ETSI TS 148 058 V13.1.0 (2016-04)

ETSI TS 1148 058 V13.1.0 (201616-04)

TECHNICAL SPECIFICATIONION
Digital cellular telecommmmunications system (Phase e 2+) (GSM);
Basese Station Controller -
Base Transceivveerr Station (BSC - BTS) Interfarface;
Layayer 3 specification
(3GPP TS 48.0.058 version 13.1.0 Release 13 13)

R
GLOBAL SYSTTEME FOR
MOBILE COMMUUNNICATIONS
3GPP TS 48.058 version 13.1.0 Release 13 1 ETSI TS 148 058 V13.1.0 (2016-04)

Reference
RTS/TSGG-0248058vd10
Keywords
GSM
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ETSI
3GPP TS 48.058 version 13.1.0 Release 13 2 ETSI TS 148 058 V13.1.0 (2016-04)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
3GPP TS 48.058 version 13.1.0 Release 13 3 ETSI TS 148 058 V13.1.0 (2016-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
1.1 References . 8
1.2 Abbreviations . 9
2 Protocol model . 9
3 Radio Link Layer Management Procedures . 10
3.1 Link establishment indication. 10
3.2 Link establishment request . 11
3.3 Link release indication . 11
3.4 Link release request . 11
3.5 Transmission of a transparent L3-Message in acknowledged mode . 12
3.6 Reception of a transparent L3-Message in acknowledged mode. 12
3.7 Transmission of a transparent L3-Message in unacknowledged mode . 12
3.8 Reception of a transparent L3-Message in unacknowledged mode . 12
3.9 Link error indication . 13
Dedicated channel management procedures . 13
4.1 Channel activation . 13
4.1.1 Signalling Procedure . 13
4.1.2 Activation for Intra-Cell Channel Change . 14
4.1.3 Activation for Asynchronous Handover . 15
4.1.4 Activation for Synchronous Handover . 15
4.1.5 Activation for Secondary Channels in Multislot Configuration . 15
4.1.6 Channel reactivation . 15
4.2 Channel MODE MODIFY . 16
4.3 Handover detection. 16
4.4 Start of encryption . 17
4.5 Measurement reporting . 17
4.5.1 Basic measurement reporting . 18
4.5.2 Measurement pre-processing . 18
4.5.2.1 Pre-processing configuration. 19
4.5.2.2 Pre-processed measurement reporting. 19
4.5.3 Extended measurement reporting . 19
4.6 Deactivate SACCH. 20
4.7 Radio channel release . 20
4.8 MS power control . 20
4.9 Transmission power control . 21
4.10 Connection failure . 22
4.11 Physical context request . 22
4.12 SACCH information modify . 22
4.13 Talker detection . 23
4.14 Listener detection . 23
4.15 Remote Codec Configuration . 23
4.16 Round Trip Delay Report . 23
4.17 Pre-handover Warning . 24
4.18 MultiRate Codec Configuration Change . 24
4.19 MultiRate Codec Configuration Change Performed . 25
4.20 TFO Report . 25
4.21 TFO Modification Request . 25
5 Common channel management procedures . 26
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5.1 Channel request by MS . 26
5.2 Paging . 26
5.3 Delete indication . 26
5.4 CCCH load indication . 27
5.5 Broadcast information modify . 27
5.6 Short Message Cell Broadcast . 27
5.7 IMMEDIATE ASSIGNMENT . 30
5.8 Notification. 31
6 TRX management procedures . 31
6.1 Radio resource indication . 31
6.2 SACCH filling information modify . 32
6.3 Flow control . 32
6.4 Error reporting . 33
6a Location services procedures . 33
6a.1 LLP message transport . 33
7 Error handling . 34
7.1 General . 34
7.2 Message discriminator error . 34
7.3 Message type error . 34
7.4 Message sequence error . 34
7.5 General information element errors . 34
7.6 Mandatory information element errors . 34
7.7 Optional information element errors . 35
7.8 Conditional information element errors . 35
8 Message formats and contents . 35
8.0 General . 35
8.1 Transparent messages . 36
8.2 Non-transparent messages (BSC-BTS specific messages) . 36
8.3 Radio link layer management messages . 36
8.3.1 DATA REQUEST . 37
8.3.2 DATA INDICATION . 37
8.3.3 ERROR INDICATION . 37
8.3.4 ESTABLISH REQUEST . 37
8.3.5 ESTABLISH CONFIRM . 38
8.3.6 ESTABLISH INDICATION . 38
8.3.7 RELEASE REQUEST . 38
8.3.8 RELEASE CONFIRM . 38
8.3.9 RELEASE INDICATION . 39
8.3.10 UNIT DATA REQUEST . 39
8.3.11 UNIT DATA INDICATION . 39
8.4 DEDICATED CHANNEL MANAGEMENT MESSAGES . 39
8.4.1 CHANNEL ACTIVATION . 40
8.4.2 CHANNEL ACTIVATION ACKNOWLEDGE . 41
8.4.3 CHANNEL ACTIVATION NEGATIVE ACKNOWLEDGE . 41
8.4.4 CONNECTION FAILURE INDICATION . 42
8.4.5 DEACTIVATE SACCH . 42
8.4.6 ENCRYPTION COMMAND . 42
8.4.7 HANDOVER DETECTION . 42
8.4.8 MEASUREMENT RESULT . 42
8.4.9 MODE MODIFY . 43
8.4.10 MODE MODIFY ACKNOWLEDGE . 43
8.4.11 MODE MODIFY NEGATIVE ACKNOWLEDGE . 44
8.4.12 PHYSICAL CONTEXT REQUEST . 44
8.4.13 PHYSICAL CONTEXT CONFIRM . 44
8.4.14 RF CHANNEL RELEASE . 44
8.4.15 MS POWER CONTROL . 44
8.4.16 BS POWER CONTROL . 45
8.4.17 PREPROCESS CONFIGURE . 45
8.4.18 PREPROCESSED MEASUREMENT RESULT . 45
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8.4.19 RF CHANNEL RELEASE ACKNOWLEDGE . 45
8.4.20 SACCH INFO MODIFY . 45
8.4.21 TALKER DETECTION . 46
8.4.22 LISTENER DETECTION . 46
8.4.23 REMOTE CODEC CONFIGURATION REPORT . 46
8.4.24 ROUND TRIP DELAY REPORT . 47
8.4.25 PRE-HANDOVER NOTIFICATION . 47
8.4.26 MULTIRATE CODEC MODIFICATION REQUEST . 47
8.4.27 MULTIRATE CODEC MODIFICATION ACKNOWLEDGE . 47
8.4.28 MULTIRATE CODEC MODIFICATION NEGATIVE ACKNOWLEDGE . 47
8.4.29 MULTIRATE CODEC MODIFICATION PERFORMED . 48
8.4.30 TFO REPORT . 48
8.4.31 TFO MODIFICATION REQUEST . 48
8.5 COMMON CHANNEL MANAGEMENT MESSAGES . 48
8.5.1 BCCH INFORMATION . 49
8.5.2 CCCH LOAD INDICATION . 49
8.5.3 CHANNEL REQUIRED . 50
8.5.4 DELETE INDICATION . 50
8.5.5 PAGING COMMAND . 50
8.5.6 IMMEDIATE ASSIGN COMMAND . 50
8.5.7 SMS BROADCAST REQUEST . 51
8.5.8 SMS BROADCAST COMMAND . 51
8.5.9 CBCH LOAD INDICATION . 51
8.5.10 NOTIFICATION COMMAND . 52
8.6 TRX MANAGEMENT MESSAGES . 52
8.6.1 RF RESOURCE INDICATION . 52
8.6.2 SACCH FILLING . 53
8.6.3 OVERLOAD . 53
8.6.4 ERROR REPORT . 53
8.7 LOCATION SERVICES MESSAGES . 54
8.7.1 LOCATION INFORMATION . 54
9 Information element codings . 54
9.1 Message discriminator . 54
9.2 MESSAGE TYPE . 55
9.3 Other information elements . 56
9.3.1 Channel Number . 57
9.3.2 Link Identifier . 58
9.3.3 Activation Type . 58
9.3.4 BS Power . 59
9.3.5 Channel Identification . 60
9.3.6 Channel Mode . 60
9.3.7 Encryption information . 62
9.3.8 Frame Number . 62
9.3.9 Handover reference . 63
9.3.10 L1 Information . 63
9.3.11 L3 Information (message name) . 63
9.3.12 MS Identity . 63
9.3.13 MS Power . 63
9.3.14 Paging Group . 64
9.3.15 Paging Load . 64
9.3.16 Physical Context . 64
9.3.17 Access Delay . 65
9.3.18 RACH Load . 65
9.3.19 Request Reference . 65
9.3.20 Release Mode . 66
9.3.21 Resource Information . 66
9.3.22 RLM Cause . 66
9.3.23 Starting Time . 67
9.3.24 Timing Advance . 67
9.3.25 Uplink Measurements . 67
9.3.26 Cause . 68
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9.3.27 Measurement result number . 71
9.3.28 Message Identifier. 71
9.3.29 SACCH Information . 71
9.3.30 System Info Type . 72
9.3.31 MS Power Parameters . 73
9.3.32 BS Power Parameters. 73
9.3.33 Pre-processing Parameters . 74
9.3.34 Pre-processed Measurements . 74
9.3.35 Full Immediate Assign Info . 74
9.3.36 SMSCB Information . 75
9.3.37 MS Timing Offset . 75
9.3.38 Erroneous Message . 75
9.3.39 Full BCCH Information (message name) . 75
9.3.40 Channel Needed . 76
9.3.41 CB Command type . 76
9.3.42 SMSCB Message . 77
9.3.43 CBCH Load Information . 77
9.3.44 SMSCB Channel Indicator . 77
9.3.45 Group call reference. 78
9.3.46 Channel description . 78
9.3.47 NCH DRX information . 78
9.3.48 Command indicator. 78
9.3.49 eMLPP Priority . 79
9.3.50 UIC . 79
9.3.51 Main channel reference . 79
9.3.52 MultiRate configuration . 80
9.3.53 MultiRate Control . 80
9.3.54 Supported Codec Types . 80
9.3.55 Codec Configuration . 82
9.3.56 Round Trip Delay . 83
9.3.57 TFO Status . 83
9.3.58 LLP APDU . 84
9.3.59 TFO transparent container . 84
9.3.60 DRX Info . 84
Annex A (informative): Change History . 85
History . 86

ETSI
3GPP TS 48.058 version 13.1.0 Release 13 7 ETSI TS 148 058 V13.1.0 (2016-04)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
3GPP TS 48.058 version 13.1.0 Release 13 8 ETSI TS 148 058 V13.1.0 (2016-04)
1 Scope
The present document specifies the general structure of layer 3 and traffic management procedures and messages used
on the A-bis interface to support signalling procedures as defined in 3GPP TS 24.008 and 3GPP TS 44.018. Support for
Location Services (LCS) related signalling, as defined in 3GPP TS 23.071, is also included. 3GPP TS 23.071 identifies
new A-bis signalling to support BTS-embedded Type B LMUs as well as standalone, Type B LMUs. The standalone
Type B LMU supports the layer 1 and 2 signalling for the A-bis as well as the Location Service message defined in the
present document.
The use and general aspects of the Base Station Controller (BSC) to Base Station Transceiver (BTS) interface (the A-
bis interface) are given in 3GPP TS 48.051.
Network management procedures and messages for the A-bis interface are defined in 3GPP TS 08.59.
The functional split between BSC and BTS is defined in 3GPP TS 48.052. The procedures and messages required to
support this split are defined in detail in the present document.
1.1 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 43.020: "Security related network functions".
[2a] 3GPP TS 23.071: "Location Services; Functional description – Stage 2".
[3] 3GPP TS 44.004: "Layer 1 General requirements".
[4] 3GPP TS 44.005: "Data Link (DL) layer General aspects".
[5] 3GPP TS 44.006: "Mobile Station - Base Station System (MS - BSS) interface Data Link (DL)
layer specification".
[6] 3GPP TS 24.008: "Mobile radio interface layer 3 specification; Core Network Protocols; Stage 3".
[7] 3GPP TS 44.012: "Short Message Service Cell Broadcast (SMSCB) support on the mobile radio
interface".
[7a] 3GPP TS 44.071: "Mobile radio interface layer 3 Location Services (LCS) specification".
[8] 3GPP TS 45.002: "Multiplexing and multiple access on the radio path".
[9] 3GPP TS 45.005: "Radio transmission and reception".
[10] 3GPP TS 45.008: "Radio subsystem link control".
[11] 3GPP TS 45.009: "Link Adaptation".
[12] 3GPP TS 45.010: "Radio subsystem synchronization".
[13] 3GPP TS 48.006: "Signaling transport specification mechanism for the Base Station System –
Mobile-services Switching Centre (BSS - MSC) interface".
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3GPP TS 48.058 version 13.1.0 Release 13 9 ETSI TS 148 058 V13.1.0 (2016-04)
[14] 3GPP TS 48.008: "Mobile-services Switching Centre – Base Station System (MSC-BSS)
interface; Layer 3 specification".
[15] 3GPP TS 48.051: "Base Station Controller - Base Transceiver Station (BSC - BTS) interface;
General aspects".
[16] 3GPP TS 48.052: "Base Station Controller - Base Transceiver Station (BSC - BTS) interface;
Interface principles".
[17] 3GPP TS 48.056: "Base Station Controller - Base Transceiver Station (BSC - BTS) interface;
Layer 2 specification".
[18] 3GPP TS 26.103: "Speech Codec List for GSM and UMTS".
[19] 3GPP TS 44.018: "Radio Resource Control Protocol".
1.2 Abbreviations
For the purposes of the present document, the abbreviations defined in 3GPP TR 21.905 apply.
2 Protocol model
A model for L3 can be found in figure 2.1.
L2 addressing is made to TRX (or BCF) using the TEI of LAPD. Different L2 links are used for traffic management
messages (RSL, Radio Signalling Link), network management messages (OML, Operation & Maintenance Link) and
L2 management messages (L2ML, Layer 2 Management Link).
For traffic management, two types of signalling messages have been defined:
Transparent Messages: Messages which are forwarded by BTS without interpretation or changes.
Non-Transparent Messages: Messages which are sent only between BSC and BTS and which BTS is acting upon or
which are the results of BTS actions.
In addition, the messages have been grouped into four main groups: Radio Link Layer Management, Dedicated Channel
Management, Common Channel Management and TRX Management messages.
Discrimination between these types and groups is based on the Message Discriminator which is sent as the first octet in
all messages. Transparent and non-transparent messages are discriminated by a transparency flag (T-bit) in the Message
Discriminator. Transparent messages are merely forwarded to L2 on the radio interface.
In order to address the relevant radio channel, a Channel Number element is included to support the distribution of
messages to relevant physical channels on the TRX. A Link Identifier element supports the distribution on logical
links/channels on the radio interface (compare the DLCI element of the A interface, 3GPP TS 48.006).
All messages in this GTS are to be transmitted on the A-bis interface using the I format of LAPD, except for
MEASUREMENT RESULT which is sent in UI format.
ETSI
3GPP TS 48.058 version 13.1.0 Release 13 10 ETSI TS 148 058 V13.1.0 (2016-04)
Other processes within BTS
Chan No
Link
distri-
bution
Traffic Management
Procedures
(08.58)
To radio
interface Non-
Transparent
Transparent
Messages
Messages
Network
L2
Management
Distribution Management
Procedures
Procedures
(12.21)
L3
L2
L2ML
RSL
OML
Figure 2.1/48.058: L3 model
3 Radio Link Layer Management Procedures
This sub-clause describes procedures related to the management of a link layer connection on the radio path.
3.1 Link establishment indication
This procedure is used by BTS to indicate to BSC that a layer 2 link on the radio path has been established in multi-
frame mode at the initiative of an MS. BSC can use this indication to set up an SCCP connection to MSC.
Upon reception of a SABM frame on a link on an active channel, the BTS sends an ESTablish INDication message to
BSC. The message contains the contents of the information field of the SABM frame if present.
T
...