ETSI TS 145 002 V14.6.0 (2020-04)

TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
GSM/EDGE Multiplexing and multiple access on the radio path
(3GPP TS 45.002 version 14.6.0 Release 14)

R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
3GPP TS 45.002 version 14.6.0 Release 14 1 ETSI TS 145 002 V14.6.0 (2020-04)

Reference
RTS/TSGR-0645002ve60
Keywords
GSM
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ETSI
3GPP TS 45.002 version 14.6.0 Release 14 2 ETSI TS 145 002 V14.6.0 (2020-04)
Intellectual Property Rights
Essential patents
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Legal Notice
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ETSI
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Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
1.1 References . 8
1.2 Abbreviations . 9
1.2a Definitions . 9
1.3 Restrictions . 9
2 General . 9
3 Logical channels . 10
3.1 General . 10
3.2 Traffic channels . 10
3.2.1 General . 10
3.2.2 Speech traffic channels . 10
3.2.3 Circuit switched data traffic channels . 11
3.2.4 Packet data traffic channels (PDTCH and EC-PDTCH) . 11
3.3 Control channels . 12
3.3.1 General . 12
3.3.2 Broadcast channels . 12
3.3.2.1 Frequency correction channels (FCCH and CFCCH) . 12
3.3.2.2 Synchronization channels . 12
3.3.2.2.0 General . 12
3.3.2.2.1 Synchronization channel (SCH) . 12
3.3.2.2.2 COMPACT synchronization channel (CSCH) . 12
3.3.2.2.3 Extended Coverage synchronization channel (EC-SCH) . 13
3.3.2.3 Broadcast control channel (BCCH) . 14
3.3.2.3a Extended coverage broadcast control channel (EC-BCCH) . 14
3.3.2.4 Packet Broadcast Control Channels . 15
3.3.2.4.1 Packet Broadcast Control Channel (PBCCH) . 15
3.3.2.4.2 COMPACT Packet Broadcast Control Channel (CPBCCH) . 15
3.3.3 Common control type channels . 16
3.3.3.1 Common control type channels, known when combined as a common control channel (CCCH) . 16
3.3.3.2 Packet Common control channels . 16
3.3.3.2.1 Packet Common Control Channels (PCCCH) . 16
3.3.3.2.2 COMPACT Common Control Channels (CPCCCH) . 16
3.3.3.2.3 MBMS Common Control Channels . 16
3.3.3.3 Extended Coverage Common Control Channels . 16
3.3.4 Dedicated control channels . 17
3.3.4.1 Circuit switched dedicated control channels . 17
3.3.4.2 Packet dedicated control channels . 17
3.3.4.3 Extended Coverage Packet dedicated control channels . 17
3.3.5 Cell Broadcast Channel (CBCH) . 18
3.3.6 CTS control channels . 18
3.3.6.1 CTS beacon channel (BCH) . 18
3.3.6.2 CTS paging channel (CTSPCH) . 18
3.3.6.3 CTS access request channel (CTSARCH) . 18
3.3.6.4 CTS access grant channel (CTSAGCH) . 18
3.4 Combination of channels . 18
4 The physical resource . 19
4.1 General . 19
4.2 Radio frequency channels. 19
4.2.1 Cell allocation and mobile allocation. 19
4.2.2 Downlink and uplink . 19
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4.3 Timeslots, TDMA frames, and time groups . 19
4.3.1 General . 19
4.3.2 Timeslot number . 19
4.3.3 TDMA frame number . 20
4.3.4 Time group. 20
5 Physical channels . 20
5.1 General . 20
5.2 Bursts . 20
5.2.1 General . 20
5.2.2 Types of burst and burst timing . 20
5.2.3 Normal burst (NB) . 22
5.2.3.1 Normal burst for GMSK . 22
5.2.3.2 Normal burst for AQPSK (downlink only) . 24
5.2.3.3 Normal burst for 8PSK . 24
5.2.3.4 Normal burst for 16QAM . 25
5.2.3.5 Normal burst for 32QAM . 27
5.2.3a Higher symbol rate burst (HB) . 28
5.2.4 Frequency correction burst (FB) . 31
5.2.5 Synchronization Burst (SB) . 32
5.2.6 Dummy burst (DB) . 32
5.2.7 Access burst (AB) . 33
5.2.8 Guard period . 34
5.2.9 Extended Access burst (Extended AB) . 34
5.2.10 Extended Synchronization Access burst (ESAB) . 35
5.2.11 Extended Dual Slot Access burst (EDAB) . 35
5.3 Physical channels and bursts . 37
5.4 Radio frequency channel sequence . 37
5.5 Timeslot and TDMA frame sequence . 37
5.6 Parameters for channel definition and assignment . 37
5.6.1 General . 37
5.6.2 General parameters . 37
5.6.2.1 General . 37
5.6.2.2 COMPACT . 37
5.6.2.3 EC-GSM-IoT . 38
5.6.3 Specific parameters . 38
6 Mapping of logical channels onto physical channels . 38
6.1 General . 38
6.2 Mapping in frequency of logical channels onto physical channels . 39
6.2.1 General . 39
6.2.2 Parameters. 39
6.2.3 Hopping sequence generation . 40
6.2.4 Specific cases . 41
6.2.5 Change in the frequency allocation of a base transceiver station. 42
6.2.6 Frequency assignment in CTS . 42
6.2.7 Mapping restrictions in downlink multi-carrier configurations . 42
6.3 Mapping in time of logical channels onto physical channels . 43
6.3.1 Mapping in time of circuit switched logical channels onto physical channels . 43
6.3.1.1 General . 43
6.3.1.2 Key to the mapping table of clause 7 . 43
6.3.1.3 Mapping of BCCH data . 44
6.3.1.4 Mapping of SID Frames . 46
6.3.2 Mapping in time of packet logical channels onto physical channels . 46
6.3.2.1 General . 46
6.3.2.2 Mapping of the uplink channels . 48
6.3.2.2.1 Mapping of (EC-)PDTCH/U and (EC-)PACCH/U . 48
6.3.2.2.1.1 BTTI configuration . 48
6.3.2.2.1.2 RTTI configuration . 49
6.3.2.2.2 Mapping of the Packet Timing Advance Control Channel (PTCCH/U) . 50
6.3.2.2.3 Mapping of the uplink PCCCH i.e. PRACH . 50
6.3.2.2.3a Mapping of the COMPACT uplink CPCCCH i.e. CPRACH . 50
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6.3.2.2.4 Mapping of the MBMS uplink MPRACH . 50
6.3.2.2.5 Void . 50
6.3.2.2.6 Mapping of Overlaid CDMA sub channels . 50
6.3.2.3 Mapping of the downlink channels . 51
6.3.2.3.1 Mapping of the (EC-)PDTCH/D and (EC-)PACCH/D . 51
6.3.2.3.2 Mapping of the PTCCH/D . 51
6.3.2.3.3 Mapping of the PBCCH . 52
6.3.2.3.3a Mapping of the COMPACT CPBCCH . 52
6.3.2.3.3b Void . 52
6.3.2.3.4 Mapping of the PCCCH . 52
6.3.2.3.4a Mapping of the COMPACT CPCCCH . 52
6.3.2.3.4b Void . 53
6.3.2.4 Mapping of PBCCH data . 53
6.3.2.4a Mapping of COMPACT CPBCCH data . 53
6.3.2.4b Void. 54
6.3.3 Mapping in time of CTS control channels onto physical channels . 54
6.3.3.1 CTSBCH timeslot assignment . 54
6.3.3.2 CTSPCH, CTSARCH and CTSAGCH timeslot assignment . 55
6.3.4 Mapping in time of Extended Coverage control channels onto physical channels . 56
6.3.4.1 General . 56
6.3.4.2 Mapping of the downlink Extended Coverage CCCH (EC-CCCH/D) . 56
6.3.4.3 Mapping of the uplink Extended Coverage CCCH (EC-CCCH/U) . 56
6.3.4.4 Mapping of EC-BCCH data . 56
6.4 Permitted channel combinations . 57
6.4.1 Permitted channel combinations onto a basic physical channel. 57
6.4.2 Multislot configurations . 61
6.4.2.1 General . 61
6.4.2.1 Multislot configurations for circuit switched connections in A/Gb mode . 61
6.4.2.2 Multislot configurations for packet switched connections in A/Gb mode . 62
6.4.2.3 Multislot configurations for dual transfer mode in A/Gb mode . 65
6.4.2.3a Multislot configurations for MBMS in A/Gb mode . 66
6.4.2.4 Multislot configurations for DBPSCH in Iu mode . 67
6.4.2.4.1 TCHs assigned . 67
6.4.2.4.2 PDTCHs assigned . 67
6.4.2.4.3 TCHs and PDTCHs assigned . 67
6.4.2.5 void . 67
6.4.2.6 Multislot configurations for SBPSCH in Iu mode . 67
6.4.2.7 Multislot configurations for dual transfer mode in Iu mode . 67
6.5 Operation of channels and channel combinations . 68
6.5.1 General . 68
6.5.2 Determination of CCCH_GROUP and PAGING_GROUP for MS in idle mode . 71
6.5.2a Determination of CCCH_GROUP, PAGING_GROUP_MF and PAGING_GROUP_PCH for MS in
idle mode when using extended DRX cycles . 71
6.5.2b Determination of EC_CCCH_GROUP and PAGING_GROUP for MS in idle mode for EC-GSM-

IoT . 72
6.5.3 Determination of specific paging multiframe and paging block index . 73
6.5.3a Determination of specific paging multiframe and paging block index for EC-GSM-IoT . 74
6.5.3a.1 CC1 . 74
6.5.3a.2 CC2 . 74
6.5.3a.3 CC3 . 74
6.5.3a.4 CC4 . 74
6.5.3b Determination of specific paging multiframe and paging block index when using extended DRX
cycles . 74
6.5.4 Short Message Service Cell Broadcast (SMSCB) . 75
6.5.5 Voice group and voice broadcast call notifications . 75
6.5.6 Determination of PCCCH_GROUP and PAGING_GROUP for MS in GPRS attached mode . 75
6.5.6a Determination of extended DRX cycle for MS in GPRS attached mode. 76
6.5.7 Determination of CTS_PAGING_GROUP and specific paging 52-multiframe for MS in CTS mode . 77
6.5.8 Determination of single carrier fallback group . 77
7 Mapping tables . 79
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8 Flexible layer one . 115
8.1 General . 115
8.2 Transport channels . 115
8.3 Mapping of transport channels onto physical channels . 115
8.3.1 General . 115
8.3.2 Mapping in frequency of transport channels onto physical channels . 115
8.3.3 Mapping in time of transport channels onto physical channels . 115
8.3.4 Permitted channel combinations onto a basic physical subchannel . 118
8.3.5 Multislot configurations . 119
8.3.5.1 Multislot configurations for DBPSCHs assigned . 119
8.3.5.2 Multislot configurations for dual transfer mode in Iu mode . 119
Annex A (normative): Phase 2 mobiles in a Phase 1 infrastructure . 120
A.1 Scope . 120
A.2 Implementation options for TCH channels . 120
A.2.1 C0 filling on the TCH . 120
A.2.1.1 A dummy burst with (BN61, BN62, BN86) = training sequence bits of normal bursts . 120
A.2.1.2 A dummy burst with the "C0 filling training sequence. 120
A.2.1.3 A dummy burst with ( BN61, BN62, BN86) mapped from the TSC bits of normal bursts according
to the table. 120
A.2.1.4 Partial SID information . 120
A.2.2 Half burst filling . 120
A.2.2.1 Partial SID information from any associated SID frame; or . 121
A.2.2.2 The mixed bits of the dummy bursts (encrypted or not encrypted) . 121
A.2.3 Dummy burst Stealing flag . 121
A.2.4 Half burst Filling Stealing flag . 121
A.2.5 Allowed combinations . 121
A.3 Idle Channels . 121
Annex B (normative): Multislot capability . 122
B.1 MS classes for multislot capability . 122
B.2 Constraints imposed by the service selected . 125
B.3 Network requirements for supporting MS multislot classes . 125
B.4 Multislot capabilities for dual carrier mobile stations . 127
B.5 Multislot capabilities when EFTA is used. 129
B.6 Multislot capabilities for Downlink Multi Carrier mobile stations . 130
Annex C (informative): CTSBCH Timeslot shifting example . 131
Annex D (informative): COMPACT multiframe structure examples . 132
Annex E (informative): Example illustrations of neighbour cell measurements for downlink
dual carrier MS . 140
Annex F (informative): Illustration of mapping restrictions in Downlink Multi Carrier . 141
Annex G (informative): Change history . 144
History . 149

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Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
ETSI
3GPP TS 45.002 version 14.6.0 Release 14 8 ETSI TS 145 002 V14.6.0 (2020-04)
1 Scope
The present document defines the physical channels of the radio sub-system required to support the logical channels.
For the Flexible Layer One, it defines the physical channels of the radio sub-system required to support the transport
channels. It includes a description of the logical channels, transport channels and the definition of frequency hopping,
TDMA frames, timeslots and bursts.
1.1 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. 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] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications ".
[2] 3GPP TS 23.003: "Numbering, addressing and identification".
[3] 3GPP TS 23.034: “High Speed Circuit Switched Data (HSCSD) – Stage 2”.
[4] 3GPP TS 43.052: "GSM Cordless Telephony System (CTS), Phase 1; Lower layers of the CTS
Radio Interface; Stage 2".
[5] 3GPP TS 43.059: “Functional stage 2 description of Location Services (LCS) in GERAN”.
[6] 3GPP TS 43.064: "General Packet Radio Service (GPRS); Overall description of the GPRS Radio
Interface; Stage 2".
[7] 3GPP TS 43.246: "Multimedia Broadcast Multicast Service (MBMS) in the GERAN; Stage 2".
[8] 3GPP TS 44.003: "Mobile Station - Base Station System (MS - BSS) interface Channel structures
and access capabilities".
[9] 3GPP TS 44.006: "Mobile Station - Base Station System (MS - BSS) interface Data Link (DL)
layer specification".
[10] 3GPP TS 44.018: "Mobile radio interface layer 3 specification, Radio Resource Control Protocol".
[11] 3GPP TS 44.060: "General Packet Radio Service (GPRS); Mobile Station (MS) - Base Station
System (BSS interface; Radio Link Control (RLC) and Medium Access Control (MAC) Layer
Specification".
[12] 3GPP TS 44.056: "GSM Cordless Telephony System (CTS), Phase 1; CTS radio interface layer 3
specification".
[13] 3GPP TS 45.003: "Channel coding".
[14] 3GPP TS 45.004: "Modulation".
[15] 3GPP TS 45.005: "Radio transmission and reception".
[16] 3GPP TS 45.008: "Radio subsystem link control".
[17] 3GPP TS 45.010: "Radio subsystem synchronization".
[18] 3GPP TS 45.056: "GSM Cordless Telephony System (CTS), Phase 1; CTS-FP radio subsystem".
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[19] 3GPP TR 45.902: “Flexible Layer One”.
[20] 3GPP TS 46.031: “Discontinuous Transmission (DTX) for full rate speech traffic channels”.
[21] 3GPP TS 24.008: "Mobile Radio Interface Layer 3 specification; Core Network Protocols -
Stage 3".
[22] 3GPP TS 23.060: "General Packet Radio Service (GPRS); Service Description; Stage 2".
1.2 Abbreviations
Abbreviations used in the present document are listed in 3GPP TR 21.905 [1]. In addition to abbreviations in 3GPP TR
21.905 [1], the following abbreviations are applied:
BTTI Basic Transmission Time Interval
EDAB Extended Dual slot Access Burst
ESAB Extended Synchronization Access Burst
FANR Fast Ack/Nack Reporting
RTTI Reduced Transmission Time Interval
TTI Transmission Time Interval
1.2a Definitions
Coverage Class: see definition in 3GPP TS 43.064 [6].
EC-GSM-IoT: see definition in 3GPP TS 43.064 [6].
EC operation: see definition in 3GPP TS 43.064 [6].
1.3 Restrictions
Independently of what is stated elsewhere in this and other 3GPP specifications, mobile station support for PBCCH and
PCCCH is optional for A/Gb-mode of operation. The network shall never enable PBCCH and PCCCH.
2 General
The radio subsystem is required to support a certain number of logical channels that can be separated into two
categories as defined in 3GPP TS 44.003:
i) the traffic channels (TCH's);
ii) the control channels.
More information is given about these logical channels in clause 3 which also defines a number of special channels used
by the radio sub-system.
Clause 4 of this document describes the physical resource available to the radio sub-system, clause 5 defines physical
channels based on that resource and clause 6 specifies how the logical channels shall be mapped onto physical channels.
Figure 1 depicts this process.
With the Flexible Layer One (FLO), the radio subsystem is required to support transport channels (see 3GPP TR
45.902). Clause 8 of this document describes the mapping and multiplexing principles that are specific to FLO. Because
FLO offers transport channels instead of logical channels, any reference to logical channels, with the exception of
SACCH, does not apply to FLO. Otherwise, and unless otherwise stated, the multiplexing principles described in this
document are equally applicable to FLO (e.g. physical resource and physical channels).
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3 Logical channels
3.1 General
This subclause describes the logical channels that are supported by the radio subsystem.
3.2 Traffic channels
3.2.1 General
Traffic channels (TCH's) are intended to carry either encoded speech or user data in circuit switched mode. Five general
forms of traffic channel are defined:
i) Full rate traffic channel (TCH/F). This channel carries information at a gross rate of 22,8 kbit/s.
ii) Half rate traffic channel (TCH/H). This channel carries information at a gross rate of 11,4 kbit/s.
iii) Enhanced circuit switched full rate traffic channel (E-TCH/F). This channel carries information at a gross rate of
69,6 kbit/s including the stealing symbols.
iv) 8-PSK full rate traffic channel (O-TCH/F). This channel carries information at a gross rate of 68,4 kbit/s.
v) 8-PSK half rate traffic channel (O-TCH/H). This channel carries information at a gross rate of 34,2 kbit/s.
Packet data traffic channels (PDTCH's) are intended to carry user data in packet switched mode. For the purpose of this
Technical Specification, any reference to traffic channel does not apply to PDTCH unless explicitly stated.
All traffic channels are bi-directional unless otherwise stated. Unidir
...