Does UE sends measurement reports periodically or only event occurs?

Question

If ENB configures some measurement event say A1,A2,A3 etc, take e.g A2 event threshhold as -100Dbm, and serving cell thrs crosses -100 then UE will send A2, after this event UE is still facing signal strength as -100dB over a long period, will UE sends second time A2 event or only once?

Answer 1

Hi, event A2 triggered at:
MEAsserv + Hyst < Threshold
If serving cell becomes worse than a threshold (example= -100dbm) it generates A2 . After generating the A2, I think UE will not report A2 frequently .
As Hyst value is configured, it reduces the number of Measurement Report messages sent to the eNB for small fluctuation.
Hysterisis will prevent unnecessarily frequent measurement report caused by small range of fluctuation.
If the fluctuation is higher ( serving cell /neighbor cell), it will take decision based on that.
Also, report can be event-triggered or periodical. An event-based measurement report will be transmitted when the criteria meet.
Periodical measurement reports are sent based on the reporting configuration. Its operator specific.