5G • RAN
Event A4
Measurement Event A4
Measurement event triggered when a neighbor cell's signal quality rises above an absolute threshold.
Technical Explanation
In Event A4, a neighbor cell exceeds absolute threshold Thresh regardless of serving cell quality. It is commonly used for traffic steering and carrier aggregation SCell addition, identifying when a high-frequency capacity carrier enters good reception range.
Key Functions
- Triggered when neighbor cell becomes better than absolute threshold
- Used for blind traffic steering and carrier offloading
- Guides Carrier Aggregation SCell addition in multi-layer networks
Specifications
3GPP TS 38.331
Interfaces
Uu
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