Handling of updated CAG configuration
A method for handling updated NPN configuration received via downlink Non-Access Stratum (DL NAS) signaling from a first non-hosting network is provided. In one embodiment, a UE receives an updated CAG related configuration containing one or more CAG(s) associated with (time) validity information. The UE enters the state PLMN-SEARCH and applies a network selection process with the updated CAG related configuration. The UE selects and registers to a second hosting network with one or more CAG(s) included in the updated CAG related configuration and configured with associated (time) validity information, and (time) validity criteria are met.
1 . A method, comprising:
maintaining a User Equipment (UE) configuration for public land mobile network (PLMN) or standalone non-public network (SNPN) selection;
accessing to a first network by the UE, wherein the first network is a non-hosting network;
receiving an updated closed access group (CAG) related configuration containing information of a second network in a downlink non-access stratum (DL NAS) message, wherein the updated CAG related configuration comprises a list of CAG-IDs for the second network, and wherein a CAG-ID from the list of CAG-ID is associated with validity information including corresponding validity criteria;
performing a network selection process based on the updated CAG related configuration; and
selecting and registering to the second network, wherein the corresponding validity criteria associated with the CAG-ID are met.
2 . The method of claim 1 , wherein the accessing to the non-hosting network involves accessing a PLMN via a non-CAG cell, accessing a PLMN via a CAG cell broadcasting the CAG-ID and in the UE configuration the CAG-ID is without validity information, accessing an SNPN broadcasting an SNPN ID and in the UE configuration the SNPN ID is without validity information, or accessing an SNPN which broadcasting a GIN and in the UE configuration the GIN is without validity information.
3 . The method of claim 1 , wherein the network selection process is a PLMN selection process, or an SNPN selection process, or a hosting network selection process, or a localized services network selection process, or a PLMN selection for localized services process.
4 . The method of claim 1 , wherein the UE enables hosting network access mode for localized services, or the UE enters hosting network selection mode for localized services.
5 . The method of claim 1 , wherein the UE performs the network selection process when the UE is configured with a preference of hosting network for localized services.
6 . The method of claim 1 , wherein the validity information includes at least one of time validity information and location validity information.
7 . The method of claim 1 , wherein the UE selects a CAG cell in the second network that broadcasts the CAG-ID that is associated with the validity information.