SIST EN 300 175-4 V1.6.1:2003
(Main)Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
- Abstract
Maintenance update.
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
SIST EN 300 175-4 V1.6.1:2003 is the Slovenian adoption of ETSI EN 300 175-4 V1.6.1 for Digital Enhanced Cordless Telecommunications (DECT). It specifies the DECT Common Interface (CI) Data Link Control (DLC) layer, including control-plane and user-plane procedures, frame formats, primitives, and management functions. Engineers and test teams use it to implement and verify the DLC behavior between DECT radio terminations and the Network (NWK) layer.
What does SIST EN 300 175-4 V1.6.1:2003 specify?
SIST EN 300 175-4 V1.6.1:2003 specifies Part 4 of the DECT CI standard and identifies the DLC layer as layer 2b of the DECT protocol stack. The document is organized into clauses for scope, references, definitions, the DLC overview, C-plane services, C-plane frame structures and procedures, primitives, management procedures, and U-plane service characteristics.
The standard splits DLC operation into two planes:
- C-plane for DECT signaling and reliable transfer of Network layer messages.
- U-plane for end-to-end user information and service-dependent data links.
This structure matters in practice because the C-plane and U-plane use different frame types, procedures, and service models, so implementation choices depend on whether the product carries signaling, broadcast information, or user traffic.
What are the key requirements of SIST EN 300 175-4 V1.6.1:2003?
SIST EN 300 175-4 V1.6.1:2003 defines the DLC behavior through detailed link classes, field codings, primitives, and service procedures.
C-plane data link service - Clause 5 defines Class U, Class A, and Class B operation. Class U is unacknowledged, Class A is single-frame acknowledged, and Class B is multiple-frame acknowledged. In practice, implementers must choose the link class to match the reliability and traffic pattern needed by the NWK service.
Frame structures - Clause 6 defines the C-plane data link frame structure and the broadcast frame structure. Broadcast service uses standard 3-octet and 5-octet frames, plus extended frame formats up to 30 octets. This matters for message sizing and for matching the MAC layer transmission order.
Address and control fields - Clause 7 defines the address field, including RES, C/R, SAPI, NLF, LLN, DLI, and DLEI, as well as the control field and sequence-related parameters. This is the part that lets the receiver identify the service, the link instance, and the frame role correctly.
Commands and responses - Clause 7 also defines I, RR, RNR, REJ, SABM, DM, UI, DISC, and UA. These frames drive acknowledged transfer, busy reporting, link establishment, release, and unacknowledged transfer, so protocol software must generate and interpret them exactly as assigned.
Primitives - Clause 8 defines layer service primitives such as DL_ESTABLISH, DL_RELEASE, DL_DATA, DL_UNIT_DATA, DL_SUSPEND, DL_RESUME, DL_BROADCAST, and DL_EXPEDITED, plus interworking-unit primitives. These primitives are the service interface between layers and are the hooks used by software APIs and conformance tests.
Management - Clause 10 covers LLME coordination, MAC connection management, DLC C-plane and U-plane management, connection handover, and ciphering management. This is where routing, connection opening and closing, and handover behavior are controlled.
U-plane service families - Clause 11 defines services such as TRUP, FREL, FSWI, FEC, BRAT, SRAT, ESC, LU7 64 kbit/s data bearer service, LU8, LU9 RAVE, LU10 EFREL, and LU11. These services cover unprotected low-delay traffic, protected frame relay, rate adaption, error correction, and implementation-specific escape use.
What terms does SIST EN 300 175-4 V1.6.1:2003 define?
- Digital Enhanced Cordless Telecommunications (DECT) - The cordless telecommunications family for which this common interface is defined.
- Common Interface (CI) - The standardized DECT interface across protocol layers and entities.
- Data Link Control (DLC) layer - The layer that carries C-plane and U-plane traffic between MAC and NWK.
- Control plane (C-plane) - The signaling plane used for reliable transfer of NWK messages and broadcast data.
- User plane (U-plane) - The plane used for user information and service-specific data links.
- Link Access Protocol for the C-plane (LAPC) - The C-plane link protocol that provides segmentation, error handling, flow control, and suspend/resume.
- Lower Layer Management Entity (LLME) - The management function that coordinates routing and MAC connection control.
- Logical Link Number (LLN) - The identifier that distinguishes a LAPC entity within a link instance.
Who uses SIST EN 300 175-4 V1.6.1:2003?
SIST EN 300 175-4 V1.6.1:2003 is used by DECT equipment designers, protocol developers, interoperability engineers, and conformance test laboratories. It is also relevant to quality managers and purchasers who need to check whether a product implements the DECT DLC layer correctly.
Typical tasks include implementing C-plane signaling, selecting and managing U-plane services, coding frame formats and primitives, handling link establishment and release, and verifying broadcast, acknowledged, and unacknowledged procedures in Fixed radio Termination (FT) and Portable radio Termination (PT) equipment.
What changed in SIST EN 300 175-4 V1.6.1:2003 from the previous edition?
SIST EN 300 175-4 V1.6.1:2003 is identified as a maintenance update.
Which standards are used with SIST EN 300 175-4 V1.6.1:2003?
SIST EN 300 175-4 V1.6.1:2003 references the following companion standards and documents:
- ETSI EN 300 175-1 - DECT overview and shared definitions used throughout the series.
- ETSI EN 300 175-2 - DECT Physical Layer (PHL), used for the radio interface below DLC.
- ETSI EN 300 175-3 - DECT Medium Access Control (MAC) layer, used for frame transmission and ordering.
- ETSI EN 300 175-5 - DECT Network (NWK) layer, which defines how DLC services carry network messages.
- ETSI EN 300 175-8 - Speech coding and transmission support for DECT speech-related use.
- ITU-T Q.920 / Q.921, V.42, V.110, X.200, X.210 - Referenced for link-layer concepts, error correction, and OSI service conventions.
- ISO/IEC 8073 - Used as the basis for the underlying checksum approach.
- ETSI TR 101 178 and ETSI ETR 043 - Background guides to DECT standardization and services requirements.
What does the SIST EN 300 175-4 V1.6.1:2003 document contain?
SIST EN 300 175-4 V1.6.1:2003 contains detailed field formats, state variables, command and response definitions, primitive parameter tables, and management procedures. It also includes service-specific descriptions and procedures for LU7, LU9, LU10, and LU11, such as buffering, segmentation, reassembly, ARQ/FEC handling, alignment signal management, and rate adaptation.
For testing and implementation work, the document provides the procedural rules that determine how frames are built, how they are acknowledged, how errors are handled, and how service data is handed between the DLC layer, MAC layer, and NWK layer.
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Frequently Asked Questions
SIST EN 300 175-4 V1.6.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer". This standard covers: Maintenance update.
Maintenance update.
SIST EN 300 175-4 V1.6.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT); 35.100.20 - Data link layer. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 175-4 V1.6.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer35.100.20Podatkovni povezovalni slojData link layer33.070.30'(&7Digital Enhanced Cordless Telecommunications (DECT)ICS:Ta slovenski standard je istoveten z:EN 300 175-4 Version 1.6.1SIST EN 300 175-4 V1.6.1:2003en01-december-2003SIST EN 300 175-4 V1.6.1:2003SLOVENSKI
STANDARD
ETSI ETSI EN 300 175-4 V1.6.1 (2002-02) 2
Reference REN/DECT-000194-4 Keywords DECT, radio ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, send your comment to: editor@etsi.fr 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 2002. All rights reserved.
ETSI ETSI EN 300 175-4 V1.6.1 (2002-02) 3 Contents
Intellectual Property Rights.11 Foreword.11 1 Scope.12 2 References.12 3 Definitions, symbols and abbreviations.13 3.1 Definitions.13 3.2 Symbols and abbreviations.14 4 Data Link Control (DLC) layer overview.15 4.1 General.15 4.2 C-Plane services.16 4.3 U-plane services.16 4.4 Lower Layer Management Entity (LLME).19 5 C-plane service characteristics.19 5.1 Data link service (LAPC+Lc).19 5.1.1 General.19 5.1.2 LAPC types of operation.20 5.1.3 Establishment of information transfer modes.20 5.1.3.1 Data Link Identifier (DLI).20 5.1.3.2 LAPC states.20 5.2 Broadcast service (Lb).21 6 Frame structures for C-plane services.22 6.1 Data link service frame structure.22 6.1.1 General frame structure.22 6.1.2 Lc frame delimiting and transparency.23 6.1.3 Transmission order.23 6.1.4 Routing to logical channels.23 6.1.4.1 CF/CLF logical channel.23 6.1.4.2 CS/CLS logical channel.24 6.1.5 Invalid frames.24 6.2 Broadcast service frame structure.25 6.2.1 Standard frame structure.25 6.2.2 Extended frame structure.25 7 Elements of procedures and formats of fields for C-plane peer-to-peer communication.26 7.1 General.26 7.2 Address field formats.26 7.3 Address field parameters.26 7.3.1 REServed bit (RES).26 7.3.2 Command Response (C/R) bit.26 7.3.3 SAPI field.27 7.3.4 New Link Flag (NLF) bit.27 7.3.5 LLN-field.27 7.3.6 Data Link Identifiers (DLI).27 7.4 Control field formats.28 7.5 Control field parameters.28 7.5.1 Poll/Final (P/F) bit.28 7.5.2 Multiple frame operation variables and sequence numbers.29 7.5.2.1 Modulus.29 7.5.2.2 Send state Variable V(S).29 7.5.2.3 Acknowledge state Variable V(A).29 7.5.2.4 Send sequence Number N(S).29 SIST EN 300 175-4 V1.6.1:2003
ETSI ETSI EN 300 175-4 V1.6.1 (2002-02) 4 7.5.2.5 Receive state Variable V(R).29 7.5.2.6 Receive sequence Number N(R).29 7.5.3 Unacknowledged operation variables and sequence numbers.29 7.5.4 Supervisory and Unnumbered function bits S and U.30 7.6 Length indicator field format.30 7.7 Length indicator field parameters.30 7.7.1 Length indicator field extension bit; N.30 7.7.2 More data bit; M.30 7.7.3 Length parameter; LI.31 7.7.4 Extended length parameter; LJJ.31 7.7.5 Reserved bit; RES.31 7.8 Fill field format.31 7.9 Checksum field format.32 7.10 Checksum field parameters.32 7.11 Commands and responses.33 7.11.1 Information (I) command.33 7.11.2 Receive Ready (RR) command/response.34 7.11.3 Receive Not Ready (RNR) command/response.34 7.11.4 REJect (REJ) command/response.34 7.11.5 Set Asynchronous Balanced Mode (SABM) command.34 7.11.6 Disconnect Mode (DM) response.35 7.11.7 Unnumbered Information (UI) command.35 7.11.8 DISConnect (DISC) command.35 7.11.9 Unnumbered ACK (UA) response.35 8 Primitives.35 8.1 Primitive types.35 8.2 Primitives to the MAC layer (lower layer).36 8.3 Primitives to the NWK layer (higher layer).36 8.3.1 Parameter definitions.36 8.3.2 S-SAP primitives.37 8.3.2.1 DL_ESTABLISH primitive.37 8.3.2.2 DL_RELEASE primitive.38 8.3.2.3 DL_DATA primitive.38 8.3.2.4 DL_UNIT_DATA primitive.38 8.3.2.5 DL_SUSPEND primitive.38 8.3.2.6 DL_RESUME primitive.39 8.3.2.7 DL_ENC_KEY primitive.39 8.3.2.8 DL_ENCRYPT primitive.39 8.3.2.9 DL_SERVICE_MOD primitive.39 8.3.3 B-SAP primitives.40 8.3.3.1 DL_BROADCAST primitive.40 8.3.3.2 DL_EXPEDITED primitive.40 8.4 Primitives to the interworking unit.40 8.4.1 Parameter definitions.40 8.4.2 LUX-SAP primitives.41 8.4.2.1 DL_U_DATA primitive.41 8.4.2.2 DL_U_UNIT_DATA primitive.41 8.4.2.3 DL_U_ERROR primitive.41 9 C-plane peer-to-peer procedures.42 9.1 General.42 9.2 Point to point acknowledged operation.42 9.2.1 Procedure for the use of the P/F bit.42 9.2.1.1 Class A acknowledged information transfer.42 9.2.1.2 Class B acknowledged information transfer.43 9.2.2 Use of LLN.43 9.2.2.1 Class A operation.43 9.2.2.2 Class B operation.43 9.2.3 Link establishment and information transfer in class A operation.43 9.2.3.1 Establishing class A operation.43 9.2.3.2 Class A acknowledged information transfer.44 SIST EN 300 175-4 V1.6.1:2003
ETSI ETSI EN 300 175-4 V1.6.1 (2002-02) 5 9.2.3.3 Transmission of class A I-frames.44 9.2.3.4 Reception of class A I-frames.45 9.2.3.5 Receiving acknowledgements.45 9.2.3.6 Waiting for acknowledgement.45 9.2.3.7 Release of class A operation.46 9.2.3.8 Re-establishment of class A operation.46 9.2.4 Establishing class B multiple frame operation.46 9.2.4.1 Overview.46 9.2.4.2 Class B multiple frame establishment procedures.47 9.2.4.3 Class B LLN assignment procedures.48 9.2.4.3.1 PT establishment.48 9.2.4.3.2 FT establishment.49 9.2.5 Link maintenance and information transfer in class B multiple frame operation.49 9.2.5.1 Transmitting I-frames.49 9.2.5.2 Receiving I-frames.50 9.2.5.2.1 P bit set to 1.50 9.2.5.2.2 P bit set to 0.50 9.2.5.3 Sending and receiving acknowledgements.50 9.2.5.3.1 Sending acknowledgements.50 9.2.5.3.2 Receiving acknowledgements.50 9.2.5.4 Receiving REJ-frames.51 9.2.5.5 Receiving RNR-frames.52 9.2.5.6 LAPC own receiver busy condition.53 9.2.5.7 Waiting acknowledgement.53 9.2.5.8 Appropriate supervisory frame.54 9.2.6 Release of class B multiple frame operation.54 9.2.7 Link suspension and resumption.55 9.2.7.1 Link suspension.55 9.2.7.1.1 Class B acknowledged suspend.55 9.2.7.1.2 Unacknowledged suspend.56 9.2.7.1.2.1 Class A.56 9.2.7.1.2.2 Class B.56 9.2.7.1.2.3 Class U.56 9.2.7.2 Class B link resumption.56 9.2.7.3 Connection handover.57 9.2.7.3.1 Class A connection handover.59 9.2.7.3.2 Class B connection handover.59 9.2.7.3.3 Expiry of connection handover timer.60 9.2.8 Re-establishment of class B multi-frame operation.60 9.2.8.1 Criteria for re-establishment.60 9.2.8.2 Procedure.61 9.2.9 Exception handling.61 9.2.9.1 General.61 9.2.9.2 Class B exception condition reporting and recovery.61 9.2.9.2.1 N(S) sequence error.62 9.2.9.2.2 N(R) sequence error.62 9.2.9.2.3 Timer recovery condition.62 9.2.9.2.4 Collision of identical transmitted and received commands.62 9.3 Unacknowledged operation.62 9.3.1 Use of LLN for unacknowledged information transfer.62 9.3.2 Class U link establishment.63 9.3.3 Unacknowledged information transfer.63 9.3.3.1 Transmission of unacknowledged information.63 9.3.3.2 Reception of unacknowledged information.63 9.3.4 Unacknowledged release.63 9.4 Broadcast operation.63 9.4.1 Normal operation.63 9.4.1.1 Procedure in the Fixed radio Termination (FT).63 9.4.1.2 Procedure in the Portable radio Termination (PT).64 9.4.2 Expedited operation.64 9.4.2.1 Procedure in the Fixed radio Termination (FT).64 9.4.2.2 Procedure in the Portable radio Termination (PT).64 SIST EN 300 175-4 V1.6.1:2003
ETSI ETSI EN 300 175-4 V1.6.1 (2002-02) 6 9.5 MAC layer interfaces.64 9.5.1 MC-SAP.64 9.5.1.1 C-plane overview.64 9.5.1.2 C-plane service data procedures.65 9.5.1.3 U-plane service data.65 9.5.2 MB-SAP.66 9.5.2.1 C-plane service data procedures.66 9.5.2.2 U-plane service data.66 9.5.3 MA-SAP.66 9.5.3.1 Overview.66 9.5.3.2 Service data procedures.67 10 Management procedures.67 10.1 Lower Layer Management Entity (LLME).67 10.2 MAC connection management.67 10.2.1 MAC connection set-up.67 10.2.2 MAC connection release.68 10.2.3 MAC connection modification.68 10.2.4 MAC connection identifiers.69 10.2.4.1 Overview.69 10.2.4.2 Advanced MAC Connection Identifiers (AMCI).69 10.2.4.3 Basic MAC Connection Identifiers (BMCI).70 10.2.4.4 MAC Connection Endpoint Identifier (MCEI).70 10.2.5 Selection of logical channel (CS or CF).70 10.3 DLC C-plane (LAPC) management.70 10.3.1 Provision of link signature.71 10.3.2 Routing of connection oriented links.71 10.3.3 Routing of connectionless links.71 10.4 DLC U-plane (LUX) management.71 10.4.1 U-plane establishment.71 10.4.2 U-plane release.72 10.4.3 U-plane suspend and resume.72 10.5 Connection handover management.72 10.6 Ciphering management.73 10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure.73 10.6.1.1 Providing a key to the MAC layer.73 10.6.1.2 Starting and stopping the ciphering.73 10.6.1.3 Connection handover.73 10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM procedure.73 11 U-plane service characteristics.74 11.1 General.74 11.2 LU1 TRansparent UnProtected service (TRUP).74 11.3 LU2 Frame RELay service (FREL).75 11.3.1 General.75 11.3.2 Checksum operation.76 11.3.3 Segmentation and transmission class.76 11.3.4 Data transmission.77 11.3.4.1 Send side procedure.77 11.3.4.2 Receive side procedure.77 11.4 LU3 Frame SWItching service (FSWI).77 11.5 LU4 Forward Error Correction service (FEC).78 11.6 LU5 Basic Rate Adaption service (BRAT).78 11.6.1 Overview.78 11.6.2 Protected service operation.79 11.6.2.1 General.79 11.6.2.2 Data buffering and initial rate adaptation.80 11.6.2.3 Multi-channel set multiplexing.81 11.6.2.4 Segmentation of Multiplexed Data Units (MDU).82 11.6.2.5 Frame sequencing and addition of control and fill octets.83 11.6.2.6 Frame transmission.84 SIST EN 300 175-4 V1.6.1:2003
ETSI ETSI EN 300 175-4 V1.6.1 (2002-02) 7 11.6.3 Unprotected service operation.84 11.6.3.1 General.84 11.6.3.2 Data buffering and initial rate adaption.85 11.6.3.3 Multi-channel set multiplexing.85 11.6.3.4 Segmentation of MDUs.86 11.6.3.5 Frame transmission.86 11.7 LU6 Secondary Rate AdapTion (SRAT) service.87 11.7.1 General.87 11.8 LU16 ESCape Service (ESC).88 11.8.1 General.88 11.9 LU7 64 kbit/s data bearer service.88 11.9.1 General.88 11.9.2 Physical layer service.88 11.9.3 MAC layer service.89 11.9.4 DLC layer service.89 11.9.4.1 Architectural model.89 11.9.4.1.1 Transmit (Tx) frame buffering.89 11.9.4.1.2 Receive (Rx) frame buffering.89 11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC).89 11.9.4.2.1 Control field.91 11.9.4.2.1.1 Format control parameter coding.91 11.9.4.2.1.2 Offset variable V(O).92 11.9.4.2.1.3 Time variables Vn(T).92 11.9.4.2.1.4 Offset number N(O).92 11.9.4.2.1.5 Send state variable V(S).92 11.9.4.2.1.6 Acknowledge state variable V(A).93 11.9.4.2.1.7 Send sequence number N(S).93 11.9.4.2.1.8 Receive state variable V(R).93 11.9.4.2.1.9 Receive sequence number N(R).93 11.9.4.2.2 Information field.93 11.9.4.2.3 ARQ checksum.93 11.9.4.3 Procedures for normal operation.94 11.9.4.3.1 Establishment and synchronization procedures.94 11.9.4.3.2 Active phase.96 11.9.4.3.2.1 Transmitting frames (first time transmission).96 11.9.4.3.2.2 Re-transmitting frames.96 11.9.4.3.2.3 Receiving frames.96 11.9.4.3.2.4 Sending acknowledgements.97 11.9.4.3.2.5 Receiving acknowledgements.97 11.9.4.3.3 Release.97 11.9.4.4 Exceptional procedures.97 11.9.4.4.1 Invalid frame condition.97 11.9.4.4.2 Establishment.98 11.9.4.4.3 Transmitting frames.98 11.9.4.4.4 Receiving frames.98 11.9.4.4.5 Sending acknowledgements.98 11.9.4.4.6 Forwarding of received data.98 11.9
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