1、 ETSI TS 102 685 V1.1.1 (2010-01)Technical Specification Digital Video Broadcasting (DVB);High-level Technical Requirements for QoSfor DVB Services in the Home NetworkETSI ETSI TS 102 685 V1.1.1 (2010-01)2Reference DTS/JTC-DVB-254 Keywords DVB, QoS ETSI 650 Route des Lucioles F-06921 Sophia Antipoli
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8、iation. ETSI ETSI TS 102 685 V1.1.1 (2010-01)3Contents Intellectual Property Rights 5g3Foreword . 5g3Introduction 5g31 Scope 7g32 References 8g32.1 Normative references . 8g32.2 Informative references 9g33 Definitions and abbreviations . 9g33.1 Definitions 9g33.2 Abbreviations . 10g34 Input QoS Rela
9、ted Requirements . 10g35 DVB Home Network Reference Model . 11g35.1 Introduction 11g35.2 Network Topology . 11g36 Generic Use Cases 12g36.1 Triggering Events . 12g36.2 Importance and Pre-emptability of Services. 12g36.3 Possible QoS management options 13g37 QoS functional reference Model 13g37.1 Rep
10、ositories 15g37.1.1 Status Repository 15g37.1.2 QoS Config and Policy Repositories 15g37.1.2.1 Static Config Repository . 15g37.1.2.2 Dynamic Config Repository 15g37.1.2.3 Policy Repository 16g37.2 Entities 16g37.2.1 Packet Processing Entity . 16g37.2.2 Monitor Entity 16g37.2.3 Flow Manager Entity 1
11、7g37.2.4 Policy Arbiter Entity . 19g37.2.5 Config Arbiter Entity 19g37.2.6 Applications 20g37.3 Interfaces 21g37.3.1 Access Network Interfaces . 21g37.3.1.1 Content Interface . 21g37.3.1.2 Service Statistics Interface 21g37.3.1.3 Diagnostic Data Interface 21g37.3.1.4 Remote Policy Interface 21g37.3.
12、1.5 Remote Config Interface . 21g37.3.2 Internal Interfaces . 21g37.3.2.1 Flow Request/Response Interface . 21g37.3.2.2 Flow Manager Policy Interface . 21g37.3.2.3 Flow Manager Static Config Interface 22g37.3.2.4 Flow Manager Dynamic Config Interface . 22g37.3.2.5 Flow Manager Status Interface . 22g
13、37.3.2.6 Application Status Interface 22g37.3.2.7 Local Policy Interface . 22g37.3.2.8 Local Config Interface . 22g38 QoS Functionality Levels . 22g39 Technical requirements 24g3ETSI ETSI TS 102 685 V1.1.1 (2010-01)49.1 Entities 24g39.1.1 Flow Manager Entity 24g39.1.2 Policy Arbiter Entity . 24g39.1
14、.3 Config arbiter Entity . 25g39.1.4 Packet Processing Entity . 25g39.1.5 Monitor Entity 25g39.1.6 Applications 26g39.2 Repositories 26g39.2.1 General Repository requirements . 26g39.2.2 Policy Repository 26g39.2.3 Static Config Repository . 27g39.2.4 Dynamic Config Repository . 27g39.2.5 Status Rep
15、ository 28g39.3 Interfaces 28g39.3.1 Network Interface . 28g39.3.1.1 Remote Management Service Interface 28g39.3.1.2 Service Statistics Interface 29g39.3.1.3 Diagnostic Data Interface 29g39.3.1.4 Remote Config Interface . 29g39.3.1.5 Remote Policy Interface 29g39.3.2 Internal Interfaces . 29g39.3.2.
16、1 Content Interface. 29g39.3.2.2 Flow Request and Response Interface. 30g39.3.2.3 Flow Manager Policy Interface . 30g39.3.2.4 Flow Manager Static Config Interface 30g39.3.2.5 Flow Manager Dynamic Config Interface . 30g39.3.2.6 Flow Manager Status Interface . 30g39.3.2.7 Applications Status Interface
17、 30g39.3.2.8 Local Policy Interface . 31g39.3.2.9 Local Config Interface 31g310 Mapping of QoS Components to QoS Levels 31g3Annex A (informative): QoS in other SDOs . 32g3Annex B (informative): Relationship with other DVB Specifications . 33g3B.1 DVB IPTV Handbook 33g3B.2 Broadband Content Guide 33g
18、3B.3 Remote Management and Firmware Update System . 33g3Annex C (normative): QoS related commercial requirements from DVB . 34g3C.1 Technology Requirements 34g3C.2 Content Formats . 34g3C.3 Network Topology . 34g3C.4 Third Party Management 35g3C.5 Application Resource Management . 35g3C.6 General Ho
19、me Network Functionality . 35g3C.7 Content Discovery and Selection . 35g3C.8 Content Presentation Control . 35g3C.9 Quality of Service mechanisms 36g3C.10 Contention Management 36g3C.11 User Specific Functionality 37g3History 38 ETSI ETSI TS 102 685 V1.1.1 (2010-01)5Intellectual Property Rights IPRs
20、 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 pot
21、entially 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:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried
22、 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 Joint Technical
23、Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE: The EBU/ETSI JTC Broadcast was established in 1990 to co-ordinate the drafting of standards in the speci
24、fic field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio and television receivers. The EBU is a professional association of broadcasting orga
25、nizations whose work includes the co-ordination of its members activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 G
26、RAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 The Digital Video Broadcasting Project (DVB) is an industry-led consortium of broadcasters, manufacturers, network operators, software developers, regulatory bodies, content owners and others committed to designing global
27、 standards for the delivery of digital television and data services. DVB fosters market driven solutions that meet the needs and economic circumstances of broadcast industry stakeholders and consumers. DVB standards cover all aspects of digital television from transmission through interfacing, condi
28、tional access and interactivity for digital video, audio and data. The consortium came together in 1993 to provide global standardisation, interoperability and future proof specifications. Introduction As IPTV systems are deployed, improvements in the technologies used for home networking result in
29、users expecting to be able to distribute their incoming TV services within the home environment, while that network is also carrying a range of other traffic. There might therefore be contention for resources and variations in the ability to transfer any specific stream of data reliably and consiste
30、ntly. The impact of timing variations and reduced resource availability frequently has the effect of reducing the presented quality of audiovisual media. We can express end users perspective of the Quality of Experience (QoE) as a measure of how well the combination of networks and services is satis
31、fying their requirements. QoE involves not only the transport behaviour but also the end-to-end connection and the applications that are currently running over that connection. For attracting and satisfying customers the service provider takes care of the Quality of Service (QoS) in order to keep th
32、e QoE as high as possible. QoS deals with the actual network operating conditions. The available tools are used to classify service components and media in terms of quality, to monitor the continuity of service levels, to evaluate aberrations, to control service and media flows as well as to provide
33、 information on quality related aspects to devices concerned. ETSI ETSI TS 102 685 V1.1.1 (2010-01)6Currently, the state of the art relies on classifying packets on a per-stream basis and prioritizing one stream type over another. This has the effect of ensuring that high-priority packets get throug
34、h at the expense of lower priority stream types (although this prioritization might not match the end-users view of relative importance of a particular service) and all streams of a particular type might be impacted if the aggregate network demand exceeds capacity. Ultimately, this could well mean t
35、hat the requisite QoS is not delivered in accordance with the requirements and contractual obligations of the service provider. The requirements collected in the present document focus on the quality aspects of home networks while taking into account the end-to-end delivery of a service from the acc
36、ess network through the home network gateway device up to the client device. Nevertheless, these requirements may also influence networks and devices outside the home network. Additionally, the services delivered in the home network may include both DVB and non-DVB services. As their simultaneous us
37、age may affect the performance of each other, the QoS mechanisms to be developed should also consider delivering an appropriate service quality to DVB services in the presence of non-DVB services, and to non DVB services in the presence of DVB services. For these reasons, in the present document we
38、establish a new framework for a higher order of QoS management within the home network and introduce some approaches for supporting that management in an attempt to move beyond current approaches to QoS. We have covered a number of technical requirements for such a system and are issuing the documen
39、t to solicit responses with technologies to meet the requirements so that a formal specification can be developed for a better Home Network QoS mechanism. This framework should enable home networks to develop where the QoS system can attempt to maintain the QoE within the HN. ETSI ETSI TS 102 685 V1
40、.1.1 (2010-01)71 Scope The present document presents the high-level QoS requirements for the Home Network (HN) for the carriage of DVB services. DVB believes that, without further action, home networks will not provide the level of QoS required to deliver IPTV services to users reliably, and therefo
41、re, there is a need for developing a QoS mechanism that will improve the reliability of delivery of (streamed) content through the HN as much as possible. In the present document an agreed set of high-level technical requirements for QoS is defined that can be used as input to the relevant technical
42、 groups and organizations for the development of such QoS mechanisms. Although this work has been done within DVB, primarily with the DVB Home Network in mind, it is applicable to any IP-based home network. The DVB QoS requirements will address especially the situation where the home network is bit
43、rate constrained and may be operating close to its maximum capacity, meaning that the addition of further loading can adversely affect all the services flowing through the HN. The ability to manage the services within the HN is essential to give service providers confidence that subscription and pre
44、mium content will be correctly delivered to the user through the HN. Furthermore, since DVB expects that more advanced QoS capabilities will be required for the reliable carriage of future DVB services across home networks, it is important to determine the QoS requirements now. However, the solution
45、 developed must allow a progressive evolution with backward compatibility with current QoS methods and practices and forward compatibility to the full QoS specification derived from the requirements of the present document. DVB assumes that other standards bodies such as DLNA, HGI and DSLF will prov
46、ide the QoS solution. Therefore, DVB will contribute the present document towards DLNA and other Standards Development Organizations (SDOs) and consortia in order to contribute to the process leading to a satisfactory QoS solution for the carriage of DVB service to and within the home. In principle
47、the DVB QoS requirements will only take into account the HN i.e. QoS requirements for the Access Network (AN) are out of scope, because there is a diverse variety of AN types and each AN or service provider has its own (proprietary) implementation. Furthermore, the AN is currently considered as bein
48、g professionally managed, while it is likely that this may not be true for the HN. In this sense the QoS requirements for the HN are considered to be more important than for the AN. Therefore, the focus of the present document will be on the development of technical QoS requirements for the HN but w
49、here necessary the AN will be taken into account, to achieve a seamless transition for DVB content services from the AN into the HN. The foundation for the high-level QoS requirements is formed by: A number of use cases identified for defining the QoS requirements. The DVB commercial requirements for the HN. The work done in the DVB HN work on reference model. In an effort to maintain alignment as far as possible with DLNA the work of the DLNA CSPR QoS “Tiger Team“ has been reviewed. It is recognized that the QoS management described in the present document attemp
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