3GPP API's

3GPP Application Programming Interfaces (API's) are pre-compiled and optimized C function libraries for encoding and decoding protocol messages defined within 3GPP standards documents

API's are available for ASN.1-based protocols for 5G (New Radio) (LTE-NR-RRC, E1AP, F1AP, NGAP, XnAP, NRPPa) and LTE (Long Term Evolution) (EUTRA-RRC, S1AP, X2AP, M2AP, M3AP).

API's are also available for other (non-ASN.1) Layer 3 protocols for LTE/5GS (NAS), UTRAN, and GERAN.

NAS & non ASN.1 API's

5G NR ASN.1 API's

4G LTE ASN.1 API's

Non-Access Stratum (NAS) LTE and 5GS, and GERAN-RRC

3GPP TS 24.007 24.008 24.011 24.301 24.501 44.018

Mobile radio interface signalling layer 3; General Aspects, Core network protocols, RRC, and SMS

NAS/RRC add-on for ASN1C SDK

This add-on allows C code to be generated for encoding and decoding 3GPP protocols defined in the above specifications.

NAS/RRC standalone C-based DLL with security handling

This DLL provides a C language API for encoding and decoding 3GPP protocols defined in the above specifications.

NAS/RRC add-on documentation

5G New Radio (NR) LTE API's

NOTE: The packages below should be unzipped in the c subdirectory of your ASN1C installation.

3GPP TS 38.331

New Radio (NR); Radio Resource Control (RRC); Protocol specification.

	LTE-RRC NR Release 15 C API (v15.12)	Windows	Linux
	LTE-RRC NR Release 16 C API (v16.3)	Windows	Linux

3GPP TS 38.463

New Radio (NR); E1 Application Protocol (E1AP)

	E1AP Release 15 C API (v15.7)	Windows	Linux
	E1AP Release 16 C API (v16.4)	Windows	Linux

3GPP TS 38.473

New Radio (NR); F1 Application Protocol (F1AP)

	F1AP Release 15 C API (v15.12)	Windows	Linux
	F1AP Release 16 C API (v16.4)	Windows	Linux

3GPP TS 38.413

New Radio (NR); NG Application Protocol (NGAP)

	NGAP Release 15 C API (v15.10)	Windows	Linux
	NGAP Release 16 C API (v16.4)	Windows	Linux

3GPP TS 38.423

New Radio (NR); Xn Application Protocol (XnAP)

	XnAP Release 15 C API (v15.10)	Windows	Linux
	XnAP Release 16 C API (v16.4)	Windows	Linux

3GPP TS 38.455

New Radio (NR); Positioning Protocol A (NRPPa)

	NRPPa Release 15 C API (v15.3)	Windows	Linux
	NRPPa Release 16 C API (v16.2)	Windows	Linux

LTE API's

NOTE: The packages below should be unzipped in the c subdirectory of your ASN1C installation.

3GPP TS 36.331

Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification.

LTE-RRC Release 14 C API (v14.16)	Windows	Linux
LTE-RRC Release 15 C API (v15.12)	Windows	Linux
LTE-RRC Release 16 C API (v16.3)	Windows	Linux

3GPP TS 36.413

Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP)

S1AP Release 14 C API (v14.9)	Windows	Linux
S1AP Release 15 C API (v15.9)	Windows	Linux
S1AP Release 16 C API (v16.4)	Windows	Linux

3GPP TS 36.423

Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP)

X2AP Release 14 C API (v14.8)	Windows	Linux
X2AP Release 15 C API (v15.10)	Windows	Linux
X2AP Release 16 C API (v16.4)	Windows	Linux

3GPP TS 36.443

Evolved Universal Terrestrial Radio Access Network (E-UTRAN); M2 Application Protocol (M2AP)

M2AP Release 14 C API (v14.1)	Windows	Linux
M2AP Release 15 C API (v15.0)	Windows	Linux
M2AP Release 16 C API (v16.1)	Windows	Linux

3GPP TS 36.444

Evolved Universal Terrestrial Radio Access Network (E-UTRAN); M3 Application Protocol (M3AP)

M3AP Release 14 C API (v14.1)	Windows	Linux
M3AP Release 15 C API (v15.0)	Windows	Linux
M3AP Release 16 C API (v16.0)	Windows	Linux