ETSI TS 101 376-5-2 V3.2.1 (2011-02)

GEO-Mobile Radio Interface Specifications (Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer specifications; Sub-part 2: Multiplexing and Multiple Access; Stage 2 Service Description; GMR-1 3G 45.002

RTS/SES-00315-5-2

General Information

• Status: Published
• Publication Date: 21-Feb-2011
• Technical Committee: SES MSS - SES WG on Mobile Satellite Systems
• Current Stage: 12 - Completion
• Due Date: 14-Mar-2011
• Completion Date: 22-Feb-2011

Standards Content (Sample)

Technical Specification
GEO-Mobile Radio Interface Specifications (Release 3);
Third Generation Satellite Packet Radio Service;
Part 5: Radio interface physical layer specifications;
Sub-part 2: Multiplexing and Multiple Access;
Stage 2 Service Description;
GMR-1 3G 45.002
GMR-1 3G 45.002 2 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

Reference
RTS/SES-00315-5-2
Keywords
3G, GMPRS, GMR, GPRS, GSM, GSO,
interface, MES, mobile, MSS, MUX, radio,
satellite, S-PCN, TDMA
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ETSI
GMR-1 3G 45.002 3 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

Contents
Intellectual Property Rights . 7
Foreword . 7
Introduction . 8
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 11
3 Definitions and abbreviations . 11
3.1 Definitions . 11
3.2 Abbreviations . 11
4 General . 11
5 Logical channels . 11
5.1 General . 11
5.2 Traffic channels . 11
5.2.1 General . 11
5.2.2 Speech traffic channels . 12
5.2.3 Data traffic channels . 12
5.2.4 Summary of traffic channel characteristics . 12
5.2.5 Packet Data Traffic CHannels (PDTCH) (A/Gb mode only) . 12
5.2.5a Packet Data Traffic Channels (PDTCH3) (Iu mode only) . 13
5.2.6 Packet Mode Dedicated Channels (Iu mode only) . 14
5.3 Control channels . 15
5.3.1 General . 15
5.3.2 Broadcast channels . 15
5.3.2.1 Frequency Correction CHannel (FCCH) . 15
5.3.2.2 GPS Broadcast control CHannel (GBCH) . 15
5.3.2.3 Broadcast Control CHannel (BCCH) . 15
5.3.3 Common Control Channel (CCCH) . 15
5.3.4 Dedicated control channels . 15
5.3.5 Cell Broadcast CHannel (CBCH) . 15
5.3.6 Packet Common Control CHannels (PCCCH) . 15
5.3.7 Packet dedicated control channels . 16
6 The physical resource . 16
6.1 General . 16
6.2 Radio frequency channels. 16
6.2.1 Spot beam allocation . 16
6.2.2 Downlink and uplink . 16
6.3 Timeslots and TDMA frames . 16
6.3.1 General . 16
6.3.2 Timeslot number . 16
6.3.3 TDMA frame number . 16
7 Bursts . 16
7.1 General . 16
7.2 Timing . 17
7.2.1 Half-symbol period . 17
7.2.2 Useful duration . 17
7.2.3 Guard period . 18
7.3 Multiple unique word patterns in bursts . 18
7.4 Types of bursts . 18
7.4.1 BACH burst . 18
7.4.2 BCCH burst . 18
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GMR-1 3G 45.002 4 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

7.4.3 CICH burst . 18
7.4.4 DC2 burst . 18
7.4.5 DC6 burst . 18
7.4.6 DKAB bursts . 18
7.4.6.1 KAB3 burst . 18
7.4.7 FCCH burst . 19
7.4.7.1 FCCH3 burst . 19
7.4.8 NT3 burst . 20
7.4.8.1 NT3 burst for encoded speech . 20
7.4.8.2 NT3 burst for FACCH . 20
7.4.9 NT6 burst . 20
7.4.10 NT9 burst . 20
7.4.11 RACH burst . 20
7.4.11.1 RACH3 burst. 20
7.4.12 SDCCH burst . 20
7.4.13 Packet Normal Bursts (PNB) . 21
7.4.13.1 Burst header . 25
7.4.13.1.1 Guard bits . 25
7.4.13.1.2 Unique Word (UW) . 25
7.4.13.1.3 PUblic Information (PUI) field . 26
7.4.13.1.4 Transition symbols . 26
7.4.13.2 Encoded PRivate Information (PRI) . 26
7.4.13.3 Formats of packet normal burst . 27
7.4.13.3.1 Void . 27
7.4.13.3.2 PNB(4,3). 27
7.4.13.3.3 PNB(5,3). 27
7.4.13.3.4 PNB(1,6). 28
7.4.13.3.5 PNB(2,6). 28
7.4.13.3.6 LDCP coded PNB2(5,12)/Downlink . 29
7.4.13.3.7 LDPC coded PNB2(5,12)/Uplink . 30
7.4.13.3.8 LDPC coded PNB2(5,3)/Downlink . 30
7.4.13.3.9 LDPC coded PNB2(5,3)/Uplink . 31
7.4.13.3.10 PNB3(5,12)/Uplink . 32
7.4.13.3.11 PNB3(5 ,12)/Downli nk . 32
7.4.13.3.12 PNB3(5,3)/Uplink . 33
7.4.13.3.13 PNB3(5,3)/Downlink . 34
7.4.13.3.14 PNB3(10,3) Downlink . 35
7.4.13.3.15 PNB3(1,3) Burst . 36
7.4.13.3.16 PNB3(1,6) burst . 37
7.4.13.3.17 PNB3(1,8) burst . 38
7.4.13.3.18 P NB3(2 ,6) . 39
7.4.14 Packet Access Burst (PAB) . 39
7.4.15 Packet Keep-Alive Burst (PKAB) . 40
7.4.16 DC12 burst . 42
8 Logical-physical channel mapping . 43
8.1 General . 43
8.1.1 Frequency-domain description. 43
8.1.2 Time-domain description . 43
8.1.2.1 Physical channels . 43
8.1.2.2 Logical channels . 43
8.2 Physical Channel (PC) types and names . 43
8.3 Logical channel parameters . 43
8.4 Permitted channel configurations . 44
8.5 Logical channel frame sequencing concepts . 44
8.5.1 Simple frame sequence . 44
8.5.1.1 Simple frame sequence subchannels . 44
8.5.2 Simple paired-frame sequence . 44
8.5.2.1 Simple paired-frame sequence subchannels . 44
8.5.3 Configured paired-frame sequence . 44
8.5.3.1 CBCH configuration . 44
8.5.4 Statistically multiplexed paired-frame sequence . 44
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GMR-1 3G 45.002 5 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

8.5.4.1 Pool size . 44
8.5.4.2 Statistically multiplexed paired-frame sequence subchannels . 44
8.5.4.3 Example using SDCCH . 45
8.5.5 System information cycle sequencing. 45
8.5.5.1 Physical-Channel-Relative Timeslot Number (PCRTN) . 45
8.5.5.2 System-Information-Relative Frame Number (SIRFN) . 45
8.5.5.3 Graphical representation of system information cycle timeslots . 45
8.6 Mapping of logical channels to BCCH/CCCH . 45
8.6.1 Fixed reserved-slot logical channels . 45
8.6.1.1 FCCH . 45
8.6.1.1a FCCH3 . 45
8.6.1.2 CICH . 45
8.6.1.3 BCCH . 45
8.6.2 Optional reserved-slot logical channels . 46
8.6.2.1 PCH . 47
8.6.2.2 BACH (A/Gb mode only) . 49
8.6.3 Unreserved-slot logical channels . 49
8.7 Mapping of logical channels to normal CCCH . 49
8.7a Mapping of logical channels to SI extended/AGCH/CCCH (Iu mode only) . 50
8.8 Mapping in time of packet logical channels onto physical channels . 51
8.8.1 General . 51
8.8.2 Mapping of the uplink channels . 52
8.8.2.1 Mapping of uplink packet traffic channel (PDTCH/U) and PACCH/U . 52
8.8.2.2 Mapping of the packet timing advance control channel (PTCCH/U) (A/Gb mode only) . 52
8.8.2.3 Mapping of the uplink PCCCH, i.e. PRACH (A/Gb mode only) . 52
8.8.2.3a Mapping of the uplink PCCCH, i.e. PRACH3 (Iu mode only) . 53
8.8.3 Mapping of the downlink channels . 53
8.8.3.1 Mapping of the (PDTCH/D) and PACCH/D . 53
8.8.3.2 Mapping of the PTCCH/D (A/Gb mode only) . 53
8.8.3.3 Mapping of the PBCCH . 54
8.8.3.4 Mapping of the PCCCH . 54
8.8.4 Mapping of PBCCH data . 54
8.8.5 Permitted combination of packet data channels . 54
8.9 Multislot configurations . 54
8.9.1 Multislot configurations for circuit switched connections . 54
8.9.2 Multislot configurations for packet switched connections . 54
9 Operation of channels . 55
9.1 PC6d and PC12u pairing . 55
9.1a PC12d and PC12u pairing . 55
9.2 Bidirectional channel timeslot assignments. 55
9.3 GBCH . 55
9.3a GBCH3 . 55
9.4 DKABs . 55
9.5 FCCH and CICH . 56
9.6 TACCH/2 . 56
9.7 MES monitoring of paging and alerting groups . 56
9.7.1 Determination of assigned CCCH . 56
9.7.2 Determination of assigned paging group . 56
9.7.3 Determination of alerting group. 56
9.7.4 Determination of PCCCH_GROUP and PAGING_GROUP for MES in GMPRS attached mode . 56
9.8 MES selection of PC12U . 56
9.9 SDCCH vs. CBCH . 57
9.10 MES monitors paired CCCH for AGCH . 57
9.11 Additional air interface constraints. 57
10 BCCH parameters . 57
10.1 Types of BCCH parameters. 57
10.2 Information used to obtain synchronization . 57
10.3 Channel meta-information . 57
10.4 Beam-configurable multichannel information . 57
10.5 Information specific to one instance of a channel . 57
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GMR-1 3G 45.002 6 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

Annex A (normative): Multislot capability . 58
A.1 MES classes for multislot capability . 58
A.2 Constraints imposed by the service selected . 59
A.3 Network requirements for supporting MES multislot classes . 59
Annex B (informative): Asymmetrical pairing of PDCH/D(2,m) with PDCH/U(1,m) . 60
Annex C (normative): GMR-1 3G Terminal Types . 61
Annex D (informative): Bibliography . 70
History . 71

ETSI
GMR-1 3G 45.002 7 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

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://webapp.etsi.org/IPR/home.asp).
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 2 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";
Sub-part 2: "Multiplexing and Multiple Access; Stage 2 Service Description";
Sub-part 3: "Channel Coding";
Sub-part 4: "Modulation";
Sub-part 5: "Radio Transmission and Reception";
Sub-part 6: "Radio Subsystem Link Control";
Sub-part 7: "Radio Subsystem Synchronization";
Part 6: "Speech coding specifications";
Part 7: "Terminal adaptor specifications".
ETSI
GMR-1 3G 45.002 8 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

Introduction
GMR stands for GEO (Geostationary Earth Orbit) Mobile Radio interface, which is used for Mobile Satellite Services
(MSS) utilizing geostationary satellite(s). GMR is derived from the terrestrial digital cellular standard GSM and
supports access to GSM core networks.
The present document is part of the GMR Release 3 specifications. Release 3 specifications are identified in the title
and can also be identified by the version number:
• Release 1 specifications have a GMR 1 prefix in the title and a version number starting with "1" (V1.x.x).
• Release 2 specifications have a GMPRS 1 prefix in the title and a version number starting with "2" (V2.x.x).
• Release 3 specifications have a GMR-1 3G prefix in the title and a version number starting with "3" (V3.x.x).
The GMR release 1 specifications introduce the GEO Mobile Radio interface specifications for circuit mode Mobile
Satellite Services (MSS) utilizing geostationary satellite(s). GMR release 1 is derived from the terrestrial digital cellular
standard GSM (phase 2) and it supports access to GSM core networks.
The GMR release 2 specifications add packet mode services to GMR release 1. The GMR release 2 specifications
introduce the GEO Mobile Packet Radio Service (GMPRS). GMPRS is derived from the terrestrial digital cellular
standard GPRS (included in GSM Phase 2+) and it supports access to GSM/GPRS core networks.
The GMR release 3 specifications evolve packet mode services of GMR release 2 to 3rd generation UMTS compatible
services. The GMR release 3 specifications introduce the GEO-Mobile Radio Third Generation (GMR-1 3G) service.
Where applicable, GMR-1 3G is derived from the terrestrial digital cellular standard 3GPP and it supports access to
3GPP core networks.
Due to the differences between terrestrial and satellite channels, some modifications to the GSM or 3GPP standard are
necessary. Some GSM and 3GPP specifications are directly applicable, whereas others are applicable with
modifications. Similarly, some GSM and 3GPP specifications do not apply, while some GMR specifications have no
corresponding GSM or 3GPP specification.
Since GMR is derived from GSM and 3GPP, the organization of the GMR specifications closely follows that of GSM
or 3GPP as appropriate. The GMR numbers have been designed to correspond to the GSM and 3GPP numbering
system. All GMR specifications are allocated a unique GMR number. This GMR number has a different prefix for
Release 2 and Release 3 specifications as follows:
• Release 1: GMR n xx.zyy.
• Release 2: GMPRS n xx.zyy.
• Release 3: GMR-1 3G xx.zyy.
where:
- xx.0yy (z = 0) is used for GMR specifications that have a corresponding GSM or 3GPP specification. In
this case, the numbers xx and yy correspond to the GSM or 3GPP numbering scheme.
- xx.2yy (z = 2) is used for GMR specifications that do not correspond to a GSM or 3GPP specification. In
this case, only the number xx corresponds to the GSM or 3GPP numbering scheme and the number yy is
allocated by GMR.
- n denotes the first (n = 1) or second (n = 2) family of GMR specifications.
ETSI
GMR-1 3G 45.002 9 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

A GMR system is defined by the combination of a family of GMR specifications and GSM and 3GPP specifications as
follows:
• If a GMR specification exists it takes precedence over the corresponding GSM or 3GPP specification (if any).
This precedence rule applies to any references in the corresponding GSM or 3GPP specifications.
NOTE: Any references to GSM or 3GPP specifications within the GMR specifications are not subject to this
precedence rule. For example, a GMR specification may contain specific references to the corresponding
GSM or 3GPP specification.
• If a GMR specification does not exist, the corresponding GSM or 3GPP specification may or may not apply.
The applicability of the GSM or 3GPP specifications is defined in GMR-1 3G 41.201 [2].
ETSI
GMR-1 3G 45.002 10 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

1 Scope
The present document defines the structure of the physical channels for the radio subsystem in the GMR-1 3G Mobile
Satellite System. It describes the GMR-1 3G concept of logical channels and the timing concepts of TDMA frames,
timeslots, and bursts. It defines the relationship between logical and physical channels, and defines the logical channels
in terms of size, structure and timing relationships.
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
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.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers
to the latest version of that document in the same Release as the present document.
[1] GMPRS-1 01.004 (ETSI TS 101 376-1-1): "GEO-Mobile Radio Interface Specifications
(Release 2) General Packet Radio Service; Part 1: General specifications;
Sub-part 1: Abbreviations and acronyms".
NOTE: This is a reference to a GMR-1 Release 2 specification. See the introduction for more details.
[2] GMR-1 3G 41.201 (ETSI TS 101 376-1-2): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 1: General specifications;
Sub-part 2: Introduction to the GMR-1 family".
[3] GMR-1 3G 44.008 (ETSI TS 101 376-4-8): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 4: Radio interface protocol
specifications; Sub-part 8: Mobile Radio Interface Layer 3 Specifications".
[4] GMR-1 3G 45.003 (ETSI TS 101 376-5-3): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer
specifications; Sub-part 3: Channel Coding".
[5] GMR-1 3G 45.004 (ETSI TS 101 376-5-4): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer
specifications; Sub-part 4: Modulation".
[6] GMR-1 3G 45.005 (ETSI TS 101 376-5-5): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer
specifications; Sub-part 5: Radio Transmission and Reception".
[7] GMR-1 3G 45.010 (ETSI TS 101 376-5-7): "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".
[8] GMR-1 3G 43.064 (ETSI TS 101 376-3-22): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 3: Network specifications;
Sub-part 22: Overall description of the GMPRS radio interface; Stage 2".
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GMR-1 3G 45.002 11 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

[9] GMR-1 3G 44.060 (ETSI TS 101 376-4-12): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 4: Radio interface protocol
specifications; Sub-part 12: Mobile Earth Station (MES) - Base Station System (BSS) interface;
Radio Link Control/Medium Access Control (RLC/MAC) protocol".
[10] GMR-1 05.002 (ETSI TS 101 376-5-2): "GEO-Mobile Radio Interface Specifications;
Part 5: Radio interface physical layer specifications; Sub-part 2: Multiplexing and Multiple
Access; Stage 2 Service Description".
NOTE: This is a reference to a GMR-1 Release 1 specification. See the introduction for more details.
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.
Not applicable.
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in GMR-1 3G 41.201 [2] apply.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in GMPRS-1 01.004 [1] apply.
4 General
Same as clause 4 in GMR-1 05.002 [10].
5 Logical channels
5.1 General
Same as clause 5.1 in GMR-1 05.002 [10].
5.2 Traffic channels
5.2.1 General
TCHs are intended to carry either encoded speech or user data. Three general types of traffic channels are defined:
1) TCH3: This channel carries data at a gross rate of 5,20 kbps.
2) TCH6: This channel carries data at a gross rate of 10,75 kbps.
3) TCH9: This channel carries data at a gross rate of 16,45 kbps.
The data gross rate is defined as the number of encoded bits in NT3, NT6 and NT9 burst, respectively, excluding the
number of power control bits, divided by 40 ms frame time.
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GMR-1 3G 45.002 12 ETSI TS 101 376-5-2 V3.2.1 (2011-02)

All traffic channels are bidirectional.
The types of traffic channels capable of speech and user data are identified in the following clauses.
5.2.2 Speech traffic channels
Same as clause 5.2.2 in GMR-1 05.002 [10].
5.2.3 Data traffic channels
Same as clause 5.2.3 in GMR-1 05.002 [10].
5.2.4 Summary of traffic channel characteristics
Table 5.1 summarizes the characteristics of traffic channels, where the gross transmission rate is the channel
transmission bit rate (2 times channel transmission symbol rate) multiplied by the duty cycle of the channel.
Table 5.1: Summary of traffic channel characteristics
Channel type User information capability Gross transmission rate
TCH3 Encoded speech 5,85 kbps (= 46,8 / 8)
TCH6 User data: 4,8 kbps 11,70 kbps (= 46,8 / 8 x 2)
Fax: 2 kbps, 4 kbps or 4,8 kbps
TCH9 User data: 9,6 kbps 17,55 kbps (= 46,8 / 8 x 3)
Fax: 2 kbps, 4 kbps, 4,8 kbps,
or 9,6 kbps
5.2.5 Packet Data Traffic CHannels (PDTCH) (A/Gb mode only)
The following Packet Data Traffic CHannels (PDTCH) apply to A/Gb mode.
A PDTCH corresponds to the resource allocated to a single MES on one physical channel for user data transmission.
Different logical channels may be dynamically multiplexed on to the same PDTCH. The PDTCH uses π/2-BPSK,
π/4-QPSK,16 APSK, or 32 APSK modulation. All packet data traffic channels are unidirectional, either uplink
(PDTCH/U), for a mobile-originated packet transfer or downlink (PDTCH/D) for a mobile-terminated packet transfer.
PDTCH and PDTCH2 traffic data channels may be multiplexed on the same physical carrier.
PDTCHs are used to carry packet data traffic. Different PDTCHs are defined by the suffix (m,n) where m indicates the
bandwidth of the physical channel in which the PDTCH
...