SIST EN 301 124:1999

• Abstract:

  The scope of this work item covers the following point-to-multipoint (P-MP) applications: Voice, fax, voiceband data, Telex, Data up to 8 Mbit/s, ISDN. The main field of application of P-MP systems is to provide access to both public and private networks, particulary for remote subscribers. By means of P-MP systems the network service area may be extended to cover both distant and scattered subscriber locations. Subscribers to be offered a full range of services by the public/private network and to have access via various standard interfaces (2 wire loop, ISDN,....). The frequency bands above 3GHz are particularly suitable for the extension of telecomms. services to rural and suburban subscribers. P-MP systems provide standard network interfaces and transparently connect subscribers to the appropriate network node. These systems allow a service to be connected to a number of subscribers ranging from a few users to several hundred and over a range of distances. P-MP systems are generally, but not necessarily, configures as pre-assigned systems or as Demand Assigned Multiple Access (DAMA) radio systems. The essential features of a typical P-MP DAMA radio system are: - efficient use of the radio spectrum; - concentration; - transparency. Radio is often the ideal way of obtaining communications at low cost and almost independent of distance and difficult topography. Moreover a small number of sites are required for these installations thus facillitating rapid implementation and minimising maintenance requirements of the systems. Concentation means that m subscribers can share n radio channels (M being > n) allowing a better use to be made of the available frequency spectrum and at a lower equipment cost. The term multi-access derives from the fact that every subscriber has access to every channel (instead of a fixed assignment as in most multiplex systems). When a call is terminated the channel is released for another call. Concentration requires the use of

• Status: Published
• Publication Date: 31-Oct-1999
• ICS: 33.040.20 - Transmission systems
• ICS: 33.060.30 - Radio relay and fixed satellite communications systems
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Nov-1999
• Due Date: 01-Nov-1999
• Completion Date: 01-Nov-1999
• Ref Project: ETSI EN 301 124 V1.1.1 (1998-11) - Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); Direct Sequence Code Division Multiple Access (DS-CDMA) point-to-multipoint DRRS in frequency bands in the range 3 GHz to 11 GHz

SIST EN 301 124:1999 is the Slovenian adoption of ETSI EN 301 124 V1.1.1, a European Telecommunications standard for Direct Sequence Code Division Multiple Access (DS-CDMA) point-to-multipoint digital radio relay systems. It specifies the main system, radio, interface, power, and environmental characteristics for fixed access links in the 3 GHz to 11 GHz range, so manufacturers, network planners, and test labs can judge whether equipment is suited to voice, fax, data, telex, and ISDN access.

What does SIST EN 301 124:1999 specify?

SIST EN 301 124:1999 specifies requirements for point-to-multipoint (P-MP) DS-CDMA digital radio relay systems used in fixed service bands from 3 GHz to 11 GHz. The document is organized into scope, references, definitions, system architecture, radio characteristics, subscriber and network interfaces, and power supply and environmental conditions.

The scope covers typical access applications such as voice, fax, voiceband data, telex, data up to 2 Mbit/s, and ISDN. It is intended for access to public and private networks, including remote, scattered, urban, and rural subscribers. The document also states that there is no requirement for Central Station equipment from one manufacturer to operate with Terminal Station or Repeater Station equipment from another manufacturer.

What are the key requirements of SIST EN 301 124:1999?

SIST EN 301 124:1999 focuses on service transparency, declared radio loading, and measurable radio performance. In practice, it gives manufacturers and testers the limits they need to design, declare, and verify a P-MP system.

System behavior and transport

Clause 4 requires the system to support network performance and availability objectives, including the error performance guidance of ITU-T G.821 and the local-grade criteria of ITU-R F.697. The round trip delay for a single 64 kbit/s traffic channel shall not exceed 20 ms, which matters for telephone voice quality.

Clause 4 also requires transparency between exchange and subscriber equipment. The system should carry analogue or digital subscriber signals without the radio link being visible to the endpoints, and any voice coding used below 64 kbit/s must preserve equivalent quality. The coding method used has to be declared by the manufacturer.

Radio capacity and transmitter limits

Clause 5 says the document is generic and does not define specific frequency plans, but it applies to fixed service allocations in the 3 GHz to 11 GHz range. Channel spacing is linked to chip rate, and the manufacturer must declare the maximum system loading and the class of operation met. That declaration tells buyers how many simultaneous 64 kbit/s traffic channels the equipment can support under defined BER conditions.

The transmitter section sets limits for maximum average output power, ATPC, RTPC, spectrum mask, spurious emissions, and RF tolerance. These points matter because they determine whether the radio stays within spectral masks, power limits, and frequency accuracy when installed and tested.

Receiver and interference performance

Clause 5 also defines receiver dynamic range, CW interference rejection, BER thresholds, and interference sensitivity. The document distinguishes single-signal performance from loaded performance, and it uses declared classes and tables to relate BER to received signal level under maximum system loading.

Co-channel and adjacent-channel tests are included for like-modulated signals. In practice, this is what shows whether the system can coexist with other radio links in the same or neighboring channels.

Interfaces, power, and installation conditions

Clause 6 lists standardized subscriber and network interfaces such as analogue 2-wire, analogue 4-wire plus E & M, telex, digital data, ISDN basic rate, 2 Mbit/s, and V5.1/V5.2. Clause 7 covers power supply ranges for DC and AC equipment, environmental classes from ETS 300 019, and EMC conditions from ETS 300 385 or EN 300 339.

What terms does SIST EN 301 124:1999 define?

• P-MP - Point-to-MultiPoint, a radio access arrangement where one central station serves multiple terminal stations.
• DS-CDMA - Direct Sequence Code Division Multiple Access, a method where users share the same band using code sequences.
• DSSS modulation - Direct Sequence Spread Spectrum modulation, where data and a fixed chip sequence directly modulate the carrier.
• chip - A unit of modulation used in DSSS.
• system loading - The number of simultaneous 64 kbit/s traffic channels in one radio channel.
• maximum system loading - The declared number of simultaneous 64 kbit/s traffic channels the equipment supports for a given class.
• round trip delay - The total delay from one direction and back again between the defined reference points.
• ATPC - Automatic Transmit Power Control, a power control method that adjusts transmitted output automatically.

Who uses SIST EN 301 124:1999?

This standard is used by equipment manufacturers, radio system designers, test laboratories, and network operators working on fixed wireless access and telecoms transport. It is also relevant to buyers and quality managers who need to compare Central Station, Terminal Station, and Repeater Station equipment against the same technical baseline.

Which standards are used with SIST EN 301 124:1999?

SIST EN 301 124:1999 references several companion standards that define interfaces, environmental tests, and radio performance methods:

• ETS 300 012 - ISDN basic user-network interface layer 1.
• ITU-T G.703 - Physical and electrical characteristics of digital interfaces.
• ITU-T Q.552 / Q.553 - Analogue 2-wire and 4-wire interface characteristics.
• ITU-T G.821 and ITU-R F.697 - Error performance and availability objectives.
• ITU-T G.131 - Talker echo control.
• ITU-T G.773 - TMN interface protocol suites.
• ETS 300 019 - Environmental conditions and tests.
• ETS 300 385 and EN 300 339 - EMC conditions.
• EN 301 055 - Related DS-CDMA P-MP requirements for 1 GHz to 3 GHz bands.
• ERC Recommendations T/R 14-03, T/R 12-08, and T/R 12-05 - Harmonized frequency arrangements.
• CEPT/ERC Recommendation 74-01 - Spurious emissions.

What does the SIST EN 301 124:1999 document contain?

The document contains a general system architecture figure, an RF block diagram, and a DS-CDMA spectrum mask figure. It also contains tables for channel spacing, receiver dynamic range, BER thresholds, maximum system loading classes, co-channel and adjacent-channel interference sensitivity, standardized interfaces, and power supply ranges.

For engineering work, these tables and figures provide the basis for design, type testing, and declared capability. For procurement and acceptance, they show which performance points and interfaces a compliant system must state and demonstrate.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.NDGRYHþTransmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); Direct Sequence Code Division Multiple Access (DS-CDMA) point-to-multipoint DRRS in frequency bands in the range 3 GHz to 11 GHz33.060.30Radiorelejni in fiksni satelitski komunikacijski sistemiRadio relay and fixed satellite communications systems33.040.20Prenosni sistemTransmission systemsICS:Ta slovenski standard je istoveten z:EN 301 124 Version 1.1.1SIST EN 301 124:1999en01-november-1999SIST EN 301 124:1999SLOVENSKI
STANDARD
EN 301 124 V1.1.1 (1998-11)European Standard (Telecommunications series)Transmission and Multiplexing (TM);Digital Radio Relay Systems (DRRS);Direct Sequence Code Division Multiple Access (DS-CDMA)point-to-multipoint DRRS in frequency bandsin the range 3 GHz to 11 GHzSIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)2ReferenceDEN/TM-04042 (aeo00ico.PDF)KeywordsCDMA, multipoint, radio, RLL, transmission,DRRSETSIPostal addressF-06921 Sophia Antipolis Cedex - FRANCEOffice address650 Route des Lucioles - Sophia AntipolisValbonne - FRANCETel.: [phone]
Fax: [phone]Siret N° 348 623 562 00017 - NAF 742 CAssociation à but non lucratif enregistrée à laSous-Préfecture de Grasse (06) N° 7803/[e-mail] copies of this ETSI deliverablecan be downloaded fromhttp://www.etsi.orgCopyright NotificationNo 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.SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)3ContentsIntellectual Property Rights.5Foreword.5Introduction.51Scope.71.1Applications.71.2Frequencies.71.3Access method.71.4Compatibility.72References.73Definitions, symbols and abbreviations.93.1Definitions.93.2Symbols.93.3Abbreviations.94General system architecture.114.1Sub-system types.114.2System characteristics.124.2.1Transmission error performance.124.2.2Round trip delay.124.2.3Transparency.124.2.4TMN interface.134.2.5Synchronization.135Radio characteristics.135.1Frequency bands.135.2Channel arrangement.135.2.1System loading.135.3Transmitter (Tx) characteristics.135.3.1Tx power range.135.3.1.1Automatic Transmit Power Control (ATPC).145.3.1.2 Remote Transmit Power Control (RTPC).145.3.2Spectrum mask.145.3.3Transmitter spurious emissions.155.3.4Radio Frequency (RF) tolerance.155.4Receiver characteristics.155.4.1Dynamic range.155.4.2Broadband Continuous Wave (CW) interference rejection capability.165.4.3Spurious emissions.165.4.4BER performance.165.4.4.1Single signal performance.165.4.4.2Loaded BER performance.165.4.4.3Maximum System Loading (MSL).165.4.5Interference sensitivity.215.4.5.1Co-channel interference sensitivity.215.4.5.2Adjacent channel interference sensitivity.215.5Antenna port characteristics.215.5.1RF interface.215.5.2Return loss.226Types of subscriber equipment and network exchange interface.227Power supply and environmental characteristics.227.1Power supply.227.2Environmental conditions.23SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)47.2.1Equipment within weather-protected locations.237.2.2Equipment for non weather-protected locations.237.3ElectroMagnetic Compatibility (EMC) conditions.23Bibliography.24History.25SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)5Intellectual Property RightsIPRs essential or potentially essential to the present document may have been declared to ETSI. The informationpertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be foundin SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respectof ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on theETSI Web server (http://www.etsi.org/ipr).Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guaranteecan be given as to the existence of other IPRs not referenced in SR 000 314 (or the updates on the ETSI Web server)which are, or may be, or may become, essential to the present document.ForewordThis European Standard (Telecommunications series) has been produced by ETSI Technical Committee Transmissionand Multiplexing (TM).National transposition datesDate of adoption of this EN:30 October 1998Date of latest announcement of this EN (doa):31 January 1999Date of latest publication of new National Standardor endorsement of this EN (dop/e):31 July 1999Date of withdrawal of any conflicting National Standard (dow):31 July 1999IntroductionThe main field of application of Point-to-Multipoint (P-MP) Systems is to provide access to both public and privatenetworks (PSTN, PDN, …). By means of P-MP systems the network service area may be extended to cover both distantand scattered subscriber locations; and the systems may be applied to build new access networks covering both urbanand rural areas.Subscribers are offered the full range of services by the particular public or private network. Subscribers have access tothese services by means of the various standardized user network interfaces (2-wire loop, new data services and ISDN).P-MP systems provide standard network interfaces and transparently connect subscribers to the appropriate networknode. These systems allow a service to be connected to a number of subscribers ranging from a few users to severalthousand, and over a wide range of distances.P-MP systems are generally configured as Pre-Assigned Multiple Access (PAMA) Systems or as Demand-AssignedMultiple Access (DAMA) radio systems.The essential features of a typical P-MP DAMA radio systems are:-efficient use of the radio spectrum;-concentration;-and transparency.Radio is often the ideal way of obtaining communications at low cost, almost independent of distance and difficulttopography. Moreover, a small number of sites is required for these installations, thus facilitating rapid implementationand minimizing maintenance requirements of the systems.SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)6Concentration means that m subscribers can share n radio channels (m being larger than n), allowing a better use to bemade of the available frequency spectrum and at a lower equipment cost. The term "multiple-access" means that everysubscriber has access to every channel (instead of a fixed assignment as in most multiplex systems). When a call isinitiated an available channel is allocated to it. When the call is terminated, the channel is released for another call.Concentration requires the use of distributed intelligent control which in turn allows many other operation andmaintenance functions to be added.Transparency means that the exchange and the subscriber equipment communicate with each other without being awareof the radio link.SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)71Scope1.1ApplicationsThe scope of the present document covers the following typical point-to-multipoint applications:-voice;-fax;-voiceband data;-telex;-data up to 2 Mbit/s;-ISDN.1.2FrequenciesThe present document covers fixed service allocations in the 3 GHz to 11 GHz band. Bands identified by CEPT forP-MP applications between 3 GHz and 11 GHz are:-3 410 MHz to 3 600 MHz see ERC Recommendation T/R 14-03 [20];-3 600 MHz to 3 800 MHz see ERC Recommendation T/R 12-08 [21]; and-10,15 GHz to 10,3 GHz paired with 10,5 to 10,65 GHz see ERC Recommendation T/R 12/05 [22].1.3Access methodThe present document covers Direct Sequence Code Division Multiple Access (DS-CDMA) systems.1.4CompatibilityThere is no requirement to operate Central Station (CS) equipment from one manufacturer with Terminal Station (TS) orRepeater Station (RS) equipment from another manufacturer.2ReferencesThe following documents contain provisions which, through reference in this text, constitute provisions of the presentdocument.· References are either specific (identified by date of publication, edition number, version number, etc.) ornon-specific.· For a specific reference, subsequent revisions do not apply.· For a non-specific reference, subsequent revisions do apply.· A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the samenumber.[1]ETS 300 012: "Integrated Services Digital Network (ISDN); Basic user-network interface; Layer 1specification and test principles".SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)8[2]ITU-T Recommendation G.703: "Physical/electrical characteristics of hierarchic digitalinterfaces".[3]ITU-T Recommendation Q.553: "Transmission characteristics at 4-wire analogue interfaces ofdigital exchanges".[4]ITU-T Recommendation Q.552: "Transmission characteristics at 2-wire analogue interfaces ofdigital exchanges".[5]ITU-T Recommendation G.821: "Error performance of an international digital connectionoperating at a bit rate below the primary rate and forming part of an integrated services digitalnetwork".[6]ITU-T Recommendation R.20 and ITU-T V-series of Recommendations: "Telegraph modem forsubscriber lines".[7]ETS 300 019: "Equipment Engineering (EE); Environmental conditions and environmental testsfor telecommunications equipment".[8]ITU-T Recommendation G.773: "Protocol suites for Q-interfaces for management of transmissionsystems".[9]ETS 300 385: "Radio Equipment and Systems (RES); ElectroMagnetic Compatibility (EMC)standard for digital fixed radio links and ancillary equipment with data rates around 2 Mbit/s andabove".[10]ITU-T Recommendation G.711: "Pulse code modulation (PCM) of voice frequencies".[11]ITU-T Recommendation G.726: "40, 32, 24, 16 kbit/s Adaptive Differential Pulse CodeModulation (ADPCM)".[12]ITU-T Recommendation G.728: "Coding of speech at 16 kbit/s using low-delay code excited linearprediction".[13]ITU-T Recommendation G.729: "Coding of speech at 8 kbit/s using conjugate structure algebraic-code-excited linear-prediction (CS-ACELP)".[14]ITU-R Recommendation F.697: "Error performance and availability objectives for the local-gradeportion at each end of an ISDN connection at a bit rate below the primary rate utilizing digitalradio-relay systems".[15]Void.[16]ITU-T Recommendation G.131: "Control of talker echo".[17]ETS 300 132: "Equipment Engineering (EE); Power supply interface at the input totelecommunications equipment".[18]ITU-T Radio Regulation 831: "ITU Radio Regulations Part 1".[19]EN 300 339: "Electromagnetic compatibility and Radio spectrum Matters (ERM); GeneralElectroMagnetic Compatibility (EMC) for radio communications equipment".[20]ERC Recommendation T/R 14-03: "Harmonised radio frequency channel arrangements for low andmedium capacity systems in the band 3400 MHz to 3600 MHz".[21]ERC Recommendation T/R 12-08: "Harmonised Radio Frequency Channel Arrangements andBlock Allocations for Medium and High Capacity Systems in the Band 3600 MHz to 4200 MHz".[22]ERC Recommendation T/R 12-05: "Harmonised radio frequency channel arrangements for digitalterrestrial fixed systems operating in the band 10.0 - 10.68 GHz".SIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)9[23]ETS 300 324: "V interfaces at the digital Local Exchange (LE); V5.1 Interface for the support ofAccess Network (AN)".[24]ETS 300 347: "V interfaces at the digital Local Exchange (LE); V5.2 interface for the support ofAccess Network (AN)".[25]EN 301 055: "Transmission and Multiplexing (TM); Digital Radio Relay Systems (DRRS); DirectSequence Code Division Multiple Access (DS-CDMA); Point-to-multipoint DRRS frequencybands in the range 1 GHz to 3 GHz".[26]CEPT/ERC Recommendation 74-01: "Spurious Emissions".3Definitions, symbols and abbreviations3.1DefinitionsFor the purposes of the present document, the following definitions apply:chip: A unit of modulation used in Direct Sequence Spread Spectrum (DSSS) modulation.chip rate: The number of chips per second, e.g. Mchip/s.chip sequence: A sequence of chips with defined length and chip polarities.DSSS modulation: A form of modulation whereby a combination of data to be transmitted and a fixed code sequence(chip sequence) is used to directly modulate a carrier, e.g. by phase shift keying.single DS-CDMA signal: A single traffic channel and any associated signalling and synchronization overhead.system loading: The number of simultaneous traffic channels at 64 kbit/s in a given radio channel.maximum system loading: The number of simultaneous 64 kbit/s traffic channels in a given radio channel for the classof operation declared by the manufacturer.round trip delay: The sum of the delays between points F to G and G to F in figure 1, including any repeaters ifappropriate.3.2SymbolsFor the purposes of the present document, the following symbols apply:dBdecibeldBmdecibels relative to one milliwatt3.3AbbreviationsFor the purposes of the present document, the following abbreviations apply:ADPCMAdaptive Differential Pulse Code ModulationATPCAutomatic Transmit Power ControlBERBit Error RatioBWBandWidthCCSCentral Controller StationCRSCentral Radio StationCSCentral StationCS-ACELPConjugate Structure Algebraic-Code-Excited Linear-PredictionCWContinuous WaveDAMADemand-Assigned Multiple AccessDS-CDMA Direct Sequence Code Division Multiple AccessSIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)10DSSSDirect Sequence Spread SpectrumEMCElectroMagnetic CompatibilityISDNIntegrated Services Digital NetworkMOSMean Opinion ScoreMSLMaximum System LoadingPAMAPre-Assigned Multiple AccessPCMPulse Code ModulationPDNPublic Data NetworkP-MPPoint-to-MultiPointPRBSPseudo Random Binary SequencePSTNPublic Switched Telephone NetworkQDUQuantisation Distortion UnitRFRadio FrequencyRSRepeater StationRSLReceived Signal LevelRTPCRemote Transmit Power ControlTETerminal EquipmentTMNTelecommunications Management NetworkTSTerminal StationTxTransmitterSIST EN 301 124:1999

ETSIEN 301 124 V1.1.1 (1998-11)114General system architectureCSCCSCRSRSAnotherCRSmaybeconnectedtothesameCCSFGTSTETSTETSTETENetworkNodeGGGTETSTEGTSTEGBasebandinterfacereferencepoints/FGdirectionalantennaomnidirectionalorsectorantennaFigure 1: General System Architecture4.1Sub-system typesCentral Station (CS) which may be subdivided into two units:CCS: Central Co
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