ETSI TS 123 034 contains the stage 2 service description for a High Speed Circuit Switched Data (HSCSD) on
GSM/GERAN in A/Gb mode and Iu mode. HSCSD utilizes the multislot mechanism, i.e. using multiple traffic
channels (/bearers) for the communication.
Additionally, the present document specifies some HSCSD related requirements for multi system mobile stations
operating in UTRAN Iu mode. In UTRAN Iu mode one bearer can provide all needed data rates, and the multislot
mechanism is therefore not needed. However, for inter-system handover to GERAN, certain information has to be
provided by the mobile station during the service negotiation. The UTRAN Iu mode aspects concerning HSCSD are
described exclusively in clause 4.2.
In analogy with ITU-T Recommendation I.130 [6] (refer to annex A) and with reference of ITU-T Recommendation
Q.65 [7] VI.1 (Stage 2 of the method for characterization of services supported by an ISDN), the second stage of the
HSCSD is defined as follows.
Stage 2 identifies the functional capabilities and information flows needed to support the service as described in
3GPP TS 22.034 [9]. Furthermore, it identifies various possible physical locations for the functional capabilities. The
output of Stage 2, which is signalling system independent, is used as an input to Stage 3, the design of signalling system
and switching Recommendations.
| Edition : | 14.0.0 |
| File Size : | 1
file
, 170 KB |
| Note : | This product is unavailable in Russia, Ukraine, Belarus |
| Number of Pages : | 28 |
| Published : | 03/01/2017 |
