Signaling of associated network identifier

1. A method performed by a user equipment (UE) configured to operate in a wireless communication system, the method comprising:

receiving, from a network, information for a list of stand-alone non-public networks (SNPNs);

receiving, from the network, system information comprising information for a list of group identifiers of the network and information for a list of bitmaps;

identifying one or more group identifiers supported by each SNPN in the list of SNPNs based on:

an n-th entry in the list of bitmaps corresponding to an n-th SNPN in the list of SNPNs;

a k-th bit from a left side in each bitmap corresponding to a k-th group identifier among group identifiers related to the list of group identifiers; and

a bit set to 1 in a bitmap informing that a corresponding group identifier is supported by a SNPN corresponding to the bitmap;

selecting a SNPN which broadcasts a group identifier of the network among one or more group identifiers supported by a subscribed SNPN in the list of SNPNs; and

selecting a cell of the selected SNPN to camp on.

2. The method of claim 1 , wherein each of the group identifiers related to the list of group identifiers is represented by a pair or combination of a public land mobile network (PLMN) identifier (ID) and a network identifier (NID).

3. The method of claim 1 , wherein a size of each bitmap is identical to a number of the group identifiers related to the list of group identifiers.

4. The method of claim 1 , wherein a number of bitmaps in the list of bitmaps is identical to a number of SNPNs in the list of SNPNs.

5. The method of claim 1 ,

wherein each element in the list of group identifiers comprises a group identifier (ID) for network selection (GIN) element, and

wherein the GIN element comprises a public land mobile network (PLMN) ID and a list of one or more network IDs (NIDs).

6. The method of claim 5 ,

wherein a pair or combination of the PLMN ID and each of the one or more NIDs represents a GIN among one or more GINs in the GIN element, and

wherein the GIN corresponds to each of the group identifiers related to the list of group identifiers.

7. The method of claim 6 , wherein the k-th group identifier among the group identifiers related to the list of group identifiers comprises a GIN index k.

8. The method of claim 1 ,

wherein the information for the list of SNPNs is included in a system information block type 1 (SIB1), and

wherein the information for the list of group identifiers of network and the information for the list of bitmaps are included in an SIB other than the SIB1 and is received after the SIB1 is received.

9. The method of claim 1 , wherein the group identifiers are used for the UE to access to an SNPN with credentials owned by a credential holder separate from the SNPN.

10. The method of claim 1 ,

wherein the group identifiers are used for onboarding of the UE to an SNPN, and

wherein the onboarding of the UE to the SNPN comprises allowing the UE to access an onboarding network (ONN) for providing the UE with SNPN credentials for a primary authentication and information to select and register with the SNPN.

11. The method of claim 1 , wherein the UE is in communication with at least one of a network, or autonomous vehicles.

12. A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:

at least one transceiver;

at least processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

receiving, from a network, information for a list of stand-alone non-public networks (SNPNs);

receiving, from the network, system information comprising information for a list of group identifiers of network and information for a list of bitmaps;

identifying one or more group identifiers supported by each SNPN in the list of SNPNs based on:

an n-th entry in the list of bitmaps corresponding to an n-th SNPN in the list of SNPNs;

a k-th bit from a left side in each bitmap corresponding to a k-th group identifier among group identifiers related to the list of group identifiers; and

a bit set to 1 in a bitmap informing that a corresponding group identifier is supported by a SNPN corresponding to the bitmap;

selecting a SNPN which broadcasts a group identifier of the network among one or more group identifiers supported by a subscribed SNPN in the list of SNPNs; and

selecting a cell of the selected SNPN to camp on.

13. A network node configured to operate in a wireless communication system, the network node comprising:

at least one transceiver;

at least processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

constructing a list of stand-alone non-public networks (SNPNs);

constructing a list of group identifiers of a network;

constructing a list of bitmaps in which an n-th entry corresponds to an n-th SNPN in the list of SNPNs, wherein the constructing of the list of bitmaps comprises constructing each bitmap in which:

a k-th bit from left side corresponds to a k-th group identifier among group identifiers related to the list of group identifiers; and

a bit set to 1 informs that a corresponding group identifier is supported by a SNPN corresponding to each bitmap;

transmitting, to a user equipment (UE), information for the list of SNPNs; and

transmitting, to the UE, system information comprising information for the list of group identifiers of network and information for the list of bitmaps.