Global Standardization of Network & Transport Protocols

ETSI TC ITS Workshop, 4.-6. February 2009

of Network & Transport Protocols for ITS with 5GHz Radio Technologies

Dr. Andreas FestagTC ITS WG3 Chairman

andreas.festag@nw.neclab.eu

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Index

� Part 1: Overview of TC ITS WG3

� Objectives, links & liaisons� Technical approach� Status and work plan

� Part 2: Analysis of ITS Networking Approaches

� Overview of selected approaches� Comparison

ETSI TC ITS Workshop, 4.-6. February 2009

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Working Group Objectives

� Protocols for network and transport and their manag ement� Network architecture and its harmonization with ITS architecture� Novel communication protocols for ITS

• Ad hoc and multi-hop routing protocols• Reliable transport protocols over multi-hop routing , …

� IP integration incl. solutions for IP mobility, � IP integration incl. solutions for IP mobility, � Internetworking between different access networks� …

ETSI TC ITS Workshop, 4.-6. February 2009

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Links to Other Bodies, Projects, Organizations

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Technical Approach (1)

Current WG focus� Ad hoc & multi-hop networking for short range wirel ess tech.� Vehicle-to-vehicle and vehicle-to-roadside communic ation

Time x

5ETSI TC ITS Workshop, 4.-6. February 2009

Time x

Time x + 2 sec

Solution needed to cope with frequent changes in network topology

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Technical Approach (2)

ETSI TC ITS Workshop, 4.-6. February 2009

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Technical Approach (3)

� Use of geographical positions for packet routing ov er short-range wireless technology

� “Geonetworking” for highly optimized networking in VANETs� For safety and infotainment applications

� Dissemination of safety event-driven information in geographical areas

7

areas� Heartbeat: broadcast of periodic information to nei ghbor nodes� Unicast: e.g. for local information

ETSI TC ITS Workshop, 4.-6. February 2009

Geographic UnicastGeographic Broadcast

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Technical Approach (4)

ReliabilityEfficiency

8ETSI TC ITS Workshop, 4.-6. February 2009

InternetIntegration

DataSecurity

Privacy

Challenges

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ITS Network Architecture Under Discussion (1)

9ETSI TC ITS Workshop, 4.-6. February 2009

Flexible architecture allows for various deployment scenarios

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ITS Network Architecture Under Discussion (2)

ETSI TC ITS Workshop, 4.-6. February 2009

ITS Station Protocol Stack ITS Station Components

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RequirementsScenariosNetwork Architecture

Base specificationGeoNetworking media-independentGeoNetworking media-dependent 5GHzIPv6 integrationBasic transport protocol

Status and Work Plan

10/2008 10/2009 10/201004/2008 04/2009 04/2010

Test specificationGeoNetworking media-independentGeoNetworking media-dependent 5GHzIPv6 integrationBasic transport protocol

TestingConformance testsInteroperability tests

C2C-CCDemo

ITS World Congress

ETSI TC ITS Workshop, 4.-6. February 2009

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Part 2: Analysis of ITS Networking Approaches

ETSI TC ITS Workshop, 4.-6. February 2009

GeoNetworking(ETSI TC ITS)

FAST(ISO TC 204)

WSMP(IEEE 1609)

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WSMP

� WAVE Short M essage P rotocol � High rate, low latency communication between WAVE devices on top of IEEE 802.11p

� Broadcasting of WAVE Short Messages to multiple (registered) applications(registered) applications

� Without WBSS (only on control channel), with WBSS (on control and service channel)

� UDP/TCP/IPv6 in parallel to WSMP

� Security header/trailer

ETSI TC ITS Workshop, 4.-6. February 2009

Source: IEEE Std 1609.3™-2007

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FAST: CALM Non-IP Networking“CALM Communication Kernel”

� High rate, low latency communication between CALM stations

� On top of interface abstraction (LLC extension, “virtual (LLC extension, “virtual channels”)

� Protocol has two phases� Service initialization

(announcement, optional confirmation), broadcast

� Service operation, unicast/broadcast

ETSI TC ITS Workshop, 4.-6. February 2009

Source: ISO/DIS 21217, Communications Access for Land Mobiles (CALM) - Architecture

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Comparison

WSMP FAST GeoNetworking

# Hops Single-hop Single hop Single-hop & Multi-hop

Communication Mode

Broadcast Broadcast & Unicast

Broadcast, Unicast, Geo-Broadcast,

Geo-Anycast

ETSI TC ITS Workshop, 4.-6. February 2009

Geo-Anycast

Group addressing

Via WBSS Via Service initialization

No BSS concept, but geo-addressing

Security Yes ? Yes (Optional?)

Wireless media IEEE 802.11pWAVE

Interface abstraction for

M5, IR, MM

Media-independent and media-dependent

part (e.g. for ITS European profile of

IEEE 802.11)

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Conclusion

� Currently, three ITS networking protocols are bein g standardized� Overlapping standards under development, with subst antial

technical differences between approaches� “Profiling” would allow to create a sets of global ITS standards

and to select technological components, such as “re gional” network protocols

ETSI TC ITS Workshop, 4.-6. February 2009

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THANK YOU FOR YOUR THANK YOU FOR YOUR ATTENTION

ETSI TC ITS Workshop, 4.-6. February 2009