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TS 08.61














In-band control of remote transcoders and rate adaptors for half rate traffic channels

(P) GSM Rel-99 v8.1.0    2002/02    43 p.
(P) GSM Rel-98 v7.3.0    2002/02    45 p.
(P) GSM Rel-97 v6.0.1    1998/11    34 p.
(P) GSM Rel-96 v5.0.1    1996/11    36 p.
(P) GSM Phase-2 v4.0.2    1995/11    39 p.

Rapporteur:  ANDERSEN, Niels Peter Skov
Descendant(s):  TS 48.061    

This TS describes the protocol between the Base Transceiver Station (BTS) and the remote Transcoder/Rate Adaption Unit (TRAU) for speech and data on half rate traffic channel (TCH/H).

For Half Rate speech and half rate data the protocol is specified for 8 kbit/s and 16 kbit/s submultiplexing scheme.

For Adaptive Multi-Rate speech this TS specifies the 8 kBit/s submultiplexing, both for the full and the half rate traffic channels (TCH/AFS and TCH/AHS). The specification for 16 kBit/s submultiplexing is given in TS 08.60, both for the full and the half rate traffic channels (TCH/AFS and TCH/AHS).

This TS should be considered together with the GSM 06 series, TS 04.21 (Rate Adaption on the MS BSS Interface) and TS 08.20 (Rate Adaption on the BTS/MSC Interface).

1   Scope   PDF-p. 6
2   References
3   Definitions and abbreviations   PDF-p. 7
4   General approach   PDF-p. 8
5   Frame structure   PDF-p. 10
5.1   16 kbit/s submultiplexing
5.2   8 kbit/s submultiplexing      Up
6   Procedures
6.1   Remote Control of Transcoders and Rate Adaptors
6.2   Resource Allocation   PDF-p. 25
6.3   Resource Release
6.4   In Call Modification
6.5   Transfer of Idle Frames, Handling of missing data   PDF-p. 26
6.6   Procedures for Speech Frames
6.7   Procedures for Data Frames
6.8   Frame Synchronization
6.9   Correction/detection of bit errors
6.10   Procedures for Operation & Maintenance
A   Change History   PDF-p. 41      Up