Indoor Positioning Using Femtocells

C.E. Lin, C-S. Hsieh, S-C. Liu, S. Ke, J. Chang

Abstract:	Femtocell has become a mature subsystem to enhance mobile communication for short range applications. Femtocell transmits a fixed pattern signal with a pre-registered ID to identify the message handoff. As a part of mobile communication, the femtocells can be constructed into a local network to coordinate with regular base transceiver stations (BTS) for indoor positioning. By processing the Received Signal Coded Power (RSCP) algorithm, this paper proposes simple algorithms to locate the mobile station (MS). The fingerprinting method and the triangulation method from received signal strength (RSS) are formulated and implemented. The RSS fingerprinting method estimates the MS position from a pre-established reference database; while the RSS triangular method calculates signal strength on the MS for positioning. Both femtocell signals and BTS signals are received to the computation algorithm. An experiment environment installs 3 femtocells in our department building. The results are compared by two methods with the previous BTS signals. The accuracy has greatly improved from the preliminary tests.
Published in:	Proceedings of the ION 2013 Pacific PNT Meeting April 23 - 25, 2013 Marriott Waikiki Beach Resort & Spa Honolulu, Hawaii
Pages:	624 - 630
Cite this article:	Lin, C.E., Hsieh, C-S., Liu, S-C., Ke, S., Chang, J., "Indoor Positioning Using Femtocells," Proceedings of the ION 2013 Pacific PNT Meeting, Honolulu, Hawaii, April 2013, pp. 624-630.
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