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At what stage before a UE sends attach request, the DCI is seen in the downlink?

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At what stage before a UE sends attach request, the DCI is seen in the downlink? I assume it's conveyed in the RRC, but not clear where to look for it in the RRC log. May be I'm not searching for the right keyword.

posted Sep 3, 2014 by anonymous

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1 Answer

+1 vote

After reading MIB which comes on PBCH. UE will try to read SIB1 whose repetition is fixed. But location of SIB1 on PDSCH across the bandwidth, UE doesn't know. So, UE will decode PDCCH to find out location of SIB1.
And to decode location of SIBs on PDCCH , UE will read DCI and that DCI will get scrambled with SRNTI. By decoding this information UE can read further system information.

So, the first time UE reads DCI information before attach is at the time of trying to decode SIB1.

answer Sep 22, 2014 by Aarti Jain
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