ETSI TS 101 376-3-22 V3.2.1 (2011-02)

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; GMR-1 3G 43.064

RTS/SES-00315-3-22

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: 26-Jan-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 3: Network specifications;
Sub-part 22: Overall description of
the GMPRS radio interface;
Stage 2;
GMR-1 3G 43.064
GMR-1 3G 43.064 2 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

Reference
RTS/SES-00315-3-22
Keywords
3G, earth station, GMPRS, GMR, GPRS, GSM,
GSO, MES, mobile, MSS, radio, satellite
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ETSI
GMR-1 3G 43.064 3 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

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 . 11
3.1 Definitions . 11
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 Channels (PRACH) - uplink only . 12
4.2.2 Packet Paging Channel (PPCH) - downlink only . 12
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 Channels (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) (A/Gb mode only) . 13
4.5.3 Packet Timing Advance Control Channel, Downlink (PTCCH/D) (A/Gb mode only) . 13
4.5.4 Packet mode dedicated channels (DTCH) (Iu mode only) . 13
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) (A/Gb mode only) . 15
5.5 Packet traffic channels . 16
5.5.1 Packet Data Traffic Channel (PDTCH and PDTCH2) (A/Gb mode only) . 16
5.5.1a Packet Data Traffic Channel (PDTCH3) (Iu mode only) . 16
5.5.2 Packet Associated Control Channel (PACCH) . 16
5.6 Downlink resource sharing . 17
5.7 Uplink resource sharing (A/Gb mode) . 17
5.7a Uplink resource sharing (Iu mode) . 17
5.8 Asymmetrical Pairing of PDCH/D(2,m) with PDCH/U(1,m) . 17
6 Radio interface . 17
6.1 Radio resource management principles . 18
6.1.1 Allocation of resources for GMR-1 3G . 18
6.1.1.1 Master-slave concept . 18
6.1.1.2 Capacity on demand concept. 18
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GMR-1 3G 43.064 4 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

6.1.1.3 Procedures to support capacity on demand . 18
6.1.1.4 Release of PDCH not carrying PCCCH . 19
6.1.2 Multiframe structure for PDCH . 19
6.2 Radio resource operating modes . 19
6.2.1 Packet idle mode . 19
6.2.2 Packet transfer mode . 20
6.2.3 Correspondence between radio resource operating modes and mobility management states . 20
6.3 Layered overview of radio interface (A/Gb mode only) . 20
6.4 Physical RF layer . 21
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 (A/Gb mode) . 23
6.5.5.1 Channel coding for PDTCH and PDTCH2 . 24
6.5.5.1.1 Channel coding for PDTCH . 24
6.5.5.2 Channel coding for PACCH, PAGCH and PTCCH . 28
6.5.5.3 Channel coding for the PRACH . 28
6.5.5.3.1 Coding of the 64 data bit packet access burst . 28
6.5.5a Channel coding (Iu mode) . 28
6.5.5a.1 Channel coding for PDTCH3 . 29
6.5.5a.1.1 Channel coding for PDTCH3 . 29
6.5.5a.2 Channel coding for PACCH, and PAGCH . 31
6.5.5a.3 Channel coding for the PRACH3 . 31
6.5.5a.3.1 Coding of the 40 data bit packet access burst . 31
6.5.6 Spotbeam reselection . 31
6.5.7 Timing and frequency update procedure . 31
6.5.7.1 Initial timing advance estimation . 32
6.5.7.2 Continuous timing and frequency update procedure . 32
6.5.8 Power control procedure . 33
6.5.8.1 MES output power . 33
6.5.8.2 BSS output power . 33
6.5.8.3 Measurements at MES side . 33
6.5.8.4 Measurements at BSS side . 33
6.5.9 Void . 33
6.5.10 Discontinuous Reception (DRX) . 34
6.5.11 Rate adaptation . 34
6.5.12 UpLink Quality Reports . 34
6.6 Medium access control and radio link control layer . 34
6.6.1 Layer services . 34
6.6.2 Layer functions . 34
6.6.3 Service primitives . 35
6.6.4 Mode of operation . 35
6.6.4.1 Multiplexing MESs on the same PDCH. 36
6.6.4.1.1 Uplink state flag: dynamic allocation . 36
6.6.4.2 Temporary block flow . 37
6.6.4.2.1 Support for Streaming traffic . 37
6.6.4.3 Temporary flow identity . 37
6.6.4.4 Medium access modes . 37
6.6.4.5 Acknowledged mode for RLC/MAC operation . 37
6.6.4.5.1 GMR-1 3G . 37
6.6.4.6 Unacknowledged mode for RLC/MAC operation . 38
6.6.4.7 Mobile originated packet transfer . 38
6.6.4.7.1 Uplink access . 38
6.6.4.7.2 Dynamic allocation . 39
6.6.4.7.3 Void . 39
6.6.4.7.4 Contention resolution . 40
6.6.4.7.5 Piggybacked messages and unsolicited resource grant . 40
6.6.4.8 Mobile terminated packet transfer . 41
6.6.4.8.1 Packet paging . 41
6.6.4.8.2 Downlink packet transfer. 41
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GMR-1 3G 43.064 5 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

6.6.4.8.3 Release of the resources . 42
6.6.4.9 Simultaneous uplink and downlink packet transfer . 42
6.7 Abnormal cases in MES ready state . 43
Annex A (informative): Bibliography . 44
History . 45

ETSI
GMR-1 3G 43.064 6 ETSI TS 101 376-3-22 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 3, sub-part 22 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":
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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GMR-1 3G 43.064 7 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

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";
Sub-part 23: "Radio Access Network; Overall description - 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 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.
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GMR-1 3G 43.064 8 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

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.
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 or 3GPP specifications are not subject to
this precedence rule. For example, a GMR or 3GPP 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 [10].
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GMR-1 3G 43.064 9 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

1 Scope
The present document provides the overall description for lower-layer functions of the GEO-Mobile Radio Third
Generation Satellite Packet Radio Service (GMR-1 3G) radio interface.
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 GMR-1 3G 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 GMR-1 3G radio
interface for communication between the MES and the Network (see figure 1).
GMR-1 3G
MES Network
Figure 1: Scope of GMR-1 3G logical radio interface architecture
The overall GMR-1 3G logical architecture and the GMR-1 3G functional layers above the Radio Link Control and
Medium Access Control layer are the same as GSM/GPRS as described in 3GPP TS 23.060 [3].
GMR-1 3G 24.007 [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.
GMR-1 3G 44.008 [6] contains the definition of GMR-1 3G RLC/MAC procedures when operating on the Common
Control Channel (CCCH).
GMR-1 3G 44.060 [7] contains the definition of RLC/MAC functions when operating on a Packet Data Channel
(PDCH).
The functional procedures for the Logical Link Control (LLC) layer above the RLC/MAC are the same as GSM/GPRS
as described in 3GPP TS 44.064 [8].
GMR-1 05.001 and the GMR-1 3G 45-series defines the Physical Link layer and Physical RF layer (see [11] to [17]).
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GMR-1 3G 43.064 10 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

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] 3GPP TS 22.060 (ETSI TS 122 060): "3rd Generation Partnership Project; Technical Specification
Group Services and System Aspects; General Packet Radio Service (GPRS); Service description,
Stage 1 (Release 6)".
[3] 3GPP TS 23.060 (ETSI TS 123 060): "3rd Generation Partnership Project; Technical Specification
Group Services and System Aspects; General Packet Radio Service (GPRS); Service description;
Stage 2 (Release 6)".
[4] GMR-1 3G 44.004 (ETSI TS 101 376-4-4): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 4: Radio interface protocol
specifications; Sub-part 4: Layer 1 General Requirements".
[5] GMR-1 3G 24.007 (ETSI TS 101 376-4-7): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 4: Radio interface protocol
specifications; Sub-part 7: Mobile Radio Interface Signalling Layer 3 General Aspects".
[6] 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".
[7] 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".
[8] 3GPP TS 44.064 (ETSI TS 144 064): "3rd Generation Partnership Project; Technical Specification
Group Core Network; Mobile Station - Serving GPRS Support Node (MS-SGSN); Logical Link
Control (LLC) layer specification; (Release 6)".
[9] 3GPP TS 44.065 (ETSI TS 144 065): "3rd Generation Partnership Project; Technical Specification
Group Core Network and Terminals; Mobile Station (MS) - Serving GPRS Support Node (SGSN);
Subnetwork Dependent Convergence Protocol (SNDCP) (Release 6)".
[10] 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".
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GMR-1 3G 43.064 11 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

[11] GMR-1 05.001 (ETSI TS 101 376-5-1): "GEO-Mobile Radio Interface Specifications (Release 1);
Part 5: Radio interface physical layer specifications; Sub-part 1: Physical Layer on the Radio Path:
General Description".
NOTE: This is a reference to a GMR-1 Release 1 specification. See the introduction for more details.
[12] GMR-1 3G 45.002 (ETSI TS 101 376-5-2): "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".
[13] 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".
[14] 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".
[15] 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".
[16] GMR-1 3G 45.008 (ETSI TS 101 376-5-6): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 5: Radio interface physical layer
specifications; Sub-part 6: Radio Subsystem Link Control".
[17] 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".
[18] GMR-1 3G 43.022 (ETSI TS 101 376-3-10): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 3: Network specifications;
Sub-part 10: Functions related to Mobile Earth Station (MES) in idle mode".
[19] GMR-1 3G 43.051 (ETSI TS 101 376-3-23): "GEO-Mobile Radio Interface Specifications
(Release 3); Third Generation Satellite Packet Radio Service; Part 3: Network specifications;
Sub-part 23: Radio Access Network; Overall description - Stage 2".
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, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in GMR-1 3G 41.201 [10],
3GPP TS 22.060 [2] and 3GPP TS 23.060 [3] and the following apply:
A/Gb mode: mode of operation of the MES when connected to the Core Network via GERAN and the A and/or Gb
interfaces
Iu mode: mode of operation of the MES when connected to the Core Network via GERAN or UTRAN and the Iu
interface
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GMR-1 3G 43.064 12 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

3.2 Symbols
For the purposes of the present document, the following symbols apply:
GMR-1 3G Interface between MES and Satellite BSS
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in GMPRS-1 01.004 [1] and the following apply:
UAT Uplink Allocation Type
4 Packet data logical channels
NOTE: The text in this clause is informative. The normative text is in GMR-1 3G 45.002 [12]. Where there is a
conflict between these descriptions, the normative text has precedence.
4.1 General
This clause describes the packet data logical channels that are supported by the radio subsystem. The packet data logical
channels are mapped onto the physical channels that are dedicated to packet data.
The physical channel dedicated to packet data traffic is called a Packet Data Channel (PDCH) for A/Gb mode and
PDCH3 for Iu mode. A PDCH or PDCH3 can carry common control channel (PCCCH) with the data and dedicated
control channels.
Packet channels are defined for PDCH for 125 kHz and for 156,25 kHz carriers, which are each three timeslots or for
156,25 kHz which are twelve timeslots wide. Packet channels are also defined for PDCH for uplink 31,25 kHz carriers
and downlink 62,5 kHz carriers, which are six timeslots wide.
Packet channels are defined for PDCH3 for 156,25 and 312,5 kHz which are each three timeslots wide or for 31,25 and
62,5 kHz which are each six timeslots wide or for 156,25 kHz which are twelve timeslots wide. Timeslots are defined in
GMR-1 3G 45.002 [12].
In the context of RLC/MAC and other higher layers, the term MAC-slot is used to define a triad of timeslots containing
a single Packet Access Burst or Packet Normal Burst. Thus there can be eight packet channels or one or more CCCH
and packet channels carrying PCCCH in a 24 slot (8 MAC-slot) frame. The term 4-MAC-slot is used to define four
consecutive MAC slots or twelve consecutive timeslots. The starting MAC-slot of a 4-MAC-slot can be any one of the
eight MAC-slots in a frame. Depending on the starting MAC-slot, a 4-MAC-slot may span two consecutive frames.
An additional term is defined, which is the dual MAC-slot abbreviated as D-MAC-slot. A D-MAC-slot represents two
consecutive MAC slots or six consecutive timeslots. A D-MAC slot k (0 ≤ k ≤ 3) can be defined as a combination of
MAC-slot 2k and MAC-slot 2k + 1.
4.2 Packet Common Control Channel (PCCCH)
PCCCH comprise logical channels for common control signalling used for packet data as described in the following
clauses.
4.2.1 Packet Random Access Channels (PRACH) - uplink only
PRACH (A/Gb mode) or PRACH3 (Iu mode) are used by MES to initiate uplink transfer for sending data or signalling
information. Packet Access Burst (PAB) is used on PRACH and PAB3 is used on PRACH3.
4.2.2 Packet Paging Channel (PPCH) - downlink only
PPCH is not supported in the GMR-1 3G.
ETSI
GMR-1 3G 43.064 13 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

4.2.3 Packet Access Grant Channel (PAGCH) - downlink only
PAGCH is used in the packet transfer establishment phase to send resource assignment to an MES prior to packet
transfer.
4.2.4 Packet Notification Channel (PNCH) and compact packet notification
channel - downlink only
These logical channels are currently not supported.
4.3 Packet Broadcast Control Channel (PBCCH) - downlink
only
This logical channel is currently not supported.
For details of system information transmission for the GMR-1 3G air interface supporting packet data, refer to
GMR-1 3G 44.008 [6] for details.
4.4 Packet traffic channels
4.4.1 Packet Data Traffic Channels (PDTCH)
PDTCH, PDTCH2 and PDTCH3 are channels allocated for data transfer. In the multislot operation, one MES may use
multiple PDTCHs in parallel for individual packet transfer.
All packet data traffic channels are uni-directional, either uplink (PDTCH/U), for a mobile originated packet transfer or
downlink (PDTCH/D) for a mobile terminated packet transfer.
4.5 Packet dedicated control channels
4.5.1 Packet Associated Control Channel (PACCH)
PACCH conveys signalling information related to a given MES. The signalling information includes examples of
acknowledgments and power control information. PACCH also carries resource assignment and reassignment
messages, comprising the assignment of a capacity for PDTCH(s) and for further occurrences of PACCH. The PACCH
shares resources with PDTCHs that are currently assigned to one MES.
4.5.2 Packet Timing Advance Control Channel, Uplink (PTCCH/U) (A/Gb
mode only)
PTCCH/U is used to transmit packet normal burst to allow estimation of the timing advance for one MES in packet
transfer mode.
4.5.3 Packet Timing Advance Control Channel, Downlink (PTCCH/D)
(A/Gb mode only)
PTCCH/D is used to transmit timing advance information updates to several MES. One PTCCH/D is paired with up to
four PTCCH/Us. PTCCH/D is only transmitted on MAC slot 0.
4.5.4 Packet mode dedicated channels (DTCH) (Iu mode only)
A dedicated traffic channel is used to carry user traffic when a dedicated channel (DCH) is allocated to the MES. DTCH
are defined for 31,25 kHz carriers and are three, six or eight timeslots wide.
ETSI
GMR-1 3G 43.064 14 ETSI TS 101 376-3-22 V3.2.1 (2011-02)

5 Mapping of packet data logical channels onto
physical channels
NOTE: The text in this clause is informative. The normative text is in GMR-1 3G 45.002 [12]. Where there is a
conflict between these descriptions, the normative text has precedence.
5.1 General
Different packet data logical channels can occur on the same physical channel (PDCH for A/Gb mode or PDCH3 for Iu
mode). The sharing of the physical channel is based on MAC-slots, each of which corresponds to a single burst. The
mapping in frequency of PDCH or PDCH3 on to the physical channel shall be as defined in GMR-1 3G 45.002 [12].
On PRACH or PRACH3, packet access bursts (PAB or PAB3) are used. On all other packet data logical channels,
MAC/RLC blocks comprising a single Packet Normal Burst PNB(m, n), PNB2(m, n) or PNB3(m, n) is used,
corresponding to the PDCH, in the case of PNB or PNB2, or PDCH 3, in the case of PNB3 on which the logical channel
is allocated.
5.2 Packet Common Control Channels (PCCCH)
At a given time, the logical channels of the PCCCH are mapped on different physical resources than the logical
channels of the CCCH.
The PCCCH does not have to be allocated permanently in the cell.
One given MES may use only a subset of the PCCCH, the subset being mapped onto one physical channel (PDCH or
PDCH3).
The PCCCH, when it exists, is mapped on one or several physical channels according to a 16-multiframe; in that case
the PCCCH shares the same PDCH with PDTCH or PDTCH2 or the same PDCH3 with PDTCH3.
The existence and location of the PCCCH shall be broadcast on the BCCH in the spotbeam. The BCCH identifies each
frequency that carries the PCCCH and further information which helps the MES access the PCCCH.
5.2.1 Packet Random Access Channel (PRACH)
The PRACH is mapped on one or several p
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