The connected car could be the biggest seller of the century and the dream is already being sold by the biggest of the companies in the world. The cars have been built, the testing is on and it is a known fact that Ethernet will play a critical role in automotive communications.
There will be a paradigm shift in automotive networking and it is a proven fact that in-vehicle-infotainment Ethernet AVB provides higher bandwidth and more stable network management capabilities compared to Media Oriented System Transport (MOST) and Controller Area Network (CAN) standards. With a time-synchronized network for audio, video and control data on a single cable, it delivers a highly reliable, low latency and low cost in-vehicle network with guaranteed quality of service (QoS).It is known that, “the Ethernet technology will allow for multiple in-vehicle systems (such as, multimedia/infotainment, camera-based advanced driver assistance and on-board diagnostics) to simultaneously access information over a single unshielded twisted pair cable. The leading technology for automotive applications is the IEEE Audio Video Bridging (AVB), which offers several advantages, such as open specification, multiple sources of electronic components, high bandwidth, the compliance with the challenging EMC/EMI automotive requirements, and significant savings on cabling costs, thickness and weight.”
Experts have stated that conventional 802.3 Ethernet are not designed for professional and automotive requirements due to the following limitations:
- Lack of precision timing mechanism
- Lack of QoS
- No mechanism to prevent network congestion
Ethernet Audio Video Bridging (AVB) overcomes these limitations by providing timing synchronization, eliminating buffer delay through the network and creating resource reservation. AVB defines a set of technical standards developed by the Institute of Electrical and Electronics Engineers (IEEE) Audio Video Bridging Task Group of the IEEE 802.1 standards committee. AVB is well positioned to be the next generation technology for automotive infotainment networks. Advantages of AVB include – Easy to manage, Built on IEEE standards, Affordable, Ethernet–based, single network for all media.
Aricent AVB Stack
Aricent’s Audio video bridging (AVB) stack provides a complete set of AVB protocols enabling transport and synchronization services to multimedia applications with associated quality of service. The stack provides end point implementation (talker and listener) and abstractions to OS and hardware.
- Talkers and Listener support
- Interoperates with commercial 3rd party AVB switch
- Stack ready for Auto market
- Coding guidelines: MISRA (Motor Industry Software Reliability Association) 2012
- ISO26262: In short term roadmap
- Easy API for creating audio/video end points applications
- Hardware layer abstraction for easy porting and integration
- Multiple talkers and listeners (at a time) can run on AVB stack
- Supports hardware time-stamping and Traffic shaper
- Can be configured as Grandmaster or slave. Supports BMCA (Best Master Clock Algorithm) implementation
Aricent’s Automotive solutions delivers Unique In-car User Experience by leveraging its strong pedigree in Communication, Multimedia, Embedded domains and by partnering with leading automotive forums and platform providers. Also a state-of-the-art lab set-up with all necessary infrastructure (3rd party end points and switch) to validate AVB solutions.
Aricent is present this week at the AVnu Alliance Plug Fest event at the University of Hampshire Interoperability Lab (UNH-IOL) , held in Durham, New Hampshire, USA.The AVnu Plug Fest is an event towards multi-vendor interoperability and conformance testing between different products that serve as AVB Talkers, Listeners and Switch.As a member of the AVnu Alliance, Aricent supports the AVnu forum and University of Hampshire Labs for development of specifications and tools related to Ethernet AVB standards.