ETSI ETS 300 700 ed.1 (1997-03)

Digital Enhanced Cordless Telecommunications (DECT); Wireless Relay Station (WRS)

DE/DECT-050069

Digitalne izboljšane brezvrvične telekomunikacije (DECT) – Brezžična relejna postaja (WRS)

General Information

• Status: Published
• Publication Date: 10-Mar-1997
• Technical Committee: DECT 5 - Radio and speech experts
• Current Stage: 12 - Completion
• Due Date: 14-Mar-1997
• Completion Date: 11-Mar-1997
• Ref Project: SIST ETS 300 700 E1:2003 - Digital Enhanced Cordless Telecommunications (DECT); Wireless Relay Station (WRS)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 700 E1:2003
01-december-2003
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Digital Enhanced Cordless Telecommunications (DECT); Wireless Relay Station (WRS)
Ta slovenski standard je istoveten z: ETS 300 700 Edition 1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
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SIST ETS 300 700 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 700 E1:2003

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SIST ETS 300 700 E1:2003
EUROPEAN ETS 300 700
TELECOMMUNICATION March 1997
STANDARD
Source: ETSI EP DECT Reference: DE/DECT-050069
ICS: 33.020
Key words: DECT, WRS
Digital Enhanced Cordless Telecommunications (DECT);
Wireless Relay Station (WRS)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
X.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
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 1997. All rights reserved.

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Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword .7
1 Scope .9
2 Normative references.9
3 Definitions and abbreviations .10
3.1 Definitions .10
3.2 Abbreviations .11
4 Wireless Relay Station (WRS) .12
4.1 Introduction .12
4.2 Description.12
4.2.1 PHL layer functions .13
4.2.2 MAC layer functions .13
4.2.3 Data Link Control (DLC) layer functions.13
4.2.4 NWK layer functions.13
4.2.4.1 Over-the-air maintenance.13
4.2.5 Identities .14
4.3 Services .14
4.4 Procedures.14
4.4.1 PHL layer.14
4.4.2 MAC layer.14
4.4.2.1 Extended fixed part capabilities.14
4.4.2.2 Hop control .14
5 Cordless Radio Fixed Part (CRFP) .15
5.1 Description.15
5.1.1 General.15
5.1.2 Reference model.15
5.1.3 MAC layer functions .15
5.1.3.1 General.15
5.1.3.2 Frame multiplexing structure .16
5.1.3.3 Logical channel mapping.17
5.1.3.4 Quality Control and Flow Control.17
5.1.4 NWK layer functions.17
5.1.5 Identities .18
5.1.5.1 Identities and addressing.18
5.1.5.2 Subscription data.18
5.2 Messages.18
5.2.1 MAC layer control.18
5.3 Procedures.19
5.3.1 MAC layer.19
5.3.1.1 Connection Oriented mode (C/O) procedures at CRFP.19
5.3.1.1.1 Creation of a Relay Multi Bearer
Control (RMBC) .19
5.3.1.1.2 Normal C/O bearer set-up .19
5.3.1.1.3 Dual C/O bearer set-up.20
5.3.1.1.4 C/O connection release .21
5.3.1.1.5 C/O abnormal connection release .22
5.3.1.2 CRFP connection suspend and resume.24
5.3.1.3 C/O bearer handover.25
5.3.2 DLC layer.27
5.3.2.1 Connection handover.27
5.3.2.2 DLC variables .27
5.3.3 NWK layer .28
5.3.4 Security.29

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5.3.4.1 General . 29
5.3.4.2 CRFP initialization of PT cipher key. 31
5.3.5 Management. 31
5.3.5.1 CRFP MAC modes . 31
5.3.5.2 CRFP states and state transitions . 31
5.4 Example operation of CRFP . 32
5.4.1 Introduction . 32
5.4.2 Example GAP procedures . 32
6 Repeater Part (REP). 32
6.1 Description . 32
6.1.1 General . 32
6.1.2 Reference model . 32
6.1.3 MAC layer functions. 33
6.1.3.1 General . 33
6.1.3.2 Frame multiplexing. 33
6.1.3.2.1 Quality control . 35
6.1.3.2.2 Bearers selection . 36
6.1.3.2.3 Establishment of the double duplex
bearer. 36
6.1.3.2.4 Double simplex bearers . 36
6.1.3.3 Logical channel mapping . 36
6.1.4 DLC functions . 37
6.1.5 NWK layer functions . 37
6.1.6 Management functions . 38
6.1.6.1 Identities and addressing . 38
6.2 Definitions. 38
6.3 Messages. 38
6.3.1 MAC control (Mt). 38
6.4 Procedures. 38
6.4.1 MAC layer . 38
6.4.1.1 C/O connection . 38
6.4.1.1.1 Physical set-up procedure. 38
6.4.1.1.2 Creation of a double duplex bearer. 40
6.4.1.1.3 Mapping procedure . 40
6.4.1.2 REP relayed C/O connection . 41
6.4.1.2.1 IWU . 41
6.4.1.2.2 REP relayed C/O single duplex bearer
set-up . 42
6.4.1.2.3 REP relayed C/O bearer release. 43
6.4.1.2.4 REP relayed C/O bearer handover . 43
6.4.2 DLC layer. 44
6.4.2.1 REP relayed C/O connection handover . 44
6.4.3 Management. 44
6.4.3.1 REP states . 44
6.4.3.2 REP actions and states transitions . 45
6.4.3.2.1 Actions in the Idle_Unlocked and
Active_Unlocked states. 45
6.4.3.2.2 Actions in the Locked state . 45
6.4.3.2.3 Entry into the Active_Idle state. 45
6.4.3.2.4 Actions in the Active_Idle state . 46
6.4.3.2.5 Entry into the Active_Traffic state . 46
6.4.3.2.6 Actions in the Active_Traffic state. 46
6.4.3.3 Channel selection. 46
6.5 Example operation of REP. 47
Annex A (normative): The optional CRFP interface to REP . 55
A.1 Description. 55
A.1.1 General. 55
A.1.2 Frame multiplexing structure. 55
A.2 Messages . 56

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A.2.1 MAC layer .56
A.2.2 Hop control.56
A.3 Procedures.56
A.3.1 MAC layer .56
A.3.2 Channel selection .58
Annex B (normative): ETS 300 175 changes.59
B.1 Modifications to MAC layer specification, ETS 300 175-3.59
B.1.1 Modifications to subclause 7.1.4.59
B.1.2 Modifications to subclause 7.2.3.4.2.60
B.1.3 Modifications to subclause 10.5.1.1.61
B.1.4 Modifications to subclause 10.5.1.2.1.61
B.1.5 Modifications to subclause 10.5.1.3.1.61
B.2 Modifications to NWK layer specification, ETS 300 175-5.61
B.2.1 Modifications to subclause 7.7.18.61
History.62

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Digital Enhanced Cordless
Telecommunications (DECT) Project of the European Telecommunications Standards Institute (ETSI).
Transposition dates
Date of adoption: 21 February 1997
Date of latest announcement of this ETS (doa): 30 June 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 December 1997
Date of withdrawal of any conflicting National Standard (dow): 31 December 1997

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1 Scope
This European Telecommunication Standard (ETS) defines the Digital Enhanced Cordless
Telecommunications (DECT) Wireless Relay Station (WRS). A WRS is an additional building block for the
DECT fixed network.
This ETS defines provisions needed for a controlled and reliable application of the DECT WRS
infrastructure building block. These provisions are not related to any specific profile.
2 Normative references
This ETS incorporates, by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this ETS only when incorporated in it by amendment or revision. For undated references the latest
edition of the publication referred to applies.
[1] ETS 300 175-1: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 1:
Overview".
[2] ETS 300 175-2: "Radio Equipment and Systems (RES); Digital Enhanced
Cordless Telecommunications (DECT); Common Interface (CI); Part 2: Physical
layer (PHL)".
[3] ETS 300 175-3: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 3: Medium
Access Control (MAC) layer".
[4] ETS 300 175-4: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data
Link Control (DLC) layer".
[5] ETS 300 175-5: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 5: Network
(NWK) layer".
[6] ETS 300 175-6: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 6:
Identities and addressing".
[7] ETS 300 175-7: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 7: Security
features".
[8] ETS 300 175-8: "Radio Equipment and Systems (RES); Digital European
Cordless Telecommunications (DECT); Common Interface (CI); Part 8: Speech
coding and transmission".
[9] ETR 043: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); Common interface; Services and facilities
requirements specification".
[10] ETR 246: "Radio Equipment and Systems (RES); Digital European Cordless
Telecommunications (DECT); Application of DECT Wireless Relay Station
(WRS)".

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3 Definitions and abbreviations
3.1 Definitions
For the purposes of this ETS, the following definitions apply:
Cordless Radio Fixed Part (CRFP): A WRS that provides independent bearer control to a Portable radio
Termination (PT) and Fixed radio Termination (FT) for relayed connections.
Fixed Part (DECT Fixed Part) (FP): A physical grouping that contains all of the elements in the DECT
network between the local network and the DECT air interface.
NOTE 1: A DECT FP contains the logical elements of at least one FT, plus additional
implementation specific elements.
Fixed radio Termination (FT): A logical group of functions that contains all of the DECT processes and
procedures on the fixed side of the DECT air interface.
NOTE 2: A FT only includes elements that are defined in the DECT CI standard. This includes
radio transmission elements together with a selection of layer 2 and layer 3 elements.
Handover: The process of switching a call in progress from one physical channel to another physical
channel. These processes can be internal (see internal handover) or external (see external handover).
NOTE 3: There are two physical forms of handover, intra-cell handover and inter-cell handover.
Intra-cell handover is always internal. Inter-cell handover can be internal or external.
Inter Working Unit (IWU): A unit that is used to interconnect sub networks.
NOTE 4: The IWU contains the inter-working functions necessary to support the required sub
network inter-working.
Medium Access Control (MAC) Connection (CONNECTION): An association between one source MAC
Multi-Bearer Control (MBC) entity and one destination MAC MBC entity. This provides a set of related
MAC services (a set of logical channels), and it can involve one or more underlying MAC bearers.
Portable Part (DECT Portable Part) (PP): A physical grouping that contains all elements between the
user and the DECT air interface. PP is a generic term that may describe one or several physical pieces.
NOTE 5: A DECT PP is logically divided into one PT plus one or more Portable Applications
(PAs).
Portable radio Termination (PT): A logical group of functions that contains all of the DECT processes
and procedures on the portable side of the DECT air interface.
NOTE 6: A PT only includes elements that are defined in the DECT CI standard. This includes
radio transmission elements (layer 1) together with a selection of layer 2 and layer 3
elements.
Radio Fixed Part (RFP): One physical sub-group of a FP that contains all the radio end points (one or
more) that are connected to a single system of antennas.
Repeater Part (REP): A WRS which relay the information within the half frame time interval.
Wireless Relay Station (WRS): A physical grouping that combines elements of both PTs and FTs to
relay information on a physical channel from one DECT termination to a physical channel for another
DECT termination.
NOTE 7: The DECT termination can be a PT or an FT or another WRS.

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3.2 Abbreviations
For the purposes of this ETS, the following abbreviations apply:
AC Authentication Code
ARI Access Rights Identity
BMC Broadcast Message Control
C/O Connection Oriented mode
CK Cipher Key
CN Carrier Number
CRFP Cordless Radio Fixed Part
DCK Derived Cipher Key
DECT Digital Enhanced Cordless Telecommunications
DLC Data Link Control
ETR European Telecommunication Report
FMID Fixed part MAC Identity
FP Fixed Part
FT Fixed radio Termination
IPUI International Portable User Identity
IWU Inter Working Unit
KSG Key Stream Generator
LCE Link Control Entity
LLME Lower Layer Management Entity
MAC Medium Access Control
MBC Multi Bearer Control
MMI Man Machine Interface
NWK Network
OA&M Operation, Administration and Maintenance
PA Portable Application
PARI Primary Access Rights Identity
PARK Portable Access Rights Key
PHL Physical Layer
PMID Portable part MAC Identity
PP Portable Part
PT Portable radio Termination
PUN Portable User Number
REP Repeater Part
RFP Radio Fixed Part
RFPI Radio Fixed Part Identity
RMBC Relay Multi Bearer Control
RPN Radio fixed Part Number
RX Receive
SAP Service Access Point
SN Slot pair Number
TBC Traffic Bearer Control
TBR Technical Basis for Regulation
TPUI Temporary Portable User Identity
TX Transmit
WRS Wireless Relay station

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4 Wireless Relay Station (WRS)
4.1 Introduction
A WRS is a physical grouping that contains both Fixed radio Termination (FT) and Portable radio
Termination (PT) elements, and that transfers information between a Radio Fixed Part (RFP) and a
Portable Part (PP). The FT element acts towards a PP exactly as an ordinary RFP. The PT element acts
like a PP towards the RFP, and is locked to the closest RFP. The WRS contains inter-working between its
FT and its PT, including transparent transfer of the higher layer DECT services. WRS links may be
cascaded.
Compared to an RFP, a WRS may introduce capacity restrictions to the services offered. The restrictions
may increase with the number of cascaded WRS links (hops). Single WRS link applications can be
generally applied. However, special precautions are needed when applying cascaded WRS links. The
capacity may be too low, or there may be a need to adjust the echo control requirements.
A WRS shall comply with the general FT identities requirements for RFPs. Installing or adding a WRS to a
DECT infrastructure is not possible outside the control of the system operator/installer/owner, who
provides the required system identities, access rights and authentication/encryption keys.
4.2 Description
NWK
L
L
L
DLC
L
M
M
IWU
MAC
E
E
(FT) IWU (PT)
PHL
WRS
PT FT
Figure 1: WRS reference model, Protocol stack model

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The WRS, as shown in figure 1, provides inter-working on the DECT air interface between a PT and an
FT as described in ETS 300 175, Parts 1 to 8, [1] - [8].
The PT may also be the PT side of a WRS in a multi-hop scenario.
The reference model of figure 1 establishes the following basic principles of the WRS:
- inter-working with PTs as defined by ETS 300 175 , Parts 1 to 8, [1] - [8];
- inter-working with FTs as defined by ETS 300 175, Parts 1 to 8, [1] - [8], with additions defined in
this ETS;
- inter-working between PT and FT side is provided at Medium Access Control (MAC) layer and
Physical (PHL) layer;
- a logical grouping of PT and WRS operates as a PT;
- a logical grouping of FT and WRS operates as a FT.
Looking towards the PT the WRS is fully protocol transparent. The PT cannot distinguish the WRS from
any other RFP within an FT. Therefore, the WRS puts no additional requirements on the PT.
4.2.1 PHL layer functions
The WRS shall fulfil the following PHL layer requirements:
- the WRS shall for the relevant packet type meet the PP requirements in ETS 300 175-2 [2] when it
is acting as a PP, and meet the RFP requirements in ETS 300 175-2 [2] when it is acting as an
RFP, except that the timing requirements in ETS 300 175-2 [2], subclause 4.2.4. shall be met by all
WRS transmissions and that the requirement in ETS 300 175-2 [2], subclause 4.2.5 on difference
between reference timers shall be disregarded;
- Z-field mapping as defined in ETS 300 175-2 [2], subclause 4.8 shall be supported.
4.2.2 MAC layer functions
The WRS provides inter-working at the MAC layer. The WRS incorporates PT and FT functions as
defined in ETS 300 175-3 [3].
The WRS shall fulfil the obligatory requirements of ETS 300 175-3 [3], subclauses 11.4 and 11.6, with the
modifications as defined in this ETS.
4.2.3 Data Link Control (DLC) layer functions
The WRS may incorporate DLC layer PT functionality to support communication with the FT according to
ETS 300 175-4 [4].
4.2.4 NWK layer functions
The WRS may incorporate NWK layer PT functionality to support communication with the FT according to
ETS 300 175-5 [5].
4.2.4.1 Over-the-air maintenance
If Operation, Administration and Maintenance (OA&M) information transfer is supported, it may use the
<> information element (see ETS 300 175-5 [5], subclause 7.7.23) in NWK layer
messages. This element can accommodate unstructured user specific data. For over the air maintenance,
a link towards the WRS is created using the PP identity of the WRS.

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4.2.5 Identities
The WRS shall have a specific Radio fixed Part Number (RPN) identity and Portable Access Rights Key
(PARK). The RPN may be transferred by over-the-air maintenance procedures. For transferring the RPN
to the WRS, the Fixed Identity information element with identity type "ARI + RPN for WRS" should be
used.
The WRS may have additional specific PT identities when PT DLC and NWK layer functionality is
included.
4.3 Services
The WRS may be used in all applications as defined in ETR 043 [9]. Typical WRS applications are
presented in ETR 246 [10].
The WRS shall provide a relay service for MAC layer connection oriented, broadcast and connectionless
services as defined in ETS 300 175-3 [3], subclauses 5.6 and 5.7.
The WRS shall provide the services as given in table 1.
Table 1: WRS services
Offered service Support Comment
S.1 Transparency between PT and FT Yes
S.2 MAC services Yes All, see ETS 300 175-3 [3]
S.3 Over the air maintenance Optional
S.4 PT services Optional As applicable for a certain application (e.g.
(e.g. authentication) based on a profile)
4.4 Procedures
4.4.1 PHL layer
The WRS shall conform to the PT and FT procedures as defined by ETS 300 175-2 [2].
4.4.2 MAC layer
The WRS shall conform to the PT and FT procedures as defined by ETS 300 175-3 [3].
4.4.2.1 Extended fixed part capabilities
The FP can control the hop configuration and indicate the admitted WRS scenarios by means of the
extended fixed part capabilities message (see ETS 300 175-3 [3]).
The extended fixed part capabilities message shall be sent by all WRSs at least once every 8 multiframes,
and all WRSs shall understand this message. The WRS shall assume all WRS support bits being set to
"0" when the FT does not transmit the message.
4.4.2.2 Hop control
The WRS that is locked to an FT shall decrease the value HOPS (when > 0) of the corresponding WRS
type (CRFP or REP respectively; see chapters 5 and 6) in the received extended fixed part capabilities
message (see ETS 300 175-3 [3], subclause 7.2.3.5.2.1) for the transmission of its own extended fixed
part capability information.
NOTE: The number of hops should be no more than one. Use of more than one hop may be
sub
...