SIST EN 300 396-3 V1.4.1:2012

• Abstract:

  REN/TETRA-08193

• Status: Published
• Publication Date: 11-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: 12-Jan-2012
• Mandate: BC-T-344
• Ref Project: ETSI EN 300 396-3 V1.4.1 (2011-12) - Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO); Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) protocol

SIST EN 300 396-3 V1.4.1:2012 is the Slovenian adoption of ETSI EN 300 396-3 for Terrestrial Trunked Radio (TETRA) Direct Mode Operation (DMO). It specifies the Mobile Station to Mobile Station (MS-MS) air interface protocol, including the Data Link Layer (DLL) and the network-layer procedures used for voice calls, circuit mode data calls, and short data transfer.

What does SIST EN 300 396-3 V1.4.1:2012 specify?

SIST EN 300 396-3 V1.4.1:2012 specifies the MS-MS Direct Mode Operation air interface for TETRA, with a focus on the services, messages, and protocols used over the air. The document is organized from a protocol overview through Layer 3 and Layer 2 services and protocols, then into message and information-element coding.

Annex	What it covers
Annex A	Timers and constants in a DM-MS operating in direct MS-MS mode
Annex B	FCS calculation
Annex E	Structure of User defined data 4

Clause 1 gives the scope, clause 2 lists references, clause 3 defines terms and abbreviations, clause 4 gives the protocol overview, clauses 5 and 6 describe Layer 3 service and protocol, clauses 7 and 8 describe Layer 2 service and protocol, and clause 9 defines the PDUs and their coded elements.

What are the key requirements of SIST EN 300 396-3 V1.4.1:2012?

SIST EN 300 396-3 V1.4.1:2012 defines how a DM-MS sets up, maintains, changes over, pre-empts, and clears direct mode calls, and how it sends short data. In practice, this is the part that tells terminal implementers which messages, states, and parameters they must handle to interoperate on the air interface.

Call control and short data

Clause 4 describes DM call procedures, including call set-up with and without presence check, changeover, pre-emption, termination, and DM short data calls. Clause 5 defines Layer 3 service primitives such as DMCC-SETUP, DMCC-COMPLETE, DMCC-RELEASE, DMCC-TX CEASED, and the SDS primitives.

That means a DM-MS must know when to start a call, how to answer it, how to hand over the transmitting role, and how to move short data across the same radio resources.

Layer 2 structure and channel use

Clause 7 divides the DLL into upper MAC and lower MAC, and clause 8 defines how the DM-MS uses the DM channel, logical channels, and MAC states. The lower MAC handles burst mapping, preamble and training sequence selection, RSSI, CRC, FEC, interleaving, and scrambling, while the upper MAC handles service access, channel selection, state changes, and PDU mapping.

In practice, this is the part that drives interoperability on the radio frame structure, especially where a DM-MS must choose between signalling mode and traffic mode, or between full-slot and half-slot use.

Traffic, signalling, and stealing

Clause 8.2.6 describes sync signalling mode, signalling mode, and traffic mode. Traffic mode uses the whole timeslot, while signalling can “steal” capacity from traffic by using the STCH, and the Slot Flag (SF) shows when stealing has occurred.

This matters because a terminal must detect when signalling is taking over part of a traffic slot and must report or handle that change correctly.

DM-MS capability and timing

Clause 8.3 sets capabilities for DM only, dual mode capable, and dual watch capable MS operation. A DM-MS shall support DM single-frequency simplex operation, and a Full Dual Watch Mobile Station (F-DW-MS) shall also switch between DMO and TMO frequencies within about half a timeslot.

That means implementers need to design transmit/receive timing, buffering, and channel switching to match the required radio behavior.

Addresses, security, and control fields

Clause 9 defines the message fields used in the protocol, including destination and source addressing, communication type, call type, priority, reservation time, timing flags, and pre-emption fields. It also defines air interface encryption states, encryption key number, and KSG number.

For readers, this is where the document tells you which identifiers and control bits must be carried in each PDU and how they affect call routing, access control, and security handling.

PDU types and message content

Clause 9.2 and clause 9.5 define the main PDUs used on the air interface, including DMAC-DATA, DMAC-FRAG, DMAC-END, DMAC-U-SIGNAL, DMAC-TRAFFIC, DM-SETUP, DM-SETUP PRES, DM-CONNECT, DM-DISCONNECT, DM-OCCUPIED, DM-RELEASE, DM-TX REQUEST, DM-TX ACCEPT, DM-PREEMPT, DM-PRE ACCEPT, DM-INFO, DM-SDS UDATA, DM-SDS DATA, and DM-SDS ACK.

That gives implementers the exact message set they need for call control, short data, and traffic transport.

What terms does SIST EN 300 396-3 V1.4.1:2012 define?

• Direct Mode Call Control (DMCC) - the Layer 3 entity responsible for setting up and maintaining a call in DMO.
• Direct Mode Mobile Station (DM-MS) - the mobile equipment used to obtain TETRA DM services.
• call transaction - one complete unidirectional transmission of information within a call.
• changeover - the transfer of the master role at the end of one call transaction so another can begin.
• Short Data Service (SDS) - the short data transfer service used for acknowledged or unacknowledged short messages.
• Mobile Network Identity (MNI) - the identity information carried in address fields, combining the mobile country and network codes.

Who uses SIST EN 300 396-3 V1.4.1:2012?

SIST EN 300 396-3 V1.4.1:2012 is used by TETRA terminal designers, protocol engineers, radio system integrators, and test laboratories. It is also relevant to quality managers and buyers who need to confirm that a DM-MS supports the expected DMO call procedures, short data handling, addressing, and security fields.

Operators and public-safety or professional radio users rely on it indirectly through equipment procurement, conformance testing, and interoperability checks.

Which standards are used with SIST EN 300 396-3 V1.4.1:2012?

• ETSI EN 300 396-1 - gives the general DMO network design and overall architecture.
• ETSI EN 300 396-2 - gives the radio aspects, including lower-layer coding and scrambling details.
• ETSI EN 300 396-4 - covers the Type 1 repeater air interface.
• ETSI EN 300 396-5 - covers the gateway air interface and gateway-specific message handling.
• ETSI EN 300 396-6 - covers DMO security, including security classes and related algorithms.
• ETSI EN 300 392-1 - provides the TETRA Voice plus Data (V+D) general network design used for wider TETRA context.
• ETSI EN 300 392-2 - provides the TETRA V+D air interface, including status definitions and some shared coding references.

What does the SIST EN 300 396-3 V1.4.1:2012 document contain?

The document contains protocol overviews, state descriptions, service primitives, and detailed PDU and information-element coding rules. It also contains procedures for call set-up, call maintenance, channel reservation, pre-emption, timing adjustment, and short data exchange.

Its tables define the content of each message, including which fields are mandatory, conditional, or specific to a call situation. The figures show the DM-MS configurations for signalling and traffic modes, so implementers can map protocol states to real radio behavior.

Annex A gives the timers and constants used by the DM-MS, which is important for implementation tuning and conformance testing. Annex B defines the FCS calculation, and Annex E defines the structure of User defined data 4 for variable-length short data.

Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)

European Standard
Terrestrial Trunked Radio (TETRA);
Technical requirements for Direct Mode Operation (DMO);
Part 3: Mobile Station to Mobile Station (MS-MS)
Air Interface (AI) protocol
2 Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)

Reference
REN/TETRA-08193
Keywords
air interface, protocol, radio, TETRA
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 Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)
Contents
Intellectual Property Rights . 11
Foreword . 11
1 Scope . 12
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 13
3 Definitions and abbreviations . 13
3.1 Definitions . 13
3.2 Abbreviations . 16
4 Overview of protocol. . 17
4.1 General . 17
4.2 The DM channel . 18
4.3 DM call procedures . 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
4.3.2.1.1 Basic procedure . 20
4.3.2.1.2 Procedure in frequency efficient mode . 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 . 23
4.3.5 Terminating a call . 23
4.3.6 DM short data call . 23
4.3.6.1 Unacknowledged short data message . 24
4.3.6.2 Acknowledged short data message . 24
4.4 DM protocol layering . 25
5 Layer 3 service description . 25
5.1 Introduction . 25
5.2 Services offered . 26
5.3 Primitive description . 26
5.3.1 DMCC-COMPLETE primitive . 27
5.3.2 DMCC-RELEASE primitive . 27
5.3.3 DMCC-REPORT primitive . 27
5.3.4 DMCC-SDS DATA primitive . 27
5.3.5 DMCC-SDS REPORT primitive . 28
5.3.6 DMCC-SDS UNITDATA primitive . 28
5.3.7 DMCC-SETUP primitive . 29
5.3.8 DMCC-TPNI primitive . 30
5.3.9 DMCC-TX CEASED primitive . 30
5.4 Parameter description . 30
5.5 States for DMCC-SAP . 35
6 Layer 3 protocol . 36
6.1 Introduction . 36
6.1.1 DMCC protocol states . 36
6.1.1.1 IDLE . 36
6.1.1.2 CALL SETUP NORMAL ORIGINATING . 36
6.1.1.3 CALL SETUP NORMAL TERMINATING . 36
6.1.1.4 CALL SETUP PRES_CHECK ORIGINATING . 36
6.1.1.5 CALL SETUP PRES_CHECK TERMINATING. 36
6.1.1.6 PRE-EMPTION . 36
6.1.1.7 CALL ACTIVE TX OCCUPATION . 36
6.1.1.8 CALL ACTIVE TX RESERVATION . 37
6.1.1.9 CALL ACTIVE RX OCCUPATION. 37
ETSI
4 Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)
6.1.1.10 CALL ACTIVE RX RESERVATION. 37
6.1.1.11 WAIT RSP OCCUPATION . 37
6.1.1.12 WAIT RSP RESERVATION. 37
6.1.1.13 ACK'D SHORT DATA INITIATED . 37
6.1.1.14 UNACK'D SHORT DATA INITIATED . 37
6.2 Circuit mode calls . 37
6.2.1 Procedures for call set-up without presence check . 38
6.2.1.1 Outgoing call . 38
6.2.1.2 Incoming call. 40
6.2.1.3 Temporary group address . 41
6.2.2 Procedures for call set-up with presence check . 41
6.2.2.1 Outgoing call . 41
6.2.2.2 Incoming call. 43
6.2.3 Usage of DM-OCCUPIED PDU . 44
6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 44
6.2.3.2 Late entry by slave DM-MS . 44
6.2.4 Procedures during occupation . 44
6.2.4.1 Master DM-MS . 44
6.2.4.2 Slave DM-MS . 45
6.2.4.3 Transmitting Party Number Identification (TPNI) . 47
6.2.5 Procedures during reservation. 47
6.2.5.1 Master DM-MS . 47
6.2.5.2 Slave DM-MS . 49
6.2.5.3 Pre-emption of short data sent as a transaction within a circuit mode call . 51
6.2.6 Procedures to set up a new call by pre-emption . 51
6.3 Short Data Service (SDS) procedures . 52
6.3.1 Sending short data . 53
6.3.1.1 Sending short data on a free channel . 53
6.3.1.1.1 Sending unacknowledged short data on a free channel . 53
6.3.1.1.2 Sending acknowledged short data on a free channel . 55
6.3.1.2 Sending short data by pre-emption . 57
6.3.1.3 Sending short data during circuit mode transmission . 58
6.3.1.4 Sending short data as a transaction within a circuit mode call . 59
6.3.1.4.1 Pre-emption to send short data as a transaction within a circuit mode call . 59
6.3.1.4.2 Changeover to send short data as a transaction within a circuit mode call . 60
6.3.1.4.3 Sending the short data as master of the circuit mode call . 60
6.3.2 Receiving short data. 60
6.3.2.1 Receiving unacknowledged short data . 60
6.3.2.2 Receiving acknowledged short data . 61
6.3.3 Additional addressing . 61
6.3.4 Extended error protection . 61
6.3.5 SDS-TL service in DMO . 62
6.3.5.1 Service primitives at the DMTL-SDS-SAP . 62
6.3.5.2 DMTL-SDS primitives' parameters . 65
6.3.5.3 DMTL-SDS PDUs . 67
6.3.5.4 DMTL-SDS procedures . 67
6.4 Usage of DMA-UNITDATA primitive . 70
7 Layer 2 service description . 71
7.1 Introduction . 71
7.2 Layer 2 architecture . 72
7.2.1 Lower layer management in layer 2 . 73
7.3 Service descriptions . 73
7.3.1 Services at the DMA-SAP . 73
7.3.1.1 Services provided to layer 3 . 73
7.3.1.2 Service primitives at the DMA-SAP . 74
7.3.1.2.1 DMA-REPORT primitive. 74
7.3.1.2.2 DMA-UNITDATA primitive . 74
7.3.2 Services at the DMC-SAP . 75
7.3.2.1 Services provided to layer 3 . 75
7.3.2.2 Service primitives at the DMC-SAP . 75
7.3.2.2.1 DMC-CONFIGURE primitive . 76
ETSI
5 Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)
7.3.2.2.2 DMC-REPORT primitive . 76
7.3.3 Services at the DMD-SAP . 76
7.3.3.1 Services provided to the U-plane application . 76
7.3.3.2 Service primitives at the DMD-SAP . 76
7.3.3.2.1 DMD-REPORT primitive. 77
7.3.3.2.2 DMD-UNITDATA primitive . 77
7.4 Parameter listing . 77
7.4.1 Air interface encryption information . 77
7.4.2 Air interface encryption state . 77
7.4.2A Called party in ongoing call . 78
7.4.3 Call release. 78
7.4.4 Call set-up after pre-emption or changeover . 78
7.4.5 Changeover request held during occupation . 78
7.4.5A Channel selection information . 78
7.4.6 Circuit mode information . 78
7.4.7 Circuit mode type . 78
7.4.8 Communication type . 78
7.4.9 Destination address . 78
7.4.10 Destination address type . 79
7.4.10A DM channel . 79
7.4.11 DM-SDU . 79
7.4.12 DM-SDU length . 79
7.4.12A Dual watch information . 79
7.4.13 FCS flag . 79
7.4.14 Half slot condition . 79
7.4.15 Half slot content . 79
7.4.16 Half slot importance. 79
7.4.17 Half slot position . 79
7.4.18 Half slot synchronization . 80
7.4.19 Handle to the request . 80
7.4.20 Immediate retransmission . 80
7.4.21 Incomplete DM-SDS DATA/ACK received . 80
7.4.21A Lower layer quality information . 80
7.4.21B Master of ongoing call . 80
7.4.22 Message type . 80
7.4.23 New call pre-emption. 80
7.4.24 Number of repeats . 81
7.4.25 Priority . 81
7.4.26 Priority of ongoing call . 81
7.4.27 Recent user changeover request . 81
7.4.28 Recent user priority . 81
7.4.29 Report . 81
7.4.30 Reservation time . 81
7.4.31 SDS transaction type . 81
7.4.32 Source address . 81
7.4.33 Source address type . 81
7.4.34 Stealing priority . 82
7.4.35 Stolen indication . 82
7.4.36 Type of pre-emption . 82
7.4.37 Valid addresses . 82
8 Layer 2 protocol . 82
8.1 Introduction . 82
8.1.1 Functions of lower MAC . 82
8.1.2 Functions of upper MAC . 83
8.2 Interface between lower and upper MAC . 83
8.2.1 Logical channels defined at the DMV-SAP . 83
8.2.2 Service primitives at the DMV-SAP . 84
8.2.3 PDU mapping of the logical channels at the DMV-SAP . 85
8.2.4 Scrambling mechanism . 85
8.2.5 PDU error detection . 86
8.2.6 Modes of operation . 86
ETSI
6 Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)
8.2.6.1 DM-MS modes of operation . 86
8.2.6.1.1 Idle mode . 86
8.2.6.1.2 Signalling mode . 87
8.2.6.1.3 Traffic mode . 87
8.2.6.2 Operation in traffic mode . 88
8.2.6.2.1 Traffic transmission . 88
8.2.6.2.2 Stealing mechanism . 89
8.2.6.3 Selection of the mode of operation . 89
8.3 Basic capabilities of the Physical Layer (PL) . 90
8.3.1 DM-MS capabilitie s . 90
8.3.1.1 DM only and dual mode capable MS operation . 90
8.3.1.2 Dual watch capable MS operation . 91
8.3.1.2.1 Full Dual Watch Mobile Station (F-DW-MS) . 91
8.3.1.2.2 Idle Dual Watch Mobile Station (I-DW-MS) . 91
8.4 Usage of DM channel . 91
8.4.1 Definition of DM channel . 91
8.4.1.1 DM channel arrangement . 91
8.4.1.2 DM channel A operation . 91
8.4.1.3 DM channel B operation . 92
8.4.2 DM-MAC states . 93
8.4.2.1 DM-MAC state definitions . 93
8.4.2.2 DM-MS channel surveillance procedures . 94
8.4.2.2.1 Initial determination of DM channel state . 94
8.4.2.2.2 Fast call set-up surveillance in idle mode . 96
8.4.2.2.3 DM-MS channel surveillance at call set-up . 99
8.4.2.3 Master DM-MS channel maintenance procedures during a call . 101
8.4.2.4 Slave DM-MS channel maintenance procedures during a call . 101
8.4.2.4.1 Slave MS channel maintenance during call transaction . 102
8.4.2.4.2 Slave MS signal quality measurement during call transaction . 102
8.4.2.4.3 Slave MS channel maintenance during reservation . 102
8.4.2.5 Additional master MS procedures in frequency efficient mode . 102
8.4.2.5.1 Channel A master MS procedures . 103
8.4.2.5.2 Channel B master MS procedures . 103
8.4.3 Criteria for changing DM-MAC state . 103
8.4.3.1 Criteria for changing DM-MAC state for master DM-MS . 103
8.4.3.2 Criteria for changing DM-MAC state for slave DM-MS . 104
8.4.3.3 Criteria for changing DM-MAC state for idle DM-MS . 105
8.4.4 DM-MS channel monitoring procedures . 107
8.4.4.1 DM channel during call set-up with presence check . 108
8.4.4.2 DM channel in occupation during a circuit mode call. 108
8.4.4.3 DM channel in reservation during a circuit mode call . 108
8.4.4.4 DM channel in occupation during an SDS call . 108
8.4.4.5 DM channel usage during pre-emption signalling . 109
8.4.4.6 DM channel usage during timing change request signalling . 109
8.4.5 Transmission of layer 3 messages by DM-MAC . 109
8.4.5.1 Transmission of C-plane messages by DM-MAC. 109
8.4.5.1.1 Transmitting DM-SETUP. 109
8.4.5.1.2 Transmitting DM-SETUP PRES . 110
8.4.5.1.3 Transmitting DM-CONNECT . 111
8.4.5.1.4 Transmitting DM-DISCONNECT. 111
8.4.5.1.5 Transmitting DM-CONNECT ACK. 111
8.4.5.1.6 Transmitting DM-RELEASE . 111
8.4.5.1.7 Transmitting DM-OCCUPIED . 112
8.4.5.1.8 Transmitting DM-TX CEASED . 112
8.4.5.1.9 Transmitting DM-TX REQUEST. 113
8.4.5.1.10 Transmitting response to DM-TX REQUEST. 113
8.4.5.1.11 Transmitting DM-PREEMPT . 114
8.4.5.1.12 Transmitting response to DM-PREEMPT . 114
8.4.5.1.13 Transmitting DM-SDS UDATA and DM-SDS DATA . 115
8.4.5.1.14 Transmitting response to DM-SDS DATA . 116
8.4.5.1.15 Transmitting DM-INFO . 116
8.4.5.2 Transmission of U-plane messages by DM-MAC . 116
ETSI
7 Final draft ETSI EN 300 396-3 V1.4.0 (2011-08)
8.4.6 Transmission of layer 2 messages generated by DM-MAC . 116
8.4.6.1 Transmitting DM-RESERVED . 117
8.4.6.2 Transmitting DM-SDS OCCUPIED . 117
8.4.6.3 Transmitting DM-TIMING REQUEST . 118
8.4.6.4 Transmitting DM-TIMING ACK . 118
8.4.7 General DM-MAC procedures . 118
8.4.7.1 DM-MAC repeat transmissions . 118
8.4.7.2 DM-MAC frame countdown procedure . 118
8.4.7.3 Use of timers . 119
8.4.7.4 Linearization . 119
8.4.7.5 Fragmentation . 119
8.4.7.6 Fill bit indication . 119
8.4.7.7 Selection of pseudo address . 119
8.4.7.8 Slot flag indication . 120
8.4.7.9 Requests bitmap . 120
8.4.7.10 DM aspects of dual watch operation . 120
8.4.7.10.1 Full and idle dual watch operation. 120
8.4.7.10.2 DM aspects of full dual watch operation . 120
8.4.7.10.3 DM aspects of idle dual watch operation . 124
8.4.7.11 Air interface encryption . 126
8.4.7.12 Channel A or B operation . 126
8.4.7.13 Sending short data as a transaction within a circuit mode call . 126
8.4.7.14 SDS time remaining . 127
8.4.7.15 Timing change procedure . 127
8.4.7.16 Timing change at changeover or pre-emption . 129
8.5 MAC procedures for transfer of signalling messages . 129
8.5.1 Formation of MAC PDU . 129
8.5.2 Addressing . 130
8.5.2.1 Transmission of message . 130
8.5.2.1.1 Addressing in synchronization burst . 130
8.5.2.1.2 Addressing in normal burst. 132
8.5.2.2 Reception of message . 132
8.5.3 Use of air interface encryption . 133
8.5.4 Fragmentation and reconstruction . 134
8.5.4.1 Fragmentation . 134
8.5.4.2 Reconstruction . 135
8.5.5 Fill bit addition and deletion . 136
8.5.5.1 Fill bit addition . 136
8.5.5.2 Fill bit deletion . 137
8.5.5.3 Null PDU .
...

European Standard
Terrestrial Trunked Radio (TETRA);
Technical requirements for Direct Mode Operation (DMO);
Part 3: Mobile Station to Mobile Station (MS-MS)
Air Interface (AI) protocol
2 ETSI EN 300 396-3 V1.4.1 (2011-12)

Reference
REN/TETRA-08193
Keywords
air interface, protocol, radio, TETRA
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 300 396-3 V1.4.1 (2011-12)
Contents
Intellectual Property Rights . 11
Foreword . 11
1 Scope . 12
2 References . 12
2.1 Normative references . 12
2.2 Informative references . 13
3 Definitions and abbreviations . 13
3.1 Definitions . 13
3.2 Abbreviations . 16
4 Overview of protocol. . 17
4.1 General . 17
4.2 The DM channel . 18
4.3 DM call procedures . 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
4.3.2.1.1 Basic procedure . 20
4.3.2.1.2 Procedure in frequency efficient mode . 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 . 23
4.3.5 Terminating a call . 23
4.3.6 DM short data call . 23
4.3.6.1 Unacknowledged short data message . 24
4.3.6.2 Acknowledged short data message . 24
4.4 DM protocol layering . 25
5 Layer 3 service description . 25
5.1 Introduction . 25
5.2 Services offered . 26
5.3 Primitive description . 26
5.3.1 DMCC-COMPLETE primitive . 27
5.3.2 DMCC-RELEASE primitive . 27
5.3.3 DMCC-REPORT primitive . 27
5.3.4 DMCC-SDS DATA primitive . 27
5.3.5 DMCC-SDS REPORT primitive . 28
5.3.6 DMCC-SDS UNITDATA primitive . 28
5.3.7 DMCC-SETUP primitive . 29
5.3.8 DMCC-TPNI primitive . 30
5.3.9 DMCC-TX CEASED primitive . 30
5.4 Parameter description . 30
5.5 States for DMCC-SAP . 35
6 Layer 3 protocol . 36
6.1 Introduction . 36
6.1.1 DMCC protocol states . 36
6.1.1.1 IDLE . 36
6.1.1.2 CALL SETUP NORMAL ORIGINATING . 36
6.1.1.3 CALL SETUP NORMAL TERMINATING . 36
6.1.1.4 CALL SETUP PRES_CHECK ORIGINATING . 36
6.1.1.5 CALL SETUP PRES_CHECK TERMINATING. 36
6.1.1.6 PRE-EMPTION . 36
6.1.1.7 CALL ACTIVE TX OCCUPATION . 36
6.1.1.8 CALL ACTIVE TX RESERVATION . 37
6.1.1.9 CALL ACTIVE RX OCCUPATION. 37
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4 ETSI EN 300 396-3 V1.4.1 (2011-12)
6.1.1.10 CALL ACTIVE RX RESERVATION. 37
6.1.1.11 WAIT RSP OCCUPATION . 37
6.1.1.12 WAIT RSP RESERVATION. 37
6.1.1.13 ACK'D SHORT DATA INITIATED . 37
6.1.1.14 UNACK'D SHORT DATA INITIATED . 37
6.2 Circuit mode calls . 37
6.2.1 Procedures for call set-up without presence check . 38
6.2.1.1 Outgoing call . 38
6.2.1.2 Incoming call. 40
6.2.1.3 Temporary group address . 41
6.2.2 Procedures for call set-up with presence check . 41
6.2.2.1 Outgoing call . 41
6.2.2.2 Incoming call. 43
6.2.3 Usage of DM-OCCUPIED PDU . 44
6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 44
6.2.3.2 Late entry by slave DM-MS . 44
6.2.4 Procedures during occupation . 44
6.2.4.1 Master DM-MS . 44
6.2.4.2 Slave DM-MS . 45
6.2.4.3 Transmitting Party Number Identification (TPNI) . 47
6.2.5 Procedures during reservation. 47
6.2.5.1 Master DM-MS . 47
6.2.5.2 Slave DM-MS . 49
6.2.5.3 Pre-emption of short data sent as a transaction within a circuit mode call . 51
6.2.6 Procedures to set up a new call by pre-emption . 51
6.3 Short Data Service (SDS) procedures . 52
6.3.1 Sending short data . 53
6.3.1.1 Sending short data on a free channel . 53
6.3.1.1.1 Sending unacknowledged short data on a free channel . 53
6.3.1.1.2 Sending acknowledged short data on a free channel . 55
6.3.1.2 Sending short data by pre-emption . 57
6.3.1.3 Sending short data during circuit mode transmission . 58
6.3.1.4 Sending short data as a transaction within a circuit mode call . 59
6.3.1.4.1 Pre-emption to send short data as a transaction within a circuit mode call . 59
6.3.1.4.2 Changeover to send short data as a transaction within a circuit mode call . 60
6.3.1.4.3 Sending the short data as master of the circuit mode call . 60
6.3.2 Receiving short data. 60
6.3.2.1 Receiving unacknowledged short data . 60
6.3.2.2 Receiving acknowledged short data . 61
6.3.3 Additional addressing . 61
6.3.4 Extended error protection . 61
6.3.5 SDS-TL service in DMO . 62
6.3.5.1 Service primitives at the DMTL-SDS-SAP . 62
6.3.5.2 DMTL-SDS primitives' parameters . 65
6.3.5.3 DMTL-SDS PDUs . 67
6.3.5.4 DMTL-SDS procedures . 67
6.4 Usage of DMA-UNITDATA primitive . 70
7 Layer 2 service description . 71
7.1 Introduction . 71
7.2 Layer 2 architecture . 72
7.2.1 Lower layer management in layer 2 . 73
7.3 Service descriptions . 73
7.3.1 Services at the DMA-SAP . 73
7.3.1.1 Services provided to layer 3 . 73
7.3.1.2 Service primitives at the DMA-SAP . 74
7.3.1.2.1 DMA-REPORT primitive. 74
7.3.1.2.2 DMA-UNITDATA primitive . 74
7.3.2 Services at the DMC-SAP . 75
7.3.2.1 Services provided to layer 3 . 75
7.3.2.2 Service primitives at the DMC-SAP . 75
7.3.2.2.1 DMC-CONFIGURE primitive . 76
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5 ETSI EN 300 396-3 V1.4.1 (2011-12)
7.3.2.2.2 DMC-REPORT primitive . 76
7.3.3 Services at the DMD-SAP . 76
7.3.3.1 Services provided to the U-plane application . 76
7.3.3.2 Service primitives at the DMD-SAP . 76
7.3.3.2.1 DMD-REPORT primitive. 77
7.3.3.2.2 DMD-UNITDATA primitive . 77
7.4 Parameter listing . 77
7.4.1 Air interface encryption information . 77
7.4.2 Air interface encryption state . 77
7.4.2A Called party in ongoing call . 78
7.4.3 Call release. 78
7.4.4 Call set-up after pre-emption or changeover . 78
7.4.5 Changeover request held during occupation . 78
7.4.5A Channel selection information . 78
7.4.6 Circuit mode information . 78
7.4.7 Circuit mode type . 78
7.4.8 Communication type . 78
7.4.9 Destination address . 78
7.4.10 Destination address type . 79
7.4.10A DM channel . 79
7.4.11 DM-SDU . 79
7.4.12 DM-SDU length . 79
7.4.12A Dual watch information . 79
7.4.13 FCS flag . 79
7.4.14 Half slot condition . 79
7.4.15 Half slot content . 79
7.4.16 Half slot importance. 79
7.4.17 Half slot position . 79
7.4.18 Half slot synchronization . 80
7.4.19 Handle to the request . 80
7.4.20 Immediate retransmission . 80
7.4.21 Incomplete DM-SDS DATA/ACK received . 80
7.4.21A Lower layer quality information . 80
7.4.21B Master of ongoing call . 80
7.4.22 Message type . 80
7.4.23 New call pre-emption. 80
7.4.24 Number of repeats . 81
7.4.25 Priority . 81
7.4.26 Priority of ongoing call . 81
7.4.27 Recent user changeover request . 81
7.4.28 Recent user priority . 81
7.4.29 Report . 81
7.4.30 Reservation time . 81
7.4.31 SDS transaction type . 81
7.4.32 Source address . 81
7.4.33 Source address type . 81
7.4.34 Stealing priority . 82
7.4.35 Stolen indication . 82
7.4.36 Type of pre-emption . 82
7.4.37 Valid addresses . 82
8 Layer 2 protocol . 82
8.1 Introduction . 82
8.1.1 Functions of lower MAC . 82
8.1.2 Functions of upper MAC . 83
8.2 Interface between lower and upper MAC . 83
8.2.1 Logical channels defined at the DMV-SAP . 83
8.2.2 Service primitives at the DMV-SAP . 84
8.2.3 PDU mapping of the logical channels at the DMV-SAP . 85
8.2.4 Scrambling mechanism . 85
8.2.5 PDU error detection . 86
8.2.6 Modes of operation . 86
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6 ETSI EN 300 396-3 V1.4.1 (2011-12)
8.2.6.1 DM-MS modes of operation . 86
8.2.6.1.1 Idle mode . 86
8.2.6.1.2 Signalling mode . 87
8.2.6.1.3 Traffic mode . 87
8.2.6.2 Operation in traffic mode . 88
8.2.6.2.1 Traffic transmission . 88
8.2.6.2.2 Stealing mechanism . 89
8.2.6.3 Selection of the mode of operation . 89
8.3 Basic capabilities of the Physical Layer (PL) . 90
8.3.1 DM-MS capabilitie s . 90
8.3.1.1 DM only and dual mode capable MS operation . 90
8.3.1.2 Dual watch capable MS operation . 91
8.3.1.2.1 Full Dual Watch Mobile Station (F-DW-MS) . 91
8.3.1.2.2 Idle Dual Watch Mobile Station (I-DW-MS) . 91
8.4 Usage of DM channel . 91
8.4.1 Definition of DM channel . 91
8.4.1.1 DM channel arrangement . 91
8.4.1.2 DM channel A operation . 91
8.4.1.3 DM channel B operation . 92
8.4.2 DM-MAC states . 93
8.4.2.1 DM-MAC state definitions . 93
8.4.2.2 DM-MS channel surveillance procedures . 94
8.4.2.2.1 Initial determination of DM channel state . 94
8.4.2.2.2 Fast call set-up surveillance in idle mode . 96
8.4.2.2.3 DM-MS channel surveillance at call set-up . 99
8.4.2.3 Master DM-MS channel maintenance procedures during a call . 101
8.4.2.4 Slave DM-MS channel maintenance procedures during a call . 101
8.4.2.4.1 Slave MS channel maintenance during call transaction . 102
8.4.2.4.2 Slave MS signal quality measurement during call transaction . 102
8.4.2.4.3 Slave MS channel maintenance during reservation . 102
8.4.2.5 Additional master MS procedures in frequency efficient mode . 102
8.4.2.5.1 Channel A master MS procedures . 103
8.4.2.5.2 Channel B master MS procedures . 103
8.4.3 Criteria for changing DM-MAC state . 103
8.4.3.1 Criteria for changing DM-MAC state for master DM-MS . 103
8.4.3.2 Criteria for changing DM-MAC state for slave DM-MS . 104
8.4.3.3 Criteria for changing DM-MAC state for idle DM-MS . 105
8.4.4 DM-MS channel monitoring procedures . 107
8.4.4.1 DM channel during call set-up with presence check . 108
8.4.4.2 DM channel in occupation during a circuit mode call. 108
8.4.4.3 DM channel in reservation during a circuit mode call . 108
8.4.4.4 DM channel in occupation during an SDS call . 108
8.4.4.5 DM channel usage during pre-emption signalling . 109
8.4.4.6 DM channel usage during timing change request signalling . 109
8.4.5 Transmission of layer 3 messages by DM-MAC . 109
8.4.5.1 Transmission of C-plane messages by DM-MAC. 109
8.4.5.1.1 Transmitting DM-SETUP. 109
8.4.5.1.2 Transmitting DM-SETUP PRES . 110
8.4.5.1.3 Transmitting DM-CONNECT . 111
8.4.5.1.4 Transmitting DM-DISCONNECT. 111
8.4.5.1.5 Transmitting DM-CONNECT ACK. 111
8.4.5.1.6 Transmitting DM-RELEASE . 111
8.4.5.1.7 Transmitting DM-OCCUPIED . 112
8.4.5.1.8 Transmitting DM-TX CEASED . 112
8.4.5.1.9 Transmitting DM-TX REQUEST. 113
8.4.5.1.10 Transmitting response to DM-TX REQUEST. 113
8.4.5.1.11 Transmitting DM-PREEMPT . 114
8.4.5.1.12 Transmitting response to DM-PREEMPT . 114
8.4.5.1.13 Transmitting DM-SDS UDATA and DM-SDS DATA . 115
8.4.5.1.14 Transmitting response to DM-SDS DATA . 116
8.4.5.1.15 Transmitting DM-INFO . 116
8.4.5.2 Transmission of U-plane messages by DM-MAC . 116
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7 ETSI EN 300 396-3 V1.4.1 (2011-12)
8.4.6 Transmission of layer 2 messages generated by DM-MAC . 116
8.4.6.1 Transmitting DM-RESERVED . 117
8.4.6.2 Transmitting DM-SDS OCCUPIED . 117
8.4.6.3 Transmitting DM-TIMING REQUEST . 118
8.4.6.4 Transmitting DM-TIMING ACK . 118
8.4.7 General DM-MAC procedures . 118
8.4.7.1 DM-MAC repeat transmissions . 118
8.4.7.2 DM-MAC frame countdown procedure . 118
8.4.7.3 Use of timers . 119
8.4.7.4 Linearization . 119
8.4.7.5 Fragmentation . 119
8.4.7.6 Fill bit indication . 119
8.4.7.7 Selection of pseudo address . 119
8.4.7.8 Slot flag indication . 120
8.4.7.9 Requests bitmap . 120
8.4.7.10 DM aspects of dual watch operation . 120
8.4.7.10.1 Full and idle dual watch operation. 120
8.4.7.10.2 DM aspects of full dual watch operation . 120
8.4.7.10.3 DM aspects of idle dual watch operation . 124
8.4.7.11 Air interface encryption . 126
8.4.7.12 Channel A or B operation . 126
8.4.7.13 Sending short data as a transaction within a circuit mode call . 126
8.4.7.14 SDS time remaining . 127
8.4.7.15 Timing change procedure . 127
8.4.7.16 Timing change at changeover or pre-emption . 129
8.5 MAC procedures for transfer of signalling messages . 129
8.5.1 Formation of MAC PDU . 129
8.5.2 Addressing . 130
8.5.2.1 Transmission of message . 130
8.5.2.1.1 Addressing in synchronization burst . 130
8.5.2.1.2 Addressing in normal burst. 132
8.5.2.2 Reception of message . 132
8.5.3 Use of air interface encryption . 133
8.5.4 Fragmentation and reconstruction . 134
8.5.4.1 Fragmentation . 134
8.5.4.2 Reconstruction . 135
8.5.5 Fill bit addition and deletion . 136
8.5.5.1 Fill bit addition . 136
8.5.5.2 Fill bit deletion . 137
8.5.5.3 Null PDU . 137
8.5.6
...

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 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) protocol33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 396-3 Version 1.4.1SIST EN 300 396-3 V1.4.1:2012en01-februar-2012SIST EN 300 396-3 V1.4.1:2012SLOVENSKI
STANDARD
European Standard SIST EN 300 396-3 V1.4.1:2012

ETSI ETSI EN 300 396-3 V1.4.1 (2011-12) 2
Reference REN/TETRA-08193 Keywords air interface, protocol, radio, TETRA 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 300 396-3 V1.4.1:2012

ETSI ETSI EN 300 396-3 V1.4.1 (2011-12) 3 Contents Intellectual Property Rights . 11 Foreword . 11 1 Scope . 12 2 References . 12 2.1 Normative references . 12 2.2 Informative references . 13 3 Definitions and abbreviations . 13 3.1 Definitions . 13 3.2 Abbreviations . 16 4 Overview of protocol. 17 4.1 General . 17 4.2 The DM channel . 18 4.3 DM call procedures . 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 4.3.2.1.1 Basic procedure . 20 4.3.2.1.2 Procedure in frequency efficient mode . 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 . 23 4.3.5 Terminating a call . 23 4.3.6 DM short data call . 23 4.3.6.1 Unacknowledged short data message . 24 4.3.6.2 Acknowledged short data message . 24 4.4 DM protocol layering . 25 5 Layer 3 service description . 25 5.1 Introduction . 25 5.2 Services offered . 26 5.3 Primitive description . 26 5.3.1 DMCC-COMPLETE primitive . 27 5.3.2 DMCC-RELEASE primitive . 27 5.3.3 DMCC-REPORT primitive . 27 5.3.4 DMCC-SDS DATA primitive . 27 5.3.5 DMCC-SDS REPORT primitive . 28 5.3.6 DMCC-SDS UNITDATA primitive . 28 5.3.7 DMCC-SETUP primitive . 29 5.3.8 DMCC-TPNI primitive . 30 5.3.9 DMCC-TX CEASED primitive . 30 5.4 Parameter description . 30 5.5 States for DMCC-SAP . 35 6 Layer 3 protocol . 36 6.1 Introduction . 36 6.1.1 DMCC protocol states . 36 6.1.1.1 IDLE . 36 6.1.1.2 CALL SETUP NORMAL ORIGINATING . 36 6.1.1.3 CALL SETUP NORMAL TERMINATING . 36 6.1.1.4 CALL SETUP PRES_CHECK ORIGINATING . 36 6.1.1.5 CALL SETUP PRES_CHECK TERMINATING. 36 6.1.1.6 PRE-EMPTION . 36 6.1.1.7 CALL ACTIVE TX OCCUPATION . 36 6.1.1.8 CALL ACTIVE TX RESERVATION . 37 6.1.1.9 CALL ACTIVE RX OCCUPATION. 37 SIST EN 300 396-3 V1.4.1:2012

ETSI ETSI EN 300 396-3 V1.4.1 (2011-12) 4 6.1.1.10 CALL ACTIVE RX RESERVATION. 37 6.1.1.11 WAIT RSP OCCUPATION . 37 6.1.1.12 WAIT RSP RESERVATION. 37 6.1.1.13 ACK'D SHORT DATA INITIATED . 37 6.1.1.14 UNACK'D SHORT DATA INITIATED . 37 6.2 Circuit mode calls . 37 6.2.1 Procedures for call set-up without presence check . 38 6.2.1.1 Outgoing call . 38 6.2.1.2 Incoming call. 40 6.2.1.3 Temporary group address . 41 6.2.2 Procedures for call set-up with presence check . 41 6.2.2.1 Outgoing call . 41 6.2.2.2 Incoming call. 43 6.2.3 Usage of DM-OCCUPIED PDU . 44 6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 44 6.2.3.2 Late entry by slave DM-MS . 44 6.2.4 Procedures during occupation . 44 6.2.4.1 Master DM-MS . 44 6.2.4.2 Slave DM-MS . 45 6.2.4.3 Transmitting Party Number Identification (TPNI) . 47 6.2.5 Procedures during reservation. 47 6.2.5.1 Master DM-MS . 47 6.2.5.2 Slave DM-MS . 49 6.2.5.3 Pre-emption of short data sent as a transaction within a circuit mode call . 51 6.2.6 Procedures to set up a new call by pre-emption . 51 6.3 Short Data Service (SDS) procedures . 52 6.3.1 Sending short data . 53 6.3.1.1 Sending short data on a free channel . 53 6.3.1.1.1 Sending unacknowledged short data on a free channel . 53 6.3.1.1.2 Sending acknowledged short data on a free channel . 55 6.3.1.2 Sending short data by pre-emption . 57 6.3.1.3 Sending short data during circuit mode transmission . 58 6.3.1.4 Sending short data as a transaction within a circuit mode call . 59 6.3.1.4.1 Pre-emption to send short data as a transaction within a circuit mode call . 59 6.3.1.4.2 Changeover to send short data as a transaction within a circuit mode call . 60 6.3.1.4.3 Sending the short data as master of the circuit mode call . 60 6.3.2 Receiving short data. 60 6.3.2.1 Receiving unacknowledged short data . 60 6.3.2.2 Receiving acknowledged short data . 61 6.3.3 Additional addressing . 61 6.3.4 Extended error protection . 61 6.3.5 SDS-TL service in DMO . 62 6.3.5.1 Service primitives at the DMTL-SDS-SAP . 62 6.3.5.2 DMTL-SDS primitives' parameters . 65 6.3.5.3 DMTL-SDS PDUs . 67 6.3.5.4 DMTL-SDS procedures . 67 6.4 Usage of DMA-UNITDATA primitive . 70 7 Layer 2 service description . 71 7.1 Introduction . 71 7.2 Layer 2 architecture . 72 7.2.1 Lower layer management in layer 2 . 73 7.3 Service descriptions . 73 7.3.1 Services at the DMA-SAP . 73 7.3.1.1 Services provided to layer 3 . 73 7.3.1.2 Service primitives at the DMA-SAP . 74 7.3.1.2.1 DMA-REPORT primitive. 74 7.3.1.2.2 DMA-UNITDATA primitive . 74 7.3.2 Services at the DMC-SAP . 75 7.3.2.1 Services provided to layer 3 . 75 7.3.2.2 Service primitives at the DMC-SAP . 75 7.3.2.2.1 DMC-CONFIGURE primitive . 76 SIST EN 300 396-3 V1.4.1:2012

ETSI ETSI EN 300 396-3 V1.4.1 (2011-12) 5 7.3.2.2.2 DMC-REPORT primitive . 76 7.3.3 Services at the DMD-SAP . 76 7.3.3.1 Services provided to the U-plane application . 76 7.3.3.2 Service primitives at the DMD-SAP . 76 7.3.3.2.1 DMD-REPORT primitive. 77 7.3.3.2.2 DMD-UNITDATA primitive . 77 7.4 Parameter listing . 77 7.4.1 Air interface encryption information . 77 7.4.2 Air interface encryption state . 77 7.4.2A Called party in ongoing call . 78 7.4.3 Call release. 78 7.4.4 Call set-up after pre-emption or changeover . 78 7.4.5 Changeover request held during occupation . 78 7.4.5A Channel selection information . 78 7.4.6 Circuit mode information . 78 7.4.7 Circuit mode type . 78 7.4.8 Communication type . 78 7.4.9 Destination address . 78 7.4.10 Destination address type . 79 7.4.10A DM channel . 79 7.4.11 DM-SDU . 79 7.4.12 DM-SDU length . 79 7.4.12A Dual watch information . 79 7.4.13 FCS flag . 79 7.4.14 Half slot condition . 79 7.4.15 Half slot content . 79 7.4.16 Half slot importance. 79 7.4.17 Half slot position . 79 7.4.18 Half slot synchronization . 80 7.4.19 Handle to the request . 80 7.4.20 Immediate retransmission . 80 7.4.21 Incomplete DM-SDS DATA/ACK received . 80 7.4.21A Lower layer quality information . 80 7.4.21B Master of ongoing call . 80 7.4.22 Message type . 80 7.4.23 New call pre-emption. 80 7.4.24 Number of repeats . 81 7.4.25 Priority . 81 7.4.26 Priority of ongoing call . 81 7.4.27 Recent user changeover request . 81 7.4.28 Recent user priority . 81 7.4.29 Report . 81 7.4.30 Reservation time . 81 7.4.31 SDS transaction type . 81 7.4.32 Source address . 81 7.4.33 Source address type . 81 7.4.34 Stealing priority . 82 7.4.35 Stolen indication . 82 7.4.36 Type of pre-emption . 82 7.4.37 Valid addresses . 82 8 Layer 2 protocol . 82 8.1 Introduction . 82 8.1.1 Functions of lower MAC . 82 8.1.2 Functions of upper MAC . 83 8.2 Interface between lower and upper MAC . 83 8.2.1 Logical channels defined at the DMV-SAP . 83 8.2.2 Service primitives at the DMV-SAP . 84 8.2.3 PDU mapping of the logical channels at the DMV-SAP . 85 8.2.4 Scrambling mechanism . 85 8.2.5 PDU error detection . 86 8.2.6 Modes of operation . 86 SIST EN 300 396-3 V1.4.1:2012

ETSI ETSI EN 300 396-3 V1.4.1 (2011-12) 6 8.2.6.1 DM-MS modes of operation . 86 8.2.6.1.1 Idle mode . 86 8.2.6.1.2 Signalling mode . 87 8.2.6.1.3 Traffic mode . 87 8.2.6.2 Operation in traffic mode . 88 8.2.6.2.1 Traffic transmission . 88 8.2.6.2.2 Stealing mechanism . 89 8.2.6.3 Selection of the mode of operation . 89 8.3 Basic capabilities of the Physical Layer (PL) . 90 8.3.1 DM-MS capabilities . 90 8.3.1.1 DM only and dual mode capable MS operation . 90 8.3.1.2 Dual watch capable MS operation . 91 8.3.1.2.1 Full Dual Watch Mobile Station (F-DW-MS) . 91 8.3.1.2.2 Idle Dual Watch Mobile Station (I-DW-MS) . 91 8.4 Usage of DM channel . 91 8.4.1 Definition of DM channel . 91 8.4.1.1 DM channel arrangement . 91 8.4.1.2 DM channel A operation . 91 8.4.1.3 DM channel B operation . 92 8.4.2 DM-MAC states . 93 8.4.2.1 DM-MAC state definitions . 93 8.4.2.2 DM-MS channel surveillance procedures . 94 8.4.2.2.1 Initial determination of DM channel state . 94 8.4.2.2.2 Fast call set-up surveillance in idle mode . 96 8.4.2.2.3 DM-MS channel surveillance at call set-up . 99 8.4.2.3 Master DM-MS channel maintenance procedures during a call . 101 8.4.2.4 Slave DM-MS channel maintenance procedures during a call . 101 8.4.2.4.1 Slave MS channel maintenance during call transaction . 102 8.4.2.4.2 Slave MS signal quality measurement during call transaction . 102 8.4.2.4.3 Slave MS channel maintenance during reservation . 102 8.4.2.5 Additional master MS procedures in frequency efficient mode . 102 8.4.2.5.1 Channel A master MS procedures . 103 8.4.2.5.2 Channel B master MS procedures . 103 8.4.3 Criteria for changing DM-MAC state . 103 8.4.3.1 Criteria for changing DM-MAC state for master DM-MS . 103 8.4.3.2 Criteria for changing DM-MAC state for slave DM-MS . 104 8.4.3.3 Criteria for changing DM-MAC state for idle DM-MS . 105 8.4.4 DM-MS channel monitoring procedures . 107 8.4.4.1 DM channel during call set-up with presence check . 108 8.4.4.2 DM channel in occupation during a circuit mode call. 108 8.4.4.3 DM channel in reservation during a circuit mode call . 108 8.4.4.4 DM channel in occupation during an SDS call . 108 8.4.4.5 DM channel usage during pre-emption signalling . 109 8.4.4.6 DM channel usage during timing change request signalling . 109 8.4.5 Transmission of layer 3 messages by DM-MAC . 109 8.4.5.1 Transmission of C-plane messages by DM-MAC. 109 8.4.5.1.1 Transmitting DM-SETUP. 109 8.4.5.1.2 Transmitting DM-SETUP PRES . 110 8.4.5.1.3 Transmitting DM-CONNECT . 111 8.4.5.1.4 Transmitting DM-DISCONNECT. 111 8.4.5.1.5 Transmitting DM-CONNECT ACK. 111 8.4.5.1.6 Transmitting DM-RELEASE . 111 8.4.5.1.7 Transmitting DM-OCCUPIED . 112 8.4.5.1.8 Transmitting DM-TX CEASED . 112 8.4.5.1.9 Transmitting DM-TX REQUEST. 113 8.4.5.1.10 Transmitting response to DM-TX REQUEST. 113 8.4.5.1.11 Transmitting DM-PREEMPT . 114 8.4.5.1.12 Transmitting response to DM-PREEMPT . 114 8.4.5.1.13 Transmitting DM-SDS UDATA and DM-SDS DATA . 115 8.4.5.1.14 Transmitting response to DM-SDS DATA . 116 8.4.5.1.15 Transmitting DM-INFO . 116 8.4.5.2 Transmission of U-plane messages by DM-MAC . 116 SIST EN 300 396-3 V1.4.1:2012

ETSI ETSI EN 300 396-3 V1.4.1 (2011-12) 7 8.4.6 Transmission of layer 2 messages generated by DM-MAC . 116 8.4.6.1 Transmitting DM-RESERVED . 117 8.4.6.2 Transmitting DM-SDS OCCUPIED . 117 8.4.6.3 Transmitting DM-TIMING REQUEST . 118 8.4.6.4 Transmitting DM-TIMING ACK . 118 8.4.7 General DM-MAC procedures . 118 8.4.7.1 DM-MAC repeat transmissions . 118 8.4.7.2 DM-MAC frame countdown procedure . 118 8.4.7.3 Use of timers . 119 8.4.7.4 Linearization . 119 8.4.7.5 Fragmentation . 119 8.4.7.6 Fill bit indication . 119 8.4.7.7 Selection of pseudo address . 119 8.4.7.8 Slot flag indication . 120 8.4.7.9 Requests bitmap . 120 8.4.7.10 DM aspects of dual watch operation . 120 8.4.7.10.1 Full and idle dual watch operation. 120 8.4.7.10.2 DM aspects of full dual watch operation . 120 8.4.7.10.3 DM aspects of idle dual watch operation . 124 8.4.7.11 Air interface encryption . 126 8.4.7.12 Channel A or B operation . 126 8.4.7.13 Sending short data as a transaction within a circuit mode call . 126 8.4.7.14 SDS time remaining . 127 8.4.7.15 Timing change procedure . 127 8.4.7.16 Timing change at changeover or pre-emption . 129 8.5 MAC procedures for transfer of signalling messages . 129 8.5.1 Formation of MAC PDU . 129 8.5.2 Addressing . 130 8.5.2.1 Transmission of message . 130 8.5.2.1.1 Addressing in synchronization burst . 130 8.5.2.1.2 Addressing in normal burst. 132 8.5.2.2 Reception of message . 132 8.5.3 Use of air interface encryption . 133 8.5.4 Fragmentation and reconstruction . 134 8.5.4.1 Fragmentation . 134 8.5.4.2 Reconstruction . 135 8.5.5 Fill bit addition and deletion . 136 8.5.5.1 Fill bit addition . 136 8.5.5.2 Fill bit deletion . 137 8.5.5.3 Null PDU .
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