ETSI ETS 300 175-1 ed.1 (1992-10)
Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1: Overview
Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 1: Overview
DE/RES-03002-1
Radijska oprema in sistemi (RES) – Digitalne evropske brezvrvične telekomunikacije (DECT) – Skupni vmesnik (CI) – 1. del: Pregled
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST ETS 300 175-1 E1:2003
01-december-2003
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Radio Equipment and Systems (RES);Digital European Cordless Telecommunications
(DECT) Common interface Part 1: Overview
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ICS:
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SIST ETS 300 175-1 E1:2003 en
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EUROPEAN ETS 300 175-1
TELECOMMUNICATION October 1992
STANDARD
Source: ETSI TC-RES Reference: DE/RES-3001-1
ICS: 33.060
DECT
Key words:
Radio Equipment and Systems (RES);
Digital European Cordless Telecommunications (DECT)
Common interface
Part 1: Overview
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
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 1992. All rights reserved.
New presentation - see History box
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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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Contents
Foreword.5
1 Scope .7
2 Normative references .7
3 Definitions and abbreviations.9
3.1 Definitions.9
3.2 Abbreviations.17
4 Structure of the ETS.21
4.1 Part 1: Overview.21
4.2 Part 2: Physical layer .22
4.3 Part 3: Medium access control layer.22
4.4 Part 4: Data link control layer.22
4.5 Part 5: Network layer .22
4.6 Part 6: Identities and addressing .22
4.7 Part 7: Security features.22
4.8 Part 8: Speech coding and transmission.22
4.9 Part 9: Public access profile.23
5 The objectives of the ETS.23
6 General description of the system .24
7 Description of the protocol architecture.24
7.1 General.24
7.2 The DECT layered structure.25
7.3 Physical layer .25
7.4 MAC layer.26
7.5 DLC layer.26
7.6 Network layer .26
7.7 Lower Layer Management Entity (LLME).27
7.8 Interworking units.27
8 Proprietary escapes within the common interface .27
8.1 Primary escape routes .27
8.2 Secondary escape routes.28
9 Levels of conformance.28
History.29
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ETS 300 175-1: October 1992
Foreword
This European Telecommunication Standard (ETS) has been produced by the Radio Equipment and
Systems (RES) Technical Committee of the European Telecommunications Standards Institute (ETSI), and
was adopted, having passed through the ETSI standards approval procedure (Public Enquiry 23: 1991-09-
02 to 1991-12-27, Vote 22: 1992-05-25 to 1992-07-17).
The ETS forms part 1 of a series of 9 laying down the arrangements for the Digital European Cordless
Telecommunications (DECT) Common Interface, and provides an overview of the whole ETS.
The following aspects of this ETS are subject to controlled distribution:
a) DECT identities, as defined in Part 6;
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
document.
Further details of the DECT system may be found in ETSI Technical Reports, ETR 015 [16] and ETR 043
[15], and also in draft ETSI Technical Report: "Digital European Cordless Telecommunications System
description document [17]".
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ETS 300 175-1: October 1992
1 Scope
This part of ETS 300 175 gives an introduction and overview of the complete Digital European Cordless
Telecommunications (DECT) Common Interface.
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 Common Interface;
- 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 European Telecommunication Standard (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 300 175-1: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 1: Overview".
[2] ETS 300 175-2: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 2: Physical layer".
[3] ETS 300 175-3: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 3: Medium
access control layer".
[4] ETS 300 175-4: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 4: Data link
control layer".
[5] ETS 300 175-5: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 5: Network
layer".
[6] ETS 300 175-6: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 6: Identities and
addressing".
[7] ETS 300 175-7: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 7: Security
features".
[8] ETS 300 175-8: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 8: Speech coding
and transmission".
[9] ETS 300 175-9: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Common Interface Part 9: Public access
profile".
[10] Reserved.
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[11] Reserved.
[12] I-ETS 300 176: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT) Approval test specification".
[13] Reserved for future ETS version of [12].
[14] CEPT Recommendation T/SGT SF2 (89) 6/0: "Draft Recommendation T/SF
Services and Facilities of Digital European Cordless Telecommunications".
[15] ETR 043: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT) Common interface Services and facilities
requirements specification".
[16] ETR 015: "Digital European Cordless Telecommunications Reference
document".
[17] Draft Technical Report: "Digital European Cordless Telecommunications System
description document".
[18] ETR 042: "Radio Equipment and Systems; Digital European Cordless
Telecommunications (DECT) A Guide to the DECT features that influence the
traffic capacity and the maintenance of high radio link transmission quality,
including the results of simulations".
[19] Reserved for future DECT related document.
[20] CCIR Report 662 (1978): "Definition of spectrum use and efficiency".
[21] CCITT Recommendation X.200 (1988): "Reference Model of Open Systems
Interconnection for CCITT applications".
[22] CCITT Recommendation X.210 (1988): "OSI layer service conventions".
[23] ECMA TR/44 (1989): "An architectural framework for private networks".
[24] CCITT Recommendation T.50 (1988): "International Alphabet No. 5".
[25] International Standard ISO.2022 (1986 E): "Information processing - ISO
7-bit and 8-bit coded character sets - Code extension techniques".
[26]-[28] Reserved.
[29] European Telecommunication Standard ETS 300 102-1: "ISDN User-network
interface layer; Specification for basic call control".
[30] European Telecommunication Standard ETS 300 102-2: "ISDN User-network
interface layer 3 Specification Description Language (SDL) diagrams".
[31] ETS 300 133-1 to -7: "Paging Systems (PS); European Radio Message System
(ERMES)".
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3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply.
Antenna 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 within the coverage area of a fixed part to which it has
access rights, notifies this fixed part that it is operative. The reverse process is detach, which reports the
portable part as inoperative.
NOTE: An operative portable part 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 fixed part.
NOTE: 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: 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: 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: 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: 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 network layer peer-to-peer association.
NOTE: 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 feader) of one fixed part.
NOTE: 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 fixed part.
A fixed part shall contain a maximum of one CCFP.
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NOTE: A CCFP controls one or more RFPs.
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: 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 reroute data from one MAC connection to a second new MAC
connection, while maintaining the service provided to the network layer.
NOTE: 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: 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: Connection oriented mode requires no prearranged associations between peer entities
(unlike C/L mode).
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 network layer.
NOTE: A DECT NetWork (DNW) is a logical grouping that contains one or more fixed radio
terminations plus their associated portable radio termination. 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
fixed radio termination to the DLC broadcast entities in one or more portable radio terminations.
NOTE: 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: 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: 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-simplex bearer: the use of two simplex bearers operating in the same direction on two physical
channels. These pairs of channels shall always use the same RF carrier and shall always use evenly
spaced slots (i.e. separated by 0,5 Time Division Multiple Access (TDMA) frame).
A double-simplex bearer shall only exist 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 shall always use the same RF carrier and shall 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: 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 fixed radio termination to another
fixed radio termination.
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 shall be 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: A DECT fixed part contains the logical elements of at least one fixed radio termination,
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: A fixed radio termination only includes elements that are defined in ETS 300 175. 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 that is produced by the process of fragmentation.
NOTE: This is not the same as a segment.
Fragmentation: the process of dividing a protocol data unit into more than one service data unit for
delivery to a lower layer. The reverse process is recombination.
NOTE: 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 fixed part identities, PARIs and RFPIs. It indicates that two
fixed parts with the same PARI, or respectively two RFPs with the same RFPI, can not be reached or
listened to at the same geographical position.
NOTE: PARI stands for Primary Access Rights Identifier, RFPI stands for Radio Fixed Part
Identifier.
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Global NetWork (GNW): a telecommunication network capable of offering a long distance
telecommunication service.
NOTE: 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: 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: There are two physical forms of handover, intra-cell handover and inter-cell handover.
Intra-cell handover is always internal, inter-cell handover can be internal or external.
Incoming call: a call received at a portable part.
Inter-cell handover: the switching of a call in progress from one cell to another cell.
Internal handover: handover processes that are completely internal to one fixed radio termination.
Internal handover reconnects the call at the lower layers, while maintaining the call at the NWK layer.
NOTE: 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 fixed parts and portable parts, that enable a portable part 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 fixed part coverage areas of different operators (different
service providers).
InterWorking Unit (IWU): a unit that is used to interconnect subnetworks.
NOTE: The IWU will contain the InterWorking Functions (IWF) necessary to support the
required subnetwork interworking.
Intra-cell 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 fixed part 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: 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 portable part 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: These databases are not included within the DECT fixed radio termination.
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: The DECT LLME spans the network layer, the DLC layer, the MAC layer and the
physical layer.
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 fixed parts.
NOTE: 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 portable part.
Paging: the process of broadcasting a message from a DECT fixed part to one or more DECT portable
parts.
NOTE: 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 portable part will be paged as a part of incoming call establishment.
NOTE: 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: 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: 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: PHS is a subset of all possible portable parts. This subset includes all physical
groupings that combine one portable radio termination 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. portable part is a generic term that may describe one or several physical
pieces.
NOTE: A DECT portable part is logically divided into one portable termination 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: A portable radio termination only includes elements that are defined in ETS 300 175.
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: 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: 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: 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 ETS 300 175 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: 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.
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