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Low-Power and Lossy-Network (LLN) are usually composed of static nodes, but the increase demand for mobility in mobile robotic and dynamic environment raises the question how the a routing protocol for Low-Power and Lossy-Networks such as (RPL) would perform in where a mobile sink is deployed. In this paper we investigate and evaluate the behaviour of the RPL protocol in fixed and mobile sink environments...
Certain Wireless Sensor Network (WSN) applications such as patient monitoring, smart grid, and equipment condition monitoring require accurate estimation of specific WSN parameters such as end-to-end delay, reliability and power consumption. The estimation of these parameters calls for an accurate and lightweight WSN model that is suitable for the low processing capabilities of sensor nodes. In this...
We introduce TORP - TinyOS Opportunistic Routing Protocol for Wireless Sensor Networks (WSNs). The main motivation is that when a data packet is transmitted, the multiple relay nodes cooperatively select the one which is closest to the destination node to continue forwarding the data packet. TORP attempts to save energy versus traditional deterministic routing protocols by selecting the next forwarding...
Virtual backbone is helpful to reduce computation and communication overhead in wireless networks. Based upon serial Maximum Independent Set (MIS) constructing algorithms, this paper presents a weight and timing based triggering Connected Dominating Set (CDS) constructing algorithm. In the algorithm, the nodes orderly join the MIS one after another, thus it greatly reduces the number of edge nodes,...
In this paper, a study of the behavior of wireless mesh networks is proposed, by considering energy consumption and reliability of the network. The real consumption with different network topologies and different data profiles will be analized. The objective of this work is to establish the framework to carry out energy optimizations in order to reduce the energy consumption without losing the reliability...
In wireless sensor networks, battery life is a key resource that must be conserved as much as possible. Nowadays, the main way of achieve power saving in this type of circuits is to implement low-power RF (Radio Frequency) circuitry and network protocols that try to minimize the number of transmissions by the air. We think that adaptation to RF environment can minimize the power consumption and supply...
The theory of network coding is hardly ever used and cannot be mapped to general wireless sensor network (WSN) topologies without careful consideration of technology constraints. Severe energy constraints and low bandwidth are faced by platforms of low computational power. We show how network coding methods can be implemented with low computational power. We discuss extensive experimentation in simulation...
For large-scale wireless sensor networks (WSNs), a three-layer topology architecture and an algorithm of topology control for its key communication layer are proposed in this paper. In the algorithm, the base station of the network leads the ring periodically to discover the minimum power cost links from base station to each sinks, and a minimum spanning tree will be constructed. This tree will be...
We present the estimation and evaluation of deployment models for sensor networks that exploit different amounts of a-priori information. Topologies generated from the models exhibit minimum energy consumption at maximum sensing coverage. The applied energy model makes use of measurements obtained from real experiments. We consider general sets of interesting points in the phenomena since those exhibit...
One of the most important constraints on wireless sensor network is the low power consumption. Therefore, topology of wireless sensor network must focus on power conservation. It is possible to extend the lifetime of a network by controlling its topology through clustering. Topology control target tracking-oriented based on overlapping clustering in wireless sensor network is proposed in this paper...
This paper presents a new method for power minimization in wireless sensor networks using the ZigBee protocol. A modification of the standard protocol is proposed for use to any low bit-rate data communications application resulting in a ZigBee-like network with considerably reduced power consumption. Time scheduling is proposed to switch on and off the power of the transmitter/receiver circuit, minimizing...
In a wireless sensor network (WSN), the heterogeneous types of sensors can be viewed as intelligent agents that interact with each other locally. The sensors interact with each other either in a cooperative way to form coalitions or in a noncooperative way to deal with conflicts. In this way, the sensors ultimately form desirable topology patterns in terms of various applications. This article addresses...
This paper presents a systematic methodology for designing the adaptation policies of reconfigurable sensor networks. The work is motivated by the need to provide efficient sensing, processing, and networking capabilities under tight hardware, bandwidth, and energy constraints. The design flow includes two main steps: generation of alternative design points representing different performance-cost...
Wireless sensor networks have a wide range of potential, practical and useful applications. However, there are many challenging problems that need to be addressed for efficient operation of wireless sensor networks in real applications. One of the fundamental and important problems in sensor networks is the topology control problem since most sensors are equipped with non-rechargeable batteries and...
Driven by emerging standards, increasing energy costs, and advances in Wireless Sensor Networking, the ldquosmart homerdquo is becoming a reality for the mass market. Over a decade, professional installers have been using proprietary systems, with emergence of standards such as Zigbee, cost effective low-data rate, home solutions are now realizable. This paper presents a cluster based home area network...
For node-intensive sensor networks, hierarchical topology control can effectively save energy. Based on the existing two-layer model, we propose a logical three-tiered topology control model which consist of relay nodes(RNs), application nodes(ANs) and sensor nodes(SNs). Under this architecture, the goal of lower-tier SNs is to sense the playing fields and middle-tier ANs only neeed to gather data...
In a realistic sensor network, in particular with a non-uniform deployment, sensor nodes inevitably have varying workloads. This causes a natural problem that some sensor nodes are subject to excessive power consumption and thus become hot. These hot nodes deplete much earlier resulting in system performance degradation. This paper proposes a systematic approach to design a hotness-aware sensor network...
Topology control and routing protocols are used by designers of wireless packet data networks to lower the node degree, simplify routing and lower the nodes' energy consumption, while preserving strong connectivity. We assume a popular fading channel model and study the impact of several topology control schemes on the transmit power of nodes randomly distributed over a large area according to a Poisson...
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