ROLL Working Group IETF 72

In-Vehicle Routing Requirements in Low Power and Lossy Networks

Ryuji WakikawaHiroshi Kuwabara

Toyota InfoTechnology Center Co., Ltd.

ROLL Working Group IETF 72

Why in-vehicle networks

Current in-vehicle networks*In vehicles, wired harness have about 4000 parts, weight as much as 40kg. It includes more than 1900 wires for up to 4km.

Automotive sensor market volumes exceed 665 million units in USA and 2237 million units in global

Why wireless?Easy placement

tire pressure monitor sensorsRemoving cables from vehiclesCost of cabling inside a vehicle

*Intra-vehicular Wireless Networks by M. Ahmed, M. Ames*, T. ElBatt+, C. Saraydar*, T. Talty*, J. Yin, AutoNet 2007, HRL Laboratories, USA; *General Motors R&D, USA; +San Diego Research Center, USA; and #TrellisWare Technologies, USA

ROLL Working Group IETF 72

Characteristics and Requirements ECU (Electronic Control Unit), Ac

tuator, Sensor are all connected by several dedicated BUS systems in an automobile. CAN (Control Area Network), LI

N (Local Interconnect Network), FlexRay, MOST

Power Train, Chassis, Body, Infotainment, Drive Assistance Networks

Characteristics of in-vehicle network High density (piles of sensors

, ECUs, actuators) Wired/Wireless integrated netw

orks Obstacles(!) inside a vehicle

passengers, ski board, bicycle, etc.

long-term lifecycle

Routing Requirements Low Power Path Reliability Subnet Support QoS Support Scalability Latency Network Convergence (Wired/Wireless)

Manageability Mobility Security

ROLL Working Group IETF 72

Example Activity in Automotive Industry

ROLL Working Group IETF 72

Zigbee Propagation Measurement Estima (Previa named in USA) (MPV 1Box type) Hybrid Topology : Peer to Peer (Coordinator and End Device) CH ： 26ch fix （ 2480 ± 1 MHz don’t conflict 802.11b/g ) Tx Power ： 4dBm, Tx Packets ： 80bytes X 100 times

ROLL Working Group IETF 72

ZC

Coordinator

ZED

End Device

ZR

Router

2ndRoof

3rdLeft

3rdRight

2ndLeft

1stLeft

2ndRight

1stRight

Steering

Instrument Panel

1st1Roof

Cabin

Back end

042C

0572

0573

0568

056C

042D 0563

042B

040E

0431

0449

Zigbee Communication Measurement

ROLL Working Group IETF 72

Engine

Middle Up

Instrument Panel

Engine

Middle LowEngine

Left Low

Engine

Right Low

0572

04260432

043D0428

Engine Room

Engine

Inverter Module

Zigbee Communication Measurement

ROLL Working Group IETF 72

References

Intra-vehicular Wireless Networks, M. Ahmed, M. Ames*, T. ElBatt+, C. Saraydar*, T. Talty*, J. Yin, AutoNet 2007

Design And Realization of An IP-Based In-Car Network Architecture, Rainer Steffen, et.al, ISVCS 2008