ForewordIntroduction1 Scope2 References3 Definitions, Symbols and Abbreviations4 Architecture Model and Concepts4.1 Concepts4.2 Architecture Reference Model4.2.1 Architecture for 3GPP Accesses with PMIP-based S5/S84.2.2 Non-roaming Architectures for EPS4.2.3 Roaming Architectures for EPS4.3 Network Elements4.4 Reference Points4.5 High Level Functions4.6 Identities4.7 IP Address Allocation4.8 Network Discovery and Selection4.9 Authentication and Security4.10 QoS Concepts4.11 Charging for Non-3GPP Accesses4.12 Multiple PDN Support4.13 Detach principles5 Functional Description and Procedures for 3GPP Accesses with PMIP-based S5/S85.1 Control and User Plane Protocol Stacks5.2 Initial E-UTRAN Attach with PMIP-based S5 or S85.3 Detach for PMIP-based S5/S85.4 Dedicated Bearer Procedures for E-UTRAN Access with PMIP-based S5/S85.5 UE-initiated Resource Request and Release5.6 Multiple PDN Support with PMIP-based S5/S85.7 Handover and Tracking area Update Procedures for PMIP-based S5/S8 Interface5.8 ME Identity Check Procedures for PMIP-based S5/S85.9 UE-triggered Service Request for PMIP-based S5/S85.10 PMIP-based S5/S8 procedures for GERAN/UTRAN over S45.11 PDN GW initiated IPv4 address Delete Procedure5.12 Location Change Reporting Procedure for PMIP-based S5/S85.13 Support for Machine Type Communications (MTC)6 Functional Description and Procedures for Trusted Non-3GPP IP Accesses6.1 Control and User Plane Protocol Stacks6.2 Initial Attach on S2a6.3 Initial Attach Procedure with DSMIPv6 on S2c in Trusted Non-3GPP IP Access6.4 Detach and PDN Disconnection for S2a6.5 Detach and PDN Disconnection for S2c in Trusted Non-3GPP IP Access6.6 Network-initiated Dynamic PCC6.7 UE-initiated Resource Request and Release6.8 UE-initiated Connectivity to Additional PDN6.9 Void6.10 PDN GW reallocation upon attach on S2c6.11 S2c Bootstrapping via DSMIPv6 Home Link over a Trusted Access6.12 PDN GW initiated Resource Allocation Deactivation6.13 PDN GW initiated IPv4 address Delete Procedure6.14 Non-3GPP access initiated IPv4 address Delete Procedure6.15 IPv4 Home Address Release Procedure for S2c6.16 Enhanced security support for S2c7 Functional Description and Procedures for Un-trusted Non-3GPP IP Accesses7.1 Control and User Plane Protocol Stacks7.2 Initial Attach on S2b7.2.1 Initial Attach with PMIPv6 on S2b7.2.2 Void7.2.3 Initial Attach Procedure with PMIPv6 on S2b and Chained S2b and PMIP-based S87.2.4 Initial Attach with GTP on S2b7.2.5 Initial Attach for emergency session (GTP on S2b)7.3 Initial Attach Procedure for S2c in Untrusted Non-3GPP IP Access7.4 Detach and PDN Disconnection for S2b7.5 Detach and PDN Disconnection for S2c in Un-trusted Non-3GPP IP Access7.6 UE-initiated Connectivity to Additional PDN7.7 Void7.8 S2c Bootstrapping via DSMIPv6 Home Link over an Un-Trusted Access7.9 PDN GW initiated Resource Allocation Deactivation7.10 Dedicated S2b bearer activation with GTP on S2b7.11 S2b bearer modification with GTP on S2b8 Handovers without Optimizations Between 3GPP Accesses and Non-3GPP IP Accesses8.1 Common Aspects for Handover without Optimizations for Multiple PDNs8.2 Handovers between non-3GPP IP access with PMIPv6 on S2a/S2b and 3GPP Access8.2.1 Handover from Trusted or Untrusted Non-3GPP IP Access with PMIPv6 on S2a/S2b to 3GPP Access8.2.2 3GPP Access to Trusted Non-3GPP IP Access Handover with PMIPv6 on S2a8.2.3 3GPP Access to Untrusted Non-3GPP IP Access Handover with PMIPv6 on S2b8.2.4 Void8.2.5 Void8.2.6 Non-3GPP IP Access to 3GPP Access Handover with PMIPv6 on S2a/b for Chained PMIP-based S88.2.7 3GPP Access to Non-3GPP IP Access Handover with PMIPv6 on S2a/b for Chained PMIP-based S88.2.8 Void8.2.9 Void8.3 Handover from 3GPP access to Trusted Non-3GPP IP Access with MIPv4 FACoA on S2a8.3b Handover from Trusted Non-3GPP IP Access with MIPv4 FACoA on S2a to 3GPP access8.4 Handovers with DSMIPv6 on S2c8.5 Handover with Access Network Discovery and Selection8.6 Handovers between non-3GPP IP access with GTP on S2b and 3GPP Access9 Handovers with Optimizations Between E-UTRAN Access and CDMA2000 Access9.1 Architecture and Reference Points9.2 Overview of Handover Procedures9.3 Optimized Active Handover: E-UTRAN Access to cdma2000 HRPD Access9.4 Optimized Idle-mode Mobility: E-UTRAN Access to cdma2000 HRPD Access9.5 Void9.6 Void9.7 S101 Tunnel Redirection Procedure10 Handovers with Optimizations Between 3GPP Accesses and Mobile WiMAX11 Handover Optimizations Applicable to All Non-3GPP Accesses12 Interactions Between HSS and AAA Server13 Information Storage14 Void15 Functional Description and Procedures for 3GPP Accesses with S2c16 Architecture, Functional description and Procedures for GTP and PMIPv6 based S2a over Trusted WLAN Access16.1 Architecture and Functional Description16.1.1 Architecture16.1.2 High level functions16.1.3 Reference points16.1.4 Protocol Stacks16.1.4A Control Plane16.1.4B User plane16.1.5 IP address allocation16.1.6 Bearer model for PDN connectivity service with GTP based S2a16.1.7 Access Network information reporting in case of a TWAN Access16.2 Initial Attach in WLAN on S2a16.2.1 Initial Attach in WLAN on GTP S2a16.2.1a Initial Attach in WLAN for Emergency Service on GTP S2a16.2.2 Initial Attach in WLAN on PMIP S2a16.2.3 HSS retrieval of information about an UE from the TWAN serving that UE16.3 Detach and PDN disconnection in WLAN on S2a16.4 PDN GW initiated Resource Allocation Deactivation in WLAN on S2a16.5 Dedicated bearer activation in WLAN on GTP S2a16.6 Network-initiated bearer modification in WLAN on GTP S2a16.7 Detach in WLAN on S2a for Multi-connection Mode16.8 UE Initiated PDN connectivity request procedure in WLAN on S2a for Multi-connection Mode16.9 UE/TWAN Initiated PDN disconnection for Multi-connection Mode16.10 Handover procedure from 3GPP access to WLAN on S2a16.11 Handover procedure from WLAN on S2a to 3GPP access17 E-UTRAN-HRPD Inter-RAT SON SupportA.1 Direct Peering ScenarioA.2 Proxy-based interworkingC.1 GeneralC.2 Trusted Non-3GPP IP Access to Trusted Non-3GPP IP Access with DSMIPv6 over S2c HandoverC.3 Untrusted Non-3GPP IP Access with PMIPv6 to Trusted Non-3GPP IP Access with PMIPv6 Handover in the Non-Roaming ScenarioC.4 Trusted/Untrusted Non-3GPP IP Access with DSMIPv6 to Trusted Non-3GPP IP Access with PMIPv6 Handover in the Non-Roaming ScenarioC.5 Handover Between Two Untrusted Non-3GPP IP Accesses Connected to the Same ePDGC.6 Handovers between APs of a Non-3GPP Trusted WLAN Access on S2aE.1 Gateway Relocation with PMIPv6 on S2aE.2 Gateway Relocation with MIPv4 FACoA on S2a 9.6 Void 23.4023GPPArchitecture enhancements for non-3GPP accessesRelease 18TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM