Hello All.
Does anybody knows the trigger point of “x2 partial reset” from gNB to eNB for specific UEs?
(PARTIAL RESET REQUIRED message from gNB)
In what condition gNB may trigger that for a bunch of UEs?
I asked chatGPT and here is the answer:
The message “x2 PARTIAL RESET REQUIRED” typically pertains to the X2 interface in a mobile network, and it is not a message sent by the gNB (gNodeB), but rather a message that might be initiated by the eNodeB (Evolved NodeB) or other network elements in certain network scenarios.
The X2 interface is used for communication between adjacent eNodeBs (base stations) in LTE (Long-Term Evolution) and 5G networks. One of the reasons for a “PARTIAL RESET REQUIRED” message can be when there is a need to reset or reconfigure part of the X2 interface due to various network events or issues.
Here are some scenarios where a “PARTIAL RESET REQUIRED” message might be triggered:
X2 Interface Configuration Changes: When there are changes in the configuration of the X2 interface, such as adding or removing neighbors, or changing security settings, a partial reset may be necessary to apply these changes.
Neighbor Cell Handover: During handover procedures between neighboring cells, especially in the context of mobility management, the X2 interface may need to undergo partial resets to ensure that the handover is successful.
X2 Interface Fault Recovery: If there are issues or faults detected on the X2 interface, a partial reset may be required to recover from these issues and restore proper communication.
Software or Configuration Updates: When software updates or configuration changes are made to eNodeBs, these updates may require a partial reset to ensure that the changes take effect without causing network disruptions.
It’s important to note that the specifics of when and why a “PARTIAL RESET REQUIRED” message is sent can vary depending on the network equipment vendor, the network architecture, and the network’s operational requirements. This message is part of the network management and maintenance processes and is used to ensure the stability and performance of the mobile network.
This is from 3gpp:
Both meNB or gNB can trigger it, but in what conditions it might be triggering, no information… 
Probably auto triggered when there are X2 glitches or alarms or PCI changes.
Additionaly: This message includes a bunch of UEs, so i am thinking on when eNB or gNB detects problematic UEs it sends partial reset to delete the content of those UEs.
Can you check, does it happens when ANR is ON or OFF ?