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Title:MOBILNA APLIKACIJA ZA LOCIRANJE V PROSTORU NA OPERACIJSKEM SISTEMU ANDROID
Authors:ID Kete, Nejc (Author)
ID Holobar, Aleš (Mentor) More about this mentor... New window
Files:.pdf MAG_Kete_Nejc_2015.pdf (4,25 MB)
MD5: 1FC832D1CBDAA8EBF4E4898887AC99BF
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:V magistrski nalogi smo preučili načine lociranja pametnih mobilnih naprav znotraj prostora. V ta namen smo implementirali sistem, sestavljen iz vstopnih točk, lokalnega strežnika, spletne in mobilne aplikacije, ki teče na operacijskem sistemu android. Zanimala nas je učinkovitost in natančnost lociranja znotraj prostora z uporabo pristopa logaritemske razdalje. Analizirali smo natančnost in robustnost sistema pri različnih jakostnih omrežnega signala, pri izpadu ene od vstopnih točk ter med gibanjem po prostoru. Prav tako smo iskali povezavo med nihanjem zaznane moči signala ter natančnostjo ocenjene lokacije. Naš algoritem temelji na umerjanju prostora z merjenjem jakosti mrežnega signala v referenčnih točkah. V prostoru v velikosti 137 m2 z vsaj 15 referenčnimi točkami, porazdeljenimi tako, da pokrijejo celoten spekter moči signala in vsaj tremi vstopnimi točkami mobilnega omrežja, je naš algoritem lokacijo določil s povprečno napako  2,5 m. V prostoru z manj referenčnimi točkami ali samo dvema vstopnima točkama je povprečna napaka zaznave lokacije narasla na  5 m ali več. Meritve so med drugim tudi pokazale, da je naš sistem manj primeren za uporabo med gibanjem uporabnika.
Keywords:lociranje v prostoru, trilateracija, Standard IEEE 802.11, brezžično omrežje, logaritemska razdalja, mobilna aplikacija, operacijski sistem android
Place of publishing:[Maribor
Publisher:N. Kete
Year of publishing:2015
PID:20.500.12556/DKUM-55310 New window
UDC:[654.15:621.395.721.5]:528.35(043.2)
COBISS.SI-ID:19272470 New window
NUK URN:URN:SI:UM:DK:KWWS6APL
Publication date in DKUM:27.10.2015
Views:1753
Downloads:198
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
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Secondary language

Language:English
Title:MOBILE APPLICATION FOR INDOOR LOCATION ON ANDROID OPERATING SYSTEM
Abstract:In this work we studied indoor location techniques for smart phone devices. Our solution is composed of access points, local network server, web and android application. Focus of our study was on the effectiveness and accuracy of indoor location estimation by using log-distance model. We analysed accuracy and robustness of the system at various levels of signal strength, using only two access points at different fixed positions and while moving. We also analysed the connection between signal strength variations and accuracy of location estimations. Our algorithm is based on space calibration by using reference points. In a space with size of 137 m2 with at least 15 reference points, spread out across the entire signal strength spectrum, and at least 3 access points, our algorithm produced location estimates with an average error of  2.5 m. In a space with less reference points or just two access points, the average error of location estimation increased to  5 m or more. Our analysis also showed that our approach is insufficiently accurate when the user is moving.
Keywords:indoor location, trilateration, IEEE 802.11 standard, Wi-Fi, log-distance model, android operating system, mobile devices


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