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Pre-shaping Bursty Transmissions under IEEE802.1Q as a Simple and Efficient QoS Mechanism
Navet, Nicolas; Migge, Jörn; Villanueva, Josetxo et al.
2018In Proc. WCX World Congress Experience
Peer reviewed


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Keywords :
Time Sensitive Networking; TSN; IEEE802.1Q; in-vehicle networks; Credit-based Shaper; IEEE802.1Qav; traffic shaping; Quality of Service
Abstract :
[en] The automotive industry is swiftly moving towards Ethernet as the high-speed communication network for in-vehicle communication. There is nonetheless a need for protocols that go beyond what standard Ethernet has to offer in order to provide additional QoS to demanding applications such as ADAS systems or audio/video streaming. The main protocols currently considered for that purpose are IEEE802.1Q, AVB with the Credit Based Shaper mechanism (IEEE802.1Qav) and TSN with its Time-Aware Shaper (IEEE802.1Qbv). AVB/CBS and TSN/TAS both provide efficient QoS mechanisms and they can be used in a combined manner, which offers many possibilities to the designer. Their use however requires dedicated hardware and software components, and clock synchronization in the case of TAS. Previous studies have also shown that the efficiency of these protocols depends much on the application at hand and the value of the configuration parameters. In this work, we explore the use of “pre-shaping” strategies under IEEE802.1Q for bursty traffic such as audio/video streams as a simple and efficient alternative to AVB/CBS and TSN/TAS. Pre-shaping means inserting on the sender side “well-chosen” pauses between successive frames of a transmission burst (e.g., as it happens when sending a camera frame), all the other characteristics of the traffic remaining unchanged. We show on an automotive case-study how the use of pre-shaping for audio/video streams leads to a drastic reduction of the communication latencies for the best-effort streams while enabling to meet the timing constraints for the rest of the traffic. We then discuss the limitations of the pre-shaping mechanism and future works needed to facilitate its adoption.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Navet, Nicolas ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC)
Migge, Jörn;  RealTime-at-Work (RTaW)
Villanueva, Josetxo;  Renault Group
Boyer, Marc;  Onera > DTIM
External co-authors :
Language :
Title :
Pre-shaping Bursty Transmissions under IEEE802.1Q as a Simple and Efficient QoS Mechanism
Publication date :
April 2018
Event name :
WCX World Congress Experience
Event organizer :
Event place :
Detroit, United States
Event date :
from 10-04-2018 to 12-04-2018
Audience :
Main work title :
Proc. WCX World Congress Experience
Publisher :
Collection name :
SAE Technical Paper 2018-01-0756
Peer reviewed :
Peer reviewed
Focus Area :
Security, Reliability and Trust


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