ETSI TS 101 376-5-7 V3.4.1 (2015-10)

GEO-Mobile Radio Interface Specifications (Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 7: Radio Subsystem Synchronization; GMR-1 3G 45.010

RTS/SES-00374-5-7

General Information

• Status: Published
• Publication Date: 12-Oct-2015
• Technical Committee: SES SCN - Satellite Communications and Navigation
• Current Stage: 12 - Completion
• Due Date: 13-Oct-2015
• Completion Date: 13-Oct-2015
• Mandate: M/496

Standards Content (Sample)

ETSI TS 101 376-5-7 V3.4.1 (2015-10)






TECHNICAL SPECIFICATION
GEO-Mobile Radio Interface Specifications (Release 3);
Third Generation Satellite Packet Radio Service;
Part 5: Radio interface physical layer specifications;
Sub-part 7: Radio Subsystem Synchronization;
GMR-1 3G 45.010

---------------------- Page: 1 ----------------------
GMR-1 3G 45.010 2 ETSI TS 101 376-5-7 V3.4.1 (2015-10)



Reference
RTS/SES-00374-5-7
Keywords
3G, GMPRS, GMR, GPRS, GSM, GSO,
interface, MES, mobile, MSS, radio, satellite,
S-PCN, synchronization, terminal, user

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 ----------------------
GMR-1 3G 45.010 3 ETSI TS 101 376-5-7 V3.4.1 (2015-10)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 7
Introduction . 7
1 Scope . 9
2 References . 9
2.1 Normative references . 9
2.2 Informative references . 10
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 11
4 General description of synchronization system . 11
4.0 Overview . 11
4.1 System timing structure . 11
4.2 Timebase counter . 12
4.3 General requirement . 12
4.3.1 Timing and frequency reference point . 12
4.3.2 MES requirement . 12
4.3.3 Network requirement . 13
4.3.4 Measurement conditions . 13
5 Timing synchronization, TtG/GtT Session. . 13
5.0 Overview . 13
5.1 General description. 13
5.2 Timing of forward link common channels . 14
5.2.0 General . 14
5.2.1 FCCH/BCCH timing. 14
5.2.2 CCCH timing . 14
5.3 Idle mode timing synchronization . 15
5.3.1 Initial timing acquisition . 15
5.3.2 Paging mode . 15
5.3.3 Alerting mode . 15
5.4 Synchronization at initial access . 15
5.4.1 Synchronization process . 15
5.4.2 RACH timing pre-correction . 16
5.4.3 Description of parameters . 18
5.4.4 Timing accuracy . 19
5.5 Dedicated mode synchronization (A/Gb mode only) . 19
5.5.0 General . 19
5.5.1 In-call timing relationship (A/Gb mode only) . 19
5.5.2 In-call synchronization scenario (A/Gb mode only) . 20
5.5.3 Transmission timing drift rate (A/Gb mode only) . 21
5.5.4 RX/TX guard time violation (A/Gb mode only) . 22
5.6 Packet transfer mode synchronization . 22
5.6.0 General . 22
5.6.1 Packet transfer mode timing relationship. 22
5.6.2 Time synchronization for Packet switched channels . 24
5.6.3 Transmission timing drift rate . 27
5.6.4 RX/TX guard time violation . 27
5.6.5 Packet transfer mode timing relationship for handover to dedicated packet channel (Iu mode only) . 27
5.6.6 Packet transfer mode timing for handover to shared packet channel (Iu mode only) . 28
6 Frequency synchronization, TtG/GtT call . 29
6.0 Overview . 29
6.1 General description. 29
ETSI

---------------------- Page: 3 ----------------------
GMR-1 3G 45.010 4 ETSI TS 101 376-5-7 V3.4.1 (2015-10)
6.2 Frequency of common channels . 29
6.3 Idle mode frequency synchronization. 29
6.3.1 Initial frequency acquisition . 29
6.3.2 Paging mode . 29
6.3.3 Alerting mode . 30
6.4 Synchronization at initial access . 30
6.4.0 General . 30
6.4.1 Frequency compensation strategy . 30
6.4.2 Parameter description . 31
6.5 Dedicated mode synchronization (A/Gb mode only) . 32
6.6 Frequency synchronization for the packet switched channels . 33
7 Frame and message synchronization, TtG/GtT call . 35
7.1 Frame synchronization . 35
7.1.1 Frame number definition . 35
7.1.2 Frame synchronization scenario . 36
7.2 Message synchronization . 36
7.2.1 Power control message synchronization . 36
7.2.1.0 General . 36
7.2.1.1 Synchronization in master-to-slave direction (A/Gb mode only). 37
7.2.1.2 Synchronization in slave-to-master direction (A/Gb mode only). 37
7.2.1.3 DCH power control message synchronization in forward direction . 38
7.2.1.4 DCH power control message synchronization in return direction . 38
7.2.2 SACCH message synchronization, TCH6/TCH9 call (A/Gb mode only) . 38
8 Synchronization for TtT call (A/Gb mode only) . 38
8.0 General . 38
8.1 Timing synchronization . 40
8.1.1 General description . 40
8.1.2 Initial access. 40
8.1.2.0 General . 40
8.1.2.1 Synchronization procedure . 40
8.1.2.2 Basic requirement . 41
8.1.3 TtG channel synchronization . 41
8.1.3.0 General . 41
8.1.3.1 Basic requirement . 42
8.1.4 Transition from TtG-to-TtT channel . 42
8.1.4.0 General . 42
8.1.4.1 Synchronization procedure . 42
8.1.4.2 Basic requirement . 42
8.1.5 TtT channel synchronization. 42
8.1.5.0 General . 42
8.1.5.1 Synchronization procedure . 43
8.1.5.2 Basic requirement . 43
8.1.6 Effect of the half symbol offset (TtT call) . 43
8.2 Frequency synchronization . 44
8.2.1 General description . 44
8.2.2 Synchronization at initial access . 45
8.2.2.0 General . 45
8.2.2.1 Synchronization procedure . 45
8.2.2.2 Basic requirement . 46
8.2.3 TtG channel synchronization . 46
8.2.3.0 General . 46
8.2.3.1 Basic requirement . 46
8.2.4 Transition from TtG-to-TtT channel . 46
8.2.4.0 General . 46
8.2.4.1 Synchronization procedure . 46
8.2.4.2 Basic requirement . 47
8.2.5 TtT channel synchronization. 47
8.2.5.0 General . 47
8.2.5.1 Synchronization procedure . 47
8.2.5.2 Basic requirement . 47
ETSI

---------------------- Page: 4 ----------------------
GMR-1 3G 45.010 5 ETSI TS 101 376-5-7 V3.4.1 (2015-10)
8.3 Frame synchronization . 47
9 Aeronautical terminal synchronization scheme . 48
9.1 MES special features . 48
9.1.1 Speed . 48
9.1.2 Worst-case delay and Doppler features . 48
9.1.3 Frequency offset . 49
9.2 Frequency synchronization . 49
9.2.1 Frequency synchronization general description . 49
9.2.2 Idle mode frequency synchronization . 49
9.2.2.1 Initial frequency acquisition . 49
9.2.2.2 Paging mode . 50
9.2.2.3 Alerting mode . 50
9.2.3 Synchronization at initial access . 50
9.2.3.1 Frequency compensation strategy . 50
9.2.3.2 Parameter description . 50
9.2.4 Dedicated mode synchronization . 51
9.2.4.0 General . 51
9.2.4.1 Frequency compensation strategy . 51
9.2.4.2 Parameter description . 51
9.3 Timing synchronization . 52
9.3.1 Timing synchronization general description . 52
9.3.2 Idle mode timing synchronization . 52
9.3.2.1 Initial timing acquisition . 52
9.3.2.2 Paging mode . 52
9.3.2.3 Alerting mode . 52
9.3.3 Synchronization at initial access . 52
9.3.4 Dedicated mode synchronization . 53
9.3.4.1 Doppler-based timing adjustment . 53
9.3.4.2 Standard timing synchronization procedure . 53
9.3.4.3 Parameter description . 53
Annex A (informative): Worst-case delay and Doppler features . 54
A.1 L-band . 54
A.2 S-band. 54
Annex B (informative): Range of timing correction factor . 56
Annex C (informative): Differential Doppler frequency . 57
Annex D (informative): SACCH message synchronization, TtG/GtT call (A/Gb mode only) . 58
D.0 General . 58
D.1 SACCH message synchronization scenario . 58
D.2 SACCH message-round trip delay . 58
Annex E (normative): Timer T3202 for packet mode of operation . 61
Annex F (normative): PTCCH/U and PTCCH/D scheduling (A/Gb mode only) . 62
Annex G (informative): Bibliography . 63
History . 64

ETSI

---------------------- Page: 5 ----------------------
GMR-1 3G 45.010 6 ETSI TS 101 376-5-7 V3.4.1 (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 contents of the present document are subject to continuing work within TC-SES and may change following formal
TC-SES approval. Should TC-SES modify the contents of the present document it will then be republished by ETSI
with an identifying change of release date and an increase in version number as follows:
Version 3.m.n
where:
• the third digit (n) is incremented when editorial only changes have been incorporated in the specification;
• the second digit (m) is incremented for all other types of changes, i.e. technical enhancements, corrections,
updates, etc.
The present document is part 5, sub-part 7 of a multi-part deliverable covering the GEO-Mobile Radio Interface
Specifications (Release 3); Third Generation Satellite Packet Radio Service, as identified below:
Part 1: "General specifications";
Part 2: "Service specifications";
Part 3: "Network specifications";
Part 4: "Radio interface protocol specifications";
Part 5: "Radio interface physical layer specifications":
Sub-part 1: "Physical Layer on the Radio Path: General Description; GMR-1 3G 45.001";
Sub-part 2: "Multiplexing and Multiple Access; Stage 2 Service Description; GMR-1 3G 45.002";
Sub-part 3: "Channel Coding; GMR-1 3G 45.003";
Sub-part 4: "Modulation; GMR-1 3G 45.004";
Sub-part 5: "Radio Transmission and Reception; GMR-1 3G 45.005";
Sub-part 6: "Radio Subsystem Link Control; GMR-1 3G 45.008";
Sub-part 7: "Radio Subsystem Synchronization; GMR-1 3G 45.010";
Part 6: "Speech coding specifications";
Part 7: "Terminal adaptor specifications".
ETSI

---------------------- Page: 6 ----------------------
GM
...