SIST ETS 300 396-3:1999

SLOVENSKI STANDARD
SIST ETS 300 396-3:1999
01-julij-1999
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0606
Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation
(DMO); Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) protocol
Ta slovenski standard je istoveten z: ETS 300 396-3 Edition 1
ICS:
33.070.10 Prizemni snopovni radio Terrestrial Trunked Radio
(TETRA) (TETRA)
SIST ETS 300 396-3:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 396-3:1999

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SIST ETS 300 396-3:1999
EUROPEAN ETS 300 396-3
TELECOMMUNICATION March 1998
STANDARD
Source: TETRA Reference: DE/RES-06007-3
ICS: 33.020
Key words: Air interface, protocol, radio, TETRA
Terrestrial Trunked Radio (TETRA);
Technical requirements for Direct Mode Operation (DMO);
Part 3: Mobile Station to Mobile Station (MS-MS)
Air Interface (AI) protocol
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Internet: secretariat@etsi.fr - http://www.etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16
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 1998. All rights reserved.

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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword .11
1 Scope .13
2 Normative references.13
3 Definitions and abbreviations .13
3.1 Definitions .13
3.2 Abbreviations .15
4 Overview of protocol.16
4.1 General .16
4.2 The DM channel.16
4.3 DM call procedures.17
4.3.1 Constraints on the frame structure.17
4.3.2 Setting up a call.18
4.3.3 Changeover in a call.19
4.3.4 Pre-emption of a DM call.20
4.3.5 Terminating a call.21
4.3.6 DM short data call .21
4.4 DM protocol layering .22
5 Layer 3 service description.23
5.1 Introduction .23
5.2 Services offered.23
5.3 Primitive description.24
5.3.1 DMCC-COMPLETE primitive .24
5.3.2 DMCC-RELEASE primitive .24
5.3.3 DMCC-REPORT primitive.25
5.3.4 DMCC-SDS DATA primitive.25
5.3.5 DMCC-SDS REPORT primitive.26
5.3.6 DMCC-SDS UNITDATA primitive .26
5.3.7 DMCC-SETUP primitive.26
5.3.8 DMCC-TPNI primitive.27
5.3.9 DMCC-TX CEASED primitive.27
5.4 Parameter description.28
5.5 States for DMCC-SAP .31
6 Layer 3 protocol.32
6.1 Introduction .32
6.1.1 DMCC protocol states .32
6.1.1.1 IDLE.32
6.1.1.2 CALL SETUP NORMAL ORIGINATING .32
6.1.1.3 CALL SETUP NORMAL TERMINATING .33
6.1.1.4 CALL SETUP PRES_CHECK ORIGINATING .33
6.1.1.5 CALL SETUP PRES_CHECK TERMINATING .33
6.1.1.6 PRE-EMPTION.33
6.1.1.7 CALL ACTIVE TX OCCUPATION.33
6.1.1.8 CALL ACTIVE TX RESERVATION .33
6.1.1.9 CALL ACTIVE RX OCCUPATION.33
6.1.1.10 CALL ACTIVE RX RESERVATION.33
6.1.1.11 WAIT RSP OCCUPATION.33
6.1.1.12 WAIT RSP RESERVATION .33
6.1.1.13 ACK'D SHORT DATA INITIATED .33
6.1.1.14 UNACK'D SHORT DATA INITIATED.33
6.2 Circuit mode calls .34
6.2.1 Procedures for call set-up without presence check.35

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6.2.1.1 Outgoing call . 35
6.2.1.2 Incoming call . 36
6.2.1.3 Temporary group address. 36
6.2.2 Procedures for call set-up with presence check. 37
6.2.2.1 Outgoing call . 37
6.2.2.2 Incoming call . 38
6.2.3 Usage of DM-OCCUPIED PDU. 39
6.2.3.1 Sending of DM-OCCUPIED PDU by master DM-MS . 39
6.2.3.2 Late entry by slave DM-MS. 39
6.2.4 Procedures during occupation. 39
6.2.4.1 Master DM-MS. 39
6.2.4.2 Slave DM-MS. 40
6.2.4.3 Transmitting Party Number Identification (TPNI) . 41
6.2.5 Procedures during reservation. 42
6.2.5.1 Master DM-MS. 42
6.2.5.2 Slave DM-MS. 43
6.2.5.3 Pre-emption of short data sent as a transaction within a
circuit mode call . 44
6.2.6 Procedures to set up a new call by pre-emption. 45
6.3 Short Data Service (SDS) procedures . 46
6.3.1 Sending short data. 47
6.3.1.1 Sending short data on a free channel . 47
6.3.1.1.1 Sending unacknowledged short data
on a free channel . 47
6.3.1.1.2 Sending acknowledged short data on
a free channel . 48
6.3.1.2 Sending short data by pre-emption. 50
6.3.1.3 Sending short data during circuit mode transmission . 51
6.3.1.4 Sending short data as a transaction within a circuit mode
call. 52
6.3.1.4.1 Pre-emption to send short data as a
transaction within a circuit mode call. 52
6.3.1.4.2 Changeover to send short data as a
transaction within a circuit mode call. 53
6.3.1.4.3 Sending the short data as master of
the circuit mode call . 53
6.3.2 Receiving short data . 54
6.3.2.1 Receiving unacknowledged short data . 54
6.3.2.2 Receiving acknowledged short data . 54
6.3.3 Additional addressing . 54
6.3.4 Extended error protection . 55
6.4 Usage of DMA-UNITDATA primitive . 55
7 Layer 2 service description . 56
7.1 Introduction. 56
7.2 Layer 2 architecture. 56
7.2.1 Lower layer management in layer 2. 57
7.3 Service descriptions . 58
7.3.1 Services at the DMA-SAP. 58
7.3.1.1 Services provided to layer 3. 58
7.3.1.2 Service primitives at the DMA-SAP. 59
7.3.1.2.1 DMA-REPORT primitive. 59
7.3.1.2.2 DMA-UNITDATA primitive. 59
7.3.2 Services at the DMC-SAP . 60
7.3.2.1 Services provided to layer 3. 60
7.3.2.2 Service primitives at the DMC-SAP . 60
7.3.2.2.1 DMC-CONFIGURE primitive. 61
7.3.2.2.2 DMC-REPORT primitive . 61
7.3.3 Services at the DMD-SAP . 61
7.3.3.1 Services provided to the U-plane application. 61
7.3.3.2 Service primitives at the DMD-SAP . 61
7.3.3.2.1 DMD-REPORT primitive . 61
7.3.3.2.2 DMD-UNITDATA primitive . 62

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7.4 Parameter listing.62
7.4.1 AI encryption information.62
7.4.2 AI encryption state.62
7.4.3 Call release .62
7.4.4 Call set-up after pre-emption or changeover.62
7.4.5 Changeover request held during occupation.62
7.4.6 Circuit mode information .63
7.4.7 Circuit mode type .63
7.4.8 Communication type.63
7.4.9 Destination address.63
7.4.10 Destination address type.63
7.4.11 DM-SDU .63
7.4.12 DM-SDU length .63
7.4.13 FCS flag .63
7.4.14 Half slot condition .63
7.4.15 Half slot content.63
7.4.16 Half slot importance.64
7.4.17 Half slot position .64
7.4.18 Half slot synchronization.64
7.4.19 Handle to the request .64
7.4.20 Immediate retransmission.64
7.4.21 Incomplete DM-SDS DATA/ACK received.64
7.4.22 Message type .64
7.4.23 New call pre-emption.64
7.4.24 Number of repeats .64
7.4.25 Priority .65
7.4.26 Priority of ongoing call .65
7.4.27 Recent user changeover request .65
7.4.28 Recent user priority .65
7.4.29 Report.65
7.4.30 Reservation time .65
7.4.31 SDS transaction type.65
7.4.32 Source address .65
7.4.33 Source address type .65
7.4.34 Stealing priority.65
7.4.35 Stolen indication .65
7.4.36 Type of pre-emption .66
7.4.37 Valid addresses.66
8 Layer 2 protocol.66
8.1 Introduction .66
8.1.1 Functions of lower MAC .66
8.1.2 Functions of upper MAC.66
8.2 Interface between lower and upper MAC.67
8.2.1 Logical channels defined at the DMV-SAP .67
8.2.2 Service primitives at the DMV-SAP.68
8.2.3 PDU mapping of the logical channels at the DMV-SAP.69
8.2.4 Scrambling mechanism.69
8.2.5 PDU error detection.70
8.2.6 Modes of operation.70
8.2.6.1 DM-MS modes of operation.70
8.2.6.1.1 Idle mode .70
8.2.6.1.2 Signalling mode .71
8.2.6.1.3 Traffic mode.71
8.2.6.2 Operation in traffic mode .72
8.2.6.2.1 Traffic transmission .73
8.2.6.2.2 Stealing mechanism .73
8.2.6.3 Selection of the mode of operation.73
8.3 Basic capabilities of the Physical Layer (PL) .74
8.3.1 DM-MS capabilities .74
8.3.1.1 DM only and dual mode capable MS operation.74
8.3.1.2 Dual watch capable MS operation.75
8.4 Usage of DM channel .75

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8.4.1 Definition of DM channel. 75
8.4.1.1 DM channel arrangement . 75
8.4.1.2 DM channel A operation. 75
8.4.1.3 DM channel B operation. 76
8.4.2 DM channel states. 76
8.4.2.1 DM channel state definitions. 76
8.4.2.2 DM-MS channel surveillance procedures . 77
8.4.2.2.1 Initial determination of DM channel
state. 77
8.4.2.2.2 DM-MS channel surveillance in idle
mode . 77
8.4.2.2.3 DM-MS channel surveillance at call
set-up . 78
8.4.2.3 Master DM-MS channel surveillance procedures during a
call. 79
8.4.2.4 Slave DM-MS channel surveillance procedures during a
call. 79
8.4.2.4.1 Slave MS channel surveillance during
call transaction . 79
8.4.2.4.2 Slave MS signal quality measurement
during call transaction . 79
8.4.2.4.3 Slave MS channel surveillance during
reservation. 79
8.4.2.5 Master MS surveillance procedures in frequency efficient
mode . 80
8.4.2.5.1 Surveillance of channel A. 80
8.4.2.5.2 Surveillance of channel B. 80
8.4.3 DM-MAC states . 80
8.4.3.1 DM-MAC state definitions . 80
8.4.3.2 Criteria for changing DM-MAC state . 81
8.4.4 DM-MS channel monitoring procedures . 82
8.4.4.1 DM channel during call set-up with presence check. 82
8.4.4.2 DM channel in occupation during a circuit mode call. 82
8.4.4.3 DM channel in reservation during a circuit mode call . 82
8.4.4.4 DM channel in occupation during a SDS call. 82
8.4.4.5 DM channel usage during pre-emption signalling. 83
8.4.4.6 DM channel usage during timing change request
signalling . 83
8.4.5 Transmission of layer 3 messages by DM-MAC . 83
8.4.5.1 Transmission of C-plane messages by DM-MAC. 83
8.4.5.1.1 Transmitting DM-SETUP. 83
8.4.5.1.2 Transmitting DM-SETUP PRES. 84
8.4.5.1.3 Transmitting DM-CONNECT. 84
8.4.5.1.4 Transmitting DM-DISCONNECT. 85
8.4.5.1.5 Transmitting DM-CONNECT ACK . 85
8.4.5.1.6 Transmitting DM-RELEASE. 85
8.4.5.1.7 Transmitting DM-OCCUPIED. 85
8.4.5.1.8 Transmitting DM-TX CEASED . 86
8.4.5.1.9 Transmitting DM-TX REQUEST . 86
8.4.5.1.10 Transmitting response to DM-TX
REQUEST. 86
8.4.5.1.11 Transmitting DM-PREEMPT . 86
8.4.5.1.12 Transmitting response to
DM-PREEMPT . 87
8.4.5.1.13 Transmitting DM-SDS UDATA and
DM-SDS DATA . 87
8.4.5.1.14 Transmitting response to DM-SDS
DATA. 88
8.4.5.1.15 Transmitting DM-INFO. 89
8.4.5.2 Transmission of U-plane messages by DM-MAC. 89
8.4.6 Transmission of layer 2 messages generated by DM-MAC . 89
8.4.6.1 Transmitting DM-RESERVED. 89
8.4.6.2 Transmitting DM-SDS OCCUPIED. 90

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8.4.6.3 Transmitting DM-TIMING REQUEST.90
8.4.6.4 Transmitting DM-TIMING ACK.90
8.4.7 General DM-MAC procedures.91
8.4.7.1 DM-MAC repeat transmissions.91
8.4.7.2 DM-MAC frame countdown procedure.91
8.4.7.3 Use of timers .91
8.4.7.4 Linearization .91
8.4.7.5 Fragmentation .91
8.4.7.6 Fill bit indication .92
8.4.7.7 Selection of pseudo address .92
8.4.7.8 Slot flag indication.92
8.4.7.9 Requests bitmap.92
8.4.7.10 DM aspects of dual watch operation .92
8.4.7.10.1 Model of operation .92
8.4.7.10.2 Dual watch synchronization .93
8.4.7.10.3 Dual watch precedence rules .93
8.4.7.11 AI encryption.95
8.4.7.12 Channel A or B operation .95
8.4.7.13 Sending short data as a transaction within a circuit mode
call .95
8.4.7.14 SDS time remaining.95
8.4.7.15 Timing change procedure.96
8.4.7.16 Timing change at changeover or pre-emption.97
8.5 MAC procedures for transfer of signalling messages.97
8.5.1 Formation of MAC PDU.97
8.5.2 Addressing .99
8.5.2.1 Transmission of message .99
8.5.2.1.1 Addressing in synchronization burst .99
8.5.2.1.2 Addressing in normal burst.100
8.5.2.2 Reception of message.100
8.5.3 Use of air interface encryption.101
8.5.4 Fragmentation and reconstruction .102
8.5.4.1 Fragmentation .102
8.5.4.2 Reconstruction.103
8.5.5 Fill bit addition and deletion.104
8.5.5.1 Fill bit addition.104
8.5.5.2 Fill bit deletion.104
8.5.5.3 Null PDU.105
8.5.6 Transmission and reception of messages by layer 2 unacknowledged
service .105
8.5.6.1 Transmission of message .106
8.5.6.2 Reception of message.107
8.5.7 Random access protocol.109
8.5.7.1 Introduction.109
8.5.7.2 Procedures for master DM-MS.109
8.5.7.2.1 Indicating frames available for
requests .109
8.5.7.2.2 Monitoring frames available for
requests .109
8.5.7.2.3 Response to pre-emption or
changeover request .110
8.5.7.2.4 Response to timing change request .111
8.5.7.3 Procedures for requesting DM-MS.111
8.5.7.3.1 Preparing for random access .111
8.5.7.3.2 First transmission of request .112
8.5.7.3.3 Valid access slots .112
8.5.7.3.4 Waiting for response.113
8.5.7.3.5 Subsequent transmission of request .113
8.5.7.3.6 Abandoning random access attempt .114
8.6 MAC procedures in traffic mode .115
8.6.1 Introduction.115
8.6.2 Criteria for transmission and reception of traffic .115
8.6.3 Change of U-plane mode .
...