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ETSI TS 102 361-1 V1.2.1 (2006-01)

Contents
Intellectual Property Rights ................................................................................................................................8
Foreword.............................................................................................................................................................8
1

Scope ........................................................................................................................................................9

2

References ................................................................................................................................................9

3

Definitions, symbols and abbreviations .................................................................................................10

3.1
3.2
3.3

4
4.1
4.1.1
4.1.2
4.1.3
4.2
4.2.1
4.2.2
4.3
4.4
4.4.1
4.4.2
4.5
4.6
4.6.1
4.6.2
4.6.3

5
5.1
5.1.1
5.1.1.1
5.1.1.2
5.1.2
5.1.2.1
5.1.2.2
5.1.2.3
5.1.3
5.1.3.1
5.1.3.2
5.1.4
5.1.4.1
5.1.4.2
5.1.4.3
5.1.4.4
5.1.4.5
5.1.5
5.1.5.1
5.1.5.2
5.1.5.3
5.1.5.4
5.2
5.2.1
5.2.1.1
5.2.1.2
5.2.1.3

Definitions........................................................................................................................................................10
Symbols............................................................................................................................................................12
Abbreviations ...................................................................................................................................................12

Overview ................................................................................................................................................14
Protocol architecture.........................................................................................................................................14
Air Interface Physical Layer (layer 1).........................................................................................................15
Air Interface Data Link Layer (layer 2) ......................................................................................................15
Air Interface Call Control Layer (layer 3) ..................................................................................................16
DMR TDMA Structure ....................................................................................................................................16
Overview of burst and channel structure ....................................................................................................16
Burst and frame structure............................................................................................................................18
Frame synchronization .....................................................................................................................................19
Timing references.............................................................................................................................................21
BS timing relationship ................................................................................................................................21
Direct mode timing relationship .................................................................................................................21
Common Announcement CHannel (CACH) ....................................................................................................21
Basic channel types ..........................................................................................................................................22
Traffic channel with CACH........................................................................................................................22
Traffic channel with guard time..................................................................................................................22
Bi-directional channel.................................................................................................................................23

Layer 2 protocol description...................................................................................................................24
Layer 2 timing ..................................................................................................................................................24
Channel timing relationship........................................................................................................................24
Aligned channel timing .........................................................................................................................24
Offset channel timing............................................................................................................................24
Voice timing ...............................................................................................................................................25
Voice superframe ..................................................................................................................................25
Voice initiation......................................................................................................................................25
Voice termination..................................................................................................................................26
Data timing .................................................................................................................................................27
Single slot data timing...........................................................................................................................27
Dual slot data timing .............................................................................................................................27
Traffic timing..............................................................................................................................................28
BS timing ..............................................................................................................................................28
Single frequency BS timing ..................................................................................................................29
Direct mode timing ...............................................................................................................................29
Time Division Duplex (TDD) timing....................................................................................................30
Continuous transmission mode .............................................................................................................30
Reverse Channel timing..............................................................................................................................30
Embedded outbound Reverse Channel..................................................................................................31
Dedicated outbound Reverse Channel ..................................................................................................31
Standalone inbound Reverse Channel...................................................................................................32
Direct mode Reverse Channel...............................................................................................................33
Channel access .................................................................................................................................................33
Basic channel access rules ..........................................................................................................................34
Types of channel activity ......................................................................................................................34
Channel status .......................................................................................................................................35
Timing master .......................................................................................................................................35

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