How does UE select a particular PLMN selection in 5G?

5G NR
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1

How do UE select a particular PLMN selection in 5G?

Also, can anyone tell me how PLMN selection and Cell selection differs in RRC?

2

If it for ENDC case then it happen at 4G end.
If for 5G SA case then after ssb sync, SIB reading it will go for cell selection with Hplmn, eplmn list.

3

Also note that PLMN list is built in Sim card with list of priorities and even blacklisted PLMNs.
Mobile sends request based on this list and NW authenticates (Attach accept).

4

PLMN selection follows SIM EF priorities from EF_xPLMN where x can be EH/OP/UP Equivalent Home, Operator Preferred, User Preferred with respective RAT priorities in EF_xPLMNwact files.
Cell Selection is performed after PLMN selection, depending upon Cell Selection criteria.

5

Sequence after UE power on .

  1. PSS/SSS sync
  2. MIB/SIB reading
  3. PLMN selection
  4. Cell selection
  5. RACH procedure
  6. RRC phase
1 Like
6

OK. For 5G NR also is the same, right?

7

Yes, correct.