ETSI TS 102 361-1 V2.3.1 (2013-07)

ETSI TS 102 361-1 V2.3.1 (2013-07)






Technical Specification
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Digital Mobile Radio (DMR) Systems;
Part 1: DMR Air Interface (AI) protocol

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2 ETSI TS 102 361-1 V2.3.1 (2013-07)



Reference
RTS/ERM-TGDMR-313-1
Keywords
digital, PMR
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3 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

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4 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

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5 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
ETSI

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6 ETSI TS 102 361-1 V2.3.1 (2013-07)
9.3.19 Logical Link ID (LLID) . 101
9.3.20 Full message flag (F) . 101
9.3.21 Blocks to Follow (BF) . 102
9.3.22 Pad Octet Count (POC) . 102
9.3.23 Re-Synchronize Flag (S) .
...