Abstract
Indoor location-based services hold promise for a multitude of valuable services, but require micro-detailed geo-referencing not achievable with "outdoor" technologies such as GPS and cellular networks. A widely used technique for accurate indoor positioning is location fingerprinting which makes use of existing WLAN infrastructures. The technique consists of building a radio map of signal strength measurements which is searched to determine a position estimate. While the fingerprinting technique has produced good positioning accuracy results, the technique incurs a substantial computational burden for large buildings and is thus problematic for tracking users in real time on processor-constrained mobile devices. In this paper we present a technique for improving the computational efficiency of the fingerprinting technique such that location determination becomes tractable on a mobile device. The technique is based on a graph-modeling of the physical environment and works by restricting the search space to positions that are possible to reach from a previously estimated position. The technique is general in that it can be applied in conjunction with any positioning algorithm, and a positive side effect is that it may enhance the positioning accuracy of the system.
Original language | English |
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Title of host publication | Proceedings of the 2007 Fourth Annual International Conference on Mobile and Ubiquitous Systems: Networking&Services (MobiQuitous |
Volume | 00 |
Publisher | IEEE Computer Society Press |
Publication date | 2007 |
Pages | 1-5 |
ISBN (Print) | 978-1-4244-1024-8 |
DOIs | |
Publication status | Published - 2007 |
Event | The 4th Annual International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MOBIQUITOUS2007) - Philadelphia, United States Duration: 6 Aug 2007 → 10 Aug 2007 Conference number: 4 |
Conference
Conference | The 4th Annual International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MOBIQUITOUS2007) |
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Number | 4 |
Country/Territory | United States |
City | Philadelphia |
Period | 06/08/2007 → 10/08/2007 |