In the recent past, wireless sensor networks have found their way into a wide variety of applications and systems with vastly varying requirements characteristics. As consequence, it is becoming increasingly difficult to discuss typical regarding hardware issues software support. This particularly problematic in multidisciplinary research area such as networks, where close collaboration between users, application domain experts, designers, developers needed implement efficient systems. this...

Wireless sensor networks (WSNs) consist of large populations wirelessly connected nodes, capable computation, communication, and sensing. Sensor nodes cooperate in order to merge individual readings into a high-level sensing result, such as integrating time series position measurements velocity estimate. The physical is key element this process called data fusion. Hence, synchronization crucial component WSNs. We argue that schemes developed for traditional NTP [23] are ill-suited WSNs...

Ubiquitous computing environments are typically based upon ad hoc networks of mobile devices. These devices may be equipped with sensor hardware to sense the physical environment and attached real world artifacts form so-called smart things. The data sensed by various things can then combined derive knowledge about environment, which in turn enables "react" intelligently their environment. For this fusion, temporal relationships (X happened before Y) real-time issues Y happended within a...

The developed world is awash with sensors. However, they are typically locked into unimodal closed systems. To unleash their full potential, access to sensors should be opened such that data and services can integrated available in other information systems, facilitating novel applications based on the state of real world. We describe our vision architecture a Semantic Web Things: service infrastructure makes deployment use semantic involving Internet-connected almost as easy building,...

Recent technological innovations allow compact radios to transmit over long distances with minimal energy consumption and could drastically affect the way Internet of Things (IoT) technologies communicate in near future. By extending communication range links, it is indeed possible reduce network diameter a point that each node can almost every other directly. This simplifies communication, removing need routing, significantly reduces overhead data collection. Long-range low-power wireless...

Ubiquitous computing environments are typically based upon ad hoc networks of mobile devices. These devices may be equipped with sensor hardware to sense the physical environment and attached real world artifacts form so-called smart things. The data sensed by various things can then combined derive knowledge about environment, which in turn enables "react" intelligently their environment. For this fusion, temporal relationships (X happened before Y) real-time issues Y happended within a...

Middleware for sensor networks aims to support the development of applications large populations wirelessly connected nodes capable computation, communication, and sensing. We examine purpose, functionality, characteristics such middleware.

The increasing penetration of the real world with embedded and globally networked sensors leads to formation Internet Things, offering global online access current state world. We argue that on top this realtime data, a Web Things is needed, software infrastructure allows construction applications involving sensor-equipped real-world entities living in Things. A key service for such an search engine supports lookup exhibit certain as perceived by sensors. In contrast existing engines, has...

Article The Lighthouse Location System for Smart Dust Author: Kay Römer View Profile Authors Info & Claims MobiSys '03: Proceedings of the 1st international conference on Mobile systems, applications and servicesMay 2003 Pages 15–30https://doi.org/10.1145/1066116.1189036Published:05 May 2003Publication History 88citation690DownloadsMetricsTotal Citations88Total Downloads690Last 12 Months24Last 6 weeks9 Get Citation AlertsNew Alert added!This alert has been successfully added will be sent...

We consider configuration of wireless sensor networks, where certain functions must be automatically assigned to nodes, such that the properties a node (e.g., remaining energy, network neighbors) match requirements function. Essentially, nodes take on roles in as result configuration. To help developers with tasks for variety applications, we propose generic role assignment programming abstraction, and rules their can easily specified using language. present specification language...

Medium access control for wireless sensor networks has been a very active research area the past couple of years. The literature presents an alphabet soup medium protocols with almost all works focusing only on energy efficiency. There is much more innovative work to be done at MAC layer, but current efforts are not addressing hard unsolved problems. Majority appearing in "least publishable incremental improvements" over popular S-MAC [1] protocol. In this paper we present directions future...

Link quality estimation is a thorny problem in wireless sensor networks, because its accuracy affects the design and efficiency of networking protocols applications. Especially context low-power wireless, estimating link poses sort catch-22 dilemma, whereby large number packet samples are required to accurately estimate channel, but only few should be used due limited energy resources. This paradox becomes even more severe mobile since high variability medium imposes stricter constraints on...

A large body of work has shown that ultra-wideband (UWB) technology enables accurate indoor localization and tracking thanks to its high time-domain resolution. Existing systems, however, are typically designed localize only a limited number tags, involve the exchange several messages following given schedule. As result, scalability current solutions in terms tag density is limited, as well their efficiency responsiveness. In this paper, we present SnapLoc, UWB-based system allows an...

A large number of low-power wireless communication protocols has been proposed in the last decade by both academia and industry an attempt to deliver information increasingly reliable, timely, energy-efficient manner. However, their level dependability rarely benchmarked under same settings environmental conditions. In this paper we present execution results a competition aimed evaluate state-of-the-art settings, push performance limit. We define scenario emulating operation sensor network...

We are observing an increasing trend of connecting embedded sensors and sensor networks to the Internet publishing their output on Web. believe that this development is a precursor Web Things, which gives real-world objects places presence not only contains static description these entities, but also real-time state. Just as document searches have become one most popular services Web, we argue search for entities (i.e., people, places, things) will equally important. However, in contrast...

Medical measurements and clinical trials are often carried out in controlled lab settings - severely limiting the realism duration of such studies. Our goal is henceforth to design a body sensor network for unobtrusive highly accurate profiling parameters over weeks realistic environments. One example application monitoring impact sleep deprivation on periodic processes human known as circadian rhythms, which requires skin temperature across with real-time feedback remote medic. We analyze...