ETSI EN 302 404 V7.1.1 (2000-08)

SLOVENSKI STANDARD
SIST EN 302 404 V7.1.1:2003
01-december-2003
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Digital cellular telecommunications system (Phase 2+) (GSM); GSM Cordless Telephony
System (CTS), Phase 1; Lower Layers of the CTS Radio Interface; Stage 2; (GSM 03.52
version 7.1.1 Release 1998)
Ta slovenski standard je istoveten z: EN 302 404 Version 7.1.1
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST EN 302 404 V7.1.1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 302 404 V7.1.1:2003

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SIST EN 302 404 V7.1.1:2003
ETSI EN 302 404 V7.1.1 (2000-08)
European Standard (Telecommunications series)
Digital cellular telecommunications system (Phase 2+);
GSM Cordless Telephony System (CTS), Phase 1;
Lower Layers of the CTS Radio Interface;
Stage 2
(GSM 03.52 version 7.1.1 Release 1998)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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SIST EN 302 404 V7.1.1:2003
2 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
Reference
DEN/SMG-030352Q7
Keywords
Digital cellular telecommunications system,
Global System for Mobile communications
(GSM),GSM Cordless Telephony System (CTS)
ETSI
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© European Telecommunications Standards Institute 2000.
All rights reserved.
ETSI

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SIST EN 302 404 V7.1.1:2003
3 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
Contents
Intellectual Property Rights.6
Foreword.6
1 Scope .7
2 References .7
3 Definitions and abbreviations.8
3.1 Definitions.8
3.2 Abbreviations .8
4 Main concepts of the CTS radio interface.8
4.1 Beacon concept .8
4.2 Adaptive Frequency Allocation (AFA) concept.9
4.3 Total Frequency Hopping (TFH) concept .9
5 Radio Transmission and Reception.9
5.1 Frequency Band and Channel Arrangement.9
5.2 Receiver Characteristics .9
5.2.1 CTS-MS characteristics .9
5.2.2 CTS-FP characteristics .9
5.3 Transmitter Characteristics.9
5.3.1 CTS-MS characteristics .9
5.3.2 CTS-FP characteristics .10
5.4 CTS transmitter / receiver performance .10
6 Modulation and Raw Data Rates.10
7 Channel Coding and Interleaving.10
8 Time Slots and TDMA-Frames.10
9 Bursts.11
10 Logical Channels.11
10.1 CTS Beacon Channel (CTSBCH) .11
10.1.1 CTSBCH format .11
10.1.2 CTSBCH timing .11
10.1.3 CTSBCH radio frequency channel .12
10.1.4 CTSBCH-SB information.12
10.2 CTS Access Request Channel (CTSARCH) .12
10.2.1 CTSARCH format .12
10.2.2 CTSARCH timing .12
10.2.3 CTSARCH radio frequency channel.12
10.2.4 CTSARCH information .13
10.3 CTS Access Grant Channel (CTSAGCH).13
10.3.1 CTSAGCH format .13
10.3.2 CTSAGCH timing .13
10.3.3 CTSAGCH radio frequency channel .13
10.3.4 CTSAGCH information.13
10.4 CTS Paging Channel (CTSPCH).14
10.4.1 CTSPCH format.14
10.4.2 CTSPCH timing.14
10.4.3 CTSPCH radio frequency channel.14
10.4.4 CTSPCH information .14
10.5 SACCH .14
10.6 FACCH .15
10.7 TCH.15
10.8 Mapping of the Logical Channels onto Physical Channels .15
10.8.1 Mapping in time of the logical channels onto the physical channels.15
ETSI

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SIST EN 302 404 V7.1.1:2003
4 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
10.8.2 Mapping in frequency of the logical channels onto the physical channels .16
10.8.3 Permitted Channel Combinations .16
11 Lower Layer Procedures .17
11.1 CTSBCH transmission .17
11.2 CTSBCH timeslot management .17
11.3 CTSBCH-FB detection.17
11.4 CTSBCH-SB decoding.17
11.5 Discontinuous transmission (DTX).17
11.6 Interference measurements.17
11.7 MS timing offset measurements.18
12 Radio Resource Management Procedures.18
12.1 Radio Resources management states.18
12.2 General procedures.18
12.2.1 Initial synchronization of a CTS-MS and CTS-FP .18
12.2.2 Frequency management .18
12.2.2.1 Interference measurements exchange.19
12.2.2.2 Adaptive Frequency Allocation (AFA) algorithm .19
12.2.2.3 AFA / TFH interworking .19
12.2.2.4 CTSBCH frequency selection .19
12.2.3 CTSBCH-SB information.20
12.2.4 Control of CTS-FP service range.20
12.2.5 CTS-FP selection .20
12.3 RR Idle state procedures.20
12.3.1 CTSBCH monitoring .20
12.3.2 Alive check .20
12.3.3 Establishment of a dedicated RR connection.20
12.3.3.1 Timeslot assignment for dedicated connection .20
12.3.3.2 CTS-MS initiated RR connection establishment.21
12.3.3.2.1 Non-hopping access procedure.21
12.3.3.2.2 Hopping access procedure.21
12.3.3.3 CTS-FP initiated RR connection establishment .21
12.3.4 CTSBCH failure detection.22
12.4 RR Active state procedures .22
12.4.1 Radio link failure detection.22
12.4.2 RF power control .22
12.4.3 Intracell handover .22
12.4.4 Channel release.22
Annex A (informative): GSM backwards compatibility issues .23
A.1 Reasons for possible impact of a CTS-FP on a GSM-MS in the PLMN .23
A.1.1 Power measurement of BCCH carrier.23
A.1.1.1 Power on CTS-FP beacon frequency seen by the GSM-MS in cell selection.23
A.1.1.2 Power on CTS-FP hopping frequencies seen by the GSM-MS in cell selection .24
A.1.2 Synchronisation of a GSM-MS .24
A.2 Scenario 1: PLMN and CTS-GFL have no common frequency in whole coverage area.24
A.2.1 Cell Selection .24
A.2.1.1 GSM-MS has no BA list stored on the SIM .24
A.2.1.2 GSM-MS has a stored BA list on the SIM (optional).24
A.2.2 Cell reselection.25
A.2.3 Handover .25
A.3 Scenario 2: PLMN and CTS-GFL have locally no common frequency.25
A.3.1 Cell Selection .25
A.3.1.1 GSM-MS has no BA list stored on the SIM .25
A.3.1.2 GSM-MS has a stored BA list on the SIM (optional).25
A.3.2 Cell reselection.25
A.3.2.1 GSM-MS camping on its home PLMN .25
A.3.2.2 GSM-MS camping on a visited PLMN in home country.26
A.3.3 Handover .26
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SIST EN 302 404 V7.1.1:2003
5 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
A.4 Scenario 3: PLMN and CTS-GFL have locally some common frequencies.26
A.4.1 Cell selection .26
A.4.2 Cell reselection.26
A.4.3 Handover .27
A.5 Conclusion.27
Annex E (informative): Document change history.28
History .29
ETSI

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SIST EN 302 404 V7.1.1:2003
6 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
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 ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://www.etsi.org/ipr).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (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 Technical Committee Special Mobile
Group (SMG).
The present document was submitted to Public Enquiry with the ETSI number 301 404. For vote the number was
changed to 302 404 because the number 301 404 is reserved and was allocated accidentally.
The present document gives an overall description of the lower layers of the radio interface for GSM based Cordless
Telephony Systems.
The contents of the present document is subject to continuing work within SMG and may change following formal
SMG approval. Should SMG modify the contents of the present document it will be re-released with an identifying
change of release date and an increase in version number as follows:
Version 7.x.y
where:
7 indicates Release 1998 of GSM Phase 2+
x the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
y the third digit is incremented when editorial only changes have been incorporated in the specification.
National transposition dates
Date of adoption of this EN: 21 July 2000
Date of latest announcement of this EN (doa): 31 October 2000
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 30 April 2001
Date of withdrawal of any conflicting National Standard (dow): 30 April 2001
ETSI

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SIST EN 302 404 V7.1.1:2003
7 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
1 Scope
The present document gives an overall description of the lower layers of the radio interface for GSM based Cordless
Telephony Systems (GSM-CTS).
The GSM-CTS system is intended to provide a cordless connection between the fixed network and GSM-based CTS
Mobile Stations (CTS-MS) via a private CTS Fixed Part (CTS-FP).
Stage 1 is an overall description, from the service subscribers and user’s standpoint, that view the network as a single
entity which provides service to the user. GSM 02.56 [2] contains the CTS Stage 1 service description.
GSM 03.56 [5] is a Stage 2 document that describes the system architecture of the GSM Cordless Telephone Systems
(GSM-CTS), i.e. the system elements, the system interfaces and the functional capabilities.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, 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.
• For this Release 1998 document, references to GSM documents are for Release 1998 versions (version 7.x.y).
[1] GSM 01.04: "Digital cellular telecommunications system (Phase 2+); Abbreviations and
Acronyms".
[2] GSM 02.56: "Digital cellular telecommunications system (Phase 2+); GSM Cordless Telephone
System (CTS); Service Description; Stage 1".
[3] GSM 03.22: "Digital cellular telecommunications system (Phase 2+); Functions related to Mobile
Station (MS) in idle mode and group receive mode", Version 6.x.x.
[4] GSM 03.20: "Digital cellular telecommunications system (Phase 2+); GSM Cordless Telephone
System (CTS); Security related network functions; Stage 2".
[5] GSM 03.56: "Digital cellular telecommunications system (Phase 2+); GSM Cordless Telephony
System (CTS); CTS Architecture Description; Stage 2".
[6] GSM 04.08: "European digital cellular telecommunications system (Phase 2+); Mobile radio
interface layer 3 specification", Version 6.x.x.
[7] GSM 05.02: "Digital cellular telecommunications system (Phase 2+); Multiplexing and multiple
access on the radio path", Version 6.3.0.
[8] GSM 05.03: "Digital cellular telecommunications system (Phase 2+); Channel coding",
Version 6.1.0.
[9] GSM 05.04: "Digital cellular telecommunications system (Phase 2+); Modulation".
[10] GSM 05.05: "Digital cellular telecommunications system (Phase 2+); Radio transmission and
reception".
[11] GSM 05.08: "Digital cellular telecommunications system (Phase 2+); Radio subsystem link
control".
ETSI

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SIST EN 302 404 V7.1.1:2003
8 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
[12] GSM 05.10: "Digital cellular telecommunications system (Phase 2+); Radio subsystem
synchronization".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
CTS Mobile Station: a GSM-MS supporting CTS.
CTS Fixed Part: the CTS-FP is a device which acts as a link between the CTS-MS and the fixed network
GSM-CTS: Cordless Telephony System based on GSM
3.2 Abbreviations
The following list describes the abbreviations and acronyms used in the present document. The GSM abbreviations
explained in GSM 01.04 [1] are not included below.
AFA Adaptive Frequency Allocation
CTS Cordless Telephony System
CTSAGCH CTS Access Grant CHannel
CTSARCH CTS Access Request CHannel
CTSBCH CTS Beacon CHannel
CTS-FP CTS Fixed Part
CTS-MS CTS Mobile Station
CTSMSI CTS Mobile Subscriber Identity
CTSPCH CTS Paging CHannel
DPLMN Donor Public Land Mobile Network
FPBI Fixed Part Beacon Identity
GFL Generic Frequency List
RX Receive
TFH Total Frequency Hopping
TX Transmit
4 Main concepts of the CTS radio interface
The main assumption behind the CTS work item and in particular the CTS radio interface, is that a modified single
timeslot state of the art GSM-MS chipset could be used for a home base station, i.e. as a CTS-FP.
The CTS radio interface has been designed to meet a requirement of low generated interference, either from the CTS to
existing overlaying PLMNS, either from a CTS to another CTS. This requirement is achieved by the combined usage of
the three concepts: beacon concept, AFA concept and TFH concept.
4.1 Beacon concept
A limited number of CTS-MS shall be served by one CTS-FP (see GSM 02.56 [2]). Therefore, a broadcast channel
continuously transmitted such as the BCCH in GSM is not needed for CTS.
A channel called CTS beacon channel (CTSBCH) is proposed with the following main characteristics: it is transmitted
by the CTS-FP every 26 frames in a 52-multiframe pattern, and allows the CTS-MS to synchronise with the CTS-FP.
Minimum signalling is also supported by the CTSBCH, so that it is the only logical channel a CTS-FP shall periodically
transmit on the CTS radio interface. Every other logical channel is only transmitted "on demand".
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SIST EN 302 404 V7.1.1:2003
9 ETSI EN 302 404 V7.1.1 (2000-08)
(GSM 03.52 version 7.1.1 Release 1998)
4.2 Adaptive Frequency Allocation (AFA) concept
A precise radio frequency planning can not be applied to the CTS-FP/MS pair, as the CTS is intended to be deployed by
the end-user. Therefore, a list of frequencies (the GFL) on which it is allowed to operate is given to the CTS. With the
AFA, interference measurements will be performed on the frequencies in the GFL to provide a ranking in the AFA
table, in order to exclude unacceptably interfered frequencies from the usage in CTS.
4.3 Total Frequency Hopping (TFH) concept
The remaining frequencies are used by the Total Frequency Hopping algorithm in order to reduce the interference of the
CTS with the overlaying PLMN and other CTS-FP/MS pairs. With TFH the interference caused by the CTS link is
spread across multiple GSM links (interference averaging) and the co-channel interference is due to different users at
different locations (interference diversity).
A new hopping algorithm which is especially tailored for use in CTS with improved performance compared to the GSM
hopping algorithms shall be used.
5 Radio Transmission and Reception
The CTS-FP and CTS-MS shall in Phase 1 GSM-CTS conform to the transmission and reception specifications of at
least one or more of the following cellular standards:
- P-GSM900
- E-GSM900
- DCS1800
- PCS1900
The final choice of characteristics and perf
...