ETSI TS 102 744-2-1 V1.1.1 (2015-10)

Satellite Earth Stations and Systems (SES); Family SL Satellite Radio Interface (Release 1); Part 2: Physical Layer Specifications; Sub-part 1: Physical Layer Interface

DTS/SES-00299-2-1

General Information

• Status: Published
• Publication Date: 25-Oct-2015
• Technical Committee: SES SCN - Satellite Communications and Navigation
• Current Stage: 12 - Completion
• Due Date: 25-Sep-2015
• Completion Date: 26-Oct-2015

Standards Content (Sample)

ETSI TS 102 744-2-1 V1.1.1 (2015-10)






TECHNICAL SPECIFICATION
Satellite Earth Stations and Systems (SES);
Family SL Satellite Radio Interface (Release 1);
Part 2: Physical Layer Specifications;
Sub-part 1: Physical Layer Interface

�

---------------------- Page: 1 ----------------------
2 ETSI TS 102 744-2-1 V1.1.1 (2015-10)



Reference
DTS/SES-00299-2-1
Keywords
3GPP, GPRS, GSM, GSO, interface, MSS, radio,
satellite, TDM, TDMA, UMTS
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (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 current 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:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2015.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI TS 102 744-2-1 V1.1.1 (2015-10)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Symbols and abbreviations . 7
3.1 Symbols . 7
3.2 Abbreviations . 7
4 Overview of physical layer . 7
5 Forward bearers . 8
5.1 Introduction . 8
5.1.1 Forward bearer types . 8
5.1.2 L-Band Forward Frequency Range . 9
5.2 Modulation . 10
5.2.1 Symbol rate . 10
5.2.2 Modulation schemes . 11
5.2.2.1 16-QAM (X/X16) bearers . 11
5.2.2.2 32-QAM (X32) bearers . 11
5.2.2.3 64-QAM (X64) bearers . 13
5.2.2.4 QPSK (Q/X4) bearers . 15
5.2.2.5 Dynamic Modulation . 16
5.2.3 Channel filtering . 16
5.3 Bearer types and frame formats . 20
5.3.1 Frame numbering . 20
5.3.2 Forward bearer parameters . 20
5.3.3 Forward channel frame formats . 21
5.3.4 Unique words . 22
5.3.4.0 General . 22
5.3.4.1 QPSK (Q) bearers . 22
5.3.4.2 X (F80T1X, F80T4.5X) Bearers . 23
5.3.4.3 X4/16 (FR80T2.5X4/16-5B, FR80T5X4/16-9B) Bearers . 23
5.3.4.4 X16 (FR80T2.5X16-5B, FR80T5X16-9B) Bearers . 24
5.3.4.5 X32 (FR80T2.5X32-6B, FR80T5X32-11B) Bearers . 25
5.3.4.6 X64 (FR80T2.5X64-7B, FR80T5X64-13B) Bearers . 26
5.3.5 Pilot symbols . 26
5.3.6 Empty block data . 27
5.3.7 Scrambling . 27
5.3.8 Coding . 27
5.3.8.0 General . 27
5.3.8.1 Turbo coding . 27
5.3.8.2 SRCC encoder . 28
5.3.8.3 S-Interleaver . 29
5.3.8.4 Puncturing, Channel Interleaving and Symbol Mapping . 29
5.3.8.5 80ms Outer Interleaver . 29
5.4 PDU formats . 30
6 Return bearers . 31
6.1 Introduction . 31
6.1.1 Return bearer types . 31
6.1.2 L-Band Return Frequency Range . 33
6.2 Modulation . 34
ETSI

---------------------- Page: 3 ----------------------
4 ETSI TS 102 744-2-1 V1.1.1 (2015-10)
6.2.1 Symbol rate . 34
6.2.2 Modulation schemes . 34
6.2.2.1 16-QAM (X) Bearers . 34
6.2.2.2 π/4 QPSK Bearers . 34
6.2.2.3 FR80T2.5/T5 Bearers . 35
6.2.3 Channel filtering . 35
6.3 Bearer types and frame formats . 36
6.3.1 Frame numbering . 36
6.3.2 Return bearer parameters . 37
6.3.3 Return channel frame format . 37
6.3.3.0 General . 37
6.3.3.1 5 ms Slot and Burst Definition . 37
6.3.3.2 20 ms Slot and Burst Definition . 38
6.3.3.3 80 ms Slot and Burst Definition . 39
6.3.3.3.0 General . 39
6.3.3.3.1 R80T0.5Q-1B . 39
6.3.3.3.2 R80T1Q-1B . 43
6.3.3.3.3 Preamble Generation . 47
6.3.3.3.4 CRC - R80 Bearers . 48
6.3.4 Distributed Unique Word Burst Format. 49
6.3.4.1 Distributed Unique Word Burst Format - R80 Bearers . 49
6.3.4.2 Distributed Unique Word Burst Format - R5/R20 bearers . 51
6.3.5 Burst Preamble (R5/R20 bursts) . 52
6.3.6 Unique Words . 52
6.3.6.0 General . 52
6.3.6.1 QAM (X) Bearers . 52
6.3.6.2 π/4 QPSK (Q) Bearers . 54
6.3.7 Scrambling . 55
6.3.8 Coding . 55
6.3.8.0 General . 55
6.3.8.1 Turbo Coding for QAM (X/X16/Q16/X32/X64) Bearers . 55
6.3.8.2 Turbo Coding for R5 and R20 π/4 QPSK (Q) Bearers . 55
6.3.8.3 Turbo coding for π/4 QPSK (Q) - R80 burst . 56
6.3.8.4 SRCC Encoder . 57
6.3.8.5 S-Interleaver . 57
6.3.8.6 Puncturing, Channel Interleaving and Symbol Mapping . 57
6.4 PDU Formats . 57
6.5 Return Channel Timing . 58
6.5.1 Timing Reference . 58
6.5.2 Return Schedules . 59
6.5.3 Initial Random Access Bearers . 60
Annex A (informative): Bearer Type and Subtype Identifiers . 61
A.1 Bearer type naming conventions . 61
A.2 Bearer subtype identifiers . 62
Annex B (normative): Bearer parameters . 63
B.1 Forward link bearer parameters . 63
B.2 Return link bearer parameters . 63
Annex C (normative): Bearer tables . 64
C.1 Turbo-Code Interleaver tables . 64
C.2 Puncturing, Channel Interleaving and Symbol Mapping tables . 64
History . 65

ETSI

---------------------- Page: 4 ----------------------
5 ETSI TS 102 744-2-1 V1.1.1 (2015-10)
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 2, sub-part 1 of a multi-part deliverable. Full details of the entire series can be found in
ETSI TS 102 744-1-1 [i.4].
The forward and return bearer tables referred to in clauses B.1 and B.2 of the present document are contained in a
separate attachment with filename ts_1027440201_AnnexB2_Bearer_Parameters_v010101p0.zip, contained in archive
ts_1027440201v010101p0.zip which accompanies the present document.
The turbo-code interleaver tables referred to in clause C.1 of the present document and the puncturing, channel
interleaving and symbol mapping tables referred to in clause C.2 of the present document are contained in separate
attachments with filenames ts_1027440201_AnnexC1_v010101p0.zip and ts_1027440201_AnnexC2_v010101p0.zip,
contained in archive ts_1027440201v010101p0.zip which accompanies the present document.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
This multi-part deliverable (Release 1) defines a satellite radio interface that provides UMTS services to users of mobile
terminals via geostationary (GEO) satellites in the frequency range 1 518,000 MHz to 1 559,000 MHz (downlink) and
1 626,500 MHz to 1 660,500 MHz and 1 668,000 MHz to 1 675,000 MHz (uplink).
ETSI

---------------------- Page: 5 ----------------------
6 ETSI TS 102 744-2-1 V1.1.1 (2015-10)
1 Scope
The present document defines the Physical Layer of the Family SL Satellite Radio Interface between the Radio Network
Subsystem (RNS) and the User Equipment (UE).
2 References
2.1 Normative 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
reference 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.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 102 744-1-4: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 1: General Specifications; Sub-part 4: Applicable External
Specifications, Symbols and Abbreviations".
[2] ETSI TS 102 744-2-2: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 2: Physical Layer Specifications; Sub-part 2: Radio Transmission and
Reception".
[3] ETSI TS 102 744-3-1: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 1: Bearer
Control Layer Interface".
[4] ETSI TS 102 744-3-2: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 3: Control Plane and User Plane Specifications; Sub-part 2: Bearer
Control Layer Operation".
2.2 Informative 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
reference document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
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] "Decoder-Assisted Frame Synchronization for Turbo Coded Systems", M. Howlader, Y. Wu,
nd
B. Woerner, 2 International Symposium on Turbo Codes and Related Topics, Brest,
September 2000.
[i.2] "Performance of Turbo-Codes with Relative Prime and Golden Interleaving Strategies"',
S. Crozier, J. Lodge, P. Guinand, A. Hunt, Sixth International Mobile Satellite Conference,
Ottawa, June 1999.
[i.3] CCITT Red Book, Recommendation X.25.
[i.4] ETSI TS 102 744-1-1: "Satellite Earth Stations and Systems (SES); Family SL Satellite Radio
Interface (Release 1); Part 1: General Specifications; Sub-part 1: Services and Architectures".
ETSI

---------------------- Page: 6 ----------------------
7 ETSI TS 102 744-2-1 V1.1.1 (2015-10)
3 Symbols and abbreviations
3.1 Symbols
For the purposes of the present document, the symbols given in ETSI TS 102 744-1-4 [1], clause 3 apply.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in ETSI TS 102 744-1-4 [1], clause 3 apply.
4 Overview of physical layer
The physical layer is the layer which transfers an information bitstream over the satellite link, and includes the
following:
At a transmitter:
• scrambling, encoding and interleaving blocks of data and conversion to a serial symbol stream;
• modulation and filtering of a carrier at a specified frequency using the symbol stream; and
• transmission of the modulated and filtered carrier at the appropriate time and power level.
At a receiver:
• reception of a modulated carrier and measurement of carrier parameters;
• filtering and demodulation of the carrier into a received symbol stream;
• decoding, de-interleaving and de-scrambling of the symbol stream into a received block of data;
• channel equalization (Aeronautical Class UE Only).
Transmission between the satellite and mobile users is in spectrum allocated to mobile satellite services (see
clauses 5.1.2 and 6.1.2). The particular physical layer characteristics may be different in the two directions of
transmission (to and from UEs).
The physical layer operates with multiple physical bearer configurations, in both the forward and return direction,
offering a choice of different modulation schemes as well as symbol and coding rates. The choice of the optimum
bearer configuration is determined by the Bearer Control Layer based on various parameters, such as UE capabilities,
satellite beam selection, required bitrate, etc.
Forward and Return Bearers are configurable as follows:
• bandwidth efficient 64-QAM, 32-QAM, 16-QAM (forward and return) and power efficient QPSK (forward)
and π/4 QPSK (return) modulation schemes;
• a choice of symbol rates in the forward direction: 8,4; 33,6; 84,0; 151,2 and 168,0 kBd;
• a choice of symbol rates in the return direction: 16,8; 33,6; 67,2; 84,0; 151,2 and 168,0 kBd; and
• variable coding rate allowing nominal 1 dB steps of change in required Carrier to Noise density ratio (C/No).
To minimize the constraints on system design further, different unique words are used to allow the receiver to decode
transmissions without a-priori knowledge of the coding rate that the transmitter is applying to a specific burst or frame.
There is, in addition, a set of bearers for which the modulation rate is variable on an FEC-block basis between QPSK
and 16-QAM. These bearers are defined as X4/16 rather than QPSK to highlight the distinction between these dynamic
modulation bearers and QPSK or 16-QAM only bearers.
ETSI

---------------------- Page: 7 ----------------------
8 ETSI TS 102 744-2-1 V1.1.1 (2015-10)
The concept of "UE Class" is used to make distinctions between User Equipment with different RF characteristics or
different behaviour (at higher layers). The details of the different UE Classes are defined in ETSI TS 102 744-2-2 [2].
The present document defines all the possible bearers types. Not all of these bearers are applicable for each UE Class:
the exact mapping between each UE Class and supported bearer types is described in ETSI TS 102 744-2-2 [2].
5 Forward bearers
5.1 Introduction
5.1.1 Forward bearer types
The forward bearers are capable of carrying nominal data rates in the range between 4,5 kbit/s and 858,0 kbit/s and are
based upon the continuous transmission of Time-Division-Multiplexed (TDM) carriers. The forward bearer is
transmitted with a constant mean power level.
This clause describes the physical attributes of the forward bearer types, and the general UE and Radio Network System
(RNS) requirements when operating with these bearer types.
Individual Forward Bearer Types are summarized in Table 5.1.
Table 5.1: Overview of Forward Bearer Types
Bearer Type Frame Duration Symbol Rate Modulation Channel FEC Blocks
Identifier (see note) (ms) (kBd) bandwidth (kHz) per Frame
F80T0.25Q-1B 80 0,25 x 33,6 QPSK 10,50 1
F80T1Q-1B 80 1,0 x 33,6 QPSK 42,00 1
F80T1Q-4B 80 1,0 x 33,6 QPSK 42,00 4
F80T1X-4B 80 1,0 x 33,6 16-QAM 42,00 4
FR80T2.5X4/16-5B 80 2,5 x 33,6 4-QAM/16-QAM 94,92 5
FR80T2.5X16-5B 80 2,5 x 33,6 16-QAM 94,92 5
FR80T2.5X32-6B 80 2,5 x 33,6 32-QAM 94,92 6
FR80T2.5X64-7B 80 2,5 x 33,6 64-QAM 94,92 7
F80T4.5X-8B 80 4,5 x 33,6 16-QAM 189,00 8
FR80T5X4/16-9B 80 5,0 x 33,6 4-QAM/16-QAM 189,84 9
FR80T5X16-9B 80 5,0 x 33,6 16-QAM 189,84 9
FR80T5X32-11B 80 5,0 x 33,6 32-QAM 189,84 11
FR80T5X64-13B 80 5,0 x 33,6 64-QAM 189,84 13
NOTE: The bearer type identifier notation used in the present document is defined in Annex A.

A block diagram of the forward bearer transmitter is shown in Figure 5.1. The functional blocks at the transmit end of
each channel are as follows:
a) scrambler;
b) turbo FEC encoder;
c) transmit synchronizer; and
d) QPSK and 16/32/64 QAM modulat
...