4GNation
Friday, March 25, 2016
What is the use of Rank Indication in LTE
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The eNodeB configures the RI reporting periodicity for every UE during the attach procedure and UE has to honour it. The RI reporting period...
Wednesday, March 23, 2016
Basic LTE call flow
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LTE terminal must perform certain steps before it can receive or transmit data. These steps can be categorized in cell search and cell sel...
Monday, February 8, 2016
How the UE goes out of sync in LTE?
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The full procedure for determining if the link has failed due to being out of sync is shown in the figure below. There are 3 main parameters...
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Friday, February 5, 2016
RACH Preamble and Root Sequence Planning
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The total number of RACH preambles available in LTE is 64. These preambles are shared among users for initial access and handover. Access to...
Friday, December 4, 2015
System Frame Number (SFN) and Subframe Number
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SFN and Subframe In any communication, one of the most important requirement would be that the transmitter and receiver operate at the ...
Friday, October 16, 2015
What is radio retransmission in LTE?
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The radio retransmission mechanism is called Hybrid Automatic Request (H-ARQ). H-ARQ allows to retransmit fastly erroneous blocks betwee...
Saturday, October 10, 2015
Detach Cases in LTE
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1) Detach Case 1: UE-initiated Detach UE can initiate detach: if UE is turned off if a USIM card is removed from UE if UE is attempting t...
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