SIST EN 300 175-5 V1.9.1:2006

• Abstract:

  The present document gives an introduction and overview of the complete Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI). The present document specifies the Network (NWK) layer. The NWK layer is part 5 of the EN 300 175 and layer 3 of the DECT protocol stack.The present document only specifies the C-plane (control plane) of the DECT NWK layer. It contains no specification for the U-plane (user plane) because the U-plane is null for all services at the DECT NWK layer. The C-plane contains all of the internal signalling information, and the NWK layer protocols are grouped into the following families of procedures:; • Call Control (CC);; • Supplementary Services (SS);; • Connection Oriented Message Service (COMS);; • ConnectionLess Message Service (CLMS);; • Mobility Management (MM);; • Link Control Entity (LCE).; The present document uses the layered model principles and terminology as described in ITU-T Recommendation X.200 and ITU-T Recommendation X.210.

• Status: Published
• Publication Date: 28-Feb-2006
• 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-Mar-2006
• Due Date: 01-Mar-2006
• Completion Date: 01-Mar-2006
• Ref Project: ETSI EN 300 175-5 V1.9.1 (2005-09) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 5: Network (NWK) layer

Overview

SIST EN 300 175-5 V1.9.1:2006 focuses on the Network (NWK) layer of the Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI) standard. This document, developed by SIST and aligned with the European EN 300 175-5 standard, specifies the protocols and procedures associated with the NWK layer - which is part 5 of the DECT CI series and corresponds to layer 3 of the DECT protocol stack.

The scope of this standard is strictly on the Control Plane (C-plane) for the NWK layer, covering signaling and internal network procedures, while expressly excluding the User Plane (U-plane), which is null for all DECT NWK services. This layered framework follows the internationally recognized principles described in ITU-T Recommendations X.200 and X.210.

Key Topics

The NWK layer, as standardized in SIST EN 300 175-5 V1.9.1:2006, defines families of procedures crucial for DECT interoperability and functionality, particularly in the realm of internal signaling for cordless telecommunication systems. Major procedure groups include:

• Call Control (CC): Procedures for call establishment, management, and release.
• Supplementary Services (SS): Management of added telephony features, such as call hold and feature activation.
• Connection Oriented Message Service (COMS): Reliable transfer of messages that require a connection-oriented approach.
• Connectionless Message Service (CLMS): For transferring messages that do not need a persistent connection, supporting both fixed and variable lengths.
• Mobility Management (MM): Ensures correct user identification, authentication, location updating, and access rights handling.
• Link Control Entity (LCE): Governs the establishment, re-establishment, suspension, and release of logical data links, as well as message queuing and paging requests.

Applications

The standard's focus on the Network layer is fundamental for robust and interoperable DECT cordless telecommunication systems. Practical applications include:

• Cordless Telephony in residential, business, and industrial settings by ensuring compatibility across DECT devices.
• Wireless Office Communication, providing seamless call handling, feature management, and device mobility.
• Secure and Scalable Connectivity across cordless networks, thanks to detailed procedures for authentication and ciphering.
• Efficient Supplementary Services, enabling advanced telephony features crucial for enterprise and operator deployments.
• Message Service Reliability, offering connection-oriented and connectionless messaging according to application needs.
• Mobility Management, facilitating uninterrupted service as devices move between network zones and base stations.

Manufacturers, network operators, and service vendors rely on compliance with SIST EN 300 175-5 to guarantee interoperability, reliability, and security of DECT solutions within European and international markets.

Related Standards

SIST EN 300 175-5 V1.9.1:2006 is part of a larger suite of DECT Common Interface (CI) standards, each targeting specific protocol layers and network needs:

• EN 300 175-1: Overview and general description of the DECT CI
• EN 300 175-2: Physical Layer (PHL)
• EN 300 175-3: Medium Access Control (MAC)
• EN 300 175-4: Data Link Control (DLC)
• EN 300 175-6: Identity Module procedures
• ITU-T X.200/X.210: Provides the general layered model framework adopted by this standard

Organizations seeking to implement or certify cordless digital telecommunication devices using DECT technology should reference the entire EN 300 175 family for consistent and standards-compliant deployments.

Keywords: DECT, Network layer, control plane, cordless telecommunication, call control, mobility management, supplementary services, COMS, CLMS, LCE, interoperability, SIST, EN 300 175, European standards, wireless communication

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 5: Network (NWK) layer35.100.30Omrežni slojNetwork layer33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:EN 300 175-5 Version 1.9.1SIST EN 300 175-5 V1.9.1:2006en01-marec-2006SIST EN 300 175-5 V1.9.1:2006SLOVENSKI
STANDARD
ETSI ETSI EN 300 175-5 V1.9.1 (2005-09) 2
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ETSI ETSI EN 300 175-5 V1.9.1 (2005-09) 3
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.24 5 Overview of procedures.26 5.1 General.26 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.27 5.2.3 Call connect.27 5.2.4 Call information.27 5.2.5 Service change.28 5.2.6 Call release.28 5.3 Overview of Supplementary Services (SS).28 5.3.1 General.28 5.3.2 Keypad protocol.29 5.3.3 Feature key management protocol.29 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.30 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.31 5.5 Overview of ConnectionLess Message Service (CLMS).31 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.32 5.6.3 Authentication procedures.32 5.6.4 Location procedures.33 5.6.5 Access rights procedures.33 5.6.6 Key allocation procedure.33 5.6.7 Parameter retrieval procedure.33 5.6.8 Ciphering related procedure.34 5.6.9 External protocol information procedure.34 5.7 Overview of Link Control Entity (LCE).34 5.7.1 General.34 5.7.2 Data Link Endpoint Identifier (DLEI).34 5.7.3 Data link establishment.35 5.7.4 Data link re-establishment.35 5.7.5 Data link release.35 5.7.6 Data link suspend and resume.35 5.7.7 Queuing of messages.36 SIST EN 300 175-5 V1.9.1:2006

ETSI ETSI EN 300 175-5 V1.9.1 (2005-09) 4
5.7.8 Request paging.36 6 Message functional definitions.36 6.1 Overview of message structures.36 6.1.1 Messages.36 6.1.2 Information elements.37 6.2 Message summaries.37 6.2.1 Summary of CC messages.37 6.2.2 Summary of CISS messages.38 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.40 6.3.2.1 {CC-SETUP}.40 6.3.2.2 {CC-INFO}.42 6.3.2.3 {CC-SETUP-ACK}.43 6.3.2.4 {CC-CALL-PROC}.44 6.3.2.5 {CC-ALERTING}.45 6.3.2.6 {CC-CONNECT}.46 6.3.2.7 {CC-CONNECT-ACK}.47 6.3.2.8 {CC-RELEASE}.47 6.3.2.9 {CC-RELEASE-COM}.48 6.3.2.10 {CC-SERVICE-CHANGE}.49 6.3.2.11 {CC-SERVICE-ACCEPT}.50 6.3.2.12 {CC-SERVICE-REJECT}.50 6.3.2.13 {CC-NOTIFY}.51 6.3.2.14 {IWU-INFO}.51 6.3.3 SS-messages (call related and call independent).52 6.3.3.1 {FACILITY}.52 6.3.3.2 {HOLD}.52 6.3.3.3 {HOLD-ACK}.53 6.3.3.4 {HOLD-REJECT}.53 6.3.3.5 {RETRIEVE}.53 6.3.3.6 {RETRIEVE-ACK}.54 6.3.3.7 {RETRIEVE-REJECT}.54 6.3.3.8 {CISS-REGISTER}.55 6.3.3.9 {CISS-RELEASE-COM}.55 6.3.4 COMS-messages.56 6.3.4.1 {COMS-SETUP}.56 6.3.4.2 {COMS-INFO}.56 6.3.4.3 {COMS-ACK}.57 6.3.4.4 {COMS-CONNECT}.57 6.3.4.5 {COMS-RELEASE}.58 6.3.4.6 {COMS-RELEASE-COM}.58 6.3.4.7 {COMS-NOTIFY}.59 6.3.5 CLMS-message.59 6.3.5.1 {CLMS-VARIABLE}.59 6.3.6 MM-messages.60 6.3.6.1 {ACCESS-RIGHTS-ACCEPT}.60 6.3.6.2 {ACCESS-RIGHTS-REJECT}.60 6.3.6.3 {ACCESS-RIGHTS-REQUEST}.61 6.3.6.4 {ACCESS-RIGHTS-TERMINATE-ACCEPT}.61 6.3.6.5 {ACCESS-RIGHTS-TERMINATE-REJECT}.62 6.3.6.6 {ACCESS-RIGHTS-TERMINATE-REQUEST}.62 6.3.6.7 {AUTHENTICATION-REJECT}.63 6.3.6.8 {AUTHENTICATION-REPLY}.63 6.3.6.9 {AUTHENTICATION-REQUEST}.64 6.3.6.10 {CIPHER-REJECT}.64 6.3.6.11 {CIPHER-REQUEST}.65 SIST EN 300 175-5 V1.9.1:2006

ETSI ETSI EN 300 175-5 V1.9.1 (2005-09) 5
6.3.6.12 {CIPHER-SUGGEST}.65 6.3.6.13 {DETACH}.66 6.3.6.14 {IDENTITY-REPLY}.67 6.3.6.15 {IDENTITY-REQUEST}.67 6.3.6.16 {KEY-ALLOCATE}.68 6.3.6.17 {LOCATE-ACCEPT}.68 6.3.6.18 {LOCATE-REJECT}.69 6.3.6.19 {LOCATE-REQUEST}.69 6.3.6.20 {MM-INFO-ACCEPT}.70 6.3.6.21 {MM-INFO-REJECT}.70 6.3.6.22 {MM-INFO-REQUEST}.71 6.3.6.23 {MM-INFO-SUGGEST}.72 6.3.6.24 {TEMPORARY-IDENTITY-ASSIGN}.72 6.3.6.25 {TEMPORARY-IDENTITY-ASSIGN-ACK}.73 6.3.6.26 {TEMPORARY-IDENTITY-ASSIGN-REJ}.73 6.3.6.27 {MM-IWU}.74 6.3.6.28 {MM-NOTIFY}.74 6.3.7 LCE-messages.75 6.3.7.1 {LCE-PAGE-RESPONSE}.75 6.3.7.2 {LCE-PAGE-REJECT}.75 6.4 B-FORMAT message functional contents.76 6.4.1 B-FORMAT message overview.76 6.4.2 {LCE-REQUEST-PAGE}.76 6.4.3 {CLMS-FIXED}.77 7 S-FORMAT message structures.77 7.1 Overview.77 7.2 Protocol Discrimination (PD) element.78 7.3 Transaction Identifier (TI) element.78 7.4 Message type element.79 7.4.1 Messages for CC.80 7.4.2 Messages for SS.80 7.4.3 Messages for COMS.80 7.4.4 Messages for CLMS.81 7.4.5 Messages for MM.81 7.4.6 Messages for LCE.81 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 SIST EN 300 175-5 V1.9.1:2006

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7.7.8 Called party subaddress.100 7.7.9 Calling party number.101 7.7.10 Cipher info.102 7.7.11 Connection attributes.103 7.7.12 Connection identity.105 7.7.13 Duration.107 7.7.14 End-to-end compatibility.107 7.7.15 Facility.111 7.7.16 Feature activate.111 7.7.17 Feature indicate.113 7.7.18 Fixed identity.115 7.7.19 Identity type.116 7.7.20 Info type.117 7.7.21 InterWorking Unit (IWU) attributes.118 7.7.22 IWU packet.123 7.7.23 IWU to IWU.124 7.7.24 Key.126 7.7.25 Location area.126 7.7.26 Multi-display.127 7.7.27 Multi-keypad.128 7.7.28 NetWorK (NWK) assigned identity.128 7.7.29 Network parameter.129 7.7.30 Portable identity.130 7.7.31 Progress indicator.134 7.7.32 RAND.135 7.7.33 Rate parameters.135 7.7.34 Reject reason.136 7.7.35 RES.137 7.7.36 RS.138 7.7.37 Segmented info.138 7.7.38 Service change info.139 7.7.39 Service class.140 7.7.40 Setup capability.141 7.7.41 Terminal capability.142 7.7.42 Transit delay.146 7.7.43 Window size.147 7.7.44 ZAP field.147 7.7.45 Escape to proprietary.148 7.7.46 Model identifier.148 7.7.47 MMS Generic Header.149 7.7.48 MMS Object Header.149 7.7.49 MMS Extended header.150 7.7.50 Time-Date.150 7.7.51 Ext h/o indicator.151 7.7.52 Authentication Reject Parameter.152 8 B-FORMAT message structures.152 8.1 General.152 8.2 LCE request paging messages.153 8.2.1 Short format message.154 8.2.2 Long format message.156 8.3 CLMS-FIXED messages.158 8.3.1 General message structure.158 8.3.2 Message elements.159 8.3.3 Standard message structures.160 8.3.3.1 General.160 8.3.3.2 Messages using 4-bit characters.161 8.3.3.3 Messages using 8-bit characters.161 9 Call Control (CC) procedures.161 9.1 General.161 9.2 Call Control (CC) states.164 SIST EN 300 175-5 V1.9.1:2006

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9.2.1 States at PT.164 9.2.1.1 State T-00: "NULL".164 9.2.1.2 State T-19: "RELEASE PENDING".164 9.2.1.3 State T-10: "ACTIVE".164 9.2.1.4 State T-01: "CALL INITIATED".164 9.2.1.5 State T-02: "OVERLAP SENDING".164 9.2.1.6 State T-03: "CALL PROCEEDING".164 9.2.1.7 State T-04: "CALL DELIVERED".164 9.2.1.8 State T-06: "CALL PRESENT".164 9.2.1.9 State T-07: "CALL RECEIVED".164 9.2.1.10 State T-08: "CONNECT PENDING".164 9.2.2 States at FT.165 9.2.2.1 State F-00: "NULL".165 9.2.2.2 State F-19: "RELEASE PENDING".165 9.2.2.3 State F-10: "ACTIVE".165 9.2.2.4 State F-01: "CALL-INITIATED".165 9.2.2.5 State F-02: "OVERLAP SENDING".165 9.2.2.6 State F-03: "CALL PROCEEDING".165 9.2.2.7 State F-04: "CALL DELIVERED".165 9.2.2.8 State F-06: "CALL PRESENT".165 9.2.2.9 State F-07: "CALL RECEIVED".165 9.2.3 Optional states (PT and FT).166 9.2.3.1 States T-22 and F-22: "OVERLAP RECEIVING".166 9.2.3.2 States T-23 and F-23: "INCOMING CALL PROCEEDING".166 9.3 Call establishment procedures.166 9.3.1 PT initiated call establishment (outgoing call).166 9.3.1.1 Call request.166 9.3.1.2 Call accept or reject.167 9.3.1.3 Selection of lower layer resources.167 9.3.1.4 Connection of U-plane.168 9.3.1.5 Overlap sending.168 9.3.1.6 Call proceeding.169 9.3.1.7 Call confirmation.169 9.3.1.8 Call connection.170 9.3.1.9 Expiry of timer .170 9.3.2 FT initiated call establishment (incoming call).170 9.3.2.1 Call request.
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