ETSI TS 102 744-3-8 V1.1.1 (2015-10)

Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 8: NAS Layer and User Plane Operation for MBMS Services

DTS/SES-00299-3-8

General Information

• Status: Published
• Publication Date: 25-Oct-2015
• Technical Committee: SES SCN - Satellite Communications and Navigation
• Current Stage: 12 - Completion
• Due Date: 25-Sep-2015
• Completion Date: 26-Oct-2015

Standards Content (Sample)

ETSI TS 102 744-3-8 V1.1.1 (2015-10)






TECHNICAL SPECIFICATION
Satellite Earth Stations and Systems (SES);
Family SL Satellite Radio Interface (Release 1);
Part 3: Control Plane and User Plane Specifications;
Sub-part 8: NAS Layer and User Plane Operation
for MBMS Services

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2 ETSI TS 102 744-3-8 V1.1.1 (2015-10)



Reference
DTS/SES-00299-3-8
Keywords
3GPP, GPRS, GSM, GSO, interface, MSS, radio,
satellite, TDM, TDMA, UMTS
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ETSI

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3 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Abbreviations . 7
4 Introduction . 7
4.1 Network Architecture . 7
4.2 Protocol Architecture . 8
5 MBMS NAS Layer Operations . 9
5.1 MBMS Mobility Management procedures . 9
5.1.1 GPRS Attach to BM Domain . 9
5.1.1.1 Successful GPRS Attach Procedure . 9
5.1.1.2 Unsuccessful GPRS Attach Procedure . 10
5.1.2 GPRS Detach . 10
5.1.2.0 General . 10
5.1.2.1 CN-initiated GPRS Detach Request . 10
5.1.2.2 UE-initiated GPRS Detach Request . 11
5.2 MBMS Service Management Procedures . 12
5.2.1 MBMS Service Activation . 12
5.2.1.0 General . 12
5.2.1.1 MBMS Context Activation . 12
5.2.1.2 CN-initiated MBMS Context Activation . 13
5.2.1.3 Unsuccessful MBMS Context Activation (Service not authorized) . 14
5.2.1.4 Unsuccessful MBMS Context activation (Critical failure or Layer 2 establishment rejection) . 14
5.2.2 MBMS Context Deactivation . 15
5.2.2.0 General . 15
5.2.2.1 UE Initiated MBMS Context Deactivation . 15
5.2.2.2 Core Network Initiated MBMS Context Deactivation . 16
5.3 MBMS Bearer Management procedures . 16
5.3.1 Radio Access Bearer Release. 16
5.3.2 MBMS Radio Access Bearer Release . 17
5.3.3 MBMS Radio Access Bearer Modify . 17
5.3.4 MBMS Radio Access Bearer Modification Request . 17
5.3.5 MBMS Service modification . 18
5.3.6 MBMS Service Removal . 19
6 Mobility Management Behaviour . 20
6.1 Spot Beam Handover. 20
6.2 Inter-RNC operation (via different satellites) . 21
6.3 Inter-system mobility . 21
7 Exception handling . 21
7.1 Forced Detach (CN Initiated) . 21
7.2 Primary PDP Context deactivation (while MBMS Contexts present) . 21
8 IP User Plane Handler for MBMS Services . 22
8.0 General . 22
8.1 UE-TE Controller triggered MBMS Services via R-interface . 22
8.1.1 Activation of MBMS Services . 22
8.1.2 Deactivation of MBMS Services . 22
8.2 Directly Connected TEs - use of IGMP as a trigger . 22
ETSI

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4 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
8.2.0 General . 22
8.2.1 Joining and leaving multicast services . 22
8.2.2 Maintenance of multicast services - IGMP query mechanism . 23
8.3 Routers in the mobile domain - PIM-SM triggered MBMS Services . 23
8.3.1 Joining and leaving multicast services . 23
8.3.2 Source Specific Multicast (SSM) and Any Source Multicast (ASM) with Rendezvous point in the
terrestrial domain . 23
8.3.2.0 General . 23
8.3.2.1 Multicast Receivers with a Mobile Domain Router . 24
8.3.2.2 ASM Multicast Sources with a Mobile Domain Router . 25
8.3.2.3 SSM Multicast Sources with a Mobile Domain Router . 26
8.3.3 Rendezvous Point in the Mobile Domain . 27
8.3.3.0 General . 27
8.3.3.1 Multicast Receivers with a Mobile Domain Rendezvous Point . 28
8.3.3.2 Multicast Sources with a Mobile Domain Rendezvous Point . 28
8.3.4 Maintenance of IP-Multicast Services using PIM-SM . 29
8.4 BMSC triggered MBMS Services . 29
History . 30

ETSI

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5 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
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 (http://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 Technical Committee Satellite Earth Stations and
Systems (SES).
The present document is part 3, sub-part 8 of a multi-part deliverable. Full details of the entire series can be found in
ETSI TS 102 744-1-1.
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.
Introduction
This multi-part deliverable (Release 1) defines a satellite radio interface that provides UMTS services to users of UEs
via geostationary (GEO) satellites in the frequency range 1 518,000 MHz to 1 559,000 MHz (downlink) and
1 626,500 MHz to 1 660,500 MHz and 1 668,000 MHz to 1 675,000 MHz (uplink).
ETSI

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6 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
1 Scope
The present document defines the operation of Multimedia Broadcast Multicast Services (MBMS) in support of
efficient delivery of IP multicast traffic across the Family SL satellite radio interface. This includes extensions to the
Non-Access Stratum (NAS) Layer peer-to-peer interface (defined in ETSI TS 124 007 [1] and ETSI TS 124 008 [2])
between the User Equipment (UE) and a new architectural entity defined as the Broadcast Multicast Service Node
(BMSN). In addition, extensions to the IP User Plane Handler (UPH) to interpret IP multicast management and routing
protocols are defined in the present document to allow automated triggering of MBMS services as defined for the
Family SL satellite radio interface.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 124 007: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Mobile radio interface signalling layer 3; General Aspects
(3GPP TS 24.007 Release 4)".
[2] ETSI TS 124 008: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); Mobile radio interface Layer 3 specification; Core network
protocols; Stage 3 (3GPP TS 24.008 Release 4)".
[3] ETSI TS 102 744-1-4: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 1: General Specifications; Sub-part 4: Applicable External
Specifications, Symbols and Abbreviations".
[4] ETSI TS 102 744-3-2: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 2: Bearer
Control Layer Operation".
[5] ETSI TS 102 744-3-6: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 6: Adaptation
Layer Operation".
[6] ETSI TS 102 744-3-7: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 7: NAS Layer
Interface Extensions for MBMS Services".
ETSI

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7 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
reference document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 123 246: "Universal Mobile Telecommunications System (UMTS); Multimedia
Broadcast/Multicast Service (MBMS); Architecture and functional description (3GPP TS 23.246
Release 7)".
3 Abbreviations
For the purposes of the present document, the abbreviations in clause 3 of ETSI TS 102 744-1-4 [3] apply.
4 Introduction
4.1 Network Architecture
Figure 4.1 presents the network architecture of this multi-part deliverable (Release 1) illustrating the entities which are
responsible for the provision of Multimedia Broadcast Multicast Services (MBMS). This includes:
• the Broadcast Multicast Service Node (BMSN), which contains the agents for the Non-Access Stratum
signalling and for replication of traffic associated with MBMS via multiple RNCs; and
• the Broadcast Multicast Service Centre (BMSC), which contains the Broadcast Multicast Management
Function (BMMF) responsible for control of access to MBMS Services.

Figure 4.1: Network architecture showing BM domain entities
The Gmb interface is used to control access to the Multimedia Broadcast and Multicast Services (MBMS) that are
offered by the Broadcast Multicast domain of the Core Network (the BMSN and the BMSC). This interface performs
the functions as defined in ETSI TS 123 246 [i.1] and in addition provides capabilities that allow the features of the
satellite-specific elements of the multicast services to be administered by the BMMF within the BMSC (not shown in
these diagrams as it is a functional entity within the BMSC).
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8 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
4.2 Protocol Architecture
The function of the satellite radio interface NAS Layer is to provide support to the IP User Plane Handler (UPH). The
NAS Layer uses the services provided by the Adaptation Layer (AL). Figure 4.2 illustrates the position of the NAS
Layer within the Family SL air interface protocol stack. An overview of the radio interface layering and relationship to
the NAS Layer is provided in ETSI TS 102 744-3-7 [6], clause 4.1.
The present document defines the operation of the extension to the NAS Layer peer-to-peer interface (defined in
ETSI TS 124 007 [1] and ETSI TS 124 008 [2]) between the RNC and the UE that is required in order to support the
Family SL implementation of MBMS, as shown in Figure 4.2.
IP
IP
IGMP/PIM-SM
UPH UPH
NAS Layer Messages
BMSM BMSM
RABM/
MRABM
BMM BMM
Non-Access Stratum
RE LA Y
AL AL RANAP RANAP
Lower Lower
Lower Layers Lower Layers
Layers Layers
Access Stratum
UE RNC CN
U I
sl u

Figure 4.2: Satellite Network Higher Layers (NAS and IP)
The NAS Layer is responsible for the following:
• Radio Access Bearer Management;
• MBMS Radio Access Bearer Management;
• Broadcast Multicast Mobility Management (BMM);
• Broadcast Multicast Session Management (BMSM).
Protocol entities in the BM domain of the NAS Layer use message transport services provided by the Adaptation Layer
to communicate with their peers through a single Service Access Point (SAP):
• BMMAL-SAP: BMM to Adaptation Layer Service Access Point Broadcast Multicast (BM) domain.
This SAP inherits functionality from the GMMAL-SAP described in detail in ETSI TS 102 744-3-6 [5].
The NAS Layer functionality described in the present document constitutes an extension to the 3GPP Session
Management behaviour, with the full functionality of the Session Management entity and these extensions being
implemented in the BMSM entity. In addition, extensions to the User Plane Handler to support interpretation of IP
multicast related signalling protocols are described in the present document.
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9 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
5 MBMS NAS Layer Operations
5.1 MBMS Mobility Management procedures
5.1.1 GPRS Attach to BM Domain
5.1.1.1 Successful GPRS Attach Procedure
The GPRS Mobility Management Procedures and Security Mode Procedures which operate towards the PS domain are
utilized for the BM Domain. If a combined PS/CS Attach procedure is employed to minimize signalling across the radio
interface, then the GMM signalling is directed to the PS domain and the mobility management state is locally
transferred (within the UE protocol stack) to the BMM and MM entities for the BM and CS domain respectively;
otherwise independent GPRS Attach procedures are applied for the PS and BM domains and a separate mobility
management state is maintained in the BMM and GMM entities.

TE UE RAN BMSN BMMF/ HLR
2. UDT (ATTACH REQUEST
1. AT+CGATT=1
RANAP ATTACH
3. B : IUEM(


(IMSI))
EQUEST 4. GPRSATTACH REQUEST
R (IMSI))

(IMSI)


RANAP
6. B :
TTACH CCEPT
 5. GPRSA A


OMMON
C ID(IMSI)


7. BRANAP: DT



(ATTACH ACCEPT)
8. DDT:


(ATTACH ACCEPT)

9. AT: OK




Figure 5.1: Successful GPRS Attach procedure towards the BM domain
The procedure is illustrated in Figure 5.1 and described as follows:
1) The Attach Request procedure may be initiated by an external AT Command sent to the UE (or the UE may be
configured internally to attach to the BM domain on power-up).
2) The UE initiates the GPRS Attach procedure by sending an Attach Request (IMSI) to the PS Domain of Core
Network encapsulated in an UplinkDirectTransfer AL message.
3) The RAN creates an IuConnectionIdentifier handler for the UE and forwards the Attach Request (IMSI)
message to the BMSN encapsulated in an Initial_UE_Message.
4) The BMSN creates a handler for this Iu signalling connection and associates it to the IMSI. It then creates and
sends a GPRS Attach Request to the BMMF to verify if this IMSI is provisioned in the system (full Identity
Check and Security Mode procedures may be applied at this stage).
5) If the IMSI is provisioned and allowed to access the BM domain then the BMMF sends a GPRS Attach Accept
to the BMSN.
6) he BMSN creates a CommonID (IMSI) message and sends it to the RAN via the newly created Iu Signalling
connection. This informs the RNC of the permanent NAS identity (IMSI) of a user and allows the RNC to
create a reference between the IMSI and the UE Specific Signalling connection.
7) The BMSN sends a GPRS Attach Accept to the UE encapsulated in a Direct Transfer Iu message.
8) The RAN forwards the Attach Accepts message to the UE which updates its GMM state.
9) The initiator of the AT Command receives an OK in response to its initial command, acknowledging the
successful completion of the procedure (if the command was initiated by the TE).
At the conclusion of the GPRS Attach and Security Mode Procedures, the signalling connection between the UE and the
BM domain is available and secured for BM Session Management operation, as defined in clause 5.2.
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10 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
5.1.1.2 Unsuccessful GPRS Attach Procedure
An unsuccessful GPRS Attach procedure may occur for a number of reasons, including:
1) The IMSI for the UE is not provisioned for operation with the BM domain;
2) Security mode procedures fail;
3) Communications within the Access Stratum are unreliable.
Until the GPRS Attach Procedure towards the BM succeeds (or a Combined Attach procedure succeeds), no further
BMSM signalling can take place.
5.1.2 GPRS Detach
5.1.2.0 General
The GPRS Detach procedure may be initiated by either the User Equipment or the Core Network to remove the
mobility management association between the UE and the CN.
5.1.2.1 CN-initiated GPRS Detach Request
If the UE was attached to multiple domains using a combined Attach procedure, a GPRS Detach procedure initiated by
any of the Core Network domains will result in loss of connectivity between the UE and all Core Network Domains,
including the BM Domain.
If the UE utilized a specific Attach procedure towards the BM domain, then the UE shall only modify the mobility
management state held in the BMM entity in response to a GPRS Detach procedure initiated by the BM domain,
Upon reception of a GPRS Detach Request initiated by the BM Domain of the Core Network, the UE shall
acknowledge the Detach Request to the BM Domain. All PDP Context information shall be implicitly deleted by both
the UE and the CN, and all RABs shall be considered implicitly deleted by the UE. The CN shall issue an IuSignalling
Connection Release Request, and all RABs shall be considered implicitly deleted by the RAN.


BMMF

TE UE RAN
  BMSN

1. MANAGEMENT COMMAND


RANAP DT
2. B :

(DETACH UE)

DDT ETACH EQUEST
3. : (D R ) (DETACH REQUEST)


4. UDT (DE TACH ACCEPT)

RANAP ETACH
5. B : DT(D

CCEPT
A )

All PDP contexts &
Bearer Contexts
6. BRANAP: IU RELEASE
All Contexts and
released implicitly
OMMAND
C

RABs released
implicitly
 7. BRANAP : IU RELEASE

COMPLETE

All RABs
released
impli citly


Figure 5.2: BM domain-initiated GPRS Detach Request
The procedure is illustrated in Figure 5.2 and described as follows:
1) A management entity, such as the BMMF issues a management command instructing the BMSN to detach an
UE.
2) The BMSN initiates a Detach Request towards the UE.
3) Upon receipt of the Detach Request on the interface, the UE GMM enters into PMM-Detached state.
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11 ETSI TS 102 744-3-8 V1.1.1 (2015-10)
4) The UE deletes all connection state and responds to the BMSN by forwarding a Detach_Accept message via
the RAN encapsulated in an Uplink Direct Transfer message.
5) The RAN sends this NAS message to the BMSN via the IuBM interface in a Direct Transfer Iu container.
6) The BMSN initiates an Iu Release Command to remove the UE-specific signalling connection between the
RAN and the PS domain of the CN.
7) The RNC implicitly releases all RABs and completes the Iu Release command.
5.1.2.2 UE-initiated GPRS Detach Request
If the UE utilized a combined Attach procedure, then the Detach procedure will be directed to the PS domain.
If the UE utilized a specific Attach procedure to obtain access to the BM domain, then the UE shall initiate a specific
GPRS Detach procedure towards the BM domain.
All connection states within the UE are deleted implicitly.

BMMF

TE UE RAN  BMSN

1. AT+CGACT=0


3. BRANAP: DT
2. U : (D R )
DT ETACH EQUEST



(DE TACH R EQUEST)

4. BRANAP: DT (DETACH

ACCE PT)
5. DDT (DETACH ACCE PT)

All PDP contexts&
6. AT OK


Bearer Contexts
7 . B : I R
RANAP U ELEASE

C released implicitly
OMMAND

8. BRANAP: IU RELEASE

COMPLETE

All Contexts and
RABs released
implicitly All RABs

released
implicitly


Figure 5.3: UE-initiated GPRS Detach Procedure
The procedure is illustrated in Figure 5.3 and described as follows:
1) A trigger (AT command) requests the UE to detach from the Core Network.
2) The UE GMM entity enters in PMM-detached state and initiates a Detach Request towards the BMSN via the
RAN in an Uplink Direct Tran
...