Blumenthal, J., Grossmann, R., Golatowski, F. and Timmermann, D. (2007) Weighted Centroid Localization in Zigbee-Based Sensor Networks. Proceedings of IEEE International Symposium on Intelligent Signal Processing, Alcala de Henares, 3-5 October 2007, 1-6. http://dx.doi.org/10.1109/WISP.2007.4447528
 Gomez, C., Boix, A. and Paradells, J. (2010) Impact of LQI-Based Routing Metrics on the Performance of a One-to-One Routing Protocol for IEEE 802.15.4 Multihop Networks. EURASIP Journal on Wireless Communication and Networking, 2010, Article ID 205407.
 Kaneko, N. and Nagasaka, Y. (2007) Position Estimation Method of Moving Objects by a Two-Point Positioning Technique with Active RFID Technology. Proc. Forum on Information Technology (FIT), Chukyo University, 5-7 September 2007, 285-286.
 Wi-Fi Alliance (2011) Wi-Fi in Health Care: The Solution for Growing Hospital Communication Needs. http://www.wi-fi.org/featured-topics
 Park, M.H., Kim, W.H., Lee, S.J. and Kim, H.C. (2012) GPS-Tag for Indoor Location Information and Additional User Information Providing. Proceedings of 14th International Conference on Advanced Communication Technology, PyeongChang, 19-22 Feburary 2012, 894-897.
 Wong, K.S., Ng, W.L., Chong, J.H., Ng, C.K., Sali, A. and Noordin, N.K. (2009) GPS Based Child Care System Using RSSI Technique. Proceedings of IEEE 9th Malaysia International Conference on Communications, Kuala Lumpur, 15-17 December 2009, 899-904.
 Jung, J., Ha, K., Lee, J., Kim, Y. and Kim, D. (2009) Wireless Body Area Network in a Ubiquitous Healthcare System for Physiological Signal Monitoring and Health Consulting. International Journal of Signal Processing, Image Processing and Pattern Recognition, Vol., 47-54.
 Kikuchi, A., Nakane, H. and Tsushima, H. (2011) Preliminary Study of Distance Needed to Achieve Constant Walking Speed and Step Length by Young Healthy Persons. Rigakuryoho Kagaku, 26, 647-650. http://dx.doi.org/10.1589/rika.26.647
 Hayes, T.L., Hagler, S., Austin, D., Kaye, J. and Pavel M. (2009) Unobtrusive Assessment of Walking Speed in the Home Using Inexpensive PIR Sensors. Proceedings of Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Minneapolis, 3-6 September 2009, 7248-7251. http://dx.doi.org/10.1109/iembs.2009.5334746
 Vathsangam, H., Emken, A., Spruijt-Metz, D. and Sukhatme, G.S. (2010) Toward Free-Living Walking Speed Estimation Using Gaussian Process-Based Regression with On-Body Accelerometers and Gyroscopes. Proceedings of 4th International Conference on-NO PERMISSIONS Pervasive Computing Technologies for Healthcare (PervasiveHealth), Munich, 22-25 March 2010, 1-8.
 Rec. ITU-R P.1238-6 (2009) Propagation Data and Prediction Methods for the Planning of Indoor Radio Communication Systems and Radio Local Area Networks in the Frequency Range 900 MHz to 100 GHz. ITU-R Recommendations.
 Hiraguri, T., Takase, H., Sugishita, T., Kimura, T., Aoyagi, M. and Nishimori, K. (2012) ZigBee-Based Scheme for Location Information and Data Transmission. IEICE Communications Express, 1, 72-77. http://dx.doi.org/10.1587/comex.1.72