Analysis and Testing of LTE Voice Solutions
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LTE puheratkaisujen analyysi ja testaaminen
The goal of this thesis is to assess the long term evolution (LTE) voice solutions and to analyse the performance testing and measurement results. The main focus is on circuit switched fallback (CSFB) and single voice call continuity (SRVCC). Thesis is divided into two parts, a literature study and the performance testing results. The theoretical approach is been supplemented by the real measurement results. This gives a more dimensional view for the theoretical part. The CSFB measurements are based on interoperability tests executed by Microsoft Mobile Oy and published measurement results from Qualcomm. The SRVCC results are based on published measurements from Ericsson. The measurement results show that with LTE it is possible to gain similar service level as with current legacy network. Especially it is expected that with new enhancements performance figures will improve. Important is to maintain at least the same service level for subscriber as what they currently have. Even though it is essential to do testing in lab environment to gain information how UE and networks are working together. Still the real results are received by measuring the live networks. There are already recommendations available for how to optimize for example network configuration to decrease the CSFB call setup delay. The study indicates the significant changes that are ongoing and will come in mobile telecommunication. It describes the LTE voice solution techniques and features that are used to handle the call continuity when user equipment (UE) is moving between 2G/3G and LTE networks. It outlines the importance of usability and importance of nationwide common rules as standards.