Network slicing authentication is the secondary EAP procedure defined in 3GPP TS 23.501/TS 23.502 that verifies subscriber entitlement to a specific S-NSSAI before PDU session establishment – distinct from primary 5G-AKA authentication. Per-slice billing requires the AAA server to carry the S-NSSAI as a charging attribute on the Gy interface, generating separate CDRs per […]