Recent posts under tag mac

0 votes

1 answer

how to decide scaling factor and duration of PHICH?

posted Apr 11, 2017 by Sakshi Rai

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

posted Apr 10, 2017 by Himani

+2 votes

3 answers

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

posted Apr 3, 2017 by Jaganathan

+1 vote

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LTE: Why padding is required in MAC layer.

posted Mar 24, 2017 by Rohit Verma

+1 vote

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LTE: How UE will detect Paging message when UE in IDLE mode

posted Mar 24, 2017 by Rohit Verma

+1 vote

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How many times UE can ask SR for uplink grant is there any limit for SR for uplink grant?

posted Mar 21, 2017 by Karan Patel

+1 vote

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In downlink, does RLC forms different PDUs for each UE scheduled to receive data this TTI or just a single PDU?

posted Feb 20, 2017 by Mayank Gupta

+5 votes

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

posted Feb 17, 2017 by Prabhavathi

+1 vote

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LTE: Scheduling of mac grant

posted Jan 23, 2017 by anonymous

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What is the difference between persistent scheduling and semi persistent scheduling?

posted Dec 14, 2016 by Gnanendra Reddy

+3 votes

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How harq feedback is considred by eNB in measurement-gap?

posted Dec 6, 2016 by Sneha Maganahalli

+1 vote

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What is the difference between On duration timer and inactivity timer?when UE will start these timers?

posted Nov 28, 2016 by Gnanendra Reddy

+1 vote

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LTE: What is the use of PHR in LTE MAC ?

posted Nov 27, 2016 by Ganesh Kumar

+1 vote

1 answer

LTE: What all parameters are considered by an eNodeB to allocate the PUSCH resources for an UE ?

posted Nov 26, 2016 by Ganesh Kumar

+2 votes

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

posted Nov 24, 2016 by Harshita

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LTE: Does the MAC perform dynamic scheduling for MBMS data or it is persistent throughout the MBMS session duration ?

posted Nov 18, 2016 by Rupam

+2 votes

1 answer

LTE: Which modulation and coding schemes are used for data transmission of MTCH ?

posted Nov 2, 2016 by Rupam

+1 vote

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LTE: What things need to be implemented in LTE MAC layer to make it MBMS capable ?

posted Oct 24, 2016 by Rupam

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LTE: What all MCS indexes can be used for the configuration of PMCH ?

posted Oct 22, 2016 by Rupam

+1 vote

2 answers

LTE: Does the eNodeB schedule data for an UE in a particular sub frame allocated for the MBMS data transmission ?

posted Oct 22, 2016 by Rupam

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what is the Handle field sent in UE_CONFIG.request() from L2/L3 software to L1-PHY

posted Oct 14, 2016 by Sneha Maganahalli

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what is DwPTS and UpPTS in TDD? Why is the name so?what is carried in them? Why there are 2 switch points 5ms and 10ms?

posted Oct 14, 2016 by Sneha Maganahalli

+1 vote

3 answers

what is MBSFN feature in LTE?

posted Oct 14, 2016 by Sneha Maganahalli

+3 votes

1 answer

LTE: Does the eNodeB inform UE to use a specific MCS for the allocated resource in PUSCH ?

posted Oct 13, 2016 by Harshita

+2 votes

1 answer

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

posted Oct 10, 2016 by Vikram Singh

0 votes

1 answer

LTE: Why LTE works at the granularity of 1 ms (sub frame level) not at the slot level i.e 0.5 ms ?

posted Oct 8, 2016 by Vikram Singh

+1 vote

1 answer

When UE will use Adaptive retransmission and non-adaptive retransmission in LTE MAC Layer?

posted Oct 6, 2016 by Sneha Maganahalli

+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

+2 votes

1 answer

LTE: What F bit field signify in MAC sub header ?

posted Oct 4, 2016 by Vikram Singh

+1 vote

1 answer

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

posted Oct 4, 2016 by Harshita

+1 vote

1 answer

LTE: What are the functions performed by MAC layer in LTE ?

posted Oct 1, 2016 by Ganesh

0 votes

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

posted Sep 28, 2016 by Rupam

+3 votes

2 answers

LTE: Is there any relationship between pre-coding matrix index and rank index ?

posted Sep 25, 2016 by Ganesh

+1 vote

1 answer

LTE: What things are considered when defining logical channel groups for established logical channel ids ?

posted Sep 25, 2016 by Vikram Singh

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1 answer

LTE: Why LTE defined logical channel group (LCG) for the logical channels establish for an UE ?

posted Sep 19, 2016 by Ganesh Kumar

0 votes

1 answer

LTE: What is the difference between buffer status reporting and scheduling request ?

posted Sep 19, 2016 by Ganesh Kumar

+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

+2 votes

1 answer

About logical channel prioritization and scheduler in MAC of UE..

posted Sep 16, 2016 by Sneha Maganahalli

+1 vote

1 answer

Why UE will not report BSR for each logical channel instead of LogicalChannelGroup?

posted Sep 15, 2016 by Gnanendra Reddy

0 votes

1 answer

LTE : What information is sent in buffer status report from UE to eNodeB ?

posted Sep 9, 2016 by Harshita

+1 vote

1 answer

LTE: How does channel quality indicator value impact downlink and uplink resource scheduling for an UE ?

posted Sep 1, 2016 by Ganesh

+1 vote

2 answers

LTE: On what basis either dB or dBm is considered as a measurement unit ?

posted Aug 9, 2016 by Ganesh

+3 votes

0 answers

eNodeB planning by bandwidth

posted Jul 2, 2016 by Tuan Anh Bui Pham

+1 vote

1 answer

What is msg3 buffer in Random Access?

posted Jun 22, 2016 by Sivakumar.d

0 votes

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Why there is a dedicated MAC process for BCH?

posted Jun 22, 2016 by Sumankumar Guniganti

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Why one byte & 2 byte padding in front of MAC PDU

posted May 20, 2016 by Jaganathan

+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

+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

+3 votes

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What are different Scenarios Forced Ack should be send in case of Measurement Gaps are enabled?

posted Apr 28, 2016 by Suchakravarthi Sripathi

+1 vote

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To Measurement gaps implementation(TDD) in MAC layer, please provide some references?

posted Apr 18, 2016 by Suchakravarthi Sripathi