Question: How is a UE-associated signalling connection associated with an F1-C interface instance in a shared radio access network?
Option 1: By allocating a unique Transaction ID to the UE-associated signalling connection.
Option 2: By mapping the gNB-DU UE F1AP ID and gNB-CU UE F1AP ID to a specific F1-C interface instance using partitioned value ranges.
Option 3: By coordinating System Information Broadcast content among sharing PLMNs.
Option 4: By providing warning message duplicates with Message Number and Serial Number.
Explanation: In a shared radio access network, a UE-associated signalling connection is associated with an F1-C interface instance by allocating values for the corresponding gNB-DU UE F1AP ID and gNB-CU UE F1AP ID. This allows the gNB-DU and gNB-CU to map these IDs to a specific F1-C interface instance, enabling proper routing of signalling messages.