Incorporating TSN/BLS in AFDX for mixed-criticality applications: Model and timing analysis

Finzi, Anaïs; Mifdaoui, Ahlem; Frances, Fabrice; Lochin, Emmanuel

doi:10.1109/wfcs.2018.8402346

Cited by 10 publications

(18 citation statements)

References 10 publications

(18 reference statements)

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“…This highlights the fact that L k R is not taken into account in an accurate way by the WbA model. This led to the second model, CCbA [6], which is based on the continuity of the credit. The results presented in [6] show the tightness of the CCbA.…”

Section: Existing 3-classes Network Calculus Modelsmentioning

confidence: 99%

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Network Calculus-based Timing Analysis of AFDX networks with Strict Priority and TSN/BLS Shapers

Finzi

Mifdaoui

Frances

et al. 2018

2018 IEEE 13th International Symposium on Industrial Embedded Systems (SIES)

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We propose a formal timing analysis of an extension of the AFDX standard, incorporating the TSN/BLS shaper, to homogenize the avionics communication architecture, and enable the interconnection of different avionics domains with mixed-criticality levels, e.g., current AFDX traffic, Flight Control and In-Flight Entertainment. Existing Network Calculus models are limited to three classes, but applications with heterogeneous traffic require additional classes. Hence, we propose to generalize an existing Network Calculus model to do a worst-case timing analysis of an architecture with multiple BLS on multi-hop networks, to infer real-time bounds. Then, we conduct the performance analysis of such a proposal. First we evaluate the model on a simple 3-classes single-hop network to assess the sensitivity and tightness of the model, and compare it to existing models (CPA and Network Calculus). Secondly, we study a realistic AFDX configuration with six classes and two BLS. Finally, we compute a real use-case to add A350 flight control traffic to the AFDX. Results show the good properties of the generalized Network Calculus model compared to the CPA model and the efficiency of the extended AFDX to noticeably enhance the medium priority level delay bounds, while respecting the higher priority level constraints, in comparison with the current AFDX standard.

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Section: Existing 3-classes Network Calculus Modelsmentioning

confidence: 99%

“…Additionally, a formal analysis based on the Network Calculus is more scalable compared to one based on CPA [17], and Network Calculus has already been used to certified the AFDX [11]. Thus, we have proposed two Network Calculus models in [7] [6]. Both these models are limited to three classes.…”

mentioning

confidence: 99%

Network Calculus-based Timing Analysis of AFDX networks with Strict Priority and TSN/BLS Shapers

Finzi

Mifdaoui

Frances

et al. 2018

2018 IEEE 13th International Symposium on Industrial Embedded Systems (SIES)

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“…For instance, the end-to-end latencies should be on the order of a few microseconds to a few milliseconds for industrial applications [1], around 1 millisecond for the Please direct correspondence to M. Reisslein tactile Internet [2], [3], and on the order of 100 microseconds for the one-way fronthaul in wireless cellular networks. For example, critical healthcare applications, e.g., for telesurgery, and transportation applications [4] require near realtime connectivity. Throughput requirements largely dependent on the application needs, which may vary widely from small amounts of IoT data to large exchanges of media data transfers to and from the cloud (or the fog to reduce latency) [5].…”

Section: Introduction a Motivationmentioning

confidence: 99%

Ultra-Low Latency (ULL) Networks: The IEEE TSN and IETF DetNet Standards and Related 5G ULL Research

Nasrallah

Thyagaturu

Alharbi

et al. 2019

IEEE Commun. Surv. Tutorials

449

219

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Many network applications, e.g., industrial control, demand Ultra-Low Latency (ULL). However, traditional packet networks can only reduce the end-to-end latencies to the order of tens of milliseconds. The IEEE 802.1 Time Sensitive Networking (TSN) standard and related research studies have sought to provide link layer support for ULL networking, while the emerging IETF Deterministic Networking (DetNet) standards seek to provide the complementary network layer ULL support. This article provides an up-to-date comprehensive survey of the IEEE TSN and IETF DetNet standards and the related research studies. The survey of these standards and research studies is organized according to the main categories of flow concept, flow synchronization, flow management, flow control, and flow integrity. ULL networking mechanisms play a critical role in the emerging fifth generation (5G) network access chain from wireless devices via access, backhaul, and core networks. We survey the studies that specifically target the support of ULL in 5G networks, with the main categories of fronthaul, backhaul, and network management. Throughout, we identify the pitfalls and limitations of the existing standards and research studies. This survey can thus serve as a basis for the development of standards enhancements and future ULL research studies that address the identified pitfalls and limitations.

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“…To cope with this emerging issue, in [3], we have assessed the most relevant existing solutions enabling mixed-criticality on the AFDX vs avionics requirements. The Burst-Limiting Shaper (BLS) [5] (defined in the Time Sensitive Networking (TSN) task group [6]) on top of Non-Preemptive Strict-Priority (NP-SP) scheduler has been selected as the most promising solution favoring the main avionics requirements.…”

Section: Introductionmentioning

confidence: 99%

“…The first results were encouraging to pursue this line through providing formal timing analysis to prove certification requirements, a key point in avionics. Afterwards, in [4], we have introduced a Network Calculus-based approach to compute the delay bounds of SCT and RC classes in such an extended AFDX network, taking into account the impact of the TSN/BLS. The performance evaluation of our proposal on a realistic AFDX configuration has highlighted its efficiency, in comparison with the current AFDX (implementing only NP-SP scheduler).…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of extended AFDX via bandwidth reservation for TSN/BLS shapers

et al. 2019

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To support mixed-criticality applications, the AFDX may integrate multiple traffic classes: Safety-Critical Traffic (SCT) with hard real-time constraints, Rate-Constrained (RC) traffic requiring bounded latencies and Best Effort (BE) traffic with no delivery constraints. These traffic classes are managed based on a Non-Preemptive Strict Priority (NP-SP) Scheduler, where the highest priority traffic (SCT) is shaped with a Burst Limiting Shaper (BLS). The latter has been defined by the Time Sensitive Networking (TSN) task group to limit the impact of high priority flows on lower priority ones. This paper proposes two bandwidth reservation methods for BLS shapers in AFDX networks. The proposed methods are evaluated on a realistic AFDX configuration. Results show their efficiency to noticeably enhance the RC delay bounds and the SCT schedulability, in comparison to an intuitive method.

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Incorporating TSN/BLS in AFDX for mixed-criticality applications: Model and timing analysis

Cited by 10 publications

References 10 publications

Network Calculus-based Timing Analysis of AFDX networks with Strict Priority and TSN/BLS Shapers

Network Calculus-based Timing Analysis of AFDX networks with Strict Priority and TSN/BLS Shapers

Ultra-Low Latency (ULL) Networks: The IEEE TSN and IETF DetNet Standards and Related 5G ULL Research

Performance enhancement of extended AFDX via bandwidth reservation for TSN/BLS shapers

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