DMR协议第一部分：空中接口协议

DMR

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ETSI TS 102 361-1

V2.3.1 (2013-07)

Electromagnetic compatibility

and Radio spectrum Matters (ERM);

Digital Mobile Radio (DMR) Systems;

Part 1: DMR Air Interface (AI) protocol

Technical Specification

ETSI

ETSI TS 102 361

1 V2.3.1 (2013

07)

Contents

Intellectual Property Rights ................................................................................................................................ 8

Foreword ............................................................................................................................................................. 8

1 Scope ........................................................................................................................................................ 9

2 References ................................................................................................................................................ 9

2.1 Normative references ......................................................................................................................................... 9

2.2 Informative references ...................................................................................................................................... 10

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

3.1 Definitions ........................................................................................................................................................ 10

3.2 Symbols ............................................................................................................................................................ 13

3.3 Abbreviations ................................................................................................................................................... 13

4 Overview ................................................................................................................................................ 15

4.1 Protocol architecture......................................................................................................................................... 16

4.1.1 Air Interface Physical Layer (layer 1)......................................................................................................... 17

4.1.2 Air Interface Data Link Layer (layer 2) ...................................................................................................... 17

4.1.3 Air Interface Call Control Layer (CCL) (layer 3) ....................................................................................... 17

4.2 DMR TDMA structure ..................................................................................................................................... 18

4.2.1 Overview of burst and channel structure .................................................................................................... 18

4.2.2 Burst and frame structure ............................................................................................................................ 19

4.3 Frame synchronization ..................................................................................................................................... 20

4.4 Timing references ............................................................................................................................................. 22

4.4.1 Repeater mode BS established timing relationship ..................................................................................... 22

4.4.2 Repeater mode MS established timing relationship .................................................................................... 22

4.4.3 Direct mode timing relationship ................................................................................................................. 22

4.4.4 TDMA direct mode timing relationship...................................................................................................... 22

4.5 Common Announcement Channel (CACH) ..................................................................................................... 23

4.6 Basic channel types .......................................................................................................................................... 24

4.6.1 Traffic channel with CACH ........................................................................................................................ 24

4.6.2 Traffic channel with guard time .................................................................................................................. 24

4.6.3 Bi-directional channel ................................................................................................................................. 25

5 Layer 2 protocol description ................................................................................................................... 25

5.1 Layer 2 timing .................................................................................................................................................. 25

5.1.1 Channel timing relationship ........................................................................................................................ 25

5.1.1.1 Aligned channel timing ......................................................................................................................... 26

5.1.1.2 Offset channel timing ............................................................................................................................ 26

5.1.2 Voice timing ............................................................................................................................................... 26

5.1.2.1 Voice superframe .................................................................................................................................. 26

5.1.2.2 Voice initiation ...................................................................................................................................... 27

5.1.2.3 Voice termination .................................................................................................................................. 28

5.1.3 Data timing ................................................................................................................................................. 28

5.1.3.1 Single slot data timing ........................................................................................................................... 28

5.1.3.2 Dual slot data timing ............................................................................................................................. 29

5.1.4 Traffic timing .............................................................................................................................................. 29

5.1.4.1 BS timing .............................................................................................................................................. 29

5.1.4.2 Single frequency BS timing .................................................................................................................. 30

5.1.4.3 Direct mode timing ............................................................................................................................... 31

5.1.4.4 Time Division Duplex (TDD) timing .................................................................................................... 31

5.1.4.5 Continuous transmission mode ............................................................................................................. 31

5.1.4.6 TDMA direct mode timing .................................................................................................................... 32

5.1.5 Reverse Channel (RC) timing ..................................................................................................................... 32

5.1.5.1 Embedded outbound Reverse Channel (RC) ......................................................................................... 33

5.1.5.2 Dedicated outbound Reverse Channel (RC) ......................................................................................... 33

5.1.5.3 Standalone inbound Reverse Channel (RC) .......................................................................................... 34

5.1.5.4 Direct mode Reverse Channel (RC) ...................................................................................................... 34

ETSI

ETSI TS 102 361

1 V2.3.1 (2013

07)

5.2 Channel access ................................................................................................................................................. 35

5.2.1 Basic channel access rules .......................................................................................................................... 36

5.2.1.1 Types of channel activity ...................................................................................................................... 36

5.2.1.2 Channel status ....................................................................................................................................... 37

5.2.1.3 Timing master ....................................................................................................................................... 37

5.2.1.4 Hang time messages and timers ............................................................................................................ 38

5.2.1.5 Slot 1 and 2 dependency ....................................................................................................................... 38

5.2.1.6 Transmit admit criteria .......................................................................................................................... 38

5.2.1.7 Transmission re-tries ............................................................................................................................. 39

5.2.2 Channel access procedure ........................................................................................................................... 39

5.2.2.1 Direct mode Channel Access ................................................................................................................ 39

5.2.2.1.1 MS Out_of_Sync Channel Access................................................................................................... 40

5.2.2.1.2 MS Out_of_Sync_Channel_Monitored Channel Access ................................................................. 42

5.2.2.1.3 MS In_Sync_Unknown_System Channel Access ........................................................................... 43

5.2.2.1.4 MS Not_in_Call Channel Access .................................................................................................... 44

5.2.2.1.5 MS Others_Call Channel Access .................................................................................................... 44

5.2.2.1.6 MS My_Call Channel Access .......................................................................................................... 44

5.2.2.2 Repeater mode channel access .............................................................................................................. 44

5.2.2.2.1 MS Out_of_Sync Channel Access................................................................................................... 44

5.2.2.2.2 MS Out_of_Sync_Channel_Monitored Channel Access ................................................................. 46

5.2.2.2.3 MS In_Sync_Unknown_System channel access ............................................................................. 47

5.2.2.2.4 MS TX_Wakeup_Message .............................................................................................................. 48

5.2.2.2.5 MS Not_In_Call channel access ...................................................................................................... 49

5.2.2.2.6 MS Others_Call channel access ...................................................................................................... 50

5.2.2.2.7 MS My_Call channel access ............................................................................................................ 50

5.2.2.2.8 MS In_Session channel access ........................................................................................................ 50

5.2.2.3 Non-time critical CSBK ACK/NACK channel access .......................................................................... 50

5.2.2.4 TDMA direct mode channel access ...................................................................................................... 51

5.2.2.4.1 MS Out_of_Sync channel access .................................................................................................... 51

5.2.2.4.2 MS Out_of_Sync_Channel_Monitored channel access ................................................................... 54

5.2.2.4.3 MS In_Sync_Unknown_System channel access ............................................................................. 55

5.2.2.4.4 MS Not_in_Call channel access ...................................................................................................... 56

5.2.2.4.5 MS Others_Call channel access ...................................................................................................... 56

5.2.2.4.6 MS My_Call channel access ............................................................................................................ 56

5.2.2.4.7 Immediate response channel access................................................................................................. 56

6 Layer 2 burst format ............................................................................................................................... 56

6.1 Vocoder socket ................................................................................................................................................. 57

6.2 Data and control ............................................................................................................................................... 58

6.3 Common Announcement Channel burst ........................................................................................................... 59

6.4 Reverse Channel ............................................................................................................................................... 60

6.4.1 Standalone inbound Reverse Channel burst ................................................................................................ 60

6.4.2 Outbound reverse channel (RC) burst ......................................................................................................... 61

7 DMR signalling ...................................................................................................................................... 61

7.1 Link Control message structure ........................................................................................................................ 61

7.1.1 Voice LC header ......................................................................................................................................... 62

7.1.2 Terminator with LC .................................................................................................................................... 63

7.1.3 Embedded signalling................................................................................................................................... 64

7.1.3.1 Outbound channel ................................................................................................................................. 64

7.1.3.2 Inbound channel .................................................................................................................................... 65

7.1.4 Short Link Control in CACH ...................................................................................................................... 65

7.2 Control Signalling BlocK (CSBK) message structure ...................................................................................... 66

7.2.1 Control Signalling BlocK (CSBK) ............................................................................................................. 66

7.3 Idle message ..................................................................................................................................................... 67

7.4 Multi Block Control (MBC) message structure................................................................................................ 68

7.4.1 Multi Block Control (MBC) ....................................................................................................................... 69

8 DMR Packet Data Protocol (PDP) ......................................................................................................... 71

8.1 Internet Protocol ............................................................................................................................................... 71

8.2 Datagram fragmentation and re-assembly ........................................................................................................ 72

8.2.1 Header block structure ................................................................................................................................ 73

8.2.1.1 Unconfirmed data Header ..................................................................................................................... 74

ETSI

TS 102 361

1 V2.3.1 (2013

07)

8.2.1.2 Confirmed data header .......................................................................................................................... 75

8.2.1.3 Response data header ............................................................................................................................ 75

8.2.1.4 Proprietary data header ......................................................................................................................... 75

8.2.1.5 Status/precoded short data header ......................................................................................................... 76

8.2.1.6 Raw short data header ........................................................................................................................... 77

8.2.1.7 Defined short data header ...................................................................................................................... 77

8.2.1.8 Unified Data Transport (UDT) data header........................................................................................... 78

8.2.2 Data block structure .................................................................................................................................... 78

8.2.2.1 Unconfirmed data block structure ......................................................................................................... 78

8.2.2.2 Confirmed data block structure ............................................................................................................. 81

8.2.2.3 Response packet format ........................................................................................................................ 84

8.2.2.4 Hang time for response packet .............................................................................................................. 85

8.2.2.5 Unified Data Transport (UDT) last data block structure ....................................................................... 86

9 Layer 2 PDU description ........................................................................................................................ 87

9.1 PDUs for voice bursts, general data bursts and the CACH .............................................................................. 87

9.1.1 Synchronization (SYNC) PDU ................................................................................................................... 87

9.1.2 Embedded signalling (EMB) PDU ............................................................................................................. 88

9.1.3 Slot Type (SLOT) PDU .............................................................................................................................. 88

9.1.4 TACT PDU ................................................................................................................................................. 89

9.1.5 Reverse Channel (RC) PDU ....................................................................................................................... 89

9.1.6 Full Link Control (FULL LC) PDU ............................................................................................................ 89

9.1.7 Short Link Control (SHORT LC) PDU ...................................................................................................... 89

9.1.8 Control Signalling Block (CSBK) PDU ..................................................................................................... 90

9.1.9 Pseudo Random Fill Bit (PR FILL) PDU ................................................................................................... 90

9.2 Data related PDU description ........................................................................................................................... 90

9.2.1 Confirmed packet Header (C_HEAD) PDU ............................................................................................... 90

9.2.2 Rate ¾ coded packet Data (R_3_4_DATA) PDU ...................................................................................... 91

9.2.3 Rate ¾ coded Last Data block (R_3_4_LDATA) PDU .............................................................................. 91

9.2.4 Confirmed Response packet Header (C_RHEAD) PDU ............................................................................ 92

9.2.5 Confirmed Response packet Data (C_RDATA) PDU ................................................................................ 92

9.2.6 Unconfirmed data packet Header (U_HEAD) PDU ................................................................................... 92

9.2.7 Rate ½ coded packet Data (R_1_2_DATA) PDU ...................................................................................... 93

9.2.8 Rate ½ coded Last Data block (R_1_2_LDATA) PDU .............................................................................. 93

9.2.9 Proprietary Header (P_HEAD) PDU .......................................................................................................... 94

9.2.10 Status/Precoded short data packet Header (SP_HEAD) PDU .................................................................... 94

9.2.11 Raw short data packet Header (R_HEAD) PDU ........................................................................................ 94

9.2.12 Defined Data short data packet Header (DD_HEAD) PDU ....................................................................... 95

9.2.13 Unified Data Transport Header (UDT_HEAD) PDU ................................................................................. 95

9.2.14 Unified Data Transport Last Data block (UDT_LDATA) PDU ................................................................. 95

9.2.15 Rate 1 coded packet Data (R_1_DATA) PDU ........................................................................................... 96

9.2.16 Rate 1 coded Last Data block (R_1_LDATA) PDU ................................................................................... 96

9.3 Layer 2 information element coding ................................................................................................................ 97

9.3.1 Colour Code (CC) ....................................................................................................................................... 97

9.3.2 Privacy Indicator (PI).................................................................................................................................. 97

9.3.3 LC Start/Stop (LCSS) ................................................................................................................................. 97

9.3.4 EMB parity ................................................................................................................................................. 97

9.3.5 Feature set ID (FID) .................................................................................................................................... 98

9.3.6 Data Type.................................................................................................................................................... 98

9.3.7 Slot Type parity .......................................................................................................................................... 98

9.3.8 Access Type (AT) ....................................................................................................................................... 99

9.3.9 TDMA Channel (TC).................................................................................................................................. 99

9.3.10 Protect Flag (PF) ......................................................................................................................................... 99

9.3.11 Full Link Control Opcode (FLCO) ............................................................................................................. 99

9.3.12 Short Link Control Opcode (SLCO) ........................................................................................................... 99

9.3.13 TACT parity.............................................................................................................................................. 100

9.3.14 RC parity ................................................................................................................................................... 100

9.3.15 Group or Individual (G/I) ......................................................................................................................... 100

9.3.16 Response Requested (A) ........................................................................................................................... 100

9.3.17 Data Packet Format (DPF) ........................................................................................................................ 100

9.3.17A Header Compression (HC) ........................................................................................................................ 101

9.3.18 SAP identifier (SAP) ................................................................................................................................ 101

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