ETSI TS 102 721-1 V1.2.1 (2013-08)

ETSI TS 102 721-1 V1.2.1 (2013-08)






Technical Specification
Satellite Earth Stations and Systems (SES);
Air Interface for S-band Mobile Interactive Multimedia (S-MIM);
Part 1: General System Architecture and Configurations

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2 ETSI TS 102 721-1 V1.2.1 (2013-08)



Reference
RTS/SES-00333
Keywords
architecture, configuration, MSS, satellite
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3 ETSI TS 102 721-1 V1.2.1 (2013-08)
Contents
Intellectual Property Rights . 5
Foreword . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 8
4 System Overview . 9
4.1 General . 9
4.2 User Services of the S-MIM System . 10
4.3 Mapping of Service Segments to Radio Interfaces . 11
4.4 Terminal Classes . 12
5 S-MIM Network Architecture . 13
5.1 S-MIM Segments . 13
5.2 S-MIM Interfaces . 14
6 Network Elements . 15
6.1 The User Terminals . 15
6.1.1 Terminals with Access to SS1 and/or SS2 . 15
6.1.1.1 The Type C Terminal . 15
6.1.2 Terminals with Access to SS3 . 16
6.2 The Network Control Centre and the Satellite Hub . 21
6.2.1 The Satellite Hub . 21
6.2.2 The Network Control Centre . 25
6.3 The Complementary Ground Components . 26
6.3.1 The FWD CGC . 26
6.3.2 The RTN CGC . 27
7 Protocol Architecture . 31
7.1 Forward Link . 31
7.1.1 Forward Link Reference Protocol Stack . 31
7.1.2 Forward Link Protocol Architectures . 31
7.1.2.1 Satellite Link Only . 32
7.1.2.2 Satellite and/or FWD CGC . 32
7.2 Return Link . 33
7.2.1 Asynchronous Return Link Reference Protocol Stack . 33
7.2.2 Asynchronous Return Link Protocol Architectures . 34
7.2.2.1 Satellite Link Only . 34
7.2.2.2 Satellite and/or RTN CGC . 34
7.2.3 Synchronous Return Link Reference Protocol Stack . 35
7.2.4 Synchronous Return Link Protocol Architecture . 35
Annex A (normative): Mapping of Services into Forward Link Physical Layer Channels . 37
Annex B (informative): Network Architecture Configurations . 38
Annex C (informative): The Service Enabling Platform. 40
C.1 Server Side Middleware for SS1 and SS2 . 40
C.2 Server Side Middleware for SS3 . 41
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4 ETSI TS 102 721-1 V1.2.1 (2013-08)
Annex D (informative): Management Plane . 43
Annex E (informative): Bibliography . 45
History . 46

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5 ETSI TS 102 721-1 V1.2.1 (2013-08)
Intellectual Property Rights
IPRs 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 potentially 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://ipr.etsi.org).
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 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 ETSI Technical Committee Satellite Earth Stations and
Systems (SES).
The present document is part 1 of a multi-part deliverable covering the Air Interface for S-band Mobile Interactive
Multimedia (S-MIM), as identified below:
Part 1: "General System Architecture and Configurations";
Part 2: "Forward Link Subsystem Requirements";
Part 3: "Physical Layer Specification, Return Link Asynchronous Access";
Part 4: "Physical Layer Specification, Return Link Synchronous Access";
Part 5: "Protocol Specifications, Link Layer";
Part 6: "Protocol Specifications, System Signalling".
Introduction
The S-MIM system specified herein is designed to provide:
• Interactive mobile broadcast services.
• Messaging services for handhelds and vehicular terminals, capable of serving millions of terminals due to a
novel optimized air-interface in the return link.
• Real-time emergency services such as voice and file transfer, mainly addressing institutional users
on-the-move such as fire brigades, civil protection, etc.
Inside the S-band, the 2 GHz MSS band is of particular interest for interactive multimedia, since it allows two-way
transmission. Typically, the DVB-SH standard [i.8] is applied for broadcast transmission of user services; ESDR [i.6] or
DVB-NGH [i.12] standards are other alternatives. Essential requirements under the R&TTE directive are covered by the
harmonized standard EN 302 574 [i.3], [i.4] and [i.5].
The present document supersedes the previous version of the document and is recommended for new implementations.
In case DVB-SH is used in the forward link, the changes with respect to the previous version are backward compatible.
The technology applied has been developed in the framework of the ESA funded project "DENISE" (ESTEC/Contract
Number 22439/09/NL/US).
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6 ETSI TS 102 721-1 V1.2.1 (2013-08)
1 Scope
The present document specifies the S-MIM (S-band Mobile Interactive Multimedia) system in which a standardized
S-band satellite mobile broadcast system is complemented by the addition of a return channel.
The present document is part 1 of the multi-part deliverable and defines the general S-band Mobile Interactive
Multimedia (S-MIM) system architecture and configurations.
The other parts are listed in the foreword.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
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 necessary for the application of the present document.
[1] ETSI TS 102 721-2: "Satellite Earth Stations and Systems; Air Interface for S-band Mobile
Interactive Multimedia (S-MIM); Part 2: Forward Link Subsystem Requirements".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 102 584: "Digital Video Broadcasting (DVB); DVB-SH Implementation Guidelines".
[i.2] IEEE Journal on Selected Areas in Communications: "Bandlimited Quasi-Synchronous CDMA: A
Novel Satellite Access Technique for Mobile and Personal Communications Systems".
R. De Gaudenzi, C. Elia, R. Viola, 1992.
[i.3] ETSI EN 302 574-1: "Satellite Earth Stations and Systems (SES); Harmonized standard for
satellite earth stations for MSS operating in the 1 980 MHz to 2 010 MHz (earth-to-space) and
2 170 MHz to 2 200 MHz (space-to-earth) frequency bands; Part 1: Complementary Ground
Component (CGC) for wideband systems: Harmonized EN covering the essential requirements of
article 3.2 of the R&TTE Directive".
[i.4] ETSI EN 302 574-2: "Satellite Earth Stations and Systems (SES); Harmonized standard for
satellite earth stations for MSS operating in the 1 980 MHz to 2 010 MHz (earth-to-space) and
2 170 MHz to 2 200 MHz (space-to-earth) frequency bands; Part 2: User Equipment (UE) for
wideband systems: Harmonized EN covering the essential requirements of article 3.2 of the
R&TTE Directive".
[i.5] ETSI EN 302 574-3: "Satellite Earth Stations and Systems (SES); Harmonized standard for
satellite earth stations for MSS operating in the 1 980 MHz to 2 010 MHz (earth-to-space) and
2 170 MHz to 2 200 MHz (space-to-earth) frequency bands; Part 3: User Equipment (UE) for
narrowband systems: Harmonized EN covering the essential requirements of article 3.2 of the
R&TTE Directive".
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7 ETSI TS 102 721-1 V1.2.1 (2013-08)
[i.6] ETSI EN 302 550 (all parts and sub-parts): "Satellite Earth Stations and Systems (SES); Satellite
Digital Radio (SDR) Systems".
[i.7] ETSI TS 102 824 (V1.1.1): "Digital Video Broadcasting (DVB); Remote Management and
Firmware Update System for DVB IPTV Services (Phase 2)".
[i.8] ETSI TS 102 585: "Digital Video Broadcasting (DVB); System Specifications for Satellite
services to Handheld devices (SH) below 3 GHz".
[i.9] ETSI TS 102 721-3: "Satellite Earth Stations and Systems; Air Interface for S-band Mobile
Interactive Multimedia (S-MIM); Part 3: Physical Layer Specification, Return Link Asynchronous
Access".
[i.10] ETSI TS 102 721-4: "Satellite Earth Stations and Systems; Air Interface for S-band Mobile
Interactive Multimedia (S-MIM); Part 4: Physical Layer Specification, Return Link Synchronous
Access".
[i.11] ETSI TS 102 721-5: "Satellite Earth Stations and Systems; Air Interface for S-band Mobile
Interactive Multimedia (S-MIM); Part 5: Protocol Specifications, Link Layer".
[i.12] DVB BlueBook A160: "Next Generation broadcasting system to Handheld, physical layer
specification (DVB-NGH)".
[i.13] ETSI TS 102 721-6: "Satellite Earth Stations and Systems; Radio interface for S-band Mobile
Interactive Multimedia (S-MIM); Part 6: "Satellite Earth Stations and Systems; Air Interface for
S-band Mobile Interactive Multimedia (S-MIM); Part 6: Protocol Specifications, System
Signalling".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
2 GHz MSS band: 1 980 MHz to 2 010 MHz (earth-to-space) and 2 170 MHz to 2 200 MHz (space-to-earth) frequency
bands
NOTE: These paired bands are assigned to MSS.
architecture: abstract representation of a communications system
NOTE: Three complementary types of architecture are defined:
Functional Architecture: the discrete functional elements of the system and the associated logical
interfaces.
Network Architecture: the discrete physical (network) elements of the system and the associated
physical interfaces.
Protocol Architecture: the protocol stacks involved in the operation of the system and the
associated peering relationships.
collector: terrestrial components (Complementary Ground Component) that "collect" return link transmissions from
terminals and forward them towards the ground segment
control plane: plane that has a layered structure and performs the access control and connection control functions; it
deals with the signalling necessary to access to services, set up, supervise and release calls and connections
flow (of IP packets): traffic associated with a given connection-oriented, or connectionless, packet sequence having the
same 5-tuple of source address, destination address, Source Port, Destination Port and Protocol type
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8 ETSI TS 102 721-1 V1.2.1 (2013-08)
management plane: plane that provides two types of functions, namely Layer Management and plane management
functions:
• plane management functions: performs management functions related to a system as a whole and provides
co-ordination between all the planes. Plane management has no layered structure
• layer Management functions: performs management functions relating to resources and parameters residing
in its protocol entities
repeater: terrestrial components (Complementary Ground Component) that (mainly) repeat the satellite signal in the
forward link
S-band: equivalent to 2 GHz MSS band
user plane: plane that has a layered structure and provides user information transfer, along with associated controls
(e.g. flow control, recovery from errors, etc.)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
2G/3G Second/Third generation mobile services,
AAA Authentication, Authorization, Accounting
AuC Authentication Centre
CAC Call Admission Control
CDMA Code Division Multiple Access
CDR Call Detail Records
CGC Complementary Ground Component
CWMP Customer premises equipment WAN Management Protocol
DAMA Dynamic Assignment Multiple Access
DVB-H Digital Video Broadcasting, services to Handhelds
DVB-SH Digital Video Broadcasting, Satellites services to Handhelds
EIRP Equivalent Isotropic Radiated Power
ESDR ETSI Satellite Digital Radio
ESG Electronic Service Guide
ETSI European Telecommunication Standards Institute
FLUTE File Delivery Over Unidirectional Transport
FTP File Transfer Protocol
FUS Firmware Update System
FWD Forward (link)
GEO Geostationary Earth Orbit
GHz Giga Hertz
GNSS Global Navigation Satellite System
GPS Global Positioning System
GSM Global System for Mobile Communications
GW GateWay
HLR Home Location Register
HTTP Hypertext Transfer Protocol
IC Interference Cancellation/Interleaver Cycle
ID Identifier
IETF Internet Engineering Task Force
IKE Internet Key Exchange
IMSI International Mobile Subscriber Identity
IP Internet Protocol
IPSec IP Security
IPv4 Internet Protocol version 4
IPv6 Internet Protocol version 6
IS Interface Satellite
ISDN Integrated Services Digital Network
ITSP Internet Telephony Service Provider
IU Interleaver Unit/Interface User
LAN Local Area Network
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9 ETSI TS 102 721-1 V1.2.1 (2013-08)
MMS Multimedia Message Service
MPEG Moving Pictures Experts Group
MPEG-TS MPEG Transport Stream
MSS Mobile Satellite Services
NCC Network Control Centre/Non-Compressed Channel
NRT Non-Real-time
OBU On-Board Unit
PEP Performance Enhancement Proxy
PHY Physical Layer
PID Program Identifier
PSI/SI Program Specific Information/Service Information
PSTN Public Switched telephone Network
QoS Quality of Service
QS-CDMA Quasi Synchronous CDMA
R&TTE Radio and Telecommunications Terminal Equipment
RF Radio Frequency
RFC Request for Comment
RMS Remote Management System
RT Real-time
RTCP Real-Time Control Protocol
RTN Return (link)
RTP Real-time Protocol
SDR Satellite Digital Radio
SEL Service Enabling Layer
SEP Service Enabling Platform
SFN Single Frequency Network
SIP Session Initiation Protocol
SLR SEP Location Register
S-MIM S-band Mobile Interactive Multimedia
SMP S-MIM Messaging Protocol
SMS Short Message Service
SNMP Simple Network Management Protocol
SOAP Simple Object Access Protocol
SS Subsystem
SS1 Service Segment 1
SS2 Service Segment 2
SS3 Service Segment 3
SSA Spread Spectrum Aloha
SSMx Server Side Middleware for Service Segment x
TCP Transmission Control Protocol
UDP User Datagram Protocol
UMTS Universal Mobile Telecommunications System
USIM Universal Subscriber Identity Module
VLR Visitor Location Register
VoIP Voice over IP
WAN Wide Area Network
4 System Overview
4.1 General
An integrated satellite/terrestrial mobile system is described in the present document that provides interactive
broadcast/multicast, data acquisition and two-way real-time services to subscribers. The S-band payload of a GEO
satellite is assumed to provide communication links to users; however, non-GEO satellites are also compatible with this
integrated system provided that Doppler pre-compensation countermeasures are put in place. Figure 4.1 shows an
example of the system configuration.
NOTE: Satellites with payloads that are "transparent" to communication protocols (rather than "regenerative") are
assumed throughout the present document.
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10 ETSI TS 102 721-1 V1.2.1 (2013-08)
On the forward link, a broadcast radio access interface shall be used according to the requirements specified in
TS 102 721-2 [1].
On the return link, the radio interface is based on two non-exclusive options depending on the service required:
1) Asynchronous access using Spread Spectrum Aloha (SSA) random access.
2) Synchronous access using Quasi-synchronous Code Division Multiple Access (QS-CDMA) [i.2].
A number of terminals with different capabilities are foreseen to enable users to access different sets of services. Access
to services may be complemented by terrestrial Complementary Ground Components (CGCs).
Ku-band feeder links are shown as examples of feeder links to the satellite S-band payload and the CGCs. In general the
feeder links to the S-band satellite payload and the CGCs are independent, i.e. the same feeder link can be used, but also
different feeder links can be used, even in different frequency bands. Furthermore, the CGC feeder link can also be
implemented by terrestrial networks.
Although not shown in Figure 4.1, interconnection with 2G/3G and IP networks is also foreseen to extend the access of
the user devices to services.

Figure 4.1: S-MIM System Elements
4.2 User Services of the S-MIM System
The S-MIM system provides three sets of user services: Service Segments 1, 2 & 3 (SS1, SS2, SS3), which can be
provided concurrently and in different combinations.
Each Service Segment is defined by the inclusion of a number of services and service components each with similarities
in their use of FWD and RTN links and in their QoS. Table 4.1 indicates the list of services that can be provided
through S-MIM and their classification in terms of Service Segments.
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11 ETSI TS 102 721-1 V1.2.1 (2013-08)
Table 4.1: S-MIM Service Segments
Service Segment 1 - Broadcast and Interactive Services
Service Service Components
One-way broadcast/multicast services Streaming
Data distribution
Interactive broadcast/multicast services Interactive streaming PayPerView
Televoting
Home-shopping
Interactive data distribution PayPerUse
Content repair
Service Segment 2 - Data Acquisition Services
Service Service Components
Messaging services Vehicle telemetric
Environmental Monitoring
Messaging Services in Combination with Anti-theft Services
GNSS Applications
Traffic Monitoring
Automatic Toll Payment
Distress Beacon
Interactive Distress Beacon
SMS -
Service Segment 3 - Real-Time (Emergency) Services
Service Service Components
Public safety and emergency services eCall
Two-way IP connection
Broadcast of Common Interest Messages
Broadband for Professional Use DSL-like connectivity

4.3 Mapping of Service Segments to Radio Interfaces
Given the different performance requirements of the services between SSs, the S-MIM system is designed so that in
each SS the transport of a service is mapped into a suitable specific radio interface. The mapping of services into radio
interfaces in the FWD and RTN links is shown in Figure 4.2, where two types of radio interface are shown in each case.
Accordingly, different configurations of the S-MIM system in terms of its FWD and RTN links will support one or
several of the Service Segments indicated in clause 4.2.
FWD link capacity is shared between two profiles; a real-time (RT) profile and a non-real-time (NRT) profile. Flexible
assignment between RT and NRT will allow most of the services to be offered when the RT profile is not available,
although with (reduced) QoS guarantees of the NRT profile.
An overview of preferred and mandatory mappings of services into Forward Link Physical Layer Channels is shown in
Annex A.
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12 ETSI TS 102 721-1 V1.2.1 (2013-08)
FWD LINK
Non-Real Time Physical Channel Real Time Physical Channel
nrt-PCH rt-PCH
SS1 SS2 SS3
Short Two-way
Streaming Datacast Signalling Messaging Signalling Signalling
Messages Real Time
SSA QS-CDMA
RTN LINKS

Figure 4.2: Mapping of Service Segments into available radio interfaces
4.4 Terminal Classes
The S-MIM terminal classes related to Service Segments, etc. are defined in Table 4.2. Further details, including the
differences between Bx terminals, are available in Table 6.1.
Table 4.2: Overview of S-MIM Terminal Classes
Terminal Class Name Service segments Mobility
A Handheld 1, 2 Mobile
B0 1, 2
B1 2
Vehicular Mobile
B2 1, 2
B3 1, 2, 3 (see note)

C Specific 1, 2, 3 (see note) High speed
D Emergency 3 Nomadic
E Fixed 3 Fixed
F Sensor 2 Fixed
NOTE: Access to eCall service only, excluding all other SS3 services.

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13 ETSI TS 102 721-1 V1.2.1 (2013-08)
5 S-MIM Network Architecture
The S-MIM Network Architecture is a structured representation of the general S-MIM system introduced in clause 4.1,
and is described in terms of its overall segments and interfaces.
The S-MIM Network Architecture as shown in Figure 5.1 is intended to be a modular system; some elements are
mandatory for all configurations of the network, while others are optional and can be deployed incrementally to
increase the performance and the service scope of the system, as described in Annex B. This figure also shows the
boundaries of the S-MIM system including internal and external interfaces.
S-MIM System
Complementary
User Segment Satellite Segment Ground Segment Service Segment
Ground Segment
[IU ]
1
Terminal A
[IU2]
[IS7]
[IU ]
3
Terminal B0
HUB
Terminal B1
SAT
Service
[I6]
Terminal B2 SAT
Enabling
[I ]
6
Platform
[IU2]
Terminal B3
NCC
[IU ]
4
RTN CGC
Terminal C
[IS ]
5 [IS ]
8
[IU ]
3
FWD CGC
Terminal F
[I ]
6
[I ]
6
Terminal B3
Terminal C
[I6]
2G/3G/IP
Terminal D
Terrestrial Network
[I ]
6
Terminal E
[I ]
6
[I6]

Figure 5.1: S-MIM Network Architecture - Network elements, interfaces and external segments
The Segments and the Interfaces shown above are described below.
Configurations of the above network architecture adapted to specific Service Segments are described in Annex B.
5.1 S-MIM Segments
The S-MIM system is composed of segments as follows:
1) User Segment: comprises all types of S-MIM user terminals.
2
...