ETSI TS 103 636-1 V1.4.1 (2023-01)

DECT-2020 New Radio (NR); Part 1: Overview; Release 1

RTS/DECT-00375

General Information

• Status: Not Published
• Technical Committee: DECT - Digital Enhanced Cordless Telecommunications (DECT)
• Current Stage: 12 - Completion
• Due Date: 09-Jan-2023
• Completion Date: 16-Jan-2023

Standards Content (Sample)

ETSI TS 103 636-1 V1.4.1 (2023-01)






TECHNICAL SPECIFICATION
DECT-2020 New Radio (NR);
Part 1: Overview;
Release 1

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Release 1 2 ETSI TS 103 636-1 V1.4.1 (2023-01)

Reference
RTS/DECT-00375
Keywords
5G, DECT, DECT-2020, IMT-2020, NR, OFDM,
radio

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ETSI

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Release 1 3 ETSI TS 103 636-1 V1.4.1 (2023-01)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definition of terms, symbols and abbreviations . 6
3.1 Terms . 6
3.2 Symbols . 6
3.3 Abbreviations . 6
4 General . 8
4.1 Introduction . 8
4.2 Overview of the parts of DECT-2020 Technical Specifications . 9
5 System and Network Architectures . 9
5.1 Wireless Point-to-Point and Point-to-Multipoint Links. 9
5.2 Local Area Wireless Access Networks in Cellular Network Topology . 9
5.3 Mesh network topology . 10
5.3.1 Introduction. 10
5.3.2 Mesh system operation . 10
5.3.3 Mesh Routing. 12
5.4 Interworking . 13
6 Overview on Radio technology . 14
6.1 Radio interface protocol architecture . 14
6.2 Physical Layer . 15
6.2.1 Physical Layer functions and capabilities . 15
6.2.2 Radio characteristics . 16
6.3 Medium Access Control Layer . 16
6.3.1 Introduction. 16
6.3.2 MAC Structure . 16
6.3.3 Identities . 18
6.3.4 Services . 18
6.3.5 Functions . 19
6.3.6 Channel Structure . 19
6.4 Mobility and State Transitions . 20
6.4.1 Overview . 20
6.4.2 Intra DECT-2020 Mobility . 20
6.5 Data Link Control . 21
6.5.1 DLC Entities and Architecture. 21
6.5.2 Routing services . 22
6.6 Convergence Layer. 22
6.6.1 General . 22
6.6.2 CVG Service types. 23
6.6.3 Data identification and multiplexing. 24
6.7 Co-existence . 24
6.7.1 General . 24
6.7.2 Technical Features for Supporting Co-existence . 24
History . 26


ETSI

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Release 1 4 ETSI TS 103 636-1 V1.4.1 (2023-01)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are 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
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Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
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Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Digital Enhanced Cordless
Telecommunications (DECT).
The present document is part 1 of a multi-part deliverable covering the DECT-2020 New Radio (NR) technology, as
identified below:
Part 1: "Overview";
Part 2: "Radio reception and transmission requirements";
Part 3: "Physical layer";
Part 4: "MAC layer";
Part 5: "DLC and Convergence layers".
DECT-2020 NR is recognized in Recommendation ITU-R M.2150 [i.2] as a component RIT fulfilling the IMT-2020
requirements of the IMT-2020 use scenarios Ultra-Reliable Low Latency Communication (URLLC) and massive
Machine Type Communication (mMTC). The Set of Radio Interface Technology (SRIT) called "DECT 5G SRIT" is
involving 3GPP NR and DECT-2020 NR.
The present document introduces the system overview covering mMTC and URLLC features.
Modal verbs terminology
In the present document "shall", "shall not", "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.
ETSI

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Release 1 5 ETSI TS 103 636-1 V1.4.1 (2023-01)
1 Scope
The present document provides an overview on DECT-2020 NR including layers, system and network architectures
envisioned for this release. Further it provides an overview to ETSI TS 103 636-2 [1], ETSI TS 103 636-3 [2], ETSI
TS 103 636-4 [3], ETSI TS 103 636-5 [4] and their interrelation.
2 References
2.1 Normative 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.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
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 necessary for the application of the present document.
[1] ETSI TS 103 636-2: "DECT-2020 New Radio (NR); Part 2: Radio reception and transmission
requirements; Release 1".
[2] ETSI TS 103 636-3: "DECT-2020 New Radio (NR); Part 3: Physical layer; Release 1".
[3] ETSI TS 103 636-4: "DECT-2020 New Radio (NR); Part 4: MAC layer; Release 1".
[4] ETSI TS 103 636-5: "DECT-2020 New Radio (NR); Part 5: DLC and Convergence layers;
Release 1".
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 TS 123 501: "5G; System architecture for the 5G System (5GS) (3GPP TS 23.501)".
[i.2] Recommendation ITU-R M.2150: "Detailed specifications of the terrestrial radio interfaces of
International Mobile Telecommunications-2020 (IMT-2020)".
ETSI

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Release 1 6 ETSI TS 103 636-1 V1.4.1 (2023-01)
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
Fixed Termination point (FT): operational mode of RD where RD initiates coordinates local radio resources, provides
information how other RDs may connect and communicate with it
operating channel: single continuous part of radio spectrum with a defined bandwidth where RDs transmits and/or
receives
Portable Termination point (PT): operational mode of RD where RD selects another RD, which is in FT mode, for
association
Radio Device (RD): device with radio transmission and reception capability, which can operate in FT and/or PT mode
resource: variable length time unit defined in subslot(s) or slot(s) in single operating channel that RD is using for
transmission or reception of physical layer packet
NOTE: Resource can be contentious or contention free, i.e. scheduled.
3.2 Symbols
For the purposes of the present document, the following symbols apply:
RD RD operating in FT mode
FT
RD RD operating in both FT and PT mode
FT,PT
RD RD operating in PT mode
PT
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partnership Project
th
5G 5 Generation
ARQ Automatic Repeat reQuest
BCC Broadcast Control
BCCH Broadcast Control Channel
BLER Block Error Ratio
BPSK Binary Phase Shift Keying
BSC Beacon Scanning Control
CCC Connection Configuration Control
CCCH Common Control CHannel
CP-OFDM Cyclic Prefix Orthogonal Frequency Division Multiplexing
CRC Cyclic Redundancy Check
CVG Convergence (layer)
DCCH Dedicated Control CHannel
DCH Dedicated Channel
DECT Digital Enhanced Cordless Telecommunications
DL Downlink
DLC Data Link Control (layer)
DLC-A DLC Service type 2: DLC ARQ
DLC-S DLC Service type 1: Segmentation mode
DLC-T DLC Service type 0: Transparent mode
DTCH Dedicated Traffic Channel
EP EndPoint
FDMA Frequency Division Multiple Access
FEC Forward Error Correction
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Release 1 7 ETSI TS 103 636-1 V1.4.1 (2023-01)
FFT Fast Fourier Transform
FP Fixed Part
FT Fixed Termination point
GI Guard Interval
HARQ Hybrid Automatic Repeat Request
ID IDentity
IMT International Mobile Telecommunications
IoT Internet of Things
ITU-R International Telecommunication Union - Radiocommunication sector
LBT Listen Before Talk
LRC Local Radio Control
LSB Least Significant Bit
MAC Medium Access Control
MCS Modulation and Coding Scheme
MIMO Multiple Input Multiple Output
mMTC massive Machine Type Communication
MSB Most Significant Bit
MTCH Multicast (Broadcast) Traffic Channel
N3IWF Non-3GPP Inter-Working-Function
NG-RAN Next Generation RAN
NR New Radio
OFDM Orthogonal Frequency Division Multiplexing
PCC Physical Control Channel
PCCH Paging Control Channel
PCH/BCH Paging and Broadcast Channel
PDC Physical Data Channel
PDU Protocol Data Unit
PHY Physical Layer
PLMN Public Land Mobile Network
PT Portable Termination point
PTC Paging Transmission Control
QAM Quadrature Amplitude Modulation
QoS Quality of Service
QPSK Quadrature Phase Shift Keying
RAC Random Access Control
RACH Random Access Channel
RAN Radio Access Network
RD Radio Device
RF Radio Frequency
RIT Radio Interface Technology
RSSI Received Signal Strength Indicator
RX Receiver
RX-TX Receive-Transmit
SAP Service Access Point
SDU Service Data Unit
SRIT Set of RITs
TDD Time Division Duplex
TDMA Time Division Multiple Access
TNGF Trusted Non-3GPP Gateway Function
TX Transmitter
UE User Equipment
UL Uplink
ULE Ultra Low Energy
URLLC Ultra-Reliable Low Latency Communication
WAN Wide Area Networks
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Release 1 8 ETSI TS 103 636-1 V1.4.1 (2023-01)
4 General
4.1 Introduction
DECT-2020 NR is a Radio Interface Technology (RIT) designed to provide a slim but powerful technology foundation
for wireless applications deployed in various use cases and markets. This radio interface technology supports all kind of
applications including, but not limited to Cordless Telephony, Audio Streaming Applications, Professional Audio
Applications, consumer and industrial applications of Internet of Things (IoT) such as industry and building automation
and monitoring, utility and smart city applications, and in general solutions for local area deployments (indoor or
outdoor) for Ultra-Reliable Low Latency Communication (URLLC) and massive Machine Type Communication
(mMTC) as envisioned by ITU-R for IMT-2020.
DECT-2020 NR is recognized in Recommendation ITU-R M.2150 [i.2] as a component RIT fulfilling the IMT-2020
requirements of the IMT-2020 use scenarios URLLC and mMTC. The Set of Radio Interface Technology (SRIT) called
"DECT 5G SRIT" is involving 3GPP NR and DECT-2020 NR.
In general, DECT-2020 NR as a technology foundation is targeted for local area wireless applications, which can be
deployed anywhere by anyone at any time. The technology supports autonomous and automatic operation with minimal
maintenance effort. Where applicable, interworking functions to Wide Area Networks (WAN). e.g. PLMN, satellite,
fibre, and internet protocols foster the vision of a network of networks.
DECT-2020 NR can be used as a foundation for:
• very reliable Point-to-Point and Point-to-Multipoint Wireless Links provisioning (e.g. cable replacement
solutions);
• local area Wireless Access Networks following a star topology as in classical DECT deployment supporting
URLLC use cases; and
• self-organizing Local Area Wireless Access Networks following a mesh network topology, which enables to
support mMTC use cases.
DECT-2020 NR applies similar design principles as in legacy DECT and DECT ULE. Especially the inherent feature of
automatic interference management allows deployments without extensive frequency planning. The Mesh networking
capability of DECT-2020 NR enables application-driven network topologies and deployments in e.g. IoT and mMTC
use scenarios such that the link budget of classical cellular base-station to user equipment constellations is no longer a
limiting factor.
The DECT-2020 NR physical layer is in principle suited for addressing frequency bands below 6 GHz. The physical
layer employs Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) combined with Time Division
Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA) in a Time Division Duplex (TDD)
communication manner. The physical layer employs multiple numerologies, with different subcarrier spacings and
corresponding Cyclic Prefix lengths and FFT sizes, allowing operation with different channel bandwidths, and optimize
operations in different frequency bands and propagation environments. The physical layer supports advanced channel
coding (Turbo coding) for both control and physical channels and Hybrid ARQ with incremental redundancy, which
enables fast re-transmission. Advanced channel coding together with Hybrid ARQ ensures very reliable
communication.
Additionally, the physical layer supports, fast link adaptation, transmit and receiver diversity, as well as MIMO
operations up to 8 streams.
DECT-2020 NR (i.e. PHY layer numerology and MAC algorithms) is designed to enable coexistence with legacy
DECT and DECT evolution in current frequency bands allocated to DECT.
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Release 1 9 ETSI TS 103 636-1 V1.4.1 (2023-01)
4.2 Overview of the parts of DECT-2020 Technical
Specifications
Release 1 of the DECT-2020 NR technical specifications defines the Radio Interface Technology (RIT) by the
following parts:
• ETSI TS 103 636-1 (the present document): "DECT-2020 New Radio (NR); Part 1: Overview".
• ETSI TS 103 636-2: "DECT-2020 New Radio (NR); Part 2: Radio reception and transmission
requirements" [1].
• ETSI TS 103 636-3: "DECT-2020 New Radio (NR); Part 3: Physical layer" [2].
• ETSI TS 103 636-4: "DECT-2020 New Radio (NR); Part 4: MAC layer" [3].
• ETSI TS 103 636-5: "DECT-2020 New Radio (NR); Part 5: DLC and Convergence layers" [4].
ETSI TS 103 636 series will be accompanied by a feature and/or application-driven technical specification set, which is
organized as a multi-part deliverable, delivering profiles and application specific solutions for various industries.
ETSI TS 103 636-1 is the present document.
ETSI TS 103 636-2 [1] establishes the minimum RF requirements for DECT-2020 New Radio (NR) Radio Devices
(RDs). These requirements cover both Fixed Termination point (FT) as well as Portable Termination point (PT). That
document also provides a list of supported frequency bands.
ETSI TS 103 636-3 [2] specifies the physical layer (PHY) and interaction between PHY and MAC layer.
ETSI TS 103 636-4 [3] specifies MAC layer and interaction between MAC layer and physical layer and higher layers.
ETSI TS 103 636-5 [4] specifies the Data Link Control (DLC) and Convergence layers.
5 System and Network Architectures
5.1 Wireless Point-to-Point and Point-to-Multipoint Links
Wireless Point-to-Point links involve two radio devices communicating with each other. A typical application is the
cable replacement by a wireless link established between two radio devices requiring communicating with each other.
Compared to wireline systems, wireless comes with the benefit that point to multipoint communication is an inherent
feature of radio propagation, so that the support of broadcast and multicast messages from one point to multiple points
is just a matter of protocol.
The radio connection between two or more radio devices is enabled by one RD selecting to operate in FT mode (RD )
FT
and initiate radio resource coordination and beacon transmissions. Other RD(s) perform association procedure in PT
mode (RD ) with the RD .
PT FT
5.2 Local Area Wireless Access Networks in Cellular Network
Topology
A single-cell network topology involves in principle two types of Radio Devices (RDs): an RD operates in FT mode
(RD ) as a base station, which is a component of the fixed network infrastructure, other RDs operate PT mode (RD ).
FT PT
RD is coordinating radio resources, and serves a communication cell by being the central communication point for
FT
, which can be portable device.
RDPT
A multi-cell topology is a deployment of multiple RD as base stations in a fixed network infrastructure, where each
FT
base station is serving its own dedicated cell area and RDPT can move from one cell area to the other.
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Release 1 10 ETSI TS 103 636-1 V1.4.1 (2023-01)
5.3 Mesh network topology
5.3.1 Introduction
In DECT-2020 mesh network devices can communicate directly to each other extending the range of network and
increasing the reliability of communication. The mode of the involved radio devices may change autonomously
depending the context of the communication. Each radio device can act as a node transmitting a message, as a node
forwarding any message from another radio device or as a node being the destination of a message. Each radio device
can communicate directly (device to device) or, if not in range, indirectly - via other radio devices establishing a
communication route - with each other which minimizes the probability of outage.
Mesh topology can support high device densities and the autonomous routing provides the ability to adapt dynamically
mobile users and interference.
Mesh operation supports autonomous routing. In order to achieve efficient mMTC operation the mesh system is
scalable to a very high number of devices in a network, the routing is based on cost value, without the need to maintain
routing tables in each device.
The key requirements of how the scalability can be achieved are:
• All radio devices can route data. Whether RD is routing data is based on an autonomous decision of the RD. In
addition, an RD may be configured to operate in PT mode only, e.g. due to low battery resources.
• Radio devices take local decisions of the radio resources, e.g. how radio devices use Hybrid ARQ, select
modulation and coding and so forth in each radio link.
• Radio devices may change their operating mode between FT mode (RD ), PT mode (RD ), or both FT and
FT PT
PT modes (RD ), autonomously based on local decisions.
FT,PT
• No central coordinator(s), enabling the massive scale of the network.
• Radio device operating in RD or RD mode coordinates local radio resources.
FT FT, PT
).
• Support of multiple backend connected Radio devices that operate in FT mode (RDFT
• RDs can operate with multiple radio channels.
5.3.2 Mesh system operation
The mesh system operation is
...