Will UE transmit SRS for Whole bandwidth or particular BWP?

Question

If UE is transmitting particular BWP then How ENB will switch an BWp?Based on what measure ENB will decide?

Answer 1

Whole avaialble bandwidth. this information is in last OFDM symbol.

Answer 2

Bandwidth Part (BWP) switching/operation can be done by several different ways such as:

Dedicated RRC Signaling
Over PDCCH channel Downlink control information (DCI)- DCI 0_1 (UL Grant) and DCI 1_0 (DL Scheduling)
By bwp-inactivityTimer – ServingCellConfig.bwp-InactivityTimer
By MAC CE (Control Element)

Reference: 3GPP 38.321-5.15

Comments

Typically UE will send SRS on configured BWP, however UE can be directed to send SRS beyond its BWP if UE supports larger BW.