Content for TS 25.415 Word version: 16.0.0
3 Definitions and abbreviations
4 General
5 Transparent mode, version 1
6 Support mode for predefined SDU sizes, version 2
7 Communication Primitives for the Iu UP protocol layer
8 Evolution of Iu UP Protocol
A Illustration of usage of RFCI for AMR speech RAB
B Illustration of protocol states in the Iu UP
C Open Issues of the Iu UP
D Distributed rate decision within RNC
$ Change History
3 Definitions and abbreviations Word‑p. 8
4 General
5 Transparent mode, version 1 Word‑p. 13
5.1 General
5.1.1 Operation of the Iu UP in Transparent mode
5.1.2 Interfaces of the Iu UP protocol layer in Transparent mode Word‑p. 14
5.2 Iu UP Protocol layer Services in Transparent mode
5.3 Services Expected from the UP Data Transport layer
5.4 Elements for Iu UP communication in Transparent mode
6 Support mode for predefined SDU sizes, version 2
6.1 General
6.1.1 Operation of the Iu UP in Support mode
6.1.2 Interfaces of the Iu UP protocol layer in Support mode Word‑p. 15
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 mode Word‑p. 16
6.4.1 Functional model of the Iu UP Protocol Layer in Support mode
6.4.2 Frame Handler function
6.4.3 Procedure Control functions
6.4.4 Non Access Stratum Data Streams specific function(s) Word‑p. 17
6.5 Elementary procedures
6.5.1 Transfer of User Data procedure
6.5.2 Initialisation procedure Word‑p. 20
6.5.3 Iu Rate Control procedure
6.5.3.1 Successful operation
6.5.3.2 Unsuccessful operation Word‑p. 23
6.5.3.2A Frequent Rate Control Procedures |R4| Word‑p. 24
6.5.4 Time Alignment procedure Word‑p. 25
6.5.5 Handling of Error Event procedure Word‑p. 27
6.5.6 Frame Quality Classification procedure Word‑p. 28
6.6 Elements for Iu UP communication in Support mode
6.6.1 General
6.6.2 Frame Format for predefined size SDUs Word‑p. 29
6.6.2.1 PDU Type 0
6.6.2.2 PDU Type 1 Word‑p. 30
6.6.2.3 PDU Type 14 Word‑p. 31
6.6.2.3.1 General
6.6.2.3.2 Positive Acknowledgement Word‑p. 32
6.6.2.3.3 Negative Acknowledgement Word‑p. 33
6.6.2.3.4 Procedures Coding Word‑p. 34
6.6.3 Coding of information elements in frames Word‑p. 37
6.6.3.1 PDU Type
6.6.3.2 Ack/Nack
6.6.3.3 Frame Number Word‑p. 38
6.6.3.4 PDU Type 14 Frame Number
6.6.3.5 Frame Quality Classification (FQC)
6.6.3.6 RAB sub-Flow Combination Indicator (RFCI) Word‑p. 39
6.6.3.7 Procedure Indicator
6.6.3.8 Header CRC
6.6.3.9 Payload CRC
6.6.3.10 Chain Indicator
6.6.3.11 Number of Subflows per RFCI
6.6.3.12 Length Indicator (LI)
6.6.3.13 Number of RFCI Indicators Word‑p. 40
6.6.3.14 RFCI n Indicator
6.6.3.15 Error distance
6.6.3.16 Error Cause value
6.6.3.17 Padding Word‑p. 41
6.6.3.18 Time alignment
6.6.3.19 Spare
6.6.3.20 Spare extension
6.6.3.21 LRI, Last RFCI Indicator
6.6.3.22 Length of subflow Word‑p. 42
6.6.3.23 TI
6.6.3.24 IPTI of nth RFCI
6.6.3.25 Iu UP Mode versions supported
6.6.3.26 Iu UP Mode Version
6.6.3.27 Payload fields
6.6.3.28 Data PDU type Word‑p. 43
6.6.4 Timers
6.6.5 Maximum values of repetition counters
6.7 Handling of unknown, unforeseen and erroneous protocol data
7 Communication Primitives for the Iu UP protocol layer
7.1 Modelling Principle
7.2 Primitives towards the upper layers at the RNL SAP
7.2.1 General
7.2.2 Iu-UP-DATA-REQUEST Word‑p. 49
7.2.3 Iu-UP-DATA-INDICATION Word‑p. 50
7.2.4 Iu-UP-STATUS-REQUEST
7.2.5 Iu-UP-STATUS-INDICATION
7.2.6 Iu-UP-UNIT-DATA-REQUEST
7.2.7 Iu-UP-UNIT-DATA-INDICATION
7.3 Primitives towards the transport layers at TNL SAP
8 Evolution of Iu UP Protocol Word‑p. 52
A Illustration of usage of RFCI for AMR speech RAB Word‑p. 55
B Illustration of protocol states in the Iu UP Word‑p. 58
B.1 Protocol state model for transparent mode
B.2 Protocol state model for support mode for predefined SDU sizes Word‑p. 59
C Open Issues of the Iu UP Word‑p. 61
D Distributed rate decision within RNC |R4| Word‑p. 62
$ Change History Word‑p. 63
