Timing Analysis of Rate Constrained Traffic for the TTEthernet Communication Protocol

Tămaş-Selicean, Domiţian; Pop, Paul; Steiner, Wilfried

doi:10.1109/isorc.2015.32

Cited by 23 publications

(17 citation statements)

References 14 publications

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“…Their methods are able to handle up to 100,000 TT frames, but ignore RC frames. A lot of work has been done for the analysis and optimization of communication protocols, including TTEthernet [15,14]. Researchers, for example, have proposed approaches to decide the routes for the frames, their packing and fragmenting and the schedule tables for the TT frames [14].…”

Section: Related Workmentioning

confidence: 99%

“…Recently, researchers have proposed a WCD analysis [15] for RC frames in TTEthernet, taking into account TT frames. In this paper, we have extended this analysis to determine the WCD of a RC frame.…”

Section: Wcd Analysismentioning

confidence: 99%

“…In this paper, we have extended this analysis to determine the WCD of a RC frame. Compared to the work in [15], we have to account for the possible fragmenting of a RC frame, decided by the VL parameters. Thus, a RC message m i will be split into k =…”

Section: Wcd Analysismentioning

confidence: 99%

“…Let R m i be the WCD determined by the analysis in [15] for the last frame f i,k of m i . Then, the WCD of m i is WCD(m i ) = vl i .BAG · (k − 1) + R m i , where vl i .BAG is the period of the frames of message m i .…”

Section: Wcd Analysismentioning

confidence: 99%

“…RC frames may be delayed by other RC frames or by TT frames. However, analysis methods exist that bound their worst-case end-to-end delays [15], providing timing guarantees. BE frames are compliant with IEEE 802.3 Ethernet and have the lowest priority, without any timing guarantees.…”

Section: Introductionmentioning

confidence: 99%

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Traffic class assignment for mixed-criticality frames in TTEthernet

Gavriluţ

Pop

2016

SIGBED Rev.

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In this paper we are interested in mixed-criticality applications, which have functions with different timing requirements, i.e., hard real-time (HRT), soft real-time (SRT) and functions that are not time-critical (NC). The applications are implemented on distributed architectures that use the TTEthernet protocol for communication. TTEthernet supports three traffic classes: Time-Triggered (TT), where frames are transmitted based on static schedule tables; Rate Constrained (RC), for dynamic frames with a guaranteed bandwidth and bounded delays; and Best Effort (BE), for which no timing guarantees are provided. HRT messages have deadlines, whereas for SRT messages we capture the quality-of-service using "utility functions". Given the network topology, the set of application messages and their routing, we are interested to determine the traffic class of each message, such that all HRT messages are schedulable and the total utility for SRT messages is maximized. For the TT frames we decide their schedule tables, and for the RC frames we decide their bandwidth allocation. We propose a Tabu Search-based metaheuristic to solve this optimization problem. The proposed approach has been evaluated using several benchmarks, including two realistic test cases.

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Section: Related Workmentioning

confidence: 99%

Section: Wcd Analysismentioning

confidence: 99%

Section: Wcd Analysismentioning

confidence: 99%

Section: Wcd Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Traffic class assignment for mixed-criticality frames in TTEthernet

Gavriluţ

Pop

2016

SIGBED Rev.

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Schedulability analysis and efficient scheduling of rate constrained messages in the TTEthernet protocol

Kermia

2017

Softw Pract Exp

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Over time, cyber-physical systems are becoming mixed criticality systems. As the complexity and the size of these systems grow, computation/communication resources should be more efficient than with traditional systems. TTEthernet is a communication infrastructure that enables the use of a single physical communication infrastructure for distributed mixed criticality applications while providing timely determinism. TTEthernet distinguishes between two traffic categories: the standard event triggered and the time triggered. The latter, for which higher priority is granted, is subject to strong timing guarantees because of strict periodicity constraint that fixes start-time cycles of time-triggered messages. In addition, event-triggered traffic includes rate-constrained messages that are of lower priority and have a minimum time interval between their transmission. The paper proposes both an on-line efficient scheduling algorithm and a necessary and sufficient schedulability condition based on the worst case response time computation for rate-constrained messages while taking into account time-triggered messages transmission.

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Timing analysis of rate-constrained traffic in TTEthernet using network calculus

Zhao

Pop

et al. 2017

Real-Time Syst

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Timing Analysis of Rate Constrained Traffic for the TTEthernet Communication Protocol

Cited by 23 publications

References 14 publications

Traffic class assignment for mixed-criticality frames in TTEthernet

Traffic class assignment for mixed-criticality frames in TTEthernet

Schedulability analysis and efficient scheduling of rate constrained messages in the TTEthernet protocol

Timing analysis of rate-constrained traffic in TTEthernet using network calculus

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