1. 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

2. 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, ARIB STD-T109, “700 MHz Band Intelligent Transport Systems(ITS)”

3. 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.

4. Cooperative Activities in ITU-R SG5 WP5A
Development of a new technical report; “advanced ITS radiocommunications” was proposed by Japan in November, 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.

5. 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

6. 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.

7. 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 Advanced intelligent transport systems (ITS) radiocommunications”

8. Supplementary Slides

9. 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

10. 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.

11. 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

12. 700MHz band frequency arrangement in Japan
Previous frequency allocation
Refarming
Mobile
Phone ↑
800
710
BAS/
Radio Microphones
To other bands
　　　　　　　　　　　　　　　　　 770　　　　　　 　　 　　 ↓
Analog and Digital TV
microphones
Radio
Option A
AWG Harmonised FDD Arrangement of MHz band
703
748
758
803
ITS
ITS: Safe Driving Support Systems
Available from April, 2013
9 MHz
　　　　　 　 718 　　　　　 　 　　 　　　　 　　 　　 845
Digital TV
718
Option B
773
Mobile Phone
New frequency allocation
BAS: Broadcast Auxiliary Service
APT-AWF-REP-14;

13. 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

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