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Safety Analysis for Controller Handover in Mobile Systems
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Electrical Engineering (EES), Information Science and Engineering.ORCID iD: 0000-0002-3595-2787
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Electrical Engineering (EES), Information Science and Engineering.ORCID iD: 0000-0001-6682-6559
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2017 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Next generation mobile networks are envisioned to provide support for real-time control applications. One of the main aspects of these systems is that the location of the controller may be separated from the location of sensing and actuation. This promises benefits in terms of an increased flexibility, lower costs due to resource sharing, and higher computational capabilities. This paper focuses on one aspect of such systems, specifically, the controller handover. During a controller handover, a control process is moved from one point of computation to another at runtime. A possible reason for performing such a handover is to move the control process to a controller with better channel conditions. The safety of the handover is analyzed using a probabilistic reachability analysis by modeling the handover procedure as a stochastic hybrid system. Based on this safety analysis, a safety-oriented handover triggering rule is proposed. This triggering rule is shown to be dependent on the instantaneous state of the plant, in contrast to handover in mobile networks where it is only dependent on the state of the communication links. A vehicle platoon is considered as an example scenario, which is controlled by a base station of a mobile network. While driving, the platoon will move out of the communication range of the base station, so the control process needs to be moved to the next base station. Simulations illustrate the conditions for a safe execution of so called hard and soft handover protocols.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 50, no 1, p. 10090-10095
National Category
Telecommunications Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-205361DOI: 10.1016/j.ifacol.2017.08.1782ISI: 000423965100177Scopus ID: 2-s2.0-85031797242OAI: oai:DiVA.org:kth-205361DiVA, id: diva2:1088739
Conference
IFAC 2017 World Congress, Toulouse, France The 20th World Congress of the International Federation of Automatic Control, 9-14 July 2017
Funder
ICT - The Next GenerationKnut and Alice Wallenberg FoundationSwedish Research Council
Note

QC 20170811

Available from: 2017-04-14 Created: 2017-04-14 Last updated: 2018-03-08Bibliographically approved

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Schiessl, Sebastian

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van Dooren, DirkSchiessl, SebastianMolin, AdamGross, JamesJohansson, Karl Henrik
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