SIST ETS 300 175-1:1999

Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1: Overview

To update ETS 300 175  based upon experiences from the development of TBR 6 & 10  and comments received.

Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Skupni vmesnik (CI) - 1. del: Pregled

General Information

• Status: Published
• Publication Date: 30-Jun-1999
• ICS: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-1999
• Due Date: 01-Jul-1999
• Completion Date: 01-Jul-1999
• Ref Project: ETSI ETS 300 175-1 ed.2 (1996-09) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1: Overview

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1: Overview33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:ETS 300 175-1 E23SIST ETS 300 175-1:199en01-QRYHPEHU-1993SIST ETS 300 175-1:199SLOVENSKI
STANDARD



SIST ETS 300 175-1:1999



EUROPEANETS 300 175-1TELECOMMUNICATIONSeptember 1996STANDARDSecond EditionSource: ETSI TC-RESReference: RE/RES-03027-1ICS:33.060, 33.060.50Key words:DECT, radioRadio Equipment and Systems (RES);Digital Enhanced Cordless Telecommunications (DECT);Common Interface (CI);Part 1: OverviewETSIEuropean 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: [e-mail].: [phone] - Fax: [phone]Copyright 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 1996. All rights reserved.SIST ETS 300 175-1:1999



Page 2ETS 300 175-1: September 1996Whilst 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 300 175-1:1999



Page 3ETS 300 175-1: September 1996ContentsForeword.51Scope.72Normative references.73Definitions and abbreviations.83.1Definitions.83.2Abbreviations.154Structure.184.1Part 1: Overview.184.2Part 2: Physical Layer (PHL).184.3Part 3: Medium Access Control (MAC) layer.184.4Part 4: Data Link Control (DLC) layer.184.5Part 5: Network (NWK) layer.184.6Part 6: Identities and addressing.184.7Part 7: Security features.194.8Part 8: Speech coding and transmission.194.9Part 9: Public Access Profile (PAP).195The objectives of this ETS.196General description of the system.207Description of the protocol architecture.217.1General.217.2The DECT layered structure.217.3Physical layer (PHL).217.4MAC layer.227.5DLC layer.227.6Network (NWK) layer.227.7Lower Layer Management Entity (LLME).237.8Interworking Units (IWU).238Proprietary escapes within the CI.238.1Primary escape routes.238.2Secondary escape routes.249Levels of conformance.24Annex A (informative):Bibliography.25History.26SIST ETS 300 175-1:1999



Page 4ETS 300 175-1: September 1996Blank pageSIST ETS 300 175-1:1999



Page 5ETS 300 175-1: September 1996ForewordThis second edition European Telecommunication Standard (ETS) has been produced by the RadioEquipment and Systems (RES) Technical Committee of the European Telecommunications StandardsInstitute (ETSI).This ETS forms part 1 of a series of 9 laying down the arrangements for the Digital Enhanced CordlessTelecommunications (DECT) Common Interface (CI), and provides an overview of the whole ETS.Part 1:"Overview".Part 2"Physical layer (PHL)".Part 3"Medium Access Control (MAC) layer".Part 4"Data Link Control (DLC) layer".Part 5:"Network (NWK) layer".Part 6:"Identities and addressing".Part 7:"Security features".Part 8:"Speech coding and transmission".Part 9:"Public Access Profile (PAP)".The following aspects of this ETS are subject to controlled distribution:a)DECT identities, as defined in ETS 300 175-6 [5];b)DECT cryptographic algorithms.The cryptographic algorithms specify the details of the DECT standard authentication algorithm and theDECT standard cipher.These aspects are distributed on an individual basis. Further information and details of the currentdistribution procedures can be obtained from the ETSI Secretariat at the address on the first page of thisETS.Further details of the DECT system may be found in ETR 015, ETR 043, and ETR 056 (see annex A).Transposition datesDate of adoption of this ETS:6 September 1996Date of latest announcement of this ETS (doa):31 December 1996Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1997Date of withdrawal of any conflicting National Standard (dow):30 June 1997SIST ETS 300 175-1:1999



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Page 7ETS 300 175-1: September 19961ScopeThis second edition European Telecommunication Standard (ETS) gives an introduction and overview ofthe complete Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI).This part contains an abstract of the other parts of the DECT standard together with a general descriptionof:-the objectives of this ETS;-the DECT CI;-the protocol architecture of DECT.This part also provides an extensive vocabulary, in particular it contains the common definitions of all thetechnical terms used in different parts of this ETS.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 300 175-2 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 2: Physical layer (PHL)".[2]ETS 300 175-3 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 3: Medium Access Control (MAC) layer".[3]ETS 300 175-4 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 4: Data Link Control (DLC) layer".[4]ETS 300 175-5 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 5: Network (NWK) layer".[5]ETS 300 175-6 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 6: Identities and addressing".[6]ETS 300 175-7 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 7: Security features".[7]ETS 300 175-8 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 8: Speech coding and transmission".[8]ETS 300 175-9 (1996): "Radio Equipment and Systems (RES); DigitalEnhanced Cordless Telecommunications (DECT); Common Interface (CI);Part 9: Public Access Profile (PAP)".[9]I-ETS 300 176: "Radio Equipment and Systems (RES); Digital EuropeanCordless Telecommunications (DECT); Approval test specification".SIST ETS 300 175-1:1999



Page 8ETS 300 175-1: September 19963Definitions and abbreviations3.1DefinitionsFor the purposes of this ETS, the following definitions apply:antenna diversity: Diversity implies that the Radio Fixed Part (RFP) for each bearer independently canselect different antenna properties such as gain, polarisation, coverage patterns, and other features thatmay effect the practical coverage. A typical example is space diversity, provided by two vertically polarisedantennas separated by 10 - 20 cm.attach: The process whereby a Portable Part (PP) within the coverage area of a Fixed Part (FP) to whichit has access rights, notifies the FP that it is operative. The reverse process is detach, which reports thePP as inoperative.NOTE 1:An operative PP is assumed to be ready to receive calls.authentication (of a subscriber): The process whereby a DECT subscriber is positively verified to be alegitimate user of a particular FP.NOTE 2:Authentication is generally performed at call set-up, but may also be done at any othertime (e.g. during a call).bearer: See Medium Access Control (MAC) bearer or bearer service.bearer handover: The internal handover process provided by the MAC layer, whereby one MACconnection can modify its underlying bearers while maintaining the service provided to the Data LinkControl (DLC) layer.NOTE 3:Bearer handover is slot based.bearer service: A type of telecommunication service that provides a defined capability for thetransmission of signals between user-network interfaces.NOTE 4:The DECT user-network interface corresponds to the top of the DECT network layer(layer 3).broadcast: A simplex point-to-multipoint mode of transmission.NOTE 5:The transmitter may disregard the presence or absence of receivers.C-plane: The control plane of the DECT protocol stacks, which contains all of the internal DECT protocolcontrol, but may also include some external user information.NOTE 6:The C-plane stack always contains protocol entities up to and including the networklayer.call: All of the Network (NWK) layer processes involved in one NWK layer peer-to-peer association.NOTE 7:Call may sometimes be used to refer to processes of all layers, since lower layerprocesses are implicitly required.cell: The domain served by a single antenna(e) system (including a leaky feeder) of one FP.NOTE 8:A cell may include more than one source of radiated Radio Frequency (RF) energy(i.e. more than one radio end point).Central Control Fixed Part (CCFP): A physical grouping that contains the central elements of a FP. A FPcontains a maximum of one CCFP.NOTE 9:A CCFP controls one or more RFPs.SIST ETS 300 175-1:1999



Page 9ETS 300 175-1: September 1996centrex: An implementation of a private telecommunication network exchange that is not located on thepremises of the private network operator. It may be co-located with, or physically a part of a publicexchange.channel: See physical channel.cluster: A logical grouping of one or more cells between which bearer handover is possible. A ClusterControl Function (CCF) controls one cluster.NOTE 10:Internal handover to a cell which is not part of the same cluster can only be done byconnection handover.connection: See "MAC connection".connection handover: The internal handover process provided by the DLC layer, whereby one set ofDLC entities (C-plane and U-plane) can re-route data from one MAC connection to a second new MACconnection, while maintaining the service provided to the NWK layer.NOTE 11:Connection handover is DLC frame based.Connectionless mode (C/L): A transmission mode that transfers one packet (one self contained unit) ofdata from one source point to one (or more) destination points in a single phase.NOTE 12:Connectionless transmissions require the peer-to-peer associations to be prearranged,and the transmission is unacknowledged at that layer.Connection Oriented mode (C/O): A transmission mode that transfers data from one source point to oneor more destination points using a protocol based on three phases: "Set-up", "Data transfer" and"Release".NOTE 13:C/O mode requires no prearranged associations between peer entities (unlike C/Lmode).Cordless Radio Fixed Part (CRFP): A Wireless Relay Station (WRS) that provides independent bearercontrol to a PT and FT for relayed connections.coverage area: The area over which reliable communication can be established and maintained.DECT Network (DNW): A network that uses the DECT air interface to interconnect a local network to oneor more portable applications. The logical boundaries of the DECT network are defined to be at the top ofthe DECT NWK layer.NOTE 14:A DNW is a logical grouping that contains one or more Fixed radio Terminations (FTs)plus their associated Portable radio Termination (PT). The boundaries of the DECTnetwork are not physical boundaries.DLC broadcast: A simplex "connectionless" mode of transmission from the DLC broadcast entity of oneFT to the DLC broadcast entities in one or more PT.NOTE 15:The transmitter may disregard the presence or absence of receivers.DLC data link (DLC link): An association between two DLC layer entities. This can either be one C-planeassociation or one U-plane association.NOTE 16:This is not the same as a MAC connection.DLC frame: The format used to structure all messages that are exchanged between DLC layer peerentities.NOTE 17:Different DLC frames are used in the C-plane and the U-plane, and there is more thanone format of DLC frame in each plane.SIST ETS 300 175-1:1999



Page 10ETS 300 175-1: September 1996double duplex bearer: The use of two duplex bearers (see duplex bearer) which refer to the same MACconnection, sharing their simplex bearers (see simplex bearer) for the information flow.double-simplex bearer: The use of two simplex bearers operating in the same direction on two physicalchannels. These pairs of channels always use the same RF carrier and always use evenly spaced slots(i.e. separated by 0,5 Time Division Multiple Access (TDMA) frame).A double-simplex bearer only exists as part of a multibearer MAC connection.down-link: Transmission in the direction FT to PT.duplex bearer: The use of two simplex bearers operating in opposite directions on two physical channels.These pairs of channels always use the same RF carrier and always use evenly spaced slots (i.e.separated by 0,5 TDMA frame).End System (ES): A logical grouping that contains application processes and supportstelecommunication services.NOTE 18:From the OSI point of view, end systems are considered as sources and sinks ofinformation.external handover: The process of switching a call in progress from one FP to another FP.field: A continuous region of data (i.e. adjacent bits) that jointly convey information. Typically, a messagewill contain several fields. If data is not continuous then it is defined as two (or more) fields.Fixed Part (DECT Fixed Part) (FP): A physical grouping that contains all of the elements in the DECTnetwork between the local network and the DECT air interface.NOTE 19:A DECT FP contains the logical elements of at least one FT, plus additionalimplementation specific elements.Fixed radio Termination (FT): A logical group of functions that contains all of the DECT processes andprocedures on the fixed side of the DECT air interface.NOTE 20:A FT only includes elements that are defined in ETS 300 175 parts 1 to 8 [1] to [8].This includes radio transmission elements (layer 1) together with a selection of layer 2and layer 3 elements.flow control: The mechanism that is used to regulate the flow of data between two peer entities.fragment: One of the Service Data Units (SDUs) that is produced by the process of fragmentation.NOTE 21:This is not the same as a segment.fragmentation: The process of dividing a Protocol Data Unit (PDU) into more than one SDU for deliveryto a lower layer. The reverse process is recombination.NOTE 22:This is not the same as segmentation.frame: See TDMA frame or DLC frame.full slot (slot): One 24th of a TDMA frame which is used to support one physical channel.generic: A generalised set or general purpose set, often in the sense of basic or ordinary.geographically unique: This term relates to FP identities, Primary Access Rights Identifiers (PARIs) andRadio Fixed Part Identifiers (RFPIs). It indicates that two FPs with the same PARI, or respectively twoRFPs with the same RFPI, can not be reached or listened to at the same geographical position.SIST ETS 300 175-1:1999



Page 11ETS 300 175-1: September 1996Global Network (GNW): A telecommunication network capable of offering a long distancetelecommunication service.NOTE 23:The term does not include legal or regulatory aspects, nor does it indicate if thenetwork is a public or a private network.globally unique identity: The identity is unique within DECT (without geographical or other restrictions).guard space: The nominal interval between the end of a radio transmission in a given slot, and the startof a radio transmission in the next successive slot.NOTE 24:This interval is included at the end of every slot, in order to prevent adjacenttransmissions from overlapping even when they originate with slightly different timingreferences (e.g. from different radio end points).half slot: One 48th of a TDMA frame which is used to support one physical channel.handover: The process of switching a call in progress from one physical channel to another physicalchannel. These processes can be internal (see internal handover) or external (see external handover).NOTE 25:There are two physical forms of handover, intracell handover and intercell handover.Intracell handover is always internal, intercell handover can be internal or external.incoming call: A call received at a PP.intercell handover: The switching of a call in progress from one cell to another cell.internal handover: Handover processes that are completely internal to one FT. Internal handoverreconnects the call at the lower layers, while maintaining the call at the NWK layer.NOTE 26:The lower layer reconnection can either be at the DLC layer (see connection handover)or at the MAC layer (see bearer handover).interoperability: The capability of FPs and PPs, that enable a PP to obtain access to teleservices in morethan one location area and/or from more than one operator (more than one service provider).interoperator roaming: Roaming between FP coverage areas of different operators (different serviceproviders).Interworking Unit (IWU): A unit that is used to interconnect subnetworks.NOTE 27:The IWU will contain the InterWorking Functions (IWF) necessary to support therequired subnetwork interworking.intracell handover: The switching of a call in progress from one physical channel of one cell to anotherphysical channel of the same cell.intraoperator roaming: Roaming between different FP coverage areas of the same operator (sameservice provider).link: See DLC data link.Local Network (LNW): A telecommunication network capable of offering local telecommunicationservices.NOTE 28:The term does not include legal or regulatory aspects, nor does it indicate if thenetwork is a public network or a private network.locally unique identity: The identity is unique within one FP or location area, depending on application.SIST ETS 300 175-1:1999



Page 12ETS 300 175-1: September 1996location area: The domain in which a PP may receive (and/or make) calls as a result of a single locationregistration.location registration: The process whereby the position of a DECT portable termination is determined tothe level of one location area, and this position is updated in one or more databases.NOTE 29:These databases are not included within the DECT FT.logical channel: A generic term for any distinct data path. Logical channels can be considered to operatebetween logical end points.Lower Layer Management Entity (LLME): A management entity that spans a number of lower layers,and is used to describe all control activities which do not follow the rules of layering.NOTE 30:The DECT LLME spans the NWK layer, the DLC layer, the MAC layer and the PHL.MAC bearer (bearer): MAC bearers are the service elements that are provided by each Cell Site Function(CSF). Each MAC bearer corresponds to a single service instance to the physical layer. See also simplexbearer, duplex bearer and double simplex bearer.MAC connection (connection): An association between one source MAC Multi-Bearer Control (MBC)entity and one destination MAC MBC entity. This provides a set of related MAC services (a set of logicalchannels), and it can involve one or more underlying MAC bearers.multiframe: A repeating sequence of 16 successive TDMA frames, that allows low rate or sporadicinformation to be multiplexed (e.g. basic system information or paging).network (telecommunication network): All the means of providing telecommunication services betweena number of locations where the services are accessed via equipment attached to the network.node: A point at which switching occurs.operator (DECT operator): The individual or entity who or which is responsible for operation of one ormore DECT FPs.NOTE 31:The term does not imply any legal or regulatory conditions, nor does it imply anyaspects of ownership.outgoing call: A call originating from a PP.paging: The process of broadcasting a message from a DECT FP to one or more DECT PPs.NOTE 32:Different types of paging message are possible. For example, the {Request paging}message orders the recipient to respond with a call set-up attempt.paging area: The domain in which the PP will be paged as a part of incoming call establishment.NOTE 33:In general, the paging area will be equal to the Temporary Portable User Identity(TPUI) domain, since the TPUI is used for paging.phase: One discrete part of a procedure, where the start and end of the part can be clearly identified (e.g.by the arrival or dispatch of a primitive).physical channel (channel): The simplex channel that is created by transmitting in one particular slot onone particular RF channel in successive TDMA frames. See also simplex bearer.NOTE 34:One physical channel provides a simplex service. Two physical channels are requiredto provide a duplex service.SIST ETS 300 175-1:1999



Page 13ETS 300 175-1: September 1996Portable Application (PA): A logical grouping that contains all the elements that lie beyond the DECTnetwork boundary on the portable side.NOTE 35:The functions contained in the portable application may be physically distributed, butany such distribution is invisible to the DECT network.Portable Handset (PHS): A single physical grouping that contains all of the portable elements that areneeded to provide a teleservice to the user.NOTE 36:PHS is a subset of all possible portable parts. This subset includes all physicalgroupings that combine one PT plus at least one portable application in a singlephysical box.Portable Part (DECT Portable Part) (PP): A physical grouping that contains all elements between theuser and the DECT air interface. PP is a generic term that may describe one or several physical pieces.NOTE 37:A DECT PP is logically divided into one PT plus one or more portable applications.Portable radio Termination (PT): A logical group of functions that contains all of the DECT processesand procedures on the portable side of the DECT air interface.NOTE 38:A PT only includes elements that are defined in ETS 300 175 [1] to [8]. This includesradio transmission elements (layer 1) together with a selection of layer 2 and layer 3elements.primitive: A distinct (but abstract) data element that is passed between adjacent protocol layers.NOTE 39:A service primitive contains one SDU.private: An attribute indicating that the application of the so qualified term, e.g. a network, an equipment,a service, is offered to, or is in the interest of, a determined set of users.NOTE 40:The term does not include any legal or regulatory aspects, nor does it indicate anyaspects of ownership.public: An attribute indicating that the application of the so qualified term, e.g. a network, an equipment, aservice, is offered to, or is in the interest of, the general public.NOTE 41:The term does not include any legal or regulatory aspects, nor does it indicate anyaspects of ownership.Public Access Profile (PAP): A defined part of this ETS, i.e. ETS 300 175-9 [8] that ensuresinteroperability between FPs and PPs for public access services.public access service: A service that provides access to a public network for the general public.NOTE 42:The term does not imply any legal or regulatory aspect, nor does it imply any aspectsof ownership.radio channel: No defined meaning. See RF channel or physical channel.radio end point: A physical grouping that contains one radio transceiver (transmitter/receiver), fixed orportable.NOTE 43:A radio end point may operate only as a receiver or only as a transmitter.Radio Fixed Part (RFP): One physical sub-group of a FP that contains all the radio end points (one ormore) that are connected to a single system of antennas.registration: An ambiguous term, that should always be qualified. See either location registration orsubscription registration.SIST ETS 300 175-1:1999



Page 14ETS 300 175-1: September 1996Repeater Part (REP): A WRS that relays information within the half frame time interval.RF carrier (carrier): The centre frequency occupied by one DECT transmission.RF channel: The nominal range of frequencies (RF spectrum) allocated to the DECT transmissions of asingle RF carrier.roaming: The movement of a PP from one FP coverage area to another FP coverage area, where thecapabilities of the FPs enable the PP to make or receive calls in both areas.NOTE 44:Roaming requires the relevant FPs and PPs to be interoperable.roaming service: A service which can be used in more than one FP coverage area.segment: One of the pieces of data that is produced by the process of segmentation.NOTE 45:In general, one segment only represents a portion of a complete message.segmentation: The process of partitioning one SDU from a higher layer into more than one PDU. Thereverse process is assembly.service provider (telecommunications service provider): The individual, or entity, who, or which,interfaces to the customer in providing telecommunications service.NOTE 46:The term does not imply any legal or regulatory conditions, nor does it indicate whetherpublic service or private service is provided.NOTE 47:The term service provider is also used with a different meaning in the ISO/OSI layeredmodel.sequencing (sequence numbering): The process of adding a sequence number to a set of data packetsso that the packets can be reassembled in the correct order, regardless of the order they are received.See also segmentation.simplex bearer: A simplex bearer is the MAC layer service that is created using one physical channel.See also duplex bearer and double simplex bearer.Single Radio Fixed Part (SRFP): A radio FP that contains only one radio end point.NOTE 48:The SRFP is defined for DECT system analysis. Unless otherwise stated, a SRFP isassumed to support multiple calls, and is limited only by the capacity of its single radioend point.subscriber (customer): The natural person, or the juristic person who has subscribed totelecommunication services, and is, therefore, responsible for payment.subscription registration: The infrequent process whereby a subscriber obtains access rights to one ormore FPs.NOTE 49:Subscription registration is usually required before a user can make or receive calls.SIST ETS
...

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Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1:
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SIST ETS 300 175-1:1999
EUROPEAN ETS 300 175-1
TELECOMMUNICATION September 1996
STANDARD Second Edition
Source: ETSI TC-RES Reference: RE/RES-03027-1
ICS: 33.060, 33.060.50
Key words: DECT, radio
Radio Equipment and Systems (RES);
Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 1: Overview
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1996. All rights reserved.

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SIST ETS 300 175-1:1999
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ETS 300 175-1: September 1996
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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ETS 300 175-1: September 1996
Contents
Foreword .5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .8
3.1 Definitions .8
3.2 Abbreviations .15
4 Structure.18
4.1 Part 1: Overview .18
4.2 Part 2: Physical Layer (PHL).18
4.3 Part 3: Medium Access Control (MAC) layer .18
4.4 Part 4: Data Link Control (DLC) layer .18
4.5 Part 5: Network (NWK) layer .18
4.6 Part 6: Identities and addressing .18
4.7 Part 7: Security features .19
4.8 Part 8: Speech coding and transmission .19
4.9 Part 9: Public Access Profile (PAP) .19
5 The objectives of this ETS .19
6 General description of the system.20
7 Description of the protocol architecture.21
7.1 General .21
7.2 The DECT layered structure .21
7.3 Physical layer (PHL).21
7.4 MAC layer .22
7.5 DLC layer .22
7.6 Network (NWK) layer.22
7.7 Lower Layer Management Entity (LLME).23
7.8 Interworking Units (IWU) .23
8 Proprietary escapes within the CI.23
8.1 Primary escape routes.23
8.2 Secondary escape routes .24
9 Levels of conformance.24
Annex A (informative): Bibliography.25
History.26

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ETS 300 175-1: September 1996
Foreword
This second edition European Telecommunication Standard (ETS) has been produced by the Radio
Equipment and Systems (RES) Technical Committee of the European Telecommunications Standards
Institute (ETSI).
This ETS forms part 1 of a series of 9 laying down the arrangements for the Digital Enhanced Cordless
Telecommunications (DECT) Common Interface (CI), and provides an overview of the whole ETS.
Part 1: "Overview".
Part 2 "Physical layer (PHL)".
Part 3 "Medium Access Control (MAC) layer".
Part 4 "Data Link Control (DLC) layer".
Part 5: "Network (NWK) layer".
Part 6: "Identities and addressing".
Part 7: "Security features".
Part 8: "Speech coding and transmission".
Part 9: "Public Access Profile (PAP)".
The following aspects of this ETS are subject to controlled distribution:
a) DECT identities, as defined in ETS 300 175-6 [5];
b) DECT cryptographic algorithms.
The cryptographic algorithms specify the details of the DECT standard authentication algorithm and the
DECT standard cipher.
These aspects are distributed on an individual basis. Further information and details of the current
distribution procedures can be obtained from the ETSI Secretariat at the address on the first page of this
ETS.
Further details of the DECT system may be found in ETR 015, ETR 043, and ETR 056 (see annex A).
Transposition dates
Date of adoption of this ETS: 6 September 1996
Date of latest announcement of this ETS (doa): 31 December 1996
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 June 1997
Date of withdrawal of any conflicting National Standard (dow): 30 June 1997

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SIST ETS 300 175-1:1999
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ETS 300 175-1: September 1996
1 Scope
This second edition European Telecommunication Standard (ETS) gives an introduction and overview of
the complete Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI).
This part contains an abstract of the other parts of the DECT standard together with a general description
of:
- the objectives of this ETS;
- the DECT CI;
- the protocol architecture of DECT.
This part also provides an extensive vocabulary, in particular it contains the common definitions of all the
technical terms used in different parts of this ETS.
2 Normative references
This ETS incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 175-2 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 2: Physical layer (PHL)".
[2] ETS 300 175-3 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 3: Medium Access Control (MAC) layer".
[3] ETS 300 175-4 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 4: Data Link Control (DLC) layer".
[4] ETS 300 175-5 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 5: Network (NWK) layer".
[5] ETS 300 175-6 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 6: Identities and addressing".
[6] ETS 300 175-7 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 7: Security features".
[7] ETS 300 175-8 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 8: Speech coding and transmission".
[8] ETS 300 175-9 (1996): "Radio Equipment and Systems (RES); Digital
Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 9: Public Access Profile (PAP)".
[9] I-ETS 300 176: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Approval test specification".

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3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
antenna diversity: Diversity implies that the Radio Fixed Part (RFP) for each bearer independently can
select different antenna properties such as gain, polarisation, coverage patterns, and other features that
may effect the practical coverage. A typical example is space diversity, provided by two vertically polarised
antennas separated by 10 - 20 cm.
attach: The process whereby a Portable Part (PP) within the coverage area of a Fixed Part (FP) to which
it has access rights, notifies the FP that it is operative. The reverse process is detach, which reports the
PP as inoperative.
NOTE 1: An operative PP is assumed to be ready to receive calls.
authentication (of a subscriber): The process whereby a DECT subscriber is positively verified to be a
legitimate user of a particular FP.
NOTE 2: Authentication is generally performed at call set-up, but may also be done at any other
time (e.g. during a call).
bearer: See Medium Access Control (MAC) bearer or bearer service.
bearer handover: The internal handover process provided by the MAC layer, whereby one MAC
connection can modify its underlying bearers while maintaining the service provided to the Data Link
Control (DLC) layer.
NOTE 3: Bearer handover is slot based.
bearer service: A type of telecommunication service that provides a defined capability for the
transmission of signals between user-network interfaces.
NOTE 4: The DECT user-network interface corresponds to the top of the DECT network layer
(layer 3).
broadcast: A simplex point-to-multipoint mode of transmission.
NOTE 5: The transmitter may disregard the presence or absence of receivers.
C-plane: The control plane of the DECT protocol stacks, which contains all of the internal DECT protocol
control, but may also include some external user information.
NOTE 6: The C-plane stack always contains protocol entities up to and including the network
layer.
call: All of the Network (NWK) layer processes involved in one NWK layer peer-to-peer association.
NOTE 7: Call may sometimes be used to refer to processes of all layers, since lower layer
processes are implicitly required.
cell: The domain served by a single antenna(e) system (including a leaky feeder) of one FP.
NOTE 8: A cell may include more than one source of radiated Radio Frequency (RF) energy
(i.e. more than one radio end point).
Central Control Fixed Part (CCFP): A physical grouping that contains the central elements of a FP. A FP
contains a maximum of one CCFP.
NOTE 9: A CCFP controls one or more RFPs.

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centrex: An implementation of a private telecommunication network exchange that is not located on the
premises of the private network operator. It may be co-located with, or physically a part of a public
exchange.
channel: See physical channel.
cluster: A logical grouping of one or more cells between which bearer handover is possible. A Cluster
Control Function (CCF) controls one cluster.
NOTE 10: Internal handover to a cell which is not part of the same cluster can only be done by
connection handover.
connection: See "MAC connection".
connection handover: The internal handover process provided by the DLC layer, whereby one set of
DLC entities (C-plane and U-plane) can re-route data from one MAC connection to a second new MAC
connection, while maintaining the service provided to the NWK layer.
NOTE 11: Connection handover is DLC frame based.
Connectionless mode (C/L): A transmission mode that transfers one packet (one self contained unit) of
data from one source point to one (or more) destination points in a single phase.
NOTE 12: Connectionless transmissions require the peer-to-peer associations to be prearranged,
and the transmission is unacknowledged at that layer.
Connection Oriented mode (C/O): A transmission mode that transfers data from one source point to one
or more destination points using a protocol based on three phases: "Set-up", "Data transfer" and
"Release".
NOTE 13: C/O mode requires no prearranged associations between peer entities (unlike C/L
mode).
Cordless Radio Fixed Part (CRFP): A Wireless Relay Station (WRS) that provides independent bearer
control to a PT and FT for relayed connections.
coverage area: The area over which reliable communication can be established and maintained.
DECT Network (DNW): A network that uses the DECT air interface to interconnect a local network to one
or more portable applications. The logical boundaries of the DECT network are defined to be at the top of
the DECT NWK layer.
NOTE 14: A DNW is a logical grouping that contains one or more Fixed radio Terminations (FTs)
plus their associated Portable radio Termination (PT). The boundaries of the DECT
network are not physical boundaries.
DLC broadcast: A simplex "connectionless" mode of transmission from the DLC broadcast entity of one
FT to the DLC broadcast entities in one or more PT.
NOTE 15: The transmitter may disregard the presence or absence of receivers.
DLC data link (DLC link): An association between two DLC layer entities. This can either be one C-plane
association or one U-plane association.
NOTE 16: This is not the same as a MAC connection.
DLC frame: The format used to structure all messages that are exchanged between DLC layer peer
entities.
NOTE 17: Different DLC frames are used in the C-plane and the U-plane, and there is more than
one format of DLC frame in each plane.

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double duplex bearer: The use of two duplex bearers (see duplex bearer) which refer to the same MAC
connection, sharing their simplex bearers (see simplex bearer) for the information flow.
double-simplex bearer: The use of two simplex bearers operating in the same direction on two physical
channels. These pairs of channels always use the same RF carrier and always use evenly spaced slots
(i.e. separated by 0,5 Time Division Multiple Access (TDMA) frame).
A double-simplex bearer only exists as part of a multibearer MAC connection.
down-link: Transmission in the direction FT to PT.
duplex bearer: The use of two simplex bearers operating in opposite directions on two physical channels.
These pairs of channels always use the same RF carrier and always use evenly spaced slots (i.e.
separated by 0,5 TDMA frame).
End System (ES): A logical grouping that contains application processes and supports
telecommunication services.
NOTE 18: From the OSI point of view, end systems are considered as sources and sinks of
information.
external handover: The process of switching a call in progress from one FP to another FP.
field: A continuous region of data (i.e. adjacent bits) that jointly convey information. Typically, a message
will contain several fields. If data is not continuous then it is defined as two (or more) fields.
Fixed Part (DECT Fixed Part) (FP): A physical grouping that contains all of the elements in the DECT
network between the local network and the DECT air interface.
NOTE 19: A DECT FP contains the logical elements of at least one FT, plus additional
implementation specific elements.
Fixed radio Termination (FT): A logical group of functions that contains all of the DECT processes and
procedures on the fixed side of the DECT air interface.
NOTE 20: A FT only includes elements that are defined in ETS 300 175 parts 1 to 8 [1] to [8].
This includes radio transmission elements (layer 1) together with a selection of layer 2
and layer 3 elements.
flow control: The mechanism that is used to regulate the flow of data between two peer entities.
fragment: One of the Service Data Units (SDUs) that is produced by the process of fragmentation.
NOTE 21: This is not the same as a segment.
fragmentation: The process of dividing a Protocol Data Unit (PDU) into more than one SDU for delivery
to a lower layer. The reverse process is recombination.
NOTE 22: This is not the same as segmentation.
frame: See TDMA frame or DLC frame.
full slot (slot): One 24th of a TDMA frame which is used to support one physical channel.
generic: A generalised set or general purpose set, often in the sense of basic or ordinary.
geographically unique: This term relates to FP identities, Primary Access Rights Identifiers (PARIs) and
Radio Fixed Part Identifiers (RFPIs). It indicates that two FPs with the same PARI, or respectively two
RFPs with the same RFPI, can not be reached or listened to at the same geographical position.

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Global Network (GNW): A telecommunication network capable of offering a long distance
telecommunication service.
NOTE 23: The term does not include legal or regulatory aspects, nor does it indicate if the
network is a public or a private network.
globally unique identity: The identity is unique within DECT (without geographical or other restrictions).
guard space: The nominal interval between the end of a radio transmission in a given slot, and the start
of a radio transmission in the next successive slot.
NOTE 24: This interval is included at the end of every slot, in order to prevent adjacent
transmissions from overlapping even when they originate with slightly different timing
references (e.g. from different radio end points).
half slot: One 48th of a TDMA frame which is used to support one physical channel.
handover: The process of switching a call in progress from one physical channel to another physical
channel. These processes can be internal (see internal handover) or external (see external handover).
NOTE 25: There are two physical forms of handover, intracell handover and intercell handover.
Intracell handover is always internal, intercell handover can be internal or external.
incoming call: A call received at a PP.
intercell handover: The switching of a call in progress from one cell to another cell.
internal handover: Handover processes that are completely internal to one FT. Internal handover
reconnects the call at the lower layers, while maintaining the call at the NWK layer.
NOTE 26: The lower layer reconnection can either be at the DLC layer (see connection handover)
or at the MAC layer (see bearer handover).
interoperability: The capability of FPs and PPs, that enable a PP to obtain access to teleservices in more
than one location area and/or from more than one operator (more than one service provider).
interoperator roaming: Roaming between FP coverage areas of different operators (different service
providers).
Interworking Unit (IWU): A unit that is used to interconnect subnetworks.
NOTE 27: The IWU will contain the InterWorking Functions (IWF) necessary to support the
required subnetwork interworking.
intracell handover: The switching of a call in progress from one physical channel of one cell to another
physical channel of the same cell.
intraoperator roaming: Roaming between different FP coverage areas of the same operator (same
service provider).
link: See DLC data link.
Local Network (LNW): A telecommunication network capable of offering local telecommunication
services.
NOTE 28: The term does not include legal or regulatory aspects, nor does it indicate if the
network is a public network or a private network.
locally unique identity: The identity is unique within one FP or location area, depending on application.

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location area: The domain in which a PP may receive (and/or make) calls as a result of a single location
registration.
location registration: The process whereby the position of a DECT portable termination is determined to
the level of one location area, and this position is updated in one or more databases.
NOTE 29: These databases are not included within the DECT FT.
logical channel: A generic term for any distinct data path. Logical channels can be considered to operate
between logical end points.
Lower Layer Management Entity (LLME): A management entity that spans a number of lower layers,
and is used to describe all control activities which do not follow the rules of layering.
NOTE 30: The DECT LLME spans the NWK layer, the DLC layer, the MAC layer and the PHL.
MAC bearer (bearer): MAC bearers are the service elements that are provided by each Cell Site Function
(CSF). Each MAC bearer corresponds to a single service instance to the physical layer. See also simplex
bearer, duplex bearer and double simplex bearer.
MAC connection (connection): An association between one source MAC Multi-Bearer Control (MBC)
entity and one destination MAC MBC entity. This provides a set of related MAC services (a set of logical
channels), and it can involve one or more underlying MAC bearers.
multiframe: A repeating sequence of 16 successive TDMA frames, that allows low rate or sporadic
information to be multiplexed (e.g. basic system information or paging).
network (telecommunication network): All the means of providing telecommunication services between
a number of locations where the services are accessed via equipment attached to the network.
node: A point at which switching occurs.
operator (DECT operator): The individual or entity who or which is responsible for operation of one or
more DECT FPs.
NOTE 31: The term does not imply any legal or regulatory conditions, nor does it imply any
aspects of ownership.
outgoing call: A call originating from a PP.
paging: The process of broadcasting a message from a DECT FP to one or more DECT PPs.
NOTE 32: Different types of paging message are possible. For example, the {Request paging}
message orders the recipient to respond with a call set-up attempt.
paging area: The domain in which the PP will be paged as a part of incoming call establishment.
NOTE 33: In general, the paging area will be equal to the Temporary Portable User Identity
(TPUI) domain, since the TPUI is used for paging.
phase: One discrete part of a procedure, where the start and end of the part can be clearly identified (e.g.
by the arrival or dispatch of a primitive).
physical channel (channel): The simplex channel that is created by transmitting in one particular slot on
one particular RF channel in successive TDMA frames. See also simplex bearer.
NOTE 34: One physical channel provides a simplex service. Two physical channels are required
to provide a duplex service.

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Portable Application (PA): A logical grouping that contains all the elements that lie beyond the DECT
network boundary on the portable side.
NOTE 35: The functions contained in the portable application may be physically distributed, but
any such distribution is invisible to the DECT network.
Portable Handset (PHS): A single physical grouping that contains all of the portable elements that are
needed to provide a teleservice to the user.
NOTE 36: PHS is a subset of all possible portable parts. This subset includes all physical
groupings that combine one PT plus at least one portable application in a single
physical box.
Portable Part (DECT Portable Part) (PP): A physical grouping that contains all elements between the
user and the DECT air interface. PP is a generic term that may describe one or several physical pieces.
NOTE 37: A DECT PP is logically divided into one PT plus one or more portable applications.
Portable radio Termination (PT): A logical group of functions that contains all of the DECT processes
and procedures on the portable side of the DECT air interface.
NOTE 38: A PT only includes elements that are defined in ETS 300 175 [1] to [8]. This includes
radio transmission elements (layer 1) together with a selection of layer 2 and layer 3
elements.
primitive: A distinct (but abstract) data element that is passed between adjacent protocol layers.
NOTE 39: A service primitive contains one SDU.
private: An attribute indicating that the application of the so qualified term, e.g. a network, an equipment,
a service, is offered to, or is in the interest of, a determined set of users.
NOTE 40: The term does not include any legal or regulatory aspects, nor does it indicate any
aspects of ownership.
public: An attribute indicating that the application of the so qualified term, e.g. a network, an equipment, a
service, is offered to, or is in the interest of, the general public.
NOTE 41: The term does not include any legal or regulatory aspects, nor does it indicate any
aspects of ownership.
Public Access Profile (PAP): A defined part of this ETS, i.e. ETS 300 175-9 [8] that ensures
interoperability between FPs and PPs for public access services.
public access service: A service that provides access to a public network for the general public.
NOTE 42: The term does not imply any legal or regulatory aspect, nor does it imply any aspects
of ownership.
radio channel: No defined meaning. See RF channel or physical channel.
radio end point: A physical grouping that contains one radio transceiver (transmitter/receiver), fixed or
portable.
NOTE 43: A radio end point may operate only as a receiver or only as a transmitter.
Radio Fixed Part (RFP): One physical sub-group of a FP that contains all the radio end points (one or
more) that are connected to a single system of antennas.
registration: An ambiguous term, that should always be qualified. See either location registration or
subscription registration.

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Repeater Part (REP): A WRS that relays information within the half frame time interval.
RF carrier (carrier): The centre frequency occupied by one DECT transmission.
RF channel: The nominal range of frequencies (RF spectrum) allocated to the DECT transmissions of a
single RF carrier.
roaming: The movement of a PP from one FP coverage area to another FP coverage area, where the
capabilities of the FPs enable the PP to make or receive calls in both areas.
NOTE 44: Roaming requires the relevant FPs and PPs to be interoperable.
roaming service: A service which can be used in more than one FP coverage area.
segment: One of the pieces of data that is produced by the process of segmentation.
NOTE 45: In general, one segment only
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