Question: For which of the following UTRA (UMTS Terrestrial Radio Access) types is the relative accuracy requirement applicable, as per the defined measurement of Carrier RSSI across different frequencies, for Release 6 and onwards?
Option 1: Only TDD (Time Division Duplex) UEs
Option 2: Specific to GSM (Global System for Mobile Communications) handovers
Option 3: Limited to HSPA (High Speed Packet Access) enabled UEs
Option 4: All types of UTRA for FDD (Frequency Division Duplex) UEs
Explanation: The correct answer is Option 4 because, according to the specification, the relative accuracy requirement applies to all types of UTRA (which encompasses various cellular technologies under the UMTS umbrella) specifically for FDD (Frequency Division Duplex) User Equipment (UEs), starting from Release 6 and later releases. This ensures consistent performance across different frequencies for FDD UEs in UTRA networks.