ETSI TS 102 361-4 V1.10.1 (2019-08)

ETSI TS 102 361-4 V1.10.1 (2019-08)






TECHNICAL SPECIFICATION
Electromagnetic compatibility
and Radio spectrum Matters (ERM);
Digital Mobile Radio (DMR) Systems;
Part 4: DMR trunking protocol

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2 ETSI TS 102 361-4 V1.10.1 (2019-08)



Reference
RTS/ERM-TGDMR-374
Keywords
data, digital, MS, radio, signalling, trunking
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3 ETSI TS 102 361-4 V1.10.1 (2019-08)
Contents
Intellectual Property Rights . 14
Foreword . 14
Modal verbs terminology . 14
1 Scope . 15
2 References . 15
2.1 Normative references . 15
2.2 Informative references . 16
3 Definition of terms, symbols and abbreviations . 16
3.1 Terms . 16
3.2 Symbols . 20
3.3 Abbreviations . 20
4 Overview . 23
4.0 Overview introduction . 23
4.1 Protocol architecture. 24
4.1.0 Protocol architecture - Introduction . 24
4.1.1 Air Interface Physical Layer (layer 1). 25
4.1.2 Air Interface Data Link Layer (layer 2) . 25
4.1.3 Air Interface Call Control Layer (layer 3) . 26
4.2 Services and Facilities . 26
4.3 Device Addresses . 28
4.3.1 MS Addresses . 28
4.3.2 Services and Gateway Addresses . 28
4.4 Conventional/Trunked Systems . 28
4.5 MS Location . 28
4.6 Tier III Services . 29
4.6.0 Tier III Services - Introduction . 29
4.6.1 MS initiating calls . 29
4.6.2 MS receiving calls . 29
4.6.2.0 MS receiving calls - Introduction . 29
4.6.2.1 MS receiving individual calls . 30
4.6.2.1.0 MS receiving individual calls - Introduction . 30
4.6.2.1.1 Off Air Call Set-Up (OACSU) . 30
4.6.2.1.2 Full Off Air Call Set-Up (FOACSU). 30
4.6.2.2 MS receiving calls to talkgroups . 30
4.6.2.3 MS receiving calls to All_MS . 30
4.7 Physical Link Organization . 30
4.7.0 Physical Link Organization - Introduction . 30
4.7.1 Radio Frequency Allocation . 30
4.7.2 Colour Code (CC) . 31
4.8 DMR TDMA burst and channel structure . 31
4.9 TS Structure. 32
4.9.0 Introduction to the TS Structure . 32
4.9.1 An individual voice call example . 32
4.9.1.1 Individual Call using OACSU. 32
4.9.1.2 Individual Call using FOACSU . 34
4.9.2 A talkgroup call example . 35
4.10 Network architecture . 36
4.10.0 Network architecture - Introduction . 36
4.10.1 Network functions . 36
4.10.1.0 Network functions - Introduction . 36
4.10.1.1 Establishing service . 36
4.10.1.2 Network Identifier . 36
4.10.2 MS Location by Registration . 37
4.11 Trunking methods. 37
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4 ETSI TS 102 361-4 V1.10.1 (2019-08)
4.11.0 Trunking methods - Introduction . 37
4.11.1 Message trunking . 37
4.11.2 Transmission trunking . 37
4.11.3 Quasi-Transmission trunking . 37
5 Trunking Control Channel Formats . 38
5.0 Trunking Control Channel Formats - Introduction . 38
5.1 The use of the CACH . 38
5.1.0 System Identity Code Structure . 38
5.1.1 C_SYS_Parms and P_SYS Parms - System Identity Code Subset . 39
5.1.2 C_SYS_Parms - Reg . 39
5.1.3 C_SYS_Parms - Common_Slot_Counter . 39
5.2 Tier III signalling. 39
5.3 Modes of control channel . 39
5.3.0 Control channel modes - Introduction . 39
5.3.1 Dedicated TSCC . 40
5.3.2 Non-Dedicated TSCC . 40
5.3.3 Operation in shared spectrum . 40
5.4 CSBK/MBC/UDT/USBD Block Structure . 40
5.4.0 CSBK/MBC/UDT/USBD Block Structure - Introduction . 40
5.4.1 CSBK/MBC/UDT/USBD PDUs on the TSCC outbound channel . 40
5.4.2 CSBK/MBC/UDT/USBD PDUs on the TSCC inbound channel . 42
5.4.3 CSBK/MBC PDUs on the Payload Channel Outbound channel . 42
5.4.4 CSBK PDUs on the Payload Channel Inbound channel . 43
6 Trunking Procedures . 44
6.1 Basic Structure . 44
6.1.1 Channel Structure . 44
6.1.1.1 Fully Regulated Structure . 44
6.1.1.2 Shared Channel Unregulated Structure . 44
6.1.1.3 TSCCAS Structure . 45
6.1.2 Physical Channel Addressing . 45
6.1.3 Sub-Division of the MS population . 45
6.2 Random Access Procedures . 47
6.2.0 Random Access Procedures - Introduction . 47
6.2.1 The Random Access Principle . 47
6.2.1.0 Random Access Principle - Introduction . 47
6.2.1.1 Random Access Control . 47
6.2.1.1.0 Random Access Control - Introduction . 47
6.2.1.1.1 Sub dividing the MS population . 47
6.2.1.1.2 Checking the Service-Function . 48
6.2.1.1.3 Withdrawing slots from Random-Access . 48
6.2.1.1.4 TSCC responses to Random Access attempts . 49
6.2.1.1.5 Noting the response delay. 49
6.2.1.1.6 Random Backoff . 50
6.2.1.1.7 Retry decision and time-outs . 52
6.2.1.1.8 Random Access (non-emergency) SDL for an MS as defined in clause 6.2 . 53
6.2.1.1.9 Random Access (emergency) SDL for an MS as defined in clause 6.2 . 56
6.2.1.2 Action after receiving an acknowledgement . 58
6.2.1.3 MS Arriving on a Control Channel . 59
6.3 Control Channel Acquisition and Retention . 59
6.3.0 Control Channel Acquisition and Retention - Introduction . 59
6.3.1 MS Parameter Volatility . 60
6.3.2 Control Channel Acquisition Procedures . 61
6.3.2.0 Control Channel Acquisition Procedures - Introduction . 61
6.3.2.1 Entry into TSCC Acquisition Procedures . 61
6.3.2.2 Identifying a Candidate Control Channel . 61
6.3.2.2.0 Identifying a Candidate Control Channel - Introduction . 61
6.3.2.2.1 Checking the System Identity Code . 62
6.3.2.2.2 TSCC Authorization Procedure . 64
6.3.2.2.3 Checking the SYS_AREA information element . 65
6.3.2.3 Confirmation - Monitoring the TSCC outbound channel signal quality . 66
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5 ETSI TS 102 361-4 V1.10.1 (2019-08)
6.3.2.4 Reading the Colour Code . 66
6.3.3 MS Leaving a Control Channel . 67
6.3.3.1 Reasons for Leaving a Control Channel when active but idle . 67
6.3.3.2 Leaving a Control Channel Whilst Waiting for Signalling . 67
6.4 Registration, Power Save, and Authentication Procedures . 67
6.4.0 Registration, Power Save, and Auth Procedures - Introduction . 67
6.4.1 Registration . 68
6.4.1.1 Introduction . 68
6.4.1.2 The Principle . 69
6.4.2 MS Parameter Volatility . 70
6.4.3 Action on confirmation of a TSCC . 70
6.4.4 Registration Procedures . 70
6.4.4.0 Registration Procedures - Introduction. 70
6.4.4.1 Registration by Random Access . 71
6.4.4.1.0 Registration by Random Access - Introduction . 71
6.4.4.1.1 Intermediate Acknowledgement . 72
6.4.4.1.2 Registration accepted . 72
6.4.4.1.3 Registration Refused . 72
6.4.4.1.4 Registration Denied . 72
6.4.4.1.5 Challenge and Response Authentication . 72
6.4.4.1.6 Registration Attempt Times Out . 73
6.4.4.1.7 Registration Demand Received During Random Access Registration . 73
6.4.4.1.8 No answer response Received after the maximum number of random access attempts . 73
6.4.4.1.9 Registration Action on Switch-on or equivalent . 73
6.4.4.1.10 Registration scenario MSC . 74
6.4.4.1.11 Registration with MS authentication . 75
6.4.4.1.12 Acceptance of user initiated service requests . 76
6.4.4.1.13 Talkgroup Subscription and Talkgroup Attachment. 76
6.4.5 Mass re-registration . 80
6.4.5.0 Mass re-registration - Introduction . 80
6.4.5.1 Procedure for MS on receipt of Mass Re-registration Broadcast . 80
6.4.6 De-registration . 81
6.4.7 Power Save . 81
6.4.7.1 Overview . 81
6.4.7.2 Power Save Procedures . 82
6.4.7.2.1 Basic Power Save Procedures . 82
6.4.8 Authentication Procedures . 84
6.4.8.0 Authentication Procedures - Introduction . 84
6.4.8.1 Key Management . 84
6.4.8.2 Authentication Procedures for the TSCC to authenticate an MS . 85
6.4.8.3 Authentication Procedures for the MS . 85
6.4.9 MS Stun/Revive . 85
6.4.9.0 MS Stun/Revive - Introduction . 85
6.4.9.1 MS Stun/Revive without authentication. 86
6.4.9.1.0 MS Stun/Revive without authentication - Introduction . 86
6.4.9.1.1 Stun/Revive procedures for the TSCC . 86
6.4.9.1.2 Stun/Revive procedures for the MS . 86
6.4.9.2 MS Stun/Revive with authentication . 87
6.4.9.2.0 MS Stun/Revive with authentication - Introduction . 87
6.4.9.2.1 Stun/Revive procedures with authentication for the TSCC . 87
6.4.9.2.2 Stun/Revive procedures with authentication for the MS . 88
6.4.10 MS Kill . 88
6.4.10.0 MS Kill - Introduction . 88
6.4.10.1 Kill procedures with authentication for the TSCC . 89
6.4.10.2 Kill procedures with authentication for the MS . 90
6.4.11 IP Connection Advice . 91
6.4.11.0 IP Connection Advice - Introduction . 91
6.4.11.1 IP Connection Advice procedures for the MS . 91
6.4.11.1.0 IP Connection Advice procedures for the MS - Introduction . 91
6.4.11.1.1 Registration Attempt Times Out . 92
6.4.11.1.2 No answer response received after the maximum number of random access attempts . 92
6.4.11.1.3 MS response to C_AHOY inviting the MS to send an IP address . 92
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6 ETSI TS 102 361-4 V1.10.1 (2019-08)
6.4.11.1.4 Final acknowledgment to IP connection advice received by the calling MS . 92
6.4.11.2 IP Connection Advice procedures for the TSCC . 92
6.4.11.2.0 IP Connection Advice procedures for the TSCC - Introduction . 92
6.4.11.2.1 IP Bearer Service available at site . 93
6.4.11.2.2 IP Bearer Service not available at site . 93
6.4.11.2.3 Final acknowledgement to IP connection advice . 93
6.4.12 Unsolicited MS Radio Check. 94
6.4.13 Supplementary_User Data Service . 95
6.4.13.0 Supplementary_User Data Service - Introduction . 95
6.4.13.1 Supplementary data Inbound Phase . 95
6.4.13.2 Supplementary Data Outbound Phase . 96
6.4.14 MS Power Control and PTT De-key . 99
6.4.14.0 MS Power Control and PTT De-key - Introduction . 99
6.4.14.1 Reverse Channel . 99
6.4.14.2 Procedures for Power Control .
...