Question: In E-UTRAN, when the source eNB's UE History Information list is full, how does it manage new information, considering availability from the User Equipment (UE)?
Option 1: The source eNB prioritizes storing new information over retaining existing records, discarding the newest cell record to make space.
Option 2: The source eNB maintains its existing records and ignores the newly available UE history information from the UE until space is freed.
Option 3: The list's oldest cell record is discarded first to accommodate new information, regardless of whether it comes from the UE or not.
Option 4: The source eNB splits the storage between the newest and oldest records, allocating half to each type when the list is full.
Explanation: This approach ensures that the most recent activity (new information) is captured while removing the least relevant data (oldest cell record) to maintain an efficient use of storage space for UE History Information. This method supports effective handover preparations by providing a balanced view of recent and past cell interactions, aiding in network optimization and user experience enhancement.