Section: 5.4.7.2.1 Network slice-specific EAP message reliable transport procedure initiation
Content: In order to initiate the network slice-specific EAP message reliable transport procedure, the AMF shall create a NETWORK SLICE-SPECIFIC AUTHENTICATION COMMAND message. The AMF shall set the EAP message IE of the NETWORK SLICE-SPECIFIC AUTHENTICATION COMMAND message to the EAP-request message which is generated by the AMF or provided by the AAA-S via the NSSAAF. The AMF shall set the S-NSSAI IE of the NETWORK SLICE-SPECIFIC AUTHENTICATION COMMAND message to the HPLMN S-NSSAI or the SNPN S-NSSAI to which the EAP-request message is related. The AMF shall send the NETWORK SLICE-SPECIFIC AUTHENTICATION COMMAND message and start timer T3575 per S-NSSAI (see example in figure 5.4.7.1.1). Upon receipt of a NETWORK SLICE-SPECIFIC AUTHENTICATION COMMAND message, the UE shall stop timer T3346 if running. The UE shall pass: a) the EAP-request message received in the EAP message IE; and b) the HPLMN S-NSSAI or the SNPN S-NSSAI in the S-NSSAI IE; to the upper layers. Apart from this action, the network slice-specific authentication and authorization procedure is transparent to the 5GMM layer of the UE.