Standard No.:	GB/T 20851.4-2007/XG1-2012
Chinese Name:	《电子收费 专用短程通信第4部分：设备应用》国家标准第1号修改单
English Name:	Electronic toll collection—Dedicated short range communication—Part 4:Equipment application
Professional Classification:	L65 System equipment interface
ICS Classification:	35.200
Issued by:
Issued on:	2007-04-25
Implemented on:	2012-12-01
Status:	ABOLISHED
Replace By:	GB/T20851.4-2019 Electronic toll collection—Dedicated short range communication—Part 4:Equipment application
Replace By Date:	2019-12-01
Language:	English
File Format:	PDF
Word Count:	20000 words
Price(USD):	600 (USD)
Delivery:	via email in 1-5 business day

1 Scope

This part specifies the general principles, technical requirements, data structures, application interfaces and application security of the dedicated short range communication equipment for electronic toll collection (ETC).
This part is applicable to the electronic toll collection systems for highways, and may also be used for reference by automatic vehicle identification (AVI), vehicle access management, urban road toll collection, etc.

2 Normative References

The following documents contain provisions which, through reference in this part of GB/T 20851, constitute provisions of this part. For dated reference, subsequent amendments to (excluding any corrigendum), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For any undated references, the latest edition of the document referred to applies.
GB/T 2423 Environmental Testing for Electric and Electronic Products
GB 4208 Degrees of Protection Provided by Enclosure (IP Code)
GB/T 20135-2006 Intelligent Transportation Systems - Electronic Toll Collection - System Architecture
GB/T 20839-2007 Intelligent Transportation Systems - General Terminology
GB/T 20851.1-2007 Electronic Toll Collection - Dedicated Short Range Communication - Part 1: Physical Layer
GB/T 20851.2-2007 Electronic Toll Collection - Dedicated Short Range Communication - Part 2: Data Link Layer
GB/T 20851.3-2007 Electronic Toll Collection - Dedicated Short Range Communication - Part 3: Application Layer
JR/T 0025-2005 China Financial Integrated Circuit (IC) Card Specifications
ISO/IEC 7816 Identification Cards - Integrated Circuit Cards - Cards with Contacts
ISO/IEC 14443 Identification Cards - Contactless Integrated Circuit Cards

3 Terms, Definitions and Abbreviations

3.1 Terms and Definitions
For the purposes of this part, the terms and definitions established in GB/T 20135-2006 and GB/T 20839-2007 apply.
3.2 Abbreviations