7 Other technical specifications on the BSC-BTS interface
3GPP48.051Base Station Controller - Base Transceiver Station (BSC - BTS) interfaceGeneral AspectsRelease 17TS
The full structure of the Technical Specifications specifying the BSC to BTS interface are as follows:
7.1 3GPP TS 48.052 BSC-BTS Interface Principles
3GPP TS 48.052 gives the principle basis for the rest of the specifications specifying the interface between the base station controller and the base transceiver station. It gives the functional split between these two entities.
7.2 3GPP TS 48.054 BSC-BTS Layer 1 Specification
3GPP TS 48.054 defines the structure of the physical layer at the BSC – BTS interface. The physical interface is either chosen as 2 048 kbit/s or as 64 kbit/s, both according to standard ITU-T recommendations.
Depending on location of transcoders, speech is standard A-law or it is 16 kbit/s remote control protocol multiplexed or rate adapted to 64 kbit/s in the same way as data.
7.3 3GPP TS 48.056 BSC-BTS Layer 2 Specification
At layer 2 the signalling information is passed by a standard LAPD protocol mechanism in accordance with the ITU-T Recommendations Q.920 and Q.921.
7.4 3GPP TS 48.058 BSC-BTS Layer 3 Specification
3GPP TS 48.058 specifies the layer 3 procedures used on the BSC-BTS interface for control of the GSM services. The functional split between BSC and BTS is defined in Technical Specification 3GPP TS 48.052.
7.5 3GPP TS 12.21 BSC-BTS Operation/Maintenance Signalling
3GPP TS 12.21 defines the transport mechanism for O&M messages over the Abis interface. O&M procedures and messages are defined in 3GPP TS 12 series.
7.6 3GPP TS 48.060 Inband Control of Remote Transcoders and Rate Adaptors
The transcoder is a part of the BSS and may optionally be located outside the BTS (e.g. at MSC-site or at BSC-site) in order to make it possible to multiplex speech and data channels on the links within the BSS and on the BSC-BTS link.
3GPP TS 48.060 describes the protocol which carries the full rate speech and data frames between the transcoder and the radio link codec across a 16 kbit/sec interface. Both full rate speech and full rate data services are covered. It also defines the signals needed for remote controlling the timing of the transcoder in accordance to the transmission time at the radio link. It also addresses the signals for voice activity and comfort noise. It interfaces the 06- series to the 05‑series.
7.7 3GPP TS 48.061 Inband Control of Remote Transcoders and Rate Adaptors for Half Rate Traffic Channels
3GPP TS 48.061 describes the protocol which carries the half rate speech and data frames between the transcoder and the radio link codec across a 16 kbit/s or an 8 kbit/s interface. Both half rate speech and half rate data services are covered. It also defines the signals needed for remote controlling the timing of the transcoder in accordance to the transmission time at the radio link. It also addresses the signals for voice activity and comfort noise.
Annex A (informative):
Change History
|
TSG # |
TSG Doc. |
CR |
Rev |
Subject/Comment |
New |
|
January 2016 |
– |
– |
– |
Rel-13 version created based on v12.0.0 |
13.0.0 |
|
Change history |
|||||||
|
Date |
Meeting |
TDoc |
CR |
Rev |
Cat |
Subject/Comment |
New version |
|
2017-03 |
RP-75 |
Version for Release 14 (frozen at TSG-75) |
14.0.0 |
||||
|
2018-06 |
RP-80 |
– |
– |
– |
– |
Update to Rel-15 version (MCC) |
15.0.0 |
|
2020-07 |
RP-88e |
– |
– |
– |
– |
Upgrade to Rel-16 version without technical change |
16.0.0 |
|
2022-03 |
RP-95e |
– |
– |
– |
– |
Upgrade to Rel-17 version without technical change |
17.0.0 |