1、 International Telecommunication Union ITU-T Y.2253TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2014) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Next Generation Networks Service aspects: Interoperability of services and networks in NGN
2、Capabilities of multi-connection to support streaming services Recommendation ITU-T Y.2253 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middlewa
3、re Y.200Y.299 Network aspects Y.300Y.399 Interfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1
4、199 Architecture, access, network capabilities and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over
5、NGN Y.1900Y.1999 NEXT GENERATION NETWORKS Frameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250Y.2
6、299Enhancements to NGN Y.2300Y.2399 Network management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETWORKS Y.3000Y.3499 CLOUD COMPU
7、TING Y.3500Y.3999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Y.2253 (01/2014) i Recommendation ITU-T Y.2253 Capabilities of multi-connection to support streaming services Summary The objective of this Recommendation is to describe the requirements for the netw
8、ork transport capabilities and the service layer to support streaming services over multi-connection. It also defines the characteristics of the streaming service over multi-connection. History Edition Recommendation Approval Study Group Unique ID*1.0 ITU-T Y.2253 2014-01-13 13 11.1002/1000/12073-en
9、 Keywords Multi-connection architecture, NGN, streaming service. _ *To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Y.2253 (01/
10、2014) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible fo
11、r studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T stud
12、y groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis
13、with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory pr
14、ovisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use o
15、f such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no po
16、sition concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, pro
17、tected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2014 All rights reserved. No part
18、 of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Y.2253 (01/2014) iii Table of Contents Page 1 Scope 1 2 References. 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation . 3 4 Abbreviations an
19、d acronyms 3 5 Conventions 4 6 Service definition and general requirements 5 6.1 Service definition 5 6.2 General requirements 5 6.3 QoS/QoE requirements . 6 6.4 Use case of MC-Streaming . 6 7 Network and MUE requirements 7 7.1 Network transport capability requirements 7 7.2 MUE requirements . 7 8 A
20、rchitecture 8 8.1 General architecture 8 8.2 High level description of functions 9 8.3 Functional entities 9 8.4 Reference points . 12 9 Information flows . 13 9.1 Authorization and streaming establishment . 13 9.2 Streaming decomposition . 14 9.3 Streaming composition . 15 9.4 Streaming transfer 17
21、 10 Security considerations . 19 10.1 Subscriber security . 19 10.2 Service security 20 10.3 Network security 21 10.4 Terminal device security 23 11 Charging . 24 11.1 Charging mechanisms 24 11.2 Charging policies 25 iv Rec. ITU-T Y.2253 (01/2014) Page Appendix I Scenarios of streaming services over
22、 multi-connection . 27 I.1 Video services 27 I.2 Video conference services 27 I.3 Real-time monitor services . 28 Bibliography. 29 Rec. ITU-T Y.2253 (01/2014) 1 Recommendation ITU-T Y.2253 Capabilities of multi-connection to support streaming services 1 Scope This Recommendation describes the requir
23、ements, architecture, information flows and other aspects such as security and charging for streaming services over multi-connection. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommen
24、dation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other reference
25、s listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.722 Recommendation ITU-T G.722 (2012), 7 kHz audio-coding within 64
26、kbit/s. ITU-T H.264 Recommendation ITU-T H.264 (2014), Advanced video coding for generic audiovisual services. ITU-T X.200 Recommendation ITU-T X.200 (1994) | ISO/IEC 7498-1:1994, Information technology Open Systems Interconnection Basic Reference Model: The basic model. ITU-T X.800 Recommendation I
27、TU-T X.800 (1991), Security architecture for Open System Interconnection for CCITT applications. ITU-T Y.1901 Recommendation ITU-T Y.1901 (2009), Requirements for the support of IPTV services. ITU-T Y.2233 Recommendation ITU-T Y.2233 (2010), Requirements and framework allowing accounting and chargin
28、g capabilities in NGN. ITU-T Y.2251 Recommendation ITU-T Y.2251 (2011), Multi-connection requirements. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 access control ITU-T X.800: The prevention of unauthorized use of a resource, includi
29、ng the prevention of use of a resource in an unauthorized manner. 3.1.2 authorization ITU-T X.800: The grant of rights, which includes the granting of access based on access rights. 3.1.3 availability ITU-T X.800: The property of being accessible and useable upon demand by an authorized entity. 3.1.
30、4 confidentiality ITU-T X.800: The property that information is not made available or disclosed to unauthorized individuals, entities, or processes. 2 Rec. ITU-T Y.2253 (01/2014) 3.1.5 connection ITU-T X.200, clause 5.3.3.2.1: A connection is an association established for the transfer of data betwe
31、en two or more peer-(N)-entities. This association binds the peer-(N)-entities together with the (N-1)-entities in the next lower layer. 3.1.6 content protection ITU-T Y.1901: Ensuring that an end-user can only use the content they have already acquired in accordance with the rights that they have b
32、een granted by the rights holder. 3.1.7 data integrity ITU-T X.800: The property that data has not been altered or destroyed in an unauthorized manner. 3.1.8 data origin authentication ITU-T X.800: The corroboration that the source of data received is as claimed. 3.1.9 denial of service ITU-T X.800:
33、 The prevention of authorized access to resources or the delaying of time-critical operations. 3.1.10 Internet Protocol Television (IPTV) ITU-T Y.1901: Multimedia services such as television/video/audio/text/graphics/data delivered over IP-based networks managed to support the required level of QoS/
34、QoE, security, interactivity and reliability. 3.1.11 mobility b-ITU-T Q.1706: The ability for the user or other mobile entities to communicate and access services irrespective of changes of the location or technical environment. 3.1.12 multi-connection ITU-T Y.2251: The functionality which provides
35、capability to the user equipment (UE) and network to maintain more than one access network connection simultaneously. NOTE 1 All connections are coordinated to provide service to higher layer entities. NOTE 2 In a multi-connection communications at least one UE is required to be a multi-connection U
36、E. 3.1.13 next generation network (NGN) b-ITU-T Y.2001: A packet-based network able to provide telecommunication services and able to make use of multiple broadband, QoS-enabled transport technologies and in which service-related functions are independent from underlying transport related technologi
37、es. It enables unfettered access for users to networks and to competing service providers and/or services of their choice. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users. 3.1.14 offline charging ITU-T Y.2233: Charging mechanism where chargi
38、ng information does not affect, in real-time, the service rendered. 3.1.15 online charging ITU-T Y.2233: Charging mechanism where charging information can affect, in real-time, the service rendered and therefore a direct interaction of the charging mechanism with resource/session/service control is
39、required. 3.1.16 service protection ITU-T Y.1901: Ensuring that an end-user can only acquire a service, and, by extension, the content contained therein, that he or she is entitled to receive. 3.1.17 terminal device ITU-T Y.1901: An end-user device which typically presents and/or processes the conte
40、nt, such as a personal computer, a computer peripheral, a mobile device, a TV set, a monitor, a VoIP terminal or an audiovisual media player. 3.1.18 terminal device protection ITU-T Y.1901: Ensuring that a terminal device employed by an end-user in the reception of a service can reliably and securel
41、y use content while enforcing the rights of use granted for that content, and while physically and electronically protecting the integrity of the terminal device, and the confidentiality of the content and critical security parameters not otherwise protected by encryption or watermarking. 3.1.19 thr
42、eat ITU-T X.800: A potential violation of security. Rec. ITU-T Y.2253 (01/2014) 3 3.2 Terms defined in this Recommendation This Recommendation defines the following term: 3.2.1 MC-Streaming (streaming service over multi-connection): Streaming service over multi-connection provides multimedia feature
43、s such as video/audio/text/graphics/data in real time supported by the required level of QoS/QoE, security, interactivity and reliability. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AC-FE Application Control Functional Entity ACK Acknowledgement A
44、N Access Network ANI Application Network Interface AP Access Point BS Base Station CDN Content Delivery Network CDR Charging Data Record CS Circuit Switched DDoS Distributed Denial Of Service DES Data Encryption Standard DNS Domain Name System DoS Denial of Service DRM Digital Rights Management IDS
45、Intrusion Detection System IP Internet Protocol IPSec Internet Protocol Security IPTV Internet Protocol Television MAS-F Multi-connection Application Support Function MC-FE Multi-connection Coordination Functional Entity MMF Multi-connection Media Function MPC-FE Multi-connection Policy Control Func
46、tional Entity MR-FE Multi-connection Registration Functional Entity MSAC-FE MC-Streaming Application Control Functional Entity MSCC-FE MC-Streaming Content Control Functional Entity MSCD-FE MC-Streaming Content Delivery Functional Entity MSUP-FE MC-Streaming Application-User Profile Functional Entit
47、y MUE Multi-connection User Equipment MUP-FE Multi-connection User Profile Functional Entity NGN Next Generation Network 4 Rec. ITU-T Y.2253 (01/2014) OAM this is decided according to the existing underlying network, operation requirements, etc. 8.3.4 MC-Streaming content delivery functional entity
48、(MSCD-FE) MSCD-FE is responsible for delivering streaming content from MSCC-FE to the subscriber. In this Recommendation, the multi-connection architecture is the preferred model to provide content delivery. However if the multi-connection architecture is not supported, existing distribution mechani
49、sms such as multicast, P2P and CDN can also be employed. In other words, the content is recommended to be delivered through different connections simultaneously. Based on the underlying distribution mechanisms, MSCD-FE may cooperate with related entities to fulfil content delivery. For example, MSCD-FE may cooperate with MAS-F in the multi-connection environment. In addition, MSCD-FE is recommended to coordinate the transmission of content over differen
