Question: What is excluded from the 'Maximum UL cell PDCP SDU bit-rate' measurement in E-UTRAN Performance Management?
Option 1: Only retransmissions, to focus on first-time successful transmissions.
Option 2: Both control signalling and retransmissions, to isolate user plane traffic success.
Option 3: All types of packet switched traffic, focusing solely on circuit switched traffic.
Option 4: Measurements from QCIs with lower priority, prioritizing high-priority QCI measurements.
Explanation: The correct answer is Option 2 because the 'Maximum UL cell PDCP SDU bit-rate' measurement specifically aims to represent successful transmissions of user plane traffic. To achieve this, it excludes control signalling (which is not part of user plane traffic) and retransmissions (which indicate initial transmission failures), ensuring the measurement reflects the peak rate of successfully transmitted user data on the uplink.