A measurement study of zigbee-based indoor localization systems under RF interference

Authors:
Seng-Yong Lau;Tsung-Han Lin;Te-Yuan Huang;I-Hei Ng;Polly Huang
Affiliations:
National Taiwan University, Taipei, Taiwan Roc;Harvard University, Cambridge, MA, USA;Stanford University, Stanford, CA, USA;National Taiwan University, Taipei, Taiwan Roc;National Taiwan University, Taipei, Taiwan Roc
Venue:
Proceedings of the 4th ACM international workshop on Experimental evaluation and characterization
Year:
2009

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Abstract

With an expected market value of 2.71 billion in 2016, supporting daily use of real-time location systems in households and commercial buildings is an increasingly important subject of study. A growing problem in providing robust indoor location estimations in real time is the use of wireless transmissions in RF frequencies. Having implemented a simple RSSI-signature-based location system on a 24-node IEEE 802.15.4-based sensor network testbed, we are able to analyze the effect of background IEEE 802.11 traffic on localization error. The measurement results demonstrate that the 80th-percentile of the localization error may increase by 141% at worst in an office building with active use of IEEE 802.11 for data. Such performance degradation results from RSSI reading loss as the beacon messages collide with background traffic.