ETSI TS 101 376-3-22 V2.3.1 (2008-08)

ETSI TS 101 376-3-22 V2.3.1 (2008-08)
Technical Specification

GEO-Mobile Radio Interface Specifications (Release 2)
General Packet Radio Service;
Part 3: Network specifications;
Sub-part 22: Overall description of
the GMPRS radio interface;
Stage 2;
GMPRS-1 03.064

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GMPRS-1 03.064 2 ETSI TS 101 376-3-22 V2.3.1 (2008-08)




Reference
RTS/SES-00303-3-22
Keywords
GMPRS, GMR, GPRS, GSM, GSO, mobile,
MSS, radio, satellite, S-PCN
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GMPRS-1 03.064 3 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

Contents
Intellectual Property Rights.6
Foreword.6
Introduction .7
1 Scope.9
2 References.10
2.1 Normative references.10
2.2 Informative references.11
3 Definitions, symbols and abbreviations .12
3.1 Definitions.12
3.2 Symbols.12
3.3 Abbreviations.12
4 Packet data logical channels.12
4.1 General.12
4.2 Packet Common Control Channel (PCCCH) .12
4.2.1 Packet Random Access Channel (PRACH) - uplink only .13
4.2.2 Packet Paging Channel (PPCH) - downlink only .13
4.2.3 Packet Access Grant Channel (PAGCH) - downlink only.13
4.2.4 Packet Notification Channel (PNCH) and compact packet notification channel - downlink only .13
4.3 Packet Broadcast Control Channel (PBCCH) - downlink only.13
4.4 Packet traffic channels.13
4.4.1 Packet Data Traffic Channel (PDTCH) .13
4.5 Packet dedicated control channels.13
4.5.1 Packet Associated Control Channel (PACCH).13
4.5.2 Packet Timing Advance Control Channel, Uplink (PTCCH/U) .13
4.5.3 Packet Timing Advance Control Channel, Downlink (PTCCH/D) .14
5 Mapping of packet data logical channels onto physical channels.14
5.1 General.14
5.2 Packet Common Control Channels (PCCCH).14
5.2.1 Packet Random Access Channel (PRACH).14
5.2.1.1 PRACH on the same carrier.14
5.2.1.2 PRACH on a separate carrier .15
5.2.2 Packet Paging Channel (PPCH).15
5.2.3 Packet Access Grant Channel (PAGCH) .15
5.2.4 Packet Notification Channel (PNCH).15
5.3 Packet Broadcast Control Channel (PBCCH) .15
5.3.1 Compact Frequency Correction Channel (CFCCH) .15
5.3.2 Compact Synchronization Channel (CSCH).15
5.4 Packet Timing Advance Control Channel (PTCCH).15
5.5 Packet traffic channels.16
5.5.1 Packet Data Traffic Channel (PDTCH) .16
5.5.2 Packet Associated Control Channel (PACCH).16
5.6 Downlink resource sharing.16
5.7 Uplink resource sharing.16
5.8 Asymmetrical Pairing of PDCH/D(2,m) with PDCH/U(1,m).17
6 Radio interface (Um).17
6.1 Radio resource management principles.17
6.1.1 Allocation of resources for GMPRS-1.17
6.1.1.1 Master-slave concept.17
6.1.1.2 Capacity on demand concept.17
6.1.1.3 Procedures to support capacity on demand .18
6.1.1.4 Release of PDCH not carrying PCCCH .18
6.1.2 Multiframe structure for PDCH.18
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GMPRS-1 03.064 4 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

6.1.2.1 Multiframe structure for compact PDCH.19
6.1.3 Scheduling of PBCCH information .19
6.1.4 SMS cell broadcast .19
6.2 Radio resource operating modes .19
6.2.1 Packet idle mode.19
6.2.2 Packet transfer mode.19
6.2.3 Correspondence between radio resource operating modes and mobility management states.19
6.3 Layered overview of radio interface.20
6.4 Physical RF layer.20
6.5 Physical link layer .21
6.5.1 Layer services.21
6.5.2 Layer functions.21
6.5.3 Service primitives.22
6.5.4 Radio burst structure.22
6.5.5 Channel coding.23
6.5.5.1 Channel coding for PDTCH.23
6.5.5.1.1 Channel coding for PDTCH .23
6.5.5.2 Channel coding for PACCH, PAGCH and PTCCH.27
6.5.5.2.1 Channel coding for CPBCCH, CPAGCH, CPPCH, CPNCH, and CSCH.27
6.5.5.3 Channel coding for the PRACH.27
6.5.5.3.1 Coding of the 64 data bit packet access burst.27
6.5.5.3.2 Coding of the 11 data bit packet access burst.28
6.5.6 Spotbeam reselection.28
6.5.6.1 Measurements for spotbeam reselection .28
6.5.6.2 Broadcast information.28
6.5.6.3 Optional measurement reports and network controlled cell reselection.28
6.5.7 Timing and frequency update procedure .28
6.5.7.1 Initial timing advance estimation .28
6.5.7.2 Continuous timing and frequency update procedure.28
6.5.7.2.1 Mapping on the multiframe structure .29
6.5.8 Power control procedure.29
6.5.8.1 MES output power .29
6.5.8.2 BSS output power .30
6.5.8.3 Measurements at MES side.30
6.5.8.3.1 Deriving the C value.30
6.5.8.3.2 Derivation of channel quality report.30
6.5.8.4 Measurements at BSS side .30
6.5.9 Scheduling the MES activities during the PTCCH and idle frames.30
6.5.10 Discontinuous Reception (DRX) .30
6.5.11 Rate adaptation.30
6.5.12 UpLink Quality Reports.30
6.6 Medium access control and radio link control layer.31
6.6.1 Layer services.31
6.6.2 Layer functions.31
6.6.3 Service primitives.32
6.6.4 Mode of operation.32
6.6.4.1 Multiplexing MESs on the same PDCH.33
6.6.4.1.1 Uplink state flag: dynamic allocation.33
6.6.4.1.2 Fixed allocation.33
6.6.4.2 Temporary block flow.33
6.6.4.2.1 Support for Streaming traffic.33
6.6.4.3 Temporary flow identity.34
6.6.4.4 Medium access modes.34
6.6.4.5 Acknowledged mode for RLC/MAC operation .34
6.6.4.5.1 GMPRS-1.34
6.6.4.6 Unacknowledged mode for RLC/MAC operation .34
6.6.4.7 Mobile originated packet transfer .35
6.6.4.7.1 Uplink access.35
6.6.4.7.2 Dynamic allocation.36
6.6.4.7.3 Fixed allocation.36
6.6.4.7.4 Contention resolution.36
6.6.4.7.5 Piggybacked messages and unsolicited resource grant.37
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GMPRS-1 03.064 5 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

6.6.4.8 Mobile terminated packet transfer.37
6.6.4.8.1 Packet paging.37
6.6.4.8.2 Downlink packet transfer.38
6.6.4.8.3 Release of the resources .39
6.6.4.9 Simultaneous uplink and downlink packet transfer.39
6.7 Abnormal cases in MES ready state.40
6.8 PTM-M data transfer .40
Annex A (informative): Bibliography.41
History .42

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GMPRS-1 03.064 6 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

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://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 2.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 3, sub-part 22 of a multi-part deliverable covering the GEO-Mobile Radio Interface
Specifications (Release 2) General Packet Radio Service, as identified below:
Part 1: "General specifications";
Part 2: "Service specifications";
Part 3: "Network specifications":
Sub-part 1: "Network Functions";
Sub-part 2: "Network Architecture";
Sub-part 3: "Numbering, Addressing and identification";
Sub-part 4: "Organization of Subscriber Data";
Sub-part 5: "Technical realization of Supplementary Services";
Sub-part 6: "Location Registration and Position Identification Procedures";
Sub-part 7: "Discontinuous Reception (DRX)";
Sub-part 8: "Support of Dual-Tone Multifrequency Signalling (DTMF)";
Sub-part 9: "Security related Network Functions";
Sub-part 10: "Functions related to Mobile Earth Station (MES) in idle mode";
Sub-part 11: "Technical realization of the Short Message Service (SMS) Point-to-Point (PP)";
Sub-part 12: "Technical realization of the Short Message Service Cell Broadcast (SMSCB)";
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GMPRS-1 03.064 7 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

Sub-part 13: "Technical realization of group 3 facsimile using transparent mode of transmission";
Sub-part 14: "Transmission Planning Aspects of the Speech Service in the GMR-1 system";
Sub-part 15: "Line Identification supplementary service - Stage 2";
Sub-part 16: "Call Barring (CB) supplementary services - Stage 2";
Sub-part 17: "Unstructured Supplementary Service Data (USSD) - Stage 2";
Sub-part 18: "Terminal-to-Terminal Call (TtT)";
Sub-part 19: "Optimal Routing technical realization";
Sub-part 20: "Technical realization of High-Penetration Alerting";
Sub-part 21: "Position Reporting services; Stage 2 Service description";
Sub-part 22: "Overall description of the GMPRS radio interface; Stage 2";
Part 4: "Radio interface protocol specifications";
Part 5: "Radio interface physical layer specifications";
Part 6: "Speech coding specifications";
Part 7: "Terminal adaptor specifications".
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 2 specifications. Release 2 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.).
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.
Due to the differences between terrestrial and satellite channels, some modifications to the GSM standard are necessary.
Some GSM specifications are directly applicable, whereas others are applicable with modifications. Similarly, some
GSM specifications do not apply, while some GMR specifications have no corresponding GSM specification.
Since GMR is derived from GSM, the organization of the GMR specifications closely follows that of GSM. The GMR
numbers have been designed to correspond to the GSM numbering system. All GMR specifications are allocated a
unique GMR number. This GMR number has a different prefix for Release 2 specifications as follows:
• Release 1: GMR-n xx.zyy.
• Release 2: GMPRS-n xx.zyy.
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GMPRS-1 03.064 8 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

where:
- xx.0yy (z = 0) is used for GMR specifications that have a corresponding GSM specification. In this case,
the numbers xx and yy correspond to the GSM numbering scheme.
- xx.2yy (z = 2) is used for GMR specifications that do not correspond to a GSM specification. In this
case, only the number xx corresponds to the GSM numbering scheme and the number yy is allocated by
GMR.
- n denotes the first (n = 1) or second (n = 2) family of GMR specifications.
A GMR system is defined by the combination of a family of GMR specifications and GSM specifications as follows:
• If a GMR specification exists it takes precedence over the corresponding GSM specification (if any). This
precedence rule applies to any references in the corresponding GSM specifications.
NOTE: Any references to GSM 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
specification.
• If a GMR specification does not exist, the corresponding GSM specification may or may not apply. The
applicability of the GSM specifications is defined in TS 101 376-1-2 [10].
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GMPRS-1 03.064 9 ETSI TS 101 376-3-22 V2.3.1 (2008-08)

1 Scope
The present document provides the overall description for lower-layer functions of the GEO-Mobile Packet Radio
Service (GMPRS-1) radio interface (Um).
The overall description provides the following information:
- The services offered to higher-layer functions.
- The distribution of required functions into functional groups.
- A definition of the capabilities of each functional group.
- Service primitives for each functional group, including a description of what services and information flows
are to be provided;
- A model of operation for information flows within and between the functions.
The present document is applicable to the following GMPRS-1 Um functional layers:
- Radio Link Control functions.
- Medium Access Control functions
- Physical Link Control functions.
The present document describes the information transfer and control functions to be used across the radio (Um)
interface for communication between the MES and the Network (see figure 1).
Um
MT Network

Figure 1: Scope of GMPRS-1 logical radio interface architecture
The overall GMPRS-1 logical architecture and the GMPRS-1 functional layers above the Radio Link Control and
Medium Access Control layer are the same as GSM/GPRS as described in TS 101 344 [3].
GMPRS-1 04.007 [5] contains a description in general terms of the structured functions and procedures of this protocol
and the relationship of this protocol with other layers and entities.
TS 101 376-4-8 [6] contains the definition of GMPRS-1 RLC/MAC procedures when operating on the Common
Control Channel (CCCH).
TS 101 376-4-12 [7] contains the definition of RLC/MAC functions when operati
...