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The Routing Protocol for Low-Power and Lossy Networks (RPL) constructs routes by using Objective Functions that optimize or constrain the routes it selects and uses. This specification describes the Minimum Rank with Hysteresis Objective Function (MRHOF), an Objective Function that selects routes that minimize a metric, while using hysteresis to reduce(More)
—Several Quality of Service (QoS) architectures and mechanisms have been proposed by standardisation bodies. However, those proposals were not always aligned with the spirit of IP networks. Furthermore, most research activities have focused to date on supporting QoS only within a single administrative domain. In this paper, we demonstrate that it is(More)
End-to-end QoS has been seldom studied in its inter-domain aspects, particularly within the scope of the global Internet and from an engineering perspective. This paper is intended to be a contribution in this direction. Starting from a utopian model that achieves any kind of engineering operations without any specific constraint, we deduce the open issues(More)
  • D Gay, P Levis, +20 authors Tinyos
  • 2005
A sensor network operating system has to be efficient, flexible, and reliable. Energy contraints mean that nodes not only have limited resources, but they must use those resources sparingly. As deployments are application domain specific, a flexible OS lets software make the most of these limited resources in order to meet that applications requirements(More)
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