1、 ETSI TR 103 403 V1.1.1 (2017-06) Intelligent Transport Systems (ITS); Mitigation techniques to avoid harmful interference between equipment compliant with ES 200 674-1 and ITS operating in the 5 GHz frequency range; Evaluation of mitigation methods and techniques TECHNICAL REPORT ETSI ETSI TR 103 4
2、03 V1.1.1 (2017-06) 2Reference DTR/ITS-00434 Keywords ITS, regulation ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 78
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9、(2017-06) 3Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g3Executive summary 4g3Introduction 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 6g33 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Symbols 7g33.3
10、 Abbreviations . 7g34 HDR-DSRC 8g34.1 Operational characteristics . 8g34.2 Technical characteristics 10g34.2.1 Roadside unit 10g34.2.2 Onboard unit . 11g34.3 Protocol characteristics . 12g34.4 Interference characteristics . 12g35 Measurements . 13g35.1 Test architecture . 13g35.1.1 General approach
11、13g35.1.2 Test signals . 17g35.1.2.1 ITS test signal 17g35.1.2.2 HDR-DSRC test signal . 17g35.1.3 Test procedure 17g35.1.4 Test scenarios 18g35.2 Evaluation of test equipment 18g35.2.1 ITS station units 18g35.2.2 Equipment at the German test site 19g35.3 Tests . 20g35.3.1 No interference . 20g35.3.2
12、 Single interferer 20g35.3.2.1 Tests on toll plaza . 20g35.3.2.2 Tests in anechoic chamber 20g35.3.2.2.1 Test set-up A . 20g35.3.2.2.2 Test set-up B 22g35.3.2.3 Final tests on toll site. 23g35.3.3 Multiple interferers . 26g35.3.3.1 Tests on toll plaza . 26g35.3.3.2 Tests in anechoic chamber 28g35.4
13、Summary of results . 29g35.4.1 Critical scenarios 29g35.4.2 Coexistence scenarios . 29g35.4.3 Summary of performed tests and their results. 29g36 Mitigation techniques . 29g36.1 Techniques for CEN DSRC 29g36.2 Techniques for HDR-DSRC . 29g37 ETSI plug test . 29g3Annex A: Statistical prediction . 31g
14、3History 33g3ETSI ETSI TR 103 403 V1.1.1 (2017-06) 4Intellectual Property Rights Essential patents IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and no
15、n-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pu
16、rsuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present d
17、ocument. Trademarks The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tr
18、adename. Mention of those trademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Intelligent Transport Systems (ITS). Moda
19、l verbs terminology In the present document “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI del
20、iverables except when used in direct citation. Executive summary The present document is about mitigation techniques to avoid or lower harmful interference of ITS radio transmitters operating in the 5,9 GHz band upon 5,8 GHz backscatter communication systems used for e.g. electronic fee collection.
21、The present document comprises the evaluation of mitigation techniques specified in ETSI TS 102 792 i.7 and their applicability for the High Data Rate - DSRC (HDR-DSRC) technology standardized by UNINFO in Italy and by ETSI ES 200 674-1 i.1 used for road tolling. As a global result it can be conclud
22、ed that the mitigation techniques standardized in i.7 for the CEN-DSRC technology (also referred to as Medium Data Rate - DSRC (MDR-DSRC), and recently named TTT DSRC as the term to be used in the future) are sufficient to avoid harmful interference to HDR-DSRC. In order to perform the tests of whic
23、h the results are reported in the present document, off-the-shelf equipment was used and no further calibration was performed. The transmit power of the ITS signal in the 5,9 GHz band could be tuned from 10 dBm EIRP to 23 dBm EIRP. The length of the ITS signals in terms of number of bytes could be a
24、djusted within the limits allowed by this technology. The message repetition interval was set to either 10 ms or 100 ms. The HDR-DSRC system was operated with a test application (echo message of adjustable length), applying normal operational radio parameter settings (these could not be changed). Th
25、e performed measurements were compared with a statistical model presented in Annex A of the present document, which allows concluding whether the HDR-DSRC downlink, or the uplink, or both links are interfered. The performance results for the various test configurations with a single interferer and m
26、ultiple interferers, both conducted in an anechoic chamber and in a real road environment, indicate that harmful interference is only on the HDR-DSRC downlink. ETSI ETSI TR 103 403 V1.1.1 (2017-06) 5Coexistence scenarios were identified for HDR-DSRC, i.e. technical limits to mitigate harmful interfe
27、rence are: The ITS-SUs upper TX power limit is 14 dBm EIRP. The lower distance limit between a HDR-DSRC OBU and an ITS-M5 interferer transmitting with 23 dBm EIRP is 5 m. The ITS-M5 repetition interval of 100 ms is not resulting in harmful interference. Introduction With the birth of communications
28、in the 5 GHz bands i.2, i.3, i.4 for Intelligent Transport Systems (ITS) on the basis of the ITS station and communication architecture specified in i.6 and i.5 potential harmful interference caused by ITS equipment installed in vehicles on Electronic Fee Collection (EFC) and Electronic Toll Collect
29、ion (ETC) installations (toll plazas) became obvious. Two major standardized Dedicated Short Range Communication (DSRC) technologies are used in Europe and other regions for EFC/ETC and other road transport related services, i.e. the CEN-DSRC technology standardized by CEN (also referred to as TTT-D
30、SRC according to CEPT decision) and by ETSI in the European harmonised multi part standard ETSI EN 300 674-2-1 i.11, ETSI EN 300 674-2-2 i.12, and the High Data Rate - DSRC (HDR-DSRC) technology standardized by UNINFO in Italy and by ETSI ES 200 674-1 i.1. Both DSRC technologies operate in the same
31、band at 5,8 GHz. Initial interference tests and simulations were performed for MDR-DSRC i.8, and resulted in mitigation techniques standardized in i.7. These mitigation techniques were taken as basis for further investigations on HDR-DSRC. The present document: complements i.8 by presenting results
32、of investigations on interference of 5,9 GHz ITS communications on the HDR-DSRC systems; recommends mitigation techniques with reference to i.7; and suggests running of an ETSI plug test dedicated to HDR-DSRC. ETSI ETSI TR 103 403 V1.1.1 (2017-06) 61 Scope The present document reports about test exe
33、cutions and results of tests performed with equipment compliant with ETSI ES 200 674-1 i.1 (referred to as HDR-DSRC or CEN-DSRC) and equipment compliant with ETSI EN 302 663 i.4 operating in the 5 GHz frequency band (referred to as ITS-G5 or ITS-M5). The purposes of the tests are to identify potenti
34、al interference of ITS-G5 emissions on the HDR-DSRC communications used e.g. for electronic road tolling, and the evaluation of mitigation techniques specified in ETSI TS 102 792 i.7. 2 References 2.1 Normative references Normative references are not applicable in the present document. 2.2 Informati
35、ve references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) app
36、lies. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject
37、 area. i.1 ETSI ES 200 674-1 (V2.4.1) (05-2013): “Intelligent Transport Systems (ITS); Road Transport and Traffic Telematics (RTTT); Dedicated Short Range Communications (DSRC); Part 1: Technical characteristics and test methods for High Data Rate (HDR) data transmission equipment operating in the 5
38、,8 GHz Industrial, Scientific and Medical (ISM) band“. i.2 IEEE 802.11 (2016): “IEEE Standard for Information technology - Telecommunications and information exchange between systems local and metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and
39、Physical Layer (PHY) Specifications“. i.3 ISO 21215: “Intelligent transport systems - Communications access for land mobiles (CALM) - M5“. i.4 ETSI EN 302 663 (V1.2.1) (07-2013): “Intelligent Transport Systems (ITS); Access layer specification for Intelligent Transport Systems operating in the 5 GHz
40、 frequency band“. i.5 ETSI EN 302 665 (V1.1.1) (09-2010): “Intelligent Transport Systems (ITS); Communications Architecture“. i.6 ISO 21217 (2014): “Intelligent transport systems - Communications Access for Land Mobiles (CALM) - Architecture“. i.7 ETSI TS 102 792 (V1.2.1) (06-2015): “Intelligent Tra
41、nsport Systems (ITS); Mitigation techniques to avoid interference between European CEN Dedicated Short Range Communication (CEN DSRC) equipment and Intelligent Transport Systems (ITS) operating in the 5 GHz frequency range“. i.8 ETSI TR 102 960 (V1.1.1) (11-2012): “Intelligent Transport Systems (ITS
42、); Mitigation techniques to avoid interference between European CEN Dedicated Short Range Communication (RTTT DSRC) equipment and Intelligent Transport Systems (ITS) operating in the 5 GHz frequency range; Evaluation of mitigation methods and techniques“. i.9 Commsignia: “OB2-M/ITS-RS2-M User Manual
43、“; version: V1.7.5-b12, 3 (March 2015). i.10 Narda Safety Test Solutions: “SRM 3006 Selective Radiation Meter Operating Manual“. ETSI ETSI TR 103 403 V1.1.1 (2017-06) 7i.11 ETSI EN 300 674-2-1 (V2.1.1) (11-2016): “Transport and Traffic Telematics (TTT); Dedicated Short Range Communication (DSRC) tra
44、nsmission equipment (500 kbit/s / 250 kbit/s) operating in the 5 795 MHz to 5 815 MHz frequency band; Part 2: Harmonised Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU; Sub-part 1: Road Side Units (RSU)“. i.12 ETSI EN 300 674-2-2 (V2.1.1) (11-2016): “Transpor
45、t and Traffic Telematics (TTT); Dedicated Short Range Communication (DSRC) transmission equipment (500 kbit/s / 250 kbit/s) operating in the 5 795 MHz to 5 815 MHz frequency band; Part 2: Harmonised standard covering the essential requirements of article 3.2 of Directive 2014/53/EU; Sub-part 2: On-B
46、oard Units (OBU)“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in ETSI ES 200 674-1 i.1 and the following apply: ITS-G5: access technology to be used in frequency bands dedicated for European Intelligent Transport
47、 System (ITS) NOTE: Details of compliance are specified in ETSI EN 302 663 i.4 and ISO 21215 i.3. ITS-M5: communications technology operating in the 5 GHz bands allocated for ITS compliant with IEEE 802.11 i.2 NOTE: Details of compliance are specified in ETSI EN 302 663 i.4 and ISO 21215 i.3. 3.2 Sy
48、mbols For the purposes of the present document, the symbols given in ETSI ES 200 674-1 i.1 and the following apply: fcHDR DSRC downlink centre frequency fc,ITSITS-M5 centre frequency GOBUGain of the HDR-DSRC OBU antenna in bore-sight direction GRSUGain of the HDR-DSRC RSU antenna in bore-sight direc
49、tion NbundleNumber of HDR-DSRC test signals (ECHO.request) in a test bundle NsuccessNumber of successfully received HDR-DSRC test signals (ECHO.response) in a test bundle PlossProbability of lost HDR-DSRC test signals PoverlapProbability of an overlap of ITS test signal with interfered HDR-DSRC test signal PsuccessProbability of successfully received HDR-DSRC test signals Td1Duration of interfered HDR-DSRC test signal Td2Duration of interfering ITS test signal Td1dDuration of HDR-DSRC d
