SIST EN 301 842-4 V1.2.1:2007

SLOVENSKI STANDARD
SIST EN 301 842-4 V1.2.1:2007
01-februar-2007
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Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF air-ground Digital
Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of
measurement for ground-based equipment Part 4: Point-to-point functions
Ta slovenski standard je istoveten z: EN 301 842-4 Version 1.2.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
SIST EN 301 842-4 V1.2.1:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 301 842-4 V1.2.1:2007

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SIST EN 301 842-4 V1.2.1:2007

ETSI EN 301 842-4 V1.2.1 (2006-11)
European Standard (Telecommunications series)

Electromagnetic compatibility
and Radio spectrum Matters (ERM);
VHF air-ground Digital Link (VDL) Mode 4 radio equipment;
Technical characteristics and methods of measurement
for ground-based equipment;
Part 4: Point-to-point functions

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SIST EN 301 842-4 V1.2.1:2007
 2 ETSI EN 301 842-4 V1.2.1 (2006-11)



Reference
REN/ERM-TG25-029-4
Keywords
aeronautical, digital, radio, testing, VHF
ETSI
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SIST EN 301 842-4 V1.2.1:2007
 3 ETSI EN 301 842-4 V1.2.1 (2006-11)
Contents
Intellectual Property Rights.6
Foreword.6
Introduction .7
1 Scope.8
2 References.9
3 Definitions and abbreviations.10
3.1 Definitions.10
3.1.1 Basic reference model definitions.10
3.1.2 Service conventions definitions .10
3.1.3 General definitions.10
3.2 Abbreviations.10
4 General description of VDL Mode 4 ground station point-to-point services.12
4.1 General.12
4.2 Data Link Service (DLS) and Link Management Entity (LME) .12
4.2.1 General.12
4.2.2 DLS timers.15
4.2.3 DLS counters.15
4.2.4 Toggle bit (T).16
4.2.5 State variables (T and T ) .16
t r
4.2.6 Initialize Bit (IB).16
4.2.7 More bit (M) .16
4.2.8 Priority (pr).17
4.2.9 Message fragmentation and concatenation .17
4.2.10 DLS procedures.17
4.2.10.1 Selection of DLS procedures.17
4.2.10.2 Short transmission procedures .17
4.2.10.3 Long transmission procedures.18
4.2.11 Linking transmissions.19
4.2.11.1 Types of linking .19
4.2.11.2 Combined RTS / DATA DLPDUs.19
4.2.11.3 Combined DATA / ACK DLPDUs.20
4.2.11.4 Combined RTS / ACK DLPDUs .20
4.2.11.5 Combined CTS / ACK DLPDUs .20
4.2.12 Ground-air link management.20
4.2.13 Air-air link management.20
4.3 Additional VSS Services .20
5 Minimum performance specification under standard test conditions.21
5.1 DLS Sublayer.21
5.1.1 General.21
5.1.1.1 Services.21
5.1.1.2 Data transfer.21
5.1.1.3 DATA DLPDU duplicate suppression and sequencing .22
5.1.1.4 Error detection.22
5.1.1.5 Station identification.22
5.1.1.6 Broadcast addressing.22
5.1.1.7 DLS Priority.22
5.1.1.8 DLS Link control DLPDUs .23
5.1.2 DLS protocol specification .23
5.1.2.1 State Variables.23
5.1.2.2 DLS burst formats.23
5.1.3 DLS system parameters.27
5.1.4 DLS procedures.27
ETSI

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SIST EN 301 842-4 V1.2.1:2007
 4 ETSI EN 301 842-4 V1.2.1 (2006-11)
5.1.4.1 Setting of re-transmission parameter.27
5.1.4.2 Selection of user data packet for transmission .28
5.1.4.3 Selection of transmission procedures.29
5.1.4.4 Short transmission procedures .30
5.1.4.5 Long transmission procedures.31
5.1.4.6 No link with sender .33
5.1.4.7 User data packet reception .34
5.1.4.8 Receipt of ACK DLPDU .34
5.1.4.9 Link reset.35
5.1.4.10 Linking DLS DLPDU transmissions.35
5.1.4.11 CTRL DLPDU.36
5.2 Link management entity sublayer.36
5.2.1 Services.36
5.2.1.1 General.36
5.2.1.2 Link provision.37
5.2.1.3 Link change notifications.37
5.2.1.4 CTRL DLPDU.37
5.2.1.5 Broadcast link management burst .38
5.2.2 Control (CTRL) parameter formats .38
5.2.2.1 Encoding.38
5.2.2.2 General purpose information parameters .38
5.2.2.3 Mobile-initiated information parameters.42
5.2.2.4 Ground-initiated modification parameters .43
5.2.2.5 Ground-initiated information parameters.46
5.2.3 LME timers and parameters.48
5.2.3.1 General.48
5.2.3.2 Timer TL1 (maximum link overlap time) .49
5.2.3.3 Parameters TL2 (link initialization time) .49
5.2.3.4 Timer TL4 (leave generation latency).49
5.2.4 CTRL DLPDU types and procedures .50
5.2.5 CTRL transmission procedures.53
5.2.5.1 Link connectivity procedures.53
5.2.5.2 Ground Station Identification.53
5.2.5.3 Link establishment.53
5.2.5.4 Mobile-initiated handoff.54
5.2.5.5 Mobile-requested ground-initiated handoff.54
5.2.5.6 Ground-initiated handoff.55
5.2.5.7 Ground-requested mobile-initiated handoff.55
5.2.5.8 Ground-requested broadcast handoff .55
5.2.5.9 Ground-commanded autotune.56
5.2.6 VDL Mode 4 Mobile Subnetwork Dependent Convergence Function (SNDCF) .56
5.2.6.1 Frame Mode SNDCF .56
5.3 Additional VSS Requirements.56
5.3.1 Additional VSS quality of service parameters.56
5.3.1.1 Parameter Q5 (VSS retransmission parameters) .56
5.3.2 Unicast request protocol specification .57
5.3.2.1 Unicast request parameters.57
5.3.2.2 Unicast request transmission procedures .58
5.3.3 Information transfer request protocol specification .58
5.3.3.1 Information transfer request parameters.58
5.3.3.2 Information transfer request transmission procedures .60
5.3.3.3 Information transfer request acknowledgement procedures.60
5.3.4 Retransmission procedures.60
6 General design requirements.61
7 Protocol test procedures.61
7.1 General.61
7.2 Required test rig .61
7.3 Protocol test-suite description methodology .62
7.4 Detailed protocol test procedures .62
7.4.1 Test-suite overview.62
ETSI

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SIST EN 301 842-4 V1.2.1:2007
 5 ETSI EN 301 842-4 V1.2.1 (2006-11)
7.4.2 Declarations.64
7.4.3 Constraints.64
7.4.3.1 Abbreviations.64
7.4.3.1.1 Subfield mnemonics.64
7.4.3.1.2 Special characters used in the subfield definitions .65
7.4.3.1.3 Station addresses and positions .65
7.4.3.1.4 VDL bursts.67
7.4.3.2 Test cases.97
7.4.3.2.1 Test case macros.98
7.4.3.2.2 Test case descriptions .100
Annex A (informative): Cross reference matrix .155
Annex B (informative): Bibliography.164
History .169

ETSI

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SIST EN 301 842-4 V1.2.1:2007
 6 ETSI EN 301 842-4 V1.2.1 (2006-11)
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://webapp.etsi.org/IPR/home.asp).
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 (Telecommunications series) has been produced by ETSI Technical Committee
Electromagnetic compatibility and Radio spectrum Matters (ERM).
The present document is part 4 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: "VDL 4 ground-based equipment compliance with the SES 552/2004 interoperability Regulation";
Part 6: "Harmonized EN covering essential requirements of article 3.2 of the R&TTE Directive".
The present document is accompanied by an equivalent airborne standard, EN 302 842 [7] Parts 1 to 5, 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: 24 November 2006
Date of latest announcement of this EN (doa): 28 February 2007
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 August 2007
Date of withdrawal of any conflicting National Standard (dow): 31 August 2007

ETSI

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SIST EN 301 842-4 V1.2.1:2007
 7 ETSI EN 301 842-4 V1.2.1 (2006-11)
Introduction
The present document is part of a multi-part deliverable developed by ETSI and is designed to fit in a modular structure
to cover all radio and telecommunications terminal equipment within the scope of the R&TTE Directive [9]. The
modular structure is shown in EG 201 399 [11].
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 118,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL)
Standards and Recommended Practices (SARPs) [8].
The present document may be used to produce tests for the assessment of the performance of the equipment. The
performance of the equipment submitted for type testing should be representative of the performance of the
corresponding production model.
The present document has been written on the assumption that:
• the type test measurements will be performed only once, in an accredited test laboratory and the measurements
accepted by the various authorities in order to grant type approval;
• if equipment available on the market is required to be checked it will be tested in accordance with the methods
of measurement specified in the present document or a documented alternative approved by the certifying
authority;
• equipment comply with EN 301 489-22 [2], EN 301 842-1 [4] and EN 301 842-2 [5].
The present document also indicates VDL Mode 4 compliance with the SES 552/2004 interoperability Regulation [10].
ETSI

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SIST EN 301 842-4 V1.2.1:2007
 8 ETSI EN 301 842-4 V1.2.1 (2006-11)
1 Scope
The present document applies to the following radio equipment types:
1) 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
118,000 MHz to 136,975 MHz as defined in ICAO VHF Digital Link (VDL) Standards and Recommended
Practices (SARPs) [8].
The present document provides part 4 of the technical specifications.
The present document is designed to ensure that equipment certified to it will be compatible with the relevant ICAO
VHF Digital Link (VDL) Standards and Recommended Practices (SARPs) [8] and VDL Mode 4 Technical Manual
(TM) [1] and with the SES 552/2004 interoperability Regulation [10].
Manufacturers should note that in future the tuning range for the ground transceivers may also cover any 25 kHz
channel from 108,000 MHz to 117,975 MHz.
The scope of the present document is limited to ground stations. The equivalent specification for airborne stations is
EN 302 842 [7].
A description of the scope of the VDL Mode 4 system is provided in part 2 of these technical specifications
(see EN 301 842-2 [5], clause 1).
EN 301 842-1 [4] deals with tests of the physical layer, EN 301 842-2 [5] deals with core link layer functionality and
EN 301 842-3 [6] with additional broadcast functionality. The present document deals with tests of the datalink service
(DLS) layer and the link layer sufficient to support point-to-point functionality. Note that, as described in
EN 301 842-2 [5], a system supporting point-to-point functionality is required to conform to EN 301 489-22 [2],
EN 301 842-1 [4], EN 301 842-2 [5] and the specification in the present document.
The present document is organized as follows:
• clause 2 provides references to relevant documents;
• clause 3 provides general definitions, abbreviations and symbols used;
• clause 4 describes the VDL Mode 4 ground station point-to-point functions;
• clause 5 provides performance specifications for the VDL Mode 4 ground station;
• clause 6 provides general design requirements;
• clause 7 provide protocol tests for the point-to-point functions of the system;
• annex A provides a detailed cross-reference to the relevant requirements contained in [1];
• annex B provides a Bibliography;
• a document history.
Note that the system can support a very wide range of functions. It is not prac
...