7 documents found, page 1 of 1
mRPL+: A mobility management framework in RPL/6LoWPAN
Fotouhi, Hossein; Moreira, Daniel; Alves, Mário; Yomsi, Patrick YomsiThe next generation Internet (also known as Internet-of-Things – IoT), will ubiquitously integrate trillions of computing devices of all kinds, shapes and sizes. For this ubiquity to materialize, a key aspect will certainly be interoperability, the capability of different technologies (e.g. different communication protocols at both horizontal and vertical levels, different hardware platforms, different operatin...
mRPL: Boosting mobility in the Internet of Things
Fotouhi, Hossein; Moreira, Daniel; Alves, MárioThe 6loWPAN (the light version of IPv6) and RPL (routing protocol for low-power and lossy links) protocols have become de facto standards for the Internet of Things (IoT). In this paper, we show that the two native algorithms that handle changes in network topology – the Trickle and Neighbor Discovery algorithms – behave in a reactive fashion and thus are not prepared for the dynamics inherent to nodes mobility...
Reliable and Fast Hand-Offs in Low-Power Wireless Networks
Fotouhi, Hossein; Alves, Mário; Zamalloa, Marco Zuniga; Koubâa, AnisHand-off (or hand-over), the process where mobile nodes select the best access point available to transfer data, has been well studied in wireless networks. The performance of a hand-off process depends on the specific characteristics of the wireless links. In the case of low-power wireless networks, hand-off decisions must be carefully taken by considering the unique properties of inexpensive low-power radios....
Smart-HOP: a reliable handoff mechanism for mobile wireless sensor networks
Fotouhi, Hossein; Zúñiga, Marco; Alves, Mário; Koubâa, Anis; Marrón, PedroHandoff processes, the events where mobile nodes select the best access point available to transfer data, have been well studied in cellular and WiFi networks. However, wireless sensor networks (WSN) pose a new set of challenges due to their simple low-power radio transceivers and constrained resources. This paper proposes smart-HOP, a handoff mechanism tailored for mobile WSN applications. This work provides t...
Poster abstract: Smart-HOP: a reliable handoff procedure for supporting mobilit...
Fotouhi, Hossein; Alves, Mário; Koubâa, Anis; Zúñiga, MarcoThis poster abstract presents smart-HOP, a reliable handoff mechanism for mobility support in Wireless Sensor Networks (WSNs). This technique relies on a fuzzy logic approach applied at two levels: the link quality estimation level and the access point selection level. We present the conceptual design of smart-HOP and then we discuss implementation requirements and challenges.
Demo abstract: RadiaLE: a framework for benchmarking link quality estimators
Baccour, Nouha; Jamâa, Maissa Ben; Rosário, Denis do; Koubâa, Anis; Alves, Mário; Becker, Leandro B.; Youssef, Habib; Fotouhi, HosseinLink quality estimation is a fundamental building block for the design of several different mechanisms and protocols in wireless sensor networks (WSN). A thorough experimental evaluation of link quality estimators (LQEs) is thus mandatory. Several WSN experimental testbeds have been designed ([1–4]) but only [3] and [2] targeted link quality measurements. However, these were exploited for analyzing low-power li...
On a reliable handoff procedure for supporting mobility in wireless sensor netw...
Fotouhi, Hossein; Alves, Mário; Koubâa, Anis; Baccour, NouhaWireless sensor network (WSN) applications such as patients’ health monitoring in hospitals, location-aware ambient intelligence, industrial monitoring /maintenance or homeland security require the support of mobile nodes or node groups. In many of these applications, the lack of network connectivity is not admissible or should at least be time bounded, i.e. mobile nodes cannot be disconnected from the rest of ...