SIST EN 300 396-4 V1.4.1:2012

Terrestrial Trunked Radio (TETRA) - Technical requirements for Direct Mode Operation (DMO) - Part 4: Type 1 repeater air interface

REN/TETRA-08194

Prizemni snopovni radio (TETRA) - Tehnične zahteve za neposredni način delovanja (DMO) - 4. del: Radijski vmesnik tipa 1 za ponavljalnike (repetitorje)

Večdelni dokument EN 300 396 določa neposredni način delovanja (DMO) prizemnega snopovnega radia (TETRA).
Določa osnovni radijski vmesnik, medsebojno delovanje skupin neposrednega načina (DM) prek ponavljalnikov in medsebojno delovanje s sistemom prizemnega snopovnega radia, ki podpira govor in podatke (V+D), prek prehodov. Poleg osnovnih nosilnih in telekomunikacijskih storitev določa tudi varnostne vidike neposrednega načina delovanja prizemnega snopovnega radia in storitve, ki jih podpira.
Ta del se uporablja za radijski vmesnik za ponavljalnike neposrednega načina delovanja (DM-REP) prizemnega snopovnega radia in vsebuje specifikacije za fizično plast, plast podatkovne povezave (DLL) in omrežno plast v skladu z modelom ISO.
Specifikacije iz tega dokumenta se uporabljajo za ponavljalnik neposrednega načina delovanja kot samostojno enoto za podporo enega klica na radijskem vmesniku (ponavljalnik neposrednega načina delovanja tipa 1). Zadevajo tudi delovanje mobilnih postaj v neposrednem načinu (DM-MS) s ponavljalnikom neposrednega načina delovanja tipa 1.
OPOMBA 1: Specifikacije za skupno izvajanje ponavljalnika/prehoda neposrednega načina (DM-REP/GATE) so skupaj s specifikacijami za prehod neposrednega načina (DM-GATE) navedene v dokumentu EN 300 396-5 [5].
OPOMBA 2: Specifikacije za ponavljalnik neposrednega načina kot samostojno enoto, ki podpira dva klica na radijskem vmesniku (ponavljalnik neposrednega načina tipa 2), so navedene v dokumentu EN 300 396-7 [i.3].
Protokol za mobilno postajo neposrednega načina, ki deluje s ponavljalnikom neposrednega načina tipa 1, je naveden v točkah 5, 8, 10 in 11. Velik del tega protokola je opredeljen v obliki »delta dokumenta«, ki se nanaša na specifikacije za neposredno delovanje od mobilne postaje do mobilne postaje iz dokumentov EN 300 396-2 [2] in EN 300 396-3 [3]. V teh točkah je navedeno, kje se protokol iz dokumentov EN 300 396-2 [2] in EN 300 396-3 [3] uporablja nespremenjen in kje z navedenimi spremembami, zamenjavami ali dodatki.
Kjer sklicevanje na dokument EN 300 396-2 [2] ali EN 300 396-3 [3] ne obstaja, je treba točko obravnavati kot samostojno.
Protokol za ponavljalnik neposrednega načina je določen v točki 9 in 12.
Normativni dodatek v glavnem določa vrednosti parametrov, ki se uporabljajo v protokolu.

General Information

• Status: Published
• Publication Date: 10-Jan-2012
• ICS: 33.070.10 - Terrestrial Trunked Radio (TETRA)
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Jan-2012
• Due Date: 16-Mar-2012
• Completion Date: 11-Jan-2012
• Mandate: BC-T-344
• Ref Project: ETSI EN 300 396-4 V1.4.1 (2011-12) - Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO); Part 4: Type 1 repeater air interface

Overview

SIST EN 300 396-4 V1.4.1:2012 defines technical requirements for the air interface of Type 1 repeaters in Terrestrial Trunked Radio (TETRA) Direct Mode Operation (DMO). TETRA, a globally adopted digital trunked radio standard, is widely used by public safety, emergency response, transport, utilities, and governmental organizations for secure and resilient critical communications. This standard focuses specifically on the protocol specifications and operational procedures required for seamless DMO repeater functionality, ensuring interoperability and robust communication capabilities in the absence of fixed infrastructure.

Key Topics

• Direct Mode Operation (DMO): Provides guidelines for peer-to-peer TETRA communications without network infrastructure, crucial for mission-critical scenarios where base stations are unavailable.
• Type 1 Repeater Air Interface: Specifies the air interface protocols for Type 1 DMO repeaters, allowing radio terminals (DM-MS) to relay signals and extend communication range.
• Layered Protocol Structure: Details services and interactions at Layers 2 and 3, including MAC functions, channel monitoring, message transfer, and error management.
• Channel and Call Procedures: Describes DMO channel structures, call set-up and tear-down, data messaging, pre-emption, and handover requirements for both voice and data services.
• Random Access and Synchronization: Outlines methods for channel access, signaling message transfer, synchronization, and state monitoring for both mobile stations and repeaters.
• Security Provisions: Addresses usage of air interface encryption and management of secure communication in DMO environments.

Applications

Implementing the requirements in SIST EN 300 396-4 V1.4.1:2012 enables a range of practical benefits:

• Emergency Response: Ensures critical communications continue in disaster or remote environments where TETRA network coverage is lacking or has failed.
• Event and Field Deployment: Facilitates reliable voice and data exchange among frontline personnel in temporary or mobile deployments such as public events or search-and-rescue missions.
• Infrastructure Resilience: Provides a fallback communication layer for police, fire, ambulance, and security services, maintaining operational capacity during network outages.
• Extended Coverage: Type 1 DMO repeaters help bridge coverage gaps by relaying calls, improving overall radio network reach and flexibility.
• Inter-agency Interoperability: Standardized protocols ensure that equipment from different manufacturers can communicate seamlessly in DMO using Type 1 repeaters.

Related Standards

SIST EN 300 396-4 V1.4.1:2012 is part of the broader TETRA suite maintained by ETSI and the Slovenski inštitut za standardizacijo (SIST). Key related standards include:

• EN 300 396-1 - General requirements for TETRA DMO
• EN 300 392-2 - Air interface (AI) protocols for TETRA
• EN 300 396-2 - TETRA DMO repeater functional requirements
• ETSI TS 100 392-7 - Security measures for TETRA DMO

Compliance with these standards supports interoperability, security, and seamless integration within critical communications networks. For the most up-to-date documents and TETRA standard status, consult ETSI’s official portal or your local national standards organization.

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Keywords: TETRA, Direct Mode Operation, DMO, Type 1 Repeater, air interface, radio communication, public safety, ETSI standards, emergency communications, protocol specifications, SIST EN 300 396-4 V1.4.1:2012

Standards Content (Sample)

Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)

European Standard
Terrestrial Trunked Radio (TETRA);
Technical requirements for Direct Mode Operation (DMO);
Part 4: Type 1 repeater air interface

2 Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)

Reference
REN/TETRA-08194
Keywords
TETRA, DMO, repeater, protocol, radio, air
interface
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. 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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
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Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2011.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)
Contents
Intellectual Property Rights . 9
Foreword . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 11
3 Definitions and abbreviations . 11
3.1 Definitions . 11
3.2 Abbreviations . 14
4 Overview of protocol. . 15
4.1 General . 15
4.2 The DM channel . 17
4.3 DM call procedures for operation with a type 1 DM-REP . 18
4.3.1 Constraints on the frame structure . 19
4.3.2 Setting up a call . 19
4.3.2.1 Call set-up without presence check . 20
4.3.2.2 Call set-up with presence check . 21
4.3.3 Changeover in a call . 21
4.3.4 Pre-emption of a DM call . 22
4.3.5 Terminating a call . 23
4.3.6 DM short data call . 23
4.3.6.1 Unacknowledged short data message . 23
4.3.6.2 Acknowledged short data message . 24
5 DM-MS layer 3 service description for operation with a type 1 DM-REP . 25
5.1 Introduction . 25
5.2 Services offered . 25
5.3 Primitive description . 25
5.4 Parameter description . 25
5.5 States for DMCC-SAP . 25
6 DM-MS layer 3 protocol for operation with a type 1 DM-REP . 26
6.1 Introduction . 26
6.1.1 DMCC protocol states . 26
6.2 Circuit mode calls . 26
6.2.1 Procedures for call set-up without presence check . 26
6.2.1.1 Outgoing call . 26
6.2.1.2 Incoming call. 27
6.2.1.3 Temporary group address . 27
6.2.2 Procedures for call set-up with presence check . 27
6.2.2.1 Outgoing call . 27
6.2.2.2 Incoming call. 28
6.2.3 Usage of DM-OCCUPIED PDU . 28
6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 28
6.2.3.2 Late entry by slave DM-MS . 28
6.2.4 Procedures during occupation . 28
6.2.4.1 Master DM-MS . 28
6.2.4.2 Slave DM-MS . 29
6.2.4.3 Transmitting Party Number Identification (TPNI) . 29
6.2.5 Procedures during reservation. 29
6.2.5.1 Master DM-MS . 29
6.2.5.2 Slave DM-MS . 29
6.2.5.3 Pre-emption of short data sent as a transaction within a circuit mode call . 29
6.2.6 Procedures to set up a new call by pre-emption . 30
6.3 Short Data Service (SDS) procedures . 30
ETSI
4 Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)
6.3.1 Sending short data . 30
6.3.1.1 Sending short data on a free channel . 30
6.3.1.1.1 Sending unacknowledged short data on a free channel . 30
6.3.1.1.2 Sending acknowledged short data on a free channel . 31
6.3.1.2 Sending short data by pre-emption . 31
6.3.1.3 Sending short data during circuit mode transmission . 31
6.3.1.4 Sending short data as a transaction within a circuit mode call . 31
6.3.2 Receiving short data. 31
6.3.2.1 Receiving unacknowledged short data . 31
6.3.2.2 Receiving acknowledged short data . 31
6.3.3 Additional addressing . 31
6.3.4 Extended error protection . 31
6.3.5 SDS-TL service in DMO . 32
6.4 Usage of DMA-UNITDATA primitive . 32
6.5 General procedures . 32
6.5.1 Usage restriction type and validity time . 32
7 DM-MS layer 2 service description for operation with a type 1 DM-REP . 32
7.1 Introduction . 32
7.2 Layer 2 architecture . 33
7.3 Service descriptions . 33
7.3.1 Services at the DMA-SAP . 33
7.3.1.1 Services provided to layer 3 . 33
7.3.1.2 Service primitives at the DMA-SAP . 34
7.3.2 Services at the DMC-SAP . 34
7.3.2.1 Services provided to layer 3 . 34
7.3.2.2 Service primitives at the DMC-SAP . 34
7.3.2.2.1 DMC-CONFIGURE primitive . 34
7.3.2.2.2 DMC-REPORT primitive . 34
7.3.3 Services at the DMD-SAP . 34
7.3.3.1 Services provided to the U-plane application . 34
7.3.3.2 Service primitives at the DMD-SAP . 34
7.4 Parameter listing . 34
8 DM-MS layer 2 protocol for operation with a type 1 DM-REP . 35
8.1 Introduction . 35
8.1.1 Functions of lower MAC . 35
8.1.2 Functions of upper MAC . 35
8.2 Interface between lower and upper MAC . 35
8.2.1 Logical channels defined at the DMV-SAP . 35
8.2.2 Service primitives at the DMV-SAP . 35
8.2.3 PDU mapping of the logical channels at the DMV-SAP . 36
8.2.4 Scrambling mechanism . 36
8.2.5 PDU error detection . 36
8.2.6 Modes of operation . 36
8.3 Basic capabilities of the physical layer. 37
8.3.1 DM-MS capabilitie s . 37
8.3.1.1 DM only and dual mode capable MS operation . 37
8.3.1.2 Dual watch capable MS operation . 37
8.3.1.2.1 Full Dual Watch Mobile Station (F-DW-MS) . 37
8.3.1.2.2 Idle Dual Watch Mobile Station (I-DW-MS) . 37
8.4 Usage of DM channel with type 1 DM-REP . 38
8.4.1 Definition of DM channel . 38
8.4.1.1 DM channel arrangement . 38
8.4.1.2 DM channel operation . 38
8.4.2 DM-MAC states . 39
8.4.2.1 DM-MAC state definitions . 39
8.4.2.2 DM-MS channel surveillance procedures . 40
8.4.2.2.1 Initial determination of DM channel state . 40
8.4.2.2.2 Fast call set-up surveillance in idle mode . 40
8.4.2.2.3 DM-MS channel surveillance at call set-up . 40
8.4.2.3 Master DM-MS channel maintenance procedures during a call . 41
ETSI
5 Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)
8.4.2.4 Slave DM-MS channel maintenance procedures during a call . 41
8.4.2.4.1 Slave MS channel maintenance during call transaction . 41
8.4.2.4.2 Slave MS signal quality measurement during call transaction . 41
8.4.2.4.3 Slave MS channel maintenance during reservation . 42
8.4.3 Criteria for changing DM-MAC state . 42
8.4.3.1 Criteria for changing DM-MAC state for master DM-MS . 42
8.4.3.2 Criteria for changing DM-MAC state for slave DM-MS . 42
8.4.3.3 Criteria for changing DM-MAC state for idle DM-MS . 42
8.4.4 DM-MS channel monitoring procedures . 42
8.4.4.1 DM channel during initial call set-up and new call transaction by current master MS . 43
8.4.4.2 DM channel during call set-up with presence check . 43
8.4.4.3 DM channel in occupation during a circuit mode call. 43
8.4.4.4 DM channel in reservation during a circuit mode call . 43
8.4.4.5 DM channel in occupation during an SDS call . 44
8.4.4.6 DM channel usage during pre-emption signalling . 44
8.4.4.7 DM channel usage during timing change request signalling . 44
8.4.5 Transmission of layer 3 messages by DM-MAC . 44
8.4.5.1 Transmission of C-plane messages by DM-MAC. 44
8.4.5.2 Transmission of U-plane messages by DM-MAC . 45
8.4.6 Transmission of layer 2 messages generated by DM-MAC . 45
8.4.7 General DM-MAC procedures . 45
8.4.7.1 DM-MAC repeat transmissions . 45
8.4.7.2 DM-MAC frame countdown procedure . 45
8.4.7.3 Use of timers . 45
8.4.7.4 Linearization . 46
8.4.7.5 Fragmentation . 46
8.4.7.6 Fill bit indication . 47
8.4.7.7 Selection of pseudo address . 47
8.4.7.8 Slot flag indication . 47
8.4.7.9 Requests bitmap . 47
8.4.7.10 DM aspects of dual watch operation . 47
8.4.7.10.1 Full and idle dual watch operation. 47
8.4.7.10.2 DM aspects of full dual watch operation . 47
8.4.7.10.3 DM aspects of idle dual watch operation . 48
8.4.7.11 Air interface encryption . 48
8.4.7.12 Channel A or B operation . 48
8.4.7.13 Sending short data as a transaction within a circuit mode call . 48
8.4.7.14 SDS time remaining . 49
8.4.7.15 Timing change procedure . 49
8.4.7.16 Timing change at changeover or pre-emption . 49
8.5 MAC procedures for transfer of signalling messages . 49
8.5.1 Formation of MAC PDU . 49
8.5.2 Addressing . 49
8.5.2.1 Transmission of message . 50
8.5.2.1.1 Addressing in synchronization burst . 50
8.5.2.1.2 Addressing in normal burst. 50
8.5.2.2 Reception of message . 50
8.5.3 Use of air interface encryption . 51
8.5.4 Fragmentation and reconstruction . 51
8.5.4.1 Fragmentation . 51
8.5.4.2 Reconstruction . 52
8.5.5 Fill bit addition and deletion . 53
8.5.6 Transmission and reception of messages by layer 2 . 53
8.5.6.1 Transmission of message . 54
8.5.6.2 Reception of message . 54
8.5.7 Random access protocol . 56
8.5.7.1 Introduction . 56
8.5.7.2 Procedures for master DM-MS . 56
8.5.7.2.1 Indicating frames available for requests . 56
8.5.7.2.2 Monitoring frames available for requests . 56
8.5.7.2.3 Response to pre-emption or changeover request . 57
8.5.7.2.4 Response to timing change request. 57
ETSI
6 Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)
8.5.7.3 Procedures for requesting DM-MS . 57
8.5.7.3.1 Preparing for random access . 58
8.5.7.3.2 First transmission of request . 58
8.5.7.3.3 Valid access slots . 58
8.5.7.3.4 Waiting for response . 58
8.5.7.3.5 Subsequent transmission of request . 59
8.5.7.3.6 Abandoning random access attempt . 59
8.6 MAC procedures in traffic mode . 59
8.6.1 Introduction. 59
8.6.2 Criteria for transmission and reception of traffic . 59
8.6.3 Change of U-plane mode . 60
8.6.3.1 Call set-up without presence check . 60
8.6.3.1.1 Outgoing call . 60
8.6.3.1.2 Incoming call . 60
8.6.3.2 Call set-up with presence check . 60
8.6.3.2.1 Outgoing call . 60
8.6.3.2.2 Incoming call . 61
8.6.3.3 Late entry . 61
8.6.3.4 End of traffic transmission . 61
8.6.3.4.1 Master DM-MS . 61
8.6.3.4.2 Slave DM-MS . 61
8.6.4 Exchange of information at the DMD-SAP . 61
8.6.5 Stealing from circuit mode capacity . 61
9 DM-REP layer 2 protocol for a type 1 DM-REP . 61
9.1 Introduction . 61
9.1.1 Functions of lower MAC . 62
9.1.2 Functions of upper MAC . 62
9.2 Interface between lower and upper MAC . 62
9.3 Basic capabilities of the DM-REP physical layer . 63
9.4 Usage of DM channel . 63
9.4.1 DM-REP operation . 63
9.4.1.1 Channel structure . 63
9.4.1.2 Channel synchronization . 63
9.4.2 DM-REP states . 64
9.4.2.1 DM-REP state definitions . 64
9.4.2.2 DM-REP channel surveillance procedures . 65
9.4.2.2.1 DM-REP channel surveillance when idle on a channel in unknown or free state (i.e. in state 0
or 1) . 65
9.4.2.2.2 DM-REP channel surveillance when idle on a busy channel (i.e. in state 2). 65
9.4.2.2.3 DM-REP channel surveillance when idle at DM-MS call set-up . 66
9.4.2.3 DM-REP channel maintenance when active during a call . 66
9.4.3 Criteria for changing DM-REP state . 67
9.4.3.1 Criteria for changing DM-REP state for active DM-REP . 67
9.4.3.2 Criteria for changing DM-REP state for idle DM-REP . 67
9.4.4 DM-REP channel monitoring procedures . 68
9.4.4.1 DM channel during call set-up with presence check . 69
9.4.4.2 DM channel in occupation during a circuit mode call. 69
9.4.4.3 DM channel in reservation during a circuit mode call . 69
9.4.4.4 DM channel in occupation during an SDS call . 70
9.4.4.5 DM channel following pre-emption or changeover acceptance . 70
9.4.4.6 DM channel following timing change announcement . 71
9.4.5 DM-REP presence signal . 71
9.4.5.1 Channel free . 71
9.4.5.2 Channel in occupation . 72
9.4.5.3 Channel in reservation . 72
9.4.6 DM-REP linearization . 73
9.5 DM-REP procedures for re-transmission of signalling messages . 73
9.5.1 Re-transmission of signalling messages received from the master DM-MS . 74
9.5.1.1 Re-transmission of master DM-MS signalling messages received in a DSB . 74
9.5.1.1.1 General procedures . 74
9.5.1.1.2 Re-transmission of DM-SETUP or DM-SETUP PRES message . 75
ETSI
7 Final draft ETSI EN 300 396-4 V1.4.0 (2011-08)
9.5.1.1.3 Re-transmission of DM-SDS DATA or DM-SDS UDATA message . 75
9.5.1.1.4 Re-transmission of other messages in a DSB when not using multi-slot regeneration . 76
9.5.1.1.5 Re-transmission of other messages in a DSB during traffic transmission with multi-slot
regeneration . 76
9.5.1.2 Re-transmission of master DM-MS signalling messages received in a DNB . 77
9.5.1.2.1 Call transaction without multi-slot regeneration . 77
9.5.1.2.2 Call transaction with multi-slot regeneration . 77
9.5.1.3 Regeneration of missing repetitions on the slave link . 78
9.5.2 Re-transmission of signalling messages received from a slave DM-MS . 78
9.5.2.1 General procedures. 78
9.5.2.2 Re-transmission of response messages from a slave DM-MS. 79
9.5.2.3 Re-transmission of random access request . 79
9.5.3 DM-REP signalling mechanisms . 80
9.5.3.1 Frame countdown procedure . 80
9.5.3.2 Fill bit addition and deletion . 80
9.5.3.3 Null PDU . 80
9.5.3.4 Air interface encryption . 80
9.5.3.5 Timing change procedure . 81
9.5.3.6 Random access procedures for DM-REP . 81
9.6 DM-REP procedures in traffic mode . 81
9.6.1 Introduction. 81
9.6.2 Change of U-plane mode . 81
9.6.2.1 Set-up without presence check . 81
9.6.2.1.1 Switching into traffic mode . 81
9.6.2.1.2 Link establishment failure . 82
9.6.2.2 Set-up with presence check . 82
9.6.2.3 End of traffic transmission . 82
9.6.3 DM-REP traffic operation when active in traffic mode . 83
9.6.3.1 Reception of TCH and STCH on the master link . 83
9.6.3.2 Re-transmission of TCH and STCH on the slave link. 83
9.6.3.2.1 Call transaction without multi-slot regeneration . 84
9.6.3.2.2 Call transaction with multi-slot regeneration . 84
10 PDU descriptions . 85
10.1 Layer 2 PDUs sent in DSB . 85
10.1.1 DMAC-SYNC PDU . 85
10.1.2 DPRES-SYNC PDU . 86
10.2 Layer 2 PDUs sent in DNB . 87
10.3 Layer 2 information element coding . 87
10.3.1 Addressing for URT = 0010 or 1000 . 88
2 2
10.3.2 Addressing for URT = 0011 or 1001 . 88
2 2
10.3.3 Addressing for URT = 0100 or 0101 . 88
2 2
10.3.4 Addressing for URT = 0110 . 88
10.3.4A Addressing for URT = 1010 . 88
10.3.4B Addressing for URT = 1011 . 89
10.3.5
...

European Standard
Terrestrial Trunked Radio (TETRA);
Technical requirements for Direct Mode Operation (DMO);
Part 4: Type 1 repeater air interface

2 ETSI EN 300 396-4 V1.4.1 (2011-12)

Reference
REN/TETRA-08194
Keywords
TETRA, DMO, repeater, protocol, radio, air
interface
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. 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
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2011.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 396-4 V1.4.1 (2011-12)
Contents
Intellectual Property Rights . 9
Foreword . 9
1 Scope . 10
2 References . 10
2.1 Normative references . 10
2.2 Informative references . 11
3 Definitions and abbreviations . 11
3.1 Definitions . 11
3.2 Abbreviations . 14
4 Overview of protocol. . 15
4.1 General . 15
4.2 The DM channel . 17
4.3 DM call procedures for operation with a type 1 DM-REP . 18
4.3.1 Constraints on the frame structure . 19
4.3.2 Setting up a call . 19
4.3.2.1 Call set-up without presence check . 20
4.3.2.2 Call set-up with presence check . 21
4.3.3 Changeover in a call . 21
4.3.4 Pre-emption of a DM call . 22
4.3.5 Terminating a call . 23
4.3.6 DM short data call . 23
4.3.6.1 Unacknowledged short data message . 23
4.3.6.2 Acknowledged short data message . 24
5 DM-MS layer 3 service description for operation with a type 1 DM-REP . 25
5.1 Introduction . 25
5.2 Services offered . 25
5.3 Primitive description . 25
5.4 Parameter description . 25
5.5 States for DMCC-SAP . 25
6 DM-MS layer 3 protocol for operation with a type 1 DM-REP . 26
6.1 Introduction . 26
6.1.1 DMCC protocol states . 26
6.2 Circuit mode calls . 26
6.2.1 Procedures for call set-up without presence check . 26
6.2.1.1 Outgoing call . 26
6.2.1.2 Incoming call. 27
6.2.1.3 Temporary group address . 27
6.2.2 Procedures for call set-up with presence check . 27
6.2.2.1 Outgoing call . 27
6.2.2.2 Incoming call. 28
6.2.3 Usage of DM-OCCUPIED PDU . 28
6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 28
6.2.3.2 Late entry by slave DM-MS . 28
6.2.4 Procedures during occupation . 28
6.2.4.1 Master DM-MS . 28
6.2.4.2 Slave DM-MS . 29
6.2.4.3 Transmitting Party Number Identification (TPNI) . 29
6.2.5 Procedures during reservation. 29
6.2.5.1 Master DM-MS . 29
6.2.5.2 Slave DM-MS . 29
6.2.5.3 Pre-emption of short data sent as a transaction within a circuit mode call . 29
6.2.6 Procedures to set up a new call by pre-emption . 30
6.3 Short Data Service (SDS) procedures . 30
ETSI
4 ETSI EN 300 396-4 V1.4.1 (2011-12)
6.3.1 Sending short data . 30
6.3.1.1 Sending short data on a free channel . 30
6.3.1.1.1 Sending unacknowledged short data on a free channel . 30
6.3.1.1.2 Sending acknowledged short data on a free channel . 31
6.3.1.2 Sending short data by pre-emption . 31
6.3.1.3 Sending short data during circuit mode transmission . 31
6.3.1.4 Sending short data as a transaction within a circuit mode call . 31
6.3.2 Receiving short data. 31
6.3.2.1 Receiving unacknowledged short data . 31
6.3.2.2 Receiving acknowledged short data . 31
6.3.3 Additional addressing . 31
6.3.4 Extended error protection . 31
6.3.5 SDS-TL service in DMO . 32
6.4 Usage of DMA-UNITDATA primitive . 32
6.5 General procedures . 32
6.5.1 Usage restriction type and validity time . 32
7 DM-MS layer 2 service description for operation with a type 1 DM-REP . 32
7.1 Introduction . 32
7.2 Layer 2 architecture . 33
7.3 Service descriptions . 33
7.3.1 Services at the DMA-SAP . 33
7.3.1.1 Services provided to layer 3 . 33
7.3.1.2 Service primitives at the DMA-SAP . 34
7.3.2 Services at the DMC-SAP . 34
7.3.2.1 Services provided to layer 3 . 34
7.3.2.2 Service primitives at the DMC-SAP . 34
7.3.2.2.1 DMC-CONFIGURE primitive . 34
7.3.2.2.2 DMC-REPORT primitive . 34
7.3.3 Services at the DMD-SAP . 34
7.3.3.1 Services provided to the U-plane application . 34
7.3.3.2 Service primitives at the DMD-SAP . 34
7.4 Parameter listing . 34
8 DM-MS layer 2 protocol for operation with a type 1 DM-REP . 35
8.1 Introduction . 35
8.1.1 Functions of lower MAC . 35
8.1.2 Functions of upper MAC . 35
8.2 Interface between lower and upper MAC . 35
8.2.1 Logical channels defined at the DMV-SAP . 35
8.2.2 Service primitives at the DMV-SAP . 35
8.2.3 PDU mapping of the logical channels at the DMV-SAP . 36
8.2.4 Scrambling mechanism . 36
8.2.5 PDU error detection . 36
8.2.6 Modes of operation . 36
8.3 Basic capabilities of the physical layer. 37
8.3.1 DM-MS capabilitie s . 37
8.3.1.1 DM only and dual mode capable MS operation . 37
8.3.1.2 Dual watch capable MS operation . 37
8.3.1.2.1 Full Dual Watch Mobile Station (F-DW-MS) . 37
8.3.1.2.2 Idle Dual Watch Mobile Station (I-DW-MS) . 37
8.4 Usage of DM channel with type 1 DM-REP . 38
8.4.1 Definition of DM channel . 38
8.4.1.1 DM channel arrangement . 38
8.4.1.2 DM channel operation . 38
8.4.2 DM-MAC states . 39
8.4.2.1 DM-MAC state definitions . 39
8.4.2.2 DM-MS channel surveillance procedures . 40
8.4.2.2.1 Initial determination of DM channel state . 40
8.4.2.2.2 Fast call set-up surveillance in idle mode . 40
8.4.2.2.3 DM-MS channel surveillance at call set-up . 40
8.4.2.3 Master DM-MS channel maintenance procedures during a call . 41
ETSI
5 ETSI EN 300 396-4 V1.4.1 (2011-12)
8.4.2.4 Slave DM-MS channel maintenance procedures during a call . 41
8.4.2.4.1 Slave MS channel maintenance during call transaction . 41
8.4.2.4.2 Slave MS signal quality measurement during call transaction . 41
8.4.2.4.3 Slave MS channel maintenance during reservation . 42
8.4.3 Criteria for changing DM-MAC state . 42
8.4.3.1 Criteria for changing DM-MAC state for master DM-MS . 42
8.4.3.2 Criteria for changing DM-MAC state for slave DM-MS . 42
8.4.3.3 Criteria for changing DM-MAC state for idle DM-MS . 42
8.4.4 DM-MS channel monitoring procedures . 42
8.4.4.1 DM channel during initial call set-up and new call transaction by current master MS . 43
8.4.4.2 DM channel during call set-up with presence check . 43
8.4.4.3 DM channel in occupation during a circuit mode call. 43
8.4.4.4 DM channel in reservation during a circuit mode call . 43
8.4.4.5 DM channel in occupation during an SDS call . 44
8.4.4.6 DM channel usage during pre-emption signalling . 44
8.4.4.7 DM channel usage during timing change request signalling . 44
8.4.5 Transmission of layer 3 messages by DM-MAC . 44
8.4.5.1 Transmission of C-plane messages by DM-MAC. 44
8.4.5.2 Transmission of U-plane messages by DM-MAC . 45
8.4.6 Transmission of layer 2 messages generated by DM-MAC . 45
8.4.7 General DM-MAC procedures . 45
8.4.7.1 DM-MAC repeat transmissions . 45
8.4.7.2 DM-MAC frame countdown procedure . 45
8.4.7.3 Use of timers . 45
8.4.7.4 Linearization . 46
8.4.7.5 Fragmentation . 46
8.4.7.6 Fill bit indication . 47
8.4.7.7 Selection of pseudo address . 47
8.4.7.8 Slot flag indication . 47
8.4.7.9 Requests bitmap . 47
8.4.7.10 DM aspects of dual watch operation . 47
8.4.7.10.1 Full and idle dual watch operation. 47
8.4.7.10.2 DM aspects of full dual watch operation . 47
8.4.7.10.3 DM aspects of idle dual watch operation . 48
8.4.7.11 Air interface encryption . 48
8.4.7.12 Channel A or B operation . 48
8.4.7.13 Sending short data as a transaction within a circuit mode call . 48
8.4.7.14 SDS time remaining . 49
8.4.7.15 Timing change procedure . 49
8.4.7.16 Timing change at changeover or pre-emption . 49
8.5 MAC procedures for transfer of signalling messages . 49
8.5.1 Formation of MAC PDU . 49
8.5.2 Addressing . 49
8.5.2.1 Transmission of message . 50
8.5.2.1.1 Addressing in synchronization burst . 50
8.5.2.1.2 Addressing in normal burst. 50
8.5.2.2 Reception of message . 50
8.5.3 Use of air interface encryption . 51
8.5.4 Fragmentation and reconstruction . 51
8.5.4.1 Fragmentation . 51
8.5.4.2 Reconstruction . 52
8.5.5 Fill bit addition and deletion . 53
8.5.6 Transmission and reception of messages by layer 2 . 53
8.5.6.1 Transmission of message . 54
8.5.6.2 Reception of message . 54
8.5.7 Random access protocol . 56
8.5.7.1 Introduction . 56
8.5.7.2 Procedures for master DM-MS . 56
8.5.7.2.1 Indicating frames available for requests . 56
8.5.7.2.2 Monitoring frames available for requests . 57
8.5.7.2.3 Response to pre-emption or changeover request . 57
8.5.7.2.4 Response to timing change request. 57
ETSI
6 ETSI EN 300 396-4 V1.4.1 (2011-12)
8.5.7.3 Procedures for requesting DM-MS . 58
8.5.7.3.1 Preparing for random access . 58
8.5.7.3.2 First transmission of request . 58
8.5.7.3.3 Valid access slots . 58
8.5.7.3.4 Waiting for response . 59
8.5.7.3.5 Subsequent transmission of request . 59
8.5.7.3.6 Abandoning random access attempt . 59
8.6 MAC procedures in traffic mode . 59
8.6.1 Introduction. 59
8.6.2 Criteria for transmission and reception of traffic . 59
8.6.3 Change of U-plane mode . 60
8.6.3.1 Call set-up without presence check . 60
8.6.3.1.1 Outgoing call . 60
8.6.3.1.2 Incoming call . 60
8.6.3.2 Call set-up with presence check . 60
8.6.3.2.1 Outgoing call . 60
8.6.3.2.2 Incoming call . 61
8.6.3.3 Late entry . 61
8.6.3.4 End of traffic transmission . 61
8.6.3.4.1 Master DM-MS . 61
8.6.3.4.2 Slave DM-MS . 61
8.6.4 Exchange of information at the DMD-SAP . 61
8.6.5 Stealing from circuit mode capacity . 61
9 DM-REP layer 2 protocol for a type 1 DM-REP . 61
9.1 Introduction . 61
9.1.1 Functions of lower MAC . 62
9.1.2 Functions of upper MAC . 62
9.2 Interface between lower and upper MAC . 62
9.3 Basic capabilities of the DM-REP physical layer . 63
9.4 Usage of DM channel . 63
9.4.1 DM-REP operation . 63
9.4.1.1 Channel structure . 63
9.4.1.2 Channel synchronization . 64
9.4.2 DM-REP states . 64
9.4.2.1 DM-REP state definitions . 64
9.4.2.2 DM-REP channel surveillance procedures . 65
9.4.2.2.1 DM-REP channel surveillance when idle on a channel in unknown or free state (i.e. in state 0
or 1) . 65
9.4.2.2.2 DM-REP channel surveillance when idle on a busy channel (i.e. in state 2). 65
9.4.2.2.3 DM-REP channel surveillance when idle at DM-MS call set-up . 66
9.4.2.3 DM-REP channel maintenance when active during a call . 66
9.4.3 Criteria for changing DM-REP state . 67
9.4.3.1 Criteria for changing DM-REP state for active DM-REP . 67
9.4.3.2 Criteria for changing DM-REP state for idle DM-REP . 67
9.4.4 DM-REP channel monitoring procedures . 68
9.4.4.1 DM channel during call set-up with presence check . 69
9.4.4.2 DM channel in occupation during a circuit mode call. 69
9.4.4.3 DM channel in reservation during a circuit mode call . 69
9.4.4.4 DM channel in occupation during an SDS call . 70
9.4.4.5 DM channel following pre-emption or changeover acceptance . 70
9.4.4.6 DM channel following timing change announcement . 71
9.4.5 DM-REP presence signal . 71
9.4.5.1 Channel free . 71
9.4.5.2 Channel in occupation . 72
9.4.5.3 Channel in reservation . 73
9.4.6 DM-REP linearization . 73
9.5 DM-REP procedures for re-transmission of signalling messages . 74
9.5.1 Re-transmission of signalling messages received from the master DM-MS . 74
9.5.1.1 Re-transmission of master DM-MS signalling messages received in a DSB . 74
9.5.1.1.1 General procedures . 74
9.5.1.1.2 Re-transmission of DM-SETUP or DM-SETUP PRES message . 75
ETSI
7 ETSI EN 300 396-4 V1.4.1 (2011-12)
9.5.1.1.3 Re-transmission of DM-SDS DATA or DM-SDS UDATA message . 75
9.5.1.1.4 Re-transmission of other messages in a DSB when not using multi-slot regeneration . 76
9.5.1.1.5 Re-transmission of other messages in a DSB during traffic transmission with multi-slot
regeneration . 76
9.5.1.2 Re-transmission of master DM-MS signalling messages received in a DNB . 77
9.5.1.2.1 Call transaction without multi-slot regeneration . 77
9.5.1.2.2 Call transaction with multi-slot regeneration . 77
9.5.1.3 Regeneration of missing repetitions on the slave link . 78
9.5.2 Re-transmission of signalling messages received from a slave DM-MS . 78
9.5.2.1 General procedures. 78
9.5.2.2 Re-transmission of response messages from a slave DM-MS. 79
9.5.2.3 Re-transmission of random access request . 79
9.5.3 DM-REP signalling mechanisms . 80
9.5.3.1 Frame countdown procedure . 80
9.5.3.2 Fill bit addition and deletion . 80
9.5.3.3 Null PDU . 80
9.5.3.4 Air interface encryption . 80
9.5.3.5 Timing change procedure . 81
9.5.3.6 Random access procedures for DM-REP . 81
9.6 DM-REP procedures in traffic mode . 81
9.6.1 Introduction. 81
9.6.2 Change of U-plane mode . 82
9.6.2.1 Set-up without presence check . 82
9.6.2.1.1 Switching into traffic mode . 82
9.6.2.1.2 Link establishment failure . 82
9.6.2.2 Set-up with presence check . 82
9.6.2.3 End of traffic transmission . 83
9.6.3 DM-REP traffic operation when active in traffic mode . 83
9.6.3.1 Reception of TCH and STCH on the master link . 83
9.6.3.2 Re-transmission of TCH and STCH on the slave link. 84
9.6.3.2.1 Call transaction without multi-slot regeneration . 84
9.6.3.2.2 Call transaction with multi-slot regeneration . 84
10 PDU descriptions . 85
10.1 Layer 2 PDUs sent in DSB . 85
10.1.1 DMAC-SYNC PDU . 85
10.1.2 DPRES-SYNC PDU . 86
10.2 Layer 2 PDUs sent in DNB . 87
10.3 Layer 2 information element coding . 87
10.3.1 Addressing for URT = 0010 or 1000 . 88
2 2
10.3.2 Addressing for URT = 0011 or 1001 . 88
2 2
10.3.3 Addressing for URT = 0100 or 0101 . 88
2 2
10.3.4 Addressing for URT = 0110 . 88
10.3.4A Addressing for URT = 1010 . 88
10.3.4B Addressing for URT = 1011 . 89
10.3.5 Channel state .
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QDþLQTerrestrial Trunked Radio (TETRA) - Technical requirements for Direct Mode Operation (DMO) - Part 4: Type 1 repeater air interface33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 396-4 Version 1.4.1SIST EN 300 396-4 V1.4.1:2012en01-februar-2012SIST EN 300 396-4 V1.4.1:2012SLOVENSKI
STANDARD
European Standard SIST EN 300 396-4 V1.4.1:2012

ETSI ETSI EN 300 396-4 V1.4.1 (2011-12) 2
Reference REN/TETRA-08194 Keywords TETRA, DMO, repeater, protocol, radio, air interface ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: [phone]
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© European Telecommunications Standards Institute 2011. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 300 396-4 V1.4.1:2012

ETSI ETSI EN 300 396-4 V1.4.1 (2011-12) 3 Contents Intellectual Property Rights . 9 Foreword . 9 1 Scope . 10 2 References . 10 2.1 Normative references . 10 2.2 Informative references . 11 3 Definitions and abbreviations . 11 3.1 Definitions . 11 3.2 Abbreviations . 14 4 Overview of protocol. 15 4.1 General . 15 4.2 The DM channel . 17 4.3 DM call procedures for operation with a type 1 DM-REP . 18 4.3.1 Constraints on the frame structure . 19 4.3.2 Setting up a call . 19 4.3.2.1 Call set-up without presence check . 20 4.3.2.2 Call set-up with presence check . 21 4.3.3 Changeover in a call . 21 4.3.4 Pre-emption of a DM call . 22 4.3.5 Terminating a call . 23 4.3.6 DM short data call . 23 4.3.6.1 Unacknowledged short data message . 23 4.3.6.2 Acknowledged short data message . 24 5 DM-MS layer 3 service description for operation with a type 1 DM-REP . 25 5.1 Introduction . 25 5.2 Services offered . 25 5.3 Primitive description . 25 5.4 Parameter description . 25 5.5 States for DMCC-SAP . 25 6 DM-MS layer 3 protocol for operation with a type 1 DM-REP . 26 6.1 Introduction . 26 6.1.1 DMCC protocol states . 26 6.2 Circuit mode calls . 26 6.2.1 Procedures for call set-up without presence check . 26 6.2.1.1 Outgoing call . 26 6.2.1.2 Incoming call. 27 6.2.1.3 Temporary group address . 27 6.2.2 Procedures for call set-up with presence check . 27 6.2.2.1 Outgoing call . 27 6.2.2.2 Incoming call. 28 6.2.3 Usage of DM-OCCUPIED PDU . 28 6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 28 6.2.3.2 Late entry by slave DM-MS . 28 6.2.4 Procedures during occupation . 28 6.2.4.1 Master DM-MS . 28 6.2.4.2 Slave DM-MS . 29 6.2.4.3 Transmitting Party Number Identification (TPNI) . 29 6.2.5 Procedures during reservation. 29 6.2.5.1 Master DM-MS . 29 6.2.5.2 Slave DM-MS . 29 6.2.5.3 Pre-emption of short data sent as a transaction within a circuit mode call . 29 6.2.6 Procedures to set up a new call by pre-emption . 30 6.3 Short Data Service (SDS) procedures . 30 SIST EN 300 396-4 V1.4.1:2012

ETSI ETSI EN 300 396-4 V1.4.1 (2011-12) 4 6.3.1 Sending short data . 30 6.3.1.1 Sending short data on a free channel . 30 6.3.1.1.1 Sending unacknowledged short data on a free channel . 30 6.3.1.1.2 Sending acknowledged short data on a free channel . 31 6.3.1.2 Sending short data by pre-emption . 31 6.3.1.3 Sending short data during circuit mode transmission . 31 6.3.1.4 Sending short data as a transaction within a circuit mode call . 31 6.3.2 Receiving short data. 31 6.3.2.1 Receiving unacknowledged short data . 31 6.3.2.2 Receiving acknowledged short data . 31 6.3.3 Additional addressing . 31 6.3.4 Extended error protection . 31 6.3.5 SDS-TL service in DMO . 32 6.4 Usage of DMA-UNITDATA primitive . 32 6.5 General procedures . 32 6.5.1 Usage restriction type and validity time . 32 7 DM-MS layer 2 service description for operation with a type 1 DM-REP . 32 7.1 Introduction . 32 7.2 Layer 2 architecture . 33 7.3 Service descriptions . 33 7.3.1 Services at the DMA-SAP . 33 7.3.1.1 Services provided to layer 3 . 33 7.3.1.2 Service primitives at the DMA-SAP . 34 7.3.2 Services at the DMC-SAP . 34 7.3.2.1 Services provided to layer 3 . 34 7.3.2.2 Service primitives at the DMC-SAP . 34 7.3.2.2.1 DMC-CONFIGURE primitive . 34 7.3.2.2.2 DMC-REPORT primitive . 34 7.3.3 Services at the DMD-SAP . 34 7.3.3.1 Services provided to the U-plane application . 34 7.3.3.2 Service primitives at the DMD-SAP . 34 7.4 Parameter listing . 34 8 DM-MS layer 2 protocol for operation with a type 1 DM-REP . 35 8.1 Introduction . 35 8.1.1 Functions of lower MAC . 35 8.1.2 Functions of upper MAC . 35 8.2 Interface between lower and upper MAC . 35 8.2.1 Logical channels defined at the DMV-SAP . 35 8.2.2 Service primitives at the DMV-SAP . 35 8.2.3 PDU mapping of the logical channels at the DMV-SAP . 36 8.2.4 Scrambling mechanism . 36 8.2.5 PDU error detection . 36 8.2.6 Modes of operation . 36 8.3 Basic capabilities of the physical layer. 37 8.3.1 DM-MS capabilities . 37 8.3.1.1 DM only and dual mode capable MS operation . 37 8.3.1.2 Dual watch capable MS operation . 37 8.3.1.2.1 Full Dual Watch Mobile Station (F-DW-MS) . 37 8.3.1.2.2 Idle Dual Watch Mobile Station (I-DW-MS) . 37 8.4 Usage of DM channel with type 1 DM-REP . 38 8.4.1 Definition of DM channel . 38 8.4.1.1 DM channel arrangement . 38 8.4.1.2 DM channel operation . 38 8.4.2 DM-MAC states . 39 8.4.2.1 DM-MAC state definitions . 39 8.4.2.2 DM-MS channel surveillance procedures . 40 8.4.2.2.1 Initial determination of DM channel state . 40 8.4.2.2.2 Fast call set-up surveillance in idle mode . 40 8.4.2.2.3 DM-MS channel surveillance at call set-up . 40 8.4.2.3 Master DM-MS channel maintenance procedures during a call . 41 SIST EN 300 396-4 V1.4.1:2012

ETSI ETSI EN 300 396-4 V1.4.1 (2011-12) 5 8.4.2.4 Slave DM-MS channel maintenance procedures during a call . 41 8.4.2.4.1 Slave MS channel maintenance during call transaction . 41 8.4.2.4.2 Slave MS signal quality measurement during call transaction . 41 8.4.2.4.3 Slave MS channel maintenance during reservation . 42 8.4.3 Criteria for changing DM-MAC state . 42 8.4.3.1 Criteria for changing DM-MAC state for master DM-MS . 42 8.4.3.2 Criteria for changing DM-MAC state for slave DM-MS . 42 8.4.3.3 Criteria for changing DM-MAC state for idle DM-MS . 42 8.4.4 DM-MS channel monitoring procedures . 42 8.4.4.1 DM channel during initial call set-up and new call transaction by current master MS . 43 8.4.4.2 DM channel during call set-up with presence check . 43 8.4.4.3 DM channel in occupation during a circuit mode call. 43 8.4.4.4 DM channel in reservation during a circuit mode call . 43 8.4.4.5 DM channel in occupation during an SDS call . 44 8.4.4.6 DM channel usage during pre-emption signalling . 44 8.4.4.7 DM channel usage during timing change request signalling . 44 8.4.5 Transmission of layer 3 messages by DM-MAC . 44 8.4.5.1 Transmission of C-plane messages by DM-MAC. 44 8.4.5.2 Transmission of U-plane messages by DM-MAC . 45 8.4.6 Transmission of layer 2 messages generated by DM-MAC . 45 8.4.7 General DM-MAC procedures . 45 8.4.7.1 DM-MAC repeat transmissions . 45 8.4.7.2 DM-MAC frame countdown procedure . 45 8.4.7.3 Use of timers . 45 8.4.7.4 Linearization . 46 8.4.7.5 Fragmentation . 46 8.4.7.6 Fill bit indication . 47 8.4.7.7 Selection of pseudo address . 47 8.4.7.8 Slot flag indication . 47 8.4.7.9 Requests bitmap . 47 8.4.7.10 DM aspects of dual watch operation . 47 8.4.7.10.1 Full and idle dual watch operation. 47 8.4.7.10.2 DM aspects of full dual watch operation . 47 8.4.7.10.3 DM aspects of idle dual watch operation . 48 8.4.7.11 Air interface encryption . 48 8.4.7.12 Channel A or B operation . 48 8.4.7.13 Sending short data as a transaction within a circuit mode call . 48 8.4.7.14 SDS time remaining . 49 8.4.7.15 Timing change procedure . 49 8.4.7.16 Timing change at changeover or pre-emption . 49 8.5 MAC procedures for transfer of signalling messages . 49 8.5.1 Formation of MAC PDU . 49 8.5.2 Addressing . 49 8.5.2.1 Transmission of message . 50 8.5.2.1.1 Addressing in synchronization burst . 50 8.5.2.1.2 Addressing in normal burst. 50 8.5.2.2 Reception of message . 50 8.5.3 Use of air interface encryption . 51 8.5.4 Fragmentation and reconstruction . 51 8.5.4.1 Fragmentation . 51 8.5.4.2 Reconstruction . 52 8.5.5 Fill bit addition and deletion . 53 8.5.6 Transmission and reception of messages by layer 2 . 53 8.5.6.1 Transmission of message . 54 8.5.6.2 Reception of message . 54 8.5.7 Random access protocol . 56 8.5.7.1 Introduction . 56 8.5.7.2 Procedures for master DM-MS . 56 8.5.7.2.1 Indicating frames available for requests . 56 8.5.7.2.2 Monitoring frames available for requests . 57 8.5.7.2.3 Response to pre-emption or changeover request . 57 8.5.7.2.4 Response to timing change request. 57 SIST EN 300 396-4 V1.4.1:2012

ETSI ETSI EN 300 396-4 V1.4.1 (2011-12) 6 8.5.7.3 Procedures for requesting DM-MS . 58 8.5.7.3.1 Preparing for random access . 58 8.5.7.3.2 First transmission of request . 58 8.5.7.3.3 Valid access slots . 58 8.5.7.3.4 Waiting for response . 59 8.5.7.3.5 Subsequent transmission of request . 59 8.5.7.3.6 Abandoning random access attempt . 59 8.6 MAC procedures in traffic mode . 59 8.6.1 Introduction. 59 8.6.2 Criteria for transmission and reception of traffic . 59 8.6.3 Change of U-plane mode . 60 8.6.3.1 Call set-up without presence check . 60 8.6.3.1.1 Outgoing call . 60 8.6.3.1.2 Incoming call . 60 8.6.3.2 Call set-up with presence check . 60 8.6.3.2.1 Outgoing call . 60 8.6.3.2.2 Incoming call . 61 8.6.3.3 Late entry . 61 8.6.3.4 End of traffic transmission . 61 8.6.3.4.1 Master DM-MS . 61 8.6.3.4.2 Slave DM-MS . 61 8.6.4 Exchange of information at the DMD-SAP . 61 8.6.5 Stealing from circuit mode capacity . 61 9 DM-REP layer 2 protocol for a type 1 DM-REP . 61 9.1 Introduction . 61 9.1.1 Functions of lower MAC . 62 9.1.2 Functions of upper MAC . 62 9.2 Interface between lower and upper MAC . 62 9.3 Basic capabilities of the DM-REP physical layer . 63 9.4 Usage of DM channel . 63 9.4.1 DM-REP operation . 63 9.4.1.1 Channel structure . 63 9.4.1.2 Channel synchronization . 64 9.4.2 DM-REP states . 64 9.4.2.1 DM-REP state definitions . 64 9.4.2.2 DM-REP channel surveillance procedures . 65 9.4.2.2.1 DM-REP channel surveillance when idle on a channel in unknown or free state (i.e. in state 0 or 1) . 65 9.4.2.2.2 DM-REP channel surveillance when idle on a busy channel (i.e. in state 2). 65 9.4.2.2.3 DM-REP channel surveillance when idle at DM-MS call set-up . 66 9.4.2.3 DM-REP channel maintenance when active during a call . 66 9.4.3 Criteria for changing DM-REP state . 67 9.4.3.1 Criteria for changing DM-REP state for active DM-REP . 67 9.4.3.2 Criteria for changing DM-REP state for idle DM-REP . 67 9.4.4 DM-REP channel monitoring procedures . 68 9.4.4.1 DM channel during call set-up with presence check . 69 9.4.4.2 DM channel in occupation during a circuit mode call. 69 9.4.4.3 DM channel in reservation during a circuit mode call . 69 9.4.4.4 DM channel in occupation during an SDS call . 70 9.4.4.5 DM channel following pre-emption or changeover acceptance . 70 9.4.4.6 DM channel following timing change announcement . 71 9.4.5 DM-REP presence signal . 71 9.4.5.1 Channel free . 71 9.4.5.2 Channel in occupation . 72 9.4.5.3 Channel in reservation . 73 9.4.6 DM-REP linearization . 73 9.5 DM-REP procedures for re-transmission of signalling messages . 74 9.5.1 Re-transmission of signalling messages received from the master DM-MS . 74 9.5.1.1 Re-transmission of master DM-MS signalling messages received in a DSB . 74 9.5.1.1.1 General procedures . 74 9.5.1.1.2 Re-transmission of DM-SETUP or DM-SETUP PRES message . 75 SIST EN 300 396-4 V1.4.1:2012

ETSI ETSI EN 300 396-4 V1.4.1 (2011-12) 7 9.5.1.1.3 Re-transmission of DM-SDS DATA or DM-SDS UDATA message . 75 9.5.1.1.4 Re-transmission of other messages in a DSB when not using multi-slot regeneration . 76 9.5.1.1.5 Re-transmission of other messages in a DSB during traffic transmission with multi-slot regeneration . 76 9.5.1.2 Re-transmission of master DM-MS signalling messages received in a DNB . 77 9.5.1.2.1 Call transaction without multi-slot regeneration . 77 9.5.1.2.2 Call transaction with multi-slot regeneration . 77 9.5.1.3 Regeneration of missing repetitions on the slave link . 78 9.5.2 Re-transmission of signalling messages received from a slave DM-MS . 78 9.5.2.1 General procedures. 78 9.5.2.2 Re-transmission of response messages from a slave DM-MS. 79 9.5.2.3 Re-transmission of random access request . 79 9.5.3 DM-REP signalling mechanisms . 80 9.5.3.1 Frame countdown procedure . 80 9.5.3.2 Fill bit addition and deletion . 80 9.5.3.3 Null PDU . 80 9.5.3.4 Air interface encryption . 80 9.5.3.5 Timing change procedure . 81 9.5.3.6 Random access procedures for DM-REP . 81 9.6 DM-REP procedures in traffic mode . 81 9.6.1 Introduction. 81 9.6.2 Change of U-plane mode . 82 9.6.2.1 Set-up without presence check . 82 9.6.2.1.1 Switching into traffic mode . 82 9.6.2.1.2 Link establishment failure . 82 9.6.2.2 Set-up with presence check . 82 9.6.2.3 End of traffic transmission . 83 9.6.3 DM-REP traffic operation when active in traffic mode . 83 9.6.3.1 Reception of TCH and STCH on the master link . 83 9.6.3.2 Re-transmission of TCH and STCH on the slave link. 84 9.6.3.2.1 Call transaction without multi-slot regeneration . 84 9.6.3.2.2 Call transaction with multi-slot regeneration . 84 10 PDU descriptions . 85 10.1 Layer 2 PDUs sent in DSB . 85 10.1.1 DMAC-SYNC PDU . 85 10.1.2 DPRES-SYNC PDU . 86 10.2 Layer 2 PDUs sent in DNB . 87 10.3 Layer 2 information element coding . 87 10.3.1 Addressing for URT = 00102 or 10002 . 88 10.3.2 Addressing for URT = 00112 or 10012 . 88 10.3.3 Addressing for URT = 01002 or 01012 . 88 10.3.4 Addressing for URT = 01102 . 88 10.3.4A Addressing for URT = 10102 . 88 10.3.4B Addressing for URT = 10112 . 89 10.3.5 Channel state .
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