39 Search Results for "Terraneo, Federico"

Volume

OASIcs, Volume 108

Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

NG-RES 2023, January 18, 2023, Toulouse, France

Editors: Federico Terraneo and Daniele Cattaneo

Volume

OASIcs, Volume 98

Third Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2022)

NG-RES 2022, June 22, 2022, Budapest, Hungary

Editors: Marko Bertogna, Federico Terraneo, and Federico Reghenzani

Volume

OASIcs, Volume 87

Second Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2021)

NG-RES 2021, January 20, 2021, Budapest, Hungary

Editors: Marko Bertogna and Federico Terraneo

Volume

OASIcs, Volume 77

Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2020)

NG-RES 2020, January 21, 2020, Bologna, Italy

Editors: Marko Bertogna and Federico Terraneo

Artifact
Software
DOI: 10.4230/artifacts.25582
Miosix

Authors: Federico Terraneo

Abstract
Cite as

Federico Terraneo. Miosix (Software). Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2026)

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@misc{dagstuhl-artifact-25582,
   title = {{Miosix}}, 
   author = {Terraneo, Federico},
   note = {Software, swhId: \href{https://archive.softwareheritage.org/swh:1:dir:8104ca885b935dab2efb9b52c0eb0339f022d668;origin=https://github.com/fedetft/miosix-kernel;visit=swh:1:snp:81aea1b096d54584aa2c03f8f479e0e83dc88ab8;anchor=swh:1:rev:54844b8da984b2e70a1850bb487e02ac036b221f}{\texttt{swh:1:dir:8104ca885b935dab2efb9b52c0eb0339f022d668}} (visited on 2026-03-10)},
   url = {https://github.com/fedetft/miosix-kernel.git},
   doi = {10.4230/artifacts.25582},
}
Document
DOI: 10.4230/OASIcs.NG-RES.2026.4
Efficient Design of High-Resolution Timekeeping in Real-Time Operating Systems

Authors: Federico Terraneo and Daniele Cattaneo

Published in: OASIcs, Volume 140, 7th Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2026)

Abstract
High-resolution timekeeping is a desirable feature in real-time operating systems targeting microcontrollers, which traditionally has been held back due to its impact on context switch overhead. In this paper we present the design of a timing subsystem that decouples preemption from the timekeeping operation. This design, making use of 1+N hardware timers, significantly speeds up the context switch code while scaling effectively to multi-core microcontroller architectures with N cores. Preliminary experimental results on the Miosix fluid kernel show the effectiveness of the proposed design.
Cite as

Federico Terraneo and Daniele Cattaneo. Efficient Design of High-Resolution Timekeeping in Real-Time Operating Systems. In 7th Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2026). Open Access Series in Informatics (OASIcs), Volume 140, pp. 4:1-4:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2026)

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@InProceedings{terraneo_et_al:OASIcs.NG-RES.2026.4,
  author =	{Terraneo, Federico and Cattaneo, Daniele},
  title =	{{Efficient Design of High-Resolution Timekeeping in Real-Time Operating Systems}},
  booktitle =	{7th Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2026)},
  pages =	{4:1--4:15},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-415-4},
  ISSN =	{2190-6807},
  year =	{2026},
  volume =	{140},
  editor =	{Ali, Hazem Ismail and Kurunathan, Harrison},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2026.4},
  URN =		{urn:nbn:de:0030-drops-254228},
  doi =		{10.4230/OASIcs.NG-RES.2026.4},
  annote =	{Keywords: RTOS, Task Scheduling, Multiprocessing}
}
Document
DOI: 10.4230/LIPIcs.ECRTS.2025.7
Period Assignment for Real-Time Cascade Control Tasks Under Stability and Schedulability Constraints

Authors: Ismail Hawila, Liliana Cucu-Grosjean, and Slim Ben Amor

Published in: LIPIcs, Volume 335, 37th Euromicro Conference on Real-Time Systems (ECRTS 2025)

Abstract
Existing results for cyber-physical systems have been proposed to merge the requirements associated to the stability of the physical components and the schedulability of the cyber components. Nevertheless, none of the existing results has studied these requirements for multiple real-time cascade control tasks where their periods choice are dependent and affect stability. In this paper, we propose a methodology to evaluate the periods of the real-time cascade control tasks that ensures stability of the physical components, then we present a co-design problem for the period choice that guarantees good performance of the physical components and schedulability of the cyber components under fixed-priority scheduling. We then evaluate this methodology on a real use-case of a drone system. Results show the importance of studying these requirements together as their relation has an impact on stable periods range.
Cite as

Ismail Hawila, Liliana Cucu-Grosjean, and Slim Ben Amor. Period Assignment for Real-Time Cascade Control Tasks Under Stability and Schedulability Constraints. In 37th Euromicro Conference on Real-Time Systems (ECRTS 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 335, pp. 7:1-7:21, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{hawila_et_al:LIPIcs.ECRTS.2025.7,
  author =	{Hawila, Ismail and Cucu-Grosjean, Liliana and Ben Amor, Slim},
  title =	{{Period Assignment for Real-Time Cascade Control Tasks Under Stability and Schedulability Constraints}},
  booktitle =	{37th Euromicro Conference on Real-Time Systems (ECRTS 2025)},
  pages =	{7:1--7:21},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-377-5},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{335},
  editor =	{Mancuso, Renato},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECRTS.2025.7},
  URN =		{urn:nbn:de:0030-drops-235858},
  doi =		{10.4230/LIPIcs.ECRTS.2025.7},
  annote =	{Keywords: Real-time Systems, Cascade Control, Physical Stability, Control Performance}
}
Document
DOI: 10.4230/OASIcs.NG-RES.2025.1
Programming Time-Predictable Processors with Lingua Franca

Authors: Magnus Mæhlum, Erling Rennemo Jellum, Shaokai Lin, Marten Lohstroh, Martin Schoeberl, Sverre Hendseth, and Edward A. Lee

Published in: OASIcs, Volume 128, Sixth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2025)

Abstract
Precision-timed (PRET) machines are an alternative to modern processors that provide precise control over the timing of software execution. This paper describes a platform for developing predictable real-time embedded systems that pair PRET machines with Lingua Franca (LF), a recent reactor-based coordination language with temporal semantics. Specifically, we port LF to FlexPRET, a PRET machine with flexible hardware thread scheduling. We evaluate single-threaded LF with a tight control loop style application on four embedded platforms, including the FlexPRET. The results reveal the underlying platform’s timing variability and how LF plus FlexPRET can remedy this timing variability. Finally, we compare single-threaded to multithreaded LF, again concerning timing. The four embedded platforms used are FlexPRET (bare-metal), RP2040 (bare-metal), nRF52 (with Zephyr), and Raspberry Pi 3b+ (with Linux). Our results indicate that FlexPRET with LF is attractive when precise timing is essential.
Cite as

Magnus Mæhlum, Erling Rennemo Jellum, Shaokai Lin, Marten Lohstroh, Martin Schoeberl, Sverre Hendseth, and Edward A. Lee. Programming Time-Predictable Processors with Lingua Franca. In Sixth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2025). Open Access Series in Informatics (OASIcs), Volume 128, pp. 1:1-1:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{maehlum_et_al:OASIcs.NG-RES.2025.1,
  author =	{M{\ae}hlum, Magnus and Jellum, Erling Rennemo and Lin, Shaokai and Lohstroh, Marten and Schoeberl, Martin and Hendseth, Sverre and Lee, Edward A.},
  title =	{{Programming Time-Predictable Processors with Lingua Franca}},
  booktitle =	{Sixth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2025)},
  pages =	{1:1--1:13},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-366-9},
  ISSN =	{2190-6807},
  year =	{2025},
  volume =	{128},
  editor =	{Yomsi, Patrick Meumeu and Wildermann, Stefan},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2025.1},
  URN =		{urn:nbn:de:0030-drops-229876},
  doi =		{10.4230/OASIcs.NG-RES.2025.1},
  annote =	{Keywords: Real-time systems, time-predictable architecture, embedded system, coordination language}
}
Document
Complete Volume
DOI: 10.4230/OASIcs.NG-RES.2023
OASIcs, Volume 108, NG-RES 2023, Complete Volume

Authors: Federico Terraneo and Daniele Cattaneo

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
OASIcs, Volume 108, NG-RES 2023, Complete Volume
Cite as

Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, pp. 1-98, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@Proceedings{terraneo_et_al:OASIcs.NG-RES.2023,
  title =	{{OASIcs, Volume 108, NG-RES 2023, Complete Volume}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{1--98},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023},
  URN =		{urn:nbn:de:0030-drops-177300},
  doi =		{10.4230/OASIcs.NG-RES.2023},
  annote =	{Keywords: OASIcs, Volume 108, NG-RES 2023, Complete Volume}
}
Document
Front Matter
DOI: 10.4230/OASIcs.NG-RES.2023.0
Front Matter, Table of Contents, Preface, Conference Organization

Authors: Federico Terraneo and Daniele Cattaneo

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
Front Matter, Table of Contents, Preface, Conference Organization
Cite as

Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, pp. 0:i-0:x, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{terraneo_et_al:OASIcs.NG-RES.2023.0,
  author =	{Terraneo, Federico and Cattaneo, Daniele},
  title =	{{Front Matter, Table of Contents, Preface, Conference Organization}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{0:i--0:x},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023.0},
  URN =		{urn:nbn:de:0030-drops-177312},
  doi =		{10.4230/OASIcs.NG-RES.2023.0},
  annote =	{Keywords: Front Matter, Table of Contents, Preface, Conference Organization}
}
Document
Invited Talk
DOI: 10.4230/OASIcs.NG-RES.2023.1
Control Systems in the Presence of Computational Problems (Invited Talk)

Authors: Martina Maggio

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
Feedback control is a central enabling technology in a wide range of applications. Control systems are at the core of energy distribution infrastructure, regulate the behaviour of engines in vehicles, and are embedded in household appliances like washing machines. Control is centred around the feedback mechanism. Sensors provide information about the current state of the physical environment. This is used to compute suitable control actions to fulfil performance requirements, that are then implemented by actuators. For example, adaptive cruise control systems use measurements from a range of sensors to determine how to adjust the throttle to automatically regulate the vehicle’s speed, while maintaining a safe distance from vehicles ahead. Control actions are often calculated using hardware and software. Hence, the computation of the new control signals is subject to accidental faults, systematic issues, and software bugs. In practice, these computational problems are often ignored. But when can this be done safely? This talk will introduce a framework for analyzing the behaviour of control software subject to computational problems. The focus will be on the development of tools that can certify when control software is able to fulfil the system requirements, despite the presence of computational problems.
Cite as

Martina Maggio. Control Systems in the Presence of Computational Problems (Invited Talk). In Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, p. 1:1, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{maggio:OASIcs.NG-RES.2023.1,
  author =	{Maggio, Martina},
  title =	{{Control Systems in the Presence of Computational Problems}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{1:1--1:1},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023.1},
  URN =		{urn:nbn:de:0030-drops-177320},
  doi =		{10.4230/OASIcs.NG-RES.2023.1},
  annote =	{Keywords: control systems, fault tolerance}
}
Document
DOI: 10.4230/OASIcs.NG-RES.2023.2
IRQ Coloring: Mitigating Interrupt-Generated Interference on ARM Multicore Platforms

Authors: Diogo Costa, Luca Cuomo, Daniel Oliveira, Ida Maria Savino, Bruno Morelli, José Martins, Fabrizio Tronci, Alessandro Biasci, and Sandro Pinto

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
Mixed-criticality systems, which consolidate workloads with different criticalities, must comply with stringent spatial and temporal isolation requirements imposed by safety-critical standards (e.g., ISO26262). This, per se, has proven to be a challenge with the advent of multicore platforms due to the inner interference created by multiple subsystems while disputing access to shared resources. With this work, we pioneer the concept of Interrupt (IRQ) coloring as a novel mechanism to minimize the interference created by co-existing interrupt-driven workloads. The main idea consists of selectively deactivating specific ("colored") interrupts if the QoS of critical workloads (e.g., Virtual Machines) drops below a well-defined threshold. The IRQ Coloring approach encompasses two artifacts, i.e., the IRQ Coloring Design-Time Tool (IRQ DTT) and the IRQ Coloring Run-Time Mechanism (IRQ RTM). In this paper, we focus on presenting the conceptual IRQ coloring design, describing the first prototype of the IRQ RTM on Bao hypervisor, and providing initial evidence about the effectiveness of the proposed approach on a synthetic use case.
Cite as

Diogo Costa, Luca Cuomo, Daniel Oliveira, Ida Maria Savino, Bruno Morelli, José Martins, Fabrizio Tronci, Alessandro Biasci, and Sandro Pinto. IRQ Coloring: Mitigating Interrupt-Generated Interference on ARM Multicore Platforms. In Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, pp. 2:1-2:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{costa_et_al:OASIcs.NG-RES.2023.2,
  author =	{Costa, Diogo and Cuomo, Luca and Oliveira, Daniel and Savino, Ida Maria and Morelli, Bruno and Martins, Jos\'{e} and Tronci, Fabrizio and Biasci, Alessandro and Pinto, Sandro},
  title =	{{IRQ Coloring: Mitigating Interrupt-Generated Interference on ARM Multicore Platforms}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{2:1--2:13},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023.2},
  URN =		{urn:nbn:de:0030-drops-177333},
  doi =		{10.4230/OASIcs.NG-RES.2023.2},
  annote =	{Keywords: IRQ coloring, Interrupt Interference, Mixed-Criticality Systems, Hypervisors, Bao, Arm}
}
Document
DOI: 10.4230/OASIcs.NG-RES.2023.3
Beyond the Threaded Programming Model on Real-Time Operating Systems

Authors: Erling Rennemo Jellum, Shaokai Lin, Peter Donovan, Efsane Soyer, Fuzail Shakir, Torleiv Bryne, Milica Orlandic, Marten Lohstroh, and Edward A. Lee

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
The use of a real-time operating system (RTOS) raises the abstraction level for embedded systems design when compared to traditional bare-metal programming, resulting in simpler and more reusable application code. Modern RTOSes for resource-constrained platforms, like Zephyr and FreeRTOS, also offer threading support, but this kind of shared memory concurrency is a poor fit for expressing the reactive and interactive behaviors that are common in embedded systems. To address this, alternative concurrency models like the actor model or communicating sequential processes have been proposed. While those alternatives enable reactive design patterns, they fail to deliver determinism and do not address timing. This makes it difficult to verify that implemented behavior is as intended and impossible to specify timing constraints in a portable way. This makes it hard to create reusable library components out of common embedded design patterns, forcing developers to keep reinventing the wheel for each application and each platform. In this paper, we introduce the embedded target of Lingua Franca (LF) as a means to move beyond the threaded programming model provided by RTOSes and improve the state of the art in embedded programming. LF is based on the reactor model of computation, which is reactive, deterministic, and timed, providing a means to express concurrency and timing in a platform-independent way. We compare the performance of LF versus threaded C code - both running on Zephyr - in terms of response time, timing precision, throughput, and memory footprint.
Cite as

Erling Rennemo Jellum, Shaokai Lin, Peter Donovan, Efsane Soyer, Fuzail Shakir, Torleiv Bryne, Milica Orlandic, Marten Lohstroh, and Edward A. Lee. Beyond the Threaded Programming Model on Real-Time Operating Systems. In Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, pp. 3:1-3:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{jellum_et_al:OASIcs.NG-RES.2023.3,
  author =	{Jellum, Erling Rennemo and Lin, Shaokai and Donovan, Peter and Soyer, Efsane and Shakir, Fuzail and Bryne, Torleiv and Orlandic, Milica and Lohstroh, Marten and Lee, Edward A.},
  title =	{{Beyond the Threaded Programming Model on Real-Time Operating Systems}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{3:1--3:13},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023.3},
  URN =		{urn:nbn:de:0030-drops-177348},
  doi =		{10.4230/OASIcs.NG-RES.2023.3},
  annote =	{Keywords: Real time, concurrency, reactors, Lingua Franca, RTOS}
}
Document
DOI: 10.4230/OASIcs.NG-RES.2023.4
Efficient Abstraction of Clock Synchronization at the Operating System Level

Authors: Alessandro Sorrentino, Federico Terraneo, and Alberto Leva

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
Distributed embedded systems are emerging and gaining importance in various domains, including industrial control applications where time determinism - hence network clock synchronization - is fundamental. In modern applications, moreover, this core functionality is required by many different software components, from OS kernel and radio stack up to applications. An abstraction layer devoted to handling time needs therefore introducing, and to encapsulate time corrections at the lowest possible level, the said layer should take the form of a timer device driver offering a Virtual Clock to the entire system. In this paper we show that doing so introduces a nonlinearity in the dynamics of the clock, and we design a controller based on feedback linearization to handle the issue. To put the idea to work, we extend the Miosix RTOS with a generic interface allowing to implement virtual clocks, including the newly designed controller that we call FLOPSYNC-3 after its ancestor. Also, we introduce the resulting virtual clock in the TDMH [Terraneo et al., 2018] real-time wireless mesh protocol.
Cite as

Alessandro Sorrentino, Federico Terraneo, and Alberto Leva. Efficient Abstraction of Clock Synchronization at the Operating System Level. In Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, pp. 4:1-4:11, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{sorrentino_et_al:OASIcs.NG-RES.2023.4,
  author =	{Sorrentino, Alessandro and Terraneo, Federico and Leva, Alberto},
  title =	{{Efficient Abstraction of Clock Synchronization at the Operating System Level}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{4:1--4:11},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023.4},
  URN =		{urn:nbn:de:0030-drops-177357},
  doi =		{10.4230/OASIcs.NG-RES.2023.4},
  annote =	{Keywords: Clock synchronization, Real-time operating systems, Embedded software, Real-time control}
}
Document
DOI: 10.4230/OASIcs.NG-RES.2023.5
Response Time Analysis for RT-MQTT Protocol Grounded on SDN

Authors: Ehsan Shahri, Paulo Pedreiras, and Luis Almeida

Published in: OASIcs, Volume 108, Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)

Abstract
The current industry trend is to replace the use of custom components with standards-based Commercially available Off-The-Shelf (COTS) based hardware and protocols. Furthermore, the emergence of new industrial paradigms, such as Industry 4.0 and the Industrial Internet of Things, sets additional requirements regarding e.g. scale, transparency, agility, flexibility and efficiency. Therefore, in these domains, application layer protocols such as Message Queuing Telemetry Transport protocol (MQTT) are gaining popularity, in result of their simplicity, scalability, low resource-usage and decoupling between end nodes. However, such protocols were not designed for real-time applications, missing key features such as determinism and latency bounds. A recent work proposed extending MQTT with real-time services, taking advantage of Software Defined Networking (SDN) to manage the network resource. These extensions allow applications to specify real-time requirements that are then captured by a resource manager and used to reserve the necessary resources at the network layer. This paper shows that such MQTT extended architecture is analyzable from a worst-case timing perspective. We derive a system model that captures the real-time features and we present a response-time analysis to assess the schedulability of the real-time traffic. Finally, we validate the analysis with a set of experimental results.
Cite as

Ehsan Shahri, Paulo Pedreiras, and Luis Almeida. Response Time Analysis for RT-MQTT Protocol Grounded on SDN. In Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023). Open Access Series in Informatics (OASIcs), Volume 108, pp. 5:1-5:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)

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@InProceedings{shahri_et_al:OASIcs.NG-RES.2023.5,
  author =	{Shahri, Ehsan and Pedreiras, Paulo and Almeida, Luis},
  title =	{{Response Time Analysis for RT-MQTT Protocol Grounded on SDN}},
  booktitle =	{Fourth Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2023)},
  pages =	{5:1--5:15},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-268-6},
  ISSN =	{2190-6807},
  year =	{2023},
  volume =	{108},
  editor =	{Terraneo, Federico and Cattaneo, Daniele},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2023.5},
  URN =		{urn:nbn:de:0030-drops-177364},
  doi =		{10.4230/OASIcs.NG-RES.2023.5},
  annote =	{Keywords: Real-time systems, OpenFlow, fixed-priority non-preemptive scheduling, response time analysis, MQTT}
}
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