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Improving Health Monitoring With Adaptive Data Movement in Fog Computing

Authors
  • Cappiello, Cinzia1
  • Meroni, Giovanni1
  • Pernici, Barbara1
  • Plebani, Pierluigi1
  • Salnitri, Mattia1
  • Vitali, Monica1
  • Trojaniello, Diana2
  • Catallo, Ilio2
  • Sanna, Alberto2
  • 1 Dip. Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milan , (Italy)
  • 2 Center for Advanced Technology for Health and Wellbeing, IRCCS San Raffaele Hospital, Milan , (Italy)
Type
Published Article
Journal
Frontiers in Robotics and AI
Publisher
Frontiers Media S.A.
Publication Date
Sep 15, 2020
Volume
7
Identifiers
DOI: 10.3389/frobt.2020.00096
PMID: 33501263
PMCID: PMC7805774
Source
PubMed Central
Keywords
License
Unknown

Abstract

Pervasive sensing is increasing our ability to monitor the status of patients not only when they are hospitalized but also during home recovery. As a result, lots of data are collected and are available for multiple purposes. If operations can take advantage of timely and detailed data, the huge amount of data collected can also be useful for analytics. However, these data may be unusable for two reasons: data quality and performance problems. First, if the quality of the collected values is low, the processing activities could produce insignificant results. Second, if the system does not guarantee adequate performance, the results may not be delivered at the right time. The goal of this document is to propose a data utility model that considers the impact of the quality of the data sources (e.g., collected data, biographical data, and clinical history) on the expected results and allows for improvement of the performance through utility-driven data management in a Fog environment. Regarding data quality, our approach aims to consider it as a context-dependent problem: a given dataset can be considered useful for one application and inadequate for another application. For this reason, we suggest a context-dependent quality assessment considering dimensions such as accuracy, completeness, consistency, and timeliness, and we argue that different applications have different quality requirements to consider. The management of data in Fog computing also requires particular attention to quality of service requirements. For this reason, we include QoS aspects in the data utility model, such as availability, response time, and latency. Based on the proposed data utility model, we present an approach based on a goal model capable of identifying when one or more dimensions of quality of service or data quality are violated and of suggesting which is the best action to be taken to address this violation. The proposed approach is evaluated with a real and appropriately anonymized dataset, obtained as part of the experimental procedure of a research project in which a device with a set of sensors (inertial, temperature, humidity, and light sensors) is used to collect motion and environmental data associated with the daily physical activities of healthy young volunteers.

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