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Q & A

LTE Q & A (01/11/2020)

1.Is it possible to trigger re-establishment procedure without RACH procedure?A.YESB.NO2. In which channel we get the DCI InfoA. PDSCHB. DLSCHC. PDCCHD. PBCH3. For Paging in LTE which protocol is responsibleA. DiameterB. SCTPC. S1APD. GTP4. DNS in LTE network help MME to selectA. MSCB. PCRFC. SGW/PGWD. HSS5. For Control Plane which type of security is appliedA. CipheringB. IntegrityC. Integrity and CipheringD. None

Admin

August 08, 2021

20 Min Read

Q & A

LTE Q & A (21/10/2020)

1.Components of TAITAC,MNCTAC,MCCMNC,TAC,MCCTAC,MNCAns. MNC,TAC,MCC2. ERAB Consist ofS1 and S5/S8 BearerRadio and S5/S8 BearerRadio and S1 BearerS1, Radio and S5/S8 BearerAns. Radio and S1 Bearer3. Default bearer usesNon-GBRGBRBothAns. Non-GBR4. Which one is not a SIB2 parameterPrach-configPowerRampingStepRach-ConfigCommonq_RxLevMinOffsetAns. q_RxLevMinOffset5. TRACKING AREA UPDATING (TAU) procedure is always initiated byUEPGWMMEEnbUE or MMEAns. MME

Admin

August 08, 2021

20 Min Read

Q & A

5G-NR Q&A (20/10/2020)

1. In 5G-NR Extended Cyclic Prefix (CP) is supported in which subcarrier spacing15 kHz60 kHz120 kHz240 kHzAns. 60 kHz2. In 5G-NR when we are using numerology-2 what would be the Slot length?0.25 ms0.5 ms0.125 ms1 msAns. 0.25 ms3.Which RS in not in 5G NRDMRSSRS & CRSSRSCRSAns. CRS4.What is CUPS in 5G?Controlling user plane separationControl and user plane separationControl and user plane SegmentationControlling user plane SegmentationAns . Control and user plane separation5. In 5G-NR SRB0 uses the channel?PBCHDCCHBCCHCCCHAns. CCCH

Admin

August 08, 2021

20 Min Read

Q & A

5G-NR Q&A (15/10/2020)

1.In 5G, UE in RRC IDLE cannot move to RRC INACTIVEFALSETRUEAns. TRUE2. 5G-S-TMSI is allocated bySMFAMFUPFAUSFAns. AMF3. What does CSI consist of in 5G-NRCQI,RI,PMILI,CRISSBRI,CQI,RI,PMI,LI,CRICQI,LI,RI,PMIAns. SSBRI,CQI,RI,PMI,LI,CRI4.TPC RNTI  in 5G-NR is used forReception of pagingFscrambling of msg3Uplink power control purposeRACHAns. Uplink power control purpose5.In 5G-NR SRB 0 is only applicable to theSecondary nodePrimary NodeMMEAns. Primary Node

Admin

August 08, 2021

20 Min Read

Q & A

LTE Q & A (15/10/2020)

1.S-TMSI is Combination ofMME Code & M-TMSIMME Groupid & M-TMSIMME Groupid & MME CodeNone of the aboveAns. MME Code & M-TMSI2.What is the Range of SFN in LTE?641285121024Ans.10243.RRC Connection Reconfiguration uses which Signaling Radio BearerSRB1SRB0SRB0 & SRB1SRB2Ans.SRB14.Massive MIMO widely using forTDDFDDBoth TDD & FDDAns. TDD5.ESM information request goes fromMME to UEMME to EnbUE to MMEMME to PGWAns. MME to UE

Admin

August 08, 2021

20 Min Read

Q & A

5G-NR Q&A (15/10/2020)

1.In 5G, UE in RRC IDLE cannot move to RRC INACTIVEFALSETRUEAns. TRUE2. 5G-S-TMSI is allocated bySMFAMFUPFAUSFAns. AMF3. What does CSI consist of in 5G-NRCQI,RI,PMILI,CRISSBRI,CQI,RI,PMI,LI,CRICQI,LI,RI,PMIAns. SSBRI,CQI,RI,PMI,LI,CRI4.TPC RNTI  in 5G-NR is used forReception of pagingFscrambling of msg3Uplink power control purposeRACHAns. Uplink power control purpose5.In 5G-NR SRB 0 is only applicable to theSecondary nodePrimary NodeMMEAns. Primary Node

Admin

August 07, 2021

20 Min Read

Q & A

LTE Q & A (15/10/2020)

1.S-TMSI is Combination ofMME Code & M-TMSIMME Groupid & M-TMSIMME Groupid & MME CodeNone of the aboveAns. MME Code & M-TMSI2.What is the Range of SFN in LTE?641285121024Ans.10243.RRC Connection Reconfiguration uses which Signaling Radio BearerSRB1SRB0SRB0 & SRB1SRB2Ans.SRB14.Massive MIMO widely using forTDDFDDBoth TDD & FDDAns. TDD5.ESM information request goes fromMME to UEMME to EnbUE to MMEMME to PGWAns. MME to UE

Admin

August 07, 2021

20 Min Read

Q & A

LTE Q & A (01/11/2020)

1.Is it possible to trigger re-establishment procedure without RACH procedure?A.YESB.NO2. In which channel we get the DCI InfoA. PDSCHB. DLSCHC. PDCCHD. PBCH3. For Paging in LTE which protocol is responsibleA. DiameterB. SCTPC. S1APD. GTP4. DNS in LTE network help MME to selectA. MSCB. PCRFC. SGW/PGWD. HSS5. For Control Plane which type of security is appliedA. CipheringB. IntegrityC. Integrity and CipheringD. None

Admin

August 07, 2021

20 Min Read

Q & A

LTE Q & A (13/11/2020)

Until the UE is paged and bearers are setup which node is responsible to buffer the packets for the mean time in LTE?A. PGWB. PCRFC. SGWD. Visited PCRFWhere is PCEF situated?OCSUDRPDN GWDRAIn LTE Authentication process, Upto Authentication response which kind of security done?IntegrityCipheringTill Authentication response no security got setupIntegrity and CipheringIn RACH T300 timer start at which msgMSG 2MSG 3MSG 4MSG 5In authentication process, the master key ‘ K ‘ is stored inMME and UEUE and SIMSIM and HSSUE and HSS

Admin

August 07, 2021

20 Min Read

Q & A

LTE Q & A (14/11/2020)

1.    How Many S1AP ID Is Created In Initial Attach Procedure Of LTE? A.   OneB.   TwoC.   ThreeD.   Depends On Resource Availability  2.    Volte Supported UE At The Time Of Emergency Call Will Create. A.    Will Not Use Any PDNB.   A New PDN ConnectionC.   Will Use PDN That Network AllowD.   Will Use Old PDN 3.    In HARQ What The Max Number Of MAC PDU Retransmission Is A.   8B.   2C.   4D.   Depend On Data Length 4.    If UE Is In Idle State And Need To Attach And Move Into Connected State. In That Scenario While Sending Attach Request UE Will Get Attach Through A.   STMSIB.   MTMSIC.   IMSID.   MSISDN  5.    Logical Channel Prioritization In MAC Is Done Where And In Which Direction A.   UE-UplinkB.   UE-DownlinkC.   E-NB UplinkD.   E-NB Downlink

Admin

August 07, 2021

20 Min Read