SIST ETS 300 133-4 E2:2003

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YPHVQLNDElectroMagnetic Compatibility and Radio Spectrum Matters (ERM); Enhanced Radio Messaging System (ERMES); Part 4: Air interface specification33.100.01Elektromagnetna združljivost na splošnoElectromagnetic compatibility in general33.070.20Sistem za osebni klicPaging systemsICS:Ta slovenski standard je istoveten z:ETS 300 133-4 Edition 2SIST ETS 300 133-4 E2:2003en01-december-2003SIST ETS 300 133-4 E2:2003SLOVENSKI
STANDARD



SIST ETS 300 133-4 E2:2003



EUROPEAN ETS 300 133-4TELECOMMUNICATION November 1997STANDARD Second EditionSource: ERM Reference: RE/ERM-RP04-007-4ICS:33.020Key words:Air interface, ERMES, paging, radioElectromagnetic compatibilityand Radio spectrum Matters (ERM);Enhanced Radio MEssage System (ERMES);Part 4: Air interface specificationETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: secretariat@etsi.frTel.: +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 1997. All rights reserved.SIST ETS 300 133-4 E2:2003



Page 2ETS 300 133-4: November 1997Whilst 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 300 133-4 E2:2003



Page 3ETS 300 133-4: November 1997ContentsForeword.5Intellectual Property Rights.61Scope.72Normative references.73Definitions, abbreviations and symbols.73.1Definitions.73.2Abbreviations.93.3Symbols.104Transmission protocol.104.1General description of the protocol.104.2Outline of the air interface model.124.2.1Information format L4.124.2.2Error correction coding L3.124.2.3Codeword interleaving L2.124.2.4Modulation L1.124.3Application of the model to the air interface.124.4Batch structure.124.5Subsequence lengths.144.6Version compatibility.144.6.1Compatibility mechanism.144.6.2Earlier versions.144.6.3Compatibility matrix.145Information format.145.1General.145.2Synchronization partition.155.3System information partition.155.3.1System information.155.3.1.1Format of the network information.155.3.1.2Format of the time slot information.165.3.2Supplementary system information.165.3.2.1Transmission of different SSIT values on a channel.165.3.2.2Supplementary system information field (SSIT = 0000).175.3.2.3Supplementary system information field (SSIT = 0001).175.3.2.4Supplementary system information field (SSIT = 0010).175.3.2.5Supplementary system information field (SSIT = 1101).185.3.2.6Supplementary system information field (SSIT = 1110).185.3.2.7Supplementary system information field (SSIT = 1111).185.4Address partition.185.5Message partition.185.5.1Message header.185.5.1.1Variable Information Field (VIF) (AII = 0).195.5.1.2Variable Information Field (VIF) (AII = 1).195.5.1.2.1Long messages (AII = 1, AIT = 000,001, 101 or 110).205.5.1.2.2Remote programming of pagerparameters (AII = 1, AIT = 010).215.5.1.2.3Miscellaneous (AII = 1, AIT = 100).225.5.1.2.4Common temporary address pointers(AII = 1, AIT = 111).225.5.2Additional information and external operator identity.225.5.3Message data.22SIST ETS 300 133-4 E2:2003



Page 4ETS 300 133-4: November 19975.5.4Message data.225.5.5Message delimiter.235.5.6Completion of message codeblocks.235.5.7Unused codeblocks.236Error correction coding.247Codeword interleaving.258Modulation.258.1General.258.2RF channels and channel numbering.258.3Modulation format.268.3.1Symbol alphabet.268.3.2Data rate and symbol rate.268.3.3Premodulation pulse shaping.278.3.4Paging receiver performance.288.3.5Transmitter performance.289Operation of the radio subsystem.289.1General.289.2Frequency subset indicator and frequency subset number.299.3Border area indicator.309.4External traffic indicator.309.5Examples of receiver operation.309.5.1Non-locking receivers.309.5.2Locking receiver.3110Paging message procedures on the air interface.3110.1General.3110.2Individual call procedure.3110.3Group call procedure.3210.4Handling of long messages.3310.5Messages continued in further batches in the same subsequence.3410.6Messages continued in further subsequences.3410.7Transmission of variable receiver parameters.3410.8Termination of message search.3410.8.1Individual calls.3410.8.2Group calls.3511Battery saving techniques.3511.1Batch level.3511.2Subsequence level.3511.3Cycle level.3511.4Sequence level.3612Synchronization.3612.1General.3612.2Synchronization between paging receiver and radio transmission.3612.3Synchronization between base stations.3712.4Co-ordination between networks.37History.38SIST ETS 300 133-4 E2:2003



Page 5ETS 300 133-4: November 1997ForewordThis second edition European Telecommunication Standard (ETS) has been produced by theElectromagnetic compatibility and Radio spectrum Matters (ERM) Technical Committee of the EuropeanTelecommunications Standards Institute (ETSI).This ETS comprises seven parts with the generic title "Electromagnetic compatibility and Radio spectrumMatters (ERM); Enhanced Radio MEssage System (ERMES)". The title of each part is listed below:Part 1:"General aspects";Part 2:"Service aspects";Part 3:"Network aspects";Part 4:"Air interface specification";Part 5:"Receiver conformance specification";Part 6:"Base station specification";Part 7:"Operation and maintenance aspects".This part, ETS 300 133-4, specifies the radio subsystem aspects including:-the transmission protocol and its operation;-modulation characteristics;-channel coding;-quasi-synchronous operation;-receiver battery saving techniques.NOTE:In this part of ETS 300 133, some protocol bits have been "reserved for futuredefinition". It is intended that these bits will be allocated for specific options in a futureenhanced version of this ETS.Suggestions for potential enhancements to the protocol using these bits should becommunicated via the normal ETS maintenance procedures to the ETSI Secretariat atthe address given on the title page.Transposition datesDate of adoption:7 November 1997Date of latest announcement of this ETS (doa):28 February 1998Date of latest publication of new National Standardor endorsement of this ETS (dop/e):31 August 1998Date of withdrawal of any conflicting National Standard (dow):31 August 1998SIST ETS 300 133-4 E2:2003



Page 6ETS 300 133-4: November 1997Intellectual Property RightsIPRs essential or potentially essential to this ETS may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, andcan be found in ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRsnotified to ETSI in respect of ETSI standards", which is available free of charge from the ETSISecretariat. Latest updates are available on the ETSI Web server (http://www.etsi.fr/ipr).Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out byETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or theupdates on http://www.etsi.fr/ipr) which are, or may be, or may become, essential to this ETS.SIST ETS 300 133-4 E2:2003



Page 7ETS 300 133-4: November 19971ScopeThis European Telecommunication Standard (ETS), describes the requirements for air interfacespecification of the Electromagnetic compatibility and Radio spectrum Matters (ERM) Enhanced RadioMEssage System (ERMES). All aspects of the radio subsystem are defined including the transmissionprotocol, information format, channel coding and modulation characteristics. Operation of the radiosubsystem and procedures on the air interface are defined and described.2Normative referencesThis ETS incorporates by dated or 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 300 133-2 (1997): "Radio Equipment and Systems (RES); Enhanced RadioMEssage System (ERMES) Part 2: Service aspects".[2]ETS 300 133-5: (1997): "Radio Equipment and Systems (RES); EnhancedRadio MEssage System (ERMES) Part 5: Receiver conformance specification".[3]ETS 300 133-6: (1997): "Radio Equipment and Systems (RES); EnhancedRadio MEssage System (ERMES) Part 6: Base station conformancespecification".[4]ITU-T Recommendation E.212: "Identification plan for land mobile stations".[5]CEPT Recommendation T/R 25-07: "Frequency co-ordination for the EnhancedRadio MEssage system (ERMES)".[6]ETS 300 133-1: "Electromagnetic compatibility and Radio spectrum Matters(ERM); Enhanced Radio MEssage System (ERMES); Part 1: General aspects".3Definitions, abbreviations and symbols3.1DefinitionsFor the purposes of this ETS, the following definitions apply:associated operator: One of the network operators with which the home operator has an agreement toexclusively transfer calls.basic Radio Identity Code (RIC): The prime identity of a paging receiver allocated by the networkoperator when service is initiated. It can not be changed without safeguards against unauthorizedchanges.batch number: The 4 bit number corresponding to a particular batch type. Batch type A corresponds tobatch number 0000. Batch type P corresponds to batch number 1111.batch type: The letter (A to P) which identifies one of the 16 batches within a subsequence.character set indicator: Indicates which additional character set is to be used. The basic set defined inETS 300 133-2 [1], table B.3, is 00000.codeblock: Nine codewords interleaved as a unit as used in the message partition.codeword: The standard information unit of 30 bits length.country code: Binary representation of the country number defined in ITU-T Recommendation E.212 [4],annex A. The country code consists of 7 bits (see subclause 5.3.1.1).SIST ETS 300 133-4 E2:2003



Page 8ETS 300 133-4: November 1997End Of Message (EOM) character: A specific character used to indicate the end of an alphanumericmessage. It corresponds to DC1 as defined in clause B.3 of ETS 300 133-2 [1].external receiver: A receiver operating in a network which is not its home network.frequency divided network: A network that uses different frequency channels in adjacent paging areas.geographical area: One or several paging areas in an operator network. Defined by agreements betweennetwork operators for inter-network roaming or by a single operator for roaming within his own network. Itis used for roaming and choice of destination supplementary services.home network: The operator network with which a mobile subscriber has signed a subscription.home operator: The network operator to which a specific user has subscribed.initial address: The 18 most significant bits of the local address.I1 interface: The radio interface between the base stations and the paging receivers.I1 version number: The version number of the I1 interface. It consists of the Main Version Number(MVR1) and the Sub Version Number (SVR1) and is defined in ETS 300 133-1, annex B [6].I2 interface: An interface between the Paging Area Controller and the Base Station (BS).local address: The number used by a network to identify the receivers subscribed to it. It consists of22 bits. The four least significant bits of the local address denote the batch number of the receiver.long message: A message that has been split into two or more parts (sub-messages) for transmission.operator code: The number used by the system on the radio path to identify an operator within a country.It consists of 3 bits.operator identity: The number used by the system on the radio path to identify the home operator of areceiver. It has a total length of 13 bits and consists of three parts, the zone code, the country code andthe operator code.paging area: The area controlled by a Paging Area Controller (PAC). It is the minimum area to which amobile subscriber is permitted to subscribe in order to receive his paging messages.paging area code: The number used by the system to identify the paging area.paging area controller: Functional entity controlling the base stations within one paging area.paging message: The tone-only, numeric, alpha-numeric or transparent data information sent to a pagingreceiver.paging signal: The signal sent on the radio path to a paging receiver.radio identity code: The number used by the system on the radio path to identify the receiver(s) forwhich the paging message is intended. The RIC has a total length of 35 bits and consists of five parts: thezone code (3 bits), the country code (7 bits), the operator code (3 bits), the initial address (18 bits) and thebatch number (4 bits).Operator IdentityLocal AddressZoneCountryOperatorInitialBatchcodecodeCodeaddressnumberNo. of bits373184Figure 1: Radio identity codeSIST ETS 300 133-4 E2:2003



Page 9ETS 300 133-4: November 1997reserved for future definition: The bits indicated are not specified in this edition of the standard but maybe in future editions. The bits should be set to a default value of zero and not used to convey information.The function of any equipment is independent of these bits. No fixed pattern of reserved bits should beassumed and no combination of reserved bits should cause equipment to malfunction.roaming area: The geographical area where the mobile subscriber asks for his messages to betransmitted when he uses the roaming service.service area: The paging area(s) to which the mobile subscriber has subscribed and in which a pagingmessage will normally be transmitted.sub-message: Part of a long message. All sub-messages of any one long message carry the samemessage number.symbol: Two bits of information which are the basic unit of information on the air interface. It correspondsto one of the four modulation levels specified in subclause 8.3.1.time divided network: A network that uses the same frequency channel during different sub-sequences(periods of a time cycle) in adjacent paging areas.zone code: Binary representation of the zone number defined in ITU-T Recommendation E.212 [4],annex A. The zone code consists of 3 bits (see subclause 5.3.1.1).3.2AbbreviationsFor the purposes of this ETS, the following abbreviations apply:AIIAdditional Information IndicatorAIFAdditional Information FieldAINAdditional Information NumberAITAdditional Information TypeAPTAddress Partition TerminatorBAIBorder Area IndicatorBSBase StationCTACommon Temporary AddressCTAPCommon Temporary Address PointerEBExternal BitETIExternal Traffic IndicatorFSIFrequency Subset IndicatorFSNFrequency Subset NumberIAInitial AddressIVR1I1 version numberLSBLeast Significant BitMSBMost Significant BitMVR1I1 main version numberOPIDOperator IdentityPAPaging AreaPRPreamblePACPaging Area ControllerPAM/FMPulse Amplitude Modulated Frequency ModulationRFRadio FrequencyRICRadio Identity CodeRSVDReserved bits for future definitionSISystem InformationSMSubsequence MaskSSISupplementary System InformationSSIFSupplementary System Information FieldSSITSupplementary System Information TypeSSNSubsequence NumberSVR1I1 sub version numberSWSynchronization WordSYNSynchronization WordSYSSystem information partitionSIST ETS 300 133-4 E2:2003



Page 10ETS 300 133-4: November 1997UMIUrgent Message IndicatorUTCUniversal Time Co-ordinatedVIFVariable Information Field3.3SymbolsFor the purposes of this ETS, the following symbols apply:ENLNumber of Least Significant Bits (LSB) to be compared when operating outsidehome networkHNLNumber of LSBs to be compared when operating within home network4Transmission protocol4.1General description of the protocolThis ETS describes the version 02.01 of the air interface specification (I1).The structure of the basic transmission protocol on channel one (of channels numbered 1 - 16) isillustrated in figure 2.A sequence of 60 minutes total duration and comprising 60 cycles shall be provided. Sequences shall beco-ordinated with the Universal Time Co-ordinated (UTC) so that on the hour a new sequencecommences.A paging cycle of exactly one minute duration, co-ordinated with UTC, shall be used to allow thenecessary co-ordination between different networks. Receivers may listen to one or a few cycles in asequence in order to reduce battery consumption (see clause 11).Each cycle shall be divided into five subsequences commencing at 12 second intervals. To allowco-ordination between networks the Subsequence Number (SSN) = 0 subsequence shall always betransmitted first after the UTC minute marker.The transmission of a subsequence may end before the full 12 seconds has elapsed. The subsequencelength may be reduced by a small amount to allow for transmitter switching times. Occasionally a greaterreduction may be made in order that test or system transmissions can be made by individual transmitters.Each subsequence shall be further divided into 16 batches labelled A-P. The receiver population shouldbe divided into 16 groups and each receiver allocated to one of the 16 batch types according to the 4 leastsignificant bits of its basic RIC. Further RICs used by this receiver shall be of the same batch type.Each receiver shall only be initially addressed in its own batch type transmission. When the receiverdetects its initial address it should wait on the same channel for the message to be sent. The messagemay be sent in the same batch, in any subsequent batch of the same subsequence or in the followingsubsequence (see subclause 10.6 regarding time-out conditions).An initial address may be transmitted more than once in the same batch (see subclause 10.2).The time of transmission of a particular batch type on each frequency channel is shifted by a single timebatch with respect to the others as shown in figure 3. Consequently a receiver can, if necessary, stepthrough the paging frequency channels without losing any messages.The first fifteen batches in every subsequence shall have length 154 codewords. The final batch in everysubsequence shall have length 190 codewords. This is so that messages in time divided networks may becompleted within a subsequence.Each batch is further subdivided into four partitions. These are the synchronization, system information,address and message partitions. A detailed description of the batch structure is given in subclause 4.4and the contents of each partition specified in subclauses 5.2 to 5.5.SIST ETS 300 133-4 E2:2003



Page 11ETS 300 133-4: November 1997System Inform.partitionAddresspartitionMessagepartitionSynchroniationpartitionzSEQUENCE60 minutes60 cyclesCYCLE1 minute5 subsequenceSUBSEQUENCE12 seconds16 batchesBATCHFigure 2: Structure of the radio protocol on channel oneBBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCCDEFDEFDEFDEFDEFDEFDEFDEFDEFDEFDEFDDDDEEEEEDFFFFFGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIJGHIGHGHIJIJJKLMKLMKLMKLMKLMKLMKLMKLMKLMKLMKLMKLMKLMKLMKLKLMMNOPNOPNOPNOPNOPNOPNOPNOPNOPNOPNOPNOPNOPNOPOPPNONBBBBBBBBBBBBCCCCCCCCCCCCDEFDEFDEFDEFDEFDEFDEDDEFDDEEEEDFFFFFGHIJGHIJGHIJGHIGHGGHIJGHIJGHIJGHIJGHIJGHIJHIJIJJKLKKLMKLMKLMKLMKLMKLMKLMKLMKLMKLMLMMNNONOPNOPNOPNOPNOPNOPNOPNOPNOPNOPOPP02040608101214160115131109070503Chan12 seconds= Active batch for a type A receiverNOTE:The relation between Radio Frequency (RF) channel frequencies and channel numbers isdefined in subclause 8.2.Figure 3: Channel synchronization and the scanning procedureSIST ETS 300 133-4 E2:2003



Page 12ETS 300 133-4: November 19974.2Outline of the air interface modelThe air interface transmissions are organized in four levels:L4 - information format;L3 - error correction coding;L2 - codeword interleaving;L1 - modulation.4.2.1Information format L4Co-ordination of the basic paging system data and paging message data is performed at the formatinformation level. It is a way of arranging the transmitted data in a predefined format that will berecognized by the receivers.Throughout this ETS the bit transmission order shall be from left to right. Accordingly the Most SignificantBit (MSB), which is the left most bit, is transmitted first. The Least Significant Bit (LSB) is the right most bitand is transmitted last.4.2.2Error correction coding L3Forward error correction coding adds redundancy to the transmitted codewords so that after demodulationand de-interleaving transmission errors may be detected and corrected.4.2.3Codeword interleaving L2Interleaving is the technique to spread burst errors that occur on radio channels subject tomultipath/fading and impulsive noise. This is achieved by changing the order of bits in the transmitted datastream so that on reception any burst of errors that has occurred is spread over several codewords andthere is a chance that some or all of them may be corrected. This is further described in clause 7.4.2.4Modulation L1The function of the modulation level is to distribute by radio transmission the coded and formattedinformation from the base station transmitters to the paging receivers.4.3Application of the model to the air interfaceEach of the processing levels will be described in detail in the following clauses. Not all levels shall beapplied to all parts of the interface transmissions. This is best specified at the batch level (see figure 2)where the following shall apply:-synchronization partition: L1 & L4;-system information partition: L1, L3 & L4;-address partition: L1, L3 and L4;-message partition: L1, L2, L3 and L4.4.4Batch structureThe synchronization partition and system information partition are of fixed length. The boundary betweenthe address and message partitions can be altered depending on traffic type and density. The requirementfor
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