Question: What is the primary purpose of the Power Management Indicator in the Power Headroom Report (PHR) in E-UTRA?
Option 1: To indicate the UE's current battery level to the eNodeB.
Option 2: To support additional power backoff due to power management, as allowed by P-MPRc.
Option 3: To request a handover to a different cell due to poor coverage.
Option 4: To notify the network about a change in UE's transmission mode.
Explanation: The Power Management Indicator in PHR signals when a User Equipment (UE) applies additional power backoff due to its own power management, constrained by P-MPRc. This helps the network (eNodeB) understand and adjust expectations from the UE's transmission power capabilities for efficient radio resource management.