标准编号:	GB/T 20851.4-2019
中文名称:	电子收费 专用短程通信 第4部分：设备应用
英文名称:	Electronic toll collection—Dedicated short range communication—Part 4:Equipment application
中标分类:	L65    系统设备接口
行业分类:	GB    国家标准
ICS分类:	35.200 35.200    接口和互连设备 35.200
发布机构:	国家市场监督管理总局 国家标准化管理委员会
发布日期:	2019-05-10
实施日期:	2019-12-1
标准状态:	现行
替代旧标准:	GB/T 20851.4-2007 电子收费 专用短程通信 第4部分：设备应用 GB/T 20851.4-2007/XG1-2012 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
翻译语言:	英文
文件格式:	PDF
中文字符数:	46000 字
翻译价格(元):	1500.00 元
交付时间:	付款后 1 个工作日

GB/T 20851 consists of the following five parts under the general title Electronic toll collection - Dedicated short range communication:



——Part 1: Physical layer;



——Part 2: Data link layer;



——Part 3: Application layer;



——Part 4: Equipment application;



——Part 5: Test methods of the main parameters in physical layer.



This is part 4 of GB/T 20851.



This part is developed in accordance with the rules given in GB/T 1.1-2009.



This part replaces GB/T 20851.4-2007 Electronic toll collection - Dedicated short range communication - Part 4: Equipment application. In addition to editorial changes, the following main technical changes have been made with respect to GB/T 20851.4-2007:



——some normative references are modified (see Clause 2; Clause 2 of Edition 2007);



——normative references for battery requirements and transportation safety are added (see Clause 2);



——some abbreviations are modified (see 3.2; 3.2 of Edition 2007);



——the requirement that ETC application is only limited to bi-chip type is modified (see 4.1; 4.1 of Edition 2007);



——the file types of OBE data structure are deleted (see Table 1 of Edition 2007);



——the codes of OBE keys are deleted (see Table 2 of Edition 2007);



——the codes of file attributes are deleted (see Table 3 of Edition 2007);



——the "unauthorized" in the file attribute is changed to "forbidden" (see Table 3; Table 3 of Edition 2007);



——the TDES security calculation algorithm is modified to SM4 algorithm (see 5.1.2; 5.1.2 of Edition 2007);



——the size of information storage space to be supported by OBE is modified (see 5.1.3; 5.1.3 of Edition 2007);



——the requirements for standard configuration components and optional configuration components to be supported by OBE are modified (see 5.1.4; 5.1.4 of Edition 2007);



——the security requirements for battery are added (see 5.1.8);



——the requirements for OBE environment conditions are modified (see 5.1.11; 5.1.10 of Edition 2007);



——the requirements for OBE electromagnetic compatibility are added (see 5.1.12);



——the suggestions on the installation position of OBE in the vehicle are added (see 5.1.13);



——the requirements for OBE wakeup sensitivity and adjustable function of equivalent isotropically radiated power are added (see 5.1.14);



——the requirement that RSE shall be equipped with built-in PSAM security authentication module as security access module or chip, board card or auxiliary equipment reaching the same security level is modified (see 5.2.3; 5.2.3 of Edition 2007);



——the requirements for RSE upper computer communication interface are modified (see 5.2.4; 5.2.4 of Edition 2007);



——the requirement that RSE shall be provided with network monitoring interface is added (see 5.2.4);



——the requirements for RSE power supply are modified (see 5.2.8; 5.2.8 of Edition 2007);



——the requirements for RSE environment conditions are modified (see 5.2.10; 5.2.10 of Edition 2007);



——the requirements for RSE electromagnetic compatibility are added (see 5.2.12);



——the requirements for adjustable function of equivalent isotropically radiated power of RSE are added (see 5.2.13);



——the OBE data structure and the type, reading attribute and writing attribute in attributes are deleted (see 6.1 of Edition 2007);



——the key codes of system key files are deleted (see Table 6 of Edition 2007);



——the tampered status in system information file is added (see 6.2.2);



——the key codes of ETC application key files are deleted (see Table 8 of Edition 2007);



——the requirements for ETC application reserved file are modified (see 6.3.4; 6.3.4 of Edition 2007);



——the identification station application file and urban road toll collection application file are deleted (see 6.3.5 and 6.3.6 of Edition 2007);



——the value range of the starting position of operating data in the request parameter requirements of the GetSecure service primitive and SetSecure service primitive are modified (see 7.2.2.1 and 7.3.2.1; 7.2.2.1 and 7.3.2.1 of Edition 2007);



——the functional requirements for SetSecure service primitive are modified (see 7.3.1; 7.3.1 of Edition 2007);



——the man-machine interaction indication identification in SetMMI is added (see 7.6.1);



——the key algorithm in ETC application security is modified, and TDES algorithm is changed to SM4 algorithm (see Clause 8; Clause 8 of Edition 2007);



——the requirements for ETC transaction process are added (see Clause 9);



——the expression of EtcVehicleFile vehicle license plate color in ASN.1 data structure by binary code, SetMMIRq data structure and SysInfoFile data of OBE are modified (see Annex A; Annex A of Edition 2007);



——the annex “Examples for transaction process of ETC application” is deleted (Annex B of Edition 2007);



——the definition of DSRC data frame for composite payment transaction application in ETC transaction process is added (see Annex B);



——the requirements for the data frame splicing multiple T-APDUs in the same LSDU are added (see Annex C).



This part was proposed by and is under the jurisdiction of the National Technical Committee on Intelligent Transportation Systems of Standardization Administration of China (SAC/TC 268).



The previous edition replaced by this part is as follows:



——GB/T 20851.4-2007.





Electronic toll collection - Dedicated short range communication - Part 4: Equipment application



1 Scope



This part of GB/T 20851 specifies the general principle of application, overall technical requirements of key equipment, OBE data structure, application interface, application security and transaction process of the dedicated short range communication equipment for electronic toll collection.



This part is applicable to electronic toll collection system for highways and urban roads, and may be used as a reference for fields of automated vehicle identification, vehicle access control system, etc.



2 Normative references



The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.



GB/T 2312 Code of Chinese graphic character set for information interchange - Primary set

GB/T 2423.5-1995 Environmental testing for electric and electronic products - Part 2: Test methods - Test Ea and guidance: Shock

GB/T 2423.10-2008 Environmental testing for electric and electronic products - Part 2: Tests methods - Test Fc: Vibration (sinusoidal)

GB/T 2423.18-2012 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)

GB/T 3482-2008 Lightning test method for electronic equipments

GB/T 4208-2017 Degrees of protection provided by enclosure (IP code)

GB/T 9254 Information technology equipment - Radio disturbance characteristics - Limits and methods of measurement

GB/T 17618 Information technology equipment - Immunity characteristics - Limits and methods of measurement

GB/T 17626.2 Electromagnetic compatibility - Testing and measurement techniques - Electrostatic discharge immunity test

GB/T 18655 Vehicles boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers

GB/T 20135-2006 Intelligent transport systems - Electronic toll collection - System architecture

GB/T 20839-2007 Intelligent transport systems - General terminology

GB/T 20851.1-2019 Electronic toll collection - Dedicated short range communication - Part 1: Physical layer

GB/T 20851.2-2019 Electronic toll collection - Dedicated short range communication - Part 2: Data link layer

GB/T 20851.3-2019 Electronic toll collection - Dedicated short range communication - Part 3: Application layer

JR/T 0025.9-2010 China financial integrated circuit card specifications - Part 9: Electronic purse extended application guide

ISO/IEC 7816-1 Identification cards - Integrated circuit cards - Part 1: Cards with contacts - Physical characteristics

ISO/IEC 7816-2 Identification cards - Integrated circuit cards - Part 2: Cards with contacts - Dimensions and location of the contacts

ISO/IEC 7816-3 Identification cards - Integrated circuit cards - Part 3: Cards with contacts - Electrical interface and transmission protocols

ISO/IEC 7816-4 Identification cards - Integrated circuit cards - Part 4: Organization, security and commands for interchange

ISO/IEC 14443

(All parts) Identification cards - Contactless integrated circuit cards - Proximity cards

UL1642 Standard for safety lithium batteries

UN38.3 Recommendations on the transport of dangerous goods: Manual of tests and criteria



3 Terms, definitions and abbreviations



3.1 Terms and definitions



For the purposes of this document, the terms and definitions given in GB/T 20135-2006 and GB/T 20839-2007 apply.



3.2 Abbreviations



For the purposes of this document, the following abbreviations apply.



AVI: Automatic Vehicle Identification



DID: Directory Identifier



DSRC: Dedicated Short Range Communication



ETC: Electronic Toll Collection



FID: File Identifier



ICC: Integrate Circuit Card



MAC: Message Authentication Code



OBE: On Board Equipment



RSE: Roadside Equipment



UI: Unnumbered Information



4 General principle of application



4.1 Constitution of ETC system



A ETC system is composed of front end system, which contains lane control system, RSE, OBE and ICC, and backend database system.



OBE should be bi-chip type, supporting ICC reading/writing. For ETC application, ICC allows the functions involving electronic payment of bi-chip OBE while OBE provides a function of information transmission from ICC to RSE. See Figure 1 for the constitution of ETC system; wherein, the contents in the dotted box are those involved in this part.







Figure 1 Constitution of ETC system



See Figure 2 for the example of typical ETC transaction for bi-chip OBE.







Figure 2 Example of typical ETC transaction for bi-chip OBE



4.2 General provisions for OBE data



4.2.1 The data in OBE are organized into directories and files.



4.2.2 The directories in OBE are classified into system directory and application directory. The system directory is the root directory of OBE and is sole, while the application directory is a subdirectory under the root directory and may have multiple ones with one application corresponding to one directory. There are multiple files under each directory but there shall be no subdirectories under a subdirectory.



4.2.3 Files are classified into key file and application file: the key file stores the secret keys for controlling the security access of application data; the application file stores the application data.



4.2.4 The directories and files are identified respectively by DID and FID. The directory number DID ranges from 0x00 to 0x0F and that with DID of 0x00 is the root directory. The file number FID ranges from 0x00 to 0x7F and that with FID of 0x00 is the key file. The files under the root directory are system files and application files are stored in application directories. For ETC application, the directory number shall be 0x01.



4.2.5 See Table 1 for the structure of OBE data.



 

Table 1 Structure of OBE data

Directory/file ASN.1 data structure a

0x00

Root directory 0x00 system key file SysKeyFile

0x01 system information file SysInfoFile

... …

0x01 ETC application directory 0x00 ETC application key file EtcAppKeyFile

0x01 ETC application vehicle information file EtcAppVehicleFile

... …

... other application directories ... …

a See Annex A for ASN.1 data structure.



4.3 OBE key



Keys are classified into major governing key, maintenance key, authentication key and encryption key. The major governing keys are classified into system major governing key and application major governing key. The former is in the system key file and the latter is in the corresponding application key file. See Table 2 for the functions of keys.



Table 2 Functions of keys

Key type Key function Application process

Major governing key File creation enabled after passing authentication;

Security write-in by itself;

Security write-in of the other keys under the same directory;

The major governing key under the root directory is used for the write-in of the major governing key of subdirectory Release

Maintenance key Security-mode write-in of the files in the directory concerned Release

Authentication key Control of the authority to access, read and write the files in the directory concerned Transaction

Encryption key Encryption and decryption processing of data during transmission Transaction



4.4 File attribute



File access is key-controlled.



The deletion and creation of directories and files are carried out under the control of major governing keys.



Common files (non-key files) have four attributes, see Table 3.



 

Table 3 Attributes of files

Attribute Description

Free Free to read or write, no authentication or encryption processing required; transmission in plaintext data

Authentication Reading or writing enabled after passing authentication; transmission in plaintext data

Encryption The data contents under reading or writing are encrypted; transmission in ciphertext data

Forbidden Forbid the authority to read or write



4.5 Extended application interfaces



ETC equipment shall provide application interfaces that are extended on the basis of service primitive ACTION.



The service primitive shall meet the requirements of GB/T 20851.3-2019.



See Table 4 for the extended ETC application interfaces.



Table 4 Extended ETC application interfaces

Action type a Action name Description

0 GetSecure Read security files, and provide MAC and security encryption interfaces

1 SetSecure Write-in security files, and provide MAC and security encryption interfaces

2 GetRand Take random numbers for security purpose

3 TransferChannel Transfer channel to transfer APDU to OBE components

4 SetMMI Set man-machine interface, and specify the uniform instructions required for OBE

a The corresponding parameter of service primitive ACTION is ActionType.



5 General technical requirements of key equipment



5.1 General technical requirements of OBE



5.1.1 Wireless link communication



The DSRC between OBE and RSE shall comply with the relevant requirements of GB/T 20851.1-2019~GB/T 20851.3-2019.



5.1.2 Security



The OBE shall meet the following security requirements:



a) OBE shall provide a security access module to store access control keys and ETC application information, etc.



b) OBE shall support the data access and access control based on SM4 algorithm;



c) The write-in of all initialized data shall be transmitted by means of SM4 algorithm encryption.



d) OBE shall have an ICC read/write interface which shall comply with the relevant requirements of ISO/IEC 7816-1~ISO/IEC 7816-4 or ISO/IEC 14443 TYPE-A.



e) The ICC transaction process supported shall comply with 7.3 and 7.4, JR/T 0025.9-2010.



5.1.3 Information storage



Block data should be adopted for the storage of user information in OBE, and directory and files shall be adopted for its addressing.



The security access module in OBE shall be provided with at least 16k bytes of storage space.



5.1.4 Components



5.1.4.1 Standard configuration components



Bi-chip OBE shall be configured with ICC read/write module.



5.1.4.2 Optional configuration components



The optional configuration components for OBE include speaker, character display, red and green indicator lights, USB interface, RS232 serial port and Bluetooth module.



5.1.5 Tampering prevention and recovery



OBE shall be provided with a function against tampering. Once it is tampered, a flag byte/flag bit shall be accordingly set up in appropriate information storage area of OBE.



The ETC application, in case of failure due to tampering, shall be able to be recovered by software setting.

Foreword i
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 General principle of application
5 General technical requirements of key equipment
6 OBE data structure
7 Interfaces of ETC application
8 Security of ETC application
9 ETC transaction process
Annex A (Normative) ASN.1 data structure of OBE
Annex B (Informative) DSRC data frame definition between RSE and OBE in composite payment transaction applications
Annex C (Informative) Example of multiple T-APDUs spliced in the same LSDU

电子收费 专用短程通信
第4部分：设备应用
1 范围
GB/T 20851的本部分规定了用于电子收费专用短程通信设备的应用总则、关键设备总体技术要求、OBE数据结构、应用接口和应用安全、交易流程。
本部分适用于公路和城市道路电子收费系统，自动车辆识别、车辆出入管理等领域可参照使用。
2规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件，仅注日期的版本适用于本文件。凡是不注日期的引用文件，其最新版本(包括所有的修改单)适用于本文件。
GB/T 2312信息交换用汉字编码字符集 基本集
GB/T 2423.5—1995 电工电子产品环境 试验第二部分：试验方法 试验Ea和导则：冲击
GB/T 2423.10—2008 电工电子产品环境试验 第2部分：试验方法 试验Fc：振动(正弦)
GB/T 2423.18—2012环境试验 第2部分：试验方法 试验Kb：盐雾，交变(氯化钠溶液)
GB/T 3482—2008 电子设备雷击试验方法
GB/T 4208—2017外壳防护等级(IP代码)
GB/T 9254 信息技术设备的无线电骚扰限值和测量方法
GB/T 17618信息技术设备 抗扰度 限值和测量方法
GB/T 17626.2 电磁兼容 试验和测量技术 静电放电抗扰度试验
GB/T 18655 车辆、船和内燃机 无线电骚扰特性 用于保护车载接收机的限值和测量方法
GB/T 20135—2006 智能运输系统 电子收费 系统框架模型
GB/T 20839—2007智能运输系统 通用术语
GB/T 20851.1—2019 电子收费 专用短程通信 第1部分：物理层
GB/T 20851.2—2019 电子收费 专用短程通信 第2部分：数据链路层
GB/T 20851.3—2019 电子收费 专用短程通信 第3部分：应用层
JR/T 0025.9—2010 中国金融集成电路(IC)卡规范 第9部分：电子钱包扩展应用指南
ISO/IEC 7816-1 识别卡 集成电路卡 第1部分：带触电的卡 物理特性(Identification cards—Integrated circuit cards—Part 1：Cards with contacts—Physical characteristics)
ISO/IEC 7816-2 识别卡 集成电路卡 第2部分：带触电的卡 触点的尺寸和位置(Identification cards—Integrated circuit cards—Part 2：Cards with contacts—Dimensions and location of the contacts)
ISO/IEC 7816-3 识别卡 集成电路卡 第3部分：带触电的卡 电信号和传输协议(Identification cards—Integrated circuit cards—Part 3：Cards with contacts—Electrical interface and transmission protocols)
ISO/IEC 7816-4识别卡 集成电路卡 第4部分：用于交换的结构、安全和命令(Identification cards—Integrated circuit cards—Part 4：Organization，security and commands for interchange)
ISO/IEC 14443(所有部分)识别卡 非接触卡规范 临近卡(Identification cards—Contactless integrated circuit cards—Proximity cards)
UL1642 美国锂电池安全标准(STANDARD FOR SAFETY Lithium Batteries)
UN38.3 联合国危险物品运输试验和标准手册38.3款(Recommendations on the TRANSPORT OF DANGEROUS GOODS：Manual of Tests and Criteria)
3术语和定义、缩略语
3.1术语和定义
GB/T 20135—2006和GB/T 20839--2007界定的术语和定义适用于本文件。
3.2 缩略语
下列缩略语适用于本文件。
AVI：自动车辆识别(Automatic Vehicle Identification)
DID：目录标识(Directory Identifier)
DSRC：专用短程通信(Dedicated Short Range Communication)
ETC：电子收费(Electronic Toll Collection)
FID：文件标识(File Identifier)
ICC：集成电路卡(Integrate Circuit Card)
MAC：信息鉴别码(Message Authentication Code)
OBE：车载设备(On Board Equipment)
RSE：路侧设备(Roadside Equipment)
UI：无编号信息(Unnumbered Information)
4 应用总则
4.1 ETC系统构成
ETC系统由前端系统和后台数据库系统组成，前端系统包括车道控制系统、RSE、OBE以及ICC。
OBE宜为双片式类型，支持ICC的读写。在ETC应用中，双片式类型OBE涉及电子支付的功能由ICC实现，OBE提供ICC至RSE信息转发功能。ETC系统构成见图1，虚线方框内为本部分所涉及的内容。

存储支付信息
存储AVI信息
DSRC通信
ICC访问接口
AVI信息交互
(用户、车辆信息、道路信息或交易信息等)
计算机通信接口
后台数据库系统
车道控制系统
图1 ETC系统构成
双片式类型OBE典型ETC交易示例见图2。

获取AVI信息
获取支付辅助信息
支付过程
车道控制系统
验证AVI信息
AVI验证通过
验证支付辅助信息
计算支付额并传输
传输支付记录
图2双片式类型OBE典型ETC交易示例
4.2 OBE数据一般规定
4.2.1 OBE内的数据采用目录与文件进行组织。
4.2.2 OBE内目录分为系统目录及应用目录，系统目录为OBE的根目录，只有一个；应用目录是根目录下的子目录，可有多个，一个应用对应一个目录。每个目录下有多个文件，子目录下不应有其他子目录。
4.2.3文件分为密钥文件和应用文件两类：密钥文件存储用以控制应用数据的安全访问的密钥；应用文件用于存储应用数据。
4.2.4 目录和文件分别以DID和FID来标识。目录编号DID范围为0x00～0x0F，其中DID为0x00者为根目录。文件编号FID范围为0x00～0x7F，其中FID为0x00者为密钥文件。根目录下的文件为系统文件，应用文件存储于应用目录中。对于ETC应用，目录号应为0x01。
4.2.5 OBE数据组织结构见表1。
表1 OBE数据组织结构
目录/文件 ASN.1数据结构a
0x00
根目录 0x00系统密钥文件 SysKeyFile
0x01系统信息文件 SysInfoFile
… …
0x01 ETC应用目录 0x00 ETC应用密钥文件 EtcAppKeyFile
0x01 ETC应用车辆信息文件 EtcAppVehicleFile
… …
…其他应用目录 … …
a ASN.1数据结构按附录A规定。

4.3 OBE密钥
密钥分为四类：主控密钥、维护密钥、认证密钥和加密密钥。主控密钥分系统主控密钥和应用主控密钥，系统主控密钥在系统密钥文件中，应用主控密钥在对应的应用密钥文件中。密钥功能见表2。
表2密钥功能
密钥类型 密钥功能 应用过程
主控密钥 认证通过后可创建文件；
对自身进行安全写入；
对同目录下其他密钥的安全写入；
根目录下的主控密钥用于子目录主控密钥的写入 发行
维护密钥 本目录文件的安全方式写入 发行
认证密钥 本目录文件访问读写权限控制 交易
加密密钥 传输过程中数据的加密与解密处理 交易

4.4文件属性
文件访问由密钥控制。
目录和文件的删除与创建在主控密钥的控制下进行。
普通文件(非密钥文件)有四种属性，文件属性见表3。
表3文件属性
属性 描述
自由 自由读或写，不需要任何认证或加密处理，传输为明文数据
认证 认证后可以读或写，传输为明文数据
加密 读或写的数据内容进行加密处理，传输为密文数据
禁止 禁止读或者禁止写的权限

4.5扩展应用接口
ETC设备应提供基于ACTION服务原语所扩展的应用接口。
ACTION服务原语应符合GB/T 20851.3—2019的要求。
扩展ETC应用接口见表4。
表4扩展ETC应用接口
操作类型a 操作名称 描述
0 GetSecure 安全文件读取，提供MAC和安全加密接口
1 SetSecure 安全文件写入，提供MAC和安全加密接口
2 GetRand 取随机数，用于安全用途
3 TransferChannel 通道传输，用于向OBE部件传输APDU
4 SetMMI 设置人机界面，规范OBE需统一指示的内容
a对应的ACTION服务原语的参数为ActionType。

5关键设备总体技术要求
5.1 OBE总体技术要求
5.1.1 无线链路通信
OBE和RSE之间的DSRC应符合GB/T 20851.1—2019～GB/T 20851.3—2019的相关规定。
5.1.2 安全
OBE的安全要求应符合以下要求：
a)应提供安全访问模块，以存放访问控制密钥和ETC应用信息等；
b)应支持SM4算法的数据存取和访问控制；
c)所有初始化数据的写入应采用SM4算法的加密方式传输；
d)应具备ICC读写接口，该接口应符合ISO/IEC 7816-1～ISO/IEC 7816-4或ISO/IEC 14443 TYPE-A标准的相关规定；
e)支持的ICC交易流程应符合JR/T 0025.9—2010中7.3和7.4的规定。
5.1.3信息存储
OBE内的用户信息存储宜采用数据块的方式，寻址应采用目录和文件的方式。
OBE内的安全访问模块应具有部小程16 k发节存储空间。
5.1.4 部件
5.1.4.1标准配置部件
双片式类型OBE应配置的部件为ICC读写模块。
5.1.4.2可选配置部件
OBE可选的配置部件：扬声器、发布显示器、红绿子示灯、USB接口、RS232串口、蓝牙模块等。
5.1.5防拆卸与恢复
OBE应具备防止用户拆卸功能，一旦被拆卸，应当立即在OBE内的相应信息存储区中设置相应标志发节/标志位。
因拆卸而引起的ETC应用失效应能够通过软件设置的方式得到恢复。
5.1.6应用的更新
OBE应支持应用更新，更应可采用DSRC方式或其他方式。
5.1.7 交易记录
OBE应支持不少于50条最新交易记录的存储，交易记录可采用DSRC方式或其他方式读出。
5.1.8 电池
OBE电池应具备相应的安全性，并符合UL 1642和UN 38.3的要求。
5.1.9可靠性
OBE平均无故障时间应大于50 000 h。
5.1.10平均免维护时间
OBE平均免维护时间应不小于2年(按每天10次交易计算)。
5.1.11 环境条件
环境条件应符合以下要求：
a)工作温度：-25℃～+70℃，寒区-40℃～+70℃；
b)存储温度：-20℃～+55℃；
c)相对工作湿度：5％～100％；
d)振动：应符合GB/T 2423.10—2008附录C中表C.1第三行给出的设备应用严酷等级要求，频率范围10 Hz～150 Hz，加速度10 m/s2，在每一轴线方向上的扫频循环次数为20；
e)冲击：应符合GB/T 2423.5—1995第5章中表1第三行给出的严酷等级要求，峰值加速度300 m/s2，相应的标称脉冲持续时间18 ms，相应的速度变化量半正弦为3.4 m/s。
5.1.12电磁兼容性能
对于连接在车辆线束上或车载电源上的OBE设备，其无线电骚扰特性应符合GB/T 18655的规定，限值要求应经整车生产商和设备生产商协商一致确定。
OBE对于静电放电抗扰度应按GB/T 17618规定的性能判据B的要求，试验方法按照GB/T 17626.2的规定，接触放电电压6 kV，空气放电电压8 kV。
5.1.13安装位置
对于整体安装在车辆前挡风玻璃上的OBE，小型客车宜安装在车辆的前挡风玻璃上方居中(后视镜位置附近)位置，大型客车宜安装在前风挡玻璃下方且方便司机插拔ICC的位置；对于预先在前挡风玻璃留有微波窗口的车辆，OBE宜安装在微波窗口位置。
5.1.14其他建议
OBE唤醒灵敏度在符合GB/T 20851.1—2019规定的前提下，可分为以下几挡：
a)-43 dBm～-47 dBm；
b)-48 dBm～-52 dBm；
c)小于或等于-53 dBm；
d)也可设置其他范围。
OBE的等效全向辐射功率在符合GB/T 20851.1—2019规定的前提下，可分为以下几挡：
a)-3 dBm～+3 dBm；
b)+3 dBm～+10 dBm；
c)也可设置其他范围。
5.2 RSE总体技术要求
5.2.1 工作方式
RSE采用联机工作方式。
RSE应提供应用层服务原语接口。
5.2.2无线链路通信
RSE和OBE之间的DSRC应符合GB/T 20851.1—2019～GB/T 20851.3—2019的相关规定。
5.2.3 安全
RSE应设置安全访问模块或者达到同样安全等级的芯片、板卡或辅助设备等，以存放访问控制密钥，所有的加密和认证过程均通过安全硬件产品进行。
5.2.4接口
RSE支持的接口要求如下：
a)应支持以太网方式的上位机通信接口，其他RS232、RS485或USB等接口形式可选；
b)应具有网络监测接口，支持RSE关键参数、配置管理、版本管理、诊断测试、日志管理、告警等信息的监测功能；
c)宜具有TTL电平的隔离接口。
5.2.5程序和应用的更新
RSE应具有通过上位机接口进行在线程序和应用更新的能力。
5.2.6 安装
固定安装方式的RSE设备应支持户外安装，防护等级应满足GB/T 4208--B017的要求，并可采用路侧或者顶挂方式；宜采用顶挂安装方式，且吊装在车道正中，挂装高度不低于5.5 m。
5.2.7通信区域
RSE设备通信区域宽度应可调整在3.3 m范围内，通信区域宽度示意见图3。

最大3.3 m
图3通信区域宽度示意
5.2.8 供电
RSE设备应在交流电压220×(1±15％)V，频率50×(1±4％)Hz的电源条件下正常工作。
5.2.9 可靠性
RSE平均无故障时间应大于70 000 h。
5.2.10环境条件
环境条件应符合以下要求：
a)工作温度：-20℃～+55℃，寒区-35℃～+40℃；
b)存储温度：-20℃～+55℃；
c)相对工作湿度：4％～100％；
d)振动：应符合GB/T 2423.10—2008附录C中表C.1第一行给出的设备应用严酷等级要求，频率范围10 Hz～150 Hz，加速度5 m/s2，在每一轴线方向上的扫频循环次数为50；
e)冲击：应符合GB/T 2423.5—1995第5章中表1第三行给出的严酷等级要求，峰值加速度300 m/s2，相应的标称脉冲持续时间18 ms，相应的速度变化量半正弦为3.4 m/s；
f)盐雾：应符合GB/T 2423.18—2012的严酷等级1；
g)雷击：应符合GB/T 3482--2008，电源线雷击严酷等级4，信号线雷击严酷等级2，电源线与信号线间雷击严酷等级4。
5.2.11 防护等级
RSE(室外部分)外壳防护等级应符合GB/T 4208—2017中IP65等级要求。
5.2.12 电磁兼容性能
RSE的无线电骚扰性能指标应符合GB/T 9254中B级的相应规定。
RSE的抗扰度性能应符合GB/T 17618中规定的相应性能判据。
5.2.13 其他要求
RSE等效全向辐射功率应在GB/T 20851.1—2019表1规定的指标范围内并可调节。