Recent posts under tag mac

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5g ssb numerology spec reference

posted May 2, 2021 by Pdk

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Why repetition coding is used in UCI format only in NR?

posted Oct 20, 2020 by Himani

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How Does 5G CN handles multiple QOS flow in single PDU Session?

posted Oct 15, 2020 by Akhilesh

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Does UE starts Inactivity timer if it receives UL grant with NDI not toggled?

posted Sep 15, 2020 by Ankit Mishra

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RACH initiation in 5g NR

posted Aug 19, 2020 by Sudhanshu Kumar Srivastav

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What is Spurious emission in UE transmission?

posted Aug 19, 2020 by Charan Shah

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What is the use of TB scaling in PDCCH message?

posted Aug 18, 2020 by Dheerendra

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What if eNB sends grants on SPS RNTI after UE sends MAC CRNTI CE in MSG3?

posted Aug 14, 2020 by Jaganathan

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What will be the DRX state after RACH if UE initiates Rach for TA expiry?

posted Aug 11, 2020 by Sakshi Rai

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Can we reserve the Preamble for Timing advance Rach request?

posted Aug 10, 2020 by Karan Patel

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What is the difference betwee FD-MIMO and MIMO?

posted Aug 7, 2020 by Karan Patel

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How Long UE can stay in DRX On after sending SR request ?

posted Aug 5, 2020 by Sakshi Rai

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How many periodic NZP CSI-RS resources can be configured per slot in NR?

posted Aug 2, 2020 by Ankit Mishra

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What is constellation mapping in Modulation order?

posted Jul 28, 2020 by Dheerendra

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Does timing advance is applicable for SRS?

posted Jul 20, 2020 by Himani

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What if UE's supported Number of Layer in DL is less than eNB supported MIMO layer in DL?

posted Jul 14, 2020 by Jaganathan

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How UE gets Number of layers and Antenna in gNB

posted Jun 15, 2020 by Bharat Kumar

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What is the use of SP CSI-RS / CSI-IM Resource Set Activation/Deactivation MAC CE?

posted Jun 11, 2020 by Bharat Kumar

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What is CBG (Code Block Group) based HARQ Re-Transmission?

posted Jun 8, 2020 by Jaganathan

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What is the reason for fall back to default BWP after inactive timer expiry?

posted May 25, 2020 by Jaganathan

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How to change Pcell to Scell and Scell to Pcell during Inactive mode mobility?

posted May 19, 2020 by Poonam

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Should Scell and Pcell have same SFN/RFN? What will be the impact of both are different?

posted May 19, 2020 by Dheerendra

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'What if UE misses the UL SPS release DCI and keeps sending the UL SPS data?

posted May 17, 2020 by Dheerendra

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Is there any limit on Max BSR transmission? if eNB doesn't give grant to BSR then what happens?

posted May 14, 2020 by Himani

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What will be the impact on system if multiple UE initiating different preamble RACH in same SF again and again?

posted May 13, 2020 by Karan Patel

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What will be the RNTI value in RAR for Contention free HO RACH?

posted May 13, 2020 by Karan Patel

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Can we disable SPS Implicit release in UL?

posted May 11, 2020 by Himani

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What if Reestablishment triggered before Security context in Soruce cell?

posted May 11, 2020 by Jaganathan

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How long UE can hold to send Reestablishment request ?

posted May 11, 2020 by Jaganathan

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Any Prohibit condition for UE to block PHR MAC CE?

posted May 8, 2020 by Bharat Kumar

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What is the UE behavior if SR Rach is fails?

posted May 4, 2020 by Sakshi Rai

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What happens if PDCCH Order fails? Will UE resume using normal connection request or Reestablishment Request?

posted May 4, 2020 by Sakshi Rai

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What is the impact if RARNTI and CRNTI is same for different UE?

posted May 2, 2020 by Jaganathan

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Can we configure DRX ON duration and inactivity timer as same value?What will be the impact?

posted Apr 14, 2020 by Jaganathan

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What happens During CDRX eNB receive NACK but UE sent ACK?

posted Apr 7, 2020 by Jaganathan

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What should be the max HARQ transmission If TTI bundling is enabled?

posted Apr 3, 2020 by Jaganathan

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What happens If UE Is in DRX OFF duration and DRX Re transmission timer is running?

posted Mar 31, 2020 by Akhilesh

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Does UE send the non SPS LC data in SPS grant?

posted Feb 27, 2020 by Sakshi Rai

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Can we support NSA with LTE UL only?

posted Feb 24, 2020 by Jaganathan

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What is the use of nomPDSCH-RS-EPRE-Offset in CQI configuration?

posted Feb 18, 2020 by Rohit Verma

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What is the use of N_cce in HARQ resource calculation?Does this required in PUCCH Format 3?

posted Feb 17, 2020 by Rohit Verma

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Does UE supports different TM mode in Scells ?

posted Feb 14, 2020 by Dheerendra

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What happens if Rel-10 UE fails to decode the PDCCH of Scell?

posted Feb 13, 2020 by Dheerendra

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If DRX and SPS are activated together , Then How To Reactivate the SPS configuration middle of DRX?

posted Feb 12, 2020 by Himani

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Does ENB forwards the packet during RLF?

posted Feb 6, 2020 by Ankit Mishra

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How contention resolution happens during RLF procedure?

posted Jan 29, 2020 by Jaganathan

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Which RNTI eNB uses while sending reestablishment/reject during RLF?

posted Jan 27, 2020 by Jaganathan

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How Re transmission are handled in TTI bundling?

posted Jan 24, 2020 by Dheerendra

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Can we skip one DL scheduling in configured grant?

posted Jan 6, 2020 by Himani

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What if UE receives Dynamic scheduling middle of SPS?

posted Jan 3, 2020 by Jaganathan