Question: In a 5G E-UTRA network, which specification primarily influences the implementation of reduced control plane latency in User Equipment (UE), alongside RRC protocol aspects?
Option 1: Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception
Option 2: System Architecture for the 5G System; Stage 2
Option 3: Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures
Option 4: Telecommunication management; Performance Management (PM); Performance measurements for E-UTRA
Explanation: Reduced control plane latency in E-UTRA, specifically for User Equipment (UE), is heavily dependent on physical layer procedures to minimize latency. While RRC protocol aspects play a crucial role in signaling and resource allocation, the actual reduction of latency at the physical layer is primarily governed by specifications related to physical layer procedures, making this the most directly influential specification for this feature alongside RRC protocol considerations.