Graduate School and Research Center in Digital Sciences

Seminar: Analyzing X2 handover in LTE/LTE-A

Konstantinos ALEXANDRIS - PhD Student

Communication systems

Date: May 4, 2016

Location: Eurecom - Salle Shannon

Abstract: Handover procedure in LTE/LTE-A has been radically evolved when compared to the previous 3GPP standards. In particular, X2 handover is introduced to allow neighboring eNBs to handle the user mobility without the involvement of the core network. While most of the application could considerably benefit from the X2 handover performance improvement, delay breakdown and impact of parameters from the UE perspective are not well investigated. This paper analyzes the performance of the X2 handover from the UE perspective. Furthermore, the impact of the different parameters on the handover decision algorithm is investigated. Preliminary results, obtained from the OpenAirInterface LTE/LTE-A emulation platform, demonstrate that main delay bottleneck resides in the uplink synchronization of the UE to the target eNB. Bio: Konstantinos Alexandris received his Diploma and M.Sc. degrees in Electronic and Computer Engineering with distinction from the Technical University of Crete, Greece, in 2012 and 2014, respectively. He worked at the Telecommunications Circuit Laboratory (TCL) of Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland, as a Research Assistant for 8 months. He is currently a PhD candidate in the Mobile Communications Department at EURECOM, France. His research interests lie in the areas of software-defined networking, wireless cellular networks, wireless communications and software-defined radio implementations. In parallel with his research, he is currently working on Eurecom’s experimental software radio platform, OpenAirInterface (OAI). He has received fellowship awards for his undergraduate studies and he was the recipient of the 2012-2013 best Diploma Thesis Award on ?Advanced Wireless Systems,? presented by the IEEE Vehicular Technology Society (VTS) and Aerospace & Electronic Systems Society (AESS) joint Greece Chapter. At the end of 2015, he was awarded as exemplary reviewer for IEEE Wireless Communications Letters.

Analyzing X2 handover in LTE/LTE-A