MOST Network and System MOST and AVB: Two Candidates for Infotainment Networks

Perfect for latest and future infotainment networks: MOST and Ethernet AVB.
Perfect for latest and future infotainment networks: MOST and Ethernet AVB.

MOST150 is the prevalent networking technology for the coming years in automotive infotainment. Although MOST150 is only at the beginning of mass deployment, pre-development of the next generation has already started. With IEEE 802.1 AVB, another concept has entered the discussion about the successor to MOST150. AVB needs to be considered, appropriately evaluated and compared with current and evolving MOST concepts.

The MOST technology framework is the dominant technology in automotive telematics and infotainment networks, and has been smoothly brought to the road in its third generation with integrating MOST150 in 2012. The MOST Cooperation has proven to be an excellent body, permitting very direct specification and implementation processes for the benefit of both OEMs and suppliers. The close and open cooperation of OEMs and suppliers is the key factor of this success story. MOST150 systems will continue to boom in car models as the dominant infotainment network system until at least 2020.

A succeeding next generation network system for the time after MOST150 needs to meet high expectations, considering the significant increases in bandwidth demands driven by camera, display link and consumer electronics (CE) device based use cases. Flexible topology options and the seamless interconnection of previously separated car domains are further key topics. Aside from that, general requirements apply, such as cost, scalability, future-proof design, efficient supply chains, automotive maturity, ecosystem tools and IT security.

With IEEE 802.1 Audio/Video Bridging standards [1–5], packet-based synchronised streaming has become a competitive alternative in media streaming applications. Ethernet network interfaces supporting AVB have just been launched in consumer products [6] and AVB will conceivably become a common feature in CE devices which commonly use IEEE 802.3 Ethernet and IEEE 802.11 Wi-Fi technologies.

Here, another trend has to be taken into account, as Ethernet is also being evaluated in the automotive industry as a future technology option in automotive domains adjacent to the telematics domain.

Due to these facts and driven by new use cases, cross-domain interoperability is rapidly gaining importance and the applicability of AVB concepts and their interoperability with MOST need to be evaluated.