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Sensors 2018, 18(11), 3849;

Improving Worst-Case Delay Analysis for Traffic of Additional Stream Reservation Class in Ethernet-AVB Network

School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
Author to whom correspondence should be addressed.
Received: 19 September 2018 / Revised: 1 November 2018 / Accepted: 6 November 2018 / Published: 9 November 2018
(This article belongs to the Section Sensor Networks)
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With the increase in the number of Electronic Control Units (ECUs) and future requirements for vehicle functions, two SR (Stream Reservation) traffic classes may not be sufficient to ensure fulfilment of constraints for multiple traffic types with individual timing requirements transmitted in the Ethernet-AVB (Audio Video Bridging) networks. The goal of this paper is to determine the worst-case delay for an additional SR traffic class under the CBS (Credit-Based Shaper) algorithm. Delay evaluation is based on the impact analysis of CBS on different priority flows, particularly depending on when the credits of both SR class A and B drain from the worst-case perspective. More specifically, both the impact of CBS and the evolution trends of credit on different priority class flows are first analyzed from the worst-case perspective. Then, for an additional SR class, two types of worst-case delay models are established with the CBS configuration suggestions. Finally, an approach to calculate the worst-case queuing delay is proposed. Moreover, the worst-case end-to-end delay is determined by the network calculus approach and simulation. Numerical results show that the delay bounds of our models are tighter than those of other models, which is beneficial to the development of Ethernet-AVB for in-vehicle networking. View Full-Text
Keywords: automotive; credit-based shaper; deterministic delay analysis; Ethernet-AVB automotive; credit-based shaper; deterministic delay analysis; Ethernet-AVB

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Zhao, L.; He, F.; Li, E.; Xiong, H. Improving Worst-Case Delay Analysis for Traffic of Additional Stream Reservation Class in Ethernet-AVB Network. Sensors 2018, 18, 3849.

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