Methods and apparatuses for performing cell (re)selection in non-public network
A method performed by a BS for cell selection or reselection is provided. The method includes transmitting, to a UE, allowed NPN information that is in a form of a CAG ID list or in a form of an SNPN ID list; and transmitting, to the UE, NPN information and area information associated with the NPN information via a SIB1, the NPN information including an NPN ID list. In a case that the allowed NPN information is in the form of the CAG ID list, the allowed NPN information enables the UE to perform a first procedure. In a case that the allowed NPN information is in the form of the SNPN ID list, the allowed NPN information enables the UE to perform a second procedure. ABS using the method is also provided.
1. A method performed by a Base Station (BS) for cell selection or reselection, the method comprising:
transmitting, to a User Equipment (UE), allowed Non-Public Network (NPN) information that is in a form of a Cell Access Group (CAG) Identity (ID) list or in a form of a Stand-alone Non-Public Network (SNPN) ID list; and
transmitting, to the UE, NPN information and area information associated with the NPN information via a System Information Block (SIB) Type 1 (SIB1), the NPN information comprising an NPN ID list, wherein:
in a case that the allowed NPN information is in the form of the CAG ID list, the allowed NPN information enables the UE to perform a first procedure;
in a case that the allowed NPN information is in the form of the SNPN ID list, the allowed NPN information enables the UE to perform a second procedure;
the first procedure comprises:
selecting a Public Land Mobile Network (PLMN) to register, and
selecting a cell to camp on after determining that a first NPN ID in the NPN ID list comprises a first PLMN ID and a CAG ID, the first PLMN ID identifying the PLMN, the CAG ID belonging to the CAG ID list, the CAG ID associated with a CAG belonging to the PLMN; and
the second procedure comprises:
selecting the cell to camp on after determining that a second NPN ID in the NPN ID list comprises a second PLMN ID and a Network ID (NID), the second PLMN ID and the NID belonging to the SNPN ID list.
2. The method of claim 1 , wherein the area information comprises at least one of a Tracking Area Code (TAC), a cell ID, and a Radio Access Network Area Code (RANAC).
3. The method of claim 1 , wherein a maximum number of NPN IDs in the NPN ID list is configured by the cell as 12.
4. The method of claim 1 , wherein the first NPN ID indicates a Public Network Integrated NPN (PNI-NPN) deployed with support of the PLMN.
5. The method of claim 1 , wherein the second NPN ID indicates an SNPN.
6. The method of claim 1 , wherein the first procedure further comprises:
filtering out all NPN IDs excluding the first PLMN ID from the NPN ID list; and
selecting an NPN ID that includes the CAG ID belonging to the CAG ID list from a remaining portion of the NPN ID list as the first NPN ID.
7. The method of claim 1 , wherein each SNPN ID in the SNPN ID list comprises a PLMN ID portion and an NID portion.
8. The method of claim 7 , wherein:
the second PLMN ID in the second NPN ID matches the PLMN ID portion of an SNPN ID in the SNPN ID list; and
the NID in the second NPN ID matches the NID portion of the SNPN ID in the SNPN ID list.
9. The method of claim 1 , wherein the area information comprises first area information and second area information, the first area information is associated with the first NPN ID, and the second area information is associated with the second NPN ID.
10. The method of claim 1 , wherein the second procedure further comprises:
filtering out all NPN IDs excluding the second PLMN ID and the NID from the NPN ID list; and
selecting an NPN ID that includes the second PLMN ID and the NID from a remaining portion of the NPN ID list as the second NPN.
11. A Base Station (BS) comprising:
at least one memory storing a set of instructions; and
at least one processor coupled to the at least one memory, the at least one processor configured to execute the set of instructions to:
transmit, to a User Equipment (UE), allowed Non-Public Network (NPN) information that is in a form of a Cell Access Group (CAG) Identity (ID) list or in a form of a Stand-alone Non-Public Network (SNPN) ID list; and
transmit, to the UE, NPN information and area information associated with the NPN information via a System Information Block (SIB) Type 1 (SIB1), the NPN information comprising an NPN ID list, wherein:
in a case that the allowed NPN information is in the form of the CAG ID list, the allowed NPN information enables the UE to perform a first procedure;
in a case that the allowed NPN information is in the form of the SNPN ID list, the allowed NPN information enables the UE to perform a second procedure;
the first procedure comprises:
selecting a Public Land Mobile Network (PLMN) to register, and
selecting a cell to camp on after determining that a first NPN ID in the NPN ID list comprises a first PLMN ID and a CAG ID, the first PLMN ID identifying the PLMN, the CAG ID belonging to the CAG ID list, the CAG ID associated with a CAG belonging to the PLMN; and
the second procedure comprises:
selecting the cell to camp on after determining that a second NPN ID in the NPN ID list comprises a second PLMN ID and a Network ID (ND), the second PLMN ID and the ND belonging to the SNPN ID list.
12. The BS of claim 11 , wherein the area information comprises at least one of a Tracking Area Code (TAC), a cell ID, and a Radio Access Network Area Code (RANAC).
13. The BS of claim 11 , wherein a maximum number of NPN IDs in the NPN ID list is configured by the cell as 12.
14. The BS of claim 11 , wherein the first NPN ID indicates a Public Network Integrated NPN (PNI-NPN) deployed with support of the PLMN.
15. The BS of claim 11 , wherein the second NPN ID indicates an SNPN.
16. The BS of claim 11 , wherein the first procedure further comprises:
filtering out all NPN IDs excluding the first PLMN ID from the NPN ID list; and
selecting an NPN ID that includes the CAG ID belonging to the CAG ID list from a remaining portion of the NPN ID list as the first NPN ID.
17. The BS of claim 11 , wherein each SNPN ID in the SNPN ID list comprises a PLMN ID portion and an NID portion.
18. The BS of claim 17 , wherein:
the second PLMN ID in the second NPN ID matches the PLMN ID portion of an SNPN ID in the SNPN ID list; and
the NID in the second NPN ID matches the NID portion of the SNPN ID in the SNPN ID list.
19. The BS of claim 11 , wherein the area information comprises first area information and second area information, the first area information is associated with the first NPN ID, and the second area information is associated with the second NPN ID.
20. The BS of claim 11 , wherein the second procedure further comprises:
filtering out all NPN IDs excluding the second PLMN ID and the NID from the NPN ID list; and
selecting an NPN ID that includes the second PLMN ID and the NID from a remaining portion of the NPN ID list as the second NPN ID.