Numerous localization protocols in Wireless Sensor Networks are based on Received Signal Strength Indicator. Because absolute positioning is not always available, RSSI popular. More, no extra hardware needed unlike solutions infra-red or ultrasonic. Moreover, the theory gives a as function of distance. However, using distance metric involves errors measured values, resulting path-loss, fading, and shadowing effects. We present experimentation results from three large WSNs, each with up to...

Mobile wireless sensor networks have been extensively deployed for enhancing environmental monitoring and surveillance. The availability of low-cost mobile robots equipped with a variety sensors makes them promising in target coverage tasks. They are particularly suitable where quick, inexpensive, or nonlasting visual sensing solutions required. In this paper, we consider the problem low complexity tracking to cover follow moving targets using flying robots. We tackle by clustering while...

A self-stabilizing algorithm, after transient faults hit the system and place it in some arbitrary global state, recovers finite time without external (e.g., human) intervention. In this paper, we propose a distributed asynchronous silent algorithm for finding minimal k-dominating set of at most [n/(k+1)] processes an identified network size n. We transformer that allows our work under unfair daemon (the weakest scheduling assumption). The complexity solution is O(n) rounds O(Dn <sup...

In this article, experimental results on the Routing Protocol for Low-Power and Lossy Networks (RPL) are presented. We study RPL properties in terms of delivery ratio, control packet overhead dynamicity. The obtained by several experimentations conducted a large wireless sensor network testbed composed more than 250 nodes. real-life scenario (high density convergcast traffic), intrinsic characteristics underlined: path length stability but reduced ratio important overhead. To best our...

A self-stabilizing algorithm, after transient faults hit the system and place it in some arbitrary global state, causes to recover finite time without external (e.g., human) intervention. In this paper, we give a distributed asynchronous silent algorithm for finding minimal k-dominating set of at most ⎾n/k+1⏋ processes an identified network size n. We transformer that allows our work under unfair daemon, weakest scheduling assumption. The complexity solution is O(n) rounds O(Dn3) steps using...

This paper presents experimental results on the Routing Protocol for Low-Power and Lossy Networks (RPL). The RPL properties in terms of delivery ratio, control packet overhead, dynamics robustness are studied. obtained by several experimentations conducted 2 large wireless sensor network testbeds composed more than 100 nodes each. In this real-life scenario (high density convergecast traffic), intrinsic characteristics underlined: path length stability but reduced ratio important overhead....

To gather and transmit data, low cost wireless devices are often deployed in open, unattended possibly hostile environment, making them particularly vulnerable to physical attacks. Resilience is needed mitigate such inherent vulnerabilities risks related security reliability. In this paper, Routing Protocol for Low-Power Lossy Networks (RPL) studied presence of packet dropping malicious compromised nodes. Random behavior data replication have been introduced RPL enhance its resilience...

In this paper, we propose a silent self-stabilizing asynchronous distributed algorithm for constructing kclustering of any connected network with unique IDs. Our stabilizes in O(n) rounds, using O(log n) space per process, where n is the number processes. general case, our constructs O(n/k) k-clusters. If Unit Disk Graph (UDG), then 7.2552k+O(1)competitive, that is, k-clusters constructed by at most 7.2552k + O(1) times minimum possible k-clustering same network. More generally, if an...

This paper presents experimental results on a body area network platform that accurately and precisely captures, processes, wirelessly transmits six- degrees-of-freedom inertial electrocardiogram data in wearable, non-invasive form factor. The is designed to be low-energy enabling health care applications remote monitoring of workers harsh environments. challenges tackled this article include the following: (1) reducing radio channel contention, (2) energy consumption, (3) managing diverse...

The goal of the self-organization is to structure wireless sensor networks (WSN) using a connected logical topology (backbone) or non one (clusters) in order introduce stability and robustness. More, networking protocols based on such virtual structures should lead better performances than classical flat approach. A lot studies deal with performance evaluations topologies terms energy consumption, cardinality, etc. But network mainly assumed fully deployed. In our point view, more accurate...

To provide for reliability in Wireless Sensor Networks (WSNs), Medium Access Control (MAC) protocols must be adapted by mechanisms taking cross-layer approaches into account. We describe AreaCast which is designed enhancing WSNs. a MAC layer mechanism independent of the routing layer, but uses only local topological and information to communication area instead traditional, node-to-node (i.e. unicast). In AreaCast, source node addresses set nodes: an explicit relay chosen as next hop given...

To be efficient, routing protocols in wireless sensor networks suppose to take into account local interactions, noise and collisions. In this work, we propose a protocol suitable for noisy environments. Using the qualitative localization algorithm (QLoP) order select sensors with better signal-to-noise ratio, build logical topology on which apply protocol. We show that received signal strength indicator (RSSI) is not good metric evaluate proximity. provide proximity metric, introduce...

The self-organization paradigm of wireless sensor networks (WSN) deals with an emergent behavior which can be either a connected logical topology (e.g. virtual backbone) or non one clusters): the network is then structured. Based on such view network, communications protocols should more efficient than based classical flat approach. Numerous studies deal performance evaluation these backbones and clusters in terms energy consumption, complexity, etc. Nevertheless, always assumed fully...

This paper investigates the tradeoff between accuracy and complexity cost to predict electrocardiogram values using auto-regressive moving average (ARMA) models in a fully functional body area network (BAN) platform. The proposed BAN platform captures, processes, wirelessly transmits six-degrees

—Mobile and wearable sensing technology stands to provide a wealth of information healthcare providers, allows them envision systems with reduced costs, automated monitoring evaluation, overall improved services. However, the volume data produced by such mobil

This paper investigates the tradeoff between accuracy and complexity cost to predict electrocardiogram values using auto-regressive moving average (ARMA) models in a fully functional body area network (BAN) platform. The proposed BAN platform captures, processes, wirelessly transmits six-degrees-of-freedom inertial data wearable, non-invasive form factor. To reduce number of packets sent, ARMA are used (ECG) values. However, context wearable devices, where computing memory capabilities...

This paper presents experimental results on a fully functional body area network (BAN) platform in terms of energy consumption, delivery ratio and lifespan. The proposed BAN captures, processes, wirelessly transmits six-degrees-of-freedom inertial electrocardiogram data wearable, non-invasive form factor. A dynamic TDMA MAC layer has been implemented over 802.15.4 physical as well 2 lightweight protocols: similarity-based filter to reduce the number packets sent by sensors polynomial...

This paper presents experimental results from a platform consisting of multiple wearable body area networks (BAN) connected to wireless mesh network. The proposed collects, processes and wirelessly transmits medical data BAN control center (MCC) through solar-powered multi-hop proof-of-concept encompasses several innovations. In the BAN, dynamic TDMA MAC layer has been implemented over 802.15.4 physical as well 2 lightweight protocols. To reduce number packet sent by sensors size gateway,...