Digital Enhanced Cordless Telecommunications (DECT); Integrated Services Digital Network (ISDN); DECT/ISDN interworking for intermediate system configuration; Interworking and profile specification

To specify how ISDN services can be provided over a DECT link. This document describes the DECT intermediate system reference configuration which is used where the DECT Fixed-System (DFS) and DECT Portable-System (DPS) together form an intermediate system to a separate ISDN-TE at the portable side.

Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Digitalno omrežje z integriranimi storitvami (ISDN) - Medsebojno delovanje DECT/ISDN za vmesne sisteme - Medsebojno delovanje in profil specifikacij

General Information

Status
Published
Publication Date
31-Aug-2001
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Sep-2001
Due Date
01-Sep-2001
Completion Date
01-Sep-2001

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SLOVENSKI STANDARD
SIST ETS 300 822:2001
01-september-2001
'LJLWDOQHL]EROMãDQHEUH]YUYLþQHWHOHNRPXQLNDFLMH '(&7 'LJLWDOQRRPUHåMH]
LQWHJULUDQLPLVWRULWYDPL ,6'1 0HGVHERMQRGHORYDQMH'(&7,6'1]DYPHVQH
VLVWHPH0HGVHERMQRGHORYDQMHLQSURILOVSHFLILNDFLM
Digital Enhanced Cordless Telecommunications (DECT); Integrated Services Digital
Network (ISDN); DECT/ISDN interworking for intermediate system configuration;
Interworking and profile specification
Ta slovenski standard je istoveten z: ETS 300 822 Edition 1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
'(&7
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 822:2001 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 822:2001
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SIST ETS 300 822:2001
EUROPEAN ETS 300 822
TELECOMMUNICATION April 1998
STANDARD
Source: DECT Reference: DE/DECT-030039
ICS: 33.020
Key words: DECT, ISDN, interworking, profile, radio
Digital Enhanced Cordless Telecommunications (DECT);
Integrated Services Digital Network (ISDN);
DECT/ISDN interworking for intermediate system configuration;
Interworking and profile specification
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
Internet: secretariat@etsi.fr - http://www.etsi.fr - http://www.etsi.org
Tel.: +33 4 92 94 42 00 - Fax: +33 4 93 65 47 16

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.
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SIST ETS 300 822:2001
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ETS 300 822: April 1998

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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ETS 300 822: April 1998
Contents

Foreword .......................................................................................................................................................9

Introduction....................................................................................................................................................9

1 Scope ................................................................................................................................................11

2 Normative references........................................................................................................................11

3 Definitions and abbreviations ............................................................................................................13

3.1 Definitions ..........................................................................................................................13

3.2 Abbreviations .....................................................................................................................15

3.3 Symbols .............................................................................................................................16

4 Interworking requirements.................................................................................................................17

4.1 Reference configurations and interfaces ...........................................................................17

4.1.1 Reference configurations ..............................................................................17

4.1.2 ISDN interfaces .............................................................................................17

4.2 Service requirements.........................................................................................................18

4.2.1 Bearer service requirements .........................................................................18

4.2.2 Teleservice requirements..............................................................................18

4.2.3 General aspects on error performance .........................................................18

4.2.4 Supplementary service requirements............................................................19

5 Protocol architecture .........................................................................................................................20

5.1 General ..............................................................................................................................20

6 Interworking procedures....................................................................................................................21

6.1 Procedural overview ..........................................................................................................21

6.2 DECT signalling link management.....................................................................................22

6.2.1 General description .......................................................................................22

6.2.2 Activation from the ISDN network .................................................................22

6.2.3 Activation from the ISDN terminal .................................................................23

6.2.4 Release of the signalling link.........................................................................24

6.3 U-plane and B-channel management................................................................................24

6.3.1 U-plane management....................................................................................24

6.3.2 B-channel management ................................................................................27

6.4 L2 address management...................................................................................................28

6.5 Outgoing call procedures...................................................................................................28

6.6 Incoming call procedures...................................................................................................30

6.6.1 Point to multipoint configuration ....................................................................30

6.6.2 Point to point configuration............................................................................32

6.7 Release procedures...........................................................................................................34

6.7.1 Release from the ISDN network....................................................................34

6.7.2 L2 disconnection from the ISDN network (point to point only) ......................35

6.7.3 Release from the ISDN terminal ...................................................................36

6.7.4 L2 disconnection from the ISDN terminal......................................................37

7 Physical layer procedures .................................................................................................................37

7.1 General requirement..........................................................................................................37

7.2 Minimum Normal Transmit Power (NTP)...........................................................................37

7.3 Radio receiver sensitivity ...................................................................................................37

7.4 Z-field requirement.............................................................................................................37

7.5 Sliding collision detection...................................................................................................38

7.6 Synchronization window.....................................................................................................38

8 MAC layer procedures.......................................................................................................................38

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8.1 MAC layer signalling procedures....................................................................................... 38

8.1.1 Downlink broadcast ...................................................................................... 38

8.1.1.1 NT message........................................................................ 38

8.1.1.2 QT- static system information ............................................. 39

8.1.1.3 QT - FP capabilities ............................................................ 39

8.1.1.4 QT Extended FP capabilities .............................................. 40

8.1.1.5 QT - SARI list contents ....................................................... 40

8.1.1.6 Paging broadcast: short page ............................................. 41

8.1.1.7 Paging broadcast: zero page .............................................. 42

8.1.2 Activation of the signalling connection.......................................................... 42

8.1.2.1 General requirement ........................................................... 42

8.1.2.2 Activation from the ISDN network....................................... 42

8.1.2.3 Activation from the ISDN terminal....................................... 44

8.1.2.4 MBn advanced connection control messages .................... 46

8.1.2.5 Associated procedures ....................................................... 46

8.1.2.5.1 Timer T200 management..................... 46
8.1.2.5.2 Counter N200 management................. 46

8.1.2.6 Exceptional case................................................................. 47

8.1.2.6.1 Bearer setup fails or timer T200 expiry 47

8.1.3 Release of signalling link .............................................................................. 48

8.1.3.1 MBn release message ........................................................ 50

8.1.4 Dynamic C-plane switching: MAC layer procedures..................................... 50

8.1.4.1 Dynamic switching CF to CS: only DIFS initiated................ 50
8.1.4.2 Dynamic switching CS to CF: DIPS initiated....................... 53
8.1.4.3 Dynamic switching CS to C : DIFS initiated....................... 54
8.1.4.4 Dynamic switching CS x to CS y: only DIFS initiated.......... 57
8.1.4.5 Dynamic switching CS x double to CS x full: only DIFS

initiated................................................................................ 58

8.1.4.6 Associated procedures ....................................................... 60

8.1.4.6.1 Associated procedures: DIFS side....... 60
8.1.4.6.2 Associated procedures: DIPS side....... 60

8.2 MAC Layer U-plane procedures........................................................................................ 60

8.2.1 U-plane connection setup procedure............................................................ 60

8.2.1.1 MBn messages advanced connection control .................... 62

8.2.2 U-plane connection release procedure......................................................... 62

8.2.2.1 MBn release message ........................................................ 63

8.3 Signalling and U-plane connections: Timer T201 management ....................................... 64

8.3.1 Timer T201 ................................................................................................... 64

8.3.2 Timer T201 expiry......................................................................................... 64

9 DLC layer procedures....................................................................................................................... 64

9.1 DLC layer signalling procedures ....................................................................................... 64

9.1.1 Class B link establishment............................................................................ 64

9.1.2 Associated procedure................................................................................... 66

9.1.2.1 Timer management.............................................. 66

9.1.2.2 Re-transmission counter management............................... 66

9.1.2.3 Multiple frame operation variables ...................................... 66

9.1.3 Class B acknowledged information transfer ................................................. 67

9.1.3.1 Acknowledgement with an I_frame..................................... 67
9.1.3.2 Acknowledgement with a RR_frame................................... 68
9.1.3.3 Acknowledgement with an RNR_frame .............................. 70
9.1.3.4 Acknowledgement with an REJ_frame ............................... 71

9.1.4 Segmentation of NWK layer message.......................................................... 71

9.1.5 Associated procedure(s)............................................................................... 71

9.1.5.1 Timer management.............................................. 71

9.1.5.2 Timer expiry.......................................................... 72

9.1.6 Link suspension and resumption .................................................................. 72

9.1.7 Link release .................................................................................................. 72

9.2 DLC Layer U-plane procedures......................................................................................... 73

9.2.1 FU1 frame operation..................................................................................... 73

9.2.2 LU7 data bearer service ............................................................................... 73

9.2.3 LU8 service................................................................................................... 74

9.2.3.1 Physical layer service.......................................................... 74

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9.2.3.2 MAC layer service................................................................74

9.2.3.3 DLC layer service ................................................................74

10 Network layer procedures .................................................................................................................74

10.1 Network layer C-plane procedures ....................................................................................74

10.1.1 General overview...........................................................................................74

10.1.2 Establishment of the signalling channel ........................................................75

10.1.2.1 Indirect DIFS initiated link establishment.............................75

10.1.2.2 Direct DIPS initiated link establishment...............................76

10.1.3 Transmitting of D-channel data .....................................................................77

10.2 Network Layer U-plane procedures ...................................................................................78

10.2.1 Establishment of DECT-U-planes and their switching to B-channels ...........78

10.2.1.1 Establishment of the DECT-U-planes..................................79

10.2.1.2 Switching of U-plane to B-channel.......................................80

10.2.2 Release procedures ......................................................................................82

10.2.3 Switching of the B-channel............................................................................82

10.3 Mobility and security features.............................................................................................83

10.3.1 Mobility and security features: additional requirements.................................84

11 IWU procedures ................................................................................................................................84

11.1 Link association entity........................................................................................................84

11.1.1 General..........................................................................................................84

11.1.2 Normal procedures........................................................................................84

11.1.2.1 Transfer of broadcast L3 messages....................................84
11.1.2.2 Transfer of L 3 messages on a point-to-point L 2 link .........84
11.1.2.2.1 LA-establishment ..................................84
11.1.2.2.2 LA data transfer ....................................85
11.1.2.2.3 LA release.............................................85

11.1.3 Exceptional handling and supervision ...........................................................85

11.1.3.1 Rejection of ISDN-L2 establishment....................................85

11.1.3.2 Rejection of a transfer request at the C-plane-channel.......85

11.1.3.3 CEI-problems.......................................................................86

11.1.3.4 L2-command coding problems ............................................86

11.1.4 Supervisory....................................................................................................86

11.1.4.1 Monitoring of ISDN-L2 links by the DIPS.............................86

11.1.5 LAE parameters ............................................................................................86

11.2 Layer 3 monitoring .............................................................................................................86

11.3 State machine....................................................................................................................87

11.3.1 General overview...........................................................................................87

11.3.2 IWU call states ..............................................................................................87

11.3.3 State transitions.............................................................................................87

11.3.4 Parameters....................................................................................................88

11.4 Actions upon missing DECT resources .............................................................................89

11.4.1 General..........................................................................................................89

11.4.2 Actions of the DIFS .......................................................................................89

11.4.2.1 The signalling link cannot be established ............................89

11.4.2.1.1 Point-to-point configuration...................89
11.4.2.1.2 Point-to-multipoint configuration ...........89

11.4.2.2 The signalling link is lost......................................................89

11.4.2.3 An U-plane-channel cannot be established.........................89
11.4.2.3.1 Point-to-point configuration...................89
11.4.2.3.2 Point-to-multipoint configuration ...........89

11.4.2.4 An U-plane-channel is lost...................................................89

11.4.2.4.1 Point-to-point configuration and
outgoing call in a point-to-multipoint
configuration .........................................89
11.4.2.4.2 Point-to-multipoint configuration,
incoming call .........................................90

11.4.3 Actions of the DIPS .......................................................................................90

11.4.3.1 The signalling link cannot be established or is lost..............90
11.4.3.2 An U-plane-channel cannot been established.....................90

11.4.3.3 An U-plane-channel is lost...................................................90

11.5 Other interworking functions ..............................................................................................90

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11.5.1 Call hold........................................................................................................ 90

11.5.2 Fall back procedure ...................................................................................... 90

11.5.3 Terminal portability ....................................................................................... 90

12 Dynamic switching procedures......................................................................................................... 91

12.1 Dynamic switching procedures between DECT signalling channels................................. 91

12.1.1 First establishment of signalling bearer (CF)................................................ 92

12.1.2 General description of the C-plane switching procedure.............................. 93

12.1.3 Switching from CF to CS channel, only DIFS initiated.................................. 93

12.1.4 Switching between CS and CS channel, only DIFS initiated ........................ 94

12.1.5 Switching from CS to CF, DIFS initiated....................................................... 95

12.1.6 Switching from CS to CF, DIPS initiated....................................................... 96

12.1.7 LCN - management ...................................................................................... 97

12.1.8 Conditions for dynamic signalling channel switching.................................... 98

12.2 Dynamic switching procedures between DECT U-planes................................................. 98

12.2.1 Dynamic switching procedures from LU1 to LU7 ......................................... 98

12.2.2 Dynamic switching procedures from LU7 to LU1 ....................................... 101

12.2.2.1 Procedure description ....................................................... 101

12.2.2.1.1 Associated procedures....................... 105

12.2.3 Dynamic switching procedures from LU1 to LU8 ....................................... 105

12.2.4 Dynamic switching procedures from U-plane LU8 to LU1.......................... 106

12.2.5 Dynamic switching procedures from LU7 to LU8 ....................................... 107

12.2.5.1 Procedure description ....................................................... 108

12.2.6 Dynamic switching procedures from LU8 to LU7 ....................................... 109

12.2.6.1 Procedure description ....................................................... 110

13 Maintenance ................................................................................................................................... 111

13.1 Exchange of operation and maintenance information..................................................... 111

14 Coding ............................................................................................................................................ 112

14.1 IWU-INFOrmation for DECT/ISDN intermediate system ................................................ 112

14.2 IWU to IWU for DECT/ISDN intermediate system.......................................................... 112

14.2.1 C-plane specific .......................................................................................... 113

14.2.1.1 Coding for "release required"............................................ 113

14.2.2 U-plane specific .......................................................................................... 114

14.2.3 Operation and maintenance specific .......................................................... 114

Annex A (informative): Modifications to EN 300 175............................................................................ 116

A.1 Modifications to the MAC layer (EN 300 175-3 [3]) ........................................................................ 116

A.1.1 Specific for U-plane switching procedures...................................................................... 116

A.1.2 Specific for C-plane switching procedure........................................................................ 116

A.1.3 General............................................................................................................................ 117

A.2 Modifications to the DLC layer (EN 300 175-4) .............................................................................. 117

A.2.1 General............................................................................................................................ 117

A.2.1.1 LU7 64 kbit/s data bearer service............................................................... 117

A.2.1.2 LU8 bearer service ..................................................................................... 118

A.2.1.2.1 Physical layer service........................................................ 118

A.2.1.2.2 MAC layer service ............................................................. 118

A.2.1.2.3 DLC layer service.............................................................. 119

A.3 Modifications to the NWK layer (EN 300 175-5)............................................................................. 119

A.3.1 General............................................................................................................................ 119

A.3.3 Amendment to basic service IE....................................................................................... 120

Annex B (informative): Handover and collision scenarios .................................................................... 121

B.1 C-plane switching procedures ........................................................................................................ 121

B.1.1 C-plane switching: handover collision scenarios............................................................. 121

B.1.1.1 CF to CS switching procedure: concurrent handover scenario .................. 121

B.1.1.2 CS to CF switching procedure: concurrent handover scenario .................. 122

B.1.1.3 Dynamic switching CF to CS bearer handover collision ............................. 123

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B.1.1.4 Conclusions.................................................................................................124

B.1.2 C-plane switching: ciphering procedure collision scenarios ............................................124

B.1.2.1 Dynamic switching CF to CS ciphering procedure collision ........................124

B.2 LU service switch ............................................................................................................................126

B.2.1 General ............................................................................................................................126

B.2.2 Switching from LU1 to LU7: bearer handover collision....................................................126

Annex C (informative): Examples for segmentation of ISDN messages...............................................127

Annex D (Informative): LU 7 service establishment ..............................................................................128

History........................................................................................................................................................129

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ETS 300 822: April 1998
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 of this ETS: 20 March 1998
Date of latest announcement of this ETS (doa): 31 July 1998
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 January 1999
Date of withdrawal of any conflicting National Standard (dow): 31 January 1999
Introduction

For interworking between an Integrated Services Digital Network (ISDN) and a DECT system, two profiles

have been defined. The first profile is the DECT/ISDN profile for end system configuration. The second

profile is the DECT/ISDN profile for intermediate system configuration. The first profile is also called the

"ISDN Access Profile (IAP)". The second profile is also called the "Intermediate ISDN access Profile (IIP)".

The IAP applies when a Fixed Part (FP) and a Portable Part (PP) together constitute an ISDN terminal.

The ISDN applications and any supplementary services are located in the PP (no Interworking Unit (IWU)

in the PP). The FP maps the received layer 3 messages at the ISDN interface to the DECT layer 3

messages and vice-versa.

The IIP applies when a FP and a PP together constitute a gateway between an ISDN network and an

ISDN terminal. The FP and the PP have an IWU, which maps the messages between the ISDN interface

and the DECT air interface.

This ETS specifies the DECT/ISDN profile for intermediate system configuration only. For details on

DECT/ISDN profile for end system configuration, see EN 300 434-1 [28].
This ETS specifies how ISDN services are provided over the DECT air interface.

One of the main objectives is to describe how the ISDN services are mapped across the DECT air

interface in a formal way, so that equipment interoperability of different manufacturers' equipment can be

achieved.
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