SIST EN 302 842-2 V1.1.1:2006
(Main)Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF air-ground and air-air Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for aeronautical mobile (airborne) equipment; Part 2: General description and data link layer
- Abstract
The present document provides part 2 of the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4 aeronautical mobile (airborne) radio transmitters, transceivers and receivers for air-ground and air-air 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 VDL SARPs [2]. The present document is designed to ensure that equipment certified to it will be compatible with the relevant ICAO VDL SARPs [2] and ICAO VDL4 Technical Manual [1].
NOTE: In clause 5.1.4, Tertiary time, as described by the ICAO VDL4 Technical Manual [1], has not been included as a requirement in the present document due to the opinion of the ETSI Working Group that insufficient evidence was available to be able to verify correct operation of a "floating network" of stations operating on tertiary time. Manufacturers should note that in future the tuning range for the transmitter may also cover any 25 kHz channel from 112,000 MHz to 117,975 MHz and the receiver(s) may cover any 25 kHz channel from 108,000 MHz to 117,975 MHz. The present document applies to "aeronautical mobile (airborne and in some cases ground vehicles)" equipment which will hereinafter be referred to as "mobile" equipment. The scope of the present document is limited to mobile stations. The equivalent specification for ground stations is EN 301 842 [13].
The VDL Mode 4 system provides digital communication exchanges between aircraft and ground based systems and other aircraft supporting surveillance and communication applications. The supported modes of communication include:
• broadcast and point-to-point communication;
• broadcast services including Automatic Dependent Surveillance - Broadcast (ADS-B), Traffic Information Service - Broadcast (TIS-B), Flight Information Service - Broadcast (FIS-B) capabilities and GNSS Augmentation Service - Broadcast (GNS-B);
• air-air and ground-air services;
• operation without ground infrastructure.
VDL Mode 4 is designed to be an Air/Ground subsystem of the Aeronautical Telecommunication Network (ATN) (see ICAO ATN SARPs [8]) using the AM(R)S band and it is organized according to the Open Systems Interconnection (OSI) model (defined by ISO). It provides reliable sub network services to the ATN system. Other networks can also be supported but have not been the focus of the present document. The present document is derived from the standards and specifications in:
• ICAO VDL4 Technical Manual [1] produced under the auspices of the International Civil Aviation Organization (ICAO).
• Other relevant standards as defined in clause 2.
It is envisaged that manufacturers may provide equipment supporting:
• broadcast services only;
• point-to-point services only;
• both broadcast and point-to-point services.
EN 302 842-1 [4] deals with tests of the physical layer. The present document defines the core link layer requirements for the VDL Mode 4 mobile station necessary to support all types of equipment. This includes a simple position broadcast functionality.
The present document deals with tests of the link layer sufficient to support core link layer functionality, and it also includes requirements and tests sufficient to recognize and respond to transmissions associated with point-to-point communication. The present document does not address requirements for the full ADS-B message set, or for other broadcast applications that can be supported by the VDL Mode 4 equipment. These are covered by EN 302 842-3 [9].
Detailed requirements for point-to-point communication are beyond the scope of the present document, but can be found in EN 302 842-4 [10]. EN 302 842-4 [10] also includes the interface to the Aeronautical Telecommunication Network (ATN) as defined in ICAO ATN SARPs [8].
- Status
- Published
- Publication Date
- 28-Feb-2006
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Mar-2006
- Due Date
- 01-Mar-2006
- Completion Date
- 01-Mar-2006
- Mandate
- M/318
SIST EN 302 842-2 V1.1.1:2006 is the Slovenian adoption of ETSI EN 302 842-2 V1.1.1 for VHF air-ground and air-air Digital Link (VDL) Mode 4 airborne equipment. It specifies the general description and data link layer for mobile airborne radio transmitters, transceivers and receivers, including the link-layer behavior needed for broadcast and point-to-point use. The document is aimed at equipment manufacturers, test laboratories, certification teams and buyers of aeronautical mobile radio equipment.
What does SIST EN 302 842-2 V1.1.1:2006 specify?
SIST EN 302 842-2 V1.1.1:2006 specifies part 2 of the technical requirements for VDL Mode 4 aeronautical mobile (airborne) radio equipment. It covers airborne stations that use Gaussian Filtered Frequency Shift Keying (GFSK), 25 kHz channel spacing, and tuning across the VHF aeronautical band from 118,000 MHz to 136,975 MHz.
The document is limited to mobile stations. It also points readers to the equivalent ground-station specification, EN 301 842, for non-airborne equipment.
The document is organized into clauses for scope, references, definitions and abbreviations, general description, minimum performance requirements, design requirements, and protocol test procedures.
| Annex | What it covers |
|---|---|
| Annex B | ISO/IEC 9646 test-suite structure, test case description, queue action, repeat construct, macro definitions, and test-case naming |
What are the key requirements of SIST EN 302 842-2 V1.1.1:2006?
SIST EN 302 842-2 V1.1.1:2006 defines the data-link behavior a VDL Mode 4 airborne station has to show under standard test conditions, and it ties that behavior to specific procedures for testing. In practice, this means the standard is not just a system description - it also tells testers what the station has to do on the air interface, how to treat received bursts, and how to manage access to shared slots.
MAC sublayer behavior
Clause 5.1 defines how the MAC sublayer handles the shared communication path, timing, and burst transfer.
- The MAC sublayer has to acquire the shared communication path and exchange data with the physical layer and the VSS sublayer. For a reader, this means the station must coordinate slot use cleanly with the layers above and below it.
- Time synchronization is part of the MAC behavior, including alignment to the UTC second and a data quality level. This matters because slot-based access depends on precise timing.
- The station may only begin transmission at the slot boundary, and delayed bursts start 4 ms after the beginning of the slot if the slot is idle. This is important for avoiding slot overlap and interference.
- Bursts with an invalid Cyclic Redundancy Code (CRC) are discarded, while valid bursts are passed upward together with received signal quality and reception time. In practice, this is the basic receive-screening rule for the station.
VSS sublayer and access protocols
Clause 5.2 defines the VSS sublayer, its parameters, and the reservation and broadcast protocols.
- The VSS burst structure includes fields such as version number, source address, Message ID, information field, reservation fields, and an autonomous/directed flag. This tells implementers how the upper link layer frames information and reservations.
- The document defines VSS parameters such as VS1, VS2, VS4, VS5, and quality-of-service parameters Q1 to Q4. These are the values a manufacturer has to map into equipment behavior and test evidence.
- The station has to recognize all reservation types, discard unrecognized reservation types, and reject known types with invalid subfields or reserved values when appropriate. This is important for safe interoperability with other stations.
- Reserved access, random access, null reservation, periodic broadcast, incremental broadcast, combined periodic/incremental broadcast, big negative dither (BND) broadcast, unicast request, information transfer request, directed request, block reservation, response, general request, and general response protocols are all specified. In practice, this is the core of how a VDL Mode 4 station requests, reserves, and uses slots.
- The periodic and incremental broadcast procedures define how a station schedules and repeats broadcast transmissions, including reception and transmission procedures. This matters for equipment that has to support recurring surveillance or data broadcast behavior.
- The document also includes procedures for handling channel congestion and for determining burst length and current slot position. These rules are used in interoperability and conformance testing.
DLS, LME, and Compact Position Reporting
Clause 5.3, 5.4 and 5.6 cover data transfer, link management, and position reporting support.
- The DLS sublayer defines station address encoding, DLS burst formats, system parameters including ND4, and procedures for broadcast, unsupported DLS, and user data packet reception. This tells implementers how data packets move through the link.
- The Link Management Entity (LME) supports broadcast services, synchronization burst formats, control parameter formats, synchronization burst procedures, Peer Entity Contact Table (PECT) handling, and network entry procedures. In practice, this is the part that keeps stations synchronized and able to join the network.
- Additional material is included for ADS-B applications, including information field formats and an ADS-B request format. This matters for airborne surveillance implementations.
- Compact Position Reporting (CPR) is defined with symbols, data types, constants, variables, functions, position encoding, local decoding, global decoding, transition level straddling, and position report processing. For the reader, this is the position-reporting logic behind airborne broadcast coordinates.
Design requirements and protocol testing
Clause 6 and clause 7 turn the link-layer requirements into a testable product standard.
- Clause 6 covers controls and indicators, warm-up, airworthiness, intended function, International Telecommunications Union regulations, fire protection, operation and accessibility of controls, failure behavior, software management, transceiver configuration, redundant transceivers, reception and transmission capability, monitoring of proper operation, and power-up self test. These items matter because they affect installation, reliability, and certification readiness.
- Clause 7 defines the protocol test conditions, including input voltage, input frequency, equipment adjustment, configuration, test equipment precautions, ambient conditions, connected loads, the required test rig, and test-suite methodology. This is the part that labs use to run repeatable conformance tests.
- The detailed protocol test procedures include statistical checks of slot selection and reservation behavior. That is how the document verifies that the equipment behaves consistently, not just once but across repeated trials.
What terms does SIST EN 302 842-2 V1.1.1:2006 define?
- Gaussian Filtered Frequency Shift Keying (GFSK) - The modulation method used by the VDL Mode 4 radio equipment in this part of the standard.
- Automatic Dependent Surveillance - Broadcast (ADS-B) - A broadcast surveillance application supported by the VDL Mode 4 equipment.
- Aeronautical Telecommunication Network (ATN) - The wider aeronautical network context in which VDL Mode 4 acts as an Air/Ground subsystem.
- Open Systems Interconnection (OSI) - The reference model used to organize the VDL Mode 4 system structure.
- Cyclic Redundancy Code (CRC) - The receive-check used to decide whether a burst is valid before it is forwarded upward.
- Compact Position Reporting (CPR) - The position-reporting method defined in clause 5.6 for encoding and decoding position data.
- VHF Digital Link (VDL) - The digital radio link family covered by this standard, operating in the VHF band.
Who uses SIST EN 302 842-2 V1.1.1:2006?
SIST EN 302 842-2 V1.1.1:2006 is used by manufacturers of airborne VDL Mode 4 transmitters, transceivers, and receivers when they design link-layer behavior and prepare equipment for certification. It is also used by test laboratories that have to run protocol tests, timing checks, and burst-processing checks on representative equipment.
Certification bodies and quality teams use it to check compatibility with ICAO VDL SARPs and the ICAO VDL4 Technical Manual. Buyers and system integrators use it to decide whether a product supports broadcast-only, point-to-point-only, or combined operation, and whether it fits airborne mobile use.
Which standards are used with SIST EN 302 842-2 V1.1.1:2006?
- ICAO VDL SARPs [2] - Provides the VDL Mode 4 aeronautical requirements that this document is designed to align with.
- ICAO VDL4 Technical Manual [1] - Provides the technical basis for the VDL Mode 4 procedures and link-layer structure.
- ICAO ATN SARPs [8] - Defines the Aeronautical Telecommunication Network context in which VDL Mode 4 operates as an Air/Ground subsystem.
- EN 302 842-1 [4] - Covers the physical layer tests for VDL Mode 4 equipment.
- EN 302 842-3 [9] - Covers the full ADS-B message set and other broadcast applications not addressed in this part.
- EN 302 842-4 [10] - Covers detailed point-to-point communication requirements and the ATN interface.
- EN 301 842 [13] - The equivalent specification for ground stations.
- ISO/IEC 9646 - Provides the test-suite structure used in Annex B.
What does the SIST EN 302 842-2 V1.1.1:2006 document contain?
The document contains the system description for VDL Mode 4 mobile stations, followed by the minimum performance specification and the detailed design and test requirements. It includes burst formats, parameter definitions, access procedures, timing rules, and the handling of received transmissions.
It also contains protocol specifications for several access and broadcast modes, including reserved access, random access, periodic broadcast, incremental broadcast, directed request, response, and block reservation. These sections are the practical heart of the standard for implementation work.
The test sections provide standard conditions, a required test rig, and detailed protocol test cases. Those test cases use repeated transmissions and statistical checks to show whether the station behaves within the expected slot-selection and reservation patterns.
Annex B describes how the protocol tests are structured as ISO/IEC 9646 test-suites. That helps laboratories turn the standard’s behavior rules into repeatable conformance scripts.
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Frequently Asked Questions
SIST EN 302 842-2 V1.1.1:2006 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF air-ground and air-air Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for aeronautical mobile (airborne) equipment; Part 2: General description and data link layer". This standard covers: The present document provides part 2 of the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4 aeronautical mobile (airborne) radio transmitters, transceivers and receivers for air-ground and air-air 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 VDL SARPs [2]. The present document is designed to ensure that equipment certified to it will be compatible with the relevant ICAO VDL SARPs [2] and ICAO VDL4 Technical Manual [1]. NOTE: In clause 5.1.4, Tertiary time, as described by the ICAO VDL4 Technical Manual [1], has not been included as a requirement in the present document due to the opinion of the ETSI Working Group that insufficient evidence was available to be able to verify correct operation of a "floating network" of stations operating on tertiary time. Manufacturers should note that in future the tuning range for the transmitter may also cover any 25 kHz channel from 112,000 MHz to 117,975 MHz and the receiver(s) may cover any 25 kHz channel from 108,000 MHz to 117,975 MHz. The present document applies to "aeronautical mobile (airborne and in some cases ground vehicles)" equipment which will hereinafter be referred to as "mobile" equipment. The scope of the present document is limited to mobile stations. The equivalent specification for ground stations is EN 301 842 [13]. The VDL Mode 4 system provides digital communication exchanges between aircraft and ground based systems and other aircraft supporting surveillance and communication applications. The supported modes of communication include: • broadcast and point-to-point communication; • broadcast services including Automatic Dependent Surveillance - Broadcast (ADS-B), Traffic Information Service - Broadcast (TIS-B), Flight Information Service - Broadcast (FIS-B) capabilities and GNSS Augmentation Service - Broadcast (GNS-B); • air-air and ground-air services; • operation without ground infrastructure. VDL Mode 4 is designed to be an Air/Ground subsystem of the Aeronautical Telecommunication Network (ATN) (see ICAO ATN SARPs [8]) using the AM(R)S band and it is organized according to the Open Systems Interconnection (OSI) model (defined by ISO). It provides reliable sub network services to the ATN system. Other networks can also be supported but have not been the focus of the present document. The present document is derived from the standards and specifications in: • ICAO VDL4 Technical Manual [1] produced under the auspices of the International Civil Aviation Organization (ICAO). • Other relevant standards as defined in clause 2. It is envisaged that manufacturers may provide equipment supporting: • broadcast services only; • point-to-point services only; • both broadcast and point-to-point services. EN 302 842-1 [4] deals with tests of the physical layer. The present document defines the core link layer requirements for the VDL Mode 4 mobile station necessary to support all types of equipment. This includes a simple position broadcast functionality. The present document deals with tests of the link layer sufficient to support core link layer functionality, and it also includes requirements and tests sufficient to recognize and respond to transmissions associated with point-to-point communication. The present document does not address requirements for the full ADS-B message set, or for other broadcast applications that can be supported by the VDL Mode 4 equipment. These are covered by EN 302 842-3 [9]. Detailed requirements for point-to-point communication are beyond the scope of the present document, but can be found in EN 302 842-4 [10]. EN 302 842-4 [10] also includes the interface to the Aeronautical Telecommunication Network (ATN) as defined in ICAO ATN SARPs [8].
The present document provides part 2 of the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4 aeronautical mobile (airborne) radio transmitters, transceivers and receivers for air-ground and air-air 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 VDL SARPs [2]. The present document is designed to ensure that equipment certified to it will be compatible with the relevant ICAO VDL SARPs [2] and ICAO VDL4 Technical Manual [1]. NOTE: In clause 5.1.4, Tertiary time, as described by the ICAO VDL4 Technical Manual [1], has not been included as a requirement in the present document due to the opinion of the ETSI Working Group that insufficient evidence was available to be able to verify correct operation of a "floating network" of stations operating on tertiary time. Manufacturers should note that in future the tuning range for the transmitter may also cover any 25 kHz channel from 112,000 MHz to 117,975 MHz and the receiver(s) may cover any 25 kHz channel from 108,000 MHz to 117,975 MHz. The present document applies to "aeronautical mobile (airborne and in some cases ground vehicles)" equipment which will hereinafter be referred to as "mobile" equipment. The scope of the present document is limited to mobile stations. The equivalent specification for ground stations is EN 301 842 [13]. The VDL Mode 4 system provides digital communication exchanges between aircraft and ground based systems and other aircraft supporting surveillance and communication applications. The supported modes of communication include: • broadcast and point-to-point communication; • broadcast services including Automatic Dependent Surveillance - Broadcast (ADS-B), Traffic Information Service - Broadcast (TIS-B), Flight Information Service - Broadcast (FIS-B) capabilities and GNSS Augmentation Service - Broadcast (GNS-B); • air-air and ground-air services; • operation without ground infrastructure. VDL Mode 4 is designed to be an Air/Ground subsystem of the Aeronautical Telecommunication Network (ATN) (see ICAO ATN SARPs [8]) using the AM(R)S band and it is organized according to the Open Systems Interconnection (OSI) model (defined by ISO). It provides reliable sub network services to the ATN system. Other networks can also be supported but have not been the focus of the present document. The present document is derived from the standards and specifications in: • ICAO VDL4 Technical Manual [1] produced under the auspices of the International Civil Aviation Organization (ICAO). • Other relevant standards as defined in clause 2. It is envisaged that manufacturers may provide equipment supporting: • broadcast services only; • point-to-point services only; • both broadcast and point-to-point services. EN 302 842-1 [4] deals with tests of the physical layer. The present document defines the core link layer requirements for the VDL Mode 4 mobile station necessary to support all types of equipment. This includes a simple position broadcast functionality. The present document deals with tests of the link layer sufficient to support core link layer functionality, and it also includes requirements and tests sufficient to recognize and respond to transmissions associated with point-to-point communication. The present document does not address requirements for the full ADS-B message set, or for other broadcast applications that can be supported by the VDL Mode 4 equipment. These are covered by EN 302 842-3 [9]. Detailed requirements for point-to-point communication are beyond the scope of the present document, but can be found in EN 302 842-4 [10]. EN 302 842-4 [10] also includes the interface to the Aeronautical Telecommunication Network (ATN) as defined in ICAO ATN SARPs [8].
SIST EN 302 842-2 V1.1.1:2006 is classified under the following ICS (International Classification for Standards) categories: 33.060.99 - Other equipment for radiocommunications; 33.100.01 - Electromagnetic compatibility in general; 49.090 - On-board equipment and instruments. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 302 842-2 V1.1.1:2006 is associated with the following European legislation: Standardization Mandates: M/318. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 302 842-2 V1.1.1:2006 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2006
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP (50 ±
5DGLMVNDRSUHPD]DGLJLWDOQRSRYH]DYR9+) 9'/ ]UDNWODLQ]UDN]UDNQDþLQ±
7HKQLþQHNDUDNWHULVWLNHLQPHULOQHPHWRGH]DDHURQDYWLþQRPRELOQR OHWDOVNR
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Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF air-ground and
air-air Digital Link (VDL) Mode 4 radio equipment; Technical characteristics and methods
of measurement for aeronautical mobile (airborne) equipment; Part 2: General
description and data link layer
Ta slovenski standard je istoveten z: EN 302 842-2 Version 1.1.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
49.090 2SUHPDLQLQVWUXPHQWLY On-board equipment and
]UDþQLKLQYHVROMVNLKSORYLOLK instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
ETSI EN 302 842-2 V1.1.1 (2005-07)
European Standard (Telecommunications series)
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
VHF air-ground and air-air Digital Link (VDL)
Mode 4 radio equipment;
Technical characteristics and
methods of measurement
for aeronautical mobile (airborne) equipment;
Part 2: General description and data link layer
2 ETSI EN 302 842-2 V1.1.1 (2005-07)
Reference
DEN/ERM-TG25-016-5-2
Keywords
aeronautical, digital, radio, testing, VHF
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3 ETSI EN 302 842-2 V1.1.1 (2005-07)
Contents
Intellectual Property Rights.8
Foreword.8
Introduction .9
1 Scope.10
2 References.12
3 Definitions and abbreviations.13
3.1 Definitions.13
3.1.1 Basic reference model definitions.13
3.1.2 Service conventions definitions .13
3.1.3 General definitions.13
3.1.4 Definition of bit order.16
3.2 Abbreviations.16
4 General description of VDL Mode 4 mobile 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.18
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 airborne equipment .22
4.1.8 Classes of equipment .24
4.1.9 Transceiver cross-links.24
4.1.10 Overall structure of specifications for VDL Mode 4 .24
4.1.11 Equipment performance verification .26
5 Minimum performance specification under standard test conditions.27
5.1 MAC sublayer.27
5.1.1 Services.27
5.1.2 MAC sublayer services.27
5.1.3 MAC sublayer parameters .27
5.1.3.1 General.27
5.1.3.2 Parameter M1 (number of slots per superframe).28
5.1.3.3 Parameter M2_inc and M2_limit (MAC layer control parameters for network entry) .28
5.1.3.4 Inspection of m2 filter following transceiver failure.28
5.1.4 Time synchronization.28
5.1.4.1 Primary.28
5.1.4.2 Secondary.29
5.1.4.3 Alignment to UTC second .29
5.1.4.4 Data quality level.29
5.1.5 Slot idle/busy notification.29
5.1.5.1 Slot idle detection.29
5.1.5.2 Slot busy detection .29
5.1.5.3 Slot occupied detection .30
5.1.5.4 Signal level indication.30
5.1.6 Transmission processing.30
5.1.7 Received transmission processing .30
5.2 VSS sublayer.30
5.2.1 Services.30
5.2.1a Multiple access.30
5.2.1.1 Error detection.31
5.2.1.2 Channel congestion.31
5.2.2 Burst format.31
5.2.2.1 VSS burst structure.31
ETSI
4 ETSI EN 302 842-2 V1.1.1 (2005-07)
5.2.2.2 Version number.32
5.2.2.3 Source address.32
5.2.2.4 Message ID.32
5.2.2.5 Information field.32
5.2.2.6 Reservation fields.33
5.2.2.7 Autonomous/directed flag.33
5.2.3 VSS sublayer parameters .34
5.2.3.1 General.34
5.2.3.2 Parameter VS1 (number of ground quarantined slots) .34
5.2.3.3 Parameter VS2 (minimum CCI performance).35
5.2.3.4 Parameter VS4 (quarantine slot re-use range).35
5.2.3.5 Parameter VS5 (maximum burst length).35
5.2.4 VSS quality of service parameters.35
5.2.4.1 General.35
5.2.4.2 Parameter Q1 (priority) .36
5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) .36
5.2.4.4 Parameter Q3 (replace queued data) .37
5.2.4.5 Parameter Q4 (number of available slots).37
5.2.5 Received transmission processing .37
5.2.6 Reserved access protocol specification.38
5.2.6.1 Reservation table.38
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
5.2.6.5 Transmission conflicts for mobile stations.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.43
5.2.8 Void.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 .44
5.2.10.1 Periodic broadcast reservation burst format.44
5.2.10.2 Periodic broadcast timers.44
5.2.10.3 Periodic broadcast parameters.45
5.2.10.4 Periodic broadcast reception procedures.46
5.2.10.5 Periodic broadcast transmission procedures.47
5.2.11 Incremental broadcast protocol specification .49
5.2.11.1 Incremental broadcast reservation burst format .49
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.52
5.2.14 Unicast request protocol specification .52
5.2.14.1 Unicast request reservation burst format.52
5.2.14.2 Unicast request reception procedures.53
5.2.14.3 Slot selection criteria for unicast request with sdf = 1 .53
5.2.15 Information transfer request protocol specification .53
5.2.15.1 Information transfer request reservation burst format.53
5.2.15.2 Information transfer request reception procedures.54
5.2.16 Directed request protocol specification.54
5.2.16.1 Directed request reservation burst format .54
5.2.16.2 Directed request parameters.58
5.2.16.3 Directed request reception procedures .58
5.2.16.4 Directed request transmission procedures.59
5.2.17 Block reservation protocols specification.60
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5.2.17.1 Superframe block reservation burst format .60
5.2.17.2 Second frame block reservation burst format.61
5.2.17.3 Superframe block reservation parameters .62
5.2.17.4 Superframe block reservation reception procedures .62
5.2.17.5 Second frame block reservation parameters.64
5.2.17.6 Second frame block reservation reception procedures.64
5.2.17.7 Void.65
5.2.17.7a Procedures for responding to a rebroadcast request for superframe block reservation .65
5.2.18 Response protocol specification .65
5.2.18.1 Response burst format.65
5.2.19 General request protocol specification.65
5.2.19.1 General request burst format.65
5.2.19.2 General request procedures .66
5.2.20 General response protocol specification .67
5.2.20.1 General response burst format.67
5.2.20.2 General response procedures.68
5.3 DLS sublayer.68
5.3.1 Services.68
5.3.1.1 General.68
5.3.1.2 Data transfer.68
5.3.1.3 Station address encoding.69
5.3.1.4 DLS burst formats.70
5.3.2 DLS system parameters.71
5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) .71
5.3.3 DLS procedures.71
5.3.3.1 Broadcast.71
5.3.3.2 DLS not supported.71
5.3.3.3 User data packet reception .71
5.3.3.4 CTRL DLPDU.72
5.4 Link Management Entity (LME) sublayer .72
5.4.1 Services.72
5.4.2 Synchronization burst format.72
5.4.2.1 General.72
5.4.2.2 Fixed and variable data fields.72
5.4.2.3 Fixed data field format .73
5.4.2.4 Variable data field format .76
5.4.2.5 Synchronization burst request .76
5.4.2.6 Broadcast link management burst .76
5.4.3 Control (CTRL) parameter formats .77
5.4.3.1 Encoding.77
5.4.3.2 VDL Mode 4 parameter identification .77
5.4.3.3 Ground-initiated modification parameters .78
5.4.3.4 Ground-initiated information parameters.80
5.4.4 LME procedures.82
5.4.4.1 Synchronization burst procedures .82
5.4.4.2 Peer Entity Contact Table (PECT).84
5.4.4.3 Network entry protocol specifications .85
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.91
5.5 Void.91
5.6 Definitions for Compact Position Reporting .91
5.6.1 Introduction.91
5.6.2 Parameter symbols, data types, constants and variables .91
5.6.2.1 Parameter symbols.91
5.6.2.2 Data types.92
5.6.2.3 Constants.92
5.6.2.4 Variables.92
5.6.2.5 Functions.93
5.6.2.6 Patch constants.94
5.6.3 Fixed data field position encoding.96
5.6.3.1 General.96
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5.6.3.2 Input parameters.96
5.6.3.3 Calculations.96
5.6.4 Fixed data field position local decoding .97
5.6.4.1 General.97
5.6.4.2 Input parameters.97
5.6.4.3 Calculations.97
5.6.5 Fixed data field position global decoding.98
5.6.5.1 General.98
5.6.5.2 Input parameters.98
5.6.5.3 Transition level straddling.99
5.6.5.4 Calculations.99
5.6.6 Position Report Processing .100
5.6.6.1 Services.100
5.6.6.2 Position report parameters.100
5.6.6.3 Position report processing procedures.101
6 General design requirements.103
6.1 Controls and indicators.103
6.2 Warm up.103
6.3 Airworthiness.103
6.4 Intended function.103
6.5 International Telecommunications Union regulations.103
6.6 Fire protection.103
6.7 Operation of controls.103
6.8 Accessibility of controls.103
6.9 Effects of tests .103
6.10 Failure of the VDL Mode 4 equipment .103
6.11 Software management.103
6.12 Transceiver configuration.103
6.13 Provision for multiple redundant VDL4 transceivers.104
6.14 Reception capability.104
6.15 Transmission capability.104
6.16 Monitoring of proper operation .104
6.17 Power-up self test .104
7 Protocol test procedures.104
7.1 General.104
7.1.1 Input voltage.104
7.1.2 Power input frequency.104
7.1.3 Adjustment of equipment.104
7.1.4 Equipment configuration.104
7.1.5 Test equipment precautions .105
7.1.6 Ambient conditions.105
7.1.7 Connected loads.105
7.2 Required test rig .105
7.3 Protocol test-suite description methodology .107
7.4 Detailed protocol test procedures .108
7.4.1 Test-suite overview.108
7.4.2 Declarations.115
7.4.3 Constraints.115
7.4.3.1 Abbreviations.115
7.4.3.1.1 Subfield mnemonics.115
7.4.3.1.2 Special characters used in the subfield definitions .116
7.4.3.1.3 Station addresses and positions .116
7.4.3.1.4 Tables of values for use in CPR test cases .117
7.4.3.1.5 Tables of values for use in content checking test cases .129
7.4.3.1.6 VDL4 burst formats.132
7.4.3.2 Test cases.154
7.4.3.2.1 Test case macros.155
7.4.3.2.2 Test case descriptions .157
Annex A (informative): Cross reference matrix .376
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Annex B (informative): Description of ISO/IEC 9646 test methodology .393
B.1 Overview of the structure of the ISO/IEC 9646 test-suites.393
B.2 The test case description.393
B.3 The queue action .395
B.4 The repeat construct .395
B.5 Macro definitions.396
B.6 Test case naming.396
Annex C (informative): Bibliography.397
History .403
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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 2 of a multi-part deliverable covering the VHF air-ground and air-air Digital Link (VDL)
Mode 4 radio equipment; Technical characteristics and methods of measurement for aeronautical mobile (airborne)
equipment, as identified below:
Part 1: "Physical layer";
Part 2: "General description and data link layer";
Part 3: "Additional broadcast aspects";
Part 4: "Point-to-point functions".
The present document is accompanied by an equivalent ground-based standard, EN 301 842 [13] parts 1 to 4, covering
the VHF air-ground Data Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement
for ground-based equipment.
NOTE: Minimum Operational Performance Specifications (MOPS) are also being developed for VDL Mode 4.
EUROCAE have previously published Interim MOPS for VDL Mode 4 (see bibliography) which are a
sub set of EN 302 842-1, 2, 3 and 4. EN 302 842-1, 2, 3 and 4 complies with the requirements of CEC
Mandate M/318.
National transposition dates
Date of adoption of this EN: 22 July 2005
Date of latest announcement of this EN (doa): 31 October 2005
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 April 2006
Date of withdrawal of any conflicting National Standard (dow): 30 April 2006
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9 ETSI EN 302 842-2 V1.1.1 (2005-07)
Introduction
The present document states the technical specifications for Very High Frequency (VHF) Digital Link (VDL) Mode 4
aeronautical mobile (airborne) radio transmitters, transcei
...