Question: What is the unit of measurement for the UE's sidelink transmission power on a carrier frequency as specified by the SL-TxPower Information Element in E-UTRA RRC protocol?
Option 1: Watts (W)
Option 2: Decibel-milliwatts (dBm)
Option 3: Kilowatt-hours (kWh)
Option 4: Milliwatts (mW)
Explanation: The correct unit of measurement for the UE's sidelink transmission power, as defined by the SL-TxPower IE in the context of E-UTRA RRC protocol, is Decibel-milliwatts (dBm). This unit is specifically used for measuring power levels in wireless communication systems, allowing for efficient and standardized expression of transmit power limitations. In contrast, Watts (W), Kilowatt-hours (kWh), and Milliwatts (mW) are not the specified units for this particular context within the E-UTRA RRC protocol.