ETSI ETS 300 499 ed.1 (1996-09)

SLOVENSKI STANDARD
SIST ETS 300 499:1998
01-september-1998
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Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
communications (GSM); DECT/GSM Interworking Profile (IWP); Mobile services
Switching Centre (MSC) - Fixed Part (FP) interconnection
Ta slovenski standard je istoveten z: ETS 300 499 Edition 1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
'(&7
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 499:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 499:1998

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SIST ETS 300 499:1998
EUROPEAN ETS 300 499
TELECOMMUNICATION September 1996
STANDARD
Source: ETSI TC-RES Reference: DE/RES-03049
ICS: 33.020, 30.060.50
Key words: DECT, GSM, interworking
Radio Equipment and Systems (RES);
Digital Enhanced Cordless Telecommunications/
Global System for Mobile Communications
(DECT/GSM) interworking profile;
Mobile services Switching Centre (MSC) -
Fixed Part (FP) interconnection
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: secretariat@etsi.fr
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 1996. All rights reserved.

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ETS 300 499: 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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Contents
Foreword .5
Introduction.5
1 Scope .7
2 Normative references.7
3 Definitions and abbreviations .9
3.1 DECT definitions.9
3.2 Abbreviations .9
4 General.10
5 FP-MSC interface.10
5.1 General aspects (ETS 300 587-1, GSM 08.01).10
5.2 Interface principles (ETS 300 587-2, GSM 08.02).10
5.3 Layer 1 specification (ETS 300 588, GSM 08.04).11
5.4 Signalling transport mechanism (ETS 300 589, GSM 08.06).11
6 Application to layer 3 interface structures .12
6.1 The FP operation and maintenance application part .12
6.2 The DCMAP.12
6.3 The FP Management Application Part, FPMAP .12
6.4 Handling of abnormal events related to the FPAP header .12
7 The FP management application part.13
7.1 FPMAP procedures.13
7.1.1 Assignment procedure .13
7.1.1.1 Successful operation .14
7.1.2 Assignment failure.14
7.1.2.1 Abnormal conditions .14
7.1.3 Blocking and unblocking.15
7.1.4 Reset .15
7.1.4.1 Global reset procedure .15
7.1.4.2 Reset circuit.15
7.1.5 Release .15
7.1.5.1 Release due to transaction completion .15
7.1.5.2 Release due to FP generated reasons.15
7.1.6 Paging .16
7.1.7 Trace invocation.16
7.1.8 Flow control .16
7.1.8.1 Philosophy .16
7.1.8.2 Processor overload at the MSC.16
7.1.8.3 Processor overload at the FP .16
7.1.8.4 Message throughput congestion .16
7.1.9 Cipher mode control.17
7.1.9.1 Successful operation .17
7.1.9.2 Unsuccessful operation .17
7.1.10 General SCCP abnormal conditions .17
7.1.11 Initial PP message.18
7.1.12 Data link control SAPI not equal to <<0>> .18
7.1.12.1 Messages with SAPI value not equal to 0 across the MSC
FP interface .18
7.1.12.1.1 FP to MSC direction.18
7.1.12.1.2 MSC to FP direction.18

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7.1.13 Internal handover. 18
7.1.14 External handover. 18
7.1.15 Load indication. 19
7.1.16 FPMAP error handling . 19
7.2 Messages and coding . 19
7.2.1 FPMAP messages on the A-interface . 19
7.2.2 FPMAP information elements on the A-interface . 21
7.2.3 FPMAP information element coding values on the A-interface . 23
7.3 Exceptions for FPMAP procedures, message contents and information element coding
values used on the A-interface. 23
7.3.1 FPMAP procedures, exceptions to BSSMAP procedures . 23
7.3.2 FPMAP messages, exceptions to BSSMAP procedures. 23
7.3.3 FPMAP information element coding . 24
7.4 FPMAP timers in the FPMAP procedures. 25
Annex A (normative): FPMAP procedures associated with BSSMAP procedures. 26
Annex B (normative): FPMAP message per FPMAP procedure associated with BSSMAP message. 27
Annex C (informative): Bibliography . 29
History. 30

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ETS 300 499: September 1996
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).
Transposition dates
Date of adoption of this ETS: 23 August 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
Introduction
This ETS is a part of a set of standards for the Digital Enhanced Cordless Telecommunications / Global
System for Mobile Communications (DECT/GSM) Interworking Profile (IWP) concept that includes:
- general description of service requirements, functional capabilities and information flows,
ETS 300 466 [7];
- access and mapping (protocol/procedure description for 3,1 kHz speech service), ETS 300 370 [6];
- GSM Phase 2 supplementary services implementation, ETS 300 703 [8];
- GSM MSC - DECT Fixed Part (FP) interconnection, (this ETS).
Other standards of the DECT/GSM IWP are expected to describe (see annex C):
- implementation of bearer services, ETS 300 756 [14];
- implementation of short message services, point-to-point and cell broadcast, ETS 300 764 [13];
- implementation of facsimile group 3, DE/RES-03072 [19].
This ETS is based on Digital Enhanced Cordless Telecommunications (DECT) Common Interface
specification ETS 300 175 [18] and ETS 300 370 [6] to enable DECT terminals to interwork in the public
and private environment with DECT systems which are connected to a Global System for Mobile
communications (GSM) core infrastructure. From the GSM side this ETS is based upon the specifications
of the GSM 08.0X series of Technical Specifications (TSs) [1] to [5]. Information on DECT access to the
GSM PLMN may be found in ETR 159 [9]. Further details on the DECT system may be found in
ETR 015 [10], ETR 043 [11], and ETR 056 [12].

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1 Scope
This European Telecommunication Standard (ETS) is a part of the Digital Enhanced Cordless
Telecommunications / Global System for Mobile Communications (DECT/GSM) Interworking Profile (IWP)
and specifies the interface used between the Digital Enhanced Cordless Telecommunications (DECT)
Fixed Part (FP) and the Global System for Mobile communications (GSM) Mobile Switching Centre
(MSC). This ETS specifies the exceptions to theGSM 08.0X series of Technical Specifications (TSs) [1]
to [5] and only places requirements on the DECT FP.
For the purposes of Call Control (CC) and Mobility Management (MM), most messages are not
interpreted, but relayed to the underlying DECT radio sub-system. Some messages may however be
interpreted and handled at the interconnection. The DECT access protocols and a particular set of FP
interworking functions/mappings to ensure that the GSM services can be provided over DECT are
specified in ETS 300 370 [6] and ETS 300 466 [7].
The DECT sub-system uses the A-interface in the respect that the FP emulates a GSM Base Station
Controller (BSC). This ETS covers the handling of procedures that are applicable on the A-interface in
order to ensure an appropriate GSM BSC emulation. It also covers error conditions at the interface,
handling of timers and handling of message headers that are required for the correct addressing of
messages.
Interworking between the DECT FP and the GSM MSC via other interfaces is outside the scope of this
ETS.
2 Normative references
This ETS incorporates by dated and 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 300 587-1: "European digital cellular telecommunications system
(Phase 2); Base Station System - Mobile-services Switching Centre (BSS -
MSC) interface; General aspects (GSM 08.01)".
[2] ETS 300 587-2: "European digital cellular telecommunications system
(Phase 2); Base Station System - Mobile-services Switching Centre (BSS -
MSC) interface; Interface principles (GSM 08.02)".
[3] ETS 300 588 : "European digital cellular telecommunications system (Phase 2);
Base Station System - Mobile-services Switching Centre (BSS - MSC) interface;
Layer 1 specification (GSM 08.04)".
[4] ETS 300 589 : "European digital cellular telecommunications system (Phase 2);
Signalling transport mechanism specification for the Base Station System - Mobile-
services Switching Centre (BSS - MSC) interface (GSM 08.06)".
[5] ETS 300 590: "Digital cellular telecommunications system (Phase 2); Mobile-
services Switching Centre - Base Station System (MSC - BSS) interface;
Layer 3 specification (GSM 08.08)".
[6] ETS 300 370: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications/Global System for Mobile communications
(DECT/GSM) inter-working profile; Access and mapping (Protocol/procedure
description for 3,1 kHz speech service)".
[7] ETS 300 466: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications/Global System for Mobile Communications
(DECT/GSM) interworking profile; General description of service requirements;
Functional capabilities and information flows".

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[8] ETS 300 703: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications/Global System for Mobile communications
(DECT/GSM) Interworking Profile (IWP); GSM phase 2 supplementary services
implementation".
[9] ETR 159: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); Wide area mobility using the Global System for
Mobile communications (GSM)".
[10] ETR 015: "Radio Equipment and Systems; Digital European Cordless
Telecommunications (DECT); Reference document".
[11] ETR 043: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); Common interface; Services and facilities
requirements specification".
[12] ETR 056: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); System description document".
[13] ETS 300 764: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications / Global System for Mobile communications
(DECT/GSM) inter-working profile; Implementation of short message service,
point-to-point and cell broadcast".
[14] ETS 300 756: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications / Global System for Mobile communications
(DECT/GSM) interworking profile; Implementation of bearer services".
[15] ETS 300 704-1: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications/Global System for Mobile communications
(DECT/GSM) Interworking Profile (IWP; Profile Implementation Conformance
Statement (ICS)); Part 1: Portable radio Termination (PT)".
[16] ETS 300 704-2: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications/Global System for Mobile communications
(DECT/GSM) interworking Profile (IWP; Profile Implementation Conformance
Statement (ICS)); Part 2: Fixed radio Termination (FT)".
[17] ETS 300 702: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications / Global System for Mobile communications
(DECT/GSM) interworking profile".
[18] ETS 300 175: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI)".
[19] DE/RES-03072: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications/Global System for Mobile Communications
(DECT/GSM) interworking profile; Implementation of facsimile group 3".

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3 Definitions and abbreviations
3.1 DECT definitions
This subclause only includes DECT definitions valid for this ETS. A complete list of DECT definitions may
be found in ETS 300 370 [6].
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 (NWK) layer.
NOTE 1: 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.
Fixed Part (FP), DECT FP: A physical grouping that contains all of the elements in the DECT network
between the local network and the DECT air interface.
NOTE 2: A DECT FP contains the logical elements of at least one FT, plus additional
implementation specific elements.
Fixed Part GSM PLMN attachment (DECT fixed part attached to a GSM MSC): A definition of a
functional environment where a DECT system (FP) is attached to a GSM MSC. The MSC in this case
refers to a functional entity providing the required MM and CC functionality defined in this ETS in order to
communicate with the FP.
Interworking Unit (IWU): A unit that is used to interconnect sub-networks.
NOTE 3: The IWU will contain the inter-working functions necessary to support the required
sub-network interworking.
Portable Part (PP), DECT 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 4: A DECT PP is logically divided into one portable termination plus one or more portable
applications.
3.2 Abbreviations
For the purposes of this ETS the following abbreviations apply:
BSC GSM Base Station Controller
BSSAP Base Station System Application Part
BSSMAP GSM Base Station System - Mobile Application Part
BSSOMAP Base Station System Operation and Maintenance Part
DCMAP DECT Connection and Mobility Application Part
DECT Digital Enhanced Cordless Telecommunications
DLCI Data Link Connection Identifier
DTAP Direct Transfer Application Part
FP Fixed Part
FPAP Fixed Part Application Part
FPMAP Fixed Part Management Application Part
FPOMAP Fixed Part Operation and Maintenance Application Part
GSM Global System for Mobile Communications
IPEI International Portable Equipment Identity
IWU Interworking Unit
MM Mobility Management, a NWK layer functional grouping
MS Mobile Station
MSC Mobile Switching Centre
MTP Message Transfer Part
NWK Network layer
O&M Operations & Maintenance

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PLMN Public Land Mobile Network
PP Portable Part
SAPI Service Access Point Identifier
SCCP Signalling Connection Control Part
TS GSM Technical Specification
4 General
This ETS is structured in the same way as GSM 08.0X series of TSs [1] to [5], but contained in a single
document, i.e. each applicable GSM 08.0X TS [1] to [5] is included as a subclause in this ETS. Only the
exceptions to the GSM 08.0X TSs [1] to [5] are specified in these subclauses.
5 FP-MSC interface
5.1 General aspects (ETS 300 587-1, GSM 08.01)
The FP-MSC interface shall be capable of supporting all the services offered to a DECT user with a GSM
subscription.
The MSC to FP interface recommendation shall allow the following:
a) connection of various manufactures FPs to the same MSC;
b) the use of the same FPs in any PLMN;
c) support of all services defined in ETS 300 370 [6] and ETS 300 466 [7].
The MSC to FP interface is specified by a set of characteristics, including:
a) physical parameters;
b) procedures.
The definition of the MSC to FP interface follows a layered approach almost identical to that used for the
A-interface.
5.2 Interface principles (ETS 300 587-2, GSM 08.02)
This subclause gives the principles on which the detailed interface specifications in the rest of this ETS
are based.
The set of fixed equipment accessed from the MSC through one particular instance of the interface will be
referred to as a DECT FP. A FP ensures the coverage of (n) DECT Radio Fixed Parts (RFPs), where (n)
can be one or more.
The interface is based on the use of one or more 2 048 kbit/s digital transmission system interfaces.
Each 2 048 kbit/s interface provides 31 x 64 kbit/s channels that can be used for traffic or signalling as the
operator requires. The DECT radio path traffic channel is at a rate of 32 kbit/s.
A rate adapting function is thus needed for the rate conversion. This rate adapting function is considered
As there is only one rate adaption
to be a part of the FP, but could physically be located at the MSC's site.
required on the MSC-FP interface, there is no need for the support of groups of circuits (circuit pools)
having different capabilities.
The functional split between the FP and the MSC are similar to the functional split between a BSC and a
MSC. Since DECT has a completely different radio management that does not use interworking, the
number of functions handled by the FP will be less than for a GSM BSC.

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The following functions shall be handled by the FP:
- terrestrial channel management;
- user data encryption;
- signalling element encryption;
- radio management;
- transcoding and rate adaption.
Signalling messages are classified under the three following headings:
- DECT Connection and Mobility Application Part (DCMAP) messages Fixed Part Application Part
(FPAP) messages;
- Fixed Part Management Application Part (FPMAP) messages FPAP messages;
- Fixed Part Operation and Maintenance Application Part (FPOMAP).
DCMAP, FPMAP and FPAP are defined in clause 6.
The definition of the MSC to FP interface follows a layered approach, as shown in figure 1.
O ther applications
IW U
FPAP BSSAP
BSS
DTA P
DCM A P FP M A P
MAP
DE CT
p rotoc o ls
D istrib u tio n D istribution
function FP function BSS
OM AP OMAP
SCCP SCCP
MTP MTP
Physical m edia
DECT FP
G SM MSC
BSSOMAP: Base Station System Operation and Maintenance Part
Figure 1: MSC to FP interface
5.3 Layer 1 specification (ETS 300 588, GSM 08.04)
The FP-MSC Interface - Layer 1 specification is identical with the BSS-MSC Interface - Layer 1
specification as specified in ETS 300 588 [3] (GSM 08.04).
5.4 Signalling transport mechanism (ETS 300 589, GSM 08.06)
The FP-MSC Interface - Signalling transport mechanism is identical with the BSS-MSC Interface -
signalling transport mechanism as specified in ETS 300 589 [4] (GSM 08.06) with the following
exceptions:
- all appearances of Base Station System Application Part (BSSAP), Direct Transfer Application Part
(DTAP) and GSM Base Station System - Mobile Application Part (BSSMAP) shall be replaced with
FPAP, DCMAP and FPMAP respectively.

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6 Application to layer 3 interface structures
The underlying transport mechanism defined to carry signalling information between the FP and the MSC
is the Message Transfer Part (MTP), and the Signalling Connection Control Part (SCCP) of signalling
system No. 7.
The MTP and SCCP are used to support communication between the MSC and two conceptual entities
within the FP. These are:
- FP Operation and Maintenance Application Part (FPOMAP); and
- FP Application Part (FPAP).
The FPAP is split into two sub-application parts. These are:
- FP Management Application Part (FPMAP); and
- DECT Connection and Mobility Application Part (DCMAP).
The set of FPMAP procedures shall be seen as a subset of the BSSMAP procedures on the FP side of
the MSC-FP interface (called A-interface for similarity reasons with the MSC-BSC interface).
As it is considered that the MSC is not aware of interfacing an FP, it may use BSSMAP procedures that
are not defined as FPMAP procedures. The FP will then apply the corresponding error handling defined in
subclause 7.1.16. The same applies for BSSMAP messages, information elements and coding values that
are not defined as FPMAP messages, information elements and coding values, respectively.
In this ETS, a BSSMAP procedure defined in ETS 300 590 [5] (GSM 08.08) is defined as applicable when
at least both entities (MSC and FP) are able to identify it. This procedure is then defined as a FPMAP
procedure.
In the direction MSC -> FP, all information elements are applicable. This means that the FP shall at least
be able to ignore the information elements. In the direction MSC -> FP, some information element coding
values are not applicable. This means that the FP shall be able to apply the correct error handling defined
in this specification when a non-applicable value is met by the FP.
When there is an exception to any procedure in ETS 300 590 [5] (GSM 08.08) the entire procedure is re-
written.
6.1 The FP operation and maintenance application part
If operation and maintenance messages are transferred by means of this interface they shall use SCCP
messages. FPOMAP is for further study.
6.2 The DCMAP
The DCMAP is used to transfer Connection Management and Mobility Management information between
the MSC and the PP. An interworking function in the FP handles the mapping of protocol entities between
the DCMAP and the DECT radio interface protocols. This interworking is specified in ETS 300 370 [6] and
ETS 300 466 [7].
The set of DCMAP procedures is a subset of the DTAP Connection and MM procedures.
6.3 The FP Management Application Part, FPMAP
The FPMAP supports all of the procedures between the MSC and the FP that require interpretation and
processing of information related to single calls and management of terrestrial resources.
6.4 Handling of abnormal events related to the FPAP header
The handling of the FPAP header is identical with the handling of the BSSAP header as specified in TS
ETS 300 590 [5] (GSM 08.08).

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7 The FP management application part
7.1 FPMAP procedures
The BSSMAP procedures (see ETS 300 590 [5] (GSM 08.08)) applicable, to some extent, on the
A-interface and called FPMAP procedures are:
* Assignment;
# Blocking;
# Reset;
* Handover required indication;
* Handover resource allocation;
* Handover execution;
* Release;
# Paging;
# Flow control;
* Cipher mode control;
* Trace invocation;
* Initial PP message;
* Data link control SAPI not equal to 0;
# Reset circuit;
* Internal handover;
# Load indication.
NOTE: Each of the above procedures are qualified by either an asterisk (*) or as a hash
symbol (#). The hash (#) symbol denotes a global procedure that concerns a complete
FP or specific terrestrial circuits. The asterisk (*) symbol denotes a dedicated
procedure that concerns a single PP.
In addition to these procedures, the procedures for error handling are also specified.
All BSSMAP messages related to other BSSMAP procedures shall be considered as messages with non-
existent message type if received by the FP.
Messages used to support global procedures are sent using the connectionless services of the SCCP.
Messages used to support dedicated procedures are sent using the connection oriented services of the
SCCP, on the connection that has been set up to support that call or transaction. The establishment of
SCCP connections is detaile
...