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TS 08.20 (CT3)
Rate Adaptation on the Base Station System - Mobile Service Switching Centre (BSS-MSC) Interface

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(P) GSM Rel-99 v8.4.1    2001/04    27 p.
(P) GSM Rel-98 v7.1.0    2001/04    26 p.
(P) GSM Rel-97 v6.1.0    2001/04    26 p.
(P) GSM Rel-96 v5.4.0    2001/04    27 p.
(W-zip) GSM Phase-2 v4.2.3    1995/01    12 p.
(P) GSM Phase-1 v3.1.2    1992/02    7 p.

Rapporteur:  RÄSÄNEN, Juha
Descendant(s):  TS 48.020    

This TS defines rate adaptation functions to be used in GSM 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 accordance with TS 03.10.

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 TS.
  • This TS should be considered together with TS 04.21 to give a complete description of PLMN rate adaptation.


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1   Scope   PDF-p. 6
2   References, abbreviations and definitions
3   General approach
4   The RA0 Function
5   The RA1 Function
6   The RA1'' Function   PDF-p. 8
7   Split/Combine and Padding Functions
8   The EDGE Multiplexing Function
9   The RA1/RA1' Function   PDF-p. 9
13   The RA2 Function
14   The A-interface Multiplexing Function
15   Support of non-transparent bearer services   PDF-p. 15
16   Support of transparent bearer services
17   Frame Formats   PDF-p. 21
A   Frame Pattern Substitution   PDF-p. 23
B   Change History   PDF-p. 25

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