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Similar to Company overview: Automotive + TTEthernet
Similar to Company overview: Automotive + TTEthernet (20)
Company overview: Automotive + TTEthernet
- 1. Ensuring Reliable Networks
Company Overview &
Overview Deterministic
Ethernet
Dr. Markus Plankensteiner
Director Industrial Solutions
markus.plankensteiner@tttech.com
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 1
- 2. Megatrend Safety Ensuring Reliable Networks
Safety Becomes Omnipresent
• Automotive: 50 million injuries, out of those 1.2 million were fatal injuries
(3.300 per day according to WHO 2010)
• Industrial: Manufacturers lose over $ 20 billion each year in safety incidents
(Norm Gilsdorf, President of Honeywell Process Solutions at Honeywell User
Group 2010)
• Civil Aviation: In 2010 there were 47.3 million flight hours and 22.3 million
departures with 9 serious accidents
• Smart and safe mega cities
• Medical systems and healthcare for aging populations
• By 2020 every second embedded device will be safety relevant
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 2
- 3. TTTech Vision based on
Safety Platform Ensuring Reliable Networks
TTTech Provides Electronic Robustness
to a More Electric World
High High
Availability Reliability
for Wind, for Smarter
Green and
Power & More Electric
Grid Vehicles on
Automation Land & in
the Air
Ethernet That Always Delivers
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 3
- 4. What do they have in common … Ensuring Reliable Networks
Boeing 787 NASA Orion
… Reliable Networks and Controls from TTTech
Audi A8 Prinoth Leitwolf
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 4
- 5. Since 1998 TTTech has
Developed Succesfully … Ensuring Reliable Networks
TTTech Konzern
Betriebsleistung 48%
• Unique time-triggered and 35 33
safety know-how pool of 230+ 30
28% 2011
employees 25 22,3
MEUR
20 17,4
• Dynamic growth 2010
15
• Strong equity position 2009
10
• International footprint 5
0
• 16 M€ invest in R&D in 2011 Years
• Case study coverage
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 5
- 6. Elements of the TTTech
Cross-Industry Safety Platform Ensuring Reliable Networks
Dependable Modular
Communication Safety
with Controllers
Chip IP, ASIC Cert Packages SafeExe, Cert Package
DO-254 DO-178B/C SafeCOM, Safety Manual
ISO 61508 SafeMon
App. 1 App. 2 App. 3 App. 4
SafeCrossCheck
Checkpoint Checkpoint
„SafeApp1“ „SafeApp2“
SafeDispatcher
E2E-Lib
SafeCOM
Bootloader
OS
RTE
SafeSelfCheck
Checkpoint
„SafeCDR“
System Memory Comm.
Comm. I/O Complex
Services Services Services Services Drivers
SafeHAL BSP
Tools & Test Equipm. CPU & Safety I/O Blocks &
Middleware & Switches Companion Drivers
Partition 1 Partition 2 Ta
Partition
Task Task Task Task
1A 1B 2A 2B 3 sk
Partition
Partition OS Partition OS 3A
OS
IMA OS
Core TTE-COM Layer
Message
OS TTE-API 653
ARINC Channel API
Library Core OS Services
TTE-PCI
T R B
T Driver
HardwareE
C
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 6
- 7. Cross-Industry Safety &
Certification Ensuring Reliable Networks
Design assurance standards are similiar across industries
DO 178B / 254 ISO 26262 EN/ISO 13849 IEC 61508
System approaches are different
Fail-Stop Fail-Operational
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 7
- 9. Automotive Production Program Reference
Audi A8 Ensuring Reliable Networks
Communication Software
• FlexRay, CAN, LIN, Tools
• Performance optimized
Communication Safety Software
• End-to-end safety on FlexRay and CAN
• ISO 26262 ASIL D
Process Optimization
• Automated ECU Validation
• Testbench automation
Premium Engineering
• 10 Mbit/s physical layer
• Stable parameterizing and interoperability
• Software integration and prototype support
• Diagnostics specification
• Representation in FlexRay Consortium
Audi A8, A6, A4, … VW Touareg, … Bentley Arnage, Continental
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 10
- 10. Automotive Portfolio Ensuring Reliable Networks
Reliable Networks and Safe Communication
Reliable Networks and Safe Communication
Embedded Safety Safety Hardware for Testing Tools
Software E-Vehicles
• AUTOSAR Safe up to ASIL D • Modulare Safety Platform • Data Logger
• SafeCOM • IEC 61508 / ISO 26262 • FlexRay Tools
• SIL 2-3
Networks & Engineering
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 11
- 11. AUTOSAR Safety Software
Cooperation with Vector Informatik Ensuring Reliable Networks
Microsar Safe
up to ASIL D
with TTTech
Safety Modules
• Safety Elements out of Context (SEooC) according ISO 26262
• TTTech safety modules integrated with Vector MICROSAR
AUTOSAR BSW
• Certified or certifiable up to ASIL-D
• Integration according to Integration Safety Manual (ASM)
• AUTOSAR 3.0/1, 4.0, CANbedded, MICROSAR Safe
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 13
- 12. Modular Safety Controller
Roadmap Ensuring Reliable Networks
Aerospace & Automotive Off-Highway Industrial
Railway Special Purpose
Markt Expertise
Modular Safety Controller Roadmap
VCU90 ASIL C VCU500 ASIL D ISU500 ASIL D
ISO 26262 ISO 26262 ISO 26262
ISU90 ASIL C TTC500 SIL 3 FP ASIL D
ISO 26262 EN 13849 Pl E ISO 26262
Automotive
ECU TTC100 / TTC200 TTC90 SIL 2 VGSF500 SIL 3 EVECU ASIL D
Background IEC 61508 SIL 2/3 EN 13849 Pl D Industrial ISO 26262
1990 2003 2008 2010 2011 2012
Customer Program Hybrid ASIL D
ISO 26262
Customer Program Chassis
ISO 26262 ASIL D
Customer Program EV
ISO 26262 ASIL D
Customer-Specific Safety Controller Roadmap
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 14
- 13. Inverter Safety Unit (ISU) Ensuring Reliable Networks
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 15
- 14. Electric Rear Wheel Drive Ensuring Reliable Networks
Safety Control Unit
• ISO 26262 ASIL-D
• Drive function including torque vectoring
• Safety algorithms for monitoring
• SOP 2015
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 16
- 15. Data Logging Solution Ensuring Reliable Networks
TTXDataLogger
Key Features
• Complete vehicle data logging (all)
• Filtered and triggered data logging (selective)
• Precise timestamp (1 µs resolution)
• Measurement and calibration (CCP / XCP)
• API for sending and receiving (freely programmable)
• Central access to all bus systems via Ethernet
• Multi-step intelligent power management (sleep / deep sleep)
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 17
- 16. Ensuring Reliable Networks
TTEthernet – SAE AS6802
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 18
- 17. Integrated Service Delivery in a
Single Ethernet Network Ensuring Reliable Networks
Synchronous
• SAE AS6802 clock synch
(IEEE 1588 compatible)
• Real-time control
• Ultra-low latency
• Safety systems
Available and Safe
Streaming
Automotive Ethernet
• ARINC 664
• Rate-constrained
• Audio/video
• Sensor fusion
Ethernet (IP)
• IEEE 802.3 standard traffic
• Best effort (IP)
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 19
- 18. Encapsulated Data Streams for Safety
and Availability Ensuring Reliable Networks
ISO 26262 ASIL D
(IEC 61508 SIL 3)
Data Stream Encapsulation
• TTEthernet controls data rates and
arrival timing against pre-set allocation
Synchronous
Traffic
tables
• Policing of data rates is enforced by
the switch
Rate Constrained
Streaming Traffic
• Based on TDMA scheme with Available and Safe
clock-synchronization Automotive Ethernet
Background raffic
Safety Argument
Best Efforf
• Data streams of different functionality
are protected against each other and
• Data streams of different criticality are
protected against each other
• By encapsulation
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 20
- 19. Technology Openness Ensuring Reliable Networks
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 21
- 20. TTEthernet Algorithms are
Standardized with SAE Ensuring Reliable Networks
Standard has been approved!
AS6802 "Time-Triggered Ethernet" is published by SAE
on November 1, 2011
http://www.sae.org/technical/standards/AS6802
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 22
- 21. Time-Triggered Networking
with TTTech Ensuring Reliable Networks
"We look forward to realizing the potential of TTEthernet
technology development, which provides a high bandwidth
• High-integrity, avionics databus capability supporting future technology
insertion.“
deterministic NASA statement
data network
communications
across
the vehicle
• Guaranteed
latency and
response time
for critical
sensors and
actuators
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 23
- 22. TTEthernet in Safety Management
Systems for Oil Platforms Ensuring Reliable Networks
100 Mbit/s TTEthernet variant
used with software-based
endpoints
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 24
- 23. TTEthernet in Offshore Wind
Turbines Ensuring Reliable Networks
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 25
- 24. Ensuring Reliable Networks
Automotive TTEthernet
Projects
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 26
- 25. OEM Projects (1) Ensuring Reliable Networks
• R&D project on validation of
TTEthernet for High-Definition
(HD)
• Lane detection, traffic sign
recognition and object
recognition
• TTEthernet switch with nodes
executing TTEthernet stack on
top of standard Ethernet
controller
• Camera application for HD
capturing, splitting, cropping,
encoding and transmission
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 29
- 26. OEM Projects (2) Ensuring Reliable Networks
Project 2
• Evaluation project with different topologies and traffic loads
• Comparison with MOST and standard Ethernet
Project 3
• Architecture study for infrastructure backbone
• Safety-critical and non safety-critical control applications
• Simulation model development
Project 4
• Evaluation of low-latency communication and compatibility with
AVB
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 30
- 27. OEM Projects (3) Ensuring Reliable Networks
Project 5
• Part 1: compatibility between TTEthernet, AVB and standard
Ethernet
• Part 2: partitioning, fault isolation and fault-tolerance
2 4
8
1 6 7
TTEthernet
TTEthernet Switch
Switch
`
3 5
TTEthernet
AVB
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 31
- 28. Ensuring Reliable Networks
What Automotive OEMs Say
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 33
- 34. Communication Solutions and
Safety Electronics for Audi Ensuring Reliable Networks
„Leadership in electronics is key for AUDI AG.
Therefore, reliable, deterministic communication
solutions and safety electronics from TTTech are
essential building blocks for our innovation roadmap“
- Ricky Hudi
Senior Vice President Electric/Electronic Development
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 42
- 35. Ensuring Reliable Networks
TTEthernet Products
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 48
- 36. TTEthernet Products – Overview
Ensuring Reliable Networks
Chip IP Development Systems
• Switches and End Systems • TTEDevelopmentSystem 1 Gbit/s v2.0
• Certification Package (RTCA • TTEDevelopment System 100 Mbit/s
DO 254) Configuration & Verification Tooling
Development Equipment • TTEBuild,
TTE Build Network
Switches TTEDev
Switch 1 Gbit/s 12 Ports Configuration
TTEDev
Switch 100 Mbit/s A664
Endpoints TTEPMC Card, TTEPCI Card
• TTELoad
TTEXMC Card, TTEPCIe Card • TTEView
Test and Simulation Equipment • TTEVerify (certification RTCA DO 178B)
• TTEMonitoring Switch 1 Gbit/s 12+1 Embedded Software
Ports • TTEProtocol Layer, TTEDriver and TTEAPI
• TTEMonitoring System Library
• TTEEnd System A664 Dev&Test • TTECOM Layer ARINC 653
• TTESync Library
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 49
Page 49
- 37. TTEthernet Development
Systems Ensuring Reliable Networks
TTEDevelopment System 100 Mbit/s
• TTEDevelopment Switch with 8 x 100 Mbit/s ports
• Two end system PCs with software-based TTEthernet as
Linux driver
• Configuration tools, development tools, TTEthernet API,
manuals
• Extendable demo application
in source code
Order Number: HE01.00.0
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 50
Page 50
- 38. Ensuring Reliable Networks
Safe and Available
Automotive Ethernet
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 51
- 39. Overview Ensuring Reliable Networks
• Automotive scenarios
• Integration of all traffic classes on Ethernet
• Buffering, partitioning
• Availability and safety
• Compatibility with standard Ethernet and AVB and
support for Broadcom PHY and other physical layers
• Chip IP and ASIC roadmap
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 52
- 40. Automotive Adoption
Scenarios for Ethernet Ensuring Reliable Networks
HU
Front-camera
Video
GW RSE
ECU
Diagnosis interface
Phase 1: Subsystem Level Phase 2: Architecture Level
• Ethernet at subsystem level • Ethernet backbone: integration
• Examples: camera links, driver of powertrain, chassis, body,
assistance system, multimedia multimedia, driver assistance, …
• One Ethernet switch chip per • Two or more Ethernet switch
car chips per car
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 53
- 41. Ethernet Requirements for
Phase 2 Ensuring Reliable Networks
Integration of all traffic classes on a single network
• Standard Ethernet traffic (IP)
• Multimedia (audio / video streaming)CAN CAN
Radio DVD
• Surround sensing (video, radar, …, streaming)
• Diagnostics, Car2x (IP)
Main Front Main Rear
• Control loops (real-time, synchronous) Controller
IR Controller
Switch RSE
Switch
Rear
Camera
Camera
(e.g. Chassis (e.g. Gateway)
• Safety (real-time, synchronous, ISO 26262 ASIL D)
Controller)
• …
Radar Body
Controller
FX FX
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 54
- 42. Ethernet Requirements for
Phase 2 Ensuring Reliable Networks
Integration of all traffic classes on a single network
• Standard Ethernet traffic (IP)
• Multi-Media (audio / video streaming)
• Surround sensing (video, radar, …, streaming)
• Diagnostics, Car2x (IP)
• Control Loops (real-time, synchronous)
• Safety (real-time, synchronous, ISO 26262 ASIL D)
•…
Availability
• Different traffic classes must not have adverse impact on each other
• Even if one or more senders or switches are faulty
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 55
- 43. Compatibility with AVB Ensuring Reliable Networks
1. Clock Synchronization
• 802.1AS clock synchronization frames can be sourced from AS6802
mechanisms safety argument
2. Traffic Shaping & Bandwidth Allocation
• Policing and traffic shaping supported
(slight differences between AVB and
ARINC 664)
• Dynamic bandwidth allocation supported
(lockable entries for safety)
Next Steps Availability
Safety
(Partitioning)
• AVB compatibility: definition of automotive
subset
• Opportunity AVB Gen 2: making AVB safe and
available (partitioning)
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 60
- 44. Ethernet Chip IP Roadmap Ensuring Reliable Networks
Phoenix Line
Phoenix Switch Phoenix End System
• 12x 1000 Mbit/s • 3x 1000 Mbit/s
• ARINC 664 p7, SAE AS6802 (2-FT) • AS6802 (2-FT)
• Off-chip COM/MON support • ARINC 664 p7 (without UDP/IP)
• On-chip mgmt. module • PCI/PCI express
Switch Switch (V&V) Switch ASIC
• Stratix IV • Stratix IV • 3rd party (ITAR)
End System End System (V&V) End System ASIC
• Stratix IV • Stratix IV • 3rd party (ITAR)
Pegasus Line
• 180MHz
Pegasus Switch • 768k RAMPegasus End System
• 6x 10/100/1000 Mbit/s • 3 MB Flash 3x 10/100/1000 Mbit/s
•
• 20x 10/100 Mbit/s • 16 PWM, 88DO 254 DAL A / SIL3 / ASIL D
• I/O
• DO 254 DAL A / SIL3 / ASIL D • SAE AS6802 MAC layer (1-FT)
• ARINC 664 p7, SAE AS6802 (2-FT) • ARINC 664 p7 UDP/IP layer
• On-/Off-chip COM/MON • Ext. Memory up to 16 MB QDR
• Ext. Memory up to 32 MB QDR • 32 bit PCI express, 16 bit A/D
• 16 bit A/D Mgmt. CPU I/F
Switch (development) Switch (certification) Switch (production)
• Altera Stratix IV • Altera Stratix IV • ASIC
End System (development) End System (certification)
• Altera Cyclone IV • Altera Cyclone IV
under
available planned
development
2010 2011 2012 2013 2014
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 61
Page 61
- 45. Chip Roadmap Ensuring Reliable Networks
Phoenix Line (Gen 2) IP
• Switch, client: FPGA-based solution available, space, aero and
landsystem use (e.g. NASA)
Pegasus Line (Gen 3) IP
• Fully scalable IP for switch and client
(100 Mbit/s and 1 Gbit/s ports)
• Safety: ISO 26262 ASIL D, DO 254 DAL A, IEC 61508 SIL 3
• Automotive, industrial and aerospace applications
• ASICs planned for 2014
• Compatible with BroadR-Reach© PHY
• Prototypes available
Software-based clients possible on µCs with Ethernet MAC
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 62
- 46. Ensuring Reliable Networks
Synchronous vs.
Asynchronous Communication
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 63
- 47. Ethernet = Asynchronous
Communication Ensuring Reliable Networks
X
Asynchronous Communication
Transmission Points in Time are not predictable
Transmission Latency and Jitter accumulate
Number of Hops has a significant impact
Usually solved by High Wire-Speeds & Low Utilization
and/or Priorities
Problem of ”Indeterminism” remains
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 64
- 48. Adding Clock Synchronization to
E
Ethernet TT
Ensuring Reliable Networks
E
TT
E
TT
Eth
E
TT
TT TT E
E E TT
E
TT
E
TT
Eth
Time Master
15
88
Enabler for Synchronous Operation:
88
15
Synchronized Global Time
Eth
Communication Schedule
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 65
- 49. Synchronous / Time-Triggered
Operation Ensuring Reliable Networks
Time-Division Multiple-Access Communication
Composable network
Complexity reduction and faster integration
Fault tolerant communication system
Node A send receive receive
t1 t2 t3
Node B receive send receive
t1 t2 t3
Node C receive receive send
t1 t2 t3 time
Slot
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 66
- 50. Synchronous Communication (TT)
Ensuring Reliable Networks
Synchronous Communication
X
Exactly one order of messages Mi
(in contrast to PERM(Mi) in async. comm)
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 67
- 51. Single-Master Clock
E
Synchronization TT
Ensuring Reliable Networks
E
TT
E
TT
Eth
E
TT
TT TT E
E E TT
E
TT
E
TT
Eth
Time Master
15
88
Enabler for Synchronous Comm.:
88
15
Synchronized Global Time
Eth
Communication Schedule
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 68
- 52. Fault-Tolerant Clock Synchronization
Ensuring Reliable Networks
E
Time Master TT
E
TT
E
TT TT
E
TT
E
Eth
E
TT
TT TT E
Time Master E E TT
E
TT
E
TT
Eth
Time Master
15
88
Fault-tolerant synchronization services 88
15
are needed for establishing a safe
global time base Eth
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 69
- 53. Ensuring Reliable Networks
TTEthernet Technical
Overview
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 70
- 54. Mixed-Criticality Systems Ensuring Reliable Networks
Open Networks
How to share system
resources
and partition critical and
non-critical distributed
Windows
PC
functions?
Windows
PC
Network
TTEthernet
Linux
Server
Standard IEEE802.3
Ethernet LAN
F2 F4 F1 F2 F3 F4
F1 F2 F3 F4
F1 F2 F4 Time and space Time and space
partitioned OS partitioned OS
Time and space
Time and space partitioned OS
partitioned OS
Safety-, Time- or Mission-Critical System
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 71
- 55. TTEthernet, a Communication
Infrastructure Ensuring Reliable Networks
Highlight: Flexible Integration
and COTS Backward Compatible
TTE TTE
ETH FX
TTE TTE
CAN
FX
CAN
FX
CAN
FX
CAN
<1 Mbit/sec
FX
< 10 Mbit/sec
TTP TTP TTP TTP
FX TTE TTE
1 Gbit/sec
100 Mbit/sec
TTE
TTE TTE TTE
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 72
- 56. TTEthernet for Mixed-Criticality
Systems Ensuring Reliable Networks
Enables robust partitioning of all computing and
networking resources in one system Application
• Fault-tolerant distributed clock
• Hard real-time communication Layer
(µs jitter, fixed latency) 3-7
• Host critical controls, video, audio, LAN, …
In parallel, two types of Ethernet communications:
Time-Triggered Extension
Synchronous (TDMA-style) Communication: TT
Asynchronous (event-triggered style): RC + BE Ethernet IEEE 802.3
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 73
- 57. Integrated Dataflow Example Ensuring Reliable Networks
TT BE TT BE TT BE t Dataflow – Integration
3ms cycle 3ms cycle 3ms cycle
- Time-Triggered (TT)
- Rate-Constrained (RC)
de
r - Standard Ethernet (BE)
en
S 1 Sw
it ch
/R ou er
ter eiv
R ec
r
de
en
S 2
TT TT RC BE TT TT BE BE TT RC TT TT BE t
TT BE BE TT RC TT BE 3ms cycle 3ms cycle 3ms cycle
t
2ms cycle 2ms cycle 2ms cycle 2ms cycle 2ms cycle 2ms cycle
2ms cycle
6ms Cluster Cycle
TTEthernet Switch is also capable of changing traffic types,
e.g. a message received as RC can be relayed as TT
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 74
- 58. Example: 1,000 Frames (Industrial-
Sized) 1
Ensuring Reliable Networks
2
5
3
Dataflow Links are enumerated 4 6
on the x-axis
RC/BE frames are also integrated
during TT phases.
12 …
RC
TT
RC
TT
RC
TT
RC
TT
Time-Triggered Only Time-Triggered
+ Event-Triggered
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 75
- 60. TTEthernet Advantages Ensuring Reliable Networks
• Compatible to IEEE 802.3 standard Ethernet
• Compatible with other standards (IEEE 1588, ARINC 664 and
partially with AVB)
• Support for different traffic classes – scalability and flexibility
• Fault-isolation: faulty component cannot affect the whole system
• Fault-tolerance and redundancy management
• Integrated security mechanisms
• Protection against masquerading and Denial of Service (DoS)
• Fault tolerant clock synchronization including security
• Certified mechanisms (clock sync, …)
• Integration of many functions/applications in one network
• Open technology – published as SAE AS6802 standard, IEEE
standardization planned
• Mature technology proven in several production programs
www.tttech.com Copyright © TTTech Computertechnik AG. All rights reserved. Page 77