Foreword1 Scope2 References3 Definitions and abbreviations4 General5 E1AP services6 Services expected from signalling transport7 Functions of E1AP8 E1AP procedures8 E1AP procedures8.1 List of E1AP Elementary Procedures8.2 Interface Management procedures8.3 Bearer Context Management procedures8.4 Trace Procedures8.5 IAB Procedures8.6 MBS Procedures9 Elements for E1AP communication9 Elements for E1AP communication9.1 General9.2 Message Functional Definition and Content9.3 Information Element Definitions9.3.1 Radio Network Layer Related IEs9.3.2 Transport Network Layer Related IEs9.3.3 Container and List IE definitions9.4 Message and Information Element Abstract Syntax (with ASN.1)9.4.1 General9.4.2 Usage of private message mechanism for non-standard use9.4.3 Elementary Procedure Definitions9.4.4 PDU Definitions9.4.5 Information Element Definitions9.4.6 Common Definitions9.4.7 Constant Definitions9.4.8 Container Definitions10 Handling of unknown, unforeseen and erroneous protocol data 7 Functions of E1AP 37.4833GPPE1 Application Protocol (E1AP)Release 17TS Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM The functions of E1AP are described in TS 37.480 [3].