Question: After receiving an RRC reconfiguration for a UE-specific Carrier Bandwidth (CBW) change, what is the condition for a UE to start receiving PDSCH/PDCCH on a new CBW's active Downlink (DL) BWP or transmitting PUSCH on a new CBW's active Uplink (UL) BWP?
Option 1: Immediately after the RRC reconfiguration message is sent by the eNodeB.
Option 2: After a fixed duration of 10 milliseconds from the end of the DL slot containing the RRC command.
Option 3: Following a time duration of **T** slots, where **T** = (RRC procedure delay) + (Time used by UE to perform CBW change), starting from the beginning of DL slot **n**, which is the last slot overlapping with the PDSCH containing the RRC command.
Option 4: Once the UE completes its current transmission/reception on the old CBW, without any specific delay requirement.
Explanation: This option correctly reflects the specified condition for a UE to initiate operations on a new CBW after receiving an RRC reconfiguration command. The time duration (**T**) accounts for both the RRC procedure delay and the UE's internal processing time for the CBW change, ensuring seamless transition to the new CBW without interrupting ongoing transmissions or receptions, aligning with efficient radio resource management principles in 5G NR networks.