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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions and abbreviations
  • 4 General
  • 5 Transparent mode, version 1
  • 6 Support mode for predefined SDU sizes, version 2
    • 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 mode
    • 6.5 Elementary procedures
      • 6.5.1 Transfer of User Data procedure
      • 6.5.2 Initialisation procedure
      • 6.5.3 Iu Rate Control procedure
      • 6.5.4 Time Alignment procedure
      • 6.5.5 Handling of Error Event procedure
      • 6.5.6 Frame Quality Classification procedure
    • 6.6 Elements for Iu UP communication in Support mode
    • 6.7 Handling of unknown, unforeseen and erroneous protocol data
  • 7 Communication Primitives for the Iu UP protocol layer
  • 8 Evolution of Iu UP Protocol
  • B.1 Protocol state model for transparent mode
  • B.2 Protocol state model for support mode for predefined SDU sizes

6.3 Services Expected from the UP Data Transport layer

25.4153GPPRelease 17TSUTRAN Iu interface user plane protocols

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The Iu UP protocol layer in Support Mode expects the following services from the Transport Network Layer:

– Transfer of user data.

– Delivery of SDUs in sequence when requested by the RAB parameter Delivery Order IE (TS 25.413 [3]).