| 1. |
- Ashjaei, Mohammad, et al.
(författare)
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Evaluation of dynamic reconfiguration architecture in multi-hop switched ethernet networks
- 2014
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Ingår i: 19th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2014. - 9781479948468 ; , s. Article number 7005322-
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Konferensbidrag (refereegranskat)abstract
- On-the-fly adaptability and reconfigurability are recently becoming an interest in real-time communications. To assure a continued real-time behavior, the admission control with a quality-of-service mechanism is required, that screen all adaptation and reconfiguration requests. In the context of switched Ethernet networks, the FTT-SE protocol provides adaptive real-time communication. Recently, we proposed two methods to perform the online reconfiguration in multi-hop FTT-SE architectures. However, the methods lack the experimental evaluation. In this paper, we evaluate both methods in terms of the reconfiguration time.
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| 2. |
- Ashjaei, Mohammad, et al.
(författare)
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Response time analysis of multi-hop HaRTES Ethernet Switch networks
- 2014
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Ingår i: IEEE Int. Workshop Factory Commun. Syst. Proc. WFCS. - 9781479932351
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Konferensbidrag (refereegranskat)abstract
- In this paper we focus on micro-segmented switched-Ethernet networks with HaRTES switches. HaRTES switches provide synchronous and asynchronous real-time traffic scheduling, dynamic Quality-of-Service adaptation and transparent integration of real-time and non-real-time nodes. Herein we investigate the challenges of connecting multiple HaRTES switches in order to build multi-hop communication and we propose a method, named Distributed Global Scheduling, to handle the traffic forwarding in such an architecture while preserving the unique properties of the single HaRTES switch case. Moreover, we develop a response time analysis for the method. We also evaluate the level of pessimism embodied in the anal-ysis. Finally, we show the applicability of the proposed method in an industrial setting by applying it in an automotive case study.
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| 3. |
- Santos, R., et al.
(författare)
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Multi-level hierarchical scheduling in ethernet switches
- 2011
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Ingår i: Embedded Syst. Week, ESWEEK - Proc. ACM Int. Conf. Embedded Softw., EMSOFT. - New York, NY, USA : ACM. - 9781450307147 ; , s. 185-193
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Konferensbidrag (refereegranskat)abstract
- The complexity of Networked Embedded Systems (NES) has been growing steeply, due to increases both in size and functionality, and is becoming a major development concern. This situation is pushing for paradigm changes in NES design methodologies towards higher composability and flexibility. Component-oriented design technologies, in particular supported by server-based scheduling, seem to be good candidates to provide the needed properties. As a response we developed a multi-level hierarchical serverbased architecture for Ethernet switches that provides composability and supports online adaptation and reconfiguration. This paper extends our work, presenting the associated response-time based schedulability analysis, necessary for the admission control procedure. Additionally, we have derived the temporal complexity of the analysis, which is shown to be O(n2), where n is the number of higher priority components associated with a given server. Finally, we present a proof-of-concept implementation and a set of experimental results that validates the analysis. Copyright © 2011 ACM.
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