Question: What is the primary purpose of the simultaneousTx-differentTx-duration-r15 field in UE radio access capabilities, as related to E-UTRA?
Option 1: To indicate whether a UE supports simultaneous transmission of different transmission durations (subframe, slot, or subslot) across various carriers.
Option 2: To specify the maximum number of carriers a UE can handle for simultaneous transmission with the same transmission duration.
Option 3: To define the minimum transmission duration (subframe, slot, or subslot) for all simultaneous transmissions across different carriers.
Option 4: To report the UE's capability for varying transmission power levels across multiple carriers during simultaneous transmission.
Explanation: This field enables reporting of a UE's support for simultaneous transmissions with varying durations (subframe, slot, or subslot) over different carriers, crucial for network planning and resource allocation in heterogeneous transmission scenarios.