ISO 4426:2021 PDF

Name: ISO 4426:2021 — Intelligent transport systems — Lower layer protocols for usage in the European digital tachograph
SKU: ISO 4426:2021
Price: 25 EUR
Availability: InStock

Intelligent transport systems — Lower layer protocols for usage in the European digital tachograph

Название (английский):

ISO 4426:2021

Intelligent transport systems — Lower layer protocols for usage in the European digital tachograph

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 67
Дата публикации:: 3 августа 2021 г.
Издание:: ISO IS 4426 edition 1 version 1
ICS:: 03.220.20

Тип поставки:

Full version1 005 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:12 раб. дн. (перевод)

Цена:1 005 €

Описание (английский):

This document specifies communication requirements in support of the Smart Digital Tachograph (SDT) as identified by Regulation 2016/799 of the European Union[23]. The specification covers: — the physical layer at 5,8 GHz for SDT communications (SDTC); — the data link layer (DLL) of SDTC; — the application layer of SDTC; — SDTC profiles which provide coherent sets of communication tools for applications based on SDTC. This document provides further information beneficial for the design and development of SDTC equipment.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 4426:2021 - Intelligent transport systems - Lower layer protocols for usage in the European digital tachograph defines the communication foundations for the Smart Digital Tachograph (SDT) as identified by EU Regulation 2016/799. The standard specifies the SDT Communications (SDTC) stack - covering the physical layer at 5.8 GHz, the data link layer (DLL), the application layer, and coherent SDTC profiles. Normative annexes provide implementation-relevant details and test guidance to support design, development and conformance of SDTC equipment.

Key topics and technical requirements

Physical layer (L1): RF band allocation and carrier frequency considerations at 5.8 GHz, antenna and polarization aspects, incident power limits and E.I.R.P. masks, wake‑up triggers and communication zone definitions.

Data link layer (L2): Medium access, logical link control and framing (preambles, trailing bits), bit rates, data coding (e.g., Manchester/FM0 types referenced), and bit error ratio targets.

Application layer (L7): Message structures and services to support SDT interrogation and exchange between roadside units (RSUs) and on‑board units (OBUs).

SDTC profiles: Bundled sets of communication tools and parameter sets for common SDT applications to ensure interoperable deployments.

Test methods and conformance: Normative annexes define testable parameters and test procedures to validate performance and interoperability.

Definitions and normative references (e.g., ISO 15628 and HDLC procedures) ensure consistent terminology and alignment with existing DSRC standards.

Practical applications

Enabling vehicle-to-infrastructure interrogation of digital tachographs for inspection, enforcement and fleet management.

Guiding manufacturers of OBUs (on‑board units) and RSUs (roadside units) to implement compliant lower‑layer protocols for SDT.

Supporting test laboratories and certification bodies with test parameters and procedures needed for conformity assessment.

Assisting transport authorities and system integrators in designing interoperable roadside systems and deployment profiles.

Who should use ISO 4426:2021

Hardware and firmware engineers designing DSRC/SDTC radio and transponder units

System integrators and solution providers deploying digital tachograph interrogation stations

Test houses and conformity assessors validating SDT communication performance

Regulators, transport authorities and large fleet operators planning compliant inspection infrastructure

Related standards

ISO 4426 builds on and references existing DSRC standards and EN specifications (physical, DLL, application layers) and aligns with ISO 15628 and relevant ETSI/EN test methods to ensure interoperability with the wider DSRC ecosystem.

Keywords: ISO 4426:2021, intelligent transport systems, digital tachograph, Smart Digital Tachograph, SDTC, DSRC, 5.8 GHz, data link layer, application layer, RSU, OBU, SDTC profiles.

ISO 4426:2021 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use ISO 4426:2021

Related standards

Технические детали

ISO 15628:2007

Road transport and traffic telematics — Dedicated short range communication (DSRC) — DSRC application layer

ISO 8689-1:2000

Water quality — Biological classification of rivers — Part 1: Guidance on the interpretation of biological qu…

ISO/ASTM51540-04(2012)

Standard Practice for Use of a Radiochromic Liquid Dosimetry System (Withdrawn 2020)

ISO/ASTM51204-04

Standard Practice for Dosimetry in Gamma Irradiation Facilities for Food Processing (Withdrawn 2013)

ISO/ASTM51431-05

Standard Practice for Dosimetry in Electron Beam and X-Ray (Bremsstrahlung) Irradiation Facilities for Food P…

ISO/ASTM52628-20e1

Standard Practice for Dosimetry in Radiation Processing

ISO/ASTM52921-13(2019)

Standard Terminology for Additive Manufacturing—Coordinate Systems and Test Methodologies

ISO/ASTMTR52917-EB

Additive Manufacturing — Round Robin Testing — General Guidelines