Oki Electric Industry Co., Ltd.

SSC Wireless Technology R&D Division

Kiyohito TOKUDAtokuda315@oki.com

URL:http://www.oki.com/

Integrated Wireless Communications System between Inter-Vehicle and Road to Vehicle

Profile:Kiyohito Tokuda （徳田　清仁） - Born in Ishikawa, Japan on December 13, 1957.- Received the B.E., M.E. and Dr. of Eng. degrees in electrical engineering from Hosei University in 1981, 1983 and 1996, respectively. - Joined Electronic and Communication Systems Laboratory, Research and Development Group, Oki Electric Industry Co., Ltd. in 1983. - Since then, I have engaged in research on the mobile data transmission technology and the signal processing technology. - General Manager of Wireless Technology Research & Development Division. - Lecture of Saitama National University & Hosei University in Japan- Current research interests include UWB, W-LAN and ITS.

Hello!

・ Introduction　　 - Oki’s Wireless Technology for DSRC Systems

- Classification of Telematics Services - RVC & IVC Standard in Japan - Frequency arrangement of DSRC System

・ RVC System for Convenience & Amusement Driving - Protocol Stack of RVC System - RVC Wireless Equipment

- IVC System for Comfortable & Safety Driving　　 - IVC Prototype System - On –board Image

・ AVC(Advanced Vehicle Communications) System development - Concept op AVC System - Protocol Stack of AVC System

・ Future Mobile Life Produced by AVC System　　　

- Conclusion

CONTENTS

Commercial stage R&D stage

◇VICS(Vehicle Information & Communication System) (2.5GHz)

ETC(Electronic Toll Collection) (5.8GHz)◇

RVC （ Road- Vehicle Communications ）◇Information Shower System (5.8GHz)◇ROF-RVC System (5.8, 60GHz)IVC （ Inter-Vehicle Communications ）◇Instant Multimedia Communicator (5.8GHz)◇Advanced Safety Vehicle System (5.8GHz)

Oki’s Wireless Technology for DSRC Systems

DSRC:Dedicated Short Range Communications

Classification of Telematics Services

情報鮮度

新しい

古い

携帯電話を利用

-盗難防止、追跡-緊急通報-地図情報更新-交通情報-地域情報

コスト：通信費

高

低

エリア狭い 広い

DSRC型IVCを利用-走行支援情報提供

DSRC型RVCを利用

-走行支援情報提供

情報鮮度

新しい

古い

携帯電話を利用

-盗難防止、追跡-緊急通報-地図情報更新-交通情報-地域情報

携帯電話を利用

-盗難防止、追跡-緊急通報-地図情報更新-交通情報-地域情報

携帯電話を利用

-盗難防止、追跡-緊急通報-地図情報更新-交通情報-地域情報

コスト：通信費

高

低

エリア狭い 広い

DSRC型IVCを利用-走行支援情報提供DSRC型IVCを利用-走行支援情報提供

DSRC型RVCを利用

-走行支援情報提供

DSRC型RVCを利用

-走行支援情報提供

Cost of Communication

Free

High

Use of Cellular Phone・ Prevention of theft / Chase stolen vehicle・ Emergency call・ Update map information・ Traffic information・ Area information

Use of DSRC Type IVC・ Supply of information for driving assistance

Use of DSRC Type RVC & W-LAN・ Supply of information fordriving assistance

Service Area

WideSpot

Old

Freshness of Information

NewNew TelematicsNew Telematics

Internet Connection

AVC System

RVC & IVC Standard in Japan Road to Vehicle communication

ARIB STD-T75T75 based

Inter- Vehicle communication (draft)

Frequency band 5.8 GHz band 5.8 GHz band

# of channel 14 ch 10 ch

Occupied frequency band 4.4 MHz 4.4 MHz

Transmit rate 1M/4Mbps 4Mbps

Modulation/Demodulation scheme

ASK／ QPSK QPSK

Transmit power 25dBm（ base station）10dBm（mobile station）

10dBm

MAC TDMA CSMA

Service area ～ 30 meters Several hundred meters

Mobility Take Shortening Link Establishment Time into Consideration

Interference from other system

No interference（ assign dedicated frequency）

Real-time nature - Connection oriented- Guaranteed Real Time

- Connectionless- Guaranteed Real Time

System capacity Slot Number Assignment（ Max 8 Slot/1Ch ）

（ 120 Vehicles）

Frequency Arrangement of DSRC System

[GHz]5.815 5.820 5.825 5.830 5.835 5.840 5.8455.775 5.780 5.785 5.790 5.795 5.800 5.805 5.810

[GHz]5.830 5.835 5.840 5.8455.790 5.795 5.800 5.805 5.810

ARIB STD-T55Frequency

Arrangement

ARIB STD-T75Frequency

Arrangement

Up LinkDown Link

Up LinkDown Link

D7 D6 D5 D4 D1 D3 D2 U7 U6 U5 U4 U1 U3 U2

D1 D2 U1 U2

8 MHz

4.4MHz

Arrangement interval is packed and a channel is established newly.Frequency interval・ 10 MHz → 5 MHzOccupancy frequency band width・ 8 MHz → 4.4 MHz

（注） D1 D7 Carrier Number Down Link～ ： （ ） U1 U7 Carrier Number Up Link～ ： （ ）

Carriers with thesame carrier number

become a pair incommunication.Interval : 40MHz（ ）

ARIB:Association of Radio Industries and Businesses

ETC

Applications (ETC)

DSRC L1

DSRC L2

ELCP

PPP Ethernet

TCP

PPPCPLANCPLPCPLPP

OSI

PHYSICAL

DATALINK

NETWORK

TRANSPORT

SESSION

PRESENTATION

APPLICATION7

6

5

4

3

2

1

IP

HTTP etc.DSRC L7

Applications

WWW

Protocol Stack of RVC System

Ｔ８８

Ｔ７５

RVC Wireless Equipment

Core Device

・ＭＡＣ Module

・ RF Module

IVC Prototype System

■ Feature ・ Transmit Multimedia data including Movie, Still picture and Voice to

surrounding vehicle at any time, anywhere, anyone. MPEG4 En-cording ・ Quick Access between Vehicles without Base Station ・ Real-time & High quality data transmission performances satisfy the required

QoS. Data Transmission Rate : 4Mbps (ARIB STD T75 based)

On-board Image

Speaker

Inter-VehicleCommunication unit

Microphone

CCD camera

MPEG-4Decorder

MPEG-4Encorder

Antenna

Top

Front

Back

Inside

Display

Concept of AVC System

• Needs of driver and fellow passenger are “Comfortable” and “Safety” in addition to “Convenience” and “Amusement.”

• Improvement in “Safety” is indispensable in order to advance the conventional Telematics services which offers “ Comfortable”, “Convenience” and “Amusement.”

• To realize both “ Comfortable” and “Safety” requirements, DSRC-IVC system which took QoS into consideration to the maximum extent is effective.

• “Convenience” and “Amusement” services are also provided by DSRC-RVC

systems as well as mobile phone systems.

⇒AVC (Advanced Vehicle Communications) System integrated with DSRC-IVC and DSRC-RVC systems provides triple mode services(ETC, Information Shower, Safety).

Protocol Stack of AVC System

①Network Applications②Non-network Applications③ETC, Information Shower④Inter-Vehicle Communications

③

②

DSRC L1

DSRC L2

DSRC L7

ELCP

PPPEthernet

TCP/ IP

T88

T75

PPPCP LANCP LPCP

LPP

①

③

Dolphin

④②

DSRC L1

DSRC L2

DSRC L7

ELCP

PPPEthernet

TCP/ IP

PPPCP LANCP LPCP

LPP

①

Dolphin

④

IVC

RVC

Cooperation at application level

There is a parkedvechicle in front.

A vehicle isapproaching from the

right front.

IVC radio beacon

Road repairing isbeing done in front.

A motorcycle isapproching from the

back.

A vehicle isapproaching.

Multihopcommunication

ETC

A vehicle isapproaching

DSRCInfomation shower

Center

Internet

Future Mobile Life Produced by AVC System

Conclusion

• AVC system provides triple mode services. (ETC, Information Shower, Safety)

• AVC prototype system will be developed until the end of financial 2005 year.