AUTOSAR Adaptive
PREEvision Use Case

Adaptive AUTOSAR Design
with PREEvision

Get the most out of the Adaptive AUTOSAR platform.

Adaptive software based on C++, running on a Linux-based POSIX OS, high-performance computers (HPC) with multi-core processors, and a new AUTOSAR system architecture that is based on services: AUTOSAR Adaptive expands the AUTOSAR platform to meet the demands of the latest automotive trends. PREEvision helps you to get the most out of the Adaptive AUTOSAR platform and to expand your existing AUTOSAR systems and solutions with future-proof applications and HPCs.

Advantages

  • SOA as common basis for AUTOSAR Adaptive and Classic
  • Modeling of combined systems of AUTOSAR Classic and Adaptive
  • Dedicated user interface for the Adaptive design
  • UML-based class diagrams and state chart diagrams
  • Support for high-performance computers with multicore architectures and virtualization
  • Import and export of different AUTOSAR files

The Use Case

AUTOSAR Adaptive vs. AUTOSAR Classic

First of all, Adaptive AUTOSAR is an additional platform. AUTOSAR Adaptive will not replace AUTOSAR Classic. New solutions based on Adaptive AUTOSAR can be added to existing AUTOSAR Classic architectures.

And mixed architectures will be the standard scenario to benefit from the strengths of both platforms: AUTOSAR Classic is optimized for the deeply embedded hard- and software of the classic automotive domains, AUTOSAR Adaptive offers the flexibility that, for example, car-to-car or car-to-x communication demands.

AUTOSAR Adaptive supports connectivity in cars.
The Adaptive AUTOSAR platform meets the demands for connectivity in car.

Updates and Upgrades

One of the most significant differences to AUTOSAR Classic: AUTOSAR Adaptive tears down the separation between design time and execution time.

Current automotive trends like autonomous driving or car-to-x services demand the flexibility that consumers know from their PC or smartphone:

  • software updates over the air (OTA),
  • applications that can be installed to enhance the functionality of the system, and
  • applications that communicate with services outside the vehicle.

The AUTOSAR Adaptive platform allows the integration of new applications at any time.

C++ and POSIX

C++ is the language for AUTOSAR Adaptive Applications instead of C that is used in AUTOSAR Classic. C++ is optimized for performance critical and complex applications.

Adaptive applications are executed within processes that are managed by the operating system, which is a linux-based POSIX system. If permitted by the configuration of the POSIX OS, processes can be added to or removed from the list of executables at any time.

High-Performance Computing

While AUTOSAR Classic serves deeply embedded ECUs, Adaptive AUTOSAR is optimized for high-performance computing.

The ECU of AUTOSAR Classic is now called machine, supports multicore processors and may even be a virtual machine using shared hardware.

The communication technology for Adaptive AUTOSAR is Ethernet exclusively, offering more bandwidth than legacy technologies like CAN. In short: Adaptive AUTOSAR is optimized to utilize both increasing processing power and faster communication.

Adaptive AUTOSAR design with PREEvision

PREEvision provides multiple diagrams and a dedicated user interface to carry out all design steps needed for a system design based on AUTOSAR Adaptive.

Design Workflow for AUTOSAR Adaptive in PREEvision
The design workflow for AUTOSAR Adaptive: from Adaptive Service and Software Design, to Network Topology and Machine Design and Ethernet Communication Design.

VIDEO HIGHLIGHT

AUTOSAR Adaptive

Modeling of Service-Oriented Architectures

How to develop combined adaptive-classic systems with PREEvision.

Adaptive Service and Software Design

The service interface design with class diagram
Service interfaces modeled in class diagrams.

Service Interface Definition

To enable software updates and to allow new applications to interact with existing software, Adaptive AUTOSAR is based on a service-oriented approach. Service providers and service consumers can find and subscribe to each other and communicate via well-defined service interfaces.

The definition of service interfaces with methods, properties, and events is one of the major tasks of the system design in Adaptive AUTOSAR. PREEvision offers dedicated diagrams and tables for the service definition.

SOME/IP Interface Deployment

SOME/IP is the standard transport protocol for the middleware in Adaptive AUTOSAR. To enable the middleware, for example, to recognize method calls or to send event information, the service interface and its sub-elements must be uniquely characterized with an ID. The deployment artifacts are automatically created by PREEvision based on settings of the service interface.

The SOME/IP transformer chain
For SOME/IP, the information to be sent via Ethernet can be serialized with transformer chains.

SOME/IP Transformation

The SOME/IP transformation describes how the data is encoded to be transmitted via Ethernet. In AUTOSAR Adaptive, the serialization code is generated based on the Service Interface description and default values. Additionally, fine granular modeling on the level of data types is also possible. In PREEvision, the transformation properties on both levels can be defined.

PREEvision allows the combination of AUTOSAR Classic and AUTOSAR Adaptive in one model.

Adaptive Software Design

In AUTOSAR Adaptive, the service interfaces are implemented via software components: Software components have ports which are typed by the service interfaces. This works similarly to AUTOSAR Classic.

 

Combined Modeling 

To connect AUTOSAR Adaptive and AUTOSAR classic software components, PREEvision provides a dedicated adapter than can be used in software diagrams. The port adapter allows to link the sub-elements of service interfaces of AUTOSAR Adaptive to interfaces of AUTOSAR Classic like sender receiver interfaces, client server interfaces, and trigger interfaces.

Adaptive Application

In PREEvision the Adaptive Application represents the distribution unit of application software that is deployed to the adaptive platform. Application software developers pass the results of their work as an adaptive application to the integration workflow. The adaptive application itself is a set of executables. One executable contains the software components implementing the application.

Adaptive Topology and Machine Design

Network Topology Design

PREEvision provides a network diagram to model an Ethernet network with machines and switches and to connect the Ethernet network to the existing topology via gateways.

Network Topology Design
The Network Topology Diagram supports the creation of the hardware topology.
A HPC can contain multi-core microprocessors, execution contexts or switches.

Machines

In Adaptive AUTOSAR, the adaptive software is executed on machines with microprocessors that can contain multiple cores. The process-to-machine mapping maps software components to cores in the microprocessor. Machines may be high-performance computers that provide the computing power needed for data-rich applications.

With PREEvision, the user designs HPCs graphically in diagrams. This includes internal busses, switches, and the virtualization of different execution contexts. Completed HPCs can then be integrated into existing networks. This architecture serves as the basis for the communication design.

Ethernet Communication Design

Service Instantiation

Service instances represent the service interfaces on the communication layer. In PREEvision, the instances are created automatically including Ethernet clusters, VLANs, switch configurations or network endpoints. Also, the communication paths are created.

The configuration of the service instances comprises the definition of parameters for the bus communication like SOME/IP identification of the service, the transport protocol (TP) and timing information for service offer and service search. Also, the IP addresses must be defined, like IPv4 or IPv6 addresses to indicate where the server accepts the method calls and where the server sends event messages to.

Software/Hardware Mapping
In PREEvision, mappings between hardware and software can easily be created via drag and drop.

Service Discovery

Service discovery messages are exchanged between network nodes to announce and to discover available service instances. Service discovery configuration organizes the communication needed to offer services on the provider side and to search for and to subscribe to services on the consumer side.

The AUTOSAR Adaptive Explorer
The AUTOSAR Adaptive Explorer allows to easily switch between the different abstraction layers and model parts.

Modeling Adaptive with PREEvision

Though AUTOSAR does not prescribe a defined order, PREEvision offers a workflow comprising all steps needed to model a complete AUTOSAR Adaptive system.

The AUTOSAR Adaptive Explorer focuses on the model parts needed and provides all necessary tables and editors to execute for the actual step.

The explorer allows you to easily change between the different abstraction layers and model parts, starting from the service definition through software and hardware to the communication aspects.

Deployment

Integrating adaptive applications, machines or service instances into an AUTOSAR Adaptive platform is called deployment. The deployment can be configured either during design time, and it can also be configured during runtime of the AUTOSAR Adaptive platform.

These updates, upgrades or additions to an existing system are one of the main advantages of Adaptive AUTOSAR compared with the classic platform. All information needed to deploy machines or adaptive applications are collected in so-called manifests.

Export of Configuration Manifests

The configuration of the AUTOSAR Adaptive Platform is done by manifests. PREEvision allows to export all manifests defined by AUTOSAR Adaptive:

  • Service Interface Description 
    Contains one or several service interface definitions including their data types, data type mappings, computation methods and units. 

  • Execution Manifest
    Provides the information required for the actual deployment of an application on an AUTOSAR Adaptive platform. 

  • Machine Manifest 
    Contains machine-specific configurations for one deployment procedure independent of any service instances or applications, for example, machines, cores, network endpoints or mode declarations. 

  • Service Instance Manifest
    Contains the service instances, the service discovery settings, the mapping of the service instances to the machine and optionally the mapping of service instances to the software component ports. This format is used at deployment time.
  • Adaptive Application Description 
    This PREEvision-specific format contains all contents of the manifests defined by AUTOSAR in one file. 

   

Format Use Case AUTOSAR Version
Service Interface Description
 
 
 
 
Import/Export
 
 
 
 
           
              19-03
Execution Manifest*
Machine Manifest*
Service Instance Manifest*
Application Description
Custom Export

*Preliminary manifests

You can also import existing data into your AUTOSAR Adaptive model in PREEvision.

AUTOSAR Adaptive Toolchain

PREEvision is part of the Adaptive AUTOSAR tool chain. While PREEvision supports the Adaptive system and application design including deployments, CANoe can be used for simulation and tests. With the DaVinci Adaptive Tool Suite, you can develop the actual adaptive application.

AUTOSAR Adaptive Toolchain
PREEvision as a part of the Vector AUTOSAR tool chain works with CANoe and the DaVinci Adaptive Tool Suite.

Know-How

PREEvision|AUTOSAR Adaptive
2019-12-03 Webinar Recordings
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PREEvision Brochure

An introduction to Vectors E/E engineering solution and its comprehensive functions.

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ARTICLE HIGHLIGHT

Bridging the Gap Between AUTOSAR Classic and Adaptive Systems

Service-oriented software architectures

AUTOSAR Adaptive can be introduced successfully if the hardware and software that is based on AUTOSAR Adaptive works well with the existing AUTOSAR Classic system components. Full implementation throughout the system – including when implementation takes place on different platforms – will be one of the next major challenges in E/E development. Service-oriented architectures can bridge the gap between two worlds.

Translation of a German-language publication "Elektronik automotive", issue 11/2019

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Lecture by Marcelino Varas, Vector, at the 4th Vector Automotive Ethernet Symposium on April 2nd, 2019 in Stuttgart, Germany

VIDEO HIGHLIGHT

Service-Oriented Architecture and Ethernet Design

Automotive Ethernet is changing the paradigm for designing communication architectures: Instead of a signal-oriented communication, ECUs offer services via a defined protocol to all other participants in the network.

The lecture illustrates what is meant by the term "service", what distinguishes service-oriented architectures and what consequences they have for the development of distributed systems. Design workflows for Ethernet communication in AUTOSAR Classic and AUTOSAR Adaptive are presented and explained using Vector's model-based E/E development environment PREEvision as an example.

Playing time 26:00 minutes, published 5/2019

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PREEvision|AUTOSAR System and Software Design

Incorporate AUTOSAR concepts in software and hardware architectures.

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PREEvision|AUTOSAR Communication Design

AUTOSAR compliant communication design of all data elements transferred over the bus.

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PREEvision|Automotive Ethernet Design and SOA

AUTOSAR compliant design of Automotive Ethernet networks and clusters.

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AUTOSAR Adaptive

A future-proof standard for automotive ECUs based on POSIX operating systems.

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