Tomorrow's In-Car Interconnect? A Competitive Evaluation of IEEE 802.1 AVB and Time-Triggered Ethernet (AS6802)

Steinbach, Till; Lim, Hyung-Taek; Korf, Franz; Schmidt, Thomas C.; Herrscher, Daniel; Wolisz, Adam

doi:10.1109/vtcfall.2012.6398932

Cited by 59 publications

(33 citation statements)

References 10 publications

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“…But RC and BE traffics are more of event triggered type. RC traffic (similar to ARINC 664, Part 7) has a guaranteed maximum latency under certain bandwidth, which allows the data to be routed by a switch within a limited time, though messages may be queued at buffer [31]. On the contrast, BE data have no QoS at all and can only access the network through CSMA/CD mechanism.…”

Section: B Ethernet Transmission Capabilitymentioning

confidence: 99%

“…However, if just considering automotive Ethernet at the 100Mbit/s scenario, both AVB and TTEthernet have been proved competitive in multiple cases [31], [44]. Nowadays, both protocols are deemed as very promising contenders for the future in-vehicle network Ethernet standard, although some are more favor for AVB than TTEthernet [24], [45].…”

Section: B Automotive Ethernet Fault Detection Capabilitymentioning

confidence: 99%

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A qualitative comparison of FlexRay and Ethernet in vehicle networks

Zeng

Khalid

Chowdhury

2015

2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE)

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This paper presents a qualitative study of FlexRay and Ethernet in in-vehicle communication networks. Although both protocols have experienced fast growth in the past years, they still have some important deficiencies that deserve attention. This qualitative study has not only outlined the important shortcomings of in-vehicle FlexRay and Ethernet, but also identified their unique competitive edges, respectively. Intensive analyses of both protocols are carried out from three key perspectives: system cost, data transmission capacity and fault detection capability. Some improving approaches have also been pointed out. It is revealed that at the current stage FlexRay is better than Ethernet in transmitting time critical signals deterministically, but has higher cost and complexity. Ethernet, though less deterministic than FlexRay, possesses much greater bandwidth and can transmit data at quite small latency and jitter. This qualitative study has indicated that both protocols need further improvement to meet the requirements of future in-vehicle networks, yet Ethernet may lead the development and expand faster. I. INTRODUCTIONEncoded communication channels have long been used to transmit signals among different controllers in in-vehicle networks. The typical motivations for this fact are: 1) To reduce cable cost. Since wire harness subsystem is the third most expensive and heaviest subsystem after engine and chassis [1], adopting coded communication is obviously a wise strategy to follow. 2) To save package space. As vehicles are built smaller in size but more enriched in functions, routing of wire harness has become increasingly challenging. 3) To cater the demands for higher bandwidth. Nowadays some luxury cars, even not fully featured, already have more than 70 ECUs and 2500 signals to transmit [2], letting alone accommodating the rising demands from ADAS and infotainment systems. 4) To enhance communication safety. Digital transmission has unparalleled advantages in resisting external disturbance over traditional point-to-point analog wires. Moreover, digital signals can be encrypted to further enhance data security in transmission.After LIN (Local Interconnect Network) and CAN (Controller Area Network), FlexRay and Ethernet are two most recently developed wired in-vehicle communication networks. FlexRay was firstly public released in 2004 and has gradually become an ISO standard after 2009. FlexRay is commonly understood as the protocol for X-by-Wire applications, and can provide deterministic communication for chassis and vehicle dynamic controls. BMW is the first

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Section: B Ethernet Transmission Capabilitymentioning

confidence: 99%

Section: B Automotive Ethernet Fault Detection Capabilitymentioning

confidence: 99%

A qualitative comparison of FlexRay and Ethernet in vehicle networks

Zeng

Khalid

Chowdhury

2015

2015 IEEE 28th Canadian Conference on Electrical and Computer Engineering (CCECE)

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“…For automotive networks, the work in Lo and Tuohy et al (2015) indicate AVB as one of the possible candidates for real-time communication domain. Moreover, the AVB suitability for supporting traffic flows of both Advanced Driver Assistance Systems (ADAS) and multimedia/infotainment systems was proven in Steinbach et al (2012), . In Lim and Volker (2011) the capability of AVB to be used as an in-car backbone network for inter domain communication is discussed.…”

Section: Avb Related Researchmentioning

confidence: 99%

Schedulability analysis of Ethernet Audio Video Bridging networks with scheduled traffic support

et al. 2017

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The IEEE Audio Video Bridging (AVB) technology is nowadays under consideration in several automation domains, such as, automotive, avionics, and industrial communications. AVB offers several benefits, such as open specifications, the existence of multiple providers of electronic components, and the real-time support, as AVB provides bounded latency to real-time traffic classes. In addition to the above mentioned properties, in the automotive domain, comparing with the existing in-vehicle networks, AVB offers significant advantages in terms of high bandwidth, significant reduction of cabling costs, thickness and weight, while meeting the challenging EMC/EMI requirements. Recently, an improvement of the AVB protocol, called the AVB ST, was proposed in the literature, which allows for supporting scheduled traffic, i.e., a class of time-sensitive traffic that requires time-driven transmission and low latency. In this paper, we present a schedulability analysis for the real-time traffic crossing through the AVB ST network. In addition, we formally prove that, if the bandwidth in the network is allocated according to the AVB standard, the schedulability test based on response time analysis will fail for most cases even if, in reality, these cases are schedulable. In order to provide guarantees based on analysis test a bandwidth over-reservation is required. In this paper, we propose a solution to obtain a minimized bandwidth over-reservation. To the best of our knowledge, this is the first attempt to formally spot the limitation and to propose a solution for overcoming it. The proposed analysis is applied to both the AVB standard and the AVB ST. The analysis results are compared with the results of several simulative assessments, obtained using OMNeT++, on both automotive and industrial case studies. Real-Time Syst (2017) 53:526-577 527 between the results of the analysis and the simulation ones shows the effectiveness of the analysis proposed in this work.

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“…RC messages are transmitted if there are no TT messages, and BE traffic has the lowest priority. TTEthernet is suitable for automotive [16], avionics [19] and space [6] applications.…”

mentioning

confidence: 99%

Timing Analysis of Rate Constrained Traffic for the TTEthernet Communication Protocol

Tămaş-Selicean¹,

Pop²,

Steiner

2015

2015 IEEE 18th International Symposium on Real-Time Distributed Computing

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Abstract-Ethernet is a low-cost communication solution offering high transmission speeds. Although its applications extend beyond computer networking, Ethernet is not suitable for realtime and safety-critical systems. To alleviate this, several real-time Ethernet-based communication protocols have been proposed, such as TTEthernet, which is the focus of this paper. TTEthernet is suitable for mixed-criticality systems both in the safety and temporal domain. TTEthernet offers three traffic classes: static timetriggered (TT) traffic, dynamic traffic with bounded transmission rate (called "Rate Constrained", RC), and unbounded dynamic traffic (BE). In this paper we propose a novel worst-case endto-end delay analysis of the RC traffic for TTEthernet systems. The proposed technique considerably reduces the pessimism of the analysis, compared to existing approaches. We have evaluated the new analysis using several test cases.

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Tomorrow's In-Car Interconnect? A Competitive Evaluation of IEEE 802.1 AVB and Time-Triggered Ethernet (AS6802)

Cited by 59 publications

References 10 publications

A qualitative comparison of FlexRay and Ethernet in vehicle networks

A qualitative comparison of FlexRay and Ethernet in vehicle networks

Schedulability analysis of Ethernet Audio Video Bridging networks with scheduled traffic support

Timing Analysis of Rate Constrained Traffic for the TTEthernet Communication Protocol

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