Nice explanation on what some of you may find: UE overheating for EN-DC:
It happens when EN-DC UE is close to NSA site and loose coverage, whereas 5G site is working well.
UE internal temperature is high (exceeeds 42 degrees).
Note: UE enters overheating mode and it is a kind of protection.
- Melt the central processing unit (CPU)
- Shorte devices’s life span
- Drain / damage battery
- UE is in a high transmission rate
- Playing graphically intensive games
- Use UE under Sunlight or hot weather
Temporarily suspend all services - except phone and contacts. As a result, eNB send release requirement to gNB with the reason “user-Inactivity”.
UE trigger fake A2 event, to force gNB to send release request.
UE address the overheating by sending a UEAssistanceInformation message that contains IEs “reducedMaxCCs”, then eNB release SgNB to reduce the peak data rate.
3GPP R2-1808414, UE overheating for EN-DC