SIST EN 301 242 V1.1.3:2005

• Abstract:

  To secify radio and network aspects related to dual-mode terminals. This EN will, in conjuction with other standards and TBRs, form the ba sis for the first edition of TBR 39, i.e. basic dual-mode terminals th at only consist of a DECT art and a GSM part and that may automaticall y switch between DECT and GSM modes. (Advanced dual-mode terminals, wh ere the DECT and GSM parts are further integrated, will be considered in a TR (DTR/DECT-010096). The same considerations apply for dual-mode DECT/DCS1800 terminals and for DECT/GSM/DCS1800 dual mode/dual band terminals. The term GSM is considered to cover all the frequency bands, and combinations of frequency bands allowed for GSM type equipment, i.e. P-GSM, E-GSM, R-G SM, DCS1800 or dual band GSM/DCS.

• Status: Published
• Publication Date: 30-Jun-2005
• ICS: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: RES - Radio equipment and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2005
• Due Date: 01-Jul-2005
• Completion Date: 01-Jul-2005
• Ref Project: ETSI EN 301 242 V1.1.3 (1998-06) - Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile communications (GSM); DECT/GSM integration based on dual-mode terminals

SIST EN 301 242 V1.1.3:2005 is the Slovenian adoption of EN 301 242 Version 1.1.3 from ETSI, for Digital Enhanced Cordless Telecommunications (DECT) and Global System for Mobile communications (GSM). It specifies the radio and network aspects for basic DECT/GSM dual-mode terminals (DMTs) that can switch between DECT and GSM modes, and it is intended for use together with the related DECT and GSM standards and test requirements.

What does SIST EN 301 242 V1.1.3:2005 specify?

SIST EN 301 242 V1.1.3:2005 specifies the additional requirements needed for DECT/GSM dual-mode terminals that can do background scanning and switch automatically or manually between modes, while not being active in both modes at the same time. Clause 4 sets the general operating model, Clause 5 covers continuity of service and mode selection, Annex A covers testing, and Annex B defines the timers and constants used for mode switching.

Annex	What it covers
Annex A	Testing of DECT/GSM DMTs, including radio, acoustic, protocol and EMC testing
Annex B	Timers and constants for controlling repeated mode switching

The document applies the DECT/GSM integration rules to basic DMTs and leaves out the DECT/GSM Interworking Profile. It also treats GSM as covering the allowed GSM frequency bands and band combinations mentioned in the scope.

What are the key requirements of SIST EN 301 242 V1.1.3:2005?

SIST EN 301 242 V1.1.3:2005 requires the terminal to behave like a single-mode terminal in whichever mode is currently active. In practice, that means the GSM side follows the relevant GSM rules and the DECT side follows the relevant DECT rules, except where the standard adds special DMT behavior such as background scanning.

Clause 4 requires the DMT to leave one mode before entering the other, as if one single-mode terminal were switched off before the other is switched on. This matters because attach, detach and other service-control actions follow the normal single-mode behavior instead of a merged procedure.

Clause 4 also says that in DECT mode it must be possible to switch to GSM mode to make an emergency call. For users, that means GSM remains available as a fallback path even when the terminal is operating as DECT.

Clause 5 requires both manual mode selection and automatic mode selection, and the terminal must show the user which mode is currently in use. The user must also be able to change the selection mechanism, and the chosen mode or preferred mode can be changed when the terminal is not in active communication.

Background scanning is a central method in Clause 5.2.2.2. SIST EN 301 242 V1.1.3:2005 defines it as checking for usable networks in the other mode without leaving the current active mode, including access-right checks and coverage stability checks. In practice, this lets the terminal look for a better network while the current service continues.

Clause 5.2.2.3 sets the automatic mode-selection logic. The terminal follows the user’s preferred mode, switches when coverage is lost, and uses the background scan results only when they point to a suitable stable network. The standard also adds protection against excessive signalling by limiting how often repeated automatic switching can happen.

Clause 5.2.2.4 says location registration in each mode follows the relevant single-mode standards, and mode change behaves like switching off one terminal and switching on another. Clause 5.2.2.5 lets the user force GSM or DECT mode, or re-select the mode, when not in active communication.

Annex A adds the test approach. It says the DECT and GSM test specifications are generally applied separately, while the DMT is tested in one mode and background scanning may be running in the other mode. That matters because test labs must verify that background scanning does not disturb radio performance, speech performance, protocol behavior or EMC behavior.

Annex B defines the timer and constant used to control repeated non-preferred to preferred mode loops. Those names are part of the switching rule set and are useful for implementation and conformance checking.

What terms does SIST EN 301 242 V1.1.3:2005 define?

• Dual mode terminal (DMT): a terminal that contains both GSM and DECT parts.
• Active communication: a state where a communication link has been established between the DMT and a fixed part in either mode.
• Active mode: GSM or DECT after that mode has been selected and its switch-on procedures have been performed.
• Background scanning: the process of looking for stable networks in the other mode while staying in the current mode.
• Mode selection: the DMT procedure used to choose GSM or DECT operating mode.
• GSM coverage: the sum of GSM public land mobile network coverage where the DMT has at least limited service.
• Subscriber Identity Module (SIM): the GSM identity module used for access and PIN-related behavior in the terminal.

Who uses SIST EN 301 242 V1.1.3:2005?

SIST EN 301 242 V1.1.3:2005 is used by terminal manufacturers, radio and protocol engineers, and integrators who design DECT/GSM dual-mode handsets or similar terminals. It is also used by test laboratories, certification bodies, quality managers and buyers who need to check how a DMT should switch modes, register on networks, and be tested against the related DECT and GSM requirements.

Which standards are used with SIST EN 301 242 V1.1.3:2005?

• ETS 300 511 / GSM 02.30 - gives the GSM man-machine interface behavior used for PIN entry.
• ETS 300 607-1 / GSM 11.10-1 - provides GSM conformance requirements used for switch-on, switch-off and related terminal behavior.
• EN 300 175 parts 1 to 8 - provide the DECT Common Interface framework used for DECT operation.
• EN 300 444, ETS 300 824 and ETS 300 434-2 - provide the DECT GAP, CAP and IAP profile bases named for the DECT side of the DMT.
• TBR 6, TBR 10, TBR 19, TBR 20, TBR 22, TBR 31, TBR 32 and TBR 40 - provide the attachment and test requirements applied to the DECT and GSM parts.
• TR 101 072 and ETR 341 - give the integration background and DECT/GSM interworking profile overview.
• EN 301 439 - is the harmonized attachment requirements document for DECT/GSM dual-mode terminal equipment.
• ITU-T Recommendation G.111 - is referenced for loudness ratings in acoustic evaluation.

What does the SIST EN 301 242 V1.1.3:2005 document contain?

SIST EN 301 242 V1.1.3:2005 contains the operating rules for mode switching, continuity of service and network access, plus the testing guidance needed to verify those rules. Figures in Clause 5 illustrate the mode-selection cycles and the background-scanning cycle. Annex A organizes testing into radio, acoustic, protocol and EMC sections, and Annex B provides the timer and constant used to limit repeated switching.

SLOVENSKI STANDARD
01-julij-2005
'LJLWDOQHL]EROMãDQHEUH]YUYLþQHWHOHNRPXQLNDFLMH'(&7*OREDOQLVLVWHP
PRELOQLKNRPXQLNDFLM*60,QWHJUDFLMD'(&7*60GYR]YUVWQLWHUPLQDOL
Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
communications (GSM); DECT/GSM integration based on dual-mode terminals
Ta slovenski standard je istoveten z: EN 301 242 Version 1.1.3
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)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 301 242 V1.1.3 (1998-06)
European Standard (Telecommunications series)
Digital Enhanced Cordless Telecommunication (DECT);
Global System for Mobile communications (GSM);
DECT/GSM integration based on dual-mode terminals

2 EN 301 242 V1.1.3 (1998-06)
Reference
DEN/DECT-010124 (bi000ie0.PDF)
Keywords
DECT, GSM, radio, terminal
ETSI
Postal address
F-06921 Sophia Antipolis Cedex - FRANCE
Office address
650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE
Tel.: [phone]  Fax: [phone]
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Internet
[e-mail]
http://www.etsi.fr
http://www.etsi.org
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 1998.
All rights reserved.
ETSI
3 EN 301 242 V1.1.3 (1998-06)
Contents
Intellectual Property Rights.4
Foreword .4
1 Scope.5
2 References.5
3 Definitions and abbreviations .7
3.1 Definitions . 7
3.2 Abbreviations. 7
4 General on DECT/GSM DMTs .8
5 Provisions for providing continuity of service.8
5.1 General. 8
5.2 Mode selection. 9
5.2.1 General requirements . 9
5.2.2 Procedures. 9
5.2.2.1 At switch-on. 9
5.2.2.2 Background scanning. 9
5.2.2.3 Automatic mode selection . 10
5.2.2.3.1 Preferred use of GSM networks. 10
5.2.2.3.2 Preferred use of DECT networks . 11
5.2.2.3.3 Protection against excessive signalling . 11
5.2.2.4 Location registration. 11
5.2.2.5 User re-selection of mode. 12
Annex A (normative): Testing of DECT/GSM DMTs.13
A.1 Radio testing .13
A.2 Acoustic testing.14
A.3 Protocol testing .15
A.4 EMC testing .15
Annex B (normative): Timers and constants .16
B.1 Timers .16
B.2 Constants.16
History.17
ETSI
4 EN 301 242 V1.1.3 (1998-06)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETR 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of
ETSI standards", which is available free of charge from the ETSI Secretariat. Latest updates are available on the ETSI
Web server (http://www.etsi.fr/ipr or http://www.etsi.org/ipr).
Pursuant to the ETSI Interim IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No
guarantee can be given as to the existence of other IPRs not referenced in ETR 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This European Standard (Telecommunications series) has been produced by ETSI Project Digital Enhanced Cordless
Telecommunications (DECT).
National transposition dates
Date of adoption of this EN: 5 June 1998
Date of latest announcement of this EN (doa): 30 September 1998
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 March 1999
Date of withdrawal of any conflicting National Standard (dow): 31 March 1999
ETSI
5 EN 301 242 V1.1.3 (1998-06)
1 Scope
The purpose of the present document is to specify the additional requirements to the existing Global System for Mobile
communications (GSM) and Digital Enhanced Cordless Telecommunication (DECT) standards needed for DECT/GSM
Dual Mode Terminals (DMTs) that can perform background scanning and switch automatically between GSM and
DECT modes, but cannot be active in both modes at the same time.
For the DECT side, the DECT/GSM Interworking Profile (IWP) is not considered.
2 References
References may be made to:
a) specific versions of publications (identified by date of publication, edition number, version number, etc.), in
which case, subsequent revisions to the referenced document do not apply; or
b) all versions up to and including the identified version (identified by "up to and including" before the version
identity); or
c) all versions subsequent to and including the identified version (identified by "onwards" following the version
identity); or
d) publications without mention of a specific version, in which case the latest version applies.
A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same
number.
[1] ETS 300 434-2: "Digital Enhanced Cordless Telecommunications (DECT); Integrated Services
Digital Network (ISDN); DECT/ISDN interworking for end system configuration; Part 2: Access
profile".
[2] EN 300 444: "Digital Enhanced Cordless Telecommunications (DECT); Generic Access Profile
(GAP)".
[3] ETS 300 511: "European digital cellular telecommunications system (Phase 2); Man-Machine
Interface (MMI) of the Mobile Station (MS) (GSM 02.30)".
[4] ETS 300 607-1: "Digital cellular telecommunications system (Phase 2); Mobile Station (MS)
conformance specification; Part 1: Conformance specification (GSM 11.10-1)".
[5] ETS 300 824: "Digital Enhanced Cordless Telecommunications (DECT); Cordless Terminal
Mobility (CTM); CTM Access Profile (CAP)".
[6] ETR 341: "Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
communications (GSM); DECT/GSM Interworking Profile; Profile overview".
[7] TR 101 072: "Digital Enhanced Cordless Telecommunications/Global System for Mobile
Communications (DECT/GSM); Integration based on dual-mode terminals".
[8] EN 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 1: Overview".
[9] EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 2: Physical layer (PHL)".
[10] EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 3: Medium Access Control (MAC) layer".
[11] EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 4: Data Link Control (DLC) layer".
ETSI
6 EN 301 242 V1.1.3 (1998-06)
[12] EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 5: Network (NWK) layer".
[13] EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 6: Identities and addressing".
[14] EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 7: Security features".
[15] EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI);
Part 8: Speech coding and transmission".
[16] TBR 6: "Radio Equipment and Systems (RES); Digital Enhanced Cordless Telecommunications
(DECT); General terminal attachment requirements".
[17] TBR 10: "Radio Equipment and Systems (RES); Digital Enhanced Cordless Telecommunications
(DECT); General terminal attachment requirements: Telephony applications".
[18] TBR 19: "European digital cellular telecommunications system (Phase 2); Attachment
requirements for Global System for Mobile communications (GSM) mobile stations; Access".
[19] TBR 20: "European digital cellular telecommunications system (Phase 2); Attachment
requirements for Global System for Mobile communications (GSM) mobile stations; Telephony".
[20] TBR 22: "Radio Equipment and Systems (RES); Attachment requirements for terminal equipment
for Digital Enhanced Cordless Telecommunications (DECT) DECT Generic Access Profile (GAP)
applications".
[21] TBR 31: "Digital cellular telecommunications system (Phase 2); Attachment requirements for
mobile stations in the DCS 1 800 band and additional GSM 900 band; Access".
[22] TBR 32: "Digital cellular telecommunications system (Phase 2); Attachment requirements for
mobile stations in the DCS 1 800 band and additional GSM 900 band; Access".
[23] TBR 40: "Digital Enhanced Cordless Telecommunications (DECT); Integrated Services Digital
Network (ISDN); Attachment requirements for terminal equipment for DECT/ISDN interworking
profile applications".
[24] ITU-T Recommendation G.111: "Loudness ratings (LRs) in an international connection".
[25] EN 301 439: "Digital Enhanced Cordless Telecommunications (DECT); Global System for Mobile
communications (GSM); Attachment requirements for DECT/GSM dual-mode terminal
equipment". [Harmonized EN]
ETSI
7 EN 301 242 V1.1.3 (1998-06)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following definitions apply:
active communication: A state, where a communication link has been established between the DMT and a fixed part in
either GSM or DECT mode.
active mode: GSM or DECT mode after being selected and switch on procedures for that mode being performed.
background scanning: The process whereby a basic DMT attempts to identify the existence of stable networks in the
mode other than the one it is in to which the terminal has access rights.
basic dual mode terminal: A DMT that can only be in one mode at the time and that can be switched either manually
or automatically between modes. The basic DMT is always in one mode.
dual mode terminal: A terminal comprising both GSM and DECT parts.
GSM coverage: The sum of all GSM Public Land Mobile Network (PLMN) coverages where the DMT has at least
limited service.
GSM: In the present document, the GSM part of a DMT can be GSM 900, Digital Cellular System 1800 (DCS 1800) or
GSM/DCS dual band.
mode selection: A DMT based procedure, whereby operating mode, GSM or DECT, is chosen.
mode: A basic DMT is in either of the two modes GSM and DECT. In GSM mode the DMT behaves as a GSM Mobile
Station (MS) and in DECT mode the DMT behaves as a DECT Portable Part (PP).
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ARI Access Rights Identity
CAP CTM Access Profile
CTM Cordless Terminal Mobility
DCS Digital Cellular System
DECT Digital Enhanced Cordless Telecommunications
DMT Dual Mode Terminal
GAP Generic Access Profile
GSM Global System for Mobile communication
IAP ISDN Access Profile
IMSI International Mobile Subscriber Identity
IWP Interworking Profile
MS Mobile Station
PARK Portable Access Rights Key
PIN Personal Identification Number
PLMN Public Land Mobile Network
PP Portable Part
SIM Subscriber Identity Module
LSTR Listener's Sidetone Ratio
RLR Receiving Loudness Rating
SLR Sending Loudness Rating
ETSI
8 EN 301 242 V1.1.3 (1998-06)
4 General on DECT/GSM DMTs
A DMT is a terminal comprising both GSM and DECT parts, see TR 101 072 [7]. The DMT is in either GSM or DECT
mode. When in either mode, the DMT shall operate as the corresponding single mode terminal (except that it may
perform background scanning) and shall fully comply with the relevant standards for that single mode terminal (for
GSM see references in ETS 300 607-1 [4]; for DECT see EN 300 175 parts 1 to 8 [8]-[15] and EN 300 444 [2],
ETS 300 824 [5] or ETS 300 434-2 [1]), unless specified in the present document.
When one mode is entered the DMT shall operate like a single mode terminal that is switched on. When one mode is left
the DMT shall operate like a single mode terminal that is switched off (except for what is specified in subclause 5.2.2.4).
When the DMT switches mode, it shall leave the first before entering the second, and shall operate as two single mode
terminals where the first is switched off before the second is switched on.
In DECT mode it shall be possible to switch to GSM mode to make an emergency call.
Switching between the two modes is done manually by the user or automatically by the terminal. The DMT shall not
switch mode when in active communication. Automatically switching of mode can be based on background scanning or
loss of coverage. In the case the switching of modes is based on background scanning there are requirements to prevent
switching too frequently, see subclause 5.2.2.3 (if the switching is done automatically, the terminal may perform
background scanning and may then change mode as a result of it).
Entry of the Personal Identification Number (PIN) shall be done according to GSM 02.30 (ETS 300 511 [3]) at switch
on of the DMT with a Subscriber Identity Module (SIM) in or at insertion of the SIM when the DMT is switched on. At
the time of entering the PIN the DMT may be in DECT or GSM mode.
NOTE: In GSM mode a SIM card is mandatory except for emergency calls. In DECT mode SIM access is needed,
e.g. for the SIM phone book.
Switching of modes may be done without entering the PIN again. Unblocking PIN or PIN2 need not be supported in
DECT mode.
The DECT part of the DMT shall be based on at least one of the DECT profiles: Generic Access Profile (GAP)
(EN 300 444 [2]); Cordless Terminal Mobility (CTM) Access Profile (CAP) (ETS 300 824 [5]) or ISDN Access Profile
(IAP) (ETS 300 434-2 [1]).
The DECT/GSM IWP (ETR 341 [6]) is not covered by the present document.
5 Provisions for providing continuity of service
5.1 General
A DMT with valid International Mobile Subscriber Identity (IMSI) and/or Access Rights Identity/Portable Access
Rights Key (ARI/PARK) pairs may access service in the areas authorized by the entitlement of the subscriptions.
NOTE 1: DECT ARI class D is not covered in the present document.
If the DMT looses the coverage of the network currently in use, an established communication will be terminated. If the
user then wants to continue, another mode and/or network providing service has to be selected and a new
communication has to be established.
NOTE 2: Seamless handover of an active communication between GSM and DECT modes is thus not supported.
ETSI
9 EN 301 242 V1.1.3 (1998-06)
5.2 Mode selection
5.2.1 General requirements
The DMT shall support at least the following two mechanisms of mode selection:
- manual mode selection;
- automatic mode selection.
NOTE: Network controlled mode selection is not considered in the present document.
The user shall be given the opportunity to change mode selection mechanism at any time when the DMT is not in active
communication.
When the automatic mode selection mechanism is activated, either GSM or DECT shall be considered as the preferred
mode according to the users preference. The user shall be given the opportunity to change the preferred mode at any
time when the DMT is not in active communication.
When using the manual mode selection the user shall be given the opportunity to change the chosen mode at any time
except when in active communication. Background scanning may be implemented in the manual mode selection
mechanism, e.g. to give notification to the user on the availability of other networks.
The DMT shall give an indication to the user of the mode currently in use.
5.2.2 Procedure
...