Visual wireless communications with smartphones

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Di Francesco, Mario
dc.contributor.author Montoya Freire, Maria
dc.date.accessioned 2015-09-18T08:46:55Z
dc.date.available 2015-09-18T08:46:55Z
dc.date.issued 2015-08-24
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/17785
dc.description.abstract The advent of smartphones has certainly brought many advantages for communications among people. Due to their diverse features, smartphones allow to exchange information in different ways. The most widespread communication technologies for mobile devices - such as WiFi, Bluetooth and Long Term Evolution - exploit wireless transmissions based on electromagnetic radio signals. However, the use of these technologies present some issues with respect to security, coverage and interference. Recent studies have revealed new approaches for data exchange, such as visible light communication. Using an optical channel for data transmission provides interesting advantages over current technologies: the use of unlicensed spectrum, no interference with radio signal, secure communication and no need for a special infrastructure. In this thesis, we implemented an application that transfers data between smartphones through visible light communications. To this purpose, the application employs QR codes shown on the display to encode transmitted data and the front-facing camera for receiving the data. We also designed a supporting communication protocol for ensuring a successful transmission between two smartphones. Finally, we evaluated our solution in terms of power consumption and communication performance. The results showed that our solution is suitable for exchanging files of small size. en
dc.format.extent 63
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Visual wireless communications with smartphones en
dc.type G2 Pro gradu, diplomityö en
dc.contributor.school Perustieteiden korkeakoulu fi
dc.subject.keyword wireless communication en
dc.subject.keyword short-range communication en
dc.subject.keyword smartphone en
dc.subject.keyword QR codes en
dc.subject.keyword visible light communication en
dc.identifier.urn URN:NBN:fi:aalto-201509184400
dc.programme.major Mobile Computing - Services and Security fi
dc.programme.mcode SCI3045 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Di Francesco, Mario
dc.programme Master's Programme in Mobile Computing - Services and Security fi


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