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The Position-Domain GPS/WLAN Hybrid Position in Mobile Terminal
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- Authors
- Young Su Cho, Byung Doo Kim, Seong Jo Yoon, Myung In Jee, Wan Sik Choi
- Issue Date
- 2009-11
- Citation
- International Symposium on GPS/GNSS 2009, pp.1-5
- Language
- English
- Type
- Conference Paper
- Abstract
- Nowadays LBS(location based service) has been more and more important because it is regarded as one of the killer application in mobile communication. However, the positioning accuracy and availability supported by the current location technologies is not sufficient to provide seamless LBS service to mobile users. In view of position accuracy, GPS has good accuracy in outdoor open sky environment but do not guarantee accuracy in deep urban canyon and indoor area. On the other hand, lots of indoor location technologies provide high accuracy in a limited indoor area where infrastructures are pre-installed. So in order to obtain the sufficient position accuracy in indoor and outdoor seamless area, we should decide the most accurate location technology based on reasonable criteria which can be made from raw measurements obtained in GPS and indoor location infrastructures.In view of position availability, GPS has global service coverage but has a critical demerit not to decide the position in indoor area where lots of indoor location technologies can provide it. After all, in order to provide seamless LBS, we should smoothly connect indoor with outdoor including the transition area. Especially in transition area, there is high possibility to fail to provide continuous position information. So we need some handover mechanism between available location technologies in indoor-outdoor transition area in order to increase position availability even though served position accuracy may not be sufficiently high.In this paper, firstly to achieve the stable position accuracy in indoor and outdoor seamless area regardless of user's circumstance, noble position domain GPS/WLAN hybrid positioning method will be suggested and evaluated by the experiment using mobile terminal.
- KSP Keywords
- Accurate location, Handover mechanism, High accuracy, Hybrid positioning, Location technology, Location-Based Services, Position domain, Position information, Positioning accuracy, Positioning method, Transition area