ETSI TS 102 361-1 V2.4.1 (2016-02)

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

RTS/ERM-TGDMR-326

General Information

• Status: Published
• Publication Date: 11-Feb-2016
• Technical Committee: ERM TGDMR - Digital Mobile Radio
• Current Stage: 12 - Completion
• Due Date: 06-Jan-2016
• Completion Date: 12-Feb-2016

Standards Content (Sample)

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

2 ETSI TS 102 361-1 V2.4.1 (2016-02)

Reference
RTS/ERM-TGDMR-326
Keywords
digital, PMR
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ETSI
3 ETSI TS 102 361-1 V2.4.1 (2016-02)
Contents
Foreword . 9
Modal verbs terminology . 9
1 Scope . 10
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 . 14
3.3 Abbreviations . 14
4 Overview . 16
4.0 Overview introduction . 16
4.1 Protocol architecture. 17
4.1.0 Protocol architecture - Introduction . 17
4.1.1 Air Interface Physical Layer (layer 1). 18
4.1.2 Air Interface Data Link Layer (layer 2) . 19
4.1.3 Air Interface Call Control Layer (CCL) (layer 3) . 19
4.2 DMR TDMA structure . 19
4.2.1 Overview of burst and channel structure . 19
4.2.2 Burst and frame structure . 21
4.3 Frame synchronization . 22
4.4 Timing references . 24
4.4.1 Repeater mode BS established timing relationship . 24
4.4.2 Repeater mode MS established timing relationship . 24
4.4.3 Direct mode timing relationship . 24
4.4.4 TDMA direct mode timing relationship. 24
4.5 Common Announcement Channel (CACH) . 24
4.6 Basic channel types . 25
4.6.1 Traffic channel with CACH . 25
4.6.2 Traffic channel with guard time . 26
4.6.3 Bi-directional channel . 26
5 Layer 2 protocol description . 27
5.0 Layer 2 protocol description - Introduction . 27
5.1 Layer 2 timing . 27
5.1.1 Channel timing relationship . 27
5.1.1.0 Channel timing relationship - Introduction . 27
5.1.1.1 Aligned channel timing . 28
5.1.1.2 Offset channel timing . 28
5.1.2 Voice timing . 28
5.1.2.1 Voice superframe . 28
5.1.2.2 Voice initiation . 29
5.1.2.3 Voice termination . 30
5.1.3 Data timing . 30
5.1.3.0 Data timing - Introduction . 30
5.1.3.1 Single slot data timing . 30
5.1.3.2 Dual slot data timing . 31
5.1.4 Traffic timing . 31
5.1.4.1 BS timing . 31
5.1.4.2 Single frequency BS timing . 32
5.1.4.3 Direct mode timing . 33
5.1.4.4 Time Division Duplex (TDD) timing . 33
5.1.4.5 Continuous transmission mode . 33
5.1.4.6 TDMA direct mode timing . 34
5.1.5 Reverse Channel (RC) timing . 34
5.1.5.0 Reverse Channel (RC) timing - Introduction . 34
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4 ETSI TS 102 361-1 V2.4.1 (2016-02)
5.1.5.1 Embedded outbound Reverse Channel (RC) . 34
5.1.5.2 Dedicated outbound Reverse Channel (RC) . 35
5.1.5.3 Standalone inbound Reverse Channel (RC) . 36
5.1.5.4 Direct mode Reverse Channel (RC) . 36
5.2 Channel access . 37
5.2.0 Channel access - Introduction . 37
5.2.1 Basic channel access rules . 38
5.2.1.1 Types of channel activity . 38
5.2.1.2 Channel status . 39
5.2.1.3 Timing master . 39
5.2.1.4 Hang time messages and timers . 39
5.2.1.5 Slot 1 and 2 dependency . 39
5.2.1.6 Transmit admit criteria . 40
5.2.1.7 Transmission re-tries . 40
5.2.2 Channel access procedure . 41
5.2.2.0 Channel access procedure - Introduction . 41
5.2.2.1 Direct mode Channel Access . 41
5.2.2.1.0 Direct mode Channel Access - Introduction . 41
5.2.2.1.1 MS Out_of_Sync Channel Access. 41
5.2.2.1.2 MS Out_of_Sync_Channel_Monitored Channel Access . 43
5.2.2.1.3 MS In_Sync_Unknown_System Channel Access . 44
5.2.2.1.4 MS Not_in_Call Channel Access . 45
5.2.2.1.5 MS Others_Call Channel Access . 45
5.2.2.1.6 MS My_Call Channel Access . 45
5.2.2.2 Repeater mode channel access . 45
5.2.2.2.0 Repeater mode channel access- Introduction. 45
5.2.2.2.1 MS Out_of_Sync Channel Access. 45
5.2.2.2.2 MS Out_of_Sync_Channel_Monitored Channel Access . 47
5.2.2.2.3 MS In_Sync_Unknown_System channel access . 48
5.2.2.2.4 MS TX_Wakeup_Message . 49
5.2.2.2.5 MS Not_In_Call channel access . 50
5.2.2.2.6 MS Others_Call channel access . 51
5.2.2.2.7 MS My_Call channel access . 51
5.2.2.2.8 MS In_Session channel access . 51
5.2.2.3 Non-time critical CSBK ACK/NACK channel access . 51
5.2.2.4 TDMA direct mode channel access . 52
5.2.2.4.0 TDMA direct mode channel access - Introduction . 52
5.2.2.4.1 MS Out_of_Sync channel access . 52
5.2.2.4.2 MS Out_of_Sync_Channel_Monitored channel access . 55
5.2.2.4.3 MS In_Sync_Unknown_System channel access . 56
5.2.2.4.4 MS Not_in_Call channel access . 57
5.2.2.4.5 MS Others_Call channel access . 57
5.2.2.4.6 MS My_Call channel access . 57
5.2.2.4.7 Immediate response channel access. 57
6 Layer 2 burst format . 57
6.0 Layer 2 burst format - Introduction . 57
6.1 Vocoder socket . 58
6.2 Data and control . 59
6.3 Common Announcement Channel burst . 60
6.4 Reverse Channel . 61
6.4.1 Standalone inbound Reverse Channel burst . 61
6.4.2 Outbound reverse channel (RC) burst . 62
7 DMR signalling . 62
7.1 Link Control message structure . 62
7.1.0 Link Control message structure - Introduction . 62
7.1.1 Voice LC header . 63
7.1.2 Terminator with LC . 64
7.1.3 Embedded signalling. 65
7.1.3.0 Embedded signalling - Introduction . 65
7.1.3.1 Outbound channel . 65
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5 ETSI TS 102 361-1 V2.4.1 (2016-02)
7.1.3.2 Inbound channel . 66
7.1.4 Short Link Control in CACH . 66
7.2 Control Signalling BlocK (CSBK) message structure . 67
7.2.0 Control Signaling BlocK (CSBK) message structure - Introduction . 67
7.2.1 Control Signalling BlocK (CSBK) . 67
7.3 Idle message . 68
7.4 Multi Block Control (MBC) message structure. 69
7.4.0 Multi Block Control (MBC) message structure - Introduction . 69
7.4.1 Multi Block Control (MBC) . 70
8 DMR Packet Data Protocol (PDP) . . 72
8.0 DMR Packet Data Protocol (PDP) - Introduction . 72
8.1 Internet Protocol . 72
8.2 Datagram fragmentation and re-assembly . 73
8.2.0 Datagram fragmentation and re-assembly - Introduction . 73
8.2.1 Header block structure . 74
8.2.1.0 Header block structure - Introduction . 74
8.2.1.1 Unconfirmed data Header . 75
8.2.1.2 Confirmed data header . 76
8.2.1.3 Response data header . 76
8.2.1.4 Proprietary data header . 76
8.2.1.5 Status/precoded short data header . 77
8.2.1.6 Raw short data header . 78
8.2.1.7 Defined short data header . 78
8.2.1.8 Unified Data Transport (UDT) data header. 79
8.2.2 Data block structure . 79
8.2.2.0 Data block structure - Introduction . 79
8.2.2.1 Unconfirmed data block structure . 79
8.2.2.2 Confirmed data block structure . 82
8.2.2.3 Response packet format . 85
8.2.2.4 Hang time for response packet . 86
8.2.2.5 Unified Data Transport (UDT) last data block structure . 87
9 Layer 2 PDU description . 88
9.0 Layer 2 PDU description - Introduction . 88
9.1 PDUs for voice bursts, general data bursts and the CACH . 88
9.1.1 Synchronization (SYNC) PDU . 88
9.1.2 Embedded signalling (EMB) PDU . 89
9.1.3 Slot Type (SLOT) PDU . 89
9.1.4 TACT PDU . 90
9.1.5 Reverse Channel (RC) PDU . 90
9.1.6 Full Link Control (FULL LC) PDU . 90
9.1.7 Short Link Control (SHORT LC) PDU . 90
9.1.8 Control Signalling Block (CSBK) PDU . 91
9.1.9 Pseudo Random Fill Bit (PR FILL) PDU . 91
9.2 Data related PDU description . 91
9.2.0 Data releated PDU description - Introduction . 91
9.2.1 Confirmed packet Header (C_HEAD) PDU . 91
9.2.2 Rate ¾ coded packet Data (R_3_4_DATA) PDU . 92
9.2.3 Rate ¾ coded Last Data block (R_3_4_LDATA) PDU . 92
9.2.4 Confirmed Response packet Header (C_RHEAD) PDU . 93
9.2.5 Confirmed Response packet Data (C_RDATA) PDU . 93
9.2.6 Unconfirmed data packet Header (U_HEAD) PDU . 93
9.2.7 Rate ½ coded packet Data (R_1_2_DATA) PDU . 94
9.2.8 Rate ½ coded Last Data block (R_1_2_LDATA) PDU . 94
9.2.9 Proprietary Header (P_HEAD) PDU . 95
9.2.10 Status/Precoded short data packet Header (SP_HEAD) PDU . 95
9.2.11 Raw short data packet Header (R_HEAD) PDU . 95
9.2.12 Defined Data short data packet Header (DD_HEAD) PDU . 96
9.2.13 Unified Data Transport Header (UDT_HEAD) PDU . 96
9.2.14 Unified Data Transport Last Data block (UDT_LDATA) PDU . 96
9.2.15 Rate 1 coded packet Data (R_1_DATA) PDU . 97
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9.2.16 Rate 1 coded Last Data block (R_1_LDATA) PDU . 97
9.3 Layer 2 information element coding . 98
9.3.0 Layer 2 information element coding - Introduction . 98
9.3.1 Colour Code (CC) . 98
9.3.2 Pre-emption and power control Indicator (PI) . 98
9.3.3 LC Start/Stop (LCSS) . 98
9.3.4 EMB parity . 99
9.3.5 Feature set ID (FID) . 99
9.3.6 Data Type. 99
9.3.7 Slot Type parity . 99
9.3.8 Access Type (AT) . 100
9.3.9 TDMA Channel (TC). 100
9.3.10 Protect Flag (PF) . 100
9.3.11 Full Link Control Opcode (FLCO) . 100
9.3.12 Short Link Control Opcode (SLCO) . 100
9.3.13 TACT parity. 100
9.3.14 RC parity . 101
9.3.15 Group or Individual (G/I) . 101
9.3.16 Response Requested (A) . 101
9.3.17 Data Packet Format (DPF) . 101
9.3.18 SAP identifier (SAP) . 101
9.3.19 Logical Link ID (LLID) . 102
9.3.20 Full message flag (F) . 102
9.3.21 Blocks to Follow (BF) . 102
9.3.22 Pad Octet Count (POC) . 102
9.3.23 Re-Synchronize Flag (S) . 103
9.3.24 Send sequence number (N(S)) . 103
9.3.25 Fragment Sequence Number (FSN) . 103
9.3.26 Data Block Serial Number (DBSN) . 104
9.3.27 Data block CRC (CRC-9) . 104
9.3.28 Class (Class) . 104
9.3.29 Type (Type) . 105
9.3.30 Status (Status) . 105
9.3.31 Last Block (LB) . 105
9.3.32 Control Signalling BlocK Opcode (CSBKO) . 105
9.3.33 Appended Blocks (AB) . 105
9.3.34 Source Port (SP) . 106
9.3.35 Destination Port (DP). 106
9.3.36 Status/Precoded (S_P). 106
9.3.37 Selective Automatic Repeat reQuest (SARQ) . 106
9.3.38 Defined Data format (DD) . 106
9.3.39 Unified Data Transport Format (UDT Format) . 107
9.3.40 UDT Appended Blocks (UAB) . 108
9.3.41 Supplementary Flag (SF) . 108
9.3.42 Pad Nibble . 108
10 Physical Layer . 108
10.1 General parameters . 108
10.1.0 General parameters - Introduction . 108
10.1.1 Frequency range . 108
10.1.2 RF carrier bandwidth . 108
10.1.3 Transmit frequency error . 108
10.1.4 Time base clock drift error . 109
10.2 Modulation . 109
10.2.1 Symbols . 109
10.2.2 4FSK generation . 109
10.2.2.0 4FSK generation - Introduction. 109
10.2.2.1 Deviation index . 109
10.2.2.2 Square root raised cosine filter . 110
10.2.2.3 4FSK Modulator . 110
10.2.3 Burst timing . 111
10.2.3.0 Burst timing - Introduction . 111
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10.2.3.1 Normal burst . 111
10.2.3.1.0 Normal burst - Introduction . 111
10.2.3.1.1 Power ramp time. 112
10.2.3.1.2 Symbol timing . 113
10.2.3.1.3 Propagation delay and transmission time . 113
10.2.3.2 Reverse channel (RC) burst. 114
10.2.3.2.0 Reverse channel (RC) burst - Introduction . 114
10.2.3.2.1 Power ramp time. 114
10.2.3.2.2 Symbol timing . 115
10.2.3.2.3 Propagation delay . 116
10.2.3.3 Synthesizer Lock-Time constraints . 116
10.2.3.4 Transient frequency constraints during symbol transmission time . 116
Annex A (normative): Numbering and addressing . 117
Annex B (normative): FEC and CRC codes . 118
B.0 FEC and CRC codes - Introduction . 118
B.1 Block Product Turbo Codes . 119
B.1.1 BPTC (196,96) . 119
B.2 Variable length BPTC . 122
B.2.1 Variable length BPTC for embedded signalling . 122
B.2.2 Single Burst Variable length BPTC. 124
B.2.2.1 Non-Reverse Channel Single Burst BPTC . 124
B.2.2.2 Reverse Channel Single Burst BPTC. 125
B.2.3 Variable length BPTC for CACH signalling . 126
B.2.4 Rate ¾ Trellis code . 129
B.2.5 Rate 1 coded data . 133
B.3 Generator matrices and polynomials . 135
B.3.1 Golay (20,8) . 135
B.3.2 Quadratic residue (16,7,6) . 135
B.3.3 Hamming (17,12,3) . 136
B.3.4 Hamming (13,9,3), Hamming (15,11,3), and Hamming (16,11,4) . 136
B.3.5 Hamming (7,4,3) . 137
B.3.6 Reed-Solomon (12,9) . 137
B.3.7 8-bit CRC calculation . 139
B.3.8 CRC-CCITT calculation . 140
B.3.9 32-bit CRC calculation . 140
B.3.10 CRC-9 calculation . 142
B.3.11 5-bit Checksum (CS) calculation .
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