A user equipment, configured to: • support emergency services over a trusted wireless local area network access to a third generation partnership project evolved packet core network for a user equipment with an international mobile subscriber identity that is not authenticated by the trusted wireless local area network; and • perform a specific extensible authentication protocol-based procedure for access to the evolved packet core network over the trusted wireless local area network for emergency services without authentication, and within the procedure: ∘ receive, from the trusted wireless local area network, an extensible authentication protocol identity request; ∘ send, to the trusted wireless local area network, an extensible authentication protocol identity response including the international mobile subscriber identity; ∘ receive, from the trusted wireless local area network, an extensible authentication protocol request - limited service message including an indication that the access is for limited service with no authentication; and ∘ send, to the trusted wireless local area network, an extensible authentication protocol response - limited service message including an indication of a trusted wireless local area network access network connection mode among a single-connection mode and a multiple-connection mode. • support emergency services over a trusted wireless local area network access to a third generation partnership project evolved packet core network for a user equipment with an international mobile subscriber identity that is not authenticated by the trusted wireless local area network; and • perform a specific extensible authentication protocol-based procedure for access to the evolved packet core network over the trusted wireless local area network for emergency services without authentication, and within the procedure: ∘ receive, from the trusted wireless local area network, an extensible authentication protocol identity request; ∘ send, to the trusted wireless local area network, an extensible authentication protocol identity response including the international mobile subscriber identity; ∘ receive, from the trusted wireless local area network, an extensible authentication protocol request - limited service message including an indication that the access is for limited service with no authentication; and ∘ send, to the trusted wireless local area network, an extensible authentication protocol response - limited service message including an indication of a trusted wireless local area network access network connection mode among a single-connection mode and a multiple-connection mode. ∘ receive, from the trusted wireless local area network, an extensible authentication protocol identity request; ∘ send, to the trusted wireless local area network, an extensible authentication protocol identity response including the international mobile subscriber identity; ∘ receive, from the trusted wireless local area network, an extensible authentication protocol request - limited service message including an indication that the access is for limited service with no authentication; and ∘ send, to the trusted wireless local area network, an extensible authentication protocol response - limited service message including an indication of a trusted wireless local area network access network connection mode among a single-connection mode and a multiple-connection mode.