ETSI TR 122 906 V15.0.0 (2019-07)

Universal Mobile Telecommunications System (UMTS); LTE; Study on IMS based peer-to-peer content distribution services (3GPP TR 22.906 version 15.0.0 Release 15)

RTR/TSGS-0122906vf00

General Information

• Status: Published
• Publication Date: 22-Jul-2019
• Technical Committee: 3GPP SA 1 - Services
• Current Stage: 12 - Completion
• Completion Date: 23-Jul-2019

Standards Content (Sample)

ETSI TR 122 906 V15.0.0 (2019-07)






TECHNICAL REPORT
Universal Mobile Telecommunications System (UMTS);
LTE;
Study on IMS based peer-to-peer content distribution services
(3GPP TR 22.906 version 15.0.0 Release 15)

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3GPP TR 22.906 version 15.0.0 Release 15 1 ETSI TR 122 906 V15.0.0 (2019-07)



Reference
RTR/TSGS-0122906vf00
Keywords
LTE,UMTS
ETSI
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3GPP TR 22.906 version 15.0.0 Release 15 2 ETSI TR 122 906 V15.0.0 (2019-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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
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Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
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Legal Notice
This Technical Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities. These shall be
interpreted as being references to the corresponding ETSI deliverables.
The cross reference between 3GPP and ETSI identities can be found under http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be
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"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TR 22.906 version 15.0.0 Release 15 3 ETSI TR 122 906 V15.0.0 (2019-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 4
Introduction . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 General Description . 6
4.1 Overview . 6
5 Use Cases . 8
5.1 Content-on-Demand Service for Large numbers of Online Users . 8
5.1.1 Service Description . 8
5.1.2 Service Benefit . 9
5.2 Live Streaming Service for Large numbers of Online Users . 9
5.2.1 Service Description . 9
5.2.2 Service Benefit . 10
5.3 Efficient Software Distribution to large numbers of Users . 10
5.3.1 Service Description . 10
5.3.2 Service Benefit . 11
6 P2P Content Distribution Service Considerations in Fixed and Mobile Network . 11
6.1 Considerations on Types of User Equipment . 11
6.2 Considerations on Types of Access Network . 12
6.2.1 Comparison of Different Access Networks . 12
6.2.2 Network Peer Deployment Based on Types of Access Network . 12
6.3 Interworking with the CDN . 12
7 Potential Service Requirements . 13
7.1 Requirements to the IMS CN subsystem . 13
7.2 Requirements to the IMS P2P application service . 13
8 Potential Charging Requirements . 13
9 Potential Security Requirements . 14
10 Copy rights Issues . 14
11 Conclusion . 14
Annex A: Change history . 15
History . 16

ETSI

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3GPP TR 22.906 version 15.0.0 Release 15 4 ETSI TR 122 906 V15.0.0 (2019-07)
Foreword
rd
This Technical Report 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.
Introduction
The development of fixed and mobile broadband technologies (e.g. G/E-PON allows about 100Mbps downlink and
100Mbps uplink, LTE allows the possibility of the speed up to 100Mbps downlink and 50 Mbps uplink) and more and
more powerful mobile handsets have boosted popular usage of content distribution services (e.g. Live streaming and
Content on Demand) on mobile handsets.
With the explosive growth of media content consumption, the number of media servers to provide streaming services is
required to be increased almost linearly with the number of users. In addition, centralized streaming media servers
require considerable demands towards the bandwidth of the backbone IP network. So it's required to deploy more and
more edge servers close to UEs to guarantee service quality with the increasing number of users.
Peer-to-peer technology can be used between edge servers and UEs to relieve the above problem. Not only the edge
servers handle the requests from its locally served UEs, but also they can handle the requests transferred from the
neighbouring edge servers. Similarly, if the UE's capabilities permit, the UE can offer spare uplink bandwidth and
storage space while obtaining data, and uploads data to other requested destinations. Content is transmitted in a
segmented manner, and most of the traffic can be spread across the edge of the network, which helps reduce the storage
and bandwidth demands of centralized servers. So the system capability is improved along with the increasing number
of edge servers and UEs.
IMS, proposed by 3GPP, is viewed as a fixed and mobile convergence core network to provide multimedia services,
and defines an infrastructure for user authentication, registration, service discovery, and multimedia session control and
etc. So this Technical Report is aimed to study content distribution services in a Peer-to-Peer manner based on IMS
from SA1's perspective and it is expected to identify the use cases and potential service requirements.
ETSI

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3GPP TR 22.906 version 15.0.0 Release 15 5 ETSI TR 122 906 V15.0.0 (2019-07)
1 Scope
This Technical Report presents the overview, use cases and other aspects (e.g. Mobility, Charging, Security and etc.) of
IMS based Peer-to-Peer Content Distribution Services. And the potential service requirements will be identified. The
objectives are to study IMS based content distribution services with the following aspects:
- Identifying the user cases to describe how users, operators and service providers will may benefit by
using/deploying IMS based content distribution services in fixed and mobile convergence networks
with Peer-to-Peer technology;
- Identifying service aspects where IMS network improvements are needed to cater for content
distributed services for above accesses;
- Identifying mobility, charging and security related requirements in the case of content distribution
services on IMS;
- Identifying potential copyright issues;
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 TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 22.101: "Service Aspects; Service Principles".
[3] 3GPP TS 22.105: "Services and Service Capabilities".
[4] 3GPP TS 22.233: "Transparent end-to-end packet-switched streaming service; Stage 1".
[5] 3GPP TS 22.246: "Multimedia Broadcast/Multicast Service (MBMS) user services; Stage 1".
[6] 3GPP TS 22.115: "Service aspects; Charging and billing".
[7] 3GPP TS 22.220: "Service requirements for Home NodeBs and Home eNodeBs".
[8] 3GPP TS 21.201: "Technical Specifications and Technical Reports relating to an Evolved Packet
System (EPS) based 3GPP system".
[9] Open IPTV Forum release 2: "Functional Architecture".
http :// www.ope niptvforum.org/docs/OIPF-F unctio na l_ Arc h itecture_v2_0-2009-09-08.pdf
[10] ETSI TS 182 019 release 3: "TISPAN - Content Delivery Network (CDN) architecture".
[11] Draft ETSI RTS 182 027 release 3: "TISPAN - IPTV Architecture, IPTV functions supported by
the IMS subsystem".
[12] Draft ETSI TR 182 010:" Peer-to-peer for content delivery for IPTV services, analysis of
mechanisms and NGN impacts".
ETSI

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3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [x] and the following apply. A
term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [x].
Peer-to-Peer: A concept related to A distributed network architecture composed of participants that make a portion of
their resources (such as processing power, disk/cache storage or network bandwidth) directly available to other network
participants.
Peers: The entities (e.g. UE, network entity) of both suppliers and consumers of resources, in contrast to the traditional
client-server model where only servers supply, and clients consume.
User Peer: The UE type of participants in the Peer-to-Peer network both providing services to other participants and
requesting services from other participants, e.g. PC terminals.
Network Peer: The participants in the Peer-to-Peer network deployed and controlled by operators/service providers
both providing services to other participants (e.g. User Peer or Network Peer) and requesting services from other
participants, e.g. the cache server deployed by operators/service providers.
Content Source Server: An entity, which stores the source content, and provisions interface for other entities to fetch
content.
Content Cache Server: An entity, which caches partial/entire source content to be distributed to end users. The data
on Content Cache Server is obtained from the Content Source Server or other Content Cache Servers via pre-
distribution of the source content or upon users' request. The Content Cache Servers usually are deployed at the edge of
the network to accelerate content distribution.
Content Control Server: An entity, which performs the management of content indexing and control content
distribution (e.g. how the source content is distributed from the Content Source Server to the Content Cache Servers).
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [x] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
TR 21.905 [x].
P2P Peer-to-Peer
CDS Content Distribution Service
CoD Content on Demand
CDN Content Delivery Network
G-PON        Gigabit Passive Optical Network
E-PON Ethernet Passive Optical Network
WLAN Wireless Local Area Network
H(e)NB Home NodeB and Home eNodeB

4 General Description
4.1 Overview
The following figure explains the network elements involved in IMS based Peer-to-Peer Content Distribution service
and how they interact with each other.
IMS UEs initiate the content distribution service via fixed or mobile access network to IMS CN Subsystem. IMS UE
will be redirected to the portal, which offers content indexing, browsing and searching functionalities. The content is
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usually stored on content source servers (e.g. Network entities or UEs) and content cache servers are deployed close to
the users to accelerate content distribution.
User profile is stored in IMS and the terminal capabilities (e.g. processing capabilities, screen size) are stored in Peer-
to-Peer application service, when available. After IMS UEs request content distribution services, User Profile will
provide the P2P application service with the user's preferences and terminal capabilities will be used to decide whether
or not the client is capable of receiving the requested content. Content control is used to control how the content is
distributed in the network and where IMS UEs can get the requested content.


User Profile&

Content
Terminal

Control
IMS UE Portal
capablities


IM CN Subsystem
PS Core
/RAN
Content
Content
Source
Cache Server
Server&
IP Network
Live
Encoders
Fixed
Broadband
/ WLAN
Content
Access
…
Cache Server
IMS UE

Figure 4.1 Overview of IMS based Peer-to-Peer Content Distribution System
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3GPP TR 22.906 version 15.0.0 Release 15 8 ETSI TR 122 906 V15.0.0 (2019-07)
5 Use Cases
5.1 Content-on-Demand Service for Large numbers of Online
Users
5.1.1 Service Description

Figure 5.1 CoD for large numbers of online users
Jessica is an IMS subscriber of operator A, and she wants to view the popular movie "Transformer", but for some reason
she doesn't want to watch it in cinema. She notices from a pushed advertisement on her IMS client that IMS online movie
theatre can provide "Transformer" on demand with a discounted price. So she decides to watch it from online movie
theatre.
(1) Jessica starts her IMS P2P application
...