1、 ETSI TS 102 611 V1.1.1 (2007-10)Technical Specification Digital Video Broadcasting (DVB);IP Datacast over DVB-H: Implementation Guidelinesfor MobilityEuropean Broadcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI TS 102 611 V1.1.1 (2007-10) 2 Reference DTS/JTC-DVB-216 Keywords broad
2、casting, DVB-H, IP, mobility, roaming, TV ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Indiv
3、idual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Documen
4、t Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the cur
5、rent status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reprodu
6、ced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2007. European Broadcasting Union 2007. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registe
7、red for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 102 611 V1.1.1 (2007-10) 3
8、 Contents Intellectual Property Rights4 Foreword.4 Introduction 4 1 Scope 5 2 References 5 2.1 Normative references .5 2.2 Informative references6 3 Definitions and abbreviations.6 3.1 Definitions6 3.2 Abbreviations .7 4 Background 7 4.1 Overview 7 4.2 Network ID and original network ID .8 4.3 Trans
9、port Stream (TS) ID.8 4.4 Rules of uniqueness8 4.5 Basic handover concept8 4.6 TPS mobility support9 4.7 Data loss avoidance 9 5 Handover use cases 9 5.1 Overview of handover use cases 9 5.2 Detection of alternative service reception parameters10 5.2.1 Use Case 1: Change of cell or sub-cell ID 10 5.
10、2.2 Use Case 2: Change of cell ID and network ID11 5.2.3 Use Case 3: Change of cell ID and Transport Stream ID .13 5.2.4 Use Case 4: Change of cell ID and network ID and Transport Stream ID .14 5.2.5 Use Case 5: Change of Original Network.16 6 Handover implementation guidelines.17 6.1 General proced
11、ure 17 6.2 Initialization .18 6.3 Determine list of candidate signals.19 6.4 Determine handover case .19 6.5 Monitor handover conditions .19 6.5.1 Parameters that may be used in monitoring and evaluating20 6.5.2 Monitor existing signal quality .22 6.5.3 Evaluate alternative signal quality23 6.6 Hand
12、over execution25 6.6.1 Handover based on TPS and NIT .26 6.6.2 Handover based on INT, TPS and NIT.27 Annex A (informative): Bibliography.29 History 30 ETSI ETSI TS 102 611 V1.1.1 (2007-10) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been de
13、clared 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“, whi
14、ch 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 out by ETSI. No guarantee can be given as to the existence of other IPRs no
15、t 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 Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Eu
16、ropen 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 specific field of broadcasting and related fields. Since 1995 the JTC Broadcast b
17、ecame 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 organizations whose work includes the co-ordination of its members activities in
18、 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 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24
19、81 Introduction IP Datacast over DVB-H is an end-to-end broadcast system for delivery of any types of digital content and services using IP-based mechanisms optimized for devices with limitations on computational resources and battery. An inherent part of the IP Datacast system is that it comprises
20、a unidirectional DVB broadcast path that may be combined with a bi-directional mobile/cellular interactivity path. IP Datacast is thus a platform that can be used for enabling the convergence of services from broadcast/media and telecommunications domains (e.g. mobile/cellular). ETSI ETSI TS 102 611
21、 V1.1.1 (2007-10) 5 1 Scope The present document presents guidelines on how to develop terminals and network infrastructure equipment to allow seamless handover within one IP platform, in order to continue IP Datacast service consumption. These guidelines rely on the DVB-H 1, TR 102 377 14, and IP D
22、atacast phase 1 2 specifications. Roaming between IP platforms will be addressed in a subsequent version of the present document. 2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequ
23、ent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future changes of the referenced document for the purposes of the referring document; - for informativ
24、e references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably, the primary source of t
25、he referenced document should be cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the method of access to the referenced document and the full network address, with the same
26、punctuation and use of upper case and lower case letters. 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 indispensable for the application of the
27、present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. 1 ETSI EN 302 304: “Digital Video Broadcasting (DVB); Transmission System for Handheld Terminals (DVB-H)“. 2 ETSI TS
28、102 468: “Digital Video Broadcasting (DVB); IP Datacast over DVB-H: Set of Specifications for Phase 1“. 3 ETSI TS 102 472: “Digital Video Broadcasting (DVB); IP Datacast over DVB-H: Content Delivery Protocols “. 4 ETSI TS 102 471: “Digital Video Broadcasting (DVB); IP Datacast over DVB-H: Electronic
29、 Service Guide (ESG)“. 5 Jani Vre, Matti Puputti: “Soft handover in terrestrial broadcast networks“, Proceedings of MDM2004. 6 ETSI TS 102 470: “Digital Video Broadcasting (DVB); IP Datacast over DVB-H: PSI/SI“. 7 Void. ETSI ETSI TS 102 611 V1.1.1 (2007-10) 6 8 Void. 9 Void. 10 Void. 11 Void. 12 ISO
30、/IEC 13818-1: “Generic coding of moving pictures and associated audio information“. 13 IEC 62002-1 “Mobile and portable DVB-T/H radio access - Part 1: Interface specification“. 2.2 Informative references 14 ETSI TR 102 377: “Digital Video Broadcasting (DVB); DVB-H Implementation Guidelines“. 15 ETSI
31、 TR 101 211: “Digital Video Broadcasting (DVB); Guidelines on implementation and usage of Service Information (SI)“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: cell: geographical area that is covered with DVB-T
32、 signals delivering one or more particular transport streams throughout the area by means of one or more transmitters NOTE: The cell may in addition contain repeaters. Two neighbouring cells may be intersecting, or fully overlapping. The cell_id that is used to uniquely identify a cell is unique wit
33、hin each original_network_id. For hand-over purposes it is more convenient if the transport streams associated with the cell cover exactly the same area, or only one transport stream per cell is used. DVB Network: collection of MPEG-2 Transport Streams, each carried in a multiplex, and transmitted o
34、n a single delivery system NOTE: DVB network is identified by network_id. IP flow: flow of IP datagrams each sharing the same IP source and destination address NOTE: An IP flow is identified within an IP platform by its source and destination addresses. IP flows on different IP platforms may have th
35、e same source/destination addresses, but are considered different IP flows. IP flows may be delivered over one or more IP streams. IP platform: set of IP flows managed by an organization NOTE: The IP platform represents a harmonized IP address space that has no address collisions. An IP platform may
36、 span several Transport Streams within one or more DVB networks. Several IP platforms may co-exist in the same Transport Stream. IP platform is identified by platform_id. IP stream: physical mapping of an IP Flow to transport_stream_id, original_network_id, service_id, component_tag, and IP source/d
37、estination addresses NOTE: An IP stream is delivered on an MPE section stream. Multiplex: stream of all the digital data carrying one or more services within a single physical channel (characterized by parameters like carrier frequency and modulation modes) Sub-Cell: geographical area that is part o
38、f the cells coverage area and that is covered with DVB-T signals by means of a transposer NOTE: In conjunction with the cell_id the cell_id_extension is used to uniquely identify a subcell. ETSI ETSI TS 102 611 V1.1.1 (2007-10) 7 Transport Stream (TS): stream of transport_packets, as defined in ISO/
39、IEC 13818-1 12 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: CBMS Convergence of Broadcast and Mobile Services DVB Digital Video Broadcasting DVB-H DVB-Handheld 1 ESG Electronic Service Guide 4 IPDC IP DataCast NW NetWorkTS Transport Stream 4 Backgrou
40、nd The focus of the present clause is to provide a brief introduction on PSI/SI tables and descriptors used in IPDC in DVB-H Systems as well as to describe basic handover concepts. 4.1 Overview A DVB network is uniquely identified by a network_id. A DVB network consists of one or more Transport Stre
41、ams (TSs), each being transmitted by one or more DVB signals. All emitting sites identified by cell_ids of a network do not need to transmit all TSs of the network. Information about a DVB network is available within the NIT sub_table (identified by network_id). The NIT lists all TSs and DVB signals
42、 available within the DVB network. The NIT is carried within each DVB network. DVB network 1ID: network_idPSI/SI: NITMultiplex 1ID: transport_stream_id +original_network_idPSI/SI: PATDVB service 1ID: service_idPSI/SI: PMTComponent 1ID: component_tag, PIDDVB networksTransport StreamsDVB servicesEleme
43、ntary StreamsMultiplex 2ID: transport_stream_id +original_network_idPSI/SI: PATMultiplex 3ID: transport_stream_id +original_network_idPSI/SI: PATDVB service 2ID: service_idPSI/SI: PMTDVB service 3ID: service_idPSI/SI: PMTComponent 2ID: component_tag, PIDComponent 3ID: component_tag, PIDFigure 1: Hie
44、rarchy of data streams in DVB-H (1) An IP stream is a single data stream delivering an IP flow. An IP flow is a flow of IP datagrams, each sharing the same IP source and destination addresses, that represent the data content of a stream. An IP stream represents an instantiation of such an IP flow to
45、 transport_stream_id, original_network_id, network_id, service_id, component_tag, and IP_source / destination addresses. An IP flow belongs to exactly one IP platform. Note that an IP stream may be announced by multiple INT sub_tables, possibly making it part of multiple IP platforms. ETSI ETSI TS 1
46、02 611 V1.1.1 (2007-10) 8 IP platform 1ID: platform_idPSI/SI: INTIP flow 1ID: IP addressIP stream 1ID: transport_stream_id +original_network_id +PIDIP platformsIP flowIP streamsIP flow 2ID: IP addressIP flow 3ID: IP addressIP stream 2ID: transport_stream_id +original_network_id +PIDIP stream 3ID: tr
47、ansport_stream_id +original_network_id +PIDFigure 2: Hierarchy of data streams in DVB-H (2) 4.2 Network ID and original network ID In DVB, the original_network_id is defined as the network_id of the network where the TS originated. For terrestrial DVB the concept of an original network, with an orig
48、inal_network_id, could be interpreted as a sort of abstract hypothetical network feeding all real networks (in the sense of network_id) in e.g. a country. The original_network_ids are typically allocated by DVB on a per-country basis. For each country, a range of network_ids is allocated by DVB, whi
49、ch are all different from the original_network_id. It may happen that the original_network_id is the same as the network_id of the actual network. 4.3 Transport Stream (TS) ID From the point of view of the DVB-SI specification a network is simply a collection of MPEG-2 Transport Stream (TS) multiplexes transmitted on a single delivery system, with no mentioning of requirements for emission in all cells of the network. From the point of view of 2 there are therefore no particular rules whether a TS needs to be broadca
