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How Data Transmission in UL in LTE?

In UL, the UE has no dedicated resources to transmit directly when new data arrived in the buffer from higher layer.  It requests resources to transmit them.  It receives radio resources.  It transmits them.   The scheduling request is sent on the Physical Uplink Control Channel (PUCCH).  This channel carries radio signaling in uplink:  Scheduling … Read more

How CQI, PMI and RI reporting by UE in LTE?

The UE is requested to send either periodic or a periodic reports concerning • Rank indication (RI) Reports are applicable for closed- and open-loop spatial multiplexing. In case of open-loop TRI=1 corresponds to transmit diversity and TRI>1 to large delay CDD. • Precoding matrix indicator (PMI) PMI reporting is relevant for spatial multiplexing (open- and … Read more