Accuracy improvement in sensor localization system utilizing heterogeneous wireless technologies

Takahiro Yamamoto, Shigemi Ishida, Kousaku Izumi, Shigeaki Tagashira, Akira Fukuda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Sensor localization is one of the big problems when building large scale indoor sensor networks because GPS (Global Positioning System) is unavailable in indoor environments. We are developing ZigLoc, a sensor localization system using WiFi APs (access points) as references, which requires no additional infrastructure [1,2]. In ZigLoc, a sensor node measures RSS (received signal strength) of WiFi AP signals using a ZigBee (IEEE 802.15.4) module. Location of a sensor node is then estimated using fingerprints collected for a WiFi localization system. However, ZigLoc exhibits low accuracy due to the RSS offset derived by ZigBee and WiFi modules. The RSS offset is mainly caused by the channel bandwidth difference. In this paper, we present a differential fingerprinting method to improve localization accuracy. Our key idea is that we focus on RSS difference between WiFi APs. RSS difference between APs should be the same when we measure RSS using either ZigBee or WiFi modules. Differential fingerprinting only relies on RSS difference in fingerprint similarity calculation. We conducted experimental evaluations in a practical environment. The experimental evaluations reveal that ZigLoc accuracy was improved by approximately 26 % using the differential fingerprinting method.

Original languageEnglish
Title of host publication2017 10th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
ISBN (Electronic)9784907626310
DOIs
Publication statusPublished - Apr 2 2018
Event10th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017 - Toyama, Japan
Duration: Oct 3 2017Oct 5 2017

Publication series

Name2017 10th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017
Volume2018-January

Other

Other10th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017
CountryJapan
CityToyama
Period10/3/1710/5/17

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All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Computer Science Applications
  • Safety, Risk, Reliability and Quality

Cite this

Yamamoto, T., Ishida, S., Izumi, K., Tagashira, S., & Fukuda, A. (2018). Accuracy improvement in sensor localization system utilizing heterogeneous wireless technologies. In 2017 10th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017 (pp. 1-6). (2017 10th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017; Vol. 2018-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/ICMU.2017.8330074