MOST in future automotive connectivity

June 28, 2013 //By Rainer Klos, MOST Cooperation
MOST in future automotive connectivity
The third generation of MOST, the networking standard for automotive entertainment and information, was recently introduced to the market with MOST150. The questions that arise now are: What’s next? Where is the network heading? How will the future requirements for in-car data networks define which functions are needed? How flexible should such a communication network be? This article answers these questions.

To easily and seamlessly integrate upcoming applications requires a flexible and upgradable network that forms a stable, robust backbone. For example, there is more and more focus on a growing number of IP-based applications. The requirements for bandwidth are driven by applications such as fast software updates of the different control devices, fast media access to onboard mass storage systems (HDD/SSD), mobile with USB connected consumer electronics devices and WLAN or LTE connected car-to-x applications.

For driver assistance camera systems, the uncompressed transfer of video data is required, which additionally presumes high transfer rates. It is important that common data formats are supported. Furthermore, the network concept should be inherently scalable and extendable with respect to speed; the amount and characteristics of the data channels and application-specific interfaces should be chosen appropriately.


In-car applications are in transition. The scope of infotainment is continuously extended and optimized – take, for example, rear seat entertainment in HD quality with Blu-ray. The challenge is to keep pace with the developments of the consumer industry and the requirements of the users: the diversity of entertainment applications is multiplying rapidly, and users today cultivate a digital lifestyle where they always carry their entertainment systems everywhere. It is necessary, therefore, to connect these external systems and services with the car network. The focus is on the efficient and innovative migration of the features of entertainment electronics like internet radio and video and online connection via WiFi, UMTS and LTE.

Data Streaming

The car industry has focused for more than ten years on the MOST standard for audio and video communication. From the start, the network was conceived for the streaming of data to different devices, to ease the load on entertainment systems in cars. For communication between the outside world and the car, internet protocol (IP) is gaining increasing importance, where data streams in the IT world use different IP packet based protocols. The MOST

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