SIST EN 300 175-5 V1.6.1:2003

• Abstract:

  Maintenance update.

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
• ICS: 35.100.30 - Network layer
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 175-5 V1.6.1 (2002-02) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 5: Network (NWK) layer

SIST EN 300 175-5 V1.6.1:2003 is the Slovenian adoption of ETSI EN 300 175-5 V1.6.1, a maintenance update for the Digital Enhanced Cordless Telecommunications (DECT) Common Interface. It specifies the DECT Network (NWK) layer, which is layer 3 of the DECT CI, for call control, supplementary services, message services, mobility management, link control and lower-layer management between the Fixed radio Termination (FT) and Portable radio Termination (PT).

What does SIST EN 300 175-5 V1.6.1:2003 specify?

SIST EN 300 175-5 V1.6.1:2003 specifies the DECT NWK layer and organizes it from a layer overview through detailed message definitions and procedures to primitives and error handling. In practice, it tells implementers how DECT network-layer functions are structured, how messages are coded, and how the main procedures behave between FT and PT.

The document is laid out as follows:

• Clauses 1 to 3 cover scope, references, definitions and abbreviations.
• Clause 4 gives an overview of the NWK layer.
• Clause 5 gives procedure overviews for the main NWK entities.
• Clauses 6 to 8 define message contents and message structures.
• Clauses 9 to 15 describe the procedures for CC, SS, COMS, CLMS, MM, LCE and management.
• Clause 16 defines primitives.
• Clause 17 covers error and exception handling.

Annex	What it covers
A	Timers and NWK layer constants
B	CC state transitions at PT side and FT side
D	DECT standard 8-bit and 4-bit character sets
F	Higher layer capabilities and extended higher layer capabilities
G	Use of <<IWU-PACKET>> and <<IWU-TO-IWU>> elements
H	Nested procedures and stand-alone procedures, including location update and temporary identity assignment
I	DCDL-net procedures, examples and usage of PPs or FPs in DCDL-net

What are the key requirements of SIST EN 300 175-5 V1.6.1:2003?

The NWK layer is split into named functional entities

SIST EN 300 175-5 V1.6.1:2003 groups NWK behavior into Link Control Entity (LCE), Call Control (CC), Supplementary Services (SS), Connection Oriented Message Service (COMS), ConnectionLess Message Service (CLMS), Mobility Management (MM) and the Lower Layer Management Entity (LLME). Clause 4 says LCE establishes, operates and releases the C-plane link, while MM handles identities, authentication, location updating, on-air subscription and key allocation. In practice, this is the implementation map for a DECT stack: each function has a defined place and purpose.

Message coding is tightly structured

Clauses 6 to 8 define S-FORMAT and B-FORMAT messages, the Protocol Discriminator (PD), Transaction Identifier (TI), message type, and the information elements carried in each message. The standard also defines fixed-length and variable-length information elements, repeat indicators, codeset handling, locking and non-locking shift procedures, and character coding. This matters because two DECT products only interwork if they build and parse the same message structure in the same way.

Call Control covers the full call life cycle

Clause 9 defines CC states at PT and FT, including null, call initiated, overlap sending, call proceeding, call delivered, call present, call received, connect pending, active and release pending. It then describes outgoing and incoming call establishment, release, service change, packet mode procedures and emergency call handling. For users of the standard, this is the behavior expected when a call is set up, modified, suspended, resumed or cleared.

Service changes and packet mode are handled as explicit procedures

SIST EN 300 175-5 V1.6.1:2003 includes service change procedures for bandwidth changes, rerouting, service suspension and resumption, and modulation scheme change. It also includes packet mode access and packet mode suspend and resume for both C-plane and U-plane. In practice, this tells implementers how an active connection may be renegotiated instead of simply dropped and rebuilt.

Supplementary Services are supported both as call-related and call-independent functions

Clause 10 covers keypad protocol, feature key management protocol, functional protocol, co-existence of multiple protocols, and DECT standard and DECT specific supplementary services. The DECT specific set includes queue management, indication of subscriber number, control of echo control functions and cost information. This is important when a handset or base station must present supplementary services consistently, regardless of whether they are tied to an active call.

COMS and CLMS provide the message service behavior

Clause 11 defines COMS establishment, data transfer, suspend and resume, and release, with state models for PT and FT. Clause 12 defines CLMS for fixed length and variable length messages, including the transmission procedure at sending and receiving sides and the restrictions for portable-side initiated messages. In practice, these clauses support application traffic that is not ordinary circuit-style calling.

MM and LCE control identity, access and mobility

Clause 13 covers identification of PT, temporary identity assignment, authentication of PT, user and FT, location registration, detach, location update, access rights, key allocation, parameter retrieval, ciphering related procedures and external protocol information. Clause 14 covers direct and indirect link establishment, link maintenance, link suspend and resume, link release, message routing, broadcast announce and collective/group ringing. For a working DECT system, these procedures are the core of roaming, subscription control and network access.

Management and error handling define how the stack adapts and fails safely

Clause 15 covers service mapping and negotiation, resource management, management of MM procedures, call ciphering management, handover candidate and reference procedures, NWK layer set-up, test management and application assistance. Clause 17 defines how the system reacts to protocol discrimination errors, invalid transaction identifiers, message sequence problems, duplicate or missing information elements and non-mandatory element errors. In practice, these parts support interoperability, handover and negative testing.

What terms does SIST EN 300 175-5 V1.6.1:2003 define?

• Digital Enhanced Cordless Telecommunications (DECT) - the cordless telecommunications system family addressed by this standard.
• Network (NWK) layer - the DECT layer 3 functions covered by this part of the Common Interface.
• Fixed radio Termination (FT) - the fixed-side radio termination that exchanges NWK procedures with the PT.
• Portable radio Termination (PT) - the portable-side radio termination, typically the handset or terminal side.
• Link Control Entity (LCE) - the NWK entity that establishes, maintains, suspends and releases the C-plane link.
• Connection Oriented Message Service (COMS) - the NWK service for connection-oriented message exchange.
• Mobility Management (MM) - the NWK entity for identity handling, authentication, location procedures and access rights.

Who uses SIST EN 300 175-5 V1.6.1:2003?

SIST EN 300 175-5 V1.6.1:2003 is used by engineers who design DECT terminals, base stations and interworking units, and by software teams implementing the NWK layer in a DECT stack. It is also used by test laboratories, quality teams and system integrators when they need to verify call control, mobility, message formats, link control or supplementary service behavior. Buyers and specifiers can use it to check whether a product supports the DECT network-layer features they need.

Which standards are used with SIST EN 300 175-5 V1.6.1:2003?

Standard	Contribution in this document
EN 300 175-1	Shared DECT definitions used throughout the NWK layer
EN 300 175-4	Data Link Control (DLC) layer reference, including U-plane link numbering
EN 300 175-6	Portable user type coding and identity-related definitions
EN 300 403-1	Principles for variable-length information elements
EN 300 757	LRMS (E-profile) service reference
EN 300 765-1	RAP 1 profile and multiport CTA references
EN 300 765-2	RAP 2 profile reference
TS 101 863	DECT/UMTS interworking profile reference
ITU-T V.110	In-band negotiation and rate adaptation reference
ITU-T X.30	In-band negotiation and rate adaptation reference
ITU-T X.244	Structure of IWU information
ITU-T X.25	Call user data context for IWU information
ETS 300 133-1	ERMES 4-bit character reference used in alphanumeric coding

What does the SIST EN 300 175-5 V1.6.1:2003 document contain?

The document contains message summaries, information element coding rules, and detailed layouts for CC, SS, COMS, CLMS, MM and LCE messages. It also contains state models and procedure descriptions for call setup, release, mobility handling, paging, broadcast announce, handover-related management and service negotiation. Annexes add timer values, constants, state transitions, character sets, capability coding, interworking information handling, nested procedures and DCDL-net-specific procedure material.

SLOVENSKI STANDARD
01-december-2003
'LJLWDOQHL]EROMãDQHEUH]YUYLþQHWHOHNRPXQLNDFLMH'(&7±6NXSQLYPHVQLN&,±
GHO2PUHåQDSODVW1:.
Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 5:
Network (NWK) layer
Ta slovenski standard je istoveten z: EN 300 175-5 Version 1.6.1
ICS:
33.070.30 'LJLWDOQHL]EROMãDQH Digital Enhanced Cordless
EUH]YUYLþQHWHOHNRPXQLNDFLMH Telecommunications (DECT)
'(&7
35.100.30 Omrežni sloj Network layer
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 5: Network (NWK) layer
2 ETSI EN 300 175-5 V1.6.1 (2002-02)

Reference
REN/DECT-000194-5
Keywords
DECT, radio
ETSI
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© European Telecommunications Standards Institute 2002.
All rights reserved.
ETSI
3 ETSI EN 300 175-5 V1.6.1 (2002-02)
Contents
Intellectual Property Rights.14
Foreword.14
1 Scope.15
2 References.15
3 Definitions and abbreviations.19
3.1 Definitions.19
3.2 Abbreviations.21
4 Overview of the NWK layer .23
5 Overview of procedures .25
5.1 General.25
5.2 Overview of Call Control (CC) .26
5.2.1 General.26
5.2.2 Call establishment.26
5.2.2.1 Call setup.26
5.2.2.2 Service negotiation.26
5.2.3 Call connect.27
5.2.4 Call information.27
5.2.5 Service change.27
5.2.6 Call release.27
5.3 Overview of Supplementary Services (SS) .27
5.3.1 General.27
5.3.2 Keypad protocol.28
5.3.3 Feature key management protocol.28
5.3.4 Functional protocol.29
5.4 Overview of Connection Oriented Message Service (COMS).29
5.4.1 General.29
5.4.2 COMS establishment.29
5.4.3 Service negotiation.30
5.4.4 COMS connect.30
5.4.5 COMS data transfer .30
5.4.6 COMS suspend and resume.30
5.4.7 COMS release.30
5.5 Overview of ConnectionLess Message Service (CLMS).30
5.5.1 Fixed length message service.31
5.5.2 Variable length message service.31
5.6 Overview of Mobility Management (MM) .31
5.6.1 General.31
5.6.2 Identity procedures.31
5.6.3 Authentication procedures.32
5.6.4 Location procedures.32
5.6.5 Access rights procedures .32
5.6.6 Key allocation procedure .33
5.6.7 Parameter retrieval procedure.33
5.6.8 Ciphering related procedure.33
5.7 Overview of Link Control Entity (LCE) .33
5.7.1 General.33
5.7.2 Data Link Endpoint Identifier (DLEI) .34
5.7.3 Data link establishment.34
5.7.4 Data link re-establishment .34
5.7.5 Data link release .35
5.7.6 Data link suspend and resume.35
5.7.7 Queuing of messages.35
5.7.8 Request paging.35
ETSI
4 ETSI EN 300 175-5 V1.6.1 (2002-02)
6 Message functional definitions.36
6.1 Overview of message structures.36
6.1.1 Messages.36
6.1.2 Information elements.36
6.2 Message summaries.37
6.2.1 Summary of CC messages .37
6.2.2 Summary of CISS messages .37
6.2.3 Summary of COMS messages .38
6.2.4 Summary of CLMS messages.38
6.2.5 Summary of MM messages .39
6.2.6 Summary of LCE messages.39
6.3 S-FORMAT message functional contents.40
6.3.1 S-FORMAT message overview.40
6.3.2 CC-messages.41
6.3.2.1 {CC-SETUP}.41
6.3.2.2 {CC-INFO}.43
6.3.2.3 {CC-SETUP-ACK}.44
6.3.2.4 {CC-CALL-PROC}.45
6.3.2.5 {CC-ALERTING}.46
6.3.2.6 {CC-CONNECT}.47
6.3.2.7 {CC-CONNECT-ACK}.48
6.3.2.8 {CC-RELEASE}.48
6.3.2.9 {CC-RELEASE-COM}.49
6.3.2.10 {CC-SERVICE-CHANGE}.50
6.3.2.11 {CC-SERVICE-ACCEPT}.50
6.3.2.12 {CC-SERVICE-REJECT}.51
6.3.2.13 {CC-NOTIFY}.51
6.3.2.14 {IWU-INFO}.52
6.3.3 SS-messages (call related and call independent) .53
6.3.3.1 {FACILITY}.53
6.3.3.2 {HOLD}.53
6.3.3.3 {HOLD-ACK}.54
6.3.3.4 {HOLD-REJECT}.54
6.3.3.5 {RETRIEVE}.55
6.3.3.6 {RETRIEVE-ACK}.55
6.3.3.7 {RETRIEVE-REJECT}.56
6.3.3.8 {CISS-REGISTER}.56
6.3.3.9 {CISS-RELEASE-COM}.57
6.3.4 COMS-messages.57
6.3.4.1 {COMS-SETUP}.57
6.3.4.2 {COMS-INFO}.58
6.3.4.3 {COMS-ACK}.58
6.3.4.4 {COMS-CONNECT}.59
6.3.4.5 {COMS-RELEASE}.59
6.3.4.6 {COMS-RELEASE-COM}.60
6.3.4.7 {COMS-NOTIFY}.60
6.3.5 CLMS-message.61
6.3.5.1 {CLMS-VARIABLE}.61
6.3.6 MM-messages.62
6.3.6.1 {ACCESS-RIGHTS-ACCEPT}.62
6.3.6.2 {ACCESS-RIGHTS-REJECT}.62
6.3.6.3 {ACCESS-RIGHTS-REQUEST}.63
6.3.6.4 {ACCESS-RIGHTS-TERMINATE-ACCEPT}.63
6.3.6.5 {ACCESS-RIGHTS-TERMINATE-REJECT}.64
6.3.6.6 {ACCESS-RIGHTS-TERMINATE-REQUEST}.64
6.3.6.7 {AUTHENTICATION-REJECT}.65
6.3.6.8 {AUTHENTICATION-REPLY}.65
6.3.6.9 {AUTHENTICATION-REQUEST}.66
6.3.6.10 {CIPHER-REJECT}.66
6.3.6.11 {CIPHER-REQUEST}.67
6.3.6.12 {CIPHER-SUGGEST}.67
6.3.6.13 {DETACH}.68
ETSI
5 ETSI EN 300 175-5 V1.6.1 (2002-02)
6.3.6.14 {IDENTITY-REPLY}.68
6.3.6.15 {IDENTITY-REQUEST}.69
6.3.6.16 {KEY-ALLOCATE}.69
6.3.6.17 {LOCATE-ACCEPT}.70
6.3.6.18 {LOCATE-REJECT}.70
6.3.6.19 {LOCATE-REQUEST}.71
6.3.6.20 {MM-INFO-ACCEPT}.71
6.3.6.21 {MM-INFO-REJECT}.72
6.3.6.22 {MM-INFO-REQUEST}.72
6.3.6.23 {MM-INFO-SUGGEST}.73
6.3.6.24 {TEMPORARY-IDENTITY-ASSIGN}.73
6.3.6.25 {TEMPORARY-IDENTITY-ASSIGN-ACK}.74
6.3.6.26 {TEMPORARY-IDENTITY-ASSIGN-REJ}.74
6.3.6.27 {MM-IWU}.75
6.3.7 LCE-messages.75
6.3.7.1 {LCE-PAGE-RESPONSE}.75
6.3.7.2 {LCE-PAGE-REJECT}.76
6.4 B-FORMAT message functional contents .76
6.4.1 B-FORMAT message overview .76
6.4.2 {LCE-REQUEST-PAGE}.77
6.4.3 {CLMS-FIXED}.77
7 S-FORMAT message structures.78
7.1 Overview.78
7.2 Protocol Discrimination (PD) element .78
7.3 Transaction Identifier (TI) element .79
7.4 Message type element .80
7.4.1 Messages for CC.80
7.4.2 Messages for SS.80
7.4.3 Messages for COMS.81
7.4.4 Messages for CLMS.81
7.4.5 Messages for MM.81
7.4.6 Messages for LCE.82
7.5 Other information elements.82
7.5.1 Coding rules.82
7.5.2 Extensions of codesets .84
7.5.3 Locking shift procedure.84
7.5.4 Non-locking shift procedure.85
7.5.5 Display and keypad elements.85
7.5.6 Repeated elements.85
7.6 Fixed length information elements.86
7.6.1 Summary.86
7.6.2 Sending complete, delimiter request and use TPUI.86
7.6.3 Repeat indicator.87
7.6.4 Basic service.87
7.6.5 Single display.88
7.6.6 Single keypad.88
7.6.7 Release reason.88
7.6.8 Signal.89
7.6.9 Timer restart.90
7.6.10 Test hook control .91
7.7 Variable length information elements .91
7.7.1 Summary.91
7.7.2 Allocation type.93
7.7.3 Alphanumeric.94
7.7.4 Auth type.95
7.7.5 Call attributes.96
7.7.6 Call identity.99
7.7.7 Called party number.99
7.7.8 Called party subaddress .100
7.7.9 Calling party number.101
7.7.10 Cipher info.102
ETSI
6 ETSI EN 300 175-5 V1.6.1 (2002-02)
7.7.11 Connection attributes.103
7.7.12 Connection identity.105
7.7.13 Duration.106
7.7.14 End-to-end compatibility.107
7.7.15 Facility.110
7.7.16 Feature activate.110
7.7.17 Feature indicate.112
7.7.18 Fixed identity.114
7.7.19 Identity type.115
7.7.20 Info type.116
7.7.21 InterWorking Unit (IWU) attributes .117
7.7.22 IWU packet.122
7.7.23 IWU to IWU .123
7.7.24 Key.125
7.7.25 Location area.125
7.7.26 Multi-display.126
7.7.27 Multi-keypad.127
7.7.28 NetWorK (NWK) assigned identity.127
7.7.29 Network parameter.128
7.7.30 Portable identity.129
7.7.31 Progress indicator.133
7.7.32 RAND.134
7.7.33 Rate parameters.134
7.7.34 Reject reason.135
7.7.35 RES.136
7.7.36 RS.137
7.7.37 Segmented info.137
7.7.38 Service change info.138
7.7.39 Service class.139
7.7.40 Setup capability.140
7.7.41 Terminal capability.141
7.7.42 Transit delay.145
7.7.43 Window size.146
7.7.44 ZAP field.146
7.7.45 Escape to proprietary .147
7.7.46 Model identifier.147
7.7.47 MMS Generic Header.148
7.7.48 MMS Object Header.148
7.7.49 MMS Extended header .149
7.7.50 Time-Date.149
7.7.51 Ext h/o indicator .150
7.7.52 Authentication Reject Parameter.151
8 B-FORMAT message structures .151
8.1 General.151
8.2 LCE request paging messages .152
8.2.1 Short format message.153
8.2.2 Long format message.155
8.3 CLMS-FIXED messages.157
8.3.1 General message structure.157
8.3.2 Message elements.158
8.3.3 Standard message structures .160
8.3.3.1 General.160
8.3.3.2 Messages using 4-bit characters.160
8.3.3.3 Messages using 8-bit characters.160
9 Call Control (CC) procedures.160
9.1 General.160
9.2 Call Control (CC) states .163
9.2.1 States at PT .163
9.2.1.1 State T-00: "NULL".163
9.2.1.2 State T-19: "RELEASE PENDING".163
ETSI
7 ETSI EN 300 175-5 V1.6.1 (2002-02)
9.2.1.3 State T-10: "ACTIVE".163
9.2.1.4 State T-01: "CALL INITIATED" .163
9.2.1.5 State T-02: "OVERLAP SENDING".163
9.2.1.6 State T-03: "CALL PROCEEDING" .163
9.2.1.7 State T-04: "CALL DELIVERED".163
9.2.1.8 State T-06: "CALL PRESENT".163
9.2.1.9 State T-07: "CALL RECEIVED".163
9.2.1.10 State T-08: "CONNECT PENDING" .163
9.2.2 States at FT .164
9.2.2.1 State F-00: "NULL" .164
9.2.2.2 State F-19: "RELEASE PENDING".164
9.2.2.3 State F-10: "ACTIVE" .164
9.2.2.4 State F-01: "CALL-INITIATED" .164
9.2.2.5 State F-02: "OVERLAP SENDING".164
9.2.2.6 State F-03: "CALL PROCEEDING" .164
9.2.2.7 State F-04: "CALL DELIVERED" .164
9.2.2.8 State F-06: "CALL PRESENT" .164
9.2.2.9 State F-07: "CALL RECEIVED".164
9.2.3 Optional states (PT and FT).165
9.2.3.1 States T-22 and F-22: "OVERLAP RECEIVING" .165
9.2.3.2 States T-23 and F-23: "INCOMING CALL PROCEEDING".165
9.3 Call establishment procedures.165
9.3.1 PT initiated call establishment (outgoing call).165
9.3.1.1 Call request.165
9.3.1.2 Call accept or reject.166
9.3.1.3 Selection of lower layer resources .166
9.3.1.4 Connection of U-plane.167
9.3.1.5 Overlap sending.167
9.3.1.6 Call proceeding.168
9.3.1.7 Call confirmation.168
9.3.1.8 Call connection.169
9.3.1.9 Expiry of timer .
...