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

+2 votes
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When an UE switch on, first it synchronizes (PSS and SSS) with cell and start reading system information. My question is what UE does after getting system bandwidth information from MIB ? What is the significance of this for an UE ? Does UE take different actions based on cell bandwidth ?

posted May 4, 2016 by Vikram Singh

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1 Answer

+5 votes

What is the significance for an UE?
- UE would have information about number of subcarriers once it decodes MIB and that is very crucial for decoding any channels/info..
What UE does after getting system bandwidth information from MIB ? Does UE take different actions based on cell bandwidth?
- After MIB, PCFICH which is carried by 4 REGs evenly distributed across the whole band regardless of the bandwidth will be decoded.
- PCFICH carries the number of symbols that can be used for PDCCH & PHICH i.e. control channels.
The exact position of PCFICH is determined by CELL ID(derived from synchronization) and BW(carried by MIB)
- The rest follows.

answer May 5, 2016 by Bhaskar Kalaria
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