Global Standardization
of Network & Transport Protocols
for ITS with 5GHz Radio Technologies
Dr. Andreas Festag
TC ITS WG3 Chairman
andreas.festag@nw.neclab.eu
ETSI TC ITS Workshop, 4.-6. February 2009
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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 management
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,
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 wireless tech.
Vehicle-to-vehicle and vehicle-to-roadside communication
Time x
Time x + 2 sec
Solution needed to cope with frequent changes
in network topology
ETSI TC ITS Workshop, 4.-6. February 2009
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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 over shortrange wireless technology
“Geonetworking” for highly optimized networking in VANETs
For safety and infotainment applications
Dissemination of safety event-driven information in geographical
areas
Heartbeat: broadcast of periodic information to neighbor nodes
Unicast: e.g. for local information
Geographic Broadcast
Geographic Unicast
ETSI TC ITS Workshop, 4.-6. February 2009
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Technical Approach (4)
Efficiency
Reliability
Challenges
Data
Security
Internet
Integration
Privacy
ETSI TC ITS Workshop, 4.-6. February 2009
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ITS Network Architecture Under Discussion (1)
Flexible architecture allows for various deployment scenarios
ETSI TC ITS Workshop, 4.-6. February 2009
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ITS Network Architecture Under Discussion (2)
ITS Station Protocol Stack
ITS Station Components
ETSI TC ITS Workshop, 4.-6. February 2009
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Status and Work Plan
Requirements
Scenarios
Network Architecture
Base specification
GeoNetworking media-independent
GeoNetworking media-dependent 5GHz
IPv6 integration
Basic transport protocol
Test specification
GeoNetworking media-independent
GeoNetworking media-dependent 5GHz
IPv6 integration
Basic transport protocol
Testing
Conformance tests
Interoperability tests
C2C-CC
Demo
04/2008
10/2008
ITS World
Congress
04/2009
10/2009
04/2010
ETSI TC ITS Workshop, 4.-6. February 2009
10/2010
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Part 2: Analysis of ITS Networking Approaches
GeoNetworking
(ETSI TC ITS)
WSMP
(IEEE 1609)
ETSI TC ITS Workshop, 4.-6. February 2009
FAST
(ISO TC 204)
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WSMP
WAVE Short Message Protocol
High rate, low latency
communication between WAVE
devices on top of IEEE 802.11p
Broadcasting of WAVE Short
Messages to multiple
(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
Source: IEEE Std 1609.3™-2007
ETSI TC ITS Workshop, 4.-6. February 2009
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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
channels”)
Protocol has two phases
Service initialization
(announcement, optional
confirmation), broadcast
Service operation,
unicast/broadcast
Source: ISO/DIS 21217,
Communications Access for Land Mobiles (CALM) - Architecture
ETSI TC ITS Workshop, 4.-6. February 2009
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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
Group
addressing
Via WBSS
Via Service
initialization
No BSS concept, but
geo-addressing
Security
Yes
?
Yes (Optional?)
Wireless media
IEEE 802.11p
WAVE
Interface
abstraction for
M5, IR, MM
Media-independent
and media-dependent
part (e.g. for ITS
European profile of
IEEE 802.11)
ETSI TC ITS Workshop, 4.-6. February 2009
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Conclusion
Currently, three ITS networking protocols are being standardized
Overlapping standards under development, with substantial
technical differences between approaches
“Profiling” would allow to create a sets of global ITS standards
and to select technological components, such as “regional”
network protocols
ETSI TC ITS Workshop, 4.-6. February 2009
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THANK YOU FOR YOUR
ATTENTION
ETSI TC ITS Workshop, 4.-6. February 2009