ETSI TR 103 149 V1.2.1 (2019-07)

System Reference document (SRdoc); DECT operating in the 1 900 MHz - 1 920 MHz band

RTR/ERM-579

General Information

• Status: Published
• Publication Date: 17-Jul-2019
• Technical Committee: ERM - EMC and Radio Spectrum Matters
• Current Stage: 12 - Completion
• Due Date: 17-Jul-2019
• Completion Date: 18-Jul-2019

Standards Content (Sample)

TECHNICAL REPORT
System Reference document (SRdoc);
DECT operating in the 1 900 MHz - 1 920 MHz band

2 ETSI TR 103 149 V1.2.1 (2019-07)

Reference
RTR/ERM-579
Keywords
DECT, SRdoc
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - 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

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2019.
All rights reserved.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners. ®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI
3 ETSI TR 103 149 V1.2.1 (2019-07)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Executive summary . 5
Introduction . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 8
3 Definition of terms, symbols and abbreviations . 10
3.1 Terms . 10
3.2 Symbols . 10
3.3 Abbreviations . 10
4 Comments on the System Reference Document . 11
5 Presentation of the system or technology . 12
6 Market information. 13
7 Technical information . 13
7.1 Detailed technical description . 13
7.2 Technical parameters and implications on spectrum . 13
7.2.1 Status of technical parameters . 13
7.2.1.1 Current ITU and European Common Allocations . 13
7.2.1.2 Sharing and compatibility studies already available . 13
7.2.1.3 Sharing and compatibility issues still to be considered . 14
7.2.2 Transmitter parameters . 14
7.2.2.1 Transmitter Output Power/Radiated Power . 14
7.2.2.1a Antenna Characteristics . 15
7.2.2.2 Operating Frequency . 15
7.2.2.3 Bandwidth . 15
7.2.2.4 Unwanted emissions. 15
7.2.3 Receiver parameters . 16
7.2.3.1 Radio receiver sensitivity . 16
7.2.3.2 Receiver intermodulation performance . 16
7.2.3.3 Radio receiver interference performance . 16
7.2.3.4 Radio receiver blocking . 16
7.2.4 Channel access parameters . 17
7.2.4.1 Frame length . 17
7.2.4.2 Channel selection . 17
7.3 Information on relevant standard(s) . 17
8 Radio spectrum request and justification . 18
8.1 Why additional spectrum is needed . 18
8.2 What are the specific advantages of the band 1 900 MHZ - 1 920 MHz . 18
8.3 The request . 19
9 Regulations . 19
9.1 Current regulations . 19
9.2 Proposed regulation and justification . 19
Annex A: Simulation results for wireless office systems . 20
A.1 Simulation scenario . 20
A.2 Simulation results . 21
ETSI
4 ETSI TR 103 149 V1.2.1 (2019-07)
A.2.1 Introduction . 21
A.2.2 Capacity in large office landscapes with soft partitioning . 21
A.2.3 Interference to and from offices . 22
A.3 The impact of up-link power control . 23
A.3.1 Introduction . 23
A.3.2 Power saving . 23
A.3.3 Control of maximum interference and cell sizes . 24
A.3.4 Capacity impact . 24
A.3.4.1 Single-radio RFPs and WRSs . 24
A.3.4.1.1 Residential single cell systems . 24
A.3.4.1.2 Multi-cell systems . 24
A.3.4.2 Multi-radio RFPs and WRSs . 24
A.4 Summary and conclusions . 24
Annex B: Bibliography . 25
History . 26

ETSI
5 ETSI TR 103 149 V1.2.1 (2019-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://ipr.etsi.org/).
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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Report (TR) has been produced by ETSI Technical Committee Electromagnetic compatibility and Radio
spectrum Matters (ERM).
Modal verbs terminology
In the present document "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be
interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Executive summary
The Digital Enhanced Cordless Telecommunications (DECT) system has started its operation in Europe in the band
1 880 MHz - 1 900 MHz. It has spread around the globe and has become the most successful digital cordless telephone
system in the world.
DECT is well-known for digital cordless telephony and voice focused solutions (e.g. cordless phones, cordless
headsets), in both domestic home market where low-cost single cell devices are used and in the business market, which
requires multi-cell systems with more complex functionality. Wide band and super wide band speech codecs have been
introduced in DECT and ETSI TC DECT is working on integrating the newest technology advancements available.
Clearly, DECT successfully managed to address new markets by improvement and evolution of features and
technology.
With the 'Ultra Low Energy' (ULE) Technical Specification DECT ( [i.27] and [i.28]) is supporting applications in
machine-to-machine communication, Internet of Things (IoT), and Smart Home Automation. Further, the ability of
DECT to enable highly effective application specific protocols it attracted audio conferencing and wireless microphones
(PMSE).
DECT enables highly-effective application-specific communication protocols as well as IP-based communication
including support of the IPv6 standard. DECT is thereby already now well-positioned to serve as technology for several
vertical industries (Industry 4.0, PMSE, e-Health, …).
DECT is part of the IMT-2000 family of standards called IMT-2000 FDMA/TDMA and is so far the only IMT standard
available for license-exempt or de-licensed operation in IMT bands.
ETSI
6 ETSI TR 103 149 V1.2.1 (2019-07)
ETSI TC DECT is currently following two parallel development paths: DECT evolution and DECT-2020 [i.29]:
• DECT evolution is an update of the DECT standard to improve support of applications regarding latency, data-
rate, and reliability based on the latest existing chipsets.
• DECT-2020 updates the air interface to OFDM FDMA/TDMA and will especially on support for URLLC and
mMTC (including mesh networking) use cases in end-user deployed and operated networks. ETSI DECT-2020
is a candidate for being part of the IMT-2020 family of standards.
DECT has interworking profiles available for interworking with GSM and UMTS networks. ETSI TC DECT will
define additional interworking profiles for LTE and 3GPP 5G-NR to provide complementary solution that can operate
on license-exempt or licensed shared, local license or licensed IMT bands, with and without cellular operator
involvement.
More than one billion DECT devices and several billion chips have been sold worldwide which continues to grow by
over by more than 100 million per annum (Source: MZA).
Why more spectrum is needed?
DECT and the upcoming DECT evolution and DECT-2020 are very efficient, reliable and cost-effective system, as
such being very attractive as it provides the right framework to manufacturers to deliver outstanding wireless solutions
for a diverse set of applications demanded by the customers.
The reasons that more spectrum for DECT technology is required are basically two-fold.
New services to cater the increasing demand of digitalization of everything requires additional spectrum which is easy
to access and available for everyone. This includes the demand of applications targeting Machine Type
Communications (MTC) for IoT, Industry 4.0, Home automation enabling e.g. digital twin applications and PMSE use
cases as well as the evolution from telephony service to wideband voice and multimedia data transmission.
Secondly, the evolution of the DECT technology from a standard primarily designed for cordless telephony towards a
full flavoured local area telecommunications standard addressing wireless applications of various markets (e.g.
telephony, IoT, home automation, Industry 4.0, Programme Making and Special Events (PMSE), e-Health, …). DECT
technology is very successful in multiple markets and this continued success might soon lead to local area congestion
issues in the DECT core band (1 880 MHz - 1 900 MHz). as the number of DECT terminals will increase massively.
The current limitation of the DECT band will become an increasing inhibitor to the further growth of the technology.
The new products and applications will only be successful if adequate spectrum is available.
Advantages of the band 1 900 MHz - 1 920 MHz
Most technical documents are already available. The carrier numbers and positions for the use of DECT in the
1 900 MHz - 1 920 MHz band are already defined (see ETSI EN 300 175-2 [i.2], annex F) as a consequence of the IMT
allocation. The harmonized standard for DECT over this band is already available as part of the IMT-2000 set. It is the
ETSI EN 301 908-10 [i.22] (latest release, V4.2.2). An additional harmonized standard for DECT is ETSI
EN 301 406 [i.30].
Therefore, an immediate implementation is possible. It should be noted that the frequencies 1 900 MHz - 1 930 MHz
are already in use by DECT in non-EU countries and that there are already products (> 100 million of devices) in
operation over these frequencies. Nearly all DECT chipset and RF parts vendors are already providing components
compatible with the proposed new allocation. There is no other band where the DECT extension is as simple and
immediate.
DECT technology gains its strength from license-exempt, but protected operation in 1 880 MHz - 1 900 MHz, which is
the DECT core band designated by ERC/DEC(94)03 [i.31] for DECT operation.
The frequency band 1 900 MHz - 1 920 MHz is allocated to the mobile service on a primary basis in the European
Common Allocation Table ERC Report 25 [i.32] and in the ITU Radio Regulations. The band is well suited and
foreseen for TDD operation.
ETSI TC DECT is preparing IMT-2020 technology submission, which is based on TDD-mode well suited for
1 900 MHz - 1 920 MHz operation.
ETSI
7 ETSI TR 103 149 V1.2.1 (2019-07)
DECT is part of the IMT-2000 family of standards called IMT-2000 FDMA/TDMA and making use of TDD. Further,
DECT technology enables already today within its standard other applications of land mobile services, like PMSE
(SAP/SAB).
The band 1 900 MHz - 1 920 MHz would deliver supplementary radio spectrum resources to DECT operation and
would provide effective means to overcome the likely future congestion of the DECT core band.
It is obvious that DECT operation on supplementary resources in 1 900 MHz - 1 920 MHz can follow different
approaches regarding licensing regimes and access conditions.
Introduction
The present document includes necessary information to support the cooperation under the MoU between ETSI and the
Electronic Communications Committee (ECC) of the European Conference of Post and Telecommunications
Administrations (CEPT).
The present document was developed by ETSI TC DECT and approved by ERM by remote consensus on 17-06-2019.
It contains final information.

ETSI
8 ETSI TR 103 149 V1.2.1 (2019-07)
1 Scope
The present document describes DECT operating in the frequency band 1 900 MHz - 1 920 MHz.
It includes in particular:
• Market information.
• Technical information.
• Regulatory issues.
2 References
2.1 Normative references
Normative references are not applicable in the present document.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 300 175-1: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 1: Overview".
[i.2] ETSI EN 300 175-2: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 2: Physical Layer (PHL)".
[i.3] ETSI EN 300 175-3: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 3: Medium Access Control (MAC) layer".
[i.4] ETSI EN 300 175-4: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 4: Data Link Control (DLC) layer".
[i.5] ETSI EN 300 175-5: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 5: Network (NWK) layer".
[i.6] ETSI EN 300 175-6: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 6: Identities and addressing".
[i.7] ETSI EN 300 175-7: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 7: Security features".
[i.8] ETSI EN 300 175-8: "Digital Enhanced Cordless Telecommunications (DECT); Common
Interface (CI); Part 8: Speech and audio coding and transmission".
[i.9] ETSI EN 300 176 (all parts): "Digital Enhanced Cordless Telecommunications (DECT); Test
specification".
[i.10] Recommendation ITU-R M.1457: "Detailed specifications of the radio interfaces of International
Mobile Telecommunications-2000 (IMT-2000)".
ETSI
9 ETSI TR 103 149 V1.2.1 (2019-07)
[i.11] ERC Report 31 (June 1994): "Compatibility between DECT and DCS1800".
[i.12] ERC Report 100 (February 2000): "Compatibility between certain radio communications systems
operating in adjacent bands, evaluation of DECT / GSM 1800 compatibility".
[i.13] ECC Report 96 (March 2007): "Compatibility between UMTS 900/1800 and systems operating in
adjacent bands".
[i.14] ECC Report 146 (June 2010): "Compatibility between GSM MCBTS and other services (TRR,
RSBN/PRMG, HC-SDMA, GSM-R, DME, MIDS, DECT) operating in the 900 and 1 800 MHz
frequency bands".
[i.15] CEPT Report 41 (November 2010): "Compatibility between LTE and WiMAX operating within
the bands 880-915 MHz / 925-960 MHz and 1 710-1 785 MHz / 1 805-1 880 MHz (900/1 800
MHz bands) and systems operating in adjacent bands".
[i.16] ERC Report 65 (November 1999): "Adjacent band compatibility between UMTS and other
services in the 2 GHz Band".
[i.17] CEPT Report 39 (June 2010): "Report from CEPT to the European Commission in response to the
Mandate to develop least restrictive technical conditions for 2 GHz bands".
[i.18] ETSI TR 103 089: "Digital Enhanced Cordless Telecommunications (DECT); DECT properties
and radio parameters relevant for studies on compatibility with cellular technologies operating on
frequency blocks adjacent to the DECT frequency band".
[i.19] Recommendation ITU-R M.1036-5: "Frequency arrangements for implementation of the terrestrial
component of International Mobile Telecommunications-2000 (IMT 2000) in the bands 806 960
MHz, 1 710-2 025 MHz, 2 110 2 200 MHz and 2 500-2 690 MHz".
[i.20] ITU Radio Regulations.
[i.21] Void.
[i.22] ETSI EN 301 908-10: "Electromagnetic compatibility and Radio spectrum Matters (ERM); Base
Stations (BS), Repeaters and User Equipment (UE) for IMT-2000 Third-Generation cellular
networks; Part 10: Harmonised Standard for IMT-2000, FDMA/TDMA (DECT) covering the
essential requirements of article 3.2 of the Directive 2014/53/EU".
[i.23] ETSI TR 101 310: "Digital Enhanced Cordless Telecommunications (DECT); Traffic capacity and
spectrum requirements for multi-system and multi-service DECT applications co-existing in a
common frequency band".
[i.24] ETSI EN 300 444: "Digital Enhanced Cordless Telecommunications (DECT); Generic Access
Profile (GAP)".
[i.25] ETSI EN 301 649: "Digital Enhanced Cordless Telecommunications (DECT); DECT Packet
Radio Service (DPRS)".
[i.26] ETSI TS 102 527-1: "Digital Enhanced Cordless Telecommunications (DECT); New Generation
DECT; Part 1: Wideband speech".
[i.27] ETSI TS 102 939-1: "Digital Enhanced Cordless Telecommunications (DECT); Ultra Low Energy
(ULE); Machine to Machine Communications; Part 1: Home Automation Network (phase 1)".
[i.28] ETSI TS 102 939-2: "Digital Enhanced Cordless Telecommunications (DECT); Ultra Low Energy
(ULE); Machine to Machine Communications; Part 2: Home Automation Network (phase 2)".
[i.29] ETSI TR 103 514: "Digital Enhanced Cordless Telecommunications (DECT); DECT-2020 New
Radio (NR) interface; Study on Physical (PHY) layer".
[i.30] ETSI EN 301 406: "Digital Enhanced Cordless Telecommunications (DECT); Harmonised
Standard covering the essential requirements of article 3.2 of the Directive 2014/53/EU".
ETSI
10 ETSI TR 103 149 V1.2.1 (2019-07)
[i.31] ERC/DEC(94)03: "ERC Decision of 24th October 1994 on the frequency band to be designated
for the coordinated introduction of the Digital European Cordless Telecommunications system
(ERC/DEC/(94)03)".
[i.32] ERC Report 25 (March 2019): "The European Table of Frequency; Allocations and Applications
in the Frequency Range 8.3 kHz to 3000 GHz (ECA Table)".
[i.33] ECC Report 294 (February 2019): "Assessment of the spectrum needs for future railway mobile
radio (RMR) communications".
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
F Carrier Frequency
C
F Lower Frequency
L
F Upper Frequency
U
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
3GPP Third Generation Partnership Project
AM Amplitude Modulation
BER Bit Error Rate
CEPT Commission Européenne des Postes et Télécommunications
DECT Digital Enhanced Cordless Telecommunications
DPRS DECT Packet Radio Service
DSL Digital Subscriber Line
ECC Electronic Communications Committee
EIRP Effective Isotropic Radiated Power
ERC European Radiocommunications Committee
FDMA Frequency Division Multiple Access
FRMCS Future Railway Mobile Communication System
GAP Generic Access Profile
GoS Grade of Service
GSM Global System for Mobile Communications
GSM-R Global System for Mobile Communications – Rail(way)
ICT Information Communication Technology
iDCS instant Dynamic Channel Selection
IMT International Mobile Telecommunications
IoT Internet of Things
IP Internet Protocol
IPR Intellectual Property Rights
ITU International Telecommunications Union
ITU-R International Telecommunication Union - Radiocommunication sector
M2M Machine to Machine
MAC Medium Access Control
mMTC massive MTC
MTC Machine Type Communication
NR New Radio
NTP Normal Transmitted Power
ETSI
11 ETSI TR 103 149 V1.2.1 (2019-07)
OFDM Orthogonal Frequency-Division Multiplexin
PMSE Programme Making and Special Event
PP Portable Part
RF Radio Frequency
RFP Radio Fixed Part
RLL Radio Local Loop
SRdoc System Reference document
TDD Time Division Duplex
TDMA Time Division Multiple Access
UL/DL UpLink/DownLink
ULE Ultra Low Energy
UMTS Universal Mobile Telecommunication System
URLLC Ultra-Reliable Low Latency Communications
WLAN Wireless Local Area Networks
WRS Wireless Relay Station
4 Comments on the System Reference Document
The following comments have been raised by ETSI members:
• Comments from the Ministère de l'Economie et des Finances (France):
- The 1 900 MHz - 1 920 MHz band is considered by CEPT as a candidate frequency band for the future
railway mobile communications system (successor of GSM-R) and for professional UAS. Therefore,
studies of DECT in this band may be only considered once the primary user(s) will be chosen by CEPT.
• Comments from UIC (UGFA):
- Clause 8.2, second paragraph:
UIC understands that currently the 1 900 MHz - 1 920 MHz is used for DECT applications as follows:
 1 880 MHz - 1 900 MHz - Europe and Australasia
 1 900 MHz - 1 920 MHz - China, but in negotiation and expected to prefer other technology
 1 893 MHz - 1 906 MHz - Japan
 1 910 MHz - 1 930 MHz - Latin America
 1 910 MHz - 1 920 MHz - Brazil
 1 920 MHz - 1 930 MHz - US and Canada
This implies that the 1 900 MHz - 1 910 MHz to date is only used in Japan for DECT.
The full 1 900 MHz - 1 920 MHz band is currently under examination for rail usage (possibly as primary user)
under the EC mandate on FRMCS as a complementary band (to allow for at least 10 MHz TDD for rail
probably in the lower 10 MHz). The ECC report 294 [i.33] has confirmed the necessity of a complementary
band for railways.
Therefore, UIC oppose to the current request for DECT to use the 1 900 MHz - 1 920 MHz.
Clause 8.2, last paragraph:
UIC considers that under appropriate conditions it could be possible to operate e.g. the 1 900 MHz - 1 910
MHz by railways and DECT to use the 1 900 MHz band. Both indoor and outdoor DECT use cases need to be
considered. For this, use cases such as DECT usage in railway stations need to be analysed to guarantee
appropriate coexistence with railway usage of this frequency band, especially in view of the case where DECT
uses 1 W EIRP.
Clause 8.3 third paragraph:
ETSI
12 ETSI TR 103 149 V1.2.1 (2019-07)
See comment at clause 8.2.
Furthermore a definition of indoor environments is needed as the building/penetration losses vary widely
within Europe
Clause 9.1:
UIC would like to request detailed analyses of this statement. In our understanding of the current
ERC Report 25 [i.32] allocation: Although RR footnote 5.388 identifies the band 1 885 MHz - 2 025 MHz as
being intended to become an IMT band, the footnote 5.388A clarifies that for region 1 this is only applicable to
high altitude platform stations.
Clause 9.2: same comments as to clause 8.
Clause 9.2 third paragraph:
UIC questions if this is correct as different use of the same standard on adjacent band is likely to need a guard
band in between.
5 Presentation of the system or technology
DECT is a general radio access technology for wireless telecommunications, for cell radii ranging from a few meters to
several kilometres, depending on application and environment. The DECT technology provides a comprehensive set of
protocols which provide the flexibility to interwork between numerous different applications and networks. The
standard specifies a high capacity TDMA/TDD radio interface supporting symmetric and asymmetric connections,
connection oriented and connectionless data transport and provides security and confidentiality services. The mandatory
instant Dynamic Channel Selection (iDCS) messages and procedures provide effective co-existence of uncoordinated
private and public systems on the common designated DECT frequency band and avoid any need for traditional
frequency planning.
The first version of the multipart DECT base standard ETSI EN 300 175 was published in 1992. In the same year the
first DECT speech and data products appeared on the market. Three years later the ETSI EN 300 444 [i.24], the
'Generic Access Profile' (GAP), was completed, which is an interoperability profile for DECT speech products.
In the year 2000 the ITU approved DECT as an air-interface of IMT-2000 and the technology was included in the
corresponding Recommendation ITU-R M.1457 [i.10]. In the same year the DECT Packet Radio Service (DPRS)
specification ETSI EN 301 649 [i.25] was published. In 2003 high level modulation modes with a rate of up to
~7 Mbit/s and turbo coding were introduced in the base standard.
With the introduction of 'DECT New Generation' internet connectivity is provided to the user. Together with voice over
IP high quality wide band and super wide band speech codecs have been introduced in DECT. ETSI
TS 102 527-1 [i.26] was first published in 2007. In later parts several supplementary services as well as headset
management and software update over the air have been standardized. For applications with increased security
requirements additional authentication and encryption algorithms have been defined.
Already in 2012, TC DECT started to work on a new application of DECT for completely different markets. DECT
Ultra Low Energy (ULE) ( [i.27] and [i.28]) targets IoT applications. The low power consumption of ULE technology
extends battery life (typically up to ten years) and, with New Generation DECT, connectivity to the Internet is already
available, which makes the technology ideal for sensors, alarms, machine-to-machine applications and industrial
automation. Further, the ability of DECT to enable highly effective application specific protocols it attracted audio
conferencing and wireless microphones (PMSE).
DECT enables highly-effective application-specific communication protocols as well as IP-based communication
including support of the IPv6 standard. DECT is thereby already now well-positioned to serve as technology for several
vertical industries (Industry 4.0, PMSE, e-Health, …).
ETSI TC DECT is currently following two parallel development paths: DECT evolution and DECT-2020 [i.29]:
• DECT evolution is an update of the DECT standard to improve support of applications regarding latency, data-
rate, and reliability based on the latest existing chipsets.
• DECT-2020 updates the air interface to OFDM FDMA/TDMA and will especially on support for URLLC and
mMTC (including mesh networking) use cases in end-user deployed and operated networks. ETSI DECT-2020
is a candidate for being part of the IMT-2020 family of standards.
ETSI
13 ETSI TR 103 149 V1.2.1 (2019-07)
DECT has interworking profiles available for interworking with GSM and UMTS networks. ETSI TC DECT will
define additional interworking profiles for LTE and 3GPP 5G-NR to provide complementary solution that can operate
on license-exempt or licensed shared, local license or licensed IMT bands, with and without cellular operator
involvement.
6 Market information
The Digital Enhanced Cordless Telecommunications (DECT) system has started its operation in Europe in the band
1 880 MHz - 1 900 MHz. It has spread around the globe and has become the most successful digital cordless telephone
system in the world. The system has been adopted in over 110 countries.
According to recent market research studies on DECT cordless telephony, today's installed base is more than 1 000
million devices. A market volume of more than 90 million devices per year for personal use and about 45 million
devices per year for enterprise use was reached in 2018. Market research institutes report a yearly growing rate of 3 %
to 5 % per year in the cordless telephony market. DECT telephony products now account for more than 80 % of the
world market in cordless telephony.
By improvement and evolution of features and technology, DECT successfully managed to address new markets.
With the 'Ultra Low Energy' (ULE) Technical Specification DECT ( [i.27] and [i.28]) is supporting applications in
machine-to-machine communication, Internet of Things (IoT), and Smart Home Automation. The M2M/IoT market is a
global multi-billion-dollar market, where DECT ULE is well positioned and successful further backed due to its
availability in many WLAN/DSL access points deployed by the customer base of major telecommunication companies.
Further, the ability of DECT to enable highly effective application specific protocols has attracted audio conferencing
and wireless microphones (PMSE). One can note that all major manufactures of audio industry have DECT based
products like office headsets, wireless microphones for semi-professional applications and conferencing solutions.
DECT enables highly-effective application-specific communication protocols as well as IP-based communication
including support of the IPv6 standard. DECT is thereby already now well-positioned to serve as technology for several
vertical industries (Industry 4.0, PMSE, e-Health, …).
DECT evolution and DECT-2020 will continue this success story of DECT and will for sure continue to provide an
attractive communication solution within the whole eco-system of ICT.
7 Technical information
7.1 Detailed technical description
A detailed technical description can be found in the DECT base standard ETSI EN 300 175 parts 1 [i.1] to 8 [i.8] and in
the test specifications ETSI EN 300 176 parts 1 and 2 [i.9].
7.2 Technical parameters and implications on spectrum
7.2.1 Status of technical parameters
7.2.1.1 Current ITU and European Common Allocations
Relevant documents are the ITU Radio Regulations [i.20] and the Recommendation ITU-R M.1036-5 [i.19].
7.2.1.2 Sharing and compatibility studies already available
The following documents, which include compatibility studies concerning DECT, have been identified and may be used
by CEPT for their sharing and compatibility studies.
• ERC Report 31 [i.11].
ETSI
14 ETSI TR 103 149 V1.2.1 (2019-07)
• ERC Report 100 [i.12].
• ECC Report 96 [i.13].
• ECC Report 146 [i.14].
• CEPT Report 41 [i.15].
• ERC Report 65 [i.16].
• CEPT Report 39 [i.17].
• ETSI TR 103 089 [i.18].
7.2.1.3 Sharing and compatibility issues still to be considered
The use of 1 900 MHz - 1 920 MHz is currently also considered for other applications, e.g. drones and railways.
However, considering open access to 1 900 MHz - 1 920 MHz spectrum for multiple IoT services and other services
would strengthen European economy in terms of digitalization capabilities. In this area the 2,4 GHz spectrum has
proven its importance as for innovative new digital services.
7.2.2 Transmitter parameters
7.2.2.1 Transmitter Output Power/Radiated Power
The NTP is the transmitted power averaged from the start of symbol p0 of the physical packet, to the end of the physical
packet. The NTP should be less than 250 mW (24 dBm) per simultaneously active transceiver at extreme conditions.
Typically the fixed part is transmitting at a constant power level, but this power may be less than the maximum allowed
value. For the portable part a power control algorithm has been defined and normally the portable part will adjust the
transmit power to the required level.
Table 1: Emissions due to modulation
Emissions on RF channel "Y" Maximum power level
Y = M ± 1
160 μW
Y = M ± 2
1 μW
Y = M ± 3 80 nW
Y = any other DECT channel 40 nW
NOTE: For Y = "any other DECT channel", the maximum power level should be less than
40 nW except for one instance of a 500 nW signal.

The power in RF channel Y is defined by integration over a bandwidth of 1 MHz centred on the nominal centre
frequency, Fy, averaged over at least 60 % but less than 80 % of the physical packet, and starting before 25 % of the
physical packet has been transmitted but after the synchronization word.
The power level of all modulation products (including Amplitude Modulation (AM) products due to the switching on or
off of a modulated RF carrier) arising from a transmission on RF channel M should, when measured using a peak hold
technique, be less than the values given in table 2. The measurement bandwidth should be 100 kHz and the power
should be integrated over a 1 MHz bandwidth centred on the DECT frequency, Fy.
Table 2: Emissions due to transmitter transients
Emissions on RF channel "Y" Maximum power level
Y = M ± 1
250 μW
Y = M ± 2 40 μW
Y = M ± 3
4 μW
Y = any other DECT channel 1 μW

ETSI
15 ETSI TR 103 149 V1.2.1 (2019-07)
7.2.2.1a Antenna Characteristics
The antenna gain should be equal or less than 6 + X dBi. X is the difference in dB between 24 dBm and the NTP
expressed in dBm for any one active transmitter. Smart antennas may be used.
NOTE: This corresponds to 1 W effective isotropic radiated power. In addition the maximum value for the
normal transmitted power is 250 mW.
7.2.2.2 Operating Frequency
The carrier frequencies are defined by:
• Fc = F9 + c × 1,728 MHz
Where:
• F9 = 1 881,792 MHz; and
• c = 11, 12, 13, ., 21.
Table 3: Carrier frequencies
Carrier number Rf-band number Carrier frequency
c (MHz)
11 00001 1 900,800
12 00001 1 902,528
13 00001 1 904,256
14 00001 1 905,984
15 00001 1 907,712
16 00001 1 909,440
17 00001 1 911,168
18 00001 1 912,896
19 00001 1 914,624
20 00001 1 916,352
21 00001 1 918,080
7.2.2.3 Bandwidth
The typical bandwidth is 1 MHz.
7.2.2.4 Unwanted emissions
The peak power level of any RF emissions outside the radio frequency band allocated to DECT, as defined in
clause 7.2.2.1, when a radio end point has an allocated physical channel, should not exceed 250 nW at frequencies
below 1 GHz and 1 μW at frequencies above 1 GHz. The power should be defined in the bandwidths given in table 4. If
a radio end point has more than one transceiver, any out of band transmitter intermodulation products should also be
within these limits.
Table 4: Measurement bandwidth for the spurious emissions
Frequency offset, f Measurement
o
bandwidth
From edge of band
30 kHz
0 MHz ≤ fo < 2 MHz
30 kHz
2 MHz ≤ fo < 5 MHz
5 MHz ≤ fo < 10 MHz 100 kHz
300 kHz
10 MHz ≤ fo < 20 MHz
20 MHz ≤ fo < 30 MHz 1 MHz
3 MHz
30 MHz ≤ fo < 12,75 GHz
Measurements should not be made for transmissions on the RF channel closest to the nearest band edge for frequency
offsets of up to 2 MHz.
ETSI
16 ETSI TR 103 149 V1.2.1 (2019-07)
In addition, not regarding up to 2 instances of a continuous-wave spurious signal for PPs for which the total peak power
level should be less than 250 nW as measured in a 3 MHz measurement bandwidth, the peak power level should be less
than 20 nW in a 100 kHz measuring bandwidth for the following broadcast bands:
• 47 MHz - 74 MHz;
• 87,5 MHz - 108 MHz;
• 108 MHz - 118 MHz;
• 174 MHz - 230 MHz;
• 470 MHz - 862 MHz.
7.2.3 Receiver parameters
7.2.3.1 Radio receiver sensitivity
The radio receiver sensitivity should be -83 dBm (i.e. 60 dBμV/m), or better.
7.2.3.2 Receiver intermodulation performance
With a call set up on a particular physical channel, two interferers are introduced so that they can
...