LTE Theory to Practice- KPI Optimization (A 4G Wireless Technology)
Damini Rai1, Abhishek Dwivedi2

1Damini Rai, M. Tech Research Scholar, Department of Information Technology, Lakshmi Narain College of Technology and RGPV University, Bhopal (M.P), India.
2Abhishek Dwivedi, Assistant Professor, Department of Information Technology, Lakshmi Narain College of Technology and RGPV University, Bhopal (M.P), India.
Manuscript received on 12 December 2018 | Revised Manuscript received on 23 December 2018 | Manuscript published on 30 December 2018 | PP: 1-20 | Volume-8 Issue-2, December 2018 | Retrieval Number: B2534128218/18©BEIESP
Open Access | Editorial and Publishing Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (

Abstract: LTE is the most competitive radio technology nowadays and in coming years by offering high-data-rates with low-latency, improving services, lowering the costs and allowing for spectrum refarming thanks to the frequency and bandwidth flexibility. LTE evolution is going over LTE-A features towards 5G direction. One of the reasons for the success of LTE is that operators are actively driving the LTE standard through the NGMN (Next Generation Mobile Networks) – and through 3GPP as well- . On Jan 2016, there were 480 commercial LTE networks launched worldwide (Source The deployment are accompanied by LTE-A features and several VoLTE deployments. As shown in Figure 1 the migration paths for existing mobile operators are multiple which facilitates the success of the technology. Certainly. LTE brings new technologies like Multiple Input Multiple Output (MIMO) transmission, multiband carrier aggregation, small cells and a number of new uses cases like Voice over LTE (VoLTE). The optimization of Key Performance Indicators (KPI) is still important in LTE including setup success rates, handover success rates and call retainability. LTE uses frequency reuse one without any soft handover which makes the interference management more challenging than in legacy radio networks. Signalling message coding and packet scheduling are example solutions in LTE optimization together with the traditional RF optimization. Voice has been Circuit Switched in 2G and in 3G networks while voice in LTE is VoIP (VoLTE). A number of optimization steps are required to provide similar or better drop rates with VoLTE as with CS voice. Also the handover from VoIP to CS voice requires optimization. That is called Single Radio Voice Call Continuity (SRVCC). LTE will be running in parallel with 2G and 3G network. The interworking between these radios need to be considered as well as the usage of multiple LTE bands.  
Keyword: LTE, VoLTE, (SRVCC), LTE Brings New Technologies like Multiple Input Multiple Output (MIMO) Transmission,
Scope of the Article: MIMO Antenna