5.1.2 MAC sublayer services . 26
5.1.3 MAC sublayer parameters . 26
5.1.3.1 General . 26
5.1.3.2 Parameter M1 (number of slots per superframe) . 27
5.1.4 Time synchronization . 27
5.1.4.1 Primary . 27
5.1.4.2 Secondary . 27
5.1.4.3 Alignment to UTC second . 27
5.1.4.4 Data quality level . 27
5.1.5 Slot idle/busy notification . 28
5.1.5.1 Slot idle detection . 28
5.1.5.2 Slot busy detection . 28
5.1.5.3 Slot occupied detection . 28
5.1.5.4 Signal level indication . 28
5.1.6 Transmission processing . 28
5.1.7 Received transmission processing . 28
5.2 VSS sublayer . 29
5.2.1 Services . 29
5.2.1.1 Error detection . 29
5.2.1.2 Channel congestion . 29
5.2.2 Burst format . 29
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4 ETSI EN 301 842-2 V1.7.1 (2015-04)
5.2.2.1 VSS burst structure . 29
5.2.2.2 Version number . 30
5.2.2.3 Source address . 30
5.2.2.4 Message ID . 30
5.2.2.5 Information field . 31
5.2.2.6 Reservation fields . 31
5.2.2.7 Autonomous/directed flag . 32
5.2.3 VSS sublayer parameters . 32
5.2.3.1 General . 32
5.2.3.2 Parameter VS1 (number of ground quarantined slots) . 33
5.2.3.3 Parameter VS2 (minimum CCI performance) . 33
5.2.3.4 Parameter VS4 (quarantine slot re-use range) . 33
5.2.3.5 Parameter VS5 (maximum burst length) . 34
5.2.4 VSS quality of service parameters . 34
5.2.4.1 General . 34
5.2.4.2 Parameter Q1 (priority) . 34
5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) . 35
5.2.4.4 Parameter Q3 (replace queued data) . 36
5.2.4.5 Parameter Q4 (number of available slots) . 36
5.2.5 Received transmission processing . 37
5.2.6 Reserved access protocol specification . 37
5.2.6.1 Reservation table . 37
5.2.6.2 Selecting slots for transmission or reservation . 38
5.2.6.3 Reserved transmissions . 39
5.2.6.4 Reservation conflicts . 40
5.2.7 Random access protocol specification . 41
5.2.7.1 General . 41
5.2.7.2 Random access parameters. 41
5.2.7.3 Random access procedures. 42
5.2.8 Fixed access protocol specification . 42
5.2.8.1 General . 42
5.2.8.2 Recommendation . 43
5.2.9 Null reservation protocol specification . 43
5.2.9.1 Null reservation burst format . 43
5.2.10 Periodic broadcast protocol specification . 43
5.2.10.1 Periodic broadcast reservation burst format . 43
5.2.10.2 Periodic broadcast timers . 44
5.2.10.3 Periodic broadcast parameters . 44
5.2.10.4 Periodic broadcast reception procedures . 45
5.2.10.5 Periodic broadcast transmission procedures . 46
5.2.11 Incremental broadcast protocol specification . 48
5.2.11.1 Incremental broadcast reservation burst format . 48
5.2.11.2 Incremental broadcast parameters . 49
5.2.11.3 Incremental broadcast reception procedures . 50
5.2.11.4 Incremental broadcast transmission procedures . 50
5.2.12 Combined periodic broadcast and incremental broadcast protocol specification . 50
5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst. 50
5.2.13 Big Negative Dither (BND) broadcast protocol specifications . 51
5.2.13.1 BND reservation burst format . 51
5.2.13.2 BND broadcast parameters. 51
5.2.13.3 BND broadcast reception procedures . 51
5.2.14 Unicast request protocol specification . 52
5.2.14.1 Unicast request reservation burst format . 52
5.2.14.1a Unicast request parameters. 53
5.2.14.2 Unicast request reception procedures . 53
5.2.14.3 Unicast request transmission procedures . 54
5.2.15 Information transfer request protocol specification . 54
5.2.15.1 Information transfer request reservation burst format . 54
5.2.15.2 Information transfer request reception procedures . 55
5.2.16 Directed request protocol specification. 56
5.2.16.1 Directed request reservation burst format . 56
5.2.16.2 Directed request parameters . 59
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5 ETSI EN 301 842-2 V1.7.1 (2015-04)
5.2.16.3 Directed request reception procedures . 60
5.2.16.4 Directed request transmission procedures . 61
5.2.17 Block reservation protocols specification . 62
5.2.17.1 Superframe block reservation burst format . 62
5.2.17.2 Second frame block reservation burst format . 63
5.2.17.3 Superframe block reservation parameters . 64
5.2.17.4 Superframe block reservation reception procedures . 64
5.2.17.5 Second frame block reservation parameters . 65
5.2.17.6 Second frame block reservation reception procedures . 65
5.2.17.7 Superframe block reservation transmission procedures . 66
5.2.17.8 Second frame block reservation transmission procedures . 66
5.2.18 Response protocol specification . 67
5.2.18.1 Response burst format . 67
5.2.19 General request protocol specification . 67
5.2.19.1 General request burst format . 67
5.2.19.2 General request procedures . 68
5.2.20 General response protocol specification . 68
5.2.20.1 General response burst format. 68
5.2.20.2 General response procedures . 70
5.2.21 Retransmission procedures . 70
5.3 DLS sublayer . 71
5.3.1 Services . 71
5.3.1.1 General . 71
5.3.1.2 Data transfer . 71
5.3.1.3 Station address encoding . 71
5.3.1.4 DLS burst formats . 72
5.3.2 DLS system parameters . 73
5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) . 74
5.3.3 DLS procedures . 74
5.3.3.1 Broadcast . 74
5.3.3.2 DLS not supported . 74
5.3.3.3 User data packet reception . 74
5.4 Link Management Entity sublayer . 74
5.4.1 Services . 74
5.4.2 Synchronization burst format . 75
5.4.2.1 General . 75
5.4.2.2 Fixed and variable data fields. 75
5.4.2.3 Fixed data field format . 75
5.4.2.4 Variable data field format . 79
5.4.2.5 Synchronization burst request . 79
5.4.2.6 Link management burst . 79
5.4.3 Control (CTRL) parameter formats . 80
5.4.3.1 Encoding . 80
5.4.3.2 VDL Mode 4 parameter identification . 80
5.4.3.3 Ground-initiated modification parameters . 80
5.4.3.4 Ground-initiated information parameters . 83
5.4.3a LME timers and parameters . 86
5.4.3a.1 General . 86
5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter miss timer) . 87
5.4.4 LME procedures . 87
5.4.4.1 Synchronization burst procedures . 87
5.4.4.2 Peer Entity Contact Table (PECT) . 89
5.4.4.3 Network entry protocol specifications . 89
5.4.5 Additional material for ADS-B applications . 90
5.4.5.1 Information field formats . 90
5.4.5.2 ADS-B request format. 90
5.5 Additional requirements for ground stations . 91
5.5.1 System timing requirements . 91
5.5.1.1 Maintenance of Primary time . 91
5.5.2 Ground station interface requirements . 91
5.5.2.1 Ground station coordination . 91
5.5.2.2 Network timing requirements. 91
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6 ETSI EN 301 842-2 V1.7.1 (2015-04)
5.5.2.3 Application interface requirements . 92
5.5.2.4 Transmission control requirements . 92
5.5.2.5 Superframe block reservation rebroadcast procedures . 92
5.5.2.6 Fixed transmission parameters . 92
5.5.2.7 Protection of fixed access protocol transmissions by ground quarantine . 93
5.5.2.8 Protection of fixed access protocol transmissions by use of appropriate reservation protocols . 93
5.5.2.9 Restriction of autotune reservations . 93
5.5.2.10 Transmission time for autotune reservations . 93
5.5.2.11 Reporting of channel usage . 94
5.6 Definitions for compact position reporting . 94
5.6.1 Introduction. 94
5.6.2 Parameter symbols, data types, constants and variables . 94
5.6.2.1 Parameter symbols . 94
5.6.2.2 Data types . 94
5.6.2.3 Constants . 94
5.6.2.4 Variables . 94
5.6.2.5 Functions . 95
5.6.2.6 Patch constants . 95
5.6.3 Fixed data field position encoding . 95
5.6.4 Fixed data field position local decoding . 95
5.6.5 Fixed data field position global decoding . 95
5.6.6 Position report processing . 95
6 General design requirements . 95
6.1 Controls and indicators . 95
6.2 Operation of controls . 95
6.3 Warm up . 95
6.4 Effects of tests . 95
6.5 Software management . 96
6.6 Recovery from failure . 96
6.6.1 Failure of the VDL equipment . 96
6.7 Monitoring of proper operation . 96
7 Protocol test procedures . 96
7.1 General . 96
7.1.1 Input voltage . 96
7.1.2 Power input frequency . 96
7.1.3 Adjustment of equipment . 97
7.1.4 Equipment configuration . 97
7.1.5 Test equipment . 97
7.1.6 Test equipment precautions . 97
7.1.7 Ambient conditions . 97
7.1.8 Connected loads . 97
7.1.9 Warm-up period . 97
7.2 Required test rig . 98
7.3 Protocol test-suite description methodology . 100
7.4 Detailed protocol test procedures . 100
7.4.1 Test-suite overview . 100
7.4.2 Declarations . 105
7.4.3 Constraints . 105
7.4.3.1 Abbreviations . 105
7.4.3.1.1 Subfield mnemonics . 105
7.4.3.1.2 Special characters used in the subfield definitions . 106
7.4.3.1.3 Station addresses and positions . 106
7.4.3.1.4 Tables of values for use in CPR test cases . 108
7.4.3.1.5 Tables of values for use in content checking test cases . 118
7.4.3.1.6 VDL4 burst formats . 121
7.4.3.2 Test cases . 139
7.4.3.2.1 Test case macros . 139
7.4.3.2.2 Test case descriptions . 141
Annex A (informative): Cross reference matrix . 300
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7 ETSI EN 301 842-2 V1.7.1 (2015-04)
Annex B (informative): Description of ISO/IEC 9646 Test Methodology . 316
B.1 Overview of the structure of the ISO/IEC 9646 Test Suites . 316
B.2 Test case description . 316
B.3 Queue action . 318
B.4 Repeat construct . 318
B.5 Macro definitions . 319
B.6 Test case naming . 319
Annex C (informative): Bibliography . 320
History . 325
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8 ETSI EN 301 842-2 V1.7.1 (2015-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://ipr.etsi.org).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Aeronautics (AERO).
The present document is part 2 of a multi-part deliverable covering the VHF air-ground Digital Link (VDL) Mode 4
radio equipment; Technical characteristics and methods of measurement for ground-based equipment, as identified
below:
Part 1: "EN for ground equipment";
Part 2: "General description and data link layer";
Part 3: "Additional broadcast aspects";
Part 4: "Point-to-point functions";
Part 5: "Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive".
The present document is accompanied by an equivalent airborne standard, ETSI EN 302 842 [i.4] parts 1 to 4, covering
the VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of
measurement for airborne equipment.
National transposition dates
Date of adoption of this EN: 6 April 2015
Date of latest announcement of this EN (doa): 31 July 2015
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 January 2016
Date of withdrawal of any conflicting National Standard (dow): 31 January 2017
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
9 ETSI EN 301 842-2 V1.7.1 (2015-04)
Introduction
The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4
ground-based radio transmitters, transceivers and receivers for air-ground communications operating in the VHF band,
using Gaussian-filtered Frequency Shift Keying (GFSK) Modulation with 25 kHz channel spacing and capable of
tuning to any of the 25 kHz channels from 112,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL)
Standards and Recommended Practices (SARPs) [1].
The present document may be used to produce tests for the assessment of the performance of the equipment.
ETSI
10 ETSI EN 301 842-2 V1.7.1 (2015-04)
1 Scope
The present document applies to the following radio equipment types:
• Very High Frequency (VHF) Digital Link (VDL) Mode 4 ground-based radio transmitters and receivers for
air-ground communications operating in the VHF band, using Gaussian-filtered Frequency Shift Keying
(GFSK) Modulation with 25 kHz channel spacing and capable of tuning to any of the 25 kHz channels from
112,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL) Standards and Recommended
Practices (SARPs) [1].
The present document provides part 2 of the technical specifications.
The present document is designed to ensure that equipment certified to it will be compatible with the relevant ICAO
VDL SARPs [1] and ICAO VDL4 Tech
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.KQLþQHVHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for ground-based equipment; Part 2: General description and data link layer49.090On-board equipment and instruments35.100.20Podatkovni povezovalni slojData link layer33.060.99Druga oprema za radijske komunikacijeOther equipment for radiocommunicationsICS:Ta slovenski standard je istoveten z:EN 301 842-2 V1.7.1SIST EN 301 842-2 V1.7.1:2015en,fr,de01-oktober-2015SIST EN 301 842-2 V1.7.1:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)2
Reference REN/AERO-00020-2 Keywords aeronautical, digital, radio, testing, VHF ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
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Important notice The present document can be downloaded from: http://www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: https://portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2015. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)3 Contents Intellectual Property Rights . 8 Foreword . 8 Modal verbs terminology . 8 Introduction . 9 1 Scope . 10 2 References . 12 2.1 Normative references . 12 2.2 Informative references . 12 3 Definitions and abbreviations . 13 3.1 General definitions . 13 3.2 Definition of bit order . 16 3.3 Abbreviations . 16 4 General description of VDL Mode 4 ground station link layer . 18 4.1 General . 18 4.1.1 Overview of VDL Mode 4 . 18 4.1.2 Relationship to OSI reference model . 19 4.1.3 VDL Mode 4 services . 20 4.1.4 ADS-B Function . 20 4.1.5 Operational scenarios . 21 4.1.6 VDL Mode 4 fundamentals . 21 4.1.7 Possible configuration of ground equipment . 22 4.1.8 Overall structure of specifications for VDL Mode 4 . 23 4.1.9 Equipment performance verification . 24 4.2 Ground quarantine . 25 4.3 System timing . 25 4.4 Net entry . 25 4.5 Autotune capability . 25 4.6 Autonomous and fixed access . 26 5 Minimum performance specification under standard test conditions . 26 5.1 MAC sublayer . 26 5.1.1 Services . 26 5.1.2 MAC sublayer services . 26 5.1.3 MAC sublayer parameters . 26 5.1.3.1 General . 26 5.1.3.2 Parameter M1 (number of slots per superframe) . 27 5.1.4 Time synchronization . 27 5.1.4.1 Primary . 27 5.1.4.2 Secondary . 27 5.1.4.3 Alignment to UTC second . 27 5.1.4.4 Data quality level . 27 5.1.5 Slot idle/busy notification . 28 5.1.5.1 Slot idle detection . 28 5.1.5.2 Slot busy detection . 28 5.1.5.3 Slot occupied detection . 28 5.1.5.4 Signal level indication . 28 5.1.6 Transmission processing . 28 5.1.7 Received transmission processing . 28 5.2 VSS sublayer . 29 5.2.1 Services . 29 5.2.1.1 Error detection . 29 5.2.1.2 Channel congestion . 29 5.2.2 Burst format . 29 SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)4 5.2.2.1 VSS burst structure . 29 5.2.2.2 Version number . 30 5.2.2.3 Source address . 30 5.2.2.4 Message ID . 30 5.2.2.5 Information field . 31 5.2.2.6 Reservation fields . 31 5.2.2.7 Autonomous/directed flag . 32 5.2.3 VSS sublayer parameters . 32 5.2.3.1 General . 32 5.2.3.2 Parameter VS1 (number of ground quarantined slots) . 33 5.2.3.3 Parameter VS2 (minimum CCI performance) . 33 5.2.3.4 Parameter VS4 (quarantine slot re-use range) . 33 5.2.3.5 Parameter VS5 (maximum burst length) . 34 5.2.4 VSS quality of service parameters . 34 5.2.4.1 General . 34 5.2.4.2 Parameter Q1 (priority) . 34 5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) . 35 5.2.4.4 Parameter Q3 (replace queued data) . 36 5.2.4.5 Parameter Q4 (number of available slots) . 36 5.2.5 Received transmission processing . 37 5.2.6 Reserved access protocol specification . 37 5.2.6.1 Reservation table . 37 5.2.6.2 Selecting slots for transmission or reservation . 38 5.2.6.3 Reserved transmissions . 39 5.2.6.4 Reservation conflicts . 40 5.2.7 Random access protocol specification . 41 5.2.7.1 General . 41 5.2.7.2 Random access parameters. 41 5.2.7.3 Random access procedures. 42 5.2.8 Fixed access protocol specification . 42 5.2.8.1 General . 42 5.2.8.2 Recommendation . 43 5.2.9 Null reservation protocol specification . 43 5.2.9.1 Null reservation burst format . 43 5.2.10 Periodic broadcast protocol specification . 43 5.2.10.1 Periodic broadcast reservation burst format . 43 5.2.10.2 Periodic broadcast timers . 44 5.2.10.3 Periodic broadcast parameters . 44 5.2.10.4 Periodic broadcast reception procedures . 45 5.2.10.5 Periodic broadcast transmission procedures . 46 5.2.11 Incremental broadcast protocol specification . 48 5.2.11.1 Incremental broadcast reservation burst format . 48 5.2.11.2 Incremental broadcast parameters . 49 5.2.11.3 Incremental broadcast reception procedures . 50 5.2.11.4 Incremental broadcast transmission procedures . 50 5.2.12 Combined periodic broadcast and incremental broadcast protocol specification . 50 5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst. 50 5.2.13 Big Negative Dither (BND) broadcast protocol specifications . 51 5.2.13.1 BND reservation burst format . 51 5.2.13.2 BND broadcast parameters. 51 5.2.13.3 BND broadcast reception procedures . 51 5.2.14 Unicast request protocol specification . 52 5.2.14.1 Unicast request reservation burst format . 52 5.2.14.1a Unicast request parameters. 53 5.2.14.2 Unicast request reception procedures . 53 5.2.14.3 Unicast request transmission procedures . 54 5.2.15 Information transfer request protocol specification . 54 5.2.15.1 Information transfer request reservation burst format . 54 5.2.15.2 Information transfer request reception procedures . 55 5.2.16 Directed request protocol specification. 56 5.2.16.1 Directed request reservation burst format . 56 5.2.16.2 Directed request parameters . 59 SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)5 5.2.16.3 Directed request reception procedures . 60 5.2.16.4 Directed request transmission procedures . 61 5.2.17 Block reservation protocols specification . 62 5.2.17.1 Superframe block reservation burst format . 62 5.2.17.2 Second frame block reservation burst format . 63 5.2.17.3 Superframe block reservation parameters . 64 5.2.17.4 Superframe block reservation reception procedures . 64 5.2.17.5 Second frame block reservation parameters . 65 5.2.17.6 Second frame block reservation reception procedures . 65 5.2.17.7 Superframe block reservation transmission procedures . 66 5.2.17.8 Second frame block reservation transmission procedures . 66 5.2.18 Response protocol specification . 67 5.2.18.1 Response burst format . 67 5.2.19 General request protocol specification . 67 5.2.19.1 General request burst format . 67 5.2.19.2 General request procedures . 68 5.2.20 General response protocol specification . 68 5.2.20.1 General response burst format. 68 5.2.20.2 General response procedures . 70 5.2.21 Retransmission procedures . 70 5.3 DLS sublayer . 71 5.3.1 Services . 71 5.3.1.1 General . 71 5.3.1.2 Data transfer . 71 5.3.1.3 Station address encoding . 71 5.3.1.4 DLS burst formats . 72 5.3.2 DLS system parameters . 73 5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) . 74 5.3.3 DLS procedures . 74 5.3.3.1 Broadcast . 74 5.3.3.2 DLS not supported . 74 5.3.3.3 User data packet reception . 74 5.4 Link Management Entity sublayer . 74 5.4.1 Services . 74 5.4.2 Synchronization burst format . 75 5.4.2.1 General . 75 5.4.2.2 Fixed and variable data fields. 75 5.4.2.3 Fixed data field format . 75 5.4.2.4 Variable data field format . 79 5.4.2.5 Synchronization burst request . 79 5.4.2.6 Link management burst . 79 5.4.3 Control (CTRL) parameter formats . 80 5.4.3.1 Encoding . 80 5.4.3.2 VDL Mode 4 parameter identification . 80 5.4.3.3 Ground-initiated modification parameters . 80 5.4.3.4 Ground-initiated information parameters . 83 5.4.3a LME timers and parameters . 86 5.4.3a.1 General . 86 5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter miss timer) . 87 5.4.4 LME procedures . 87 5.4.4.1 Synchronization burst procedures . 87 5.4.4.2 Peer Entity Contact Table (PECT) . 89 5.4.4.3 Network entry protocol specifications . 89 5.4.5 Additional material for ADS-B applications . 90 5.4.5.1 Information field formats . 90 5.4.5.2 ADS-B request format. 90 5.5 Additional requirements for ground stations . 91 5.5.1 System timing requirements . 91 5.5.1.1 Maintenance of Primary time . 91 5.5.2 Ground station interface requirements . 91 5.5.2.1 Ground station coordination . 91 5.5.2.2 Network timing requirements. 91 SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)6 5.5.2.3 Application interface requirements . 92 5.5.2.4 Transmission control requirements . 92 5.5.2.5 Superframe block reservation rebroadcast procedures . 92 5.5.2.6 Fixed transmission parameters . 92 5.5.2.7 Protection of fixed access protocol transmissions by ground quarantine . 93 5.5.2.8 Protection of fixed access protocol transmissions by use of appropriate reservation protocols . 93 5.5.2.9 Restriction of autotune reservations . 93 5.5.2.10 Transmission time for autotune reservations . 93 5.5.2.11 Reporting of channel usage . 94 5.6 Definitions for compact position reporting . 94 5.6.1 Introduction. 94 5.6.2 Parameter symbols, data types, constants and variables . 94 5.6.2.1 Parameter symbols . 94 5.6.2.2 Data types . 94 5.6.2.3 Constants . 94 5.6.2.4 Variables . 94 5.6.2.5 Functions . 95 5.6.2.6 Patch constants . 95 5.6.3 Fixed data field position encoding . 95 5.6.4 Fixed data field position local decoding . 95 5.6.5 Fixed data field position global decoding . 95 5.6.6 Position report processing . 95 6 General design requirements . 95 6.1 Controls and indicators . 95 6.2 Operation of controls . 95 6.3 Warm up . 95 6.4 Effects of tests . 95 6.5 Software management . 96 6.6 Recovery from failure . 96 6.6.1 Failure of the VDL equipment . 96 6.7 Monitoring of proper operation . 96 7 Protocol test procedures . 96 7.1 General . 96 7.1.1 Input voltage . 96 7.1.2 Power input frequency . 96 7.1.3 Adjustment of equipment . 97 7.1.4 Equipment configuration . 97 7.1.5 Test equipment . 97 7.1.6 Test equipment precautions . 97 7.1.7 Ambient conditions . 97 7.1.8 Connected loads . 97 7.1.9 Warm-up period . 97 7.2 Required test rig . 98 7.3 Protocol test-suite description methodology . 100 7.4 Detailed protocol test procedures . 100 7.4.1 Test-suite overview . 100 7.4.2 Declarations . 105 7.4.3 Constraints . 105 7.4.3.1 Abbreviations . 105 7.4.3.1.1 Subfield mnemonics . 105 7.4.3.1.2 Special characters used in the subfield definitions . 106 7.4.3.1.3 Station addresses and positions . 106 7.4.3.1.4 Tables of values for use in CPR test cases . 108 7.4.3.1.5 Tables of values for use in content checking test cases . 118 7.4.3.1.6 VDL4 burst formats . 121 7.4.3.2 Test cases . 139 7.4.3.2.1 Test case macros . 139 7.4.3.2.2 Test case descriptions . 141 Annex A (informative): Cross reference matrix . 300 SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)7 Annex B (informative): Description of ISO/IEC 9646 Test Methodology . 316 B.1 Overview of the structure of the ISO/IEC 9646 Test Suites . 316 B.2 Test case description . 316 B.3 Queue action . 318 B.4 Repeat construct . 318 B.5 Macro definitions . 319 B.6 Test case naming . 319 Annex C (informative): Bibliography . 320 History . 325
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)8 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Aeronautics (AERO). The present document is part 2 of a multi-part deliverable covering the VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for ground-based equipment, as identified below: Part 1: "EN for ground equipment"; Part 2: "General description and data link layer"; Part 3: "Additional broadcast aspects"; Part 4: "Point-to-point functions"; Part 5: "Harmonized EN covering the essential requirements of article 3.2 of the R&TTE Directive". The present document is accompanied by an equivalent airborne standard, ETSI EN 302 842 [i.4] parts 1 to 4, covering the VHF air-ground Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for airborne equipment.
National transposition dates Date of adoption of this EN: 6 April 2015 Date of latest announcement of this EN (doa): 31 July 2015 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 January 2016 Date of withdrawal of any conflicting National Standard (dow): 31 January 2017
Modal verbs terminology In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). "must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation. SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)9 Introduction The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4 ground-based radio transmitters, transceivers and receivers for air-ground communications operating in the VHF band, using Gaussian-filtered Frequency Shift Keying (GFSK) Modulation with 25 kHz channel spacing and capable of tuning to any of the 25 kHz channels from 112,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL) Standards and Recommended Practices (SARPs) [1]. The present document may be used to produce tests for the assessment of the performance of the equipment. SIST EN 301 842-2 V1.7.1:2015
ETSI ETSI EN 301 842-2 V1.7.1 (2015-04)10 1 Scope The present document applies to the following radio equipment types: • Very High Frequency (VHF) Digital Link (VDL) Mode 4 ground-based radio transmitters and receivers for air-ground communications operating in the VHF band, using Gaussian-filtered Frequency Shift Keying (GFSK) Modulation with 25 kHz channel spacing and capable of tuning to any of the 25 kHz channels from 112,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL) Standards and Recommended Practices (SARPs) [1]. The present document provides part 2 of the technical specifications. The present document is designed to ensure that equipment certified to it will be com
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