Why is -110 dBm used for RSRP criteria selection in PLMN?

Hi All.

Why is -110 dBm used for RSRP criteria selection in PLMN?

Because lower than -110 dBm UE may fail to register due to RF.

In 3G it used to be RSSI -100 dBm.

thx for ur answer, can you share with us the source of this information