Simulation and Experimental Evaluation of a Flexible Time Triggered Ethernet Architecture Applied in Satellite Nano/Micro Launchers

Eramo, V.; Lavacca, Francesco G.; Valente, Francesco; Pisculli, Andrea; Caporossi, Stefano

doi:10.3390/aerospace5030084

Cited by 11 publications

(4 citation statements)

References 14 publications

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“…To face the temporal requirements, an innovative communication system, the Flexible Time Triggered Ethernet (FTTE), for a next-generation launcher has been proposed in [16]. This solution involves the use of traditional Ethernet switches and the definition of a scheduling algorithm for messages running in the end systems and able to avoid bandwidth resource contention in the network links, [17], [18], [19] .…”

Section: Related Workmentioning

confidence: 99%

Proposal and Investigation of a Lite Time Sensitive Networking Solution for the Support of Real Time Services in Space Launcher Networks

Fiori,

Lavacca,

Valente

et al. 2024

IEEE Access

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Most launcher networks are based on proprietary buses such as MIL-STD-1553B whose low bandwidth limits the introduction of new services of suitable characteristics. Ethernet technology, because of its low cost and high performance, has been considered an excellent candidate for its use in launcher networks. The real time Ethernet solutions based on the Time Sensitive Networking (TSN) standards seem the most suitable because of its multi-vendor product characteristics. In this paper we propose a real time Ethernet solution for aerospace applications in which negligible jitter services has to be guaranteed. The proposed solution is based on the following TSN standards: IEEE 802.1AS/ASrev as synchronization protocol and 802.1Qbv-2015 for deterministic traffic scheduling. To improve both the bandwidth effective and the frame delay the solution is also based on a change in the management of the Priority Code Point field in IEEE 802.1Q standard. The optimal scheduling problem is formulated so as to minimize the makespan, defined as the time needed to deliver all of the messages of an elementary cycle. The problem has been resolved with the CPLEX solver and the proposed solution has been evaluated in terms of both delay and bandwidth effective by comparing its performance with the TTEthernet, FTTEthernet benchmark solutions. The obtained results in a real traffic scenario characterized by the set of messages of the VEGA launcher show how the proposed solution allows for the same performance of TTEthernet, i.e., the solution of proprietary and real-time Ethernet with better performance.

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Section: Related Workmentioning

confidence: 99%

Proposal and Investigation of a Lite Time Sensitive Networking Solution for the Support of Real Time Services in Space Launcher Networks

Fiori,

Lavacca,

Valente

et al. 2024

IEEE Access

Self Cite

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“…According to clock synchronisation, we have C i,j r (t2) ≤ Slot i,j st (f ) + Slot i,j len (f ) + GE + Π To validate (12), we need The validation property is clearly proved by the requirements R1 and R2, first requirement (R1) ensures that a frame transmitted by a non-faulty transmitter will be passed by its non-faulty bus guardian whereas second requirement (R2) makes sure that a frame passed by non-faulty bus guardian should be received by all non-faulty receivers.…”

Section: Figure 6: Slot Window Timing Parametersmentioning

confidence: 99%

A Flexible Communication Protocol With Guaranteed Determinism for Distributed, Safety-Critical Real-Time Systems

2022

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Dependable, safety-critical real-time (SCRT) systems are becoming increasingly important and complex. Examples of such systems are autonomous or self-driving cars which are poised to revolutionise the transport industry. A critical part of these SCRT systems is the network communication protocol that is used by components in an SCRT system to exchange data. Communication protocols for SCRT systems are required to exhibit predictable, worst-case execution times and thus have to be designed in a more static and less flexible way. To ensure this predictability, current state-of-art communication protocols for SCRT systems are based on the Time-Triggered Architecture (TTA), where static and equal-length time-slots are used for all nodes to access the communication channel, irrespective of the size of their transmission payload. This determinism forms the basis of predictable timing, behaviour and fault tolerance. However, this determinism comes at the cost of poor channel and bandwidth utilisation, which hinders the development of SCRT systems. In this paper, we propose a more flexible approach, INCUS+, that allocates the slot length of a node based on its transmission requirements in a Time Division Multiple Access (TDMA) round. We achieve this while retaining the level of dependability required for SCRT systems and ensuring fail-silence. We validate this through formal verification of the timing parameters for the transmission windows of all participating nodes as well as independent bus guardians. Our design exhibits a significant improvement in bandwidth and channel utilisation, as we demonstrate in an autonomous vehicle case study.INDEX TERMS event-triggered communication, fault tolerance, flexibility, in-vehicle networks, real-time communication, safety-critical systems, time sensitive networking, time-triggered communication.

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“…Indeed, nano and micro launch vehicles (NMLVs) may become a viable solution to make launch costs of nano-and micro-satellites more competitive. Eramo et al [14] present an experimental investigation of an Ethernet-based communication system to be implemented onboard NMLVs for interconnecting with the hosted payloads, showing how their solution has performance comparable to the much more expensive alternative, the TTEthernet standard.…”

Section: Contributionsmentioning

confidence: 99%

Verification Approaches for Nano- and Micro-Satellites

Modenini

Tortora

2020

Aerospace

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Simulation and Experimental Evaluation of a Flexible Time Triggered Ethernet Architecture Applied in Satellite Nano/Micro Launchers

Cited by 11 publications

References 14 publications

Proposal and Investigation of a Lite Time Sensitive Networking Solution for the Support of Real Time Services in Space Launcher Networks

Proposal and Investigation of a Lite Time Sensitive Networking Solution for the Support of Real Time Services in Space Launcher Networks

A Flexible Communication Protocol With Guaranteed Determinism for Distributed, Safety-Critical Real-Time Systems

Verification Approaches for Nano- and Micro-Satellites

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