SIST EN 300 949 V6.2.1:2003

Digital cellular telecommunications system (Phase 2+) (GSM); Broadcast Call Control (BCC) protocol (GSM 04.69 version 6.2.1 Release 1997)

Upgrade from Phase 2+ to Release 1997

Digitalni celični telekomunikacijski sistem (faza 2+) – Protokol krmiljenja radiodifuzijskega klica (BCC) (GSM 04.69, različica 6.2.1, izdaja 1997)

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 949 V6.2.1 (2000-05) - Digital cellular telecommunications system (Phase 2+) (GSM); Broadcast Call Control (BCC) protocol (GSM 04.69 version 6.2.1 Release 1997)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 300 949 V6.2.1:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D±3URWRNRONUPLOMHQMD
UDGLRGLIX]LMVNHJDNOLFD%&&*60UD]OLþLFDL]GDMD
Digital cellular telecommunications system (Phase 2+) (GSM); Broadcast Call Control
(BCC) protocol (GSM 04.69 version 6.2.1 Release 1997)
Ta slovenski standard je istoveten z: EN 300 949 Version 6.2.1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST EN 300 949 V6.2.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 300 949 V6.2.1:2003

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SIST EN 300 949 V6.2.1:2003
ETSI EN 300 949 V6.2.1 (2000-04)
European Standard (Telecommunications series)
Digital cellular telecommunications system (Phase 2+);
Broadcast Call Control (BCC) protocol
(GSM 04.69 version 6.2.1 Release 1997)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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SIST EN 300 949 V6.2.1:2003
(GSM 04.69 version 6.2.1 Release 1997) 2 ETSI EN 300 949 V6.2.1 (2000-04)
Reference
REN/SMG-030469Q6R2
Keywords
Digital cellular telecommunications system,
Global System for Mobile communications (GSM)
ETSI
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Important notice
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Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI

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SIST EN 300 949 V6.2.1:2003
(GSM 04.69 version 6.2.1 Release 1997) 3 ETSI EN 300 949 V6.2.1 (2000-04)
Contents
Intellectual Property Rights.5
Foreword .5
1 Scope.6
2 References.6
3 Definitions and abbreviations .6
3.1 Definitions.6
3.2 Abbreviations .7
4 Applicability.7
5 Main concepts .7
6 Elementary procedures for Broadcast Call Control .8
6.1 Overview .8
6.1.1 General.8
6.1.2 Broadcast call control states .8
6.1.2.1 Broadcast call control states at the MS side of the interface .8
6.1.2.1.1 Attributes and Parameters of BCC in the MS.8
6.1.2.1.2 NULL (U0).9
6.1.2.1.3 MM CONNECTION PENDING (U0.p) .9
6.1.2.1.4 BROADCAST CALL INITIATED (U1) .9
6.1.2.1.5 BROADCAST CALL ACTIVE (U2).9
6.1.2.1.6 BROADCAST CALL PRESENT (U3).9
6.1.2.1.7 BROADCAST CALL CONNECTION REQUESTED (U4) .9
6.1.2.1.8 TERMINATION REQUESTED (U5).9
6.1.2.1.9 RECEIVE MODE ACTIVE (U6) .9
6.1.2.1.10 BCC TIMERS IN THE MS.10
6.1.2.1.11 CONSISTENCY OF PARAMETERS AND STATES .10
6.1.2.2 BROADCAST CALL CONTROL STATES AT THE NETWORK SIDE OF THE INTERFACE.10
6.1.2.2.1 NULL (State N0).10
6.1.2.2.2 BROADCAST CALL INITIATED (N1) .10
6.1.2.2.3 BROADCAST CALL ACTIVE (N2).11
6.1.2.2.4 BROADCAST CALL ESTABLISHMENT PROCEEDING (N3) .11
6.1.2.2.5 TERMINATION REQUESTED (N4).11
6.2 Procedures for establishment of a broadcast call.11
6.2.1 Activation of a broadcast call by the network.11
6.2.2 Mobile originated establishment.11
6.2.2.1 Termination during mobile originated establishment.12
6.2.2.2 Abnormal cases .12
6.2.3 Mobile terminating broadcast call establishment in the MS .12
6.3 Procedures during the active state and receive mode active state of a broadcast call.12
6.3.1 Mobile station procedures in the active state .12
6.3.2 Network procedures in the active state .13
6.3.3 Mobile station procedures in the RECEIVE MODE ACTIVE state.13
6.4 Procedures for release, abortion, and termination of a broadcast call .13
6.4.1 Termination procedure.13
6.4.2 Abort and release procedures.14
6.5 Miscellaneous procedures .14
6.5.1 Status procedures.14
6.5.1.1 Get status procedure.14
6.5.1.2 Set parameter procedure.14
7 Handling of unknown, unforeseen, and erroneous protocol data .14
7.1 General .14
7.2 Message too short.15
7.3 Unknown or unforeseen transaction identifier.15
ETSI

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7.4 Unknown or unforeseen message type.15
7.5 Non-semantical mandatory information element errors.15
7.6 Unknown and unforeseen information elements in the non-imperative message part .16
7.6.1 Information elements unknown in the message.16
7.6.2 Out of sequence information elements.16
7.6.3 Repeated Information elements.16
7.7 Non-imperative message part errors.16
7.7.1 Syntactically incorrect optional Information elements.16
7.8 Messages with semantically incorrect contents .16
8 Message functional definitions and contents .16
8.1 CONNECT.17
8.2 GET STATUS.18
8.2.1 mobile identity .18
8.3 IMMEDIATE SETUP.18
8.3.1 Mobile identity.19
8.4 SET PARAMETER.19
8.5 SETUP .19
8.6 STATUS.20
8.6.1 Call state .20
8.6.2 State attributes .20
8.7 TERMINATION .21
8.8 TERMINATION REJECT.21
8.9 TERMINATION REQUEST .21
9 Contents of information elements value parts.22
9.1 Protocol Discriminator .22
9.2 Transaction identifier .22
9.3 Message Type.22
9.4 Other information elements .22
9.4.1 Call Reference .23
9.4.2 Call state .23
9.4.3 Cause .24
9.4.4 Originator indication.25
9.4.5 Spare Half Octet .26
9.4.6 State attributes .26
Annex A (informative): Change Request History .27
History.28
ETSI

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SIST EN 300 949 V6.2.1:2003
(GSM 04.69 version 6.2.1 Release 1997) 5 ETSI EN 300 949 V6.2.1 (2000-04)
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 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
(http://www.etsi.org/ipr).
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 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 European Standard (Telecommunications series) has been produced by the Special Mobile Group (SMG).
The present document specifies the Broadcast Call Control (BCC) protocol within the digital cellular
telecommunications system (Phase 2+).
The contents of the present document is subject to continuing work within SMG and may change following formal SMG
approval. Should SMG modify the contents of the present document it will be re-released with an identifying change of
release date and an increase in version number as follows:
Version 6.x.y
where:
6 indicates Release 1997 of GSM Phase 2+.
x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates,
etc.
y the third digit is incremented when editorial only changes have been incorporated in the specification.
National transposition dates
Date of adoption of this EN: 31 March 2000
Date of latest announcement of this EN (doa): 30 June 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 December 2000
Date of withdrawal of any conflicting National Standard (dow): 31 December 2000
ETSI

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SIST EN 300 949 V6.2.1:2003
(GSM 04.69 version 6.2.1 Release 1997) 6 ETSI EN 300 949 V6.2.1 (2000-04)
1 Scope
The present document specifies the Broadcast Call Control (BCC) protocol used by the Voice Broadcast Call Service
(VBCS) on the radio interface.
2 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.
• A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
• For this Release 1997 document, references to GSM documents are for Release 1997 versions (version 6.x.y).
[1] GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and
acronyms".
[2] GSM 02.69): "Digital cellular telecommunications system (Phase 2+); Voice Broadcast Call
Service (VBCS) stage 1".
[3] GSM 03.03: "Digital cellular telecommunications system (Phase 2+); Numbering, addressing and
identification".
[4] GSM 03.67: "Digital cellular telecommunications system (Phase 2+); enhanced Multi-Level
Precedence and Pre-emption service (eMLPP) - Stage 2".
[5] GSM 03.69: "Digital cellular telecommunications system (Phase 2+); Voice Broadcast Call
Service (VBCS) stage 2".
[6] GSM 04.06: "Digital cellular telecommunications system (Phase 2+); Mobile Station - Base
Station System (MS - BSS) interface Data Link (DL) layer specification".
[7] GSM 04.07: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface
signalling layer 3 General aspects".
[8] GSM 04.08: "Digital cellular telecommunications system (Phase 2+); Mobile radio interface
layer 3 specification".
3 Definitions and abbreviations
3.1 Definitions
Definitions used in the present document are also defined in GSM 02.69.
For the purposes of the present document, the following terms and definitions apply.
Attachment of the user connection: See GSM 04.08, subclause 5.2.
Broadcast call channel: Downlink channel to be allocated in each cell of the group call area for a particular broadcast
call. All MSs of the listening service subscribers in one cell shall listen to the common downlink.
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Broadcast call: Is used in the same sense as "voice broadcast call".
Calling user: BCC entity in the Mobile Station (MS) initiating or having initiated a broadcast call.
Clearing the context related to the broadcast call establishment: all running BCC timers in the relevant BCC entity
are stopped, all attributes in the relevant BCC entity are deleted.
Downlink: Network to MS direction.
Group receive mode: See GSM 04.08.
Originating mobile station: MS initiating or having initiated the broadcast call.
Uplink: Mobile station to network direction.
3.2 Abbreviations
Abbreviations used in the present document are also listed in GSM 01.04.
For the purposes of the present document, the following abbreviation applies:
BCC Broadcast Call Control.
4 Applicability
Support of the broadcast call protocol is optional in the MS and in the network.
5 Main concepts
The present document describes the broadcast call control (BCC) protocol, which is one of the protocols of the
Connection Management (CM) sublayer (see GSM 04.07).
There is in general more than one MS engaged in a broadcast call. Consequently, there is in general more than one MS
with a BCC entity engaged in the same broadcast call, and there is one BCC entity in the network engaged in that
broadcast call.
Under which conditions a BCC message is passed from lower (sub-)layers to the BCC entity is defined in the
specifications of the sub-layers.
The MS shall ignore BCC messages that it receives which were sent in unacknowledged mode and which explicitly
specify as destination a mobile identity which is not a mobile identity of the MS.
Higher layers and the MM sub-layer decide when to accept parallel BCC transactions and when/whether to accept BCC
transactions in parallel to other CM transactions.
The broadcast call may be initiated by a mobile user or by a dispatcher. Specification of a protocol for dispatchers is out
of the scope of the present document. Hence, in the scope of the present document, there are:
- one BCC entity in the network; and
- one or more than one BCC entities in different MSs
engaged in a broadcast call, and one ore none of the MSs is the originator of the broadcast call (called the originating
MS in the present document).
NOTE: Whereas for the Group Call Control (GCC) protocol (see GSM 04.68), in certain situations, the GCC
entity in a MS assumes to be the originator of a broadcast call without being the originator, this is not the
case for the BCC protocol.
ETSI

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The originator of the BCC transaction chooses the Transaction Identifier (TI). A MS not assuming to be the originator
of the transaction will chose the transaction identifier received from the network, setting the TI flag to 1+x mod 2 where
x is the received TI flag.
The present document describes the broadcast call control protocol only with regard to two peer entities, one in a MS,
the other one in the network. The call control entities are described as communicating finite state machines which
exchange messages across the radio interface and communicate internally with other protocol (sub)layers. In particular,
the BCC protocol uses the MM and RR sublayer specified in GSM 04.08. The BCC entity in a MS that is not the
originator of the broadcast call shall not send messages to its peer entity. This description in only normative as far as the
consequential externally observable behaviour is concerned. For simplicity, instead of using the terms "BCC entity in
the MS" and "BCC entity in the network", the present document often uses the terms "MS" and "network" if no
confusion may arise.
Certain sequences of actions of the two peer entities compose "elementary procedures" which are used as a basis for the
description in the present document. These elementary procedures are defined in clause 6.
The network should apply supervisory functions to verify that the BCC procedures are progressing and if not, take
appropriate means to resolve the problems. This, however, is out of the scope of the present document.
6 Elementary procedures for Broadcast Call Control
6.1 Overview
6.1.1 General
The elementary procedures may be broadcasted into the following classes:
- broadcast call establishment procedures;
- broadcast call termination procedures;
- broadcast call information phase procedures;
- miscellaneous procedures.
6.1.2 Broadcast call control states
6.1.2.1 Broadcast call control states at the MS side of the interface
The BCC entity of the MS is described as an extended finite state machine. It performs transitions between states. It has
certain parameters and attributes, e.g. configuration parameters and behaviour parameters, which it sets and changes
based on interaction with higher and lower (sub-)layers and on message exchange with its peer entity. If a configuration
parameter is set to a certain value, the MS shall also adapt the configuration accordingly. Behaviour parameters decide
on (part of) the behaviour of the BCC entity. When the BCC entity in the MS receives a message, it shall first analyse
whether it shall ignore the message, see clauses 5 and 7.
6.1.2.1.1 Attributes and Parameters of BCC in the MS
For the following behaviour parameters, the description is informative.
Parameter Description
ORIG Depending on the context, the MS assumes to be the originator of the call (ORIG=T) or not to be the
originator of the call (ORIG=F).
COMM Depending on the context, the MS assumes that communication with its peer entity is enabled in
both directions (COMM = T) or not (COMM = F).
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For the following configuration parameters the MS shall adapt its configuration according to the parameter value and
parameter definition.
Parameter Definition
D-ATT D-ATT = T means that the MS attaches the user connection for the broadcast call in the downlink.
D-ATT = F means that the MS does not attach the user connection for the broadcast call in the
downlink.
U-ATT U-ATT = T means that the MS attaches the user connection for the broadcast call in the uplink.
U-ATT = F means that the MS does not attach the user connection for the broadcast call in the
uplink.
6.1.2.1.2 NULL (U0)
No broadcast call exists for the BCC entity. When entering the state, parameters shall be set to the following values, and
configuration shall be adapted to the new values of configuration parameters: ORIG = F, COMM = F, D-ATT = F,
U-ATT = F.
6.1.2.1.3 MM CONNECTION PENDING (U0.p)
The BCC entity has requested the explicit establishment of an MM connection. When entering the state, parameters shall
be set to the following values, and configuration shall be adapted to the new values of configuration parameters: ORIG =
T, COMM = F, D-ATT = F, U-ATT = F.
6.1.2.1.4 BROADCAST CALL INITIATED (U1)
The BCC entity has requested the peer entity in the network to establish a broadcast call. When entering the state,
parameters shall be set to the following values, and configuration shall be adapted to the new values of configuration
parameters: ORIG = T, COMM = T, D-ATT = F, U-ATT = F.
6.1.2.1.5 BROADCAST CALL ACTIVE (U2)
The broadcast call is established at least in one cell. When entering the state, parameters shall be set to the following
values, and configuration shall be adapted to the new values of configuration parameters: ORIG = T, COMM = T,
D-ATT = T, U-ATT = T.
6.1.2.1.6 BROADCAST CALL PRESENT (U3)
The MS has received a notification about an ongoing broadcast call. Higher layers are requested to accept or reject the
call. When entering the state, parameters shall be set to the following values, and configuration shall be adapted to the
new values of configuration parameters: ORIG = F, COMM = F, D-ATT = F, U-ATT = F.
6.1.2.1.7 BROADCAST CALL CONNECTION REQUESTED (U4)
The MS has received a notification about an ongoing broadcast call. Higher layers have decided to accept the call. When
entering the state, parameters shall be set to the following values, and configuration shall be adapted to the new values
of configuration parameters: ORIG = F, COMM = F, D-ATT = F, U-ATT = F.
6.1.2.1.8 TERMINATION REQUESTED (U5)
The MS which is the originator of the broadcast call has been in state U1 or U2 and has sent a TERMINATION
REQUEST message to the network. When entering the state, parameters shall be set to the following values, and
configuration shall be adapted to the new values of configuration parameters: ORIG = T, COMM = T, D-ATT = T,
U-ATT = T.
6.1.2.1.9 RECEIVE MODE ACTIVE (U6)
The BCC entity in the MS in state U4, BROADCAST CALL CONNECTION REQUESTED, has got an indication from
lower (sub-)layers that RR has entered group receive mode (see GSM 04.08). When entering the state, parameters shall
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