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TS 37.473RAN3
W1 Interface
Application Protocol (W1AP)

use "3GPP‑Page" to get the Word version
for a better overview, the Table of Contents (ToC) is reproduced
V16.0.0 (Wzip)2019/12  144 p.

Rapporteur:  Mr. Cao, Gen

The present document specifies the 5G radio network layer signalling protocol for the W1 interface. The W1 interface provides means for interconnecting a ng-eNB-CU and a ng-eNB-DU of a ng-eNB within an NG-RAN. The W1 Application Protocol (W1AP) supports the functions of W1 interface by signalling procedures defined in the present document. W1AP is developed in accordance to the general principles stated in TS 38.401 and TS 37.470.

full Table of Contents for  TS 37.473  Word version:   16.0.0

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1  ScopeWord-p. 10
2  References
3  Definitions of terms, symbols and abbreviationsWord-p. 11
4  General
5  W1AP servicesUp
6  Services expected from signalling transport
7  Functions of W1AP
8  W1AP proceduresWord-p. 14
8.1  List of W1AP Elementary procedures
8.2  Interface Management proceduresWord-p. 15
8.3  UE Context Management procedures
8.4  RRC Message Transfer proceduresUp
8.5  Warning Message Transmission Procedures
8.6  Paging proceduresWord-p. 36
9  Elements for W1AP Communication
9.1  General
9.2  Message Functional Definition and ContentWord-p. 37
9.2.1  Interface Management messagesUp
9.2.2  UE Context Management messages
9.2.3  RRC Message Transfer messages
9.2.4  Warning Message Transmission MessagesWord-p. 62
9.2.5  Paging messages
9.3  Information Element DefinitionsWord-p. 66
9.3.1  Radio Network Layer Related IEs
9.3.1.1  Message Type
9.3.1.2  Cause
9.3.1.3  PWS System InformationWord-p. 69
9.3.1.4  ng-eNB-CU UE W1AP ID
9.3.1.5  ng-eNB-DU UE W1AP IDUp
9.3.1.6  RRC-Container
9.3.1.7  SRB ID
9.3.1.8  DRB ID
9.3.1.9  ng-eNB-DU IDWord-p. 70
9.3.1.10  Served Cell Information
9.3.1.11  Transmission Action IndicatorWord-p. 72
9.3.1.12  E-UTRAN CGI
9.3.1.13  Repetition Period
9.3.1.14  PLMN IdentityWord-p. 73
9.3.1.15  Transmission BandwidthUp
9.3.1.16Void
9.3.1.17  E-UTRAN Frequency Info
9.3.1.18  ng-eNB-DU System InformationWord-p. 74
9.3.1.19  E-UTRAN QoS
9.3.1.20  Allocation and Retention Priority
9.3.1.21  GBR QoS InformationWord-p. 75
9.3.1.22  Bit Rate
9.3.1.23  Transaction IDWord-p. 76
9.3.1.24  DRX Cycle
9.3.1.25  RLC Mode
9.3.1.26  5GS TACUp
9.3.1.27  Configured EPS TAC
9.3.1.28  RRC Reconfiguration Complete IndicatorWord-p. 77
9.3.1.29  C-RNTI
9.3.1.30  RAT-Frequency Priority Information
9.3.1.31  Slice Support List
9.3.1.32  S-NSSAI
9.3.1.33  ng-eNB-CU System InformationWord-p. 78
9.3.1.34  QoS Flow Level QoS Parameters
9.3.1.35  GBR QoS Flow Information
9.3.1.36  Dynamic 5QI DescriptorWord-p. 79
9.3.1.37  NG-RAN Allocation and Retention Priority
9.3.1.38  Non Dynamic 5QI DescriptorWord-p. 80
9.3.1.39  Maximum Packet Loss RateWord-p. 81
9.3.1.40  Packet Delay Budget
9.3.1.41  Packet Error Rate
9.3.1.42  Averaging Window
9.3.1.43  Maximum Data Burst VolumeWord-p. 82
9.3.1.44  Notification Control
9.3.1.45  RAN Area Code
9.3.1.46  QoS Flow IdentifierUp
9.3.1.47  Available PLMN List
9.3.1.48  Service Status
9.3.1.49  RLC StatusWord-p. 83
9.3.1.50  RRC Delivery Status
9.3.1.51  QoS Flow Mapping Indication
9.3.1.52  Resource Coordination Transfer Information
9.3.1.53  E-UTRA PRACH ConfigurationWord-p. 84
9.3.1.54  Resource Coordination E-UTRA Cell Information
9.3.1.55  Extended Available PLMN ListWord-p. 86
9.3.1.56  Associated SCell ListUp
9.3.1.57  CU to DU RRC Information
9.3.1.58  DU to CU RRC InformationWord-p. 87
9.3.1.59  E-UTRA Transmission BandwidthWord-p. 88
9.3.1.60  Number of Broadcasts Requested
9.3.1.61  Criticality Diagnostics
9.3.1.62  Cell TypeWord-p. 89
9.3.1.63  UE Identity Index value
9.3.1.64  RAN UE Paging identity
9.3.1.65  CN UE Paging Identity
9.3.1.66  Paging DRXUp
9.3.2  Transport Network Layer Related IEs
9.4  Message and Information Element Abstract Syntax (with ASN.1)
9.5  Message Transfer SyntaxWord-p. 143
9.6  Timers
10  Handling of unknown, unforeseen and erroneous protocol data
A  Change HistoryWord-p. 144

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