Communications protocol to transport satellite delivered signals over IP networks

This European Standard describes the SAT>IP communication protocol. It enables a SAT>IP server to forward satellite delivered signals to SAT>IP clients over IP networks. The typical use case would be the transport of television programs that were received from the satellite by the SAT>IP server to the SAT>IP client via the IP network. SAT>IP specifies a control protocol as well as the media transport (Figure 1). SAT>IP is not a device specification. The SAT>IP protocol distinguishes between SAT>IP clients and SAT>IP servers. SAT>IP Clients SAT>IP clients may reside in set-top boxes equipped with an IP interface or may be implemented as software applications running on programmable hardware such as Tablets, PCs, Smartphones, Connected Televisions. SAT>IP Servers SAT>IP servers may take various 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. Actual devices may be clients or servers or both depending on their feature set.

Kommmunikationsprotokoll zum Transport von Satellitensignalen über IP-Netze

Protocole de communication pour le transport des signaux transmis par satellite sur les réseaux IP

La présente Norme européenne décrit le protocole de communication SAT>IP qui permet à un serveur SAT>IP de transférer les signaux transmis par satellite aux clients SAT>IP sur les réseaux IP. Le scénario d'utilisation type est le transport de programmes TV par satellite entre un serveur SAT>IP et un client SAT>IP sur un réseau IP. SAT>IP spécifie un protocole de contrôle, ainsi que le transport multimédia (voir Figure 1). SAT>IP n'est pas une spécification de dispositif. Le protocole SAT>IP établit une distinction entre les clients SAT>IP et les serveurs SAT>IP. Clients SAT>IP Les clients SAT>IP peuvent résider dans des boîtiers décodeurs munis d'une interface IP ou peuvent être mis en oeuvre sous forme d'applications logicielles s'exécutant sur des matériels programmables tels que: tablettes, PC, smartphones, téléviseurs connectés. Serveurs SAT>IP Les serveurs SAT>IP peuvent prendre différentes formes: du simple adaptateur IP pour boîtier décodeur aux LNB (Low Noise Block) IP en passant par les dispositifs IP multicommutateurs domestiques et les grandes têtes de réseau MDU (Multi Dwelling Unit) desservant des collectivités ou des bâtiments entiers. Les dispositifs actuels peuvent être des clients et/ou des serveurs, selon leurs fonctionnalités.

Komunikacijski protokol za signale, poslane transportnemu satelitu po IP-omrežjih

Standard EN 50585 opisuje komunikacijski protokol SAT>IP. Strežniku SAT>IP omogoča, da signale, prejete prek satelita, pošlje odjemalcem SAT>IP prek IP-omrežja. Običajni primer uporabe je prenos televizijskih programov, ki jih strežnik SAT>IP prejme prek satelita, do odjemalca SAT>IP prek IP-omrežja. SAT>IP določa nadzorni protokol in prenos medijev. Protokol SAT>IP ne predstavlja specifikacije naprave. Protokol SAT>IP razlikuje med odjemalci SAT>IP in strežniki SAT>IP. Odjemalci SAT>IP Odjemalci SAT>IP lahko delujejo v komunikatorjih, opremljenih z vmesnikom IP, lahko pa so implementirani kot aplikacije programske opreme, ki se izvajajo na programirljivi strojni opremi, kot so tablični računalniki, osebni računalniki, pametni telefoni in povezani televizijski sprejemniki. Strežniki SAT>IP Strežniki SAT>IP so lahko različnih oblik: od velikih glavnih sprejemnih postaj MDU, ki strežejo celotnim stavbam ali skupnostim, do domačih IP-stikal za satelitsko distribucijo in preprostih IP-pretvornikov za komunikatorje ter IP-LNB-jev. Dejanske naprave so lahko glede na njihov nabor funkcij odjemalci, strežniki ali oboje.

General Information

Status
Published
Publication Date
22-May-2014
Current Stage
6060 - Document made available
Due Date
23-May-2014
Completion Date
23-May-2014

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SLOVENSKI STANDARD
SIST EN 50585:2014
01-oktober-2014

Komunikacijski protokol za signale, poslane transportnemu satelitu po IP-omrežjih

Communications protocol to transport satellite delivered signals over IP networks

Kommmunikationsprotokoll zum Transport von Satellitensignalen über IP-Netze

Protocole de communication pour le transport des signaux transmis par satellite sur les

réseaux IP
Ta slovenski standard je istoveten z: EN 50585:2014
ICS:
33.170 Televizijska in radijska Television and radio
difuzija broadcasting
SIST EN 50585:2014 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50585:2014
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SIST EN 50585:2014
EUROPEAN STANDARD EN 50585
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 33.170
English Version
Communications protocol to transport satellite delivered signals
over IP networks

Protocole de communication pour le transport des signaux Kommmunikationsprotokoll zum Transport von

transmis par satellite sur les réseaux IP Satellitensignalen über 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 giving 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 three 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 electrotechnical 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50585:2014 E
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Contents Page

Foreword ............................................................................................................................................................. 5

Introduction ........................................................................................................................................................ 6

1 Scope ..................................................................................................................................................... 7

2 Normative references ........................................................................................................................... 7

3 Terms, definitions and abbreviations ................................................................................................. 8

3.1 Terms and definitions .......................................................................................................................... 8

3.2 Abbreviations ........................................................................................................................................ 9

4 Basic description of SAT>IP system ................................................................................................ 10

4.1 SAT>IP 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 ................................................................................................................................................. 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

5.4.2 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 an 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 Management Protocol (IGMP) ................................................................................. 49

5.5.15 Status Code Definitions ..................................................................................................................... 51

5.5.16 RTCP Announcements ....................................................................................................................... 57

5.5.17 HTTP based requests ......................................................................................................................... 58

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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 Operation .......................................................................................... 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 (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 Configuration Settings .......................................................................................... 67

Annex C (informative) Example of SAT>IP 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) Support for DVB-T/-T2 (optional) .............................................................................. 74

D.1 General ................................................................................................................................................. 74

D.2 Implementation .................................................................................................................................... 74

Annex E (informative) SAT>IP 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 SAT>IP system ............................................................................................... 7

Figure 2 — Different types of live media servers ............................................................................................... 11

Figure 3 — SAT>IP protocol stack ..................................................................................................................... 12

Figure 4 — Comparison between SAT>IP 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 SAT>IP server carried in different concurrent

TCP connections ................................................................................................................................................ 27

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Figure 10 — Client with two RTSP sessions on the same SAT>IP 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 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 SAT>IP in the presence of multiple satellite positions ............................................. 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 SAT>IP multicast network diagram ........................................................................... 49

Figure 21 — General membership query message timing ................................................................................ 49

Figure 22 — Group specific query timing .......................................................................................................... 51

Figure 23 — Transport stream IP encapsulation ............................................................................................... 59

Figure 24 — Example of SAT>IP system using static server operation ............................................................ 60

Figure A.1 — IP Multiswitch application ............................................................................................................ 61

Figure A.2 — SAT>IP conversion inside an IP-LNB ......................................................................................... 61

Figure A.3 — Master-Slave application ............................................................................................................. 62

Figure A.4 — Universial 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

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Foreword

This document (EN 50585:2014) has been prepared by CLC/TC 209 "Cable networks for television signals,

sound signals and interactive services".
The following dates are fixed:
• latest date by which this document has to be (dop) 2015-03-24
implemented at national level by publication of
an identical national standard or by
endorsement
(dow) 2017-03-24
• latest date by which the national standards
conflicting with this document have to
be withdrawn

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.
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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 (1 IF range), into 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 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 SAT>IP .

1) SAT>IP is a short-term which covers the complete system for the transposition of SAT-IF 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.
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1 Scope

This European Standard describes the SAT>IP communication protocol. It enables a SAT>IP server to

forward satellite delivered signals to SAT>IP clients over IP networks. The typical use case would be the

transport of television programs that were received from the satellite by the SAT>IP server to the SAT>IP

client via the IP network. SAT>IP specifies a control protocol as well as the media transport (Figure 1).

Protocol
Server IP
Client
Live Television
Figure 1 — Basic principle of the SAT>IP system
SAT>IP is not a device specification.
The SAT>IP protocol distinguishes between SAT>IP clients and SAT>IP servers.
SAT>IP Clients

SAT>IP clients may reside in set-top boxes equipped with an IP interface or may be implemented as software

applications running on programmable hardware such as Tablets, PCs, Smartphones, Connected Televisions.

SAT>IP Servers

SAT>IP servers may take various 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.

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 for 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 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) (Internet 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))

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-v1-03 – Simple Service Discovery Protocol/1.0 (Internet Engineering Task Force (IETF))

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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 that 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
unique 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
SAT>IP

short-term which covers the complete system for the transposition of SAT-IF signals to IP-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
SAT>IP client

receive satellite delivered signals from SAT>IP server via IP networks; which may reside in set-top boxes

equipped with an IP interface or may be implemented as software applications running on programmable

hardware such as tablets, PCs, smartphones, connected televisions
3.1.7
SAT>IP server

transforms satellite signals, delivered in the SAT-IF format, to the IP format and transport it to SAT>IP clients

via IP networks; which may take various 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 format

3.1.9
unicast data transmission
data signal transmission from one server to only one client
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3.2 Abbreviations
CSV Comma Separated Values
DHCP Dynamic Host Configuration Protocol
DiSEqC
Digital Satellite Equipment Control
DLNA Digital Living Network Alliance
DSL Digital Subscriber Line
DVB Digital Video Broadcasting
DVB-S DVB for Satellite
DVB-S2 2 generation 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 Speed Packet Access
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 Maximum 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
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SDP Session Description Protocol
Service Information
SMATV Satellite Master Antenna Television
SOAP Simple Object Access Protocol
SPTS Single Program Transport Stream
SR Sender Report
SSDP Simple Service Discovery Protocol
STB
Set-Top-Box
TCP Transport Control Protocol
TS Transport Stream
TTL, ttl Time to live
UDP User Datagram Protocol
UPnP Universal Plug and Play
UPnP AV
UPnP Audio and Video
URI Uniform Resource Identifier
URL Uniform Resource Locator
urn universal resource name
UTF UCS Transformation Format
WLAN Wireless Local Area Network
XML
Extensible Markup Language
4 Basic description of SAT>IP system
4.1 SAT>IP concept

Unlike in today’s satellite distribution schemes, the SAT>IP architecture allows the reception of satellite

television programs also on devices which do not have a satellite tuner directly built-in. Satellite tuners and

demodulators are moved or “remoted” into SAT>IP server devices. Clients control SAT>IP servers via the

SAT>IP protocol. SAT>IP is a remote tuner control protocol which provides the possibility of remotely

controlling tuning devices.

This means that the reception of satellite delivered programming can be dealt with by clients purely in

software, provided a SAT>IP server is available on a network. Satellite programs become available on

devices which would never be capable of supporting satellite TV otherwise e.g. Tablets.

From the distribution point of view, satellite distribution becomes physical layer agnostic and satellite services

can be forwarded over all the latest types of wired or wireless technologies such as Powerline (PLC), Wireless

LANs, Optical Fibre Distribution, etc.
4.2 Network topology

The SAT>IP protocol is designed to suit different application scenarios. The same SAT>IP client can

communicate with various types of live media servers ranging from single satellite, si

...

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