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dc.creatorTiago Semprebom
dc.creatorCarlos Montez
dc.creatorRicardo Moraes
dc.creatorFrancisco Vasques
dc.creatorPaulo José Portugal
dc.description.abstractThe IEEE 802.15.4 standard offers a flexible communication solution for low-ratewireless small area networks. When the beacon mode is enabled, real-time communication ispossible by using the Guaranteed Time Slots (GTS) mechanism. However, the beacon-enabledmode only supports a maximum of seven GTS allocated in each superframe, preventing othernodes to benefit from the guaranteed service. This paper introduces the SIGHT (Skips In GTSscHeduling for IEEE 802.15.4 neTworks) model, which incorporates a dynamic GTS allocationpolicy for IEEE 802.15.4 networks based on the (m,k)-firm task model. Our approach ensuresthat at least m messages are allocated in a guaranteed slot, for any k consecutive superframes.It adopts a deterministic schedulability test and an on-line prioritization heuristic algorithmcalled Slotted DBP (Distance Based Priority) to attend requests according to this schedulabilitymodel. A simulation model has been developed, in order to compare the behaviour in overloadconditions of the proposed Slotted DBP with other approaches (DWCS and FIFO).
dc.relation.ispartofProceedings of 8th IFAC International Conference on Fieldbuses and Networks in Industrial and Embedded Systems (FeT'2009
dc.subjectEngenharia electrotécnica, electrónica e informática
dc.subjectElectrical engineering, Electronic engineering, Information engineering
dc.titleDynamic GTS scheduling of periodic skippable slots in IEEE 802.15.4 Wireless Sensor Networks
dc.typeArtigo em Livro de Atas de Conferência Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.subject.fosCiências da engenharia e tecnologias::Engenharia electrotécnica, electrónica e informática
dc.subject.fosEngineering and technology::Electrical engineering, Electronic engineering, Information engineering
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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