Interview Imp Topics:-
1. LTE and NR Cell Acquisition, Attach Procedure and ENDC Call Flow.
2. PLMN/Cell Selection ,PAGING, Cell Reselection (TAC/NAU) , CSFB, SRVCC, VoLTE (IDLE & Connected Mode) , CCO , Cell Redirection, HO Types, S1 and X2 HO and Issues (HO Events),Reestablishment Procedure , RLF , SR, Measurement/Measurement gap, Reconfiguration ANR/SON, RRC Timers.
3. MAC - RACH, HARQ, Power Control, TA ,MAC CE (L2-MAC), CSI, BSR, DRX & CDRX, UE Power Headroom.
4. MIMO , Beamforming , Massive MIMO , Throughput Testing and Peak throughput and CA (PCC,SCC) , 4*4 .
5. Basic Fundamental of LTE and NR :
Architecture, UE and Network Identities , MIB, SIB ,PUCCH Format, PDCCH Format , DCI Format
Channel Mapping ,Interfaces and Protocol Stack , SRB , DRB , QCI(9 & 22) , RRC States
Frame Structure , Search Space/ Aggregation Level.
6 . Difference in Layer Functionality of LTE and NR
7. IMS Call flow
8. 5G lab setup
9. Open RAN concept
No comments: