3 Abbreviations and definitions

22.0343GPPHigh Speed Circuit Switched Data (HSCSD)Stage 1TS

3.1 Abbreviations

For the purposes of the present document, the following abbreviations apply:

AIUR Air Interface User Rate

EDGE Enhanced Data rates for GSM Evolution

FNUR Fixed Network User Rate

GBS General Bearer Services

GERAN GSM/EDGE radio access network

HSCSD High Speed Circuit Switched Data

MO Mobile Originated

MT Mobile Terminated

NT Non Transparent

T Transparent

UE User Equipment (same as MS in GSM specifications)

Additional abbreviations can be found in TS 22.905 [1].

3.2 Definitions

For the purposes of the present document, the following terms and definitions apply:

Fixed Network User Rate: user rate between IWF and the fixed network.

Air Interface User Rate: user rate between Mobile Termination and IWF. For T services it is the maximum possible AIUR not including padding. For NT services it is the maximum possible AIUR.

maximum possible GERAN AIUR: highest possible GERAN AIUR that the multiple TCH/F can provide, e.g. 2 TCH/F using TCH/F9.6 provides a maximum possible AIUR of 19,2 kbit/s.

padding: fill bits needed to adapt the maximum possible AIUR supported by a given number of TCH/F with a given channel coding to a FNUR that is lower than the maximum possible AIUR.