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Voice check
2001 (English)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

When testing mobile phone systems and especially when doing end-to-end testing, a central test is to check if a conversation is up between two mobiles. One way to do it is to ask the system if a connection is up between the mobiles. But the system can be wrong, so the end-to-end connection has to be verified in some other way. The most secure way to know if a connection is up is to check on the mobiles themselves if they really are connected. Then we can know for sure that a connection exists. Technology: The solution is to send “speech” through the microphone on one mobile and then listen on the speaker on the other, e.g. by sending DTMF signalling between the mobiles. An extension could be to do some kind of quality measuring of the “speech”. So called computer services could be implemented too. The exam work will contain some hardware to connect physically to the mobiles, but not very advanced, the larger part will be software. Our proposal is to build the solution with a Linux based computer with a multichannel soundcard for sending and receiving the signals. All verifying is to be done in software. The data generated from this verification shall be made available, via a serial interface, to other applications for analysis. A part of the exam work is placed on an investigation of whether this is a good method to solve the problem. The rest of the work is placed on implementation of chosen solution.

Place, publisher, year, edition, pages
Keyword [en]
Technology, Linux, sound, gsm, mobile, multichannel connection
Keyword [sv]
URN: urn:nbn:se:ltu:diva-57255ISRN: LTU-HIP-EX--01/53--SELocal ID: df07fcb2-0c96-4dd8-9659-fcdaf8c78ad3OAI: diva2:1030642
Subject / course
Student thesis, at least 15 credits
Educational program
Computer Engineering, bachelor's level
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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