ETSI EN 300 396-10 V1.1.2 (2002-08)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.QDþLQ0'02Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO); Part 10: Managed Direct Mode Operation (M-DMO)33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 396-10 Version 1.1.2SIST EN 300 396-10 V1.1.2:2003en01-december-2003SIST EN 300 396-10 V1.1.2:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 2
Reference DEN/TETRA-02042-10 Keywords DMO, PDO, TETRA, data, radio ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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© European Telecommunications Standards Institute 2002. All rights reserved.
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ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 3
Contents Intellectual Property Rights.5 Foreword.5 1 Scope.6 2 References.7 3 Definitions and abbreviations.7 3.1 Definitions.7 3.2 Abbreviations.9 4 Overview of M-DMO.10 5 M-DM-MS.13 5.1 Operation of M-DM-MS.13 5.2 M-DM-MS authorized by M-DM-AUTH.13 5.3 V+D authorized M-DM-MS.14 5.4 Transmit authorization for M-DM-MS.15 5.4.1 Transmit authorization for M-DM-MS authorized by M-DM-AUTH.15 5.4.2 Transmit authorization for V+D authorized M-DM-MS.16 5.4.3 Release cause element.16 6 M-DM-AUTH.16 6.1 Operation of M-DM-AUTH.16 6.2 Loss of link to SwMI.18 6.3 Managed out-of-range or dual mode operation.18 6.4 Maintaining link to M-DM-MSs.18 6.5 M-DM-AUTH direct mode procedures.18 6.5.1 Direct mode procedures for stand-alone M-DM-AUTH.18 6.5.1.1 General.18 6.5.1.2 Basic capabilities of stand-alone M-DM-AUTH's physical layer.19 6.5.1.3 State definitions for stand-alone M-DM-AUTH.19 6.5.1.4 Channel surveillance procedures for stand-alone M-DM-AUTH.19 6.5.1.4.1 Initial determination of DM channel state by stand-alone M-DM-AUTH.20 6.5.1.4.2 Channel surveillance procedures after initial determination of channel state.20 6.5.1.4.3 Channel surveillance only prior to transmission of presence signal.21 6.5.1.5 Criteria for changing state for stand-alone M-DM-AUTH.21 6.5.1.6 Linearization by stand-alone M-DM-AUTH.21 6.5.2 Direct mode procedures for M-DM-REP, M-DM-GATE or M-DM-REP/GATE.21 6.6 M-DM-AUTH V+D procedures.21 7 Operation of M-DMO channels.22 7.1 General procedures.22 7.2 Withdrawing authorization.22 7.3 Power class.22 8 Authorization presence signal.23 8.1 M-DMO presence signal.23 8.2 Transmission rules for authorization presence signal.23 8.2.1 Transmission of presence signal by stand-alone M-DM-AUTH.23 8.2.1.1 Channel free.23 8.2.1.1.1 Carrier free.23 8.2.1.1.2 One DM channel free.24 8.2.1.2 Channel occupied or reserved.24 8.2.2 Transmission of presence signal by M-DM-REP.24 8.2.3 Transmission of presence signal by M-DM-GATE or M-DM-REP/GATE.25 8.3 DPRES-SYNC PDU.25 8.3.1 DPRES-SYNC PDU for stand-alone M-DM-AUTH.26 8.3.1.1 Definition of DPRES-SYNC PDU for stand-alone M-DM-AUTH.26 SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 4
8.3.1.2 DPRES-SYNC element definitions for stand-alone M-DM-AUTH.27 8.3.1.2.1 Addressing for URT = 00102.27 8.3.1.2.2 Addressing for URT = 00112.27 8.3.1.2.3 Addressing for URT = 01002 or 01012.28 8.3.1.2.4 Addressing for URT = 01102.28 8.3.1.2.5 Channel state.28 8.3.1.2.6 Channel usage.29 8.3.1.2.7 Device address.29 8.3.1.2.8 Frequency efficient mode flag.29 8.3.1.2.9 Maximum DM-MS power class.29 8.3.1.2.10 M-DMO flag.30 8.3.1.2.11 MNI of controlling SwMI.30 8.3.1.2.12 Number of validity time units.30 8.3.1.2.13 Presence signal dual watch synchronization flag.30 8.3.1.2.14 Usage restriction type (URT).31 8.3.1.2.15 Validity time unit.31 8.3.2 DPRES-SYNC PDU for M-DM-REP.31 8.3.3 DPRES-SYNC PDU for M-DM-GATE or M-DM-REP/GATE.32 Annex A (normative): Timers and constants specific to M-DMO.33 A.1 Timers and constants in M-DM-MS.33 A.2 Timers and constants in M-DM-AUTH.33 Annex B (normative): Differences for direct MS-MS operation.34 Annex C (normative): Differences for type 1 repeater operation.37 C.1 Differences for M-DM-MS.37 C.2 Differences for M-DM-REP.37 Annex D (normative): Differences for gateway operation.38 D.1 Differences for M-DM-MS.38 D.2 Differences for M-DM-GATE or M-DM-REP/GATE.38 Annex E (normative): Differences for type 2 repeater operation.39 E.1 Differences for M-DM-MS.39 E.2 Differences for M-DM-REP.39 Annex F (normative): Differences for V+D authorized M-DM-MS.40 Annex G (informative): Bibliography.41 History.42
ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 5
Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Project Terrestrial Trunked Radio (TETRA). The present document is part 10 of a multi-part deliverable covering the Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO), as identified below: Part 1: General network design; Part 2: Radio aspects; Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) protocol; Part 4: Type 1 repeater air interface; Part 5: Gateway air interface; Part 6: Security; Part 7: Type 2 repeater air interface; Part 8: Protocol Implementation Conformance Statement (PICS) proforma specification; Part 10: Managed Direct Mode Operation (M-DMO).
National transposition dates Date of adoption of this EN: 16 August 2002 Date of latest announcement of this EN (doa): 30 November 2002 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2003 Date of withdrawal of any conflicting National Standard (dow): 31 May 2003
ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 6
1 Scope The multi-part deliverable ETS/EN 300 396 defines the Terrestrial Trunked Radio (TETRA) Direct Mode Operation (DMO). It specifies the basic air interface, the interworking between Direct Mode (DM) groups via repeaters, and interworking with the TETRA Voice plus Data (V+D) system via gateways. It also specifies the security aspects in TETRA DMO, and the intrinsic services that are supported in addition to the basic bearer and teleservices. The present document defines TETRA Managed Direct Mode Operation (M-DMO). M-DMO provides a means to restrict the use of Direct Mode Operation (DMO) by requiring prior authorization before a Direct Mode Mobile Station (DM-MS) is permitted to transmit on a radio frequency. This modifies the operation of DM-MSs from that specified in ETS 300 396-3 [3], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7]. M-DMO provides a control mechanism by which radio frequencies (M-DMO frequencies) may be given for DMO use for a period of time; those frequencies are considered to be managed frequencies. All M-DMO devices operating on a managed frequency shall comply with the transmit restrictions defined in the present document. An M-DMO DM-MS (M-DM-MS) may receive the authorization to transmit from a broadcast signal sent on the M-DMO frequency. Or, alternatively, it may obtain the authorization directly on the V+D side from the SwMI or from an M-DMO management station. The authorizing unit which sends the broadcast signal on the M-DMO frequency is referred to as an M-DM-AUTH. It obtains the authorization to operate as an M-DM-AUTH from the V+D SwMI or from a management station that is authorized to allocate frequencies for M-DMO. An M-DM-AUTH may be a stand-alone unit (performing only the authorization function), or it may perform also the function of a DM-REP, DM-GATE or DM-REP/GATE. The content of the present document is as follows: - Clause 4: provides an overview of M-DMO; - Clause 5: describes the procedures for M-DMO mobile stations; - Clause 6: describes the procedures for M-DM-AUTHs; - Clause 7: describes the operation of M-DMO frequencies; - Clause 8: describes the usage of the authorization presence signal; - Annex A: lists the timers and constants specific to M-DMO; - Annexes B through F: describe the differences from ETS 300 396-3 [3], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7] arising from M-DMO. The present document assumes familiarity with operation of TETRA in a network environment as described in EN 300 392, and with operation of TETRA in Direct Mode as described in other parts of ETS/EN 300 396. The present document does not define the process for deciding which frequencies are allocated to M-DMO use. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 7
2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. • References are either specific (identified by date of publication and/or edition number or version number) or non-specific. • For a specific reference, subsequent revisions do not apply. • For a non-specific reference, the latest version applies. [1] ETSI ETS 300 396-1: "Terrestrial Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 1: General Network Design". [2] ETSI EN 300 396-2: " Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO); Part 2: Radio aspects". [3] ETSI ETS 300 396-3: "Terrestrial Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) Protocol". [4] ETSI EN 300 396-4: "Terrestrial Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 4: Type 1 repeater air interface". [5] ETSI ETS 300 396-5: "Terrestrial Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 5: Gateway air interface". [6] ETSI ETS 300 396-6: "Terrestrial Trunked Radio (TETRA); Direct Mode Operation (DMO); Part 6: Security". [7] ETSI EN 300 396-7: "Terrestrial Trunked Radio (TETRA); Technical requirements for Direct Mode Operation (DMO); Part 7: Type 2 repeater air interface". [8] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air Interface (AI)". 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: authorization datum point: geographical point in space from which M-DMO is allowed authorization presence signal: message that is transmitted by an M-DM-AUTH on an M-DMO RF carrier NOTE: It permits M-DM-MSs which receive this message to know that the M-DM-AUTH is within range. It indicates which M-DM-MSs are authorized to transmit on the RF carrier, and the validity time for which those M-DM-MSs are authorized. call: individual call or group call NOTE 1: An individual call is a complete sequence of related call transactions between two MSs. There are always two participants in an individual call. NOTE 2: A group call is a complete sequence of related call transactions involving two or more MSs. The number of participants in a group call is not fixed, but is at least two. NOTE 3: Participants may join (late entry) and leave an ongoing call. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 8
call transaction: all of the functions associated with a complete unidirectional transmission of information during a call NOTE: A call is made up of one or more call transactions. In a simplex call these call transactions are sequential. changeover: within a call, the process of effecting a transfer of the master role (and hence transmitting MS) at the end of one call transaction so that another can commence Direct Mode Call Control (DMCC): layer 3 entity responsible for setting up and maintaining a call in DMO DM channel: specific grouping of timeslots in the DM multiplex structure related to a particular DM RF carrier i.e. DM frequency (or to a pair of duplex-spaced RF carriers for operation with a type 1B or type 2 DM-REP or a type 1B DM-REP/GATE) NOTE: The grouping may not always be fixed, but in DMO when operating in frequency efficient mode as an example, there are two DM channels, identified by the letters A and B. Direct Mode Operation (DMO): mode of simplex operation where mobile subscriber radio units may communicate using radio frequencies which may be monitored by, but which are outside the control of, the TETRA V+D network NOTE: DM operation is performed without intervention of any base station. direct mode presence signal: message that is transmitted by a DM-REP, DM-GATE, DM-REP/GATE or M-DM-AUTH in order to indicate its presence on a DM RF carrier NOTE: It permits DM-MSs which receive this message to know that the DM-REP, DM-GATE, DM-REP/GATE or M-DM-AUTH is within range. Direct Mode Mobile Station (DM-MS): physical grouping that contains all of the mobile equipment that is used to obtain TETRA DM services NOTE: A DM-MS may have one of three roles: - master: if the DM-MS is either active in a call transaction transmitting traffic or control data, or is reserving the channel by means of channel reservation signalling; - slave: if the DM-MS is receiving traffic and/or signalling in a call; or - idle: if the DM-MS is not in a call. DUal Mode switchable Mobile Station (DU-MS): MS that is capable of both TETRA DMO and TETRA V+D operation NOTE: Only one mode can be selected at any given time and the MS is not capable of monitoring a DM RF carrier while in V+D mode or a V+D channel while in DMO. Dual Watch Mobile Station (DW-MS): MS that is capable of both TETRA DMO and TETRA V+D operation NOTE: The MS is capable of periodically monitoring the V+D control channel while in a DM call, a DM RF carrier while in a V+D call and, when idle, it periodically monitors both the DM RF carrier and the V+D control channel. Direct Mode GATEway (DM-GATE): device which provides gateway connectivity between DM-MS(s) and the TETRA V+D network NOTE: The gateway provides the interface between TETRA DMO and TETRA V+D mode. Direct Mode REPeater (DM-REP): device that operates in TETRA DMO and provides a repeater function to enable two or more DM-MSs to extend their coverage range NOTE: It may be either a type 1 DM-REP, capable of supporting only a single call on the air interface, or a type 2 DM-REP, capable of supporting two calls on the air interface. A type 1 DM-REP may operate on either a single RF carrier (type 1A DM-REP) or a pair of duplex-spaced RF carriers (type 1B DM-REP). A type 2 DM-REP operates on a pair of duplex-spaced RF carriers. In the case of a type 1B or type 2 DM-REP, one of the RF carriers is used as the "uplink" from DM-MSs to the DM-REP and the other is used as the "downlink" from the DM-REP to DM-MSs. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 9
Direct Mode REPeater/GATEway (DM-REP/GATE): device that combines the functions of a Direct Mode repeater and a Direct Mode gateway in a single implementation and is capable of providing both functions simultaneously (so that, during a call transaction initiated by a DM-MS, the DM-REP/GATE provides gateway connectivity to the TETRA V+D network and also provides a repeater function on the DM channel) NOTE: The repeater part of the combined implementation may be either a type 1A repeater, operating on a single DM RF carrier, or a type 1B repeater, operating on a pair of duplex-spaced DM RF carriers. frequency efficient mode: mode of operation where two independent DM communications are supported on a single RF carrier (or pair of duplex-spaced RF carriers for operation with a type 2 DM-REP) NOTE: In frequency efficient mode the two DM channels are identified as channel A and channel B. gateway: generic term used to describe either a pure DM-GATE or a combined implementation with a repeater (DM-REP/GATE) Managed Direct Mode Operation (M-DMO): method of operation in which a direct mode terminal is only permitted to transmit when it has received a signal authorizing it to do so Managed Direct Mode AUTHorizing unit (M-DM-AUTH): device that transmits an authorization presence signal on a DM RF carrier NOTE: An M-DM-AUTH may be a stand-alone unit, performing only the authorization function, or it may perform also the function of a DM-REP, DM-GATE or DM-REP/GATE (in which case it is referred to as an M-DM-REP, M-DM-GATE or M-DM-REP/GATE respectively). M-DMO management station: station that is accessed via the V+D network and is authorized to allocate frequencies for M-DMO Managed Direct Mode Mobile Station (M-DM-MS): DM-MS that is using managed direct mode operation NOTE: An M-DM-MS is not permitted to transmit on the DM RF carrier unless it has received a signal containing authorization and the authorized time has not expired. The authorization may have been received from an M-DM-AUTH transmitting on the DM RF carrier. Alternatively the authorization may have been received from the V+D SwMI or an M-DMO management station (in which case the M-DM-MS is referred to as a V+D authorized M-DM-MS). normal mode: mode of operation where only one DM communication is supported on an RF carrier (or pair of duplex-spaced RF carriers for operation with a type 1B DM-REP or type 1B DM-REP/GATE) surveillance: process of determining the current state of the DM RF carrier when in idle mode trunked voice and data network: network which uses the TETRA V+D operation V+D authorized M-DM-MS: type of M-DM-MS that receives its authorization to transmit on the DM RF carrier directly from the V+D SwMI or from an M-DMO management station via the V+D network V+D operation: mode of operation where MSs may communicate via the TETRA V+D air interface which is controlled by the TETRA Switching and Management Infrastructure (SwMI) 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: DM Direct Mode DMO Direct Mode Operation DM-MS Direct Mode Mobile Station DU-MS DUal mode (V+D/Direct Mode) switchable Mobile Station DW-MS Dual Watch Mobile Station DM-REP Direct Mode REPeater DM-GATE Direct Mode GATEway DM-REP/GATE Direct Mode REPeater/GATEway DMCC Direct Mode Call Control entity DSB Direct Mode Synchronization Burst SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 10 GPS Global Positioning System MAC Medium Access Control M-DMO Managed Direct Mode Operation M-DM-MS Managed Direct Mode Mobile Station M-DM-AUTH Managed Direct Mode AUTHorization unit M-DM-REP Managed Direct Mode REPeater M-DM-GATE Managed Direct Mode GATEway M-DM-REP/GATE Managed Direct Mode REPeater/GATEway MNI Mobile Network Identity MS Mobile Station PDU Protocol Data Unit RF Radio Frequency SDS Short Data Service SDS-TL SDS Transport Layer SSI Short Subscriber Identity SwMI Switching and Management Infrastructure TETRA TErrestrial Trunked RAdio TSI TETRA Subscriber Identity V+D Voice plus Data 4 Overview of M-DMO Managed Direct Mode Operation (M-DMO) enables the use of DMO to be controlled by providing a mechanism by which frequencies may be given for DMO use for a period of time. The objective of M-DMO is to constrain the transmission by the M-DMO terminals such that they will not transmit in a geographical area in which they are not authorized to transmit. There are two types of M-DMO terminal: - M-DMO mobile station (M-DM-MS); - M-DMO authorizing unit (M-DM-AUTH). An M-DM-MS shall not transmit on an M-DMO RF carrier (i.e. frequency) unless it has received a signal containing authorization and the authorized time has not expired. The M-DM-MS may have received the authorization from an M-DM-AUTH transmitting on the managed RF carrier. Alternatively, an M-DM-MS may be capable of receiving the authorization directly on the V+D side from the SwMI or from an M-DMO management station via the V+D network. Visual and/or audible indications should be given to the user of the M-DM-MS indicating whether transmission is enabled or inhibited. NOTE: The term "M-DM-MS" in the present document refers to an MS when it is operating on an RF carrier on which the use of M-DMO is required. It is expected that some MSs will only be permitted to operate as an M-DM-MS. Other MSs may be permitted to use non-managed DMO in some frequency bands (where they may use ETS 300 396-3 [3], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7] without amendment), whereas they may be required to operate as an M-DM-MS in other frequency bands. The M-DM-AUTH receives its authorization to operate on an RF carrier from the V+D SwMI, or from a management station that is authorized to allocate frequencies for M-DMO. An M-DM-AUTH may be a stand-alone unit, performing only the authorization function, or it may perform also the function of a DM-REP, DM-GATE or DM-REP/GATE (in which case it is designated as an M-DM-REP, M-DM-GATE or M-DM-REP/GATE respectively). The authorization signal broadcast by an M-DM-AUTH is the direct mode presence signal. For an M-DM-REP, M-DM-GATE or M-DM-REP/GATE, this is the DM-REP or gateway presence signal defined in EN 300 396-4 [4] and ETS 300 396-5 [5]. The authorization presence signal for a stand-alone M-DM-AUTH is defined in clause 8.3.1. The authorization presence signal is a signalling message transmitted by the M-DM-AUTH on the managed RF carrier. It indicates to any M-DM-MSs monitoring the RF carrier that the M-DM-AUTH is within range. It also indicates which M-DM-MSs are authorized to transmit on the RF carrier, and the validity time for which those M-DM-MSs are authorized. The authorization presence signal authorizes transmission by the indicated M-DM-MSs on the RF carrier on which the signal is sent (except in the case of a two-frequency M-DM-REP or M-DM-REP/GATE (see clause 7.1)). SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 11 The authorization presence signal is not sent during direct MS-MS calls. Therefore, a stand-alone M-DM-AUTH sends the authorization presence signal only when the channel is free. An M-DM-REP, M-DM-GATE or M-DM-REP/GATE sends the authorization presence signal when the channel is free; it also sends the authorization presence signal during calls made through that repeater or gateway, as defined in EN 300 396-4 [4] and ETS 300 396-5 [5]. An example of a scenario in which M-DMO works is shown in figure 1. The example shows direct MS-MS operation authorized by a stand-alone M-DM-AUTH. The M-DM-AUTH has received its authorization to transmit the authorization presence signal on the DM RF carrier from an M-DMO management station, using the V+D Short Data Service Transport Layer (SDS-TL) data transfer service. SwMIM-DMOmanagementstationM-DM-AUTHDMO-NET (part 3)Authorizingpresence signal
Authorization using SDS-TL
EN 300 392-2 Figure 1: M-DMO Operational scenario The normal sequence of events for an M-DM-MS authorized by an M-DM-AUTH is as shown in the simplified message sequence chart of figure 2 and described in the following text. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 12 M_DM_MSM_DM_AUTH11ALT1AuthorizedToTransmitAddressCheckNotAuthorizedToTransmitMSCMDMO_Authorization_OverviewM_DMO_PRESENCE_SIGNAL(AuthorizedAddress, ValidityTime) Figure 2: M-DMO authorization sequence chart 1) Power up on M-DMO RF carrier. 2) Inhibit transmission path (including transmission for linearization). 3) Scan RF carrier for activity. 4) If activity is detected, determine whether activity is direct mode presence signal (DPRES-SYNC PDU). 5) If yes, determine whether it is an M-DMO presence signal (i.e. M-DMO flag set to 1). 6) If yes, compare own addresses with authorized addresses (indicated by process box marked "AddressCheck" on figure 2): - if any address is equal then the transmission path may be enabled on this RF carrier for the indicated validity time (as shown in upper ALT path of figure 2); - if not equal then the state of the transmission path on this RF carrier shall not be changed (as shown in lower ALT path of figure 2). 7) Return to 3. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 13 5 M-DM-MS 5.1 Operation of M-DM-MS Mobile stations used for Managed Direct Mode Operation (M-DMO) may be considered as a variant of those used for Direct Mode operation as described in: - ETS 300 396-3 [3] for direct DM-MS to DM-MS operation; - EN 300 396-4 [4] for DM-MS to DM-MS operation through a type 1 DM-REP; - ETS 300 396-5 [5] for DM-MS to/from V+D operation through a gateway; and - EN 300 396-7 [7] for DM-MS to DM-MS operation through a type 2 DM-REP. The differences from ETS 300 396-3 [3], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7] operation described in the present document relate principally to the permission to transmit - though some other differences also apply. The addressing methods of DMO described in ETS 300 396-1 [1], clause 6 shall apply to M-DMO. The radio aspects of DMO described in EN 300 396-2 [2], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7] shall apply to M-DMO. The security aspects of DMO described in ETS 300 396-6 [6] shall apply to M-DMO. There are two distinct methods for authorization of an M-DM-MS: a) the M-DM-MS may receive authorization from an M-DM-AUTH transmitting on the managed RF carrier; or b) the M-DM-MS may receive authorization directly from an authorizing V+D SwMI or from an M-DMO management station via the V+D network. These methods are described in clauses 5.2 and 5.3 respectively. An M-DM-MS shall use either the method described in clause 5.2 or the method described in clause 5.3. 5.2 M-DM-MS authorized by M-DM-AUTH In this type of operation, the M-DM-MS receives authorization from an M-DM-AUTH transmitting on the managed RF carrier. The M-DM-MS shall not transmit on the managed RF carrier unless it has received an authorization presence signal indicating one of its addresses and the validity time has not expired.
The M-DM-MS's authorization to transmit is based only on the validity time from the most recently received presence signal that authorized the M-DM-MS to use the RF carrier. The authorization for that validity time applies even if the M-DM-MS goes out of range of the M-DM-AUTH.
The M-DM-MS's authorization relates to any type of transmission on the RF carrier (e.g. for a circuit mode call, SDS message etc). Reception is allowed always. Thus, as an option, an M-DM-MS may receive calls while it is not authorized to transmit, though it is not permitted to respond or request to transmit in the call. The authorization presence signal is described in clause 8. The protocol differences for the M-DM-MS relative to the specifications provided in ETS 300 396-3 [3], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7] are described in annexes B, C, D and E. NOTE: Methods for selection of the appropriate RF carrier by the M-DM-MS are not defined in the present document. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 14 5.3 V+D authorized M-DM-MS There is an alternative type of M-DM-MS. This is: 1) a Dual Watch MS; or
2) a Dual Mode MS with a means for determining its geographical location (e.g. a GPS receiver), that receives its authorization directly from an authorizing SwMI or from an M-DMO management station via the V+D network. This type of M-DM-MS appears to the authorizing SwMI or management station to be similar to an M-DM-AUTH but is restricted to obtaining authorization only for itself. Such an M-DM-MS shall not broadcast an authorization presence signal on any M-DMO RF carrier but may make calls whilst its authorization on the RF carrier is valid. This type of M-DM-MS is referred to in the present document as a V+D authorized M-DM-MS. In this type of operation, the M-DM-MS's authorization to transmit on the RF carrier is constrained by the authorization duration received from the authorizing SwMI or management station. It is also constrained by the M-DM-MS's location, as described in the following two paragraphs.
In case 1), the Dual Watch MS may transmit on the managed RF carrier while it is in range of the TETRA SwMI and in receipt of signalling from the SwMI and the authorization time has not expired. In some cases this link will be lost due to the variability of RF path conditions. If the link to the SwMI is lost for longer than a time MT201, the MS shall inhibit transmission on the managed RF carrier (see clause 5.4.2).
In case 2), the Dual Mode MS receives information about the authorized geographical area from the authorizing SwMI or management station when it receives the authorization to use the managed RF carrier; this information is defined in terms of a geographical point (the authorization datum point) and the authorized range relative to that point. The Dual Mode MS shall be able to calculate its geographical location and its distance in metres from its authorization datum point. The MS may transmit on the managed RF carrier while it is within the defined range from the authorization datum point and the authorization time has not expired. Transmission shall be inhibited when the defined range from the authorization datum point is exceeded (see clause 5.4.2). The MS may re-enable transmission if it returns to a location within the defined range from the authorization datum point (provided that the authorization time has not expired). It is a requirement of this mode that the source of the geographical location data is trusted. The means by which this trust is maintained is outside the scope of the present document. Reception is allowed always. Thus, as an option, the M-DM-MS may receive calls while it is not authorized to transmit, though it is not permitted to respond or request to transmit in the call. The protocol differences for a V+D authorized M-DM-MS relative to the specifications provided in ETS 300 396-3 [3], EN 300 396-4 [4], ETS 300 396-5 [5] and EN 300 396-7 [7] are described in annex F. Unless specified otherwise, the procedures defined for a M-DM-MS in the remainder of the present document apply only to an M-DM-MS that is authorized by an M-DM-AUTH, not to a V+D authorized M-DM-MS. NOTE: A V+D authorized M-DM-MS receives its authorization to use the managed RF carrier directly from the SwMI or from an M-DMO management station via the V+D network. It does not need to receive an authorization presence signal on the managed RF carrier. I.e. a V+D authorized M-DM-MS does not need an M-DM-AUTH to be present on the managed RF carrier. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 15 5.4 Transmit authorization for M-DM-MS 5.4.1 Transmit authorization for M-DM-MS authorized by M-DM-AUTH The authorization signal shall be processed by the M-DM-MS in accordance with the simplified state machine illustrated in figure 3 and the following text. Process M_DMO * Authorization Set T_Valid Allow Tx - T_Valid Inhibit Tx
Figure 3: Simplified state machine of M-DMO in an M-DM-MS The action "Set T_Valid" in figure 3 means that the M-DM-MS shall set timer T_Valid to the validity time contained in the authorizing presence signal. The state machine of the M-DM-MS shall be implemented such that transmission shall only be allowed when the timer T_Valid has not expired. If T_Valid has expired or does not exist, transmission shall be inhibited. The following procedures shall apply when timer T_Valid expires: a) If the M-DM-MS is in the process of transmitting a burst, the transmission of that burst shall be completed before transmission is inhibited. b) If the M-DM-MS is currently sending a short data message, it may complete the current transmission of the short data message before transmission is inhibited. SIST EN 300 396-10 V1.1.2:2003

ETSI ETSI EN 300 396-10 V1.1.2 (2002-08) 16 c) If the M-DM-MS is currently master during a circuit mode call, the DMCC in the M-DM-MS shall immediately send a DM-RELEASE PDU to the called DM-MS(s), stop timer DT311 (if in occupation), inform the user application with a DMCC-RELEASE indication primitive and return to state IDLE. The DM-MAC shall send the DM-RELEASE message in at least two frames before transmission is inhibited. d) Otherwise the M-DM-MS shall inhibit transmission immediately.
NOTE: If the M-DM-MS is attempting random access when timer T_Valid expires, the M-DM-MS inhibits transmission immediately - unless it is actually in the process of transmitting a request, in which case it inhibits transmission immediately after the end of the DSB containing that request. In case c), the DMCC in the M-DM-MS should set the "release cause" element in the DM-RELEASE PDU to "transmit capability lost" (see clause 5.4.3) and should set the "release cause" parameter in the DMCC-RELEASE indication primitive to a new value "transmit authorization lost".
5.4.2 Transmit authorization for V+D authorized M-DM-MS The state machine of a V+D authorized M-DM-MS shall be implemented such that transmission shall only be allowed when the authorization time indicated by the authorizing SwMI or management station has not expired and: - for a Dual Watch M-DM-MS, the link to the SwMI has not been lost (i.e. timer MT201 has not expired); or - for a Dual Mode M-DM-MS, the MS is within the defined range from the authorization datum point. For a Dual Watch M-DM-MS, procedures a), b), c) and d) of clause 5.4.1 shall apply when the authorization time or timer MT201 expires.
For a Dual Mode M-DM-MS, procedures a), b), c) and d) of clause 5.4.1 shall apply when the authorization time expires or the defined range from the authorization datum point is exceeded. 5.4.3 Release cause element The "release cause" element in the DM-RELEASE PDU may take an additional value as shown in table 1. Table 1: Release cause element Information element Length Value Remark Release cause
4 00002 to 01102 As defined in ETS 300 396-3 [3]
01112 As defined in EN 300 396-4 [4]
10002 to 11002 As defined in ETS 300 396-5 [5]
11012 Transmit capability lost
others Reserved
6 M-DM-AUTH 6.1 Operation o
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