# Standards for Software-Defined Vehicles and E/E Architectures

Standards play a crucial role in shaping the development and interoperability of **Software-Defined Vehicles (SDVs)** and **E/E architectures**. In this chapter, we explore three key standards: **AUTOSAR**, **COVESA**, and **SOAFEE**, which have become foundational in modern automotive engineering. In addition, we will be looking at Eclipse SDV as an open source alliance, building on open standards.

## **AUTOSAR: A De Facto Industry Standard**

The **AUTOSAR (Automotive Open System Architecture)** standard is a widely adopted architecture that has been implemented by numerous OEMs and suppliers across millions of vehicles. Developed by the **AUTOSAR partnership**, an alliance of OEMs, Tier 1 suppliers, and other industry players, it aims to decouple hardware and software through a standardized layer.

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This architecture supports key functionalities such as **adaptive cruise control** and **lane departure warnings**, typically in applications with high **ASIL ratings**. It also provides standardization for communication, diagnostics, and integration with vehicle networks.

* **Advantages**:
  * Strong standardization and interoperability.
  * Scalability for diverse systems integration.
  * Proven safety and reliability for critical applications.
* **Challenges**:
  * High complexity and a steep learning curve.
  * Limited flexibility for rapid innovation.
  * Potentially higher development costs.

Despite its limitations, AUTOSAR remains a cornerstone in ensuring reliable and scalable automotive systems.

{% embed url="<https://medium.com/volvo-cars-engineering/the-reality-of-autosar-and-the-way-forward-36af39ec4099>" %}

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## **COVESA: Vehicle Signal Specification (VSS)**

**COVESA (Connected Vehicle Systems Alliance)**, formerly known as GENIVI, is an open alliance that promotes interoperability in **connected vehicle solutions**. A key contribution from COVESA is the **Vehicle Signal Specification (VSS)**, a standard for structuring and accessing vehicle data.

<figure><img src="https://392531723-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRqBHYU6DD895ydQm5PcS%2Fuploads%2FctjGO7eWBEVRF8umw8hl%2Fimage.png?alt=media&#x26;token=07fa2546-33b2-4ab8-bdd1-4bde8c25d232" alt=""><figcaption></figcaption></figure>

COVESA VSS provides a **tree-structured data model** that organizes vehicle domains and their associated sensors and actuators. This standard essentially realizes the **signal-to-service transformation** discussed earlier in **Service-Oriented Architectures (SOA)**.

* **Key Features**:
  * Standardized vehicle signal definitions.
  * Simplified data access for applications.
  * Strong alignment with modern SOA principles.

The adoption of COVESA VSS ensures seamless data handling and accelerates development for connected and software-defined vehicles.

## **SOAFEE: Scalable Open Architecture for Embedded Edge**

The **SOAFEE (Scalable Open Architecture for Embedded Edge)** standard, spearheaded by **ARM** and supported by a wide range of OEMs, Tier 1s, hyperscalers, and other industry players, introduces **cloud-native principles** to the automotive industry.

<figure><img src="https://392531723-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FRqBHYU6DD895ydQm5PcS%2Fuploads%2F0aNdqcMT9WD5zYWPyop7%2Fimage.png?alt=media&#x26;token=dbdb03d2-5b0a-4de5-b6e1-7b27145731b4" alt=""><figcaption></figcaption></figure>

SOAFEE integrates both **on-board** and **off-board** environments to handle mixed-criticality services efficiently.

* **On-Board Architecture**:
  * Differentiates between **high-compute CPUs** for performance and **high-safety CPUs** for critical functions.
  * Provides separate **QM** and **ASIL** environments.
  * Features a **hardware abstraction layer (HAL)** to support both high and low-safety services.
* **Off-Board Architecture**:
  * Executes cloud-based microservices in a mixed-criticality environment.
  * Ensures seamless interaction with on-board systems via orchestrators.

SOAFEE's **mixed-criticality orchestrators** and modular design enable greater flexibility and efficiency in managing SDV services. It bridges the gap between automotive-grade safety requirements and the agility of cloud-native architectures.

## Eclipse SDV: Driving Open-Source Innovation

The **Eclipse SDV Working Group**, hosted by the **Eclipse Foundation**, plays a pivotal role in advancing open-source development for **Software-Defined Vehicles (SDVs)**. Its mission is to create an open-source platform supporting tools, frameworks, and runtime environments that align with modern industry standards such as **AUTOSAR**, **COVESA**, and **SOAFEE**.

Key contributions from Eclipse SDV include **reference implementations**, **open development models**, and the promotion of **standardized APIs**. This enables faster, collaborative development and ensures interoperability between different SDV components. By embracing an open-source approach, Eclipse SDV accelerates the deployment of cutting-edge automotive technologies while fostering a global developer community focused on the future of mobility.

## Summary: Standards and Alliances Shaping SDVs

Together, **AUTOSAR**, **COVESA**, **SOAFEE**, and **Eclipse SDV** address the evolving demands of **Software-Defined Vehicles**, balancing **safety**, **scalability**, and **innovation**. These standards empower OEMs and suppliers to build **interoperable** and **future-ready** vehicle platforms by standardizing hardware-software integration and promoting cloud-native, service-oriented architectures.

Complementing these technical standards, the **SDV Alliance** serves as a global initiative fostering industry collaboration. By uniting automotive manufacturers, technology companies, and software developers, the alliance defines **best practices** and **standards** for SDV ecosystems, ensuring a cohesive and innovative approach across the automotive industry.

Together, these standards and alliances create a solid foundation for the automotive industry’s **software-driven transformation**, supporting cutting-edge technologies while ensuring **functional safety**, **data-driven intelligence**, and **service-oriented designs** that define the future of mobility.


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