Smart Systems

JOYNEXT: The black box for autonomous driving at a new technical level

February 29, 2024. JOYNEXT is developing a black box, the DSSAD (Data Storage System for Automated Driving). The automotive electronics specialist’s driving data storage system enables the continuous recording of complex and extensive vehicle data structures such as CAN, GNSS and a variety of sensor data such as camera, V2X, LiDAR and radar data. There will be both a hardware and a software-only solution on the market. This solution approach offers the possibility of flexibly meeting customer wishes and standard-compliant requirements.

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The DSSAD is a storage system that anonymously records vehicle-specific data during the period of active highly automated driving (from level 3, the vehicle takes over driving control, human intervention is not required under certain conditions). This includes classic data such as vehicle system statuses, driving dynamics data as well as pre-processed environmental data recorded by sensors. The purpose of the storage system is to clearly determine driving responsibilities and driving conditions in order to process and improve potential faults.

The Europe-wide DSSAD regulation is currently being developed by the UNECE – however, the introduction of the regulation has not yet been scheduled. In China, on the other hand, this DSSAD regulation has already been finalized and is scheduled to come into force from July 2024, with the full expansion stage from July 2026. JOYNEXT benefits from its global presence in the European and Chinese markets for this technology and will develop market-specific products in accordance with the regulations and timeframes and introduce its solutions in line with the regulation in China in 2024.

In addition, JOYNEXT offers seamless provision of scenario data natively in the DSSAD or via the JOYNEXT cloud service. This enables the creation of virtual scenarios from the recorded data of automated vehicles. “The reuse of recorded data has always been an elementary component of software development in the field of highly automated driving. In combination with virtual simulation, the algorithms can be prepared, trained, tested and checked for as many scenarios as possible. The JOYNEXT solution offers car manufacturers an important tool for the further development of safe, highly automated driving functions based on real data,” says Noby Mathew, Director Products & Strategy at JOYNEXT Europe. This enables vehicle manufacturers to train driving models and learn from real traffic events. The so-called “scenario generation” is JOYNEXT’s most technologically sophisticated DSSAD solution. It uses various data sources, such as CAN, GNSS and other vehicle sensor data, to map the vehicle’s own movement as well as the movement of its surroundings and other road users. This virtual representation of the driving situation based on vehicle data enables the vehicle manufacturer to read out the data quickly and easily, which can also be used as input for highly automated and autonomous driving models.   

JOYNEXT’s DSSAD uses the HDF5 (Hierarchical Data Format) format, which is recognized across the industry, for efficient data storage. This allows the high demands placed on an optimized storage system to be met in real time while the highly automated vehicles are in use. “Our DSSAD illustrates the future of data recording for highly automated driving,” explains Noby Mathew. “Within the large Asian market, we have gained a lot of experience in the field of data recording and automated driving in recent years. Our customers benefit from this experience and can use different product variants of our DSSAD black box in accordance with the country-specific regulations for highly automated vehicles from level 3,” continues Mathew.


Intelligent solutions for connected vehicles – that’s JOYNEXT. We are working on future technologies that are becoming increasingly important for car manufacturers and their customers. On the road to autonomous driving, data communication between the vehicle and mobile devices such as smartphones, other vehicles (V2V) or infrastructure systems (V2I) is becoming increasingly important. JOYNEXT is also involved in the new and further development of cloud-based services. JOYNEXT always strives to strike a balance between innovation and sustainability. When developing our products, we focus on the end user and their needs and usage behavior.

With more than 1,500 employees worldwide, JOYNEXT takes connected car technologies to a new level. We are present at seven locations; our development and innovation centers are located in Dresden (Germany) and Ningbo (China).

JOYNEXT is a direct supplier (Tier 1) to the automotive industry and has been a development partner and system supplier to renowned car manufacturers for over 20 years. Our technologies in the areas of connected infotainment and smart connectivity gateways can be found in millions of vehicles worldwide.  

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