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1 ETSI TS 102 361-1 (2006-01)Technical Specification Electromagnetic compatibilityand radio spectrum Matters (ERM); digital mobile radio (DMR) Systems;Part 1: DMR Air Interface (AI) protocol ETSI ETSI TS 102 361-1 (2006-01) 2 Reference RTS/ERM-TGDMR-057-1 Keywords air interface, digital , PMR, protocol, radio ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistr e la Sous-Pr fecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: The present document may be made available in more than one electronic version or in print.

2 In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at If you find errors in the present document, please send your comment to one of the following services: Copyright Notification No part may be reproduced except as authorized by written permission.

3 The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2006. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3 GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3 GPP Organizational Partners. ETSI ETSI TS 102 361-1 (2006-01) 3 Contents Intellectual Property Rights ..8 1 Scope ..9 2 References ..9 3 Definitions, symbols and abbreviations.

4 10 Definitions ..10 Symbols ..12 Abbreviations ..12 4 Overview ..14 Protocol 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 Frame synchronization ..19 Timing BS timing relationship ..21 Direct mode timing relationship ..21 Common Announcement CHannel (CACH) ..21 Basic channel types ..22 Traffic channel with Traffic channel with guard Bi-directional 5 Layer 2 protocol Layer 2 timing.

5 24 Channel timing relationship ..24 Aligned channel timing ..24 Offset channel timing ..24 Voice timing ..25 Voice superframe ..25 Voice Voice Data timing ..27 Single slot data Dual slot data timing ..27 Traffic BS timing ..28 Single frequency BS timing ..29 Direct mode timing ..29 Time Division Duplex (TDD) Continuous transmission mode.

6 30 Reverse Channel timing ..30 Embedded outbound Reverse Dedicated outbound Reverse Channel ..31 Standalone inbound Reverse Channel ..32 Direct mode Reverse Channel access ..33 Basic channel access rules ..34 Types of channel activity ..34 Channel status ..35 Timing master ..35 ETSI ETSI TS 102 361-1 (2006-01) 4 Hang time messages and timers ..35 Slot 1 and 2 dependency ..36 Transmit admit criteria ..36 Transmission re-tries ..36 Channel access procedure.

7 37 Peer to Peer Mode Channel MS Out_of_Sync Channel MS Out_of_Sync_Channel_Monitored Channel MS In_Sync_Unknown_System Channel Access ..40 MS Not_in_Call Channel Access ..41 MS Others_Call Channel Access ..41 MS My_Call Channel Repeater Mode Channel MS Out_of_Sync Channel MS Out_of_Sync_Channel_Monitored Channel MS In_Sync_Unknown_System Channel Access ..44 MS MS Not_In_Call Channel Access ..46 MS Others_Call Channel Access ..47 MS My_Call Channel MS In_Session Channel Access ..47 Non-time critical CSBK ACK/NACK channel 6 Layer 2 burst format ..48 Vocoder socket.

8 49 Data and control ..50 Common Announcement Channel Reverse Standalone inbound Reverse Channel Outbound reverse channel 7 DMR signalling ..53 Link Control message Voice LC header ..54 Terminator with LC ..55 Embedded Outbound channel ..56 Inbound channel ..57 Short Link Control in CACH ..58 Control Signalling BlocK (CSBK) message Control Signalling BlocK (CSBK) ..60 IDLE Multi Block Control (MBC) message Multi Block Control (MBC).

9 64 8 DMR Packet Data Protocol (PDP) ..65 Internet Protocol ..65 Datagram fragmentation and re-assembly ..66 Header Block structure ..67 Unconfirmed Data Header ..68 Confirmed Data Header ..68 Response Data Header ..69 Proprietary Data Status/precoded short data header ..70 Raw short data header ..70 Defined short data Unified Data Transport (UDT) data Data block structure ..71 Unconfirmed data block structure ..72 Confirmed data block structure ..73 Response packet format ..74 Hang time for Response Unified Data Transport (UDT) last data block structure ..76 ETSI ETSI TS 102 361-1 (2006-01) 5 9 Layer 2 PDU description.

10 76 PDUs for voice bursts, general data bursts and the CACH ..77 Synchronization (SYNC) PDU ..77 Embedded signalling (EMB) PDU ..77 Slot Type (SLOT) PDU ..78 TACT Reverse Channel (RC) PDU ..78 Full Link Control (FULL LC) Short Link Control (SHORT LC) PDU ..79 Control Signalling Block (CSBK) PDU ..79 Pseudo Random Fill Bit (PR FILL) PDU ..79 Data related PDU description ..79 Confirmed packet Header (C_HEAD) PDU ..80 Rate coded packet Data (R_3_4_DATA) PDU ..80 Rate coded Last Data block (R_3_4_LDATA) Confirmed Response packet Header (C_RHEAD) PDU ..81 Confirmed Response packet Data (C_RDATA) PDU.