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Updated: May 24, 2026

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults

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On connected target coverage for wireless heterogeneous sensor networks with multiple sensing units.

Kuei-Ping Shih1, Der-Jiunn Deng, Ruay-Shiung Chang

  • 1Department of Computer Science & Information Engineering, Tamkang University, Tamshui 251, Taipei, Taiwan;

Sensors (Basel, Switzerland)
|February 21, 2012
PubMed
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This study introduces two schemes, REFS and EEFS, to solve the connected target coverage problem in wireless heterogeneous sensor networks. Both schemes effectively extend network lifetime, with EEFS showing superior performance but REFS offering greater simplicity.

Area of Science:

  • Computer Science
  • Wireless Sensor Networks
  • Network Optimization

Background:

  • The connected target coverage (CTC) problem in wireless heterogeneous sensor networks (WHSNs) is crucial for data delivery.
  • Existing solutions often struggle with the complexity of multiple sensing units and joint coverage/connectivity requirements.
  • Formulating the MU-CTC problem as an Integer Linear Programming (ILP) is computationally intractable due to its NP-complete nature.

Purpose of the Study:

  • To address the multiple sensing unit connected target coverage (MU-CTC) problem in WHSNs.
  • To develop efficient distributed heuristic schemes for prolonging network lifetime.
  • To jointly consider target coverage and network connectivity in WHSNs with multiple sensing units.

Main Methods:

Keywords:
connectivityheterogeneous sensorsmultiple sensing unitstarget coveragewireless sensor networks

Related Experiment Videos

Last Updated: May 24, 2026

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
04:13

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults

Published on: February 8, 2019

  • Formulation of the MU-CTC problem as a connected set cover problem and an Integer Linear Programming (ILP) problem.
  • Development of two distributed heuristic schemes: Remaining Energy First Scheme (REFS) and Energy Efficiency First Scheme (EEFS).
  • REFS prioritizes remaining energy and neighbor decisions; EEFS considers coverage contribution and connectivity for sensor decisions.

    • Main Results:

    • Both REFS and EEFS effectively prolong the network lifetime in WHSNs.
    • EEFS demonstrates superior performance in extending network lifetime compared to REFS.
    • REFS offers advantages in terms of simplicity and reduced communication overhead.

    Conclusions:

    • The proposed REFS and EEFS schemes provide effective solutions for the MU-CTC problem in WHSNs.
    • Jointly optimizing target coverage and connectivity is essential for enhancing WHSN performance.
    • The study presents novel approaches for managing energy and ensuring connectivity in complex sensor networks.