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draft-TS 38.423 (RAN3)
NG-RAN – Xn Application Protocol (XnAP)

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(W-zip) V0.1.1    2017/06    53 p.

Rapporteur:  Mr. Vesely, Alexander
See also:  –

The present document specifies the radio network layer signalling procedures of the control plane between gNBs in NG RAN. XnAP supports the functions of Xn interface by signalling procedures defined in this document. XnAP is developed in accordance to the general principles stated in TS 38.401 and TS 38.420.


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1   Scope   Word-p. 7
2   References
3   Definitions, symbols and abbreviations
4   General
5   XnAP services   Word-p. 9      Up
6   Services expected from signalling transport
7   Functions of XnAP
8   XnAP procedures   Word-p. 10
8.1   Elementary procedures
8.2   Basic mobility procedures   Word-p. 11
8.3   Procedures for Dual Connectivity
8.4   Global procedures   Word-p. 25
9   Elements for XnAP Communication
9.0   General      Up
9.1   Message Functional Definition and Content
9.2   Information Element definitions   Word-p. 48
9.3   Message and Information Element Abstract Syntax (with ASN.1)   Word-p. 52
9.4   Message transfer syntax   Word-p. 53
9.5   Timers
10   Handling of unknown, unforeseen and erroneous protocol data
A   Change history

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