SIST ETS 300 396-2:1999

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 2: Radio aspects33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)33.020Telekomunikacije na splošnoTelecommunications in generalICS:Ta slovenski standard je istoveten z:ETS 300 396-2 E13SIST ETS 300 396-2:1999en01-MXOLM19993SIST ETS 300 396-2:1999SLOVENSKI
STANDARD



SIST ETS 300 396-2:1999



EUROPEANETS 300 396-2TELECOMMUNICATIONMarch 1998STANDARDSource: TETRAReference: DE/RES-06007-2ICS:33.020Key words:Air interface, TETRA, radioTerrestrial Trunked Radio (TETRA);Technical requirements for Direct Mode Operation (DMO);Part 2: Radio aspectsETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEInternet: secretariat@etsi.fr - http://www.etsi.fr - http://www.etsi.orgTel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1998. All rights reserved.SIST ETS 300 396-2:1999



Page 2ETS 300 396-2: March 1998Whilst 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.SIST ETS 300 396-2:1999



Page 3ETS 300 396-2: March 1998ContentsForeword.71Scope.92Normative references.93Definitions and abbreviations.93.1Definitions.93.2Abbreviations.104Radio aspects.114.1Introduction.114.2Set of logical channels.114.3Reference configuration.114.4Error control schemes.114.5Timeslot structure.124.5.1Framing structure.124.5.2Timeslots and bursts.124.5.3Mapping of logical channels onto physical channels.124.6Coding, interleaving and scrambling.124.7Modulation.134.8Transmission and reception.134.9Other radio-related functions.134.10Performance.135Modulation.135.1Introduction.135.2Modulation type.135.3Modulation rate.135.4Modulation symbol definition.135.5Modulated signal definition.145.6Modulation filter definition.155.7Modulation block diagram.156Radio transmission and reception.156.1Introduction.156.2Frequency bands and channel arrangement.156.3Reference test planes.166.4Transmitter characteristics.166.4.1Output power.166.4.2Power classes.166.4.3Unwanted conducted emissions.166.4.3.1Definitions.166.4.3.2Unwanted emissions close to the carrier.176.4.3.2.1Emissions during the useful part of theburst.176.4.3.2.2Emissions during the switchingtransients.176.4.3.3Unwanted emissions far from the carrier.176.4.3.3.1Discrete spurious.176.4.3.3.2Wideband noise.176.4.3.4Unwanted emissions during the Linearisation CHannel(LCH).186.4.3.5Unwanted emissions in the non-transmit state.186.4.4Unwanted radiated emissions.186.4.5Radio frequency tolerance.196.4.6RF output power time mask.19SIST ETS 300 396-2:1999



Page 4ETS 300 396-2: March 19986.4.7Transmitter intermodulation attenuation.206.4.7.1Definition.206.4.7.2Specification.206.5Receiver characteristics.206.5.1Blocking characteristics.206.5.1.1Definition.206.5.1.2Specification.206.5.2Spurious response rejection.216.5.2.1Definition.216.5.2.2Specification.216.5.3Intermodulation response rejection.216.5.3.1Definition.216.5.3.2Specification.226.5.4Unwanted conducted emissions.226.5.4.1Definition.226.5.4.2Specification.226.5.5Unwanted radiated emissions.226.6Transmitter/receiver performance.226.6.1Modulation accuracy.226.6.1.1Ideal case.226.6.1.2Vector error magnitude requirement at symbol time.236.6.2Receiver performance.246.6.2.1Nominal error rates.246.6.2.2Dynamic reference sensitivity.246.6.2.3Receiver performance at reference interference ratios.256.6.2.4Static reference sensitivity.256.6.2.5MS receiver performance for acquisition ofsynchronization burst.266.6.3Propagation conditions.266.6.3.1Tap-gain process types.266.6.3.2DM propagation models.277Radio sub-system synchronization.277.1Introduction.277.2Definitions and general requirements for synchronization of DM-MSs.277.3Timebase counters.287.3.1Definition of counters.287.3.2Relationship between the counters.287.4Requirements for the frequency source of DM mobiles.287.5Requirements for the synchronization of a slave DM mobile.297.6Synchronization requirements for a master MS operating on channel B in frequencyefficient mode.298Channel coding and scrambling.298.1Introduction.298.2General.308.2.1Interfaces in the error control structure.308.2.2Notation.318.2.3Definition of error control codes.318.2.3.116-state Rate-Compatible Punctured Convolutional(RCPC) codes.318.2.3.1.1Encoding by the 16-state mother codeof rate 1/4.328.2.3.1.2Puncturing of the mother code.328.2.3.1.3Puncturing scheme of the RCPC codeof rate 2/3.328.2.3.1.4Puncturing scheme of the RCPC codeof rate 292/432.328.2.3.1.5Puncturing scheme of the RCPC codeof rate 148/432.338.2.3.2(K1 + 16, K1) block code.338.2.4Definition of interleaving schemes.338.2.4.1Block interleaving.33SIST ETS 300 396-2:1999



Page 5ETS 300 396-2: March 19988.2.4.2Interleaving over N blocks.338.2.5Definition of scrambling.348.2.5.1Scrambling method.348.2.5.2Scrambling sequence.348.3Error control schemes.348.3.1Signalling channels.358.3.1.1Synchronization Signalling CHannel (SCH/S).358.3.1.2Half-slot Signalling CHannel (SCH/H) and StealingCHannel (STCH).368.3.1.3Full-slot Signalling CHannel (SCH/F).368.3.2Traffic channels in circuit switched mode.378.3.2.1Traffic channel, net rate = 7,2 kbit/s (TCH/7,2).378.3.2.2Traffic channel, net rate = 4,8 kbit/s (TCH/4,8).388.3.2.3Traffic channel, net rate = 2,4 kbit/s (TCH/2,4).398.3.2.4Speech Traffic Channel, full slot (TCH/S).398.3.2.5Speech Traffic Channel, half slot (TCH/S).409Channel multiplexing for DM.409.1Introduction.409.2Logical channels.409.2.1Logical channels hierarchy.409.2.2Traffic channels.409.2.3Control channels.419.2.3.1General.419.2.3.2Linearization CHannel (LCH).419.2.3.3Signalling CHannel (SCH).419.2.3.4STealing CHannel (STCH).419.3The physical resource.419.3.1General.419.3.2Timeslots.429.3.3DM frame.429.3.4Multiframe.429.4Physical channels.429.4.1General.429.4.2Bursts.429.4.2.1General.429.4.2.2Modulation symbol numbering.429.4.2.3Modulation bit numbering.429.4.2.4Burst timing.429.4.3Type of bursts.439.4.3.1General.439.4.3.2Modulation bits allocation.439.4.3.2.1DM Normal Burst (DNB).449.4.3.2.2DM Linearization Burst (DLB).449.4.3.2.3DM Synchronization Burst (DSB).449.4.3.3Burst fields.449.4.3.3.1Frequency correction field.449.4.3.3.2Inter-slot frequency correction field.459.4.3.3.3Normal training sequence andpreamble.459.4.3.3.4Synchronization training sequence.459.4.3.3.5Phase adjustment bits.469.4.3.3.6Tail bits.469.4.4DM-MS multiple slot transmission.469.4.5General mapping of logical channels.4710Radio subsystem link control.4710.1Introduction.4710.2RF power control.4710.3Radio link measurements.4710.3.1Signal strength.4710.3.2Signal quality.47SIST ETS 300 396-2:1999



Page 6ETS 300 396-2: March 1998History.48SIST ETS 300 396-2:1999



Page 7ETS 300 396-2: March 1998ForewordThis European Telecommunication Standard (ETS) has been produced by the Terrestrial Trunked Radio(TETRA) Project of the European Telecommunications Standards Institute (ETSI).This ETS is a multi-Part standard and will consist of the following parts:Part 1:"General network design";Part 2:"Radio Aspects";Part 3:"Mobile Station to Mobile Station (MS-MS) Air Interface (AI) protocol";Part 4:"Repeaters ", (DE/RES-06007-4);Part 5:"Gateways", (DE/RES-06007-5);Part 6:"Security", (DE/RES-06007-6);Part 7:"Repeater type 2", (DE/TETRA-02007-7);Part 8:"PICS proforma", (DE/TETRA-02007-8);Part 9:"SDL model", (DE/TETRA-02007-9).Transposition datesDate of adoption of this ETS:6 March 1998Date of latest announcement of this ETS (doa):30 June 1998Date of latest publication of new National Standardor endorsement of this ETS (dop/e):31 December 1998Date of withdrawal of any conflicting National Standard (dow):31 December 1998SIST ETS 300 396-2:1999



Page 8ETS 300 396-2: March 1998Blank pageSIST ETS 300 396-2:1999



Page 9ETS 300 396-2: March 19981ScopeThis European Telecommunication Standard (ETS) defines the TErrestrial Trunked RAdio system(TETRA) Direct Mode Operation (DMO). It specifies the basic air interface, the inter-working betweenDirect Mode (DM) groups via repeaters, and inter-working with the TETRA Voice plus Data (V+D) systemvia gateways. It also specifies the security aspects in TETRA DMO, and the intrinsic services that aresupported in addition to the basic bearer and teleservices.This part applies to the TETRA DMO Mobile Station - Mobile Station (MS - MS) air interface and containsthe specifications of the physical layer according to the OSI seven layer reference model.It establishes the TETRA DM radio aspects (layer 1 and lower MAC):-it defines and specifies the modulation;-it defines and specifies the radio transmission and reception;-it defines and specifies the synchronization;-it defines and specifies the channel coding;-it defines and specifies the channel multiplexing;-it defines and specifies the control over the radio link.2Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies.[1]ETS 300 113: "Radio Equipment and Systems (RES); Land mobile service;Technical characteristics and test conditions for radio equipment intended forthe transmission of data (and speech) and having an antenna connector".[2]ETS 300 396-3: "Terrestrial Trunked Radio (TETRA); Technical requirementsfor Direct Mode Operation (DMO); Part 3: Mobile Station to Mobile Station(MS-MS) Air Interface (AI) protocol".[3]ETS 300 395-2: "Radio Equipment and Systems (RES); Trans-EuropeanTrunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 2:TETRA codec".3Definitions and abbreviations3.1DefinitionsFor the purposes of this ETS, the following definitions apply:Bit Error Ratio (BER): The ratio of the bits wrongly received to all bits received in a given logical channel.broadcast: A unidirectional point to multipoint mode of transmission.call transaction: All of the functions associated with a complete unidirectional transmission of informationduring a call. A call can be made up of one or more call transactions. In a simplex call these calltransactions are sequential.Direct Mode (DM): A mode of simplex operation where mobile subscriber radio units may communicateusing radio frequencies which may be monitored by but which are outside the control of the TETRATrunked network. DM is performed without intervention of any base station.SIST ETS 300 396-2:1999



Page 10ETS 300 396-2: March 1998Direct Mode Mobile Station (DM-MS): A physical grouping that contains all of the mobile equipment thatis used to obtain TETRA DM services. By definition, a Mobile Station contains at least oneMobile Radio Stack (MRS). For synchronization purposes, Direct Mode Mobile Stations can have one oftwo status levels:-Master: if the DM-MS is either active in a call transaction transmitting traffic or control data, or isreserving the channel by means of channel reservation signalling and hence is providingsynchronization information to the channel;-Slave: if the DM-MS is receiving traffic and/or signalling and hence is deriving synchronizationinformation from the channel.logical channel: A generic term for any distinct data path. Logical channels are considered to operatebetween logical endpoints.Message Erasure Rate (MER): The ratio of the messages detected as wrong by the receiver to allmessages received in a given logical channel.Probability Of Undetected Erroneous Message (PUEM): The limit ratio of the erroneous messagesdetected as right by the receiver to all messages received in a given logical channel.quarter symbol number: The timing of quarter symbol duration 125/9 µs within a burst.simplex: A mode of single or dual frequency working in which information can be transferred in bothdirections but not at the same time.timebase: A device which determines the timing state of signals transmitted by aDirect Mode Mobile Station.timeslot number: A counter indicating the timing of timeslots within a DMO frame.useful part of a burst: The part of the burst between and including the symbol time of SN0 and thesymbol time of Snmax, with SN0 and SNmax as defined in clause 9.3.2AbbreviationsFor the purposes of this ETS, the following abbreviations apply:AIAir InterfaceBERBit Error RatioBNBit NumberDLBDirect mode Linearization BurstDLLData Link LayerDM-MSDirect Mode Mobile StationDMODirect Mode OperationDNBDirect mode Normal BurstDQPSKDifferential Quaternary Shift KeyingDSBDirect mode Synchronization BurstFNFrame NumberLCHLinearization CHannelMERMessage Erasure RateMNMultiframe Numbermodmodulo (base for counting)MSMobile StationPACQProbability of synchronization burst ACQuisitionPUEMProbability of Undetected Erroneous MessageQNQuarter symbol NumberSCHSignalling CHannelSNSymbol NumberSTCHSTealing CHannelTCHTraffic CHannelTDMATime Division Multiple AccessSIST ETS 300 396-2:1999



Page 11ETS 300 396-2: March 1998TEITETRA Equipment IdentityTNTimeslot NumberV+DVoice plus Data4Radio aspects4.1IntroductionThis clause is an introduction to the radio aspects of the TETRA DMO standard. It consists of a generaldescription of the organization of the radio-related functions with reference to the clauses where each partis specified in detail. Furthermore, it introduces the reference configuration that will be used throughoutthis ETS.4.2Set of logical channelsThe radio subsystem provides a certain number of logical channels as defined in clause 9. The logicalchannels represent the interface between the protocol and the radio.4.3Reference configurationFor the purpose of elaborating the specification of the radio-related functions, a reference configuration ofthe transmission chain is used, as shown in figure 1. Only the transmission part is specified, the receiverbeing specified only via the overall performance requirements. With reference to this configuration, theclauses address the following functional units:-clause 5:differential encoding and modulation;-clause 6:characteristics of transmitter and receiver;-clause 8:coding, reordering and interleaving, and scrambling;-clause 9:burst building and logical channel multiplexing;-clause 10:radio link measurements.This reference configuration also defines a number of points of vocabulary in relation to the names of bitsat different levels in the configuration.RE-ORDERER ANDINTERLEAVERBLOCK ENCODERCONVOLUTIONALENCODERLOGICAL CHANNELMULTIPLEXER(1)(3)(2)(4)(5)(6)(7)(8)MODULATORDIFFERENTIALENCODER(1) type-1 information bits (transmit)(2) type-2 block encoded bits(3) type-3 convolutionally encoded bits(7) modulation bits(8) modulation symbolsSCRAMBLER(6) multiplexed bits(5) type-5 scrambled bits(4) type-4 re-ordered and interleaved bitsBURST BUILDERTRANSMITTERFigure 1: Reference configuration4.4Error control schemesThe different error control schemes are described in detail in clause 8.SIST ETS 300 396-2:1999



Page 12ETS 300 396-2: March 19984.5Timeslot structureThe carrier separation is 25 kHz.The basic radio resource is a timeslot lasting 14,167 ms (85/6 ms) and transmitting information at amodulation rate of 36 kbit/s. This means that the timeslot duration, including guard and ramping times, is510 bit (255 symbol) durations.The following subclauses briefly introduces the structures of multiframes, frames, timeslots and bursts, aswell as the mapping of the logical channels onto the physical channels. The appropriate specifications arefound in clause 9.4.5.1Framing structureA diagrammatic representation of the framing structure is shown in figure 2.3412173121 frame
= 4 timeslots ( ~
ms )1 multiframe
= 18 frames
( =
)1 time slot = 510 modulation bits durations
( ~
ms )1 modulation bit duration = 250/9
µs (~
µs)12350951845104control frame1,02 s27,7856,6714,167Figure 2: DM framing structureOne multiframe is subdivided into 18 frames, and has a duration of 1,02 s. The eighteenth frame in amultiframe is a control frame.One frame is subdivided into 4 timeslots, and has a duration of 170/3 » 56,67 ms.4.5.2Timeslots and burstsThe timeslot is a time interval of 85/6 » 14,167 ms, which corresponds to 255 symbol durations.The physical contents of a timeslot is carried by a burst. There are three different types of bursts, asdefined in clause 9.4.5.3Mapping of logical channels onto physical channelsThe mapping of the logical channels onto the physical channels, according to the mode of operation, isdefined in clause 9.4.6Coding, interleaving and scramblingThe coding, interleaving and scrambling schemes associated with each logical channel are specified inclause 8.SIST ETS 300 396-2:1999



Page 13ETS 300 396-2: March 19984.7ModulationThe modulation scheme is p/4-DQPSK (Differential Quaternary Phase-Shift Keying) with root-raisedcosine modulation filter and a roll-off factor of 0,35. The modulation rate is 36 kbit/s. This scheme isspecified in detail in clause 5.4.8Transmission and receptionThe modulated stream is transmitted on a radio frequency carrier.The specific RF channels, together with the requirements on the transmitter and the receivercharacteristics are specified in clause 6.DM-MS power classes are defined
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