A Sensor Network Abstraction for Flexible Public Sensing Systems

Abstract

Public Sensing is a new paradigm for developing large-scale sensor networks at low cost by utilizing mobile phones that are already surrounding us in our everyday lives. In this paper we present a sensor network abstraction layer for creating flexible public sensing systems that can execute arbitrary queries. To this effect we develop several algorithms to select mobile nodes for executing a query. These algorithms allow a user to define a trade-off between quality and efficiency of query execution by choosing an appropriate algorithm. Our evaluations show that we can achieve a 99% increase in efficiency with the most efficient approaches and only about 10% decrease in result quality under worst conditions.

PSense: Reducing Energy Consumption in Public Sensing Systems

“…One further optimization goal that is focused on the sensing, is the prevention of redundant sensor readings. Given a predefined point-of-interest and a set of sensor equipped mobile devices in its proximity, Philipp et al [4] show that the mobile devices can be coordinated in such a way that only a small subset of devices is needed to read the sensor data at that point in an effective and efficient way.…”

“…One particular field that already attracted a lot of attention in the research community (e.g. [1], [2]) is the opportunistically gathering of sensor data with mobile devices, also called Public Sensing [3], [4]. By utilizing the build-in sensing facilities of peoples' mobile devices, Public Sensing enables a cheap way of acquiring sensor data without the need for a costly sensor deployment.…”

“…Although the aforementioned work focuses on the system design on a very abstract level, we argue that it is crucial to also take into account the algorithmic challenges that arise from Public Sensing when designing such a system. More precisely, as stressed in [4], most of the prevailing Public Sensing systems assume that the contributing mobile devices continuously fix their position and sample their sensors. Since it is commonly agreed that such a continuous sensing quickly drains a mobile device's battery (e.g.…”

“…Moreover, PSense works on basis of a generic sensor abstraction that is utilized in many Public Sensing systems (e.g. [4], [11], [12]). This makes it deployable for a huge variety of mobile sensing scenarios.…”

Identificação e tratamento dos problemas de desempenho de redes de sensores expostas por arquiteturas orientadas a serviço

“…Uma parte dessa diversidade de pesquisas trata o desenvolvimento de mecanismos de abstração dos elementos da rede que proveem suporte no desenvolvimento, manutenção, publicação e execução de aplicações. Essa linha de pesquisa representa uma tarefa desafiadora e não trivial que visa principalmente preencher uma lacuna que há entre os requisitos de alto nível das aplicações e as complexidades dos elementos que compõem as redes de sensores sem fio (Philipp et al, 2011;Mottola e Picco, 2012;Laukkarinen et al, 2012).…”