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TechSpec
  • Foreword
  • 1 Scope
  • 2 References, abbreviations and definitions
  • 3 General approach
  • 4 The RA0 Function
  • 5 The RA1 Function
  • 5a The RA1' Function
  • 6 The RA1'' Function
  • 7 Split/Combine and Padding Functions
  • 8 The EDGE Multiplexing Function
  • 9 The Functions RA1/RA1' and RA1'/RA1"
  • 10 The Functions RA1'/RAA' and RA1'/RAA"
  • 11 THE RAA' FUNCTION
  • 12 THE RAA'' FUNCTION
  • 12a The RAE Function
  • 13 The RA2 Function
  • 14 The A-interface Multiplexing Function
  • 15 Support of non-transparent bearer services in A/Gb mode
  • 15a Support of non-transparent bearer services in Iu mode
  • 16 Support of transparent bearer services in A/Gb mode
  • 16a Support of transparent bearer services in Iu mode
  • 17 Frame Formats
  • A.1 Special cases
  • A.2 False Z sequence detection

5a The RA1′ Function

3GPP48.020Rate adaption on the Base Station System - Mobile-services Switching Centre (BSS - MSC) interfaceRelease 17TS

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

The RA1′ function is used to adapt between the synchronous data rates and the radio interface rates, i.e. it maps the data provided in the Iu UP SDUs into modified V.110 60 bit frame structure. It is specified in 3GPP TS 44.021.

In the BSS, the RA1′ function is only applicable in GERAN Iu mode if TCH/F9.6 channel coding is used.