architecture of telematics systemsconti/presentations_2020/c03... · 2020. 10. 15. · confidential...

Architecture of Telematics Systems

Course 3

continental-automotive.com VNI

Andreea Gradinaru © Continental AGConfidential / Internal

Continental Automotive Romania2

14 October 2020

WE ARE HMI

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14 October 2020

WE ARE HMI

1. Introduction

• Telematics Systems

• Continental products

2. Architecture

• Hardware view

• Architecture role

• Best practices

3. Case Study

Agenda



14 October 2020

WE ARE HMI

1. Introduction



2. Architecture

• Hardware view


• Best practices

3. Case Study

Agenda



14 October 2020

WE ARE HMI

What is a Telematics System?



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✓ Telecommunication Informatics

✓ “Telematics is an interdisciplinary field that encompasses telecommunications, vehicular

technologies, for instance, road transportation, road safety, electrical engineering

(sensors, instrumentation, wireless communications, etc.), and computer science

(multimedia, internet, etc).” (https://en.wikipedia.org/wiki/Telematics)

✓ “Vehicle Telemetry – Tapping remotely into a car’s data systems provides lots of useful

services” (www.economist.com)

Telematics - #1

https://en.wikipedia.org/wiki/Telematics



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✓ Can be regarded as an evolution of telemetry (transmit measurements from the origin to

the location of computing and consumption without affecting control on the remote

objects).

Telematics - #2



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✓ Security

✓ Safety

✓ Navigation

✓ Entertainment

✓ Diagnosis

Features



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• Examples:

✓ Stolen vehicle tracking;

✓ Anti-theft alarm notification;

✓ Remote door (un)lock;

✓ Software updates Over-the-Air;

✓ Secure connection with OEM Backend;

Security

Figure 1: Secure connection with OEM Backend

- Use case: automatic crash notification



14 October 2020

WE ARE HMI

• Examples:

✓Automatic crash notification;

✓ Emergency assistance;

✓Vehicular communication system (V2V)

✓ Emergency Electronic Brake Lights;

✓ Cooperative Passing Assist;

✓ Forward Collision Warning;

✓ See-Through Sensor Sharing;

Safety

Figure 2: GPS vehicle tracking system



14 October 2020

WE ARE HMI

• Examples:

✓ Traffic information – eg: traffic

congestion, weather forecast;

✓Geofencing;

✓Point of interest download;

✓Turn by Turn Navigation Assistant;

Navigation

Figure 3: Representation of Geofence



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WE ARE HMI

• Examples:

✓Music / video downloading;

✓ Internet radio;

✓ Streaming content;

✓ Synchronization with home entertainment library;

✓ Establish high bandwidth connection → share with Head Unit and vehicle passengers;

✓ Video Conferencing;

Entertainment



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WE ARE HMI

• Examples:

✓ Detailed diagnosis scan – trigger:

remote / exceed certain thresholds;

✓ Performance data collection;

✓ Scan Diagnosis Trouble Codes;

Diagnostics

Figure 3: Representation of Diagnostics

(© image: vector.com)



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WE ARE HMI

Telematics System - @ Continental

https://www.continental-automotive.com/en-gl/Passenger-Cars/Vehicle-Networking/Connectivity-Telematics/Telematics

https://www.continental-automotive.com/en-gl/Passenger-Cars/Vehicle-Networking/Connectivity-Telematics/Telematics



14 October 2020

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1. Introduction



2. Architecture

• Hardware view


• Best practices

3. Case Study

Agenda



14 October 2020

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Hardware → Legacy & Entry Designs - #1

TCU

VuC

Features

Vehicle Bus

NAD

Features

Baseband

CAN, LIN, …

GNSS

2G

Figure 4: (Simplified) Representation of Legacy & Entry Design



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WE ARE HMI

• Components

✓ NAD (Network Access Device) → connection to cellular network (voice calls, SMS);

✓ VuC (Vehicle MicroController) → interface with vehicle bus, process point for

commands and calls;

• GNSS (Global Navigation Satellite System) → provider for location information

• Advantages: easy implementation of basic functionality, low cost solution

• Disadvantages: reduced set of features, low profitability, 2G nearing EOL

Hardware → Legacy & Entry Designs - #2



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Hardware → Mid & High End Designs - #1

TCU

VuC

CAN, LIN, FlexRay,

MOST, A2B, …SoC

APP

GNSS MDM

Figure 5: (Simplified) Representation of Mid & High End Design



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WE ARE HMI

• SoC → allows implementation of complex features – Internet connectivity, Over the air software update, remote diagnostics, navigation helpers

• 3G/4G/5G/etc. modems enable faster data speeds

• Extend connectivity options to WiFi, Bluetooth (Low Energy)

• Advantages: high quality, features

• Disadvantages: expensive

Hardware → Mid & High End Designs - #2



14 October 2020

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Architecture - #1

Figure 6: Semantic areas of UML 2.5.1

© https://www.omg.org/spec/UML/2.5.1

https://www.omg.org/spec/UML/2.5.1



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Architecture - #2

Figure 7: Responsibilities of the

Software Architecture Role



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Use a predefined template for Documentation

of Architecture across the company.

• For

• Overall

• Black Box

• White Box

• Interfaces

• Advantages:

• Uniformity (standardized structure);

• Readability (across different teams / projects);

• Disadvantage:

• Customization needed to the specifics of the project (addition / deletion);

• Example: https://arc42.org/download

Best practices - #1

https://arc42.org/download



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Loose coupling between building blocks

• Example: Inheritance, resource sharing, temporal, control;

• Reduce coupling – Eg: dependency inversion through interfaces, factories,

dependency injection;

• Advantages: Reusability, portability;

• Disadvantage: Complexity;

. Strong cohesion

• Separation of concerns – Eg: MVC (core vs. visualization & persistence;

Best practices - #2



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Keep It Stupid Simple (as brief as possible while as detailed as necessary) while it still is

• Appropriate (understandable) to the target group;

• Maintainable.

Best practices - #3



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Respect Single Responsibility principle.

• Eg: Open-Closed principle, encapsulation, abstraction (interfaces, layers, patterns, models & views);

• Advantages: robustness against change, extensibility, separation, avoid implicit assumptions regarding implementation;

• Disadvantages: higher number of classes + interfaces;

Best practices - #4



14 October 2020

WE ARE HMIUse an iterative approach for decomposition.

Best practices - #5

Use Case

Decomposition into

components

Responsibilities

& InterdependenciesDynamic

Behaviour

Interfaces

Black Box

View

White Box

View

Requirements

Figure 8: (Simplified) Representation of an iterative approach



14 October 2020

WE ARE HMI

Use architectural patterns. • Examples:

✓ Layers

✓ Microkernel

✓ Pipes & Filters

✓ Client – Server

✓ Master – Slave

✓ Event - bus

Best practices - #6



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Use the 4+1 architectural view.

Best practices - #7

Figure 9: 4+1 architectural view



14 October 2020

WE ARE HMI

1. Introduction



2. Architecture

• Hardware view


• Best practices

3. Case Study

Agenda



14 October 2020

WE ARE HMI

Daimler S-class

✓ https://www.mercedes-

benz.com/en/vehicles/passenger-cars/s-class/s-

class/?shortener=true&csref=sm_ytb_w223_pc

✓ Press Release

✓ https://www.youtube.com/watch?v=-

4zsY28t76k&ab_channel=carwow

Case study

Image: © daimler.com

https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=47448319&ls=L2VuL2luc3RhbmNlL2tvLnhodG1sP29pZD05MjY2OTI0JnJlbElkPTYwODI5JmZyb21PaWQ9OTI2NjkyNCZib3JkZXJzPXRydWUmcmVzdWx0SW5mb1R5cGVJZD00MDYyNiZ2aWV3VHlwZT1saXN0JnNvcnREZWZpbml0aW9uPVBVQkxJU0hFRF9BVC0yJnRodW1iU2NhbGVJbmRleD0wJnJvd0NvdW50c0luZGV4PTUmZnJvbUluZm9UeXBlSWQ9NDA2Mjg!&rs=0https://media.daimler.com/marsMediaSite/en/instance/ko.xhtml?oid=47448319&ls=L2VuL2luc3RhbmNlL2tvLnhodG1sP29pZD05MjY2OTI0JnJlbElkPTYwODI5JmZyb21PaWQ9OTI2NjkyNCZib3JkZXJzPXRydWUmcmVzdWx0SW5mb1R5cGVJZD00MDYyNiZ2aWV3VHlwZT1saXN0JnNvcnREZWZpbml0aW9uPVBVQkxJU0hFRF9BVC0yJnRodW1iU2NhbGVJbmRleD0wJnJvd0NvdW50c0luZGV4PTUmZnJvbUluZm9UeXBlSWQ9NDA2Mjg!&rs=0https://www.youtube.com/watch?v=-4zsY28t76k&ab_channel=carwow



14 October 2020

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Q & A



14 October 2020

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End of theory. Start of practice.

Hear you next time!

architecture of telematics systemsconti/presentations_2020/c03... · 2020. 10. 15. · confidential...

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