Czech language  English language

Publications & Reports - Document Abstract

Jakub Doležal, Lukáš Kencl
Improving QoE of SIP-based automated voice interaction in mobile networks
8th International Conference on Network and Service Management (CNSM)
October 22-26, 2012 | Las Vegas, USA

Mobile voice-assisted services are currently experiencing strong growth. However, occasionally low real-time quality of service within mobile networks could have significant negative impact on quality of experience of users interacting with automated voice services. Latency may grow to unacceptable levels and speech recognition and synthesis might suffer. We present a methodology of mitigating such effects by monitoring the immediate connection status and adapting various parameters of the SIP communication setup (buffer size, codec) in response, thus radically improving user experience. We demonstrate practical usability by implementation and testing in a real mobile network and by performing multiple test scenarios when interacting with a state-of-the-art automated voice platform.


R&D Centre (RDC) for Mobile Applications
Dept of Telecommunications Engineering
Faculty of Electrical Engineering
Czech Technical University in Prague
Technická 2, 166 27 Prague 6
Czech Republic

Tel.: (+420) 224 355 991
Fax.: (+420) 233 335 999