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TS 48.020CT3
Rate adaption on the BSS-MSC interface

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V14.0.0  2017/03  33 p.
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V6.0.0  2005/01  33 p.
V5.2.0  2003/01  33 p.
V4.1.0  2002/09  31 p.
GSM Rel-99 v8.4.1  2001/04  27 p.
GSM Rel-98 v7.1.0  2001/04  26 p.
GSM Rel-97 v6.1.0  2001/04  26 p.
GSM Rel-96 v5.4.0  2001/04  27 p.
GSM Phase-2 v4.2.3  1995/01  12 p.
GSM Phase-1 v3.1.2  1992/02  7 p.

Rapporteur:  Dr. Belling, Thomas

The present document defines rate adaptation functions to be used in PLMN Base Station Systems (BSS) transcoders and IWF
  • for adapting radio interface data rates to the 64 kbit/s used at the A-interface in A/Gb mode and
  • for adapting radio interface data rates to the Iu interface in GERAN Iu mode in accordance with TS 43.010.
The number of Base Station System - Mobile-services Switching Centre (BSS - MSC) traffic channels supporting data rate adaptation may be limited. In this case some channels may not support data rate adaptation. Those that do, shall conform to this specification.
NOTE: This specification should be considered together with TS 44.021 to give a complete description of PLMN rate adaptation.

full Table of Contents for  TS 48.020  Word version:   15.0.0

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1  ScopeWord-p. 6
2  References, abbreviations and definitions
3  General approach
4  The RA0 Function
5  The RA1 Function
5a  The RA1' FunctionWord-p. 8
6  The RA1'' Function
7  Split/Combine and Padding Functions
8  The EDGE Multiplexing FunctionWord-p. 10
9  The Functions RA1/RA1' and RA1'/RA1"Word-p. 11
10  The Functions RA1'/RAA' and RA1'/RAA"Word-p. 12
12a  The RAE FunctionWord-p. 16
13  The RA2 Function
14  The A-interface Multiplexing FunctionWord-p. 17
15  Support of non-transparent bearer services in A/Gb mode
15a  Support of non-transparent bearer services in Iu modeWord-p. 20
16  Support of transparent bearer services in A/Gb modeUp
16a  Support of transparent bearer services in Iu modeWord-p. 23
17  Frame Formats
A  Frame Pattern SubstitutionWord-p. 28
B  Change HistoryWord-p. 31

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