GB/T 20851.1-2019 (GB/T20851.1-2019, GBT 20851.1-2019, GBT20851.1-2019) & related versions
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Electronic toll collection -- Dedicated short range communication -- Part 1: Physical layer
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GB/T 20851.1-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 35.100.10
L 79
Replacing GB/T 20851.1-2007
Electronic Toll Collection – Dedicated Short Range
Communication – Part 1: Physical Layer
ISSUED ON: MAY 10, 2019
IMPLEMENTED ON: DECEMBER 01, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Signs and Abbreviations ... 6
5 Basic Requirements ... 7
6 Downlink Technical Requirements ... 7
7 Uplink Technical Requirements ... 8
Bibliography ... 10
Foreword
GB/T 20851 Electronic Toll Collection – Dedicated Short Range Communication can
be divided into the following 5 parts:
--- 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 Part belongs to Part 1 of GB/T 20851.
This Part was drafted as per the rules specified in GB/T 1.1-2009.
This Part replaced GB/T 20851.1-2007 Electronic Toll Collection – Dedicated Short
Range Communication – Part 1: Physical Layer. Compared with GB/T 20851.1-2007,
this Part has the major technical changes as follows besides the editorial modification:
--- Modify the downlink technical requirements; transfer the contents of “downlink”
into “downlink technical requirements” (see Clause 6 of this Edition; 5.2 of 2007
Edition);
--- Add the provisions on the indicators such as downlink antenna sidelobe level,
antenna front-to-rear ratio, 14kHz square wave wake-up signal accuracy, OBU
maximum input signal power, OBU co-channel interference rejection ratio, OBU
adjacent channel interference rejection ratio, OBU blocking interference rejection
ratio, etc. (see Clause 6 of this Edition);
--- Modify the provisions of the indicators such as downlink modulation factor, OBU
receiving bandwidth, preamble, etc. (see Clause 6 of this Edition; 5.2 of 2007
Edition);
--- Modify the uplink technical requirements; transfer the contents of “uplink” into
“uplink technical requirements” (see Clause 7 of this Edition; 5.3 of 2007 Edition);
--- Add the provisions of indicators such as uplink RSU maximum input signal power,
RSU co-channel interference rejection ratio, RSU adjacent channel interference
rejection ratio, RSU blocking interference rejection ratio, RSU receiving
bandwidth, etc. (see Clause 7 of this Edition);
--- Modify the provisions of indicators such as uplink adjacent channel leakage
Electronic Toll Collection – Dedicated Short
Range Communication – Part 1: Physical Layer
1 Scope
This Part of GB/T 20851 specifies the basic requirements for the physical layer of
dedicated short-range communication of electronic toll collection, as well as the
downlink and uplink technical requirements.
This Part is applicable to the electronic toll collection system on the highway and city
road; while the automatic vehicle identification, vehicle access management, and the
like fields can use for reference.
2 Normative References
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 9410-2008 General Specification for Antennas Used in the Mobile
Communications
GB/T 13622-2012 Terminology for Radio Regulation
GB/T 14733.7-2008 Terminology for Telecommunication – Oscillations, Signals
and Related Devices
GB/T 14733.9-2008 Terminology for Telecommunication - Radio Wave
Propagation
GB/T 20839-2007 Intelligent Transport Systems - General Terminology
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 9410-2008,
GB/T 13622-2012, GB/T 14733.7-2008, GB/T 14733.9-2008 and GB/T 20839-2007
and the following apply.
3.1 Wakeup
The process in which the on-board unit (OBU) transmitting from a sleep state to an
active state.
3.2 Preamble
The advance signal of the physical layer frame information, irrelevant to the link layer,
may be a modulated or unmodulated carrier wave.
3.3 Post-amble
The post signal of the physical layer frame information, irrelevant to the link layer, may
be a modulated or unmodulated carrier wave.
4 Signs and Abbreviations
4.1 Signs
The following signs are applicable to this document.
dBm: characterize the ratio of power and 1mW.
RSUt: Roadside Unit Transmitting Antenna.
RSUr: Roadside Unit Receiving Antenna.
4.2 Abbreviations
The following abbreviations are applicable to this document.
ASK: Amplitude Shift Keying
BER: Bit Error Rate
e.i.r.p: equivalent isotropically radiated power
ETC: Electronic Toll Collection
FSK: Frequency Shift Keying
OBU: On Board Unit
RSU: Roadside Unit
XPD: Cross Polarization Discrimination
......
GB/T 20851.1-2007
Electronic toll collection.Dedicated short range communication.Part 1. Physical payer
ICS 35.100.10
L79
National Standards of People's Republic of China
Electronic toll-specific short-range communication
Part 1. Physical layer
Part 1. Physicallayer
Released on.2007-03-19
2007-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword I
1 range 1
2 Normative references 1
3 Terms and Definitions 1
4 symbols and abbreviations 1
5 Technical requirements 2
Reference 5
Foreword
GB/T 20851-2007 "Electronic toll-specific short-range communication" is divided into.
--- Part 1. Physical layer;
--- Part 2. Data link layer;
--- Part 3. Application layer;
--- Part 4. Equipment application;
--- Part 5. Test methods for the main parameters of the physical layer.
This part is the first part of GB/T 20851-2007.
This part is proposed and managed by the National Intelligent Transportation System Standardization Technical Committee (SAC/TC268).
This section drafted by. Highway Science Research Institute of the Ministry of Communications, Shenzhen Jinyi Technology Co., Ltd.
The main drafters of this section. Xiao Di, Li Xingrui, Yang Yun, Song Xianghui, Lai Zhanjun.
Electronic toll-specific short-range communication
Part 1. Physical layer
1 Scope
This section specifies the technical requirements for the dedicated short-range communication (DSRC) physical layer for electronic toll collection (ETC).
This section applies to road electronic toll collection systems, automatic vehicle identification, vehicle access management, urban road tolls and other fields can be used.
2 Normative references
The terms in the following documents become the provisions of this part by reference to this part of GB/T 20851. Quotations with dated
And all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouragement is achieved in accordance with this section.
The parties to the agreement study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this
section.
GB/T 9410-1988 General specification for mobile communication antennas
GB/T 13622-1992 Radio Management Terminology
GB/T 14733.7-1993 Telecommunications terminology oscillation, signal and related devices
GB/T 14733.9-1993 Telecommunications terminology radio wave propagation
GB/T 20839-2007 General terminology for intelligent transportation systems
3 Terms and definitions
GB/T 9410-1988, GB/T 13622-1992, GB/T 14733.7-1993, GB/T 14733.9-1993 and
The terms and definitions established in GB/T 20839-2007 and the following terms apply to this section.
3.1
Wake up wakeup
The process in which the onboard unit (OBU) transitions from a sleep state to an active state.
3.2
Preamble preamble
The preamble of the physical layer frame information, regardless of the link layer, may be a modulated or unmodulated carrier.
3.3
Postcode post-amble
The post signal of the physical layer frame information, irrespective of the link layer, may be a modulated or unmodulated carrier.
4 symbols and abbreviations
4.1 symbol
The following symbols apply to this section.
dBm characterizes the ratio of power to 1mW, 0dBm=1mW
RSUt roadside unit transmitting antenna
RSUr roadside unit receiving antenna
4.2 Abbreviations
The following abbreviations apply to this section.
......
| Standard ID | GB/T 20851.1-2019 (GB/T20851.1-2019) | | Description (Translated English) | Electronic toll collection -- Dedicated short range communication -- Part 1: Physical layer | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L79 | | Classification of International Standard | 35.100.10 | | Word Count Estimation | 10,124 | | Date of Issue | 2019-05-10 | | Date of Implementation | 2019-12-01 | | Older Standard (superseded by this standard) | GB/T 20851.1-2007 | | Quoted Standard | GB/T 9410-2008; GB/T 13622-2012; GB/T 14733.7-2008; GB/T 14733.9-2008; GB/T 20839-2007 | | Drafting Organization | Highway Research Institute of the Ministry of Transport, Zhongguancun China Communications Guotong Intelligent Transportation Industry Alliance, Beijing China Communications Guotong Intelligent Transportation System Technology Co., Ltd., Shenzhen Jinyi Technology Co., Ltd., Beijing Wanji Technology Co., Ltd., Beijing Juli Technology Co., Ltd., Shenzhen Chenggu Technology Co., Ltd., Beijing Sutong Technology Co., Ltd., Guangzhou Aites Communication Equipment Co., Ltd. | | Administrative Organization | National Intelligent Transportation System Standardization Technical Committee (SAC/TC 268) | | Proposing organization | National Intelligent Transportation System Standardization Technical Committee (SAC/TC 268) | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the basic requirements for a dedicated short-range communication physical layer for electronic charging, as well as downlink and uplink technical requirements. This standard is applicable to electronic toll collection systems for highways and urban roads, and can be used for reference in the fields of automatic vehicle identification and vehicle exit management. | | Standard ID | GB/T 20851.1-2007 (GB/T20851.1-2007) | | Description (Translated English) | Electronic toll collection. Dedicated short range communication. Part 1: Physical payer | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L79 | | Classification of International Standard | 35.100.10 | | Word Count Estimation | 10,125 | | Date of Issue | 2007-03-19 | | Date of Implementation | 2007-05-01 | | Quoted Standard | GB/T 9410-1988; GB/T 13622-1992; GB/T 14733.7-1993; GB/T 14733.9-1993; GB/T 20839-2007 | | Drafting Organization | Research Institute of Highway Ministry | | Administrative Organization | National Standardization Technical Committee Intelligent Transport Systems | | Regulation (derived from) | China Announcement of Newly Approved National Standards No. 3 of 2007 (No. 103 overall) | | Proposing organization | National Intelligent Transportation System Standardization Technical Committee (SAC/TC 268) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of PRC, China National Standardization Administration Committee | | Summary | This standard provides for the electronic toll collection (ETC) of the Dedicated Short Range Communication (DSRC) Physical Layer technical requirements. For highway electronic toll collection system, automatic vehicle identification, vehicle access control, urban areas such as road pricing can refer to use. |
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