3GPP Long Term Evolution (LTE) Application Programming Interfaces (API's) are pre-compiled and optimized C function libraries for encoding and decoding protocol messages defined within 3GPP standards documents that define ASN.1-based messages (EUTRA-RRC, S1AP, and X2AP) or Layer-3 messages (NAS).
API's are also available for older, 3G standard ASN.1-based API's such as NBAP, RANAP, RNSAP and RRC.
Non-Access Stratum (NAS) LTE and 3G API's
3GPP TS
Mobile radio interface signalling layer 3; General Aspects, Core network protocols, and SMS
NAS standalone C-based DLL with security handling |