Browse > Article
http://dx.doi.org/10.7737/KMSR.2012.29.2.079

Optimal Fingerprint Data Filtering Model for Location Based Services  

Jung, Jun (아주대학교 산업공학과)
Kim, Jae-Hoon (아주대학교 산업공학과)
Publication Information
Korean Management Science Review / v.29, no.2, 2012 , pp. 79-90 More about this Journal
Abstract
Focusing on the rapid market penetration of smart phones, the importance of LBS (Location Based Service) is drastically increased. However, traditional GPS method has critical weakness caused by limited availability, such as indoor environment. WPS is newly attractive method as a widely applicable positioning method. In WPS, RSSI (Received Signal Strength Indication) data of all Wi-Fi APs (Access Point) are measured and stored into a huge database. The stored RSSI data in database make single radio fingerprint map. By the radio fingerprint map, we can estimate the actual position of target point. The essential factor of radio fingerprint database is data integrity of RSSI. Because of millions of APs in urban area, RSSI measurement data are seriously contaminated. Therefore, we present the unified filtering method for RSSI measurement data. As the results of filtering, we can show the effectiveness of suggested method in practical positioning system of mobile operator.
Keywords
LBS; WPS; Filtering; KNN;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Skyhook Wireless, "Location beacon database and server, method of building location beacon database, and location based service using same," World Intellectual Property Organization, 2004.
2 Skyhook Wireless, "Skyhook Wireless technology used in revolutionary iPhone and iPod touch," http://www.skyhookwireless.com/press/skyhookapple.php, 2008.
3 Watters, J.M., "Combining GPS with TOA/ TDOA of cellular signals to locate terminal," US Patent, 1998.
4 Welch, G. and G. Bishop, "An introduction to the Kalman Filter," 2006.
5 임재걸, 정승환, "지문방식 측위 기반 칼만필터 추적의 정확성 제고 방법", 한국정보과학회, 제34권, 제2호(B)(2007).
6 Javier del Prado Pavon, "Link adaptation strategy for IEEE 802.11 WLAN via Received Signal Strength measurement," Wire less Communication and Networking, 2003.
7 Li, B., J. Salter, A.G. Dempster, C. Rizos, "Indoor positioning techniques based on Wireless LAN," 2006 Auswireless Conference, 2007.
8 Masumoto, Y., "Global Positioning System," US Patent, 1993.
9 Kaemarungsi, K., "Design of indoor positioning systems based on location fingerprinting technique," University of Pittsburgh, 2005.
10 Kaemarungsi, K. and P. Krishnamurthy, "Properties of indoor received signal strength for WLAN location fingerprinting," Mobile and Ubiquitous Systems：Networking and Services, 2004.
11 Skyhook Wireless, "Estimation of positioning using WLAN access point radio propagation characteristics in a WLAN Positioning System," World Intellectual Property Organization, 2007