ETSI TS 143 246 V13.0.0 (2016-01)
Digital cellular telecommunications system (Phase 2+); Multimedia Broadcast/Multicast Service (MBMS) in the GERAN; Stage 2 (3GPP TS 43.246 version 13.0.0 Release 13)
Digital cellular telecommunications system (Phase 2+); Multimedia Broadcast/Multicast Service (MBMS) in the GERAN; Stage 2 (3GPP TS 43.246 version 13.0.0 Release 13)
RTS/TSGG-0143246vd00
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ETSI TS 1143 246 V13.0.0 (201616-01)
TECHNICAL SPECIFICATIONION
Digital cellular telecocommunications system (Phahase 2+);
Multimedia Broadadcast/Multicast Service (MBBMS)
in the GERAN;
Stage 2
(3GPP TS 43.2.246 version 13.0.0 Release 13 13)
R
GLOBAL SYSTTEME FOR
MOBILE COMMUUNNICATIONS
---------------------- Page: 1 ----------------------
3GPP TS 43.246 version 13.0.0 Release 13 1 ETSI TS 143 246 V13.0.0 (2016-01)
Reference
RTS/TSGG-0143246vd00
Keywords
GSM
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
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Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
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Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2016.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3GPP TS 43.246 version 13.0.0 Release 13 2 ETSI TS 143 246 V13.0.0 (2016-01)
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
---------------------- Page: 3 ----------------------
3GPP TS 43.246 version 13.0.0 Release 13 3 ETSI TS 143 246 V13.0.0 (2016-01)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 MBMS GERAN Architecture . 7
4.1 General . 7
4.2 GERAN A/Gb mode architecture . 7
4.2.1 Protocol structure . 7
4.2.2 void . 7
4.2.3 MBMS reception . 7
4.3 GERAN Iu mode architecture . 8
4.3.1 Protocol structure . 8
4.3.2 void . 8
4.3.3 MBMS reception . 8
5. MBMS channel structure. 9
5.1 Logical channels . 9
5.2 Physical channels . 9
5.2.1 General . 9
5.2.2 Coding schemes . 9
5.2.3 Mapping of MPRACH onto physical channels . 9
6 MBMS procedures in GERAN . 9
6.1 Resource management procedures . 9
6.1.1 Session start . 9
6.1.1.1 General . 9
6.1.1.1a Pre-notification . 10
6.1.1.2 Notification of session start . 10
6.1.1.2.1 General . 10
6.1.1.2.2 Mobile stations in packet idle mode or MAC-Idle state . 10
6.1.1.2.3 Mobile stations in packet transfer mode or MAC-Shared state and mobile stations in dual
transfer mode or MAC-DTM state . 11
6.1.1.2.4 Mobile stations in dedicated mode or MAC-Dedicated state . 11
6.1.1.3 Initial counting procedure . 12
6.1.1.4 MBMS bearer establishment . 14
6.1.1.5 Address assignment procedure . 15
6.1.1.6 Repetition of notifications of an on-going MBMS session . 15
6.1.2 MBMS channel reconfiguration . 15
6.1.3 MBMS channel release . 16
6.2 Mobility procedures . 16
6.2.1 Distribution of MBMS neighbouring cell information . 16
6.2.2 MBMS reception resumption after cell reselection . 17
6.2.2.1 Default behaviour . 17
6.2.2.2 Fast reception resumption . 17
6.2.3 Cell change . 18
6.3 MBMS data transfer for p-t-m transmission . 19
6.3.1 General . 19
6.3.1.1 Point-to-multipoint data transfer options . 19
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 4 ETSI TS 143 246 V13.0.0 (2016-01)
6.3.1.2 RLC protocol behaviour . 19
6.3.2 Block retransmission based on mobile station feedback . 19
6.4 Multiple sessions . 20
6.4.1 Transmission of multiple sessions . 20
6.4.2 Reception of multiple sessions. 21
6.5 Suspension/Resumption of the reception of an MBMS session . 22
6.6 Acquisition of system information and paging messages . 22
6.6.1 General . 22
6.6.2 Acquisition of system information . 22
6.6.3 Reception of paging messages . 23
7 Mobile Station requirements . 23
7.1 General requirements . 23
7.2 Mobile Station tasks . 23
7.3 Multislot capabilities . 24
7.4 MBMS notification for mobile stations in dedicated mode or packet transfer mode or dual transfer mode . 24
8 Network requirements . 25
8.1 General requirements . 25
8.2 MBMS notification for mobile stations in dedicated mode or packet transfer mode or dual transfer mode . 25
Annex A (normative): Requirements and recommendations . 26
A.1 General requirements and recommendations . 26
A.1.1 General requirements . 26
A.1.2 General recommendations . 27
A.2 Mobile Station requirements and recommendations . 27
A.2.1 Mobile Station requirements . 27
A.2.2 Mobile Station recommendations . 27
A.3 GERAN requirements and recommendations . 27
A.3.1 GERAN requirements . 27
A.3.1 GERAN recommendations . 27
Annex B (informative): Physical channel allocation scenarios . 28
B.1 Data transfer when no uplink feedback channel is established . 28
B.1.1 PBCCH not deployed, transmission with frequency hopping . 28
B.1.2 PBCCH not deployed, transmission without frequency hopping . 29
B.1.3 PBCCH deployed, transmission with frequency hopping . 29
B.2 Data transfer when an uplink feedback channel is established . 30
B.2.1 PBCCH not deployed, transmission with frequency hopping . 30
B.2.2 PBCCH not deployed, transmission without frequency hopping . 31
B.2.3 PBCCH deployed, transmission with frequency hopping . 32
Annex C (informative): Change history . 33
History . 35
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 5 ETSI TS 143 246 V13.0.0 (2016-01)
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
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3GPP TS 43.246 version 13.0.0 Release 13 6 ETSI TS 143 246 V13.0.0 (2016-01)
1 Scope
The present document is part of the Release 6 "Introduction of the Multimedia Broadcast Multicast Service
(MBMS) in GERAN" work item and it is linked to the corresponding 3GPP TS 22.146: "Multimedia
Broadcast/Multicast Service (MBMS); Stage 1" [3] and 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service
(MBMS); Architecture and functional description" [5].
The purpose of the present document is to provide a stage 2 description of the changes required in existing
specifications for the "Introduction of the Multimedia Broadcast Multicast Service (MBMS) in GERAN" feature
for Release 6.
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. 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 TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".
[2] 3GPP TS 23.107: "Quality of Service (QoS) concept and architecture".
[3] 3GPP TS 22.146: "Multimedia Broadcast/Multicast Service (MBMS); Stage 1".
[4] 3GPP TS 22.246: "Multimedia Broadcast/Multicast Service (MBMS) user services; Stage 1".
[5] 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional
description".
[6] 3GPP TR 25.992: "Multimedia Broadcast/Multicast Service (MBMS); UTRAN/GERAN
requirements".
[7] 3GPP TS 25.346: "Introduction of Multimedia Broadcast/Multicast Service (MBMS) in the Radio
Access Network (RAN); Stage 2".
[8] 3GPP TS 45.002: "Multiplexing and multiple access on the radio path".
[9] 3GPP TS 45.008: "Radio subsystem link control".
[10] 3GPP TS 43.022: "Functions related to Mobile Station (MS) in idle mode and group receive
mode".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TS 22.146 [3] and the following
apply.
Dedicated MBMS Notification: A mechanism in the network that allows the network to notify mobile stations in
dedicated mode of starting MBMS multicast sessions.
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 7 ETSI TS 143 246 V13.0.0 (2016-01)
MBMS radio bearer: In A/Gb mode, an MBMS radio bearer is defined as "point-to-multipoint".
MBMS channel: An MBMS channel consists of the physical resources assigned to one (several) MBMS service(s). In
A/Gb mode, an MBMS channel carries one (several) MBMS radio bearer(s) and may be on one (several) PDCH(s) with
GPRS and/or EGPRS TBF(s).
MBMS session: Defined in 3GPP TS 22.146 [3].
MBMS service: Defined in 3GPP TS 22.146 [3].
MBMS service class: An MBMS service class is defined as either Background or Streaming, according to 3GPP TS
23.107 [2].
MBMS notification: Defined in 3GPP TS 23.246 [5].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
BM-SC Broadcast/Multicast Service Centre
MBMS Multimedia Broadcast/Multicast Service
MPRACH MBMS Packet Random Access Channel
p-t-p point-to-point
p-t-m point-to-multipoint
TMGI Temporary Mobile Group Identifier
4 MBMS GERAN Architecture
4.1 General
One new transmission mode exists to provide the MBMS service:
- Point-to-multipoint transmission (p-t-m)
Point-to-multipoint transmission is used to transfer MBMS specific information between the network and an
unspecified number of mobile stations. It is used for both broadcast and multicast modes of MBMS.
4.2 GERAN A/Gb mode architecture
4.2.1 Protocol structure
No modifications are required to the GPRS protocol stack (see 3GPP TS 23.060) for MBMS. However, some of the
radio protocols in the GERAN will require modifications to support MBMS p-t-m bearers.
4.2.2 void
4.2.3 MBMS reception
Table 4.2.3.1 shows whether a mobile station can support MBMS data reception according to its mode (packet idle
mode, packet transfer mode, dedicated mode or dual transfer mode) at the time of the MBMS bearer establishment i.e.
immediately prior to MBMS reception.
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 8 ETSI TS 143 246 V13.0.0 (2016-01)
Table 4.2.3.1: MBMS radio bearer available according to initial MAC mode and MBMS service
Packet idle mode Packet transfer mode Dedicated mode Dual transfer mode
(GMM-Standby or
GMM-Ready)
MBMS multicast
p-t-m p-t-p repair p-t-p repair (1) p-t-p repair
MBMS broadcast p-t-m Not specified (2) Not specified (3) Not specified (3)
1) A mobile station is moved to dual transfer mode on establishment of a TBF to request an MBMS p-t-p repair.
2) Support is optional in the mobile station.
3) Note that an MBMS broadcast service is only available on a p-t-m radio bearer.
4.3 GERAN Iu mode architecture
4.3.1 Protocol structure
No modifications are required to the GPRS protocol stack (see 3GPP TS 23.060 [1]) for MBMS. However, some of the
radio protocols in the GERAN will require modifications to support MBMS p-t-m bearers.
4.3.2 void
4.3.3 MBMS reception
Table 4.3.3.1 shows which type of MBMS radio bearer shall be assigned to the mobile station according to its RRC and
MAC states at the time of the MBMS bearer establishment i.e. immediately prior to MBMS reception.
Table 4.3.3.1: MBMS radio bearer available according to initial MAC and RRC states and MBMS
service
RRC-Idle RRC-GRA_PCH RRC-Cell_Shared RRC-Cell_Dedicated
MAC-Idle MAC-Idle MAC-Idle MAC-Shared MAC-Dedicated MAC-DTM
MBMS multicast p-t-m Not available (2) p-t-m p-t-p p-t-p (3) p-t-p
p-t-p (1) p-t-p (1)
MBMS broadcast p-t-m p-t-m p-t-m Not specified Not specified Not specified
(4) (5) (5)
1) A mobile station is moved to MAC-Shared state on establishment of an MBMS p-t-p radio bearer
2) A mobile station is moved to RRC-Cell_Shared state on establishment of an MBMS radio bearer (p-t-m or p-t-p)
3) A mobile station is moved to MAC-DTM state on establishment of an MBMS p-t-p radio bearer if it has no other
PS connections established
4) Support is optional in the mobile station
5) Note that an MBMS broadcast service is only available on a p-t-m radio bearer
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 9 ETSI TS 143 246 V13.0.0 (2016-01)
5. MBMS channel structure
5.1 Logical channels
For MBMS p-t-m transmission, the traffic data is carried on PDTCH (see 3GPP TS 45.002 [8]), whereas the control
data is carried on PACCH (see 3GPP TS 45.002 [8]).
A new logical channel is defined, the MPRACH, which may be used during the initial counting procedure (see sub-
clause 6.1.1.3). On the MPRACH, Packet Access Bursts or Extended Packet Access Bursts can be transmitted.
5.2 Physical channels
5.2.1 General
MBMS p-t-m radio bearers are transmitted on PDCH (see 3GPP TS 45.002 [8]).
On a PDCH it shall be possible to multiplex different MBMS p-t-m radio bearers and GPRS and/or EGPRS TBFs using
TFI.
5.2.2 Coding schemes
The existing GPRS and EGPRS coding schemes are used for MBMS.
An MBMS-capable mobile station shall support CS-1 to CS-4 and MCS-1 to MCS-9 in the downlink. A network
supporting MBMS may support only some of the coding schemes.
5.2.3 Mapping of MPRACH onto physical channels
The MPRACH may be mapped on any uplink PDCH.
The MPRACH is dynamically allocated in groups of four MPRACH blocks By (y=4x+i, i=0 ,., 3) corresponding to one
PDCH block Bx (x=0,.,11), indicated by a USF. The value of the USF allocated to the mobile station is signalled by
the network in the notification message.
6 MBMS procedures in GERAN
6.1 Resource management procedures
6.1.1 Session start
6.1.1.1 General
Upon receiving an MBMS SESSION START REQUEST message (or an MBMS SESSION UPDATE REQUEST
message for an ongoing MBMS broadcast session with an updated MBMS service area) from the SGSN, if the network
controls cells in the MBMS service area the network creates an MBMS Service Context (if not yet available for the
ongoing MBMS broadcast session), and acknowledges the SGSN using an MBMS SESSION START RESPONSE
message (or an MBMS SESSION UPDATE RESPONSE message). The network may receive an Allocation/Retention
Priority associated with the MBMS session in the MBMS SESSION START REQUEST message (or in the MBMS
SESSION UPDATE REQUEST message).
The network may use the Allocation/Retention Priority to prioritise between MBMS bearer services, and between
MBMS bearer services and non-MBMS bearer services. The network initiates the MBMS channel establishment in each
cell belonging to the MBMS service area where the network has decided to provide this MBMS service (and where the
MBMS channel has not yet been established in case of an ongoing MBMS broadcast session).
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 10 ETSI TS 143 246 V13.0.0 (2016-01)
The channel establishment procedure consists of the following steps:
- the optional pre-notification of the MBMS service which is starting a data transmission;
- the notification of all MBMS users in the cell of this MBMS service;
- an optional counting procedure; and
- a channel assignment message. The type of channel assigned may depend on the number of users in the cell who
respond to the notification in the counting procedure.
If counting is not required, the notification and channel assignment information may be transmitted in a single
(PACKET) PAGING REQUEST message in the case of an MBMS broadcast service or an MBMS multicast service.
6.1.1.1a Pre-notification
The network may indicate the incoming notification of a given MBMS service and MBMS session by sending a pre-
notification of this MBMS service and MBMS session to MBMS mobile stations in packet idle mode.
A pre-notification may be sent in PAGING REQUEST TYPE 1 or 2 messages on CCCH, or if PCCCH is present, in
PACKET PAGING REQUEST message and identifies the TMGI as well as, if availabl
...
ETSI TS 1143 246 V13.0.0 (201616-01)
TECHNICAL SPECIFICATIONION
Digital cellular telecocommunications system (Phahase 2+);
Multimedia Broadadcast/Multicast Service (MBBMS)
in the GERAN;
Stage 2
(3GPP TS 43.2.246 version 13.0.0 Release 13 13)
R
GLOBAL SYSTTEME FOR
MOBILE COMMUUNNICATIONS
---------------------- Page: 1 ----------------------
3GPP TS 43.246 version 13.0.0 Release 13 1 ETSI TS 143 246 V13.0.0 (2016-01)
Reference
RTS/TSGG-0143246vd00
Keywords
GSM
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2016.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
---------------------- Page: 2 ----------------------
3GPP TS 43.246 version 13.0.0 Release 13 2 ETSI TS 143 246 V13.0.0 (2016-01)
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
---------------------- Page: 3 ----------------------
3GPP TS 43.246 version 13.0.0 Release 13 3 ETSI TS 143 246 V13.0.0 (2016-01)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 MBMS GERAN Architecture . 7
4.1 General . 7
4.2 GERAN A/Gb mode architecture . 7
4.2.1 Protocol structure . 7
4.2.2 void . 7
4.2.3 MBMS reception . 7
4.3 GERAN Iu mode architecture . 8
4.3.1 Protocol structure . 8
4.3.2 void . 8
4.3.3 MBMS reception . 8
5. MBMS channel structure. 9
5.1 Logical channels . 9
5.2 Physical channels . 9
5.2.1 General . 9
5.2.2 Coding schemes . 9
5.2.3 Mapping of MPRACH onto physical channels . 9
6 MBMS procedures in GERAN . 9
6.1 Resource management procedures . 9
6.1.1 Session start . 9
6.1.1.1 General . 9
6.1.1.1a Pre-notification . 10
6.1.1.2 Notification of session start . 10
6.1.1.2.1 General . 10
6.1.1.2.2 Mobile stations in packet idle mode or MAC-Idle state . 10
6.1.1.2.3 Mobile stations in packet transfer mode or MAC-Shared state and mobile stations in dual
transfer mode or MAC-DTM state . 11
6.1.1.2.4 Mobile stations in dedicated mode or MAC-Dedicated state . 11
6.1.1.3 Initial counting procedure . 12
6.1.1.4 MBMS bearer establishment . 14
6.1.1.5 Address assignment procedure . 15
6.1.1.6 Repetition of notifications of an on-going MBMS session . 15
6.1.2 MBMS channel reconfiguration . 15
6.1.3 MBMS channel release . 16
6.2 Mobility procedures . 16
6.2.1 Distribution of MBMS neighbouring cell information . 16
6.2.2 MBMS reception resumption after cell reselection . 17
6.2.2.1 Default behaviour . 17
6.2.2.2 Fast reception resumption . 17
6.2.3 Cell change . 18
6.3 MBMS data transfer for p-t-m transmission . 19
6.3.1 General . 19
6.3.1.1 Point-to-multipoint data transfer options . 19
ETSI
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3GPP TS 43.246 version 13.0.0 Release 13 4 ETSI TS 143 246 V13.0.0 (2016-01)
6.3.1.2 RLC protocol behaviour . 19
6.3.2 Block retransmission based on mobile station feedback . 19
6.4 Multiple sessions . 20
6.4.1 Transmission of multiple sessions . 20
6.4.2 Reception of multiple sessions. 21
6.5 Suspension/Resumption of the reception of an MBMS session . 22
6.6 Acquisition of system information and paging messages . 22
6.6.1 General . 22
6.6.2 Acquisition of system information . 22
6.6.3 Reception of paging messages . 23
7 Mobile Station requirements . 23
7.1 General requirements . 23
7.2 Mobile Station tasks . 23
7.3 Multislot capabilities . 24
7.4 MBMS notification for mobile stations in dedicated mode or packet transfer mode or dual transfer mode . 24
8 Network requirements . 25
8.1 General requirements . 25
8.2 MBMS notification for mobile stations in dedicated mode or packet transfer mode or dual transfer mode . 25
Annex A (normative): Requirements and recommendations . 26
A.1 General requirements and recommendations . 26
A.1.1 General requirements . 26
A.1.2 General recommendations . 27
A.2 Mobile Station requirements and recommendations . 27
A.2.1 Mobile Station requirements . 27
A.2.2 Mobile Station recommendations . 27
A.3 GERAN requirements and recommendations . 27
A.3.1 GERAN requirements . 27
A.3.1 GERAN recommendations . 27
Annex B (informative): Physical channel allocation scenarios . 28
B.1 Data transfer when no uplink feedback channel is established . 28
B.1.1 PBCCH not deployed, transmission with frequency hopping . 28
B.1.2 PBCCH not deployed, transmission without frequency hopping . 29
B.1.3 PBCCH deployed, transmission with frequency hopping . 29
B.2 Data transfer when an uplink feedback channel is established . 30
B.2.1 PBCCH not deployed, transmission with frequency hopping . 30
B.2.2 PBCCH not deployed, transmission without frequency hopping . 31
B.2.3 PBCCH deployed, transmission with frequency hopping . 32
Annex C (informative): Change history . 33
History . 35
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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.
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3GPP TS 43.246 version 13.0.0 Release 13 6 ETSI TS 143 246 V13.0.0 (2016-01)
1 Scope
The present document is part of the Release 6 "Introduction of the Multimedia Broadcast Multicast Service
(MBMS) in GERAN" work item and it is linked to the corresponding 3GPP TS 22.146: "Multimedia
Broadcast/Multicast Service (MBMS); Stage 1" [3] and 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service
(MBMS); Architecture and functional description" [5].
The purpose of the present document is to provide a stage 2 description of the changes required in existing
specifications for the "Introduction of the Multimedia Broadcast Multicast Service (MBMS) in GERAN" feature
for Release 6.
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. 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 TS 23.060: "General Packet Radio Service (GPRS); Service description; Stage 2".
[2] 3GPP TS 23.107: "Quality of Service (QoS) concept and architecture".
[3] 3GPP TS 22.146: "Multimedia Broadcast/Multicast Service (MBMS); Stage 1".
[4] 3GPP TS 22.246: "Multimedia Broadcast/Multicast Service (MBMS) user services; Stage 1".
[5] 3GPP TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional
description".
[6] 3GPP TR 25.992: "Multimedia Broadcast/Multicast Service (MBMS); UTRAN/GERAN
requirements".
[7] 3GPP TS 25.346: "Introduction of Multimedia Broadcast/Multicast Service (MBMS) in the Radio
Access Network (RAN); Stage 2".
[8] 3GPP TS 45.002: "Multiplexing and multiple access on the radio path".
[9] 3GPP TS 45.008: "Radio subsystem link control".
[10] 3GPP TS 43.022: "Functions related to Mobile Station (MS) in idle mode and group receive
mode".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TS 22.146 [3] and the following
apply.
Dedicated MBMS Notification: A mechanism in the network that allows the network to notify mobile stations in
dedicated mode of starting MBMS multicast sessions.
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MBMS radio bearer: In A/Gb mode, an MBMS radio bearer is defined as "point-to-multipoint".
MBMS channel: An MBMS channel consists of the physical resources assigned to one (several) MBMS service(s). In
A/Gb mode, an MBMS channel carries one (several) MBMS radio bearer(s) and may be on one (several) PDCH(s) with
GPRS and/or EGPRS TBF(s).
MBMS session: Defined in 3GPP TS 22.146 [3].
MBMS service: Defined in 3GPP TS 22.146 [3].
MBMS service class: An MBMS service class is defined as either Background or Streaming, according to 3GPP TS
23.107 [2].
MBMS notification: Defined in 3GPP TS 23.246 [5].
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
BM-SC Broadcast/Multicast Service Centre
MBMS Multimedia Broadcast/Multicast Service
MPRACH MBMS Packet Random Access Channel
p-t-p point-to-point
p-t-m point-to-multipoint
TMGI Temporary Mobile Group Identifier
4 MBMS GERAN Architecture
4.1 General
One new transmission mode exists to provide the MBMS service:
- Point-to-multipoint transmission (p-t-m)
Point-to-multipoint transmission is used to transfer MBMS specific information between the network and an
unspecified number of mobile stations. It is used for both broadcast and multicast modes of MBMS.
4.2 GERAN A/Gb mode architecture
4.2.1 Protocol structure
No modifications are required to the GPRS protocol stack (see 3GPP TS 23.060) for MBMS. However, some of the
radio protocols in the GERAN will require modifications to support MBMS p-t-m bearers.
4.2.2 void
4.2.3 MBMS reception
Table 4.2.3.1 shows whether a mobile station can support MBMS data reception according to its mode (packet idle
mode, packet transfer mode, dedicated mode or dual transfer mode) at the time of the MBMS bearer establishment i.e.
immediately prior to MBMS reception.
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Table 4.2.3.1: MBMS radio bearer available according to initial MAC mode and MBMS service
Packet idle mode Packet transfer mode Dedicated mode Dual transfer mode
(GMM-Standby or
GMM-Ready)
MBMS multicast
p-t-m p-t-p repair p-t-p repair (1) p-t-p repair
MBMS broadcast p-t-m Not specified (2) Not specified (3) Not specified (3)
1) A mobile station is moved to dual transfer mode on establishment of a TBF to request an MBMS p-t-p repair.
2) Support is optional in the mobile station.
3) Note that an MBMS broadcast service is only available on a p-t-m radio bearer.
4.3 GERAN Iu mode architecture
4.3.1 Protocol structure
No modifications are required to the GPRS protocol stack (see 3GPP TS 23.060 [1]) for MBMS. However, some of the
radio protocols in the GERAN will require modifications to support MBMS p-t-m bearers.
4.3.2 void
4.3.3 MBMS reception
Table 4.3.3.1 shows which type of MBMS radio bearer shall be assigned to the mobile station according to its RRC and
MAC states at the time of the MBMS bearer establishment i.e. immediately prior to MBMS reception.
Table 4.3.3.1: MBMS radio bearer available according to initial MAC and RRC states and MBMS
service
RRC-Idle RRC-GRA_PCH RRC-Cell_Shared RRC-Cell_Dedicated
MAC-Idle MAC-Idle MAC-Idle MAC-Shared MAC-Dedicated MAC-DTM
MBMS multicast p-t-m Not available (2) p-t-m p-t-p p-t-p (3) p-t-p
p-t-p (1) p-t-p (1)
MBMS broadcast p-t-m p-t-m p-t-m Not specified Not specified Not specified
(4) (5) (5)
1) A mobile station is moved to MAC-Shared state on establishment of an MBMS p-t-p radio bearer
2) A mobile station is moved to RRC-Cell_Shared state on establishment of an MBMS radio bearer (p-t-m or p-t-p)
3) A mobile station is moved to MAC-DTM state on establishment of an MBMS p-t-p radio bearer if it has no other
PS connections established
4) Support is optional in the mobile station
5) Note that an MBMS broadcast service is only available on a p-t-m radio bearer
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5. MBMS channel structure
5.1 Logical channels
For MBMS p-t-m transmission, the traffic data is carried on PDTCH (see 3GPP TS 45.002 [8]), whereas the control
data is carried on PACCH (see 3GPP TS 45.002 [8]).
A new logical channel is defined, the MPRACH, which may be used during the initial counting procedure (see sub-
clause 6.1.1.3). On the MPRACH, Packet Access Bursts or Extended Packet Access Bursts can be transmitted.
5.2 Physical channels
5.2.1 General
MBMS p-t-m radio bearers are transmitted on PDCH (see 3GPP TS 45.002 [8]).
On a PDCH it shall be possible to multiplex different MBMS p-t-m radio bearers and GPRS and/or EGPRS TBFs using
TFI.
5.2.2 Coding schemes
The existing GPRS and EGPRS coding schemes are used for MBMS.
An MBMS-capable mobile station shall support CS-1 to CS-4 and MCS-1 to MCS-9 in the downlink. A network
supporting MBMS may support only some of the coding schemes.
5.2.3 Mapping of MPRACH onto physical channels
The MPRACH may be mapped on any uplink PDCH.
The MPRACH is dynamically allocated in groups of four MPRACH blocks By (y=4x+i, i=0 ,., 3) corresponding to one
PDCH block Bx (x=0,.,11), indicated by a USF. The value of the USF allocated to the mobile station is signalled by
the network in the notification message.
6 MBMS procedures in GERAN
6.1 Resource management procedures
6.1.1 Session start
6.1.1.1 General
Upon receiving an MBMS SESSION START REQUEST message (or an MBMS SESSION UPDATE REQUEST
message for an ongoing MBMS broadcast session with an updated MBMS service area) from the SGSN, if the network
controls cells in the MBMS service area the network creates an MBMS Service Context (if not yet available for the
ongoing MBMS broadcast session), and acknowledges the SGSN using an MBMS SESSION START RESPONSE
message (or an MBMS SESSION UPDATE RESPONSE message). The network may receive an Allocation/Retention
Priority associated with the MBMS session in the MBMS SESSION START REQUEST message (or in the MBMS
SESSION UPDATE REQUEST message).
The network may use the Allocation/Retention Priority to prioritise between MBMS bearer services, and between
MBMS bearer services and non-MBMS bearer services. The network initiates the MBMS channel establishment in each
cell belonging to the MBMS service area where the network has decided to provide this MBMS service (and where the
MBMS channel has not yet been established in case of an ongoing MBMS broadcast session).
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The channel establishment procedure consists of the following steps:
- the optional pre-notification of the MBMS service which is starting a data transmission;
- the notification of all MBMS users in the cell of this MBMS service;
- an optional counting procedure; and
- a channel assignment message. The type of channel assigned may depend on the number of users in the cell who
respond to the notification in the counting procedure.
If counting is not required, the notification and channel assignment information may be transmitted in a single
(PACKET) PAGING REQUEST message in the case of an MBMS broadcast service or an MBMS multicast service.
6.1.1.1a Pre-notification
The network may indicate the incoming notification of a given MBMS service and MBMS session by sending a pre-
notification of this MBMS service and MBMS session to MBMS mobile stations in packet idle mode.
A pre-notification may be sent in PAGING REQUEST TYPE 1 or 2 messages on CCCH, or if PCCCH is present, in
PACKET PAGING REQUEST message and identifies the TMGI as well as, if availabl
...
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