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

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... Full description

Main Author: Ashjaei, Mohammad
Contributors: Patti, Gaetano
Behnam, Moris
Nolte, Thomas
Alderisi, Giuliana
Lo Bello, Lucia
Contained in: Real-time systems : the international journal of time-critical computing systems Dordrecht [u.a.] : Springer Science + Business Media B.V Vol. 53, No. 4 (2017), p. 526-577
Journal Title: Real-time systems : the international journal of time-critical computing systems
Fulltext access: Fulltext access (direct link - free access) 10.1007/s11241-017-9268-5
Availability is being checked...
Links: Volltext (dx.doi.org)
ISSN: 1573-1383
Keywords: Bandwidth reservation
Ethernet AVB
OriginalPaper
Over-reservation
Response time analysis
Schedulability analysis
Scheduled traffic
DOI: 10.1007/s11241-017-9268-5
Language: English
Notes: Open Access
Physical Description: Online-Ressource
ID (e.g. DOI, URN): 10.1007/s11241-017-9268-5
s11241-017-9268-5
PPN (Catalogue-ID): SPR058955844
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520 |a 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. The comparison between the results of the analysis and the simulation ones shows the effectiveness of the analysis proposed in this work. 
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