ETSI ETS 300 560 ed.2 (1996-01)

Digital cellular telecommunications system (Phase 2) (GSM); Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface (GSM 04.12)

RE/SMG-030412P

Digitalni celični telekomunikacijski sistem (faza 2) – Celična radiodifuzija storitve kratkih sporočil (SMSCB) kot podpora vmesniku mobilnega radia (GSM 04.12)

General Information

• Status: Published
• Publication Date: 01-Feb-1996
• Technical Committee: SMG 3 - Network Aspects
• Current Stage: 12 - Completion
• Due Date: 12-Jan-1996
• Completion Date: 02-Feb-1996
• Ref Project: SIST ETS 300 560 E2:2003 - Digital cellular telecommunications system (Phase 2) (GSM); Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface (GSM 04.12)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 560 E2:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D±&HOLþQDUDGLRGLIX]LMDVWRULWYH
NUDWNLKVSRURþLO606&%NRWSRGSRUDYPHVQLNXPRELOQHJDUDGLD*60
Digital cellular telecommunications system (Phase 2) (GSM); Short Message Service
Cell Broadcast (SMSCB) support on the mobile radio interface (GSM 04.12)
Ta slovenski standard je istoveten z: ETS 300 560 Edition 2
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 560 E2:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 560 E2:2003

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SIST ETS 300 560 E2:2003
EUROPEAN ETS 300 560
TELECOMMUNICATION January 1996
STANDARD Second Edition
Source: ETSI TC-SMG Reference: RE/SMG-030412P
ICS: 33.060.50
Digital cellular telecommunications system, Global System for Mobile communications (GSM)
Key words:
Digital cellular telecommunications system (Phase 2);
Short Message Service Cell Broadcast (SMSCB)
support on the mobile radio interface
(GSM 04.12)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
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 1996. All rights reserved.
New presentation - see History box

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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 560: January 1996 (GSM 04.12 version 4.5.0)
Contents
Foreword.5
1 Introduction.7
1.1 Scope .7
1.2 Normative references .7
1.3 Definitions and abbreviations.7
2 General description .7
2.1 Scheduling Information. 8
3 Message Format on BTS-MS Interface.8
3.1 General.8
3.2 Format convention.9
3.2.1 Numbering convention.9
3.2.2 Order of bit transmission.9
3.3 Block content.9
3.3.1 Block Type . 10
3.4 SMSCB Message . 10
3.5 Schedule Message. 11
3.5.1 Header . 11
3.5.2 New CBSMS Message Bitmap. 12
3.5.3 New CBSMS Message Description. 13
3.5.4 Other Message Descriptions. 13
3.5.5 Message description encoding . 14
3.5.5.1 First transmission of an SMSCB within the Schedule
Period. 14
3.5.5.2 Retransmission indication . 14
3.5.5.3 Free Message Slot, optional reading. 15
3.5.5.4 Free Message Slot, reading advised . 15
3.5.5.5 Reserved Codepoints. 15
Annex A (informative): Sample Implementation of SMSCB DRX Mode. 16
History. 18

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ETS 300 560: January 1996 (GSM 04.12 version 4.5.0)
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).
This ETS defines the Short Message Service Cell Broadcast (SMSCB) support on mobile radio interface
within the digital cellular telecommunications system (Phase 2).
This ETS correspond to GSM technical specification, GSM 04.12 version 4.5.0.
The specification from which this ETS has been derived was originally based on CEPT documentation,
hence the presentation of this ETS may not be entirely in accordance with the ETSI/PNE rules.
Reference is made within this ETS to GSM Technical Specifications (GSM-TS) (note).
NOTE: TC-SMG has produced documents which give the technical specifications for the
implementation of the European digital cellular telecommunications system. Historically,
these documents have been identified as GSM Technical Specifications (GSM-TS).
These TSs may have subsequently become I-ETSs (Phase 1), or ETSs (Phase 2),
whilst others may become ETSI Technical Reports (ETRs). GSM-TSs are, for editorial
reasons, still referred to in current GSM ETSs.
Transposition dates
Date of adoption of this ETS: 31 January 1996
Date of latest announcement of this ETS (doa): 30 April 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 October 1996
Date of withdrawal of any conflicting National Standard (dow): 31 October 1996

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ETS 300 560: January 1996 (GSM 04.12 version 4.5.0)
1 Introduction
1.1 Scope
This European Telecommunication Standard (ETS) describes how the Short Message Service - Cell
Broadcast (SMSCB) (Teleservice 23 as specified in Technical Specification GSM 02.03) is supported over
the mobile radio interface.
1.2 Normative references
This ETS incorporates by dated and undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
to this ETS only when incorporated in it by amendment or revision. For undated references, the latest
edition of the publication referred to applies.
[1] GSM 01.04 (ETR 100): "European digital cellular telecommunications system
(Phase 2); Abbreviations and acronyms".
[2] GSM 02.03 (ETS 300 502): "European digital cellular telecommunications
system (Phase 2); Teleservices supported by a GSM Public Land Mobile
Network (PLMN)".
[3] GSM 03.41 (ETS 300 537): "European digital cellular telecommunications
system (Phase 2); Technical realization of Short Message Service Cell
Broadcast (SMSCB)".
[4] GSM 04.04 (ETS 300 553): "European digital cellular telecommunications
system (Phase 2); Layer 1 General requirements".
[5] GSM 04.06 (ETS 300 555): "European digital cellular telecommunications
system (Phase 2); Mobile Station - Base Station System (MS - BSS) interface
Data Link (DL) layer specification".
[6] GSM 05.02 (ETS 300 574): "European digital cellular telecommunications
system (Phase 2); Multiplexing and multiple access on the radio path".
1.3 Definitions and abbreviations
Abbreviations used in this specification are listed in GSM 01.04
2 General description
SMSCB is a service in which short messages may be broadcast from a PLMN to MSs. SMSCB messages
come from different sources (e.g. traffic reports, weather reports). The source and subject of the SMSCB
message is identified by a message identifier in the SMSCB message header. A sequence number in the
SMSCB message header enables the MS to determine when a new message from a given source is
available.
SMSCB messages are not acknowledged by the MS. Reception of SMSCB messages by the MS is only
possible in idle mode. The geographical area over which each SMSCB message is transmitted is selected
by the PLMN operator, by agreement with the provider of the information.
A SMSCB message is an end-to-end message that is formatted by/for the SMSCB application, and which
is intended for customer viewing. Its format is described in detail in Technical Specification GSM 03.41. A
CB message is any message sent on the CBCH. It can be an occurrence of a SMSCB message, or a
schedule message.
The SMS Cell Broadcast service is designed to minimise the battery usage requirements for a Mobile
Station. A Mobile Station can read the first part of a CB message and then decide whether or not to read

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the rest of the message. In addition, the network may broadcast Schedule Messages, providing
information in advance about the CB messages that will be sent immediately afterwards. The Mobile
Station may use this scheduling information to restrict reception to those messages the customer is
interested in receiving. This SMSCB DRX feature is optional in the network and the Mobile Station.
2.1 Scheduling Information
The network supporting the SMSCB DRX feature transmits Schedule Messages. A Schedule Message
includes information about a number of immediately following consecutive CB messages, planned for that
cell. The length of time covered by the CB messages referred to in a Schedule Message is called the
Schedule Period of that message. For optimum DRX, a new Schedule Message should follow the last
message of a Schedule Period. When no information is known about a CB message, e.g., because no
Schedule Message has been received referring to that CB message, a Mobile Station shall read (at least)
the first part of the CB message.
The network may override the published schedule to transmit new high-priority SMSCB messages.
However, after any schedule deviation, the network shall resume the schedule, by transmitting the
scheduled CB messages at the scheduled times listed in the Schedule Message.
The Schedule Message contains a Message Description for each CB message to be broadcast during the
scheduling period, in order of transmission. The position of a CB message is called the "message slot
number" of the CB message, and it indicates the position of the CB message within the schedule period.
Each Message Description includes various information, including for SMSCB messages directly or
indirectly all or part of their message identifier, and whether an occurrence is a repetition or not.
Each Schedule Message includes a Begin Slot Number field and an End Slot Number field. The End Slot
Number field indicates the length of the schedule period (i.e., specifically the number of CB message slots
about which information is provided). In the case where the network uses Schedule Messages to describe
all message slots in advance, the first Schedule Message of the next schedule period will be transmitted in
the message slot pointed by End Slot Number plus 1. The Begin Slot Number is defined to allow the
network to broadcast several Schedule Messages referring to the same schedule period. The Begin Slot
Number field indicates the message slot number of the CB message following the received Schedule
Message.
The networks may send unscheduled Schedule Messages during empty message slots. The network need
only update the Begin Slot Number in an unscheduled Schedule Message to reflect the current offset within
the Schedule Message of the next message to be transmitted.
3 Message Format on BTS-MS Interface
3.1 General
A CB message consists of a 88 octets of information. The 88 octet block is segmented into four 22 octet
blocks. A 1 octet Block type is added as a header to each 22 octet block. The overall blocks are thus 23
octets in length.
The message blocks are sent on the channel allocated as CBCH by Technical Specification GSM 05.02.
The timing of the messages is defined in Technical Specification GSM 05.02. If the network has no cell
broadcast information to transmit, then it may choose to transmit a null message.

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3.2 Format convention
3.2.1 Numbering convention
The basic convention used in this technical specification is illustrated in figure 1. The bits are grouped into
octets. The bits of an octet are shown horizontally and are numbered from 1 to 8. Multiple octets are
shown vertically and are numbered from 1 to 23.
Bit: 8   7   6   5   4   3   2   1
    �˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¿ Octet:
‡                        ‡
   ‡                        ‡   1
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡                        ‡
   ‡                        ‡   2
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
:                        :
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡                        ‡
   ‡                        ‡  23
�˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜�
Figure 1/GSM 04.12: Format convention
3.2.2 Order of bit transmission
The message blocks are sent on the CBCH as defined in Technical Specification GSM 05.02 using the
coding defined for that channel.
The order of bit transmission is defined in Technical Specification GSM 04.04.
3.3 Block content
The 23 octet blocks are coded as follows:
Bit: 8   7   6   5   4   3   2   1
    �˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¿ Octet:
‡                        ‡
   ‡         Block type          ‡   1
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡                        ‡
   ‡         Information          ‡   2
:                        :
‡                        ‡
   ‡                        ‡  23
�˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜�
Figure 2/GSM 04.12: Block content

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3.3.1 Block Type
The purpose of the Block Type is to identify the function of the block and message being sent. The block
type is coded as shown in figure 3/GSM 04.12.
Bit: 8   7   6   5   4   3   2   1
  �˜˜˜˜˜´˜˜˜˜˜˜˜˜˜˜˜´˜˜˜˜˜´˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¿ Octet:
‡Spare‡  LPD  ‡ LB ‡  Sequence Number   ‡
   ‡ 0 ‡ 0   1 ‡   ‡            ‡   1
�˜˜˜˜˜`˜˜˜˜˜˜˜˜˜˜˜`˜˜˜˜˜`˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜�
Figure 3/GSM 04.12: Block type content
Bits 8 is spare and set to zero by the sender. In order to allow compatibility with future modifications to this
protocol, bits 8 shall be ignored by the receiver and messages shall not be rejected because it is set to
one.
The Link Protocol Discriminator (LPD) takes the value "0 1". Other values of LPD indicate other protocols
which are outside the scope of Technical Specification GSM 04.12, and shall cause the message to be
ignored when the Cell Broadcast LPD is expected instead.
NOTE: LPD = "0 0" corresponds to the data link protocol used by LAPDm (see Technical
Specification GSM 04.06).
In an SMSCB message the last block containing SMSCB information is signalled by the Last Block (LB) bit.
When the LB bit is set to “0”, the next block may contain SMSCB information. When the LB bit is set to “1”,
the remaining block(s) do(es) not contain SMSCB information.
Table 1/GSM 04.12 Sequence number coding
Bit No  4  3  2  1
    �˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¿
    ‡ 0  0  0  0 ‡ First block
    ‡         ‡
    ‡ 0  0  0  1 ‡ Second block
    ‡         ‡
    ‡ 0  0  1  0 ‡ Third block
    ‡         ‡
    ‡ 0  0  1  1 ‡ Fourth block
    ‡         ‡
    ‡ 1  0  0  0 ‡ First schedule block:
    ‡         ‡ Message contains SMSCB
    ‡         ‡ scheduling information
    ‡         ‡
    ‡ 1  1  1  1 ‡ Null message (does not contain
    �˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜� valid SMSCB information)
all other values of bits 4 to 1 are reserved for future use.
The use of a reserved code point shall cause the message to be ignored.
3.4 SMSCB Message
The SMSCB message is a message with four consecutive blocks, with Block Types "first block", "second
block", "third block" and "fourth block".
A null message (which is indicated by the Sequence Number 1111 (binary)) shall have octets 2 to 23,
inclusive, filled with the value 2B (hex)
The SMSCB message coding is defined in Technical Specification GSM 03.41.

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3.5 Schedule Message
The text of the Schedule Message provides information pertaining to the CB messages sent afterward.
A Schedule Message consists of 4 consecutive blocks with Block Types "first schedule block", "second
block", "third block" and "fourth block".
A Schedule Message containing scheduling data which does not fill the 88 octets shall be padded with the
hexadecimal value "2B" after the end of the used part of the message.
The Schedule Message comprises a 2-octet header followed by three parts, the first of
...