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Optimization of geographical data in location-based services
2003 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

As the usage of mobile telephones increased at the end of the nineties the development of Location-based services took off. There are a number of location-based services (LBS-services) on the market today. Positioning within the trucking business, positioning of emergency calls and commercial services like shopping offers when the user is close to a supermarket are examples of LBS. This master thesis is focused in a service of positioning called FriendFinder distributed by Telia and developed by mobilePosition. FriendFinder is a service that locates other mobile telephones within the GSM-net. The goal of this master thesis is to investigate the possibilities of improving the accuracy of the estimated location in services like FriendFinder. An example of improvement is to compare data sent from the operator with different types of geodata. Adjustments in the present application were made, that makes the estimated position of the cellular telephone from a point to an area. To be able to test the new application and to compare it with the present application, a drive survey was made to collect data. The application was then tested with a stress test, which shows the effect in time between the request and the replay. Calculations of accuracy were made. The distance between the positioned mobile phone and the base transceiver station was compared with the distance between the mobile phone and the gravity center of an area where the phone probable is located. The best solution in urban environment, where the base transceiver stations, BTS, are placed close to each other, is to generalize the estimated location to the position if the BTS. Today FriendFinder doesn’t have a satisfying estimated location in urban environment. In suburban and rural environment, the accuracy of the estimated location is acceptable. There is an opportunity for mobilePosition to do a further research of comparing the location in form of areas with the area-made geodata. In all types of areas, the stress tests worked and took reasonable time on the servers. While the recommendation is a simple solution, it can’t be that expensive either to conduct it.

Place, publisher, year, edition, pages
2003.
Keyword [en]
Technology, GIS, mobil positionering
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-46295ISRN: LTU-EX--03/214--SELocal ID: 3efc9d79-277f-4572-a4bc-188a1c0a7bddOAI: oai:DiVA.org:ltu-46295DiVA: diva2:1019609
Subject / course
Student thesis, at least 30 credits
Educational program
Environmental Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf