Activities on Advanced ITS Radiocommunications Document No: GSC17-PLEN-36 Source: ARIB Contact: Takeshi YAMAMOTO GSC Session: PLEN Agenda Item: 6.5 Activities on Advanced ITS Radiocommunications Takeshi YAMAMOTO Senior Researcher, ITS Group, ARIB

Highlight of Current Activities Consideration on frequency usage in Japan Telecommunications Council considered and reported on Technical Requirements for ITS Radio System in 700 MHz band. Radio Regulatory Council considered and reported on legal revision for the usage of Safe Driving Support Systems in 700MHz band. A part of 700 MHz band has been allocated for ITS safety applications in December, 2011 Standardization Feasibility test guideline; “ITS Forum RC-006” was developed in ITS Info-Communications Forum. Based on RC-006 and feedback from feasibility tests, ARIB standard has been developed and released in February, 2012. ARIB STD-T109, “700 MHz Band Intelligent Transport Systems(ITS)”

Strategic Direction Contribute to reduction of the number of traffic fatalities and serious injuries by deploying Cooperative Safe Driving Support Systems using V2V and I2V communications. Effective utilization of radio frequency for ITS in 700MHz band, available from April 2013. International harmonization will be considered for efficient deployment.

Cooperative Activities in ITU-R SG5 WP5A Development of a new technical report; “advanced ITS radiocommunications” was proposed by Japan in November, 2009. Since then, Korea and Japan have actively contributed. ETSI TC ITS was invited to the activity, and contributed for the input from Europe. Report ITU-R M.2228 Advanced ITS radiocommunications has been developed based on contributions from Europe, Korea and Japan, and approved at WP5A and SG5 meetings in November, 2011.

Contents of Report ITU-R M.2228 Advanced ITS Radiocommunications 1 Background 2 Characteristics of Advanced ITS radiocommunications 2.1 Terms and definitions 2.2 Acronyms and abbreviations 2.3 Technical characteristics 3 Requirements for Advanced ITS radiocommunications 3.1 General system requirements 3.2 Service requirements 4 Status of Advanced ITS radiocommunications 4.1 Japan 4.2 Korea (Republic of) 4.3 Europe 5 Reference http://www.itu.int/pub/R-REP-M.2228

Challenges ITS standardization activities are in progress in each Standardization Organization and the region. Exchange of information on the existing ITS related standards and current ITS standardization activities should be facilitated Coordination of ITS standardization activities is desirable to avoid conflicting standards.

Next Steps / Actions Activities toward international harmonization are expected to achieve efficient deployment of Advanced ITS radiocommunications systems. ARIB will contribute to the harmonization activities in ITU-R, AWG and GSC. Revision to Report ITU-R M.2228 has started in WP5A for further sharing information, and call for contribution to the revision work. WP5A Chairman's report, November 2012 Annex 20. “Working document towards a preliminary draft revision of Report ITU-R M.2228 - Advanced intelligent transport systems (ITS) radiocommunications”

Supplementary Slides

Comfort and convenience Purpose of ITS Systems to resolve problems of road traffic by reducing traffic accidents, mitigating congestion, improving environmental efficiency, etc. Safety Reduction of traffic accidents Safe Driving Support Systems for reduction of traffic accidents Hazard avoidance ITS Applications Comfort and convenience Environment Reduction of environmental impact Smoother traffic flow Transportation management Reduction of carbon dioxide emissions Congestion mitigation

Analysis of Traffic Accidents in Japan 80% of traffic accidents occur at intersections or locations with poor visibility. 70% of traffic accidents are caused by failure to recognize a hazard in time. [ Types of traffic accidents] [ Types of human error] Collisions with pedestrians Errors in operation 9% Other Collisions with cross traffic at intersections 26% Errors in judgment Rear-end collisions 32% 70% 14% Right-turn or left-turn collisions Failure to recognize a hazard in time Non-Line of Sight Communications will be effective for Safe driving support systems.

Characteristics of 700MHz band In comparison of 5.8GHz band Reach longer distance Cover wider area Diffract to behind buildings Suitable for vehicle to vehicle communications at blind intersection 700MHz band would be better spectrum for Safe Driving Support System which requires high reliability. Various verification tests and R&D conducted to realize vehicle to vehicle communications for Safe Driving Support System

700MHz band frequency arrangement in Japan Previous frequency allocation Refarming Mobile Phone ↑ 800 710 BAS/ Radio Microphones To other bands 　　　　　　　　　　　　　　　　　 770　　　　　　 　　 806 810 815　　 845 ↓ Analog and Digital TV microphones Radio Option A AWG Harmonised FDD Arrangement of 698-806 MHz band 703 748 758 803 ITS ITS: Safe Driving Support Systems Available from April, 2013 9 MHz 　　　　　 　 718 　　　　　 　 748 760 773　　 　　　　 803 815　　 　　 845 Digital TV 718 Option B 773 Mobile Phone New frequency allocation BAS: Broadcast Auxiliary Service APT-AWF-REP-14; http://www.aptsec.org/sites/default/files/APT-AWF-REP-14_APT_Report_Harmonized_Freq_Arrangement.doc

700MHz band Intelligent Transport systems ARIB STD-T109 700MHz band Intelligent Transport systems Basic Parameters Operating frequency: 760MHz (Single channel) Occupied bandwidth: Less than 9MHz Modulation: BPSK/OFDM, QPSK/OFDM, 16QAM/OFDM Number of subcarriers: 52 Error correction: Convolution code R = 1/2, 3/4 Data transmission rate: 3, 4.5, 6, 9, 12, 18Mbps Media access control: CSMA/CA http://www.arib.or.jp/english/html/overview/doc/5-STD-T109v1_0-E1.pdf

ARIB STD-T109 V2V and I2V Time Division Access V2V and I2V communications zone I2V interval Time V2V communications zone