S1AP Messages
S1AP handles control signaling between LTE eNBs and the MME over the S1-MME interface.
Use this area for LTE core-facing access signaling and UE context procedures.
Search the 3GPP Message Database
Search across message titles, summaries, protocols, keywords, related procedures, and information element names. The search index is generated at build time, so the site stays static and easy to scale.
Filter and Browse
Search within this protocol family and narrow the list by direction or network. The results below update inside this section.
All Messages in This Category
This is the full published list for the S1AP category. Use the filter section above for a narrower interactive view.