POWER ON PROCEDURE

When UE is getting power on, No idea of frequency to be latched.

FBS=Full Band Scan(For New Phone/New SIM)

DBS=Derived Band Scan(For Old Phone/Old SIM)

UE POWER ON

STEP1: RSSI Scan(it is just to measuring power/power level)

Lets take an example, Our UE support bands like 2,3,20.

FREQUENCY_SCAN_REQ  Earfcn 760(B2),1348(B3),6289(B20) report RSSI.

STEP2: Filter by RSSI Threshold


CELL_SCAN_REQ Earfcn 1348(B3)

STEP3: PSS,SSS Decoding

STEP4: MIB Decoding

STEP5: SIB Decoding



POWER ON PROCEDURE IN DETAIL









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