LTE Interview Q's

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  LTE RF – Technical Interview Questions Here is list of questions you may be asked during the technical interview of LTE RF planning and optimization job.1.Tell us about LTE Frame Structure?2.What are the Bandwidths used for LTE deployment?3.How Many subcarriers/RBs are there in 5/10/20 MHz channel4.What is Subcarrier Bandwidth in LTE?5.How can we calculate LTE DL/UL throughput?6.What Maximum LTE throughput can be achieved in the field?7.How many states a UE can have ?8.What is difference between Idle & Connected Mode9.Message flow during LTE Call?10.What is RRC Reconfiguration?11.What is difference between HO , Redirection, Cell Selection / Re-Selection?12.Can you tell us about Prach/PCI/Pusch/Pucch Planning?13.What is Difference between MIB and SIB?14.Handover types in LTE15.What is difference between X2 and S1 HO?16.Explain Handover signalling messages?17.Explain Events measurements in LTE18.Which event trigger during the reselection from LTE to 3G and vice versa19.What is ANR?20.What are the types of ANR? Which one is better?  21.What is QCI?22.What is LTE modulation?AMC?23.What is MIMO?24.What is TM? TM1? TM2? TM3? TM4?25.What is close loop MIMO?26.Mapping of MIB and SIB messages?27.Explain SIB messages?28.What is purpose of SIB19?29.What Message will be observed on layer-3 During handover stage?30.Which channel carries CQI information to enodB?31.What other info PUCCH carries?32.What is DRX?33.What is UE disconnection Timer?34.What is the Location of PUCCH in the UL Spectrum?35.CS Fall back criteria and event?36.Explain CSFallback signalling?37.What basic parameters are required from Planning to configure a site?38.Explain PCI (Physical Cell id) Planning?39.How do you deal with Interference issues during PCI planning40.How do we do optimization of site?41.What are the Features available to improve accessibility, retainability?42.What is BLER? What’s Target value?43.How to investigate low throughput?44.What major KPIs have you been analyzing most?
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