Question: In a split gNB architecture, when a gNB-DU in the aggressor set detects a Remote Interference Management Reference Signal (RIM-RS), what action does it take next?
Option 1: It directly forwards the RIM-RS to all gNBs in the victim set.
Option 2: It sends the RIM-RS detection status and the victim Set ID to the serving cell's associated UE.
Option 3: It sends the RIM-RS detection status and the victim Set ID to the gNB-CU for coordination.
Option 4: It ignores the RIM-RS if the interference level is below a predetermined threshold.
Explanation: In a split gNB architecture, the gNB-DU's role in remote interference management involves detecting RIM-RS and reporting to its higher functional entity for coordination. The gNB-CU acts as this coordinator, merging information from multiple gNB-DUs (aggressor set) to effectively manage interference across sets (victim set). Thus, upon detecting an RIM-RS, the gNB-DU would send the detection status and relevant IDs to the gNB-CU for further action, ensuring a coordinated approach to mitigating remote interference.