Oana-Teodora Iova

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The IPv6 Routing Protocol for Low-Power and Lossy Networks (RPL) is one of the emerging routing standards for multihop Wireless Sensor Networks (WSN). RPL is based on the construction of a Destination-Oriented Directed Acyclic Graph (DODAG), which offers a loop-free topology to route data packets. While several routing metrics have been proposed in the(More)
The devices composing Wireless Sensor Networks (WSN) are very limited in terms of memory, processing power and battery. RPL has emerged as the de facto routing standard in low-power and lossy networks. While most of the proposals focus on minimizing the global energy consumption, we aim here at designing an energy-balancing routing protocol: each node(More)
The devices composing Wireless Sensor Networks (WSN) are very limited in terms of memory, processing power and battery. We need efficient routing algorithms to ensure a long lifetime of the WSN. However, many solutions focus on minimizing the average energy consumption of all the nodes. Since the lifetime is rather given by the death of the first node or by(More)
RPL, the IPv6 Routing Protocol for Low-Power and Lossy Networks, is considered the de facto routing protocol for the Internet of Things (IoT). Since its standardization, RPL contributed to the advancement of communications in the world of tiny, embedded, networking devices, by providing, along with other standards, a baseline architecture for IoT. Several(More)
RPL, the IPv6 Routing Protocol for Low-Power and Lossy Networks, supports both upward and downward traffic. The latter is fundamental for actuation, for queries, and for any bidirectional protocol such as TCP, yet its support is compromised by memory limitation in the nodes. In RPL storing mode, nodes store routing entries for each destination in their(More)
IEEE 802.15.4 represents a widely used MAC-layer standard for Wireless Sensor Networks. In multihop topologies, the protocol exploits a cluster-tree and organizes the transmissions by alternating sleeping and active periods in a superframe delimited by beacons. In this paper, we propose a new Contention Broadcast Only Period to limit beacon collisions and(More)
Low-Power Lossy Networks (LLNs) are at the core of many Internet of Things solutions. Significant standardization effort has been put in creating a protocol stack suited for LLNs. Among these standards, IEEE802.15.4-2011 and RPL allow LLN devices to form a multi-hop mesh network. Today, RPL creates a routing topology without a priori knowledge about the(More)