{"schema_version":1,"updated_at":"2026-09-30","provenance_note":"Reviewed Atlas semantic orientation data. Curated records are not normative 3GPP assignments; release bounds are included only where reviewed evidence supports them.","records":{"procedures":[{"id":"registration","name":"5G Registration","summary":"UE registration into 5GS across RRC, NAS, NGAP, core procedure and security.","steps":[["38.331","RRC connection / signalling radio bearer","UE ↔ NG-RAN"],["24.501","Registration Request / NAS procedure","UE ↔ AMF"],["38.413","NGAP transport and UE context","NG-RAN ↔ AMF"],["23.502","Registration procedure orchestration","5GS procedure"],["23.501","AMF/UDM/AUSF roles and system model","Architecture"],["33.501","Authentication and NAS security","Security"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3145"},{"id":"pdu-session","name":"PDU Session Establishment","summary":"End-to-end session creation from UE NAS signalling to SMF policy and user-plane resources.","steps":[["24.501","PDU Session Establishment Request","UE ↔ AMF"],["23.502","PDU Session establishment procedure","5GS procedure"],["29.502","SMF service operations","AMF ↔ SMF"],["23.503","Policy/QoS framework","Policy"],["38.413","PDU Session Resource Setup","AMF ↔ NG-RAN"],["29.281","GTP-U user-plane tunnel","User plane"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3145"},{"id":"handover","name":"NG-RAN Handover","summary":"Mobility path across RRC, Xn/NG signalling and 5GS mobility procedures.","steps":[["38.331","Measurements and RRC mobility configuration","UE ↔ NG-RAN"],["38.423","Xn handover signalling","gNB ↔ gNB"],["38.413","N2 handover signalling","NG-RAN ↔ AMF"],["23.502","5GS handover procedure","Core procedure"],["23.501","Mobility architecture","Architecture"],["33.501","Security context handling","Security"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3145"},{"id":"service-request","name":"5GS Service Request","summary":"Reconnect a CM-IDLE UE to active 5GS signalling and user-plane service.","steps":[["24.501","Service Request / Service Accept NAS procedure","UE ↔ AMF"],["23.502","Service Request procedure orchestration","5GS procedure"],["38.413","NGAP UE-associated signalling and context handling","NG-RAN ↔ AMF"],["23.501","Connection-management states and reachability model","Architecture"],["33.501","Security context use during service resumption","Security"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/23502.htm"},{"id":"deregistration","name":"5GS Deregistration","summary":"UE-initiated or network-initiated removal of 5GS registration state.","steps":[["24.501","Deregistration Request / Accept","UE ↔ AMF"],["23.502","Deregistration procedure orchestration","5GS procedure"],["23.501","Registration-management state model","Architecture"],["33.501","Security context handling","Security"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/23502.htm"},{"id":"paging","name":"5GS Paging","summary":"Reach a CM-IDLE UE through 5GC and NG-RAN paging before service resumption.","steps":[["23.502","Network-triggered service and paging procedure","5GS procedure"],["38.413","NGAP Paging","AMF ↔ NG-RAN"],["38.331","RRC Paging","NG-RAN → UE"],["23.501","CM-IDLE reachability and registration areas","Architecture"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/23502.htm"},{"id":"ng-setup","name":"NG Setup","summary":"Establish the NG-C control relationship between an NG-RAN node and AMF.","steps":[["38.413","NG Setup procedure","NG-RAN ↔ AMF"],["38.401","NG-RAN architecture and NG interface context","RAN architecture"],["23.501","N2 reference point and AMF role","5GS architecture"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/38413.htm"},{"id":"initial-context-setup","name":"Initial Context Setup","summary":"Create the initial UE-associated NG-RAN context, including security and bearer-related context.","steps":[["38.413","Initial Context Setup procedure","AMF ↔ NG-RAN"],["23.502","Registration/service procedure context","5GS procedure"],["38.331","RRC configuration applied to the UE","UE ↔ NG-RAN"],["33.501","Access-stratum and NAS security context","Security"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/38413.htm"},{"id":"pdu-session-resource-setup","name":"PDU Session Resource Setup","summary":"Realise core-network PDU session decisions as NG-RAN radio/user-plane resources.","steps":[["23.502","PDU Session establishment orchestration","5GS procedure"],["38.413","PDU Session Resource Setup","AMF ↔ NG-RAN"],["38.331","DRB and radio configuration","UE ↔ NG-RAN"],["29.281","GTP-U user-plane tunnel","NG-RAN ↔ UPF"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/38413.htm"},{"id":"xn-handover","name":"Xn-based Handover","summary":"Prepare and execute intra-NG-RAN mobility using Xn signalling before core-network path update.","steps":[["38.423","XnAP handover preparation and execution signalling","source gNB ↔ target gNB"],["38.401","Xn architecture and node roles","NG-RAN architecture"],["38.331","RRC mobility command and UE reconfiguration","NG-RAN ↔ UE"],["23.502","5GS handover and path-switch procedure","5GS procedure"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/38423.htm"},{"id":"f1-ue-context","name":"F1 UE Context Setup","summary":"Coordinate UE context between gNB-CU and gNB-DU across the F1 split.","steps":[["38.473","F1AP UE Context Setup / Modification","gNB-CU ↔ gNB-DU"],["38.401","gNB-CU/gNB-DU architecture","NG-RAN architecture"],["38.331","RRC configuration controlled by the gNB-CU","UE radio control"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/38473.htm"},{"id":"e1-bearer-context","name":"E1 Bearer Context Setup","summary":"Coordinate bearer context between gNB-CU-CP and gNB-CU-UP across E1.","steps":[["38.463","E1AP Bearer Context Setup / Modification","gNB-CU-CP ↔ gNB-CU-UP"],["38.401","CU-CP/CU-UP split architecture","NG-RAN architecture"],["38.413","PDU Session resource context from N2","AMF ↔ NG-RAN"],["29.281","GTP-U user-plane tunnel context","User plane"]],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3431"},{"id":"ntn-mobility","name":"NR-NTN Mobility Context","summary":"Trace Rel-17 NTN mobility context across 5GS architecture/procedures and NR radio control.","steps":[["23.501","5GS 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baseline"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-17","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/WorkItem/WorkItemDetails.aspx?workitemId=860046"},{"id":"isac","name":"Integrated Sensing and Communication","summary":"Emerging sensing functions spanning requirements, RAN and system architecture.","specs":["22.261","23.501","38.300"],"facets":["Requirements","Architecture","RAN","Sensing"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-19","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/WorkItem/WorkItemDetails.aspx?workitemId=950003"},{"id":"slicing","name":"Network Slicing","summary":"Slice selection, architecture, policy and UE/core signalling.","specs":["22.261","23.501","23.502","23.503","24.501"],"facets":["Requirements","Architecture","Procedure","Policy","NAS"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/WorkItem/WorkItemDetails.aspx?workitemId=760066"},{"id":"positioning","name":"Positioning","summary":"Location services, LPP and NR positioning protocol relationships.","specs":["23.273","37.355","38.455","38.331"],"facets":["LCS","LPP","NRPPa","RRC"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-16","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3577"},{"id":"ai-ml","name":"AI / ML and Analytics","summary":"Analytics and AI/ML-related system functions, including NWDAF.","specs":["23.288","23.501","29.500"],"facets":["Analytics","Architecture","SBI"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-16","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3579"},{"id":"redcap","name":"Reduced Capability (RedCap)","summary":"NR reduced-capability device support across radio architecture and protocol layers.","specs":["38.300","38.331","38.104","38.533"],"facets":["NR","RRC","RF","Conformance"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-17","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/WorkItem/WorkItemDetails.aspx?workitemId=900062"},{"id":"xr","name":"XR / Immersive Media","summary":"Extended-reality service requirements, media and QoS context.","specs":["22.261","23.501","23.503","26.114"],"facets":["Requirements","QoS","Media"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-18","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/WorkItem/WorkItemDetails.aspx?workitemId=990110"},{"id":"5gs-registration","name":"5GS Registration","summary":"Registration state, NAS signalling, NGAP context and authentication across UE, NG-RAN and 5GC.","specs":["23.501","23.502","24.501","38.413","38.331","33.501"],"facets":["Architecture","NAS","NGAP","RRC","Security"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/23502.htm"},{"id":"5gs-session-management","name":"5GS Session Management","summary":"PDU Session lifecycle, policy/QoS, SMF services and user-plane realization.","specs":["23.501","23.502","23.503","24.501","29.502","38.413","29.281"],"facets":["Architecture","Procedure","NAS","SBI","NGAP","User plane"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/23502.htm"},{"id":"5gs-mobility","name":"5GS Mobility","summary":"Mobility architecture and procedures spanning NAS, RRC, NGAP and XnAP.","specs":["23.501","23.502","24.501","38.300","38.331","38.413","38.423"],"facets":["Architecture","Procedure","NAS","RRC","NGAP","XnAP"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/23502.htm"},{"id":"qos","name":"5GS QoS","summary":"5GS QoS flows, policy, session management and radio-resource realization.","specs":["23.501","23.502","23.503","24.501","29.502","38.413","38.331"],"facets":["QoS 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NRF.","specs":["23.501","23.502","29.500","29.501","29.502","29.503","29.509","29.510","29.518"],"facets":["SBI","AMF","SMF","UDM","AUSF","NRF"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3340"}],"interfaces":[{"id":"n1","name":"N1","between":"UE ↔ AMF","protocol":"5GS NAS","specs":["24.501","23.502","23.501"],"procedures":["registration","pdu-session"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://www.3gpp.org/dynareport/24501.htm"},{"id":"n2","name":"N2","between":"NG-RAN ↔ 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gNB-DU","protocol":"F1AP","specs":["38.473","38.401"],"procedures":[],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3260"},{"id":"uu","name":"Uu","between":"UE ↔ NG-RAN","protocol":"RRC / NR lower layers","specs":["38.331","38.321","38.322","38.323","38.211"],"procedures":["registration","handover"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3197"},{"id":"sbi","name":"SBI","between":"5GC network functions","protocol":"HTTP-based service 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5GC.","specs":["24.501","38.331","31.102"],"interfaces":["n1","uu"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3144"},{"id":"gnb","name":"gNB","kind":"RAN","summary":"NR base station / NG-RAN node.","specs":["38.300","38.401","38.413","38.423","38.473"],"interfaces":["n2","n3","xn","f1","uu"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3219"},{"id":"amf","name":"AMF","kind":"5GC control plane","summary":"Access and Mobility Management 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Function.","specs":["23.501","29.510"],"interfaces":["sbi"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-15","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3144"},{"id":"nwdaf","name":"NWDAF","kind":"5GC analytics","summary":"Network Data Analytics Function.","specs":["23.288","23.501"],"interfaces":["sbi"],"provenance_type":"curated","review_state":"reviewed","valid_from_release":"Rel-16","valid_to_release":null,"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=3579"},{"id":"gnb-cu-cp","name":"gNB-CU-CP","kind":"NG-RAN control plane","summary":"Central-unit control-plane function terminating RRC and controlling CU-UP/DU 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