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TS 38.463 (RAN3)
NG-RAN — E1 interface
E1 Application Protocol (E1AP)

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V15.5.0 (PDF)2019/09  179 p.

Rapporteur:  Dr. Fiorani, Matteo

The present document specifies the 5G radio network layer signalling protocol for the E1 interface. The E1 interface provides means for interconnecting a CU‑CP and a CU‑UP of a gNB within an NG‑RAN, or for interconnecting a CU‑CP and a CU‑UP of an en‑gNB within an E‑UTRAN. The E1 Application Protocol (E1AP) supports the functions of E1 interface by signalling procedures defined in the present document.

full Table of Contents for  TS 38.463  Word version:   15.5.0


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1  ScopeWord-p. 9
2  References
3  Definitions and abbreviationsWord-p. 10
4  General
5  E1AP services
6  Services expected from signalling transportUp
7  Functions of E1AP
8  E1AP proceduresWord-p. 13
8.1  List of E1AP Elementary Procedures
8.2  Interface Management proceduresWord-p. 14
8.3  Bearer Context Management procedures
8.3.1  Bearer Context Setup
8.3.2  Bearer Context Modification (gNB-CU-CP initiated)
8.3.3  Bearer Context Modification Required (gNB-CU-UP initiated)Word-p. 33
8.3.4  Bearer Context Release (gNB-CU-CP initiated)Up
8.3.5  Bearer Context Release Request (gNB-CU-UP initiated)
8.3.6  Bearer Context Inactivity Notification
8.3.7  DL Data NotificationWord-p. 36
8.3.8  Data Usage Report
8.3.9  gNB-CU-UP Counter CheckUp
8.3.10  UL Data Notification
8.3.11  MR-DC Data Usage Report
9  Elements for E1AP communicationWord-p. 39
9.1  General
9.2  Message Functional Definition and Content
9.2.1  Interface Management messages
9.2.2  Bearer Context Management messages
9.3  Information Element Definitions
9.3.1  Radio Network Layer Related IEs  Message Type  Cause  Criticality DiagnosticsWord-p. 61  gNB-CU-CP UE E1AP IDWord-p. 62  gNB-CU-UP UE E1AP ID  Time To waitWord-p. 63  PLMN Identity  Slice Support List  S-NSSAI  Security Information  Cell Group InformationWord-p. 64  QoS Flow List  UP Parameters  NR CGIWord-p. 65  gNB-CU-UP ID  DRB IDUp  E-UTRAN QoS  E-UTRAN Allocation and Retention PriorityWord-p. 66  GBR QoS Information  Bit RateWord-p. 67  PDU Session ID  PDU Session Type  Security IndicationWord-p. 68  QoS Flow Identifier  QoS Flow QoS Parameters List  QoS Flow Level QoS ParametersUp  Non Dynamic 5QI DescriptorWord-p. 69  Dynamic 5QI Descriptor  NG-RAN Allocation and Retention PriorityWord-p. 70  GBR QoS Flow InformationWord-p. 71  Security AlgorithmWord-p. 72  User Plane Security Keys  UL Configuration  gNB-CU-UP Cell Group Related ConfigurationWord-p. 73  PDCP Count  NR CGI Support ListWord-p. 74  QoS Parameters Support List  PDCP Configuration  SDAP ConfigurationWord-p. 75  ROHC ParametersWord-p. 76  T-Reordering Timer  Discard Timer  UL Data Split ThresholdWord-p. 77  Data Usage Report List  Flow Failed ListWord-p. 78  Packet Loss RateWord-p. 79  Packet Delay Budget  Packet Error Rate  Averaging Window  Maximum Data Burst Volume  Priority Level  Security ResultWord-p. 80  Transaction ID  Inactivity timer  Paging Priority Indicator (PPI)  gNB-CU-UP CapacityUp  PDCP SN Status InformationWord-p. 81  QoS Flow Mapping List  QoS Flow Mapping IndicationWord-p. 82  PDCP SN Size  Network Instance  MR-DC Usage Information  MR-DC Data Usage Report ListWord-p. 83  gNB-DU IDWord-p. 84  Common Network Instance  Activity Notification LevelWord-p. 85
9.3.2  Transport Network Layer Related IEs
9.3.3  Container and List IE definitions
9.4  Message and Information Element Abstract Syntax (with ASN.1)Word-p. 103
10  Handling of unknown, unforeseen and erroneous protocol dataWord-p. 177
A  Change HistoryWord-p. 178

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