ETSI EN 301 842-2:2002
Electromagnetic Compatibility and Radio Spectrum Matters (ERM); VHF Air-Ground Data Link (VDL) Mode 4 Radio Equipment; Technical Characteristics and Methods of Measurement for Ground-Based Equipment; Part 2: Data Link Layer (V1.2.1)

Standard No.

ETSI EN 301 842-2:2002

Release Date

2002

Published By

ETSI - European Telecommunications Standards Institute

Status

Be replaced 2014-04

Replace By

ETSI EN 301 842-2:2003

Latest

ETSI EN 301 842-2:2015

Scope

"The present document states the minimum performance requirements for radio transmitters@ receivers and transceivers for ground-based VHF Datalink mode 4 (VDL mode 4) equipment intended to be used for air-ground data communications@ operating in the VHF band (117@95 MHz to 137 MHz and optionally 113 MHz to 117@95 MHz) allocated to the aeronautical mobile service. It 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) and VDL Mode 4 Technical Manual (TM) [1]. Manufacturers should note that in the future@ all or part of the frequency band 108@000 MHz to 117@975 MHz might become available for aeronautical communications. The present document applies to Gaussian-filtered Frequency Shift Keying (GFSK) systems@ with channel separations of 25 kHz intended for air-ground communications. The scope of the present document is limited to ground base stations. The VDL system provides data communication exchanges between aircraft and ground based systems supporting surveillance applications. The supported modes of communication include: ? broadcast and point-to-point communication; ? air-air and ground-air; ? operation without ground infrastructure. VDL Mode 4 is designed to be an Air/Ground subsystem of the Aeronautical Telecommunication Network (ATN) 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. The present document specifies functional specifications of radio transmitters@ receivers and transceivers at ground-based VHF communication equipment intended to be used for air-ground and air-air data communications. The present document is derived from the specifications: ? Mode 4 standards produced under the auspices of the International Civil Aviation Organization (ICAO) [1]. ? Other relevant standards as defined in clause 2. EN 301 842-1 [4] deals with tests of the physical layer. The present document deals with tests of the link layer sufficient to support broadcast functionality. The present document also includes requirements and tests sufficient to recognize and respond to transmissions associated with point-to-point communication. Detailed requirements for point-to-point communication are beyond the scope of the present document. The present document includes: ? references@ definitions@ abbreviations and symbols are provided in clauses 2 and 3; ? clause 4 describes the VDL Mode 4 ground station link layer; ? clause 5 performance specifications for the VDL Mode 4 ground station; ? clause 6 provides general design requirements; ? clause 7 provide protocol tests which emphasis the ADS-B functions of the system; ? a document history is contained in clause 8; ? clause A provides a detailed cross-reference to the relevant requirements contained in reference [1]; ? annex B provides a description of the ISO/IEC 9646 [7] Test Methodology Note that the system can support a very wide range of functions. It is not practical to provide specific tests for all aspects of functionality. The approach used is to provide detailed tests for the core ADS-B functionality and to provide tests of those remaining requirements which@ if wrongly implemented@ could cause a deterioration in the service offered by other VDL Mode 4 stations. Therefore: ? a detailed set of protocol tests are provided for the broadcast functionality necessary to support ADS-B functions; ? a detailed test of position encoding and decoding is provided because of the importance of position in the management of the VDL Mode 4 link specifically and the need to support ADS-B applications in general. Mandating and recommendation phrases a) ""Shall"": the use of the word ""Shall"" indicates a mandated criterion; i.e. compliance with the particular procedure or specification is mandatory and no alternative may be applied. b) ""Should"": the use of the word ""Should"" (and phrases such as ""It is recommended that...""@ etc.) indicates that though the procedure or criterion is regarded as the preferred option@ alternative procedures@ specifications or criteria may be applied@ provided that the manufacturer@ installer or tester can provide information or data to adequately support and justify the alternative"

ETSI EN 301 842-2:2002 history

• 2015 ETSI EN 301 842-2:2015 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 (V1.7.1)
• 2014 ETSI EN 301 842-2:2014 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 (V1.7.0)
• 2011 ETSI EN 301 842-2:2011 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 (V1.6.1)
• 2010 ETSI EN 301 842-2:2010 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 (V1.6.1)
• 2006 ETSI EN 301 842-2:2006 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 2: General description and data link layer (V1.
• 2005 ETSI EN 301 842-2:2005 Electromagnetic compatibility and Radio spectrum Matters (ERM); VHF air-ground Data Link (VDL) Mode 4 radio equipment; Technical characteristics and methods of measurement for ground-based equipment; Part 2: Data link layer (V1.4.1)
• 2004 ETSI EN 301 842-2:2004 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 2: General description and data link layer (V1.
• 2003 ETSI EN 301 842-2:2003 Electromagnetic Compatibility and Radio Spectrum Matters (ERM); VHF Air-Ground Data Link (VDL) Mode 4 Radio Equipment; Technical Characteristics and Methods of Measurement for Ground-Based Equipment; Part 2: Data Link Layer (V1.2.1)
• 2002 ETSI EN 301 842-2:2002 Electromagnetic Compatibility and Radio Spectrum Matters (ERM); VHF Air-Ground Data Link (VDL) Mode 4 Radio Equipment; Technical Characteristics and Methods of Measurement for Ground-Based Equipment; Part 2: Data Link Layer (V1.2.1)
• 2001 ETSI EN 301 842-2:2001 Electromagnetic Compatibility and Radio Spectrum Matters (ERM); VHF Air-Ground Data Link (VDL) Mode 4 Radio Equipment; Technical Characteristics and Methods of Measurement for Ground-Based Equipment; Part 2: Data Link Layer (V1.1.1)