SIST EN 302 842-2 V1.2.1:2007
(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 applies to the following radio equipment types: - 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 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 [2] and ICAO VDL4 Technical Manual [1] and with the SES 552/2004 interoperability Regulation. 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 [15]. 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.
- Status
- Published
- Publication Date
- 28-Feb-2007
- Technical Committee
- MOC - Mobile Communications
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Mar-2007
- Due Date
- 01-Mar-2007
- Completion Date
- 01-Mar-2007
- Mandate
- M/318
SIST EN 302 842-2 V1.2.1:2007 is the Slovenian adoption of EN 302 842-2 Version 1.2.1 for VHF air-ground and air-air Digital Link (VDL) Mode 4 airborne radio equipment. It specifies the general description and the data link layer for airborne aeronautical mobile equipment, so manufacturers, test labs and certifiers can check how the radio behaves on the air interface and in link management.
The standard is aimed at VHF airborne transmitters, transceivers and receivers that use Gaussian Filtered Frequency Shift Keying (GFSK) with 25 kHz channel spacing. It is written so equipment can interwork with the ICAO VDL SARPs, the ICAO VDL4 Technical Manual and the SES 552/2004 interoperability Regulation.
What does SIST EN 302 842-2 V1.2.1:2007 specify?
SIST EN 302 842-2 V1.2.1:2007 specifies the airborne, mobile part of VDL Mode 4 and limits that scope to mobile stations. The document covers VHF air-ground and air-air communications, including broadcast and point-to-point services, and the equivalent ground-station specification is EN 301 842 [15].
The scope ties the equipment to the VHF band and to channels from 118.000 MHz to 136.975 MHz, in 25 kHz steps. It also notes that the system can work without ground infrastructure, which matters for aircraft-to-aircraft services and for applications such as surveillance and communication exchange.
The document is organized into:
- Clause 1 - Scope
- Clause 2 - References
- Clause 3 - Definitions and abbreviations
- Clause 4 - General description of the VDL Mode 4 mobile station link layer
- Clause 5 - Minimum performance specification under standard test conditions
- Clause 6 - General design requirements
- Clause 7 - Protocol test procedures
- Annex B - ISO/IEC 9646 test-suite structure and related test-case material
The scope note also states that tertiary time from the ICAO VDL4 Technical Manual is not included as a requirement here. That matters if you are checking whether a design or test plan should include tertiary time behavior.
What are the key requirements of SIST EN 302 842-2 V1.2.1:2007?
SIST EN 302 842-2 V1.2.1:2007 defines the behavior of the mobile station link layer in enough detail to support interoperable airborne equipment. The most important requirements are in Clause 5, with supporting design rules in Clause 6 and conformance checks in Clause 7.
Data link timing, access and reception
Clause 5.1 describes the MAC sublayer behavior. The MAC sublayer acquires the shared communication path, accepts continuous indication from the physical layer, forwards received burst data and passes transmission requests and status to and from the VSS sublayer. In practice, this means the timing between the radio hardware and the protocol software must be tight and deterministic.
Clause 5.1.3 introduces MAC parameters such as M1, M2_inc and M2_limit. These parameters control slot structure and network entry behavior, so implementers need to match them when they size buffers, schedule transmissions or verify entry logic.
Clause 5.1.4 defines time synchronization, including primary and secondary time, alignment to the UTC second and data quality level. The practical point is that the station must keep a usable network time reference, because the whole access method depends on slot timing.
Clause 5.1.6 requires transmissions to start only at the slot boundary, with delayed bursts beginning 4 ms after the start of the slot if the slot is still idle at that point. Clause 5.1.7 requires bursts with invalid Cyclic Redundancy Code (CRC) to be discarded. In practice, this protects slot sharing and ensures that bad frames do not propagate upward.
Burst formats, reservation handling and service types
Clause 5.2 defines the VSS sublayer services, burst structure and access protocols. The VSS burst structure includes the version number, source address, message ID, information field, reservation fields and the autonomous/directed flag. That is the core on-air format that interoperable equipment has to create and parse.
Clause 5.2 then covers several access and service modes, including reserved access, random access, null reservation, periodic broadcast, incremental broadcast, BND broadcast, unicast request, information transfer request, directed request, block reservation, response, general request and general response. For a manufacturer, this means the radio is not just sending data - it also has to reserve slots, interpret reservation conflicts, and follow the correct procedure for each service type it supports.
Clause 5.2.3 and Clause 5.2.4 define system parameters and quality-of-service parameters such as VS1, VS2, VS4, VS5, Q1, Q2a to Q2d, Q3 and Q4. These govern quarantined slots, minimum CCI performance, burst length, priority, slot-selection range, queued-data replacement and available slots. In practice, these parameters determine whether the station behaves fairly on a busy channel and whether it avoids collisions.
Clause 5.2.20 and 5.2.21 give the general response and retransmission behavior, including error types such as unsupported function, out of resources and terrestrial network errors. This matters for implementation because the equipment has to react predictably when a request cannot be fulfilled.
Data link services, management and reporting
Clause 5.3 defines the DLS sublayer. It covers station address encoding, DLS burst formats, the ND4 parameter for maximum UDATA burst length, and procedures for broadcast, unsupported DLS operation, user data packet reception and CTRL DLPDU handling. This is the part that carries user data cleanly through the link layer.
Clause 5.4 defines the Link Management Entity (LME) sublayer. It requires support for broadcast services and defines synchronization burst formats, fixed and variable data fields, control parameter formats, peer contact information and network entry procedures. The clause also includes additional material for ADS-B applications, so the document supports both link management and airborne broadcast use cases.
Clause 5.4.3 assigns application-field ranges, including allocations for broadcast services and private or ICAO use. That is important when integrating higher-layer applications, because it keeps application identifiers from overlapping.
Clause 5.6 defines Compact Position Reporting and the associated parameter symbols, data types, constants, functions and decoding procedures. In practice, this section is used when equipment must encode, decode and process position reports correctly, including local and global decoding and transition-level handling.
General design and test obligations
Clause 6 collects general design requirements for controls and indicators, warm up, airworthiness, intended function, ITU regulations, fire protection, control operation and accessibility, failure behavior, software management, transceiver configuration, redundancy, reception and transmission capability, monitoring of proper operation and power-up self test. These requirements matter because conformance is not only about protocol bits - the product also has to be practical, operable and maintainable in an airborne environment.
Clause 7 turns the specification into testable procedures. It covers input voltage, power input frequency, equipment adjustment and configuration, precautions, ambient conditions, connected loads, the required test rig and a detailed test-suite methodology. That is what labs and certification teams use to show that an implementation matches the standard under defined conditions.
What terms does SIST EN 302 842-2 V1.2.1:2007 define?
SIST EN 302 842-2 V1.2.1:2007 defines the vocabulary needed to describe the link layer, burst formats and reporting behavior.
- Automatic Dependent Surveillance-Broadcast (ADS-B) - a broadcast surveillance service supported by the system for transmitting aircraft position-related information.
- Aeronautical Telecommunication Network (ATN) - the broader aeronautical network system that VDL Mode 4 is intended to support as an air-ground subsystem.
- Link Management Entity (LME) - the sublayer that handles synchronization bursts, broadcast support, network entry and control parameters.
- Required Navigation Performance (RNP) - the navigation performance class used in the synchronization burst position and integrity coding.
- synchronization burst (sync burst) - the burst used for timing and position synchronization and for link management exchanges.
- VHF Digital Link (VDL) Mode 4 - the VHF digital communications mode used for air-ground and air-air data exchange.
- Cyclic Redundancy Code (CRC) - the error-checking code used to validate received bursts before forwarding them upward.
Who uses SIST EN 302 842-2 V1.2.1:2007?
SIST EN 302 842-2 V1.2.1:2007 is used by manufacturers of airborne VDL Mode 4 radio transmitters, transceivers and receivers, because it defines the air interface and the link-layer behavior those products must implement. It is also used by avionics integrators who need to connect the radio to aircraft systems that provide position, control or broadcast data.
Test laboratories and certification teams use it to build protocol test cases, set up the required test rig and check timing, burst formatting and error handling. Quality managers and buyers use it to compare products on a common technical basis when they need airborne equipment for ADS-B, broadcast, point-to-point or ATN-related services.
Which standards are used with SIST EN 302 842-2 V1.2.1:2007?
SIST EN 302 842-2 V1.2.1:2007 is tied to several named external documents that shape its scope and behavior.
- ICAO VDL SARPs [2] - defines the VDL Mode 4 channel use and compatibility target, including the tuning range used in this document.
- ICAO VDL4 Technical Manual [1] - provides the technical basis for the system model and procedures the standard follows.
- SES 552/2004 interoperability Regulation - sets the interoperability context the document is designed to meet.
- ICAO ATN SARPs [8] - defines the Aeronautical Telecommunication Network context in which VDL Mode 4 operates.
- EN 301 842 [15] - gives the equivalent specification for ground stations.
- EN 302 842-3 [9] - defines broadcast-service application fields referenced by the LME control parameters.
- EN 302 842-4 [10] - is referenced for a message ID definition used in the burst format rules.
What does the SIST EN 302 842-2 V1.2.1:2007 document contain?
SIST EN 302 842-2 V1.2.1:2007 contains tables, burst formats, parameter definitions, procedures and test cases rather than only high-level requirements. Clause 5 is the largest part and includes the MAC, VSS, DLS and LME behavior, plus Compact Position Reporting calculations and decoding steps.
The document uses tables for parameter values, encodings, reservation types, error codes and slot-selection behavior. Those tables are what implementers use when coding the transmitter, receiver and control logic, and what test engineers use when checking conformity.
Clause 7 contains the protocol test procedures, including the setup conditions, the required rig and detailed step-by-step test cases. Annex B explains the ISO/IEC 9646 test-suite structure, including test case description, queue action, repeat constructs, macro definitions and test case naming.
This means the standard is useful both as a design specification and as a lab procedure document. A reader can use it to understand how VDL Mode 4 mobile stations behave on the channel and how to verify that behavior in testing.
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Frequently Asked Questions
SIST EN 302 842-2 V1.2.1:2007 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 applies to the following radio equipment types: - 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 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 [2] and ICAO VDL4 Technical Manual [1] and with the SES 552/2004 interoperability Regulation. 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 [15]. 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.
The present document applies to the following radio equipment types: - 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 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 [2] and ICAO VDL4 Technical Manual [1] and with the SES 552/2004 interoperability Regulation. 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 [15]. 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.
SIST EN 302 842-2 V1.2.1:2007 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 V1.2.1:2007 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 V1.2.1:2007 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-2007
(OHNWURPDJQHWQD]GUXåOMLYRVWLQ]DGHYHY]YH]L]UDGLMVNLPVSHNWURP (50
5DGLMVNDRSUHPD]DGLJLWDOQRSRYH]DYR9+) 9'/ ]UDNWODLQ]UDN]UDNQDþLQ
7HKQLþQHNDUDNWHULVWLNHLQPHULOQHPHWRGH]DDHURQDYWLþQRPRELOQR OHWDOVNR
RSUHPRGHO 6SORãQLRSLVLQSODVW]DSRGDWNRYQHSRYH]DYH
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 1.2.1
ICS:
33.060.99 Druga oprema za radijske Other equipment for
komunikacije radiocommunications
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
49.090 2SUHPDLQLQVWUXPHQWLY On-board equipment and
]UDþQLKLQYHVROMVNLKSORYLOLK instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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 V1.2.1 (2006-12)
Reference
REN/ERM-TG25-030-2
Keywords
aeronautical, digital, radio, testing, VHF
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ETSI
3 ETSI EN 302 842-2 V1.2.1 (2006-12)
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.17
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.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 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.29
5.1.4 Time synchronization.29
5.1.4.1 Primary.29
5.1.4.2 Secondary.29
5.1.4.3 Alignment to UTC second .30
5.1.4.4 Data quality level.30
5.1.5 Slot idle/busy notification.30
5.1.5.1 Slot idle detection.30
5.1.5.2 Slot busy detection .30
5.1.5.3 Slot occupied detection .30
5.1.5.4 Signal level indication.31
5.1.6 Transmission processing.31
5.1.7 Received transmission processing .31
5.2 VSS sublayer.31
5.2.1 Services.32
5.2.1a Multiple access.32
5.2.1.1 Error detection.32
5.2.1.2 Channel congestion.32
5.2.2 Burst format.33
5.2.2.1 VSS burst structure.33
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4 ETSI EN 302 842-2 V1.2.1 (2006-12)
5.2.2.2 Version number.34
5.2.2.3 Source address.34
5.2.2.4 Message ID.34
5.2.2.5 Information field.35
5.2.2.6 Reservation fields.35
5.2.2.7 Autonomous/directed flag.35
5.2.3 VSS sublayer parameters .36
5.2.3.1 General.36
5.2.3.2 Parameter VS1 (number of ground quarantined slots) .36
5.2.3.3 Parameter VS2 (minimum CCI performance).37
5.2.3.4 Parameter VS4 (quarantine slot re-use range).37
5.2.3.5 Parameter VS5 (maximum burst length).37
5.2.4 VSS quality of service parameters.37
5.2.4.1 General.37
5.2.4.2 Parameter Q1 (priority) .38
5.2.4.3 Parameters Q2a to Q2d (slot selection range constraint for level n) .39
5.2.4.4 Parameter Q3 (replace queued data) .39
5.2.4.5 Parameter Q4 (number of available slots).40
5.2.5 Received transmission processing .40
5.2.6 Reserved access protocol specification.41
5.2.6.1 Reservation table.41
5.2.6.2 Selecting slots for transmission or reservation.42
5.2.6.3 Reserved transmissions.43
5.2.6.4 Reservation conflicts.44
5.2.6.5 Transmission conflicts for mobile stations.44
5.2.7 Random access protocol specification .45
5.2.7.1 General.45
5.2.7.2 Random access parameters.45
5.2.7.3 Random access procedures.47
5.2.8 Void.48
5.2.9 Null reservation protocol specification.48
5.2.9.1 Null reservation burst format .48
5.2.10 Periodic broadcast protocol specification .48
5.2.10.1 Periodic broadcast reservation burst format.48
5.2.10.2 Periodic broadcast timers.49
5.2.10.3 Periodic broadcast parameters.49
5.2.10.4 Periodic broadcast reception procedures.50
5.2.10.5 Periodic broadcast transmission procedures.51
5.2.11 Incremental broadcast protocol specification .54
5.2.11.1 Incremental broadcast reservation burst format .54
5.2.11.2 Incremental broadcast parameters.54
5.2.11.3 Incremental broadcast reception procedures .55
5.2.11.4 Incremental broadcast transmission procedures.55
5.2.12 Combined periodic broadcast and incremental broadcast protocol specification .56
5.2.12.1 Combined periodic broadcast and incremental broadcast reservation burst.56
5.2.13 Big negative dither (BND) broadcast protocol specifications .56
5.2.13.1 BND reservation burst format.56
5.2.13.2 BND broadcast parameters.57
5.2.13.3 BND broadcast reception procedures.57
5.2.13.4 BND broadcast transmission procedures .57
5.2.14 Unicast request protocol specification .57
5.2.14.1 Unicast request reservation burst format.57
5.2.14.1a Unicast request parameters.58
5.2.14.2 Unicast request reception procedures.59
5.2.14.3 Unicast request transmission procedures .60
5.2.15 Information transfer request protocol specification .60
5.2.15.1 Information transfer request reservation burst format.60
5.2.15.2 Information transfer request reception procedures.62
5.2.16 Directed request protocol specification.62
5.2.16.1 Directed request reservation burst format .62
5.2.16.2 Directed request parameters.65
5.2.16.3 Directed request reception procedures .66
ETSI
5 ETSI EN 302 842-2 V1.2.1 (2006-12)
5.2.16.4 Directed request transmission procedures.67
5.2.16.5 Directed request response procedures .68
5.2.17 Block reservation protocols specification.69
5.2.17.1 Superframe block reservation burst format .69
5.2.17.2 Second frame block reservation burst format.70
5.2.17.3 Void.71
5.2.17.4 Superframe block reservation reception procedures .71
5.2.17.5 Second frame block reservation parameters.73
5.2.17.6 Second frame block reservation reception procedures.73
5.2.17.7 Void.73
5.2.17.7a Procedures for responding to a rebroadcast request for superframe block reservation .73
5.2.18 Response protocol specification .74
5.2.18.1 Response burst format.74
5.2.19 General request protocol specification.74
5.2.19.1 General request burst format.74
5.2.19.2 General request procedures .75
5.2.20 General response protocol specification .75
5.2.20.1 General response burst format.75
5.2.20.2 General response procedures.77
5.2.21 Retransmission procedures.77
5.3 DLS sublayer.78
5.3.1 Services.78
5.3.1.1 General.78
5.3.1.2 Data transfer.78
5.3.1.3 Station address encoding.78
5.3.1.4 DLS burst formats.79
5.3.2 DLS system parameters.81
5.3.2.1 Parameter ND4 (maximum length of a UDATA burst) .81
5.3.3 DLS procedures.81
5.3.3.1 Broadcast.81
5.3.3.2 DLS not supported.81
5.3.3.3 User data packet reception .82
5.3.3.4 CTRL DLPDU.82
5.4 Link Management Entity (LME) sublayer .82
5.4.1 Services.82
5.4.2 Synchronization burst format.82
5.4.2.1 General.82
5.4.2.2 Fixed and variable data fields.82
5.4.2.3 Fixed data field format .83
5.4.2.4 Variable data field format .86
5.4.2.5 Synchronization burst request .86
5.4.2.6 Broadcast link management burst .86
5.4.3 Control (CTRL) parameter formats .87
5.4.3.1 Encoding.87
5.4.3.2 VDL Mode 4 parameter identification .87
5.4.3.3 Ground-initiated modification parameters .88
5.4.3.4 Ground-initiated information parameters.91
5.4.3a LME timers and parameters.93
5.4.3a.1 General.93
5.4.3a.2 Counter L1 (maximum number of missed reservations) and Timer TL3 (inter-miss timer).94
5.4.4 LME procedures.94
5.4.4.1 Synchronization burst procedures .94
5.4.4.2 Peer Entity Contact Table (PECT).97
5.4.4.3 Network entry protocol specifications .98
5.4.5 Additional material for ADS-B applications .104
5.4.5.1 Information field formats.104
5.4.5.2 ADS-B request format.105
5.5 Void.105
5.6 Definitions for Compact Position Reporting .105
5.6.1 Introduction.105
5.6.2 Parameter symbols, data types, constants and variables .105
5.6.2.1 Parameter symbols.105
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6 ETSI EN 302 842-2 V1.2.1 (2006-12)
5.6.2.2 Data types.106
5.6.2.3 Constants.106
5.6.2.4 Variables.106
5.6.2.5 Functions.107
5.6.2.6 Patch constants.108
5.6.3 Fixed data field position encoding.110
5.6.3.1 General.110
5.6.3.2 Input parameters.110
5.6.3.3 Calculations.110
5.6.4 Fixed data field position local decoding .111
5.6.4.1 General.111
5.6.4.2 Input parameters.111
5.6.4.3 Calculations.111
5.6.5 Fixed data field position global decoding.112
5.6.5.1 General.112
5.6.5.2 Input parameters.113
5.6.5.3 Transition level straddling.113
5.6.5.4 Calculations.113
5.6.6 Position Report Processing .114
5.6.6.1 Services.114
5.6.6.2 Position report parameters.114
5.6.6.3 Position report processing procedures.115
6 General design requirements.117
6.1 Controls and indicators.117
6.2 Warm up.117
6.3 Airworthiness.117
6.4 Intended function.117
6.5 International Telecommunications Union regulations.117
6.6 Fire protection.118
6.7 Operation of controls.118
6.8 Accessibility of controls.118
6.9 Effects of tests .118
6.10 Failure of the VDL Mode 4 equipment .118
6.11 Software management.118
6.12 Transceiver configuration.118
6.13 Provision for multiple redundant VDL4 transceivers.118
6.14 Reception capability.118
6.15 Transmission capability.118
6.16 Monitoring of proper operation .118
6.17 Power-up self test .118
7 Protocol test procedures.119
7.1 General.119
7.1.1 Input voltage.119
7.1.2 Power input frequency.119
7.1.3 Adjustment of equipment.119
7.1.4 Equipment configuration.119
7.1.5 Test equipment precautions .119
7.1.6 Ambient conditions.119
7.1.7 Connected loads.119
7.2 Required test rig .119
7.3 Protocol test-suite description methodology .122
7.4 Detailed protocol test procedures .122
7.4.1 Test-suite overview.122
7.4.2 Declarations.129
7.4.3 Constraints.129
7.4.3.1 Abbreviations.129
7.4.3.1.1 Subfield mnemonics.129
7.4.3.1.2 Special characters used in the subfield definitions .130
7.4.3.1.3 Station addresses and positions .130
7.4.3.1.4 Tables of values for use in CPR test cases .131
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7.4.3.1.5 Tables of values for use in content checking test cases .143
7.4.3.1.6 VDL4 burst formats.145
7.4.3.2 Test cases.167
7.4.3.2.1 Test case macros.168
7.4.3.2.2 Test case descriptions .170
Annex A (informative): Cross reference matrix .393
Annex B (informative): Description of ISO/IEC 9646 test methodology .411
B.1 Overview of the structure of the ISO/IEC 9646 test-suites.411
B.2 The test case description.411
B.3 The queue action .413
B.4 The repeat construct .413
B.5 Macro definitions.414
B.6 Test case naming.414
Annex C (informative): Bibliography.415
History .421
ETSI
8 ETSI EN 302 842-2 V1.2.1 (2006-12)
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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";
Part 5: "VDL4 airbone equipment in compliance with the SES 552/2004 interoperability Regulation".
The present document is accompanied by an equivalent ground-based standard, EN
...