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TS 25.415 (RAN3)
UTRAN – Iu interface –
User Plane protocols

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V15.0.0 (PDF)2018/06  62 p.
V14.0.0  2017/03  65 p.
V13.0.0  2015/12  65 p.
V12.0.0  2014/09  65 p.
V11.0.0  2012/09  65 p.
V10.1.0  2011/06  65 p.
V9.0.1  2011/04  65 p.
V8.0.0  2009/01  65 p.
V7.3.0  2006/12  66 p.
V6.3.0  2006/06  65 p.
V5.5.0  2005/03  65 p.
V4.7.0  2003/01  64 p.
V3.12.0  2002/09  59 p.

Rapporteur:  Mr. Israelsson, Martin
See also:  –

This TS defines the Radio Network Layer user plane protocol being used over the Iu interface.

The Iu UP protocol is located in the User plane of the Radio Network layer over the Iu interface: the Iu UP protocol layer. The Iu UP protocol is used to convey user data associated to Radio Access Bearers. One Iu UP protocol instance is associated to one RAB and one RAB only. If several RABs are established towards one given UE, then these RABs make use of several Iu UP protocol instances.


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1  Scope [R3]PDF-p. 7
2  References [R3]
3  Definitions and abbreviations [R3]PDF-p. 8
4  General [R3]
5  Transparent mode, version 1 [R3]PDF-p. 13
6  Support mode for predefined SDU sizes, version 2 [R3]
6.1  General
6.2  Iu UP Protocol layer Services in Support mode
6.3  Services Expected from the UP Data Transport layer
6.4  Functions of the Iu UP Protocol Layer in Support modePDF-p. 16
6.5  Elementary procedures
6.6  Elements for Iu UP communication in Support mode
6.7  Handling of unknown, unforeseen and erroneous protocol data

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