ETSI TS 186 020 V3.1.1 (2011-07)

Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based IPTV interoperability test specification

RTS/TISPAN-06061-NGN-R3

General Information

• Status: Published
• Publication Date: 28-Jul-2011
• Technical Committee: TISPAN 6 - TISPAN Testing
• Current Stage: 12 - Completion
• Due Date: 05-Aug-2011
• Completion Date: 29-Jul-2011

Standards Content (Sample)

Technical Specification
Telecommunications and Internet converged Services and
Protocols for Advanced Networking (TISPAN);
IMS-based IPTV interoperability test specification

2 ETSI TS 186 020 V3.1.1 (2011-07)

Reference
RTS/TISPAN-06061-NGN-R3
Keywords
IMS, interoperability, IPTV, testing
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ETSI
3 ETSI TS 186 020 V3.1.1 (2011-07)
Contents
Intellectual Property Rights . 6
Foreword . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Abbreviations . 8
4 IMS-based IPTV Interoperability Test Specification . 9
4.1 Introduction . 9
4.2 Test Prerequisites . 9
4.2.1 IP Version and protocols . 9
4.2.1.1 IP . 9
4.2.1.2 RTSP . 9
4.2.1.3 SIP . 9
4.2.1.4 IGMP . 9
4.2.1.5 Media transport . 9
4.2.2 Authentication and Security . 10
4.2.2.1 SIP . 10
4.2.2.2 HTTP . 10
4.2.3 Supported Options . 10
4.2.3.1 Signalling Compression . 10
4.2.3.2 SIP Provisional Message Reliability . 10
4.2.3.3 SIP precondition option tag . 10
4.2.3.4 SIP timer option tag (Session Timers) . 10
4.2.4 Content related options . 10
4.2.4.1 Encrypted contents . 10
4.2.4.2 Digital Rights Management . 10
4.2.4.3 FEC . 10
4.2.5 Service discovery . 10
4.2.6 Miscellaneous . 11
4.2.6.1 Network Address Translation (NAT) and Firewall function . 11
4.3 Test Architecture . 11
4.3.1 IPTV Nodes . 12
4.3.1.1 Core IMS . 12
4.3.1.1.1 Relevant Reference Points . 12
4.3.1.1.2 Node Configuration . 12
4.3.1.2 IPTV aware UE . 12
4.3.1.2.1 Relevant Reference Points . 12
4.3.1.2.2 Node Configuration . 12
4.3.1.3 IPTV Application Server (AS) . 12
4.3.1.3.1 Relevant Reference Points . 12
4.3.1.3.2 Node Configuration . 12
4.3.1.4 OMA Instant Messaging and Presence Service (AS) . 12
4.3.1.5 Content on Demand Server (CoDS) . 13
4.3.1.5.1 Relevant Reference Points . 13
4.3.1.5.2 Node Configuration . 13
4.3.1.6 Personal Video Recorder Server (PVRS) . 13
4.3.1.6.1 Relevant Reference Points . 13
4.3.1.6.2 Node Configuration . 13
4.3.1.7 Transport and Access (T&A) . 13
4.3.1.7.1 Relevant Reference Points . 13
4.3.1.7.2 Node Configuration . 13
4.3.2 External Nodes . 13
4.3.2.1 TV Head End . 13
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4 ETSI TS 186 020 V3.1.1 (2011-07)
4.3.2.1.1 Relevant Reference Points . 14
4.3.2.2 Node Configuration . 14
4.3.2.3 Time Shifted TV Server . 14
4.3.2.3.1 Relevant Reference Points . 14
4.3.2.4 Node Configuration . 14
4.3.2.5 Advertising Nodes . 14
4.3.2.5.1 Internal Advertising Nodes . 14
4.3.2.5.2 SCTE-130 Advertising Nodes . 14
4.3.2.5.2.1 Relevant Reference Points . 14
4.3.2.5.3 OMA MobAd Advertising Nodes . 14
4.3.3 Summary of interfaces and protocols. 15
4.3.4 Method 1 and Method 2 . 15
4.4 Test Descriptions . 15
4.4.1 Service Attachment, Service Discovery and Selection . 17
4.4.1.1 Manual configuration of SSF information in pull mode . 18
4.4.1.2 Automatic provisioning of SSF in pull mode . 19
4.4.1.3 Automatic provisioning of SSF in push mode . 20
4.4.2 Broadcast TV . 21
4.4.2.1 Session initiation without RACS. 21
4.4.2.2 Channel Zapping without RACS . 22
4.4.2.3 Session termination without RACS . 23
4.4.2.4 Session initiation with RACS . 24
4.4.2.5 Channel Zapping with RACS . 25
4.4.2.6 Session termination with RACS . 26
4.4.3 Broadcast TV with trick-play using Method 1 . 26
4.4.3.1 Initiate trick-play on a live broadcast channel . 27
4.4.3.2 Play in trick-play mode . 28
4.4.3.3 Simple fast forward trick-play. 29
4.4.3.4 Fast backward trick-play to beginning of recorded content . 30
4.4.3.5 Fast forward to move from trick-play to live broadcast mode . 31
4.4.4 Broadcast TV with trick-play using Method 2 . 32
4.4.4.1 Initiate trick-play on a live broadcast channel . 33
4.4.4.2 Play in trick-play mode . 35
4.4.4.3 Simple fast forward trick-play. 36
4.4.4.4 Fast backward trick-play to beginning of recorded content . 37
4.4.4.5 Fast forward to move from trick-play to live broadcast mode . 38
4.4.5 Content on Demand (CoD) using Method 1 . 40
4.4.5.1 Start CoD . 40
4.4.5.2 Pause CoD with trick-play . 42
4.4.5.3 Play CoD in trick-play mode . 42
4.4.5.4 Simple fast forward of CoD using trick-play . 43
4.4.5.5 Simple fast backward on CoD using trick-play . 44
4.4.5.6 Jump to specific location in CoD content . 45
4.4.5.7 Quit watching CoD . 46
4.4.5.8 Resume CoD . 47
4.4.5.9 CoD termination by IPTV AS . 48
4.4.5.10 End of CoD . 49
4.4.6 Video on Demand (CoD) using Method 2 . 50
4.4.6.1 Start CoD . 50
4.4.6.2 Pause CoD with trick-play . 53
4.4.6.3 Play CoD with trick-play . 54
4.4.6.4 Fast forward CoD using trick-play . 55
4.4.6.5 Fast backward CoD using trick-play . 56
4.4.6.6 Jump to specific location in CoD content . 57
4.4.6.7 Terminate CoD . 58
4.4.6.8 Resume CoD . 60
4.4.6.9 CoD termination by IPTV AS . 64
4.4.6.10 CoD termination at the end of stream . 65
4.4.7 NPVR using Method 1 . 66
4.4.7.1 Impulsive recording request . 66
4.4.7.2 Scheduled recording request . 68
4.4.7.3 Watching a recorded nPVR content . 70
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5 ETSI TS 186 020 V3.1.1 (2011-07)
4.4.8 NPVR - Method 2 . 72
4.4.8.1 Impulsive recording request . 72
4.4.8.2 Scheduled recording request . 74
4.4.8.3 Watching a recorded content . 76
4.4.9 User General Content (UGC). 79
4.4.9.1 UGC declaration procedures . 80
4.4.9.2 UGC creation procedures . 81
4.4.9.3 UGC watching procedures . 83
4.4.9.3.1 UGC watching procedures: Pre-selection (using Method 2) . 83
4.4.9.3.2 UGC watching procedures: selection through the SSF (using Method 1) . 85
4.4.10 Sending Notification . 86
4.4.10.1 Notification in Signalling path . 87
4.4.11 Instant Messaging . 87
4.4.11.1 Instant Messaging Sending . 88
4.4.11.2 Instant Messaging Receiving . 89
4.4.12 PushCoD . 89
4.4.12.1 UE-initiated Content download for unicast download . 90
4.4.12.2 UE-initiated Content download for unicast progressive download . 91
4.4.13 Targeted Ad Insertion (TAI) - SCTE . 91
4.4.13.1 TAI by notification at UE side . 91
4.4.13.2 TAI by content insertion at UE side . 92
4.4.13.3 TAI by content insertion at MF side . 93
4.4.14 Emergency Information . 93
4.4.14.1 Emergency Information by Notification . 94
4.4.14.2 Emergency Information by Content Insertion . 95
4.4.15 Incoming call management . 95
4.4.15.1 Incoming call notification . 96
4.4.15.2 Incoming call handling . 96
4.4.15.3 Incoming call rejection . 96
4.4.15.4 Incoming call acceptance on IPTV UE . 97
4.4.15.5 Incoming call forwarding to other UE . 98
4.4.16 Time Shifted TV . 100
4.4.17 Parental Control . 100
4.4.17.1 Parental Control applied for BC . 100
4.4.17.2 Parental Control applied for CoD . 100
4.4.17.3 Parental Control applied for UGC . 100
4.4.17.4 Parental Control applied for PVR . 100
4.4.18 Content Marker Service (CM) . 100
4.4.18.1 Creating, updating and querying Content Marker (CM) . 100
4.4.18.2 Removing Content Marker (CM) . 102
4.4.19 Content Recommendation (CR) . 102
4.4.20 Presence . 102
4.4.20.1 Subscribing to presence . 103
4.4.20.2 Receiving presence notifications . 104
4.4.21 Service Continuation. 104
4.4.21.1 Service Continuation between IPTV UEs . 105
Annex A (informative): Bibliography . 107
Annex B (informative): Change history . 108
History . 109

ETSI
6 ETSI TS 186 020 V3.1.1 (2011-07)
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 Telecommunications and Internet
converged Services and Protocols for Advanced Networking (TISPAN).
ETSI
7 ETSI TS 186 020 V3.1.1 (2011-07)
1 Scope
The present document specifies interoperability tests for IMS-based IPTV system for NGN Release 3. It covers the use
of main IPTV functionality via different methods as defined in NGN Release 2 as well as NGN Release 3 new use cases
and features for IPTV and possible interactions with Voice/Data communications such as Social TV, Incoming Voice
call management and notification on TV screen. Interoperability test descriptions have been specified following the
ETSI IPT test specification framework described in EG 202 568 [i.1] and interoperability testing methodology defined
in EG 202 237 [i.2], i.e. interoperability testing with a conformance relation. Each interoperability test description
includes an end user test sequence as well as a table for checking of high level message flows at key standardized
reference points in the TISPAN IMS-based IPTV infrastructure [1] and [2].
2 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.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 182 027 (V3.4.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); IPTV Architecture; IPTV functions supported by the IMS
subsystem".
[2] ETSI TS 183 063 (V3.5.2): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); IMS-based IPTV stage 3 specification".
[3] IETF RFC 2326: "Real Time Streaming Protocol (RTSP)".
[4] IETF RFC 3261: "SIP: Session Initiation Protocol".
[5] ETSI TS 102 034: "Digital Video Broadcasting (DVB); Transport of MPEG-2 TS Based DVB
Services over IP Based Networks".
[6] IETF RFC 3376: "Internet Group Management protocol, Version 3".
[7] IETF RFC 2616: "Hypertext Transfer Protocol - HTTP/1.1".
[8] ETSI TS 183 048: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Resource and Admission Control System (RACS); Protocol
Signalling flows specification; RACS Stage 3".
[9] ETSI TS 183 017 (V2.3.1): "Telecommunications and Internet converged Services and Protocols
for Advanced Networking (TISPAN); Resource and Admission Control: DIAMETER protocol for
session based policy set-up information exchange between the Application Function (AF) and the
Service Policy Decision Function (SPDF); Protocol specification".
[10] ETSI TS 102 539: "Digital Video Broadcasting (DVB); Carriage of Broadband Content Guide
(BCG) information over Internet Protocol (IP)".
[11] ETSI TS 102 323: "Digital Video Broadcasting (DVB); Carriage and signalling of TV-Anytime
information in DVB transport streams".
ETSI
8 ETSI TS 186 020 V3.1.1 (2011-07)
[12] ETSI TS 181 016: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Service Layer Requirements to integrate NGN Services and
IPTV".
[13] ETSI ES 283 030: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); Presence Service Capability; Protocol Specification
[3GPP TS 24.141 V7.0.0, modified and OMA-TS-Presence-SIMPLE-V1-0, modified]".
[14] OMA-TS-SIMPLE-IM-V1-0-20100322-C:"OMA: Instant Messaging using SIMPLE".
2.2 Informative references
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 EG 202 568: "Methods for Testing and Specification (MTS); Internet Protocol Testing
(IPT); Testing: Methodology and Framework".
[i.2] ETSI EG 202 237: "Methods for Testing and Specification (MTS); Internet Protocol Testing
(IPT); Generic approach to interoperability testing".
[i.3] K. Taniguchi and K. Ishikawa: "MSF IMS-based IPTV Test Plan for GMI 2008", Multi Service
Forum (MSF) contribution 2008.169.06.
[i.4] SCTE-130 part 1: "Advertising Systems Overview".
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partnership Project
A-RACS Access - Resource and Admission Control Subsystem
AAA AA-Answer
AAR AA-Request
AS (IMS) Application Server
BC Broadcast
CF (Test) Configuration
CoD Content On Demand
CoDS Content on Demand Server
CSCF Call Session Control Function
EPG Electronic Program Guide
FEC Forward Error Correction
I-CSCF Interrogating CSCF
IGMP Internet Group Management Protocol
IMS IP Multimedia Subsystem
IP Internet Protocol
IP EN IP Edge Node
IPTV Internet Protocol Television
MCF Media Control Function
MDF Media Delivery Function
MLD Multicast Listener Discovery
nPVR network-side Personal Video Recorder
P-CSCF Proxy CSCF
PO Point of Observation
PVRS Personal Video Recorder Server
RCEF Resource Control Enforcement Function
RTSP Real Time Streaming Protocol
S-CSCF Serving CSCF
SIP Session Initiation Protocol
SDP Session Description Protocol
ETSI
9 ETSI TS 186 020 V3.1.1 (2011-07)
SCF Service Control Function
SDF Service Discovery Function
SPDF Service-based Policy Decision Function
SSF Service Selection Function
STA Session-Termination-Answer
STR Session-Termination-Request
T&A Transport and Access
TCP Transmission Control Protocol
TD Test Description
TISPAN Telecommunications and Internet converged Services and Protocols for Advanced Networking
UGC User Generated Content
UE User Equipment
UPSF User Profile Server Function
URI Uniform Record Identifier
4 IMS-based IPTV Interoperability Test Specification
4.1 Introduction
The IMS-based IPTV interoperability test descriptions (TDs) defined in the following clauses are mainly derived from
MSF 2008.169.06 [i.3], TS 183 063 [2] and TS 182 027 [1]. More specifically, these TDs focus on SIP/SDP [5],
HTTP [7], RTSP [4], IGMP [6] related messaging procedures without RACS described in clauses 5, 6, 7, 8 and 11 of
TS 183 063 [2]. TDs where RACS is involved are described in part in TS 183 048 [8].
The use of FLUTE and DVBSTP transport protocols on Xa reference point as well as IPv6 MLD are at this point not
within the scope of the present document.
4.2 Test Prerequisites
4.2.1 IP Version and protocols
4.2.1.1 IP
The present document assumes that IP-based protocols all use IPv4.
4.2.1.2 RTSP
The present document assumes RTSP [3] messages are sent only via TCP.
4.2.1.3 SIP
The present document assumes that all SIP [4] messages are sent via UDP to ensure retransmission procedures based on
SIP only and to simplify the match procedure between the message flows and real network capture.
4.2.1.4 IGMP
The present document assumes that IPTV aware UE requests for multicast group use IGMPv3 [6].
4.2.1.5 Media transport
The present document assumes that content is transported using one of the following transport technologies: MPEG2TS
encapsulation or direct RTP transport (e.g. H264 over RTP). Further it is assumed that transport of IPTV content within
MPEG2-TS layer over RTP and UDP is performed according the procedures defined in TS 102 034 [5].
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10 ETSI TS 186 020 V3.1.1 (2011-07)
4.2.2 Authentication and Security
4.2.2.1 SIP
The present document assumes that no SIP-based authentication is performed.
4.2.2.2 HTTP
Personalized service selection is out of the scope of the document. Hence, no HTTP authentication is required from the
UE toward SSF or SCF. Also no authentication proxy is needed between the UE and the SCF.
4.2.3 Supported Options
4.2.3.1 Signalling Compression
"No SigComp" is the default signalling configuration in all test descriptions. Tests may be executed with signalling
compression if the required nodes support it.
4.2.3.2 SIP Provisional Message Reliability
The present document assumes there is no use of SIP 100rel option tag.
4.2.3.3 SIP precondition option tag
The present document assumes there is no use of SIP precondition option tag.
4.2.3.4 SIP timer option tag (Session Timers)
The present document assumes there is use of SIP timer option tag which supports session timer extension. The
inclusion of this option tag in a Supported header field of a SIP request or response indicates that the UE is capable of
performing refreshes. The inclusion of this option tag in a Require header of a SIP request indicates that the IMS core
network should understand the session timer extension to process the request. Its inclusion in a Require header field of a
SIP response indicates that the UE should look for the Session-Expires header field in the response and process it
according to [4].
4.2.4 Content related options
4.2.4.1 Encrypted contents
The present document assumes that encryption is not used for CoD or BC content provisioning.
4.2.4.2 Digital Rights Management
The present document assumes DRM is not used for CoD or BC content provisioning.
4.2.4.3 FEC
The present document assumes that FEC disabled for CoD and BC content provisioning.
4.2.5 Service discovery
Service discovery should follow the procedures defined in TS 102 539 [10] and TS 102 323 [11].
ETSI
11 ETSI TS 186 020 V3.1.1 (2011-07)
4.2.6 Miscellaneous
4.2.6.1 Network Address Translation (NAT) and Firewall function
The present document assumes there is neither NAT nor Firewall function activated.
4.3 Test Architecture
In figure 1, various nodes of an IMS-based IPTV system that pertain to testing are introduced. For each node
configuration is described and relevant points of observation (POs) are identified. Based on these nodes a static test
architecture is defined. Figure 1 shows the abstract test architecture of an IMS-based IPTV system based on the general
IPTV architecture defined in [2], [8] and [9].
IPTV AS
IPTV
Xa
OMA IM&P AS
SDF
UE
SSF
AD
Ad subsystem
SCF
Ut
CoDS
Cod-MCF
ISC
UPSF
Xp
CoD-MDF
Gm
Core IMS
I-CSCF
PVRS
nPVR-MCF
y2
P-CSCF S-CSCF
Xp
nPVR-MDF
Gq'
e2
TsTV -MCF TsTVS
Xp
T&A
TsTV -MDF
SPDF
TV Head
A-RACS
Dj, Xc BC-MCF
NASS
End
RCEF
BC-MDF
IP EN
Xp
Xd
Figure 1: IMS-based IPTV test architecture (referred as CF_IMS_IPTV)
In figure 1, each node groups different IPTV logical functions. Interfaces within each node are considered internal and
not taken into account in conformance criteria. It may however be of interest to also monitor these internal interfaces for
debugging purposes.
Reference points (Ut, e2 and y2 towards BC-MCF) in dotted line are not in the scope of the present document.
NOTE: In a real IMS-based IPTV system some of the nodes shown in figure 1 may also be collocated in the same
equipment. In this case it is however still assumed that their connecting interfaces are still available for
monitoring purposes.
Each node framed with a solid line is considered Equipment under Test (EUT) in the context of the ETSI
interoperability testing methodology [i.2]. The collection of all EUTs makes up the System Under Test (SUT). Dashed
nodes indicate other equipment, i.e. support nodes, required to execute at least some of the tests. The latter nodes are
considered not to be part of the SUT.
ETSI
12 ETSI TS 186 020 V3.1.1 (2011-07)
4.3.1 IPTV Nodes
4.3.1.1 Core IMS
This node contains P-CSCF, I-CSCF and S-CSCF functions as well as potentially (a part of) the UPSF.
4.3.1.1.1 Relevant Reference Points
The Gm reference point between the IMS Core and the IP aware UE is used as a point of observation (PO) for testing
purposes. The ISC reference point is between the IMS Core and IPTV AS and used as a PO for testing purposes. The y2
reference point is between the IMS Core and the PVRS and CoDS and used as a PO for testing purposes. The Gq'
reference point is between the IMS Core and T&A and is used as a PO for testing purposes.
4.3.1.1.2 Node Configuration
The Core IMS should be configured to support the pre-requisites outlined in clause 4.2.
The UPSF should be configured with the following user identities.
Private Identity Public Identity Public Identity 2 Default Public Filter criteria
(SIP URI) (Tel URI) Identity
userIPTV_priv userIPTV na 1 contact IPTV AS

4.3.1.2 IPTV aware UE
4.3.1.2.1 Relevant Reference Points
The Gm interface is used as a PO for interoperability tests towards the IMS Core.
The Xa interface is used as a PO for interoperability tests towards the IPTV AS.
The Xc and Xd (Dj) interfaces are used as POs for interoperability tests towards the PVRS, CoDS and TV Head End.
4.3.1.2.2 Node Configuration
The IP aware UE should be configured to support the pre-requisites outlined in clause 4.2.
4.3.1.3 IPTV Application Server (AS)
This node contains SSF, SDF, and SCF functions as well as may contain also (a part of) the UPSF.
4.3.1.3.1 Relevant Reference Points
The Xa interface is used as a PO towards the IPTV aware UE whereas the ISC interface is used as a PO towards the
IMS Core.
4.3.1.3.2 Node Configuration
The IPTV AS should be configured to support the pre-requisites outlined in clause 4.2.
The media content available in the PVRS, CoDS and TV Head End has to be described within the IPTV AS.
IPTV specific data information associated with the user has to be described within the IPTV AS [9].
4.3.1.4 OMA Instant Messaging and Presence Service (AS)
This node provides capabilities for Instant Messaging and Presence Service (TS 183 063 [2], clause 5.1.17.1).
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13 ETSI TS 186 020 V3.1.1 (2011-07)
4.3.1.5 Content on Demand Server (CoDS)
This node contains CoD-MCF and CoD-MDF functions and services based on CoD as UGC.
4.3.1.5.1 Relevant Reference Points
The y2 reference point is used as a PO between the Core IMS and the CoDS. The Xd reference point is used as PO
between the UE and the CoDS.
4.3.1.5.2 Node Configuration
The CoDS should be configured to support the pre-requisites outlined in clause 4.2.
The media contents as described in the EPGs have to be available on the CoDS.
4.3.1.6 Personal Video Recorder Server (PVRS)
This node contains nPVR-MCF and nPVR-MDF functions.
4.3.1.6.1 Relevant Reference Points
The y2 reference point is used as a PO between the Core IMS and the PVRS. The Xd reference point is used as PO
between the UE and the PVRS.
4.3.1.6.2 Node Configuration
The PVRS should be configured to support the pre-requisites outlined in clause 4.2.
The media contents as described in the EPGs have to be available on the PVRS.
4.3.1.7 Transport and Access (T&A)
This node contains transport control and processing functions, A-RACS, SPDF, NASS and RCEF. The latter is located
in the IP-Edge Node.
4.3.1.7.1 Relevant Reference Points
The Xd, Xc and Dj reference points are used as POs between the UE and the transport node.
Gq' reference point is used as Pos between SPDF and CORE IMS.
4.3.1.7.2 Node Configuration
The T&A should be configured to support the pre-requisites outlined in clause 4.2.
Regarding multicast support, the function has to implement IGMPv3, IGMPv2 with SSM (source specific mapping) and
in case the multicast sources are not directly connected a CORE network a multicast pr
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