GB/T 20851.1-2019 PDF EnglishUS$135.00 · In stock · Download in 9 seconds
GB/T 20851.1-2019: Electronic Toll Collection - Dedicated Short Range Communication - Part 1: Physical Layer Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 20851.1: Historical versions
Similar standardsGB/T 20851.1-2019: Electronic Toll Collection - Dedicated Short Range Communication - Part 1: Physical Layer---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20851.1-2019 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 ContentsForeword ... 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 ... 10ForewordGB/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 Layer1 ScopeThis 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 ReferencesThe 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 Terminology3 Terms and DefinitionsFor 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 Abbreviations4.1 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 ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 20851.1-2019 be delivered?Answer: The full copy PDF of English version of GB/T 20851.1-2019 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 20851.1-2019_English with my colleagues?Answer: Yes. 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