Bluetooth Positioning
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This document discusses Bluetooth positioning and the challenges involved. It introduces Bluetooth, noting its frequency range and device classes with different ranges. It explores using received signal strength indication (RSSI) values to calculate distance, but notes RSSI can vary between devices and be unstable even for one device. Platform and language challenges are discussed, with Android chosen. Architectures and class diagrams are included, along with references.
Bluetooth Positioning
- 2. Introduction open platform specification for a radio frequency communication protocol for wireless devices. 2400 - 2483.5 MHz frequency range There are three classes of Bluetooth devices: Class 1 :33 m Class 2 :10 m Class 3 :3 m
- 7. Challenges – distance calculation from rssi Theoretical Relation Between Distance and RSSI: 1- 2-
- 8. Challenges – distance calculation from rssi Depends on device… Unstable for 1 device… Better result after pairing… -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 1 2 3 4 5 6 7 8 9 10 Bluetooth Distance/RSSI Xperia TX Nokia6270
- 9. Challenges – Platform & Language 1- Windows Platform Problem (HCI layer) 2- Linux need to install bluz package using command: Sudo apt-get install bluz Language Test (.Net (32feet), Java (bluecove), android) We choose android!!!
- 11. Class diagram
- 12. References Atlantis: Location Based Services with Bluetooth, Jason Yipin Ye , Department of Computer Science, Brown University The Official Bluetooth Membership site: https://www.Bluetooth.org http://www.stackoverflow.com/questions/13705647/fin ding-distance-from-rssi-value-of-bluetooth-low- energy-enabled-device http://www.codeproject.com/Articles/783073/A- Simple-Android-SQLite-Example http://www.mkyong.com/android/android-activity- from-one-screen-to-another-screen/
- 13. thanks…