1、BSI Standards PublicationBS EN 50585:2014Communications protocol totransport satellite deliveredsignals over IP networksBS EN 50585:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50585:2014.The UK participation in its preparation was entrusted to Technical
2、Committee EPL/100/4, Cable distribution equipment and systems.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The
3、 British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 82994 9ICS 33.170Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June
4、2014.Amendments issued since publicationDate Text affectedBS EN 50585:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50585 May 2014 ICS 33.170 English Version Communications protocol to transport satellite delivered signals over IP networks Protocole de communication pour le transport des
5、signaux transmis par satellite sur les rseaux IP Kommmunikationsprotokoll zum Transport von Satellitensignalen ber IP-Netze This European Standard was approved by CENELEC on 2014-03-24. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for g
6、iving this European Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in thre
7、e official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national elect
8、rotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Rom
9、ania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brusse
10、ls 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50585:2014 EBS EN 50585:2014EN 50585:2014 - 2 - Contents Page Foreword . 5 Introduction 6 1 Scope . 7 2 Normative references . 7 3 Terms, definitions and abbreviations . 8 3.1
11、Terms and definitions 8 3.2 Abbreviations 9 4 Basic description of SATIP system 10 4.1 SATIP concept 10 4.2 Network topology . 10 4.3 Client functionality . 11 4.4 Specification compliance . 11 4.5 Usage scenarios . 11 5 Protocol specification 11 5.1 General . 11 5.2 UPnP addressing 13 5.2.1 General
12、 . 13 5.2.2 DHCP addressing . 13 5.2.3 Auto-IP addressing . 13 5.3 UPnP Discovery 13 5.3.1 General . 13 5.3.2 Simple service description protocol SSDP 13 5.3.3 Server Advertisements . 14 5.3.4 DEVICE ID negotiation . 16 5.3.5 Client Search Requests 22 5.4 UPnP Description . 23 5.4.1 General . 23 5.4
13、.2 XML Device Description . 23 5.5 RTSP Control 26 5.5.1 General . 26 5.5.2 Real time streaming protocol RTSP . 26 5.5.3 Setting up a new session . 28 5.5.4 Starting the playout of a media stream (PLAY) . 33 5.5.5 Maintaining a session (OPTIONS) . 35 5.5.6 Modifying a media stream 36 5.5.7 Joining a
14、n existing stream 37 5.5.8 Listing available media streams (DESCRIBE) . 37 5.5.9 Closing the session and stopping the playout (TEARDOWN) . 40 5.5.10 RTSP Methods 41 5.5.11 Uniform Resource Identifyer (URI) 44 5.5.12 Query Syntax . 44 5.5.13 Example of RTSP sequence diagram . 48 5.5.14 Internet Group
15、 Management Protocol (IGMP) . 49 5.5.15 Status Code Definitions . 51 5.5.16 RTCP Announcements . 57 5.5.17 HTTP based requests . 58 BS EN 50585:2014- 3 - EN 50585:2014 5.6 Media Transport . 58 5.6.1 RTP Transport 58 5.6.2 HTTP Streaming . 59 5.7 Media Formats . 59 6 Dynamic versus Static Server Oper
16、ation 59 6.1 Dynamic Operation (default) 59 6.2 Static Operation . 59 6.3 Mixed Operation 60 Annex A (informative) Usage scenarios . 61 A.1 IP Adapter / IP Multiswitch . 61 A.2 IP LNB . 61 A.3 Master STB . 61 A.4 Universal Service Gateway . 62 A.5 IP based SMATV / Multi-Dwelling Units . 62 Annex B (
17、informative) Client Implementation Guidelines . 64 B.1 General . 64 B.2 RTSP Clients 64 B.2.1 Definition 64 B.2.2 Client Setup and Configuration Settings 64 B.2.3 Service Discovery 65 B.2.4 Channel change implementation . 66 B.3 IGMPv3 Clients 67 B.3.1 Definition 67 B.3.2 Client Setup and Configurat
18、ion Settings 67 Annex C (informative) Example of SATIP Message Exchanges 70 C.1 Example 1: Unicast Session Setup (no front-end selected) plus three additional channel changes 70 C.2 Example 2: Multicast Session Setup with front-end selection and destination address/port 72 Annex D (informative) Supp
19、ort for DVB-T/-T2 (optional) 74 D.1 General . 74 D.2 Implementation 74 Annex E (informative) SATIP trademark and certification 76 E.1 Trademark 76 E.2 Artwork . 76 E.3 Certification 76 Bibliography 77 Figures Figure 1 Basic principle of the SATIP system . 7 Figure 2 Different types of live media ser
20、vers . 11 Figure 3 SATIP protocol stack . 12 Figure 4 Comparison between SATIP and DLNA . 12 Figure 5 NOTIFY message timing . 14 Figure 6 DEVICE ID allocation timing 17 Figure 8 RTSP Control Example . 26 Figure 9 Client with two RTSP sessions on the same SATIP server carried in different concurrent
21、TCP connections 27 BS EN 50585:2014EN 50585:2014 - 4 - Figure 10 Client with two RTSP sessions on the same SATIP server carried in one TCP connection at a given time . 27 Figure 11 Stream owner setting up a session and defining the transport 31 Figure 12 Non-stream owner joining an already existing
22、multicast stream and defining the transport . 31 Figure 13 Non-stream owner joining an already existing unicast stream and defining the transport 31 Figure 14 Server Stream Output State Machine . 35 Figure 15 RTSP State Machine 42 Figure 16 Operation of SATIP in the presence of multiple satellite po
23、sitions . 46 Figure 17 Server internal source and frontend selection matrix . 46 Figure 18 Media stream object definition 47 Figure 19 Example of a sequence diagram for RTSP operation 48 Figure 20 Example of SATIP multicast network diagram . 49 Figure 21 General membership query message timing 49 Fi
24、gure 22 Group specific query timing 51 Figure 23 Transport stream IP encapsulation . 59 Figure 24 Example of SATIP system using static server operation 60 Figure A.1 IP Multiswitch application 61 Figure A.2 SATIP conversion inside an IP-LNB . 61 Figure A.3 Master-Slave application . 62 Figure A.4 Un
25、iversial Service Gateway application 62 Figure A.5 IP based SMATV application . 63 Figure B.1 Example of auto-configuration set-up . 66 Figure E.1 76 BS EN 50585:2014- 5 - EN 50585:2014 Foreword This document (EN 50585:2014) has been prepared by CLC/TC 209 “Cable networks for television signals, sou
26、nd signals and interactive services“. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-03-24 latest date by which the national standards conflicting with this docume
27、nt have to be withdrawn (dow) 2017-03-24 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN / CENELEC / CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. BS EN 50585:2014EN 50585:2014 -
28、6 - Introduction This standard describes a new communication protocol for the distribution of satellite signals onto IP networks. It effectively “translates” TV signals, received from satellites in the DVB-S and DVB-S2 formats and supplied in the first intermediate frequency range (1stIF range), int
29、o signals for use on internet-based devices in the IP world. This technology enables the reception of satellite TV on devices that do not have an integrated satellite receiver. Satellite signals can thus be transported via every IP infrastructure with or without cable. This way, the entire satellite
30、 household can be provided with TV and sound radio programmes on tablets, PCs, laptops, smart phones, connected TVs, game consoles and media players. This technology concept is commonly referred to as SATIP 1). 1) SATIP is a short-term which covers the complete system for the transposition of SAT-IF
31、 signals to IP-based signals. This term is used in a widespread manner for marking software and hardware components used in such systems. More details are given in informative Annex E. BS EN 50585:2014- 7 - EN 50585:2014 1 Scope This European Standard describes the SATIP communication protocol. It e
32、nables a SATIP server to forward satellite delivered signals to SATIP clients over IP networks. The typical use case would be the transport of television programs that were received from the satellite by the SATIP server to the SATIP client via the IP network. SATIP specifies a control protocol as w
33、ell as the media transport (Figure 1). Server IP ClientIFLive TelevisionProtocolFigure 1 null Basic principle of the SATIP system SATIP is not a device specification. The SATIP protocol distinguishes between SATIP clients and SATIP servers. SATIP Clients SATIP clients may reside in set-top boxes equ
34、ipped with an IP interface or may be implemented as software applications running on programmable hardware such as Tablets, PCs, Smartphones, Connected Televisions. SATIP Servers SATIP servers may take various forms ranging from large MDU headends servicing whole buildings or communities to in-home
35、IP multiswitches to simple IP adapters for a set-top box to, ultimately, IP LNBs. Actual devices may be clients or servers or both depending on their feature set. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable fo
36、r its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 29341-1-1, Information technology UPnP Device Architecture Part 1.1: UPnP Device Architecture Version 1.1 ETSI TS
37、 101 154 V1.9.1, Digital Video Broadcasting (DVB); Specification for the use of Video and Audio Coding in Broadcasting Applications based on the MPEG-2 Transport Stream RFC 2113 IP Router Alert Option (Internet Engineering Task Force (IETF) RFC 2131 DHCP (Dynamic Host Configuration Protocol) (Intern
38、et Engineering Task Force (IETF) RFC 2250 RTP Payload Format for MPEG1/MPEG2 Video (Internet Engineering Task Force (IETF) RFC 2279 UTF-8, a transformation format of ISO 10646 (Internet Engineering Task Force (IETF) RFC 2326 Real Time Streaming Protocol (RTSP) (Internet Engineering Task Force (IETF)
39、 RFC 3376 Internet Group Management Protocol, Version 3 (Internet Engineering Task Force (IETF) RFC 3550 RTP: A Transport Protocol for Real-Time Applications (Internet Engineering Task Force (IETF) RFC 4566 SDP: Session Description Protocol (Internet Engineering Task Force (IETF) draft-cai-ssdp-v1-0
40、3 Simple Service Discovery Protocol/1.0 (Internet Engineering Task Force (IETF) BS EN 50585:2014EN 50585:2014 - 8 - 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 dynamic server operation server tha
41、t is dynamically connected to a tuner when a TV program is requested in the IP format by a user 3.1.2 live television delivered from signal source to end-user equipment without significant delay but with the possibility of (several) changes of transmission format 3.1.3 multicast data transmission un
42、ique transmission of data signals from one server to more than one client 3.1.4 multiswitch server server that is connected to a number of tuners in order to deliver channels requested by customers 3.1.5 SATIP short-term which covers the complete system for the transposition of SAT-IF signals to IP-
43、based signals Note 1 to entry: This term is used in a widespread manner for marking software and hardware components used in such systems. 3.1.6 SATIP client receive satellite delivered signals from SATIP server via IP networks; which may reside in set-top boxes equipped with an IP interface or may
44、be implemented as software applications running on programmable hardware such as tablets, PCs, smartphones, connected televisions 3.1.7 SATIP server transforms satellite signals, delivered in the SAT-IF format, to the IP format and transport it to SATIP clients via IP networks; which may take variou
45、s forms ranging from large MDU headends servicing whole buildings or communities to in-home IP multiswitches to simple IP adapters for a set-top box to, ultimately, IP LNBs 3.1.8 static server operation server that is always connected to a number of tuners to provide the wanted TV programs in the IP
46、 format 3.1.9 unicast data transmission data signal transmission from one server to only one client BS EN 50585:2014- 9 - EN 50585:2014 3.2 Abbreviations CSV Comma Separated Values DHCP Dynamic Host Configuration Protocol DiSEqC Digital Satellite Equipment Control DLNA Digital Living Network Allianc
47、e DSL Digital Subscriber Line DVB Digital Video Broadcasting DVB-S DVB for Satellite DVB-S2 2ndgeneration DVB for satellite DVR Digital Video Recorder FEC Forward Error Correction GENA General Event Notification Architecture HTML HyperText Markup Language HTTP Hyper Text Transfer Protocol HSPA High
48、Speed Packet Access IF Intermediate Frequency IGMP Internet Group Management Protocol IP Internet Protocol LAN Local Area Network LNB Low Noise Block MDU Multi Dwelling Unit MIME Multipurpose Internet Mail Extensions MPEG Moving Picture Experts Group MPTS Multiple Program Transport Stream MTU Maximu
49、m Transmission Unit MUDP Multicast UDP NAS Network Attached Storage PID Packet Identifier PLC Power Line Communication PoE Power over Ethernet PSK Phase Shift Keying PVR Personal Video Recorder QPSK Quaternary Phase Shift Keying RFC Request For Comments RTP Real-time Transport Protocol RTCP Real-time Transport Control Protocol RTSP Real Time Streaming Protocol SDES Source Description BS EN 50585:2014EN 50585:2014 - 10 - SDP Session Description Protocol SI Service Information SMATV Satelli
