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GB/T 45308-2025: Railway applications - Rolling stock - Technical requirements for network time synchronization
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| GB/T 45308-2025 | English | 359 |
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Railway applications - Rolling stock - Technical requirements for network time synchronization
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GB/T 45308-2025
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Basic data | Standard ID | GB/T 45308-2025 (GB/T45308-2025) | | Description (Translated English) | Railway applications - Rolling stock - Technical requirements for network time synchronization | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | S30 | | Classification of International Standard | 45.060 | | Word Count Estimation | 18,139 | | Date of Issue | 2025-02-28 | | Date of Implementation | 2025-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 45308-2025: Railway applications - Rolling stock - Technical requirements for network time synchronization
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GB/T 45308-2025 English version. Railway applications - Rolling stock - Technical requirements for network time synchronization
ICS 45.060
CCSS30
National Standard of the People's Republic of China
Rail transit locomotives and vehicles
Network time synchronization technical requirements
Released on 2025-02-28
2025-09-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Abbreviations 2
5 Technical Requirements 3
6 Performance Testing 7
Reference 10
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is proposed by the National Railway Administration.
This document is under the jurisdiction of the National Rail Transit Electrical Equipment and System Standardization Technical Committee (SAC/TC278).
This document was drafted by. CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., China Railway Certification and Inspection Zhuzhou Traction Electrical Equipment Inspection Station Co., Ltd.
Company, China Academy of Railway Sciences Group Co., Ltd. Locomotive and Rolling Stock Research Institute, CRRC Qingdao Sifang Locomotive and Rolling Stock Co., Ltd., CRRC
Zhuzhou Electric Locomotive Co., Ltd. and CRRC Tangshan Locomotive and Rolling Stock Co., Ltd.
The main drafters of this document are. Liu Haitao, Zhou Xuexun, Shen Hui, Hao Bo, Cai Wanyin, Ye Pengdi, Ma Guodong, Ye Feng, Ji Yun.
Rail transit locomotives and vehicles
Network time synchronization technical requirements
1 Scope
This document specifies the technical requirements and performance tests for network time synchronization of rail transit locomotives and vehicles.
This document applies to rail transit locomotive and vehicle train communication network (TCN) equipment.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 17737.1 Coaxial communication cables Part 1.General specification General principles, definitions and requirements
GB/T 24338.4 Rail transit electromagnetic compatibility Part 3-2.Rolling stock equipment
GB/T 25119 Rail transit rolling stock electronic devices
GB/T 28029.1-2020 Rail transit electronic equipment Train communication network (TCN) Part 1.Basic structure
GB/T 28029.9-2020 Rail transit electronic equipment Train communication network (TCN) Part 3-1.Multi-function vehicle bus
(MVB)
GB/T 28029.12-2020 Rail transit electronic equipment Train communication network (TCN) Part 3-4.Ethernet marshaling network
(ECN)
GB/T 37943-2019 Beidou satellite timing terminal test method
TB/T 1484.3-2017 Rolling Stock Cables Part 3.Communication Cables
JJF(Communication)018-2021 Calibration Specification for Time Integrated Tester
3 Terms and definitions
The terms and definitions defined in GB/T 28029.1-2020 and the following apply to this document.
3.1
timereference
The standard time is based on Beidou time as the initial time reference and atomic time as the time unit (s).
3.2
timeaccuracy
The degree of agreement between a local clock and a time reference measured over a certain time interval.
Note. It is expressed as the absolute value of time deviation.
3.3
Time accuracy localtimeaccuracy
The degree of consistency between the local clock and the time reference measured within a specified time interval in the punctual state.
Note. It is expressed as the absolute value of time deviation.
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