Most viewed questions under tag mac

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0 answers

what is the HARQ process ID used for MSG3 transmission ?

posted Oct 11, 2018 by Jaganathan

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1 answer

How UE will calculate channel quality indicator ?

posted Apr 21, 2017 by Himani

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1 answer

contention free preambles lies under which preamble group ?

posted Mar 19, 2018 by Himani

+2 votes

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Why in RLC layer Seq. numbering is given to RLC SDU's and not to RLC PDU's?

posted Sep 21, 2018 by Mayur Jivanrao Nakade

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Is there any UL scheduler available at UE side ?

posted Apr 26, 2017 by Poonam

+1 vote

1 answer

How UE gets to know TDD/FDD configuration while initial sync with the network?

posted Apr 20, 2018 by Himani

+2 votes

1 answer

I want to get the list of mounted volumes on mac using c++

posted Sep 3, 2013 by Ovinod Nair

+1 vote

2 answers

What is the RACH PRB size for the NR cell ?Is it same as LTE?Is so what is the sub carrier spacing?

posted Mar 13, 2019 by Himani

+3 votes

1 answer

Functions and services of MAC layer in LTE?

posted Mar 19, 2014 by Dilbagh

+4 votes

1 answer

LTE: What type of MCS is being used for MBMS data ?

posted Apr 17, 2014 by Harshita

+3 votes

1 answer

How MAC will schedule PCCH message with ETWS or Sys info change(for the UEs which are in IDLE)?

posted Dec 6, 2015 by Badikela Mahesh

+1 vote

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Does one PDU session has multiple DRB flow in 5G?

posted Jan 3, 2018 by Himani

+5 votes

1 answer

Why we need both MAC HARQ Re-transmission & ARQ Re-transmission?

posted Dec 9, 2013 by anonymous

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1 answer

Can UE ask recommended bit rate MAC CE from ENB? Or is in only one way?

posted Nov 7, 2018 by Jaganathan

+1 vote

1 answer

LTE: Due to which parameter or protocol layer, LTE puts restriction of having maximum 8 bearers per UE ?

posted Sep 17, 2016 by Harshita

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2 answers

How RLC differentiate received PDU is new transmission or re-transmission?

posted Apr 10, 2017 by Himani

+2 votes

1 answer

LTE: What is the significance of broadcasting system bandwidth information in master information block (MIB) ?

posted May 4, 2016 by Vikram Singh

+2 votes

3 answers

Why do we need only contention free RACH in LAA cells?

posted Apr 3, 2017 by Jaganathan

+1 vote

1 answer

How token Bucket Alogorithm is applied to the logical channels of MAC layer in LTE?

posted Oct 6, 2016 by Sneha Maganahalli

+1 vote

2 answers

In RACH how path loss effects selection of group A or group B preamble??

posted Apr 9, 2018 by Basavaraj Kamagond

+2 votes

1 answer

LTE: How many control format messages have been defined for uplink channels ?

posted Oct 10, 2016 by Vikram Singh

+2 votes

1 answer

What is the TA for RACH request message to send?

posted Jul 3, 2018 by Himani

+1 vote

2 answers

In LTE FDD MODE if uplink and downlink band width are different then how the UE will know about that ?

posted May 31, 2017 by anonymous

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2 answers

Does frequency hopping supported in NR?

posted Feb 26, 2018 by Jaganathan

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What is the usage of pdsch-AggregationFactor in NR?

posted Oct 10, 2018 by Rohit Verma

0 votes

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How to uninstall Git on a Mac?

posted Jun 5, 2014 by Deepankar Dubey

+1 vote

1 answer

Why does RLC retransmitting its PDU after MAX HARQ retx , why not after first HARQ NACK ?

posted Sep 8, 2017 by Himani

+1 vote

1 answer

LTE: How many types of headers are supported by MAC Layer in LTE network ?

posted Oct 4, 2016 by Harshita

0 votes

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

posted Jun 8, 2020 by Jaganathan

+1 vote

1 answer

UE activity in DRX On duration?

posted Sep 15, 2017 by Bharat Kumar

+1 vote

1 answer

How CQI 15 & MCS 28 will map in LTE?

posted Jul 27, 2018 by Mohit Mohan

+1 vote

1 answer

How UE gets the value of BI in lte?

posted Mar 15, 2018 by Himani

+1 vote

1 answer

LTE MBMS: How many sub frames of a radio frame are used to transmit multi/broadcast data ?

posted Aug 10, 2014 by Ganesh

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1 answer

LTE: Does the eNodeB change transmission mode per TTI for an user or it can be semi-static?

posted Sep 28, 2016 by Rupam

+1 vote

1 answer

LTE: How many types of resource allocation schemes are present in LTE ?

posted May 26, 2014 by Vikram Singh

+1 vote

1 answer

Is it mandatory to do RACH on all the cells of SENB?

posted Nov 16, 2017 by Rohit Verma

+2 votes

1 answer

LTE: When an eNodeB decide to enable TTI bundling for an UE ?

posted Nov 24, 2016 by Harshita

0 votes

1 answer

What is the duration of Each SS Block and SS burst in 5G?

posted Jan 18, 2018 by Jaganathan

0 votes

1 answer

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

0 votes

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What is the difference between single PHR and multi PHR MAC CE?

posted Jan 12, 2018 by Jaganathan

+2 votes

1 answer

Why do we need TPC command for SRS transmission in NR?

posted Mar 23, 2018 by Jaganathan

0 votes

1 answer

Why SGW is buffering UE data, however ENB PDCP buffers the data then why buffering is needed in SGW?

posted Aug 23, 2017 by Charan Shah

+2 votes

1 answer

LTE: How does eNodeB enforce uplink data rate and what eNodeB does in case when UE is not following the uplink limit ?

posted May 8, 2016 by Vikram Singh

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1 answer

Why there is a dedicated MAC process for BCH?

posted Jun 22, 2016 by Sumankumar Guniganti

0 votes

1 answer

Why Non adaptive transmission applicable only in UL?

posted Mar 19, 2019 by Himani

+5 votes

3 answers

In LTE does UE performs contension based RACH or contension free RACH for UE uplink sync?

posted Feb 17, 2017 by Prabhavathi

+5 votes

1 answer

LTE: How does UE PHY designed to work on multi mode (GSM/3G/LTE) ?

posted Nov 10, 2013 by Vimal Kumar Mishra

0 votes

1 answer

BSR reporting

posted Dec 2, 2017 by Sushant Bose

+1 vote

1 answer

How ENB decides the size of Group A and Group B?

posted Mar 12, 2019 by Himani

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1 answer

WHy HARQ re-ordering in is RLC?But HARQ functionality is done by MAC?

posted May 26, 2017 by Himani