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When to use DCI 3/3A: Even though we have DCI 0/1/2 to send TPC why do we need separate DCI 3/3A format for TPC?

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When to use DCI 3/3A: Even though we have DCI 0/1/2 to send TPC why do we need separate DCI 3/3A format for TPC?
posted Mar 21, 2017 by Karan Patel

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when you don't have to give UL grant then ENB cannot use DCI0 formats then in that scenario it has to use DCI 3./3A to give TPC

answer Mar 22, 2017 by Rohit Verma
If UE don't have UL data then why it need TPC .
Suppose IF UE is configured with CQI and SRS then there is no need of giving explicit UL grant ,then in this case UE need TPC to adjust.
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