SIST EN 300 175-4 V2.2.1:2009

• Abstract:

  The present document is one of the parts of the specification of the Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI). The present document specifies the Data Link Control (DLC) layer. The DLC layer is part 4 of the DECT CI standard and layer 2b of the DECT protocol stack. Two planes of operation are specified for this DLC (sub)layer. These planes are called the Control plane (C-plane) and the User plane (U-plane). The C-plane is mostly concerned with the DECT signalling aspects. It provides a reliable point-to-point service that uses a link access protocol to offer error protected transmission of Network (NWK) layer messages. The C-plane also provides a separate point-to-multipoint (broadcast) service (Lb). The U-plane is only concerned with end-to-end user information. This plane contains most of the application dependent procedures of DECT. Several alternative services (both circuit-mode and packet-mode) are defined as a family of independent entities. Each service provides one or more point-to-point U-plane data links, where the detailed characteristics of those links are determined by the particular needs of each service. The defined services cover a wide range of performance, from "unprotected with low delay" for speech applications to "highly protected with variable delay", for local area network applications. NOTE: The performance of the DLC services need not be tight to any particular application. For example the "unprotected with low delay" service could also be used for data applications, e.g. if some data protection is provided outside the DECT protocol.; The present document uses the layered model principles and terminology as described in ITU-T Recommendation X.200 [14] and ITU-T Recommendation X.210 [15]. The present document includes New Generation DECT, a further development of the DECT standard introducing wideband speech, improved data services, new slot types and other technical enhancements.

• Status: Published
• Publication Date: 20-Nov-2008
• ICS: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT)
• ICS: 35.100.20 - Data link layer
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 14-Nov-2008
• Due Date: 19-Jan-2009
• Completion Date: 21-Nov-2008
• Ref Project: ETSI EN 300 175-4 V2.2.1 (2008-11) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer

SIST EN 300 175-4 V2.2.1:2009 is the SIST version of the DECT Common Interface standard, Part 4. It specifies the Data Link Control (DLC) layer, which is DECT layer 2b and carries Control plane (C-plane) signalling and User plane (U-plane) traffic between the MAC layer and the Network (NWK) layer. The document is for people implementing, integrating, or checking DECT equipment that uses these link-layer services.

What does SIST EN 300 175-4 V2.2.1:2009 specify?

SIST EN 300 175-4 V2.2.1:2009 specifies the DECT DLC layer and how it is used in both the C-plane and the U-plane. It gives the link formats, procedures, primitives, and management functions needed for DECT signalling and user data transfer.

The document is organized around the DLC overview, C-plane services, C-plane frame structures, field coding and procedures, primitives, management procedures, U-plane service characteristics, and U-plane frame structures. It also uses the layered-model terms from ITU-T Recommendation X.200 and X.210, and it includes New Generation DECT features such as wideband speech, improved data services, and new slot types.

What are the key requirements of SIST EN 300 175-4 V2.2.1:2009?

The DLC layer is split into a C-plane for signalling and a U-plane for end-to-end user information. In practice, this means implementers must treat signalling links and user-data links as different service families, with different reliability and framing behavior.

The C-plane provides a reliable point-to-point service for Network (NWK) layer messages and a separate broadcast service called Lb. Clause 5 and clause 6 define the LAPC service, the standard and extended frame structures, frame delimiting, transparency, routing to logical channels, and invalid-frame handling. Invalid frames are discarded without notifying the sender, so interoperability depends on correct coding and checksum handling.

Clause 7 defines the address and control fields for peer-to-peer C-plane communication. The key identifiers are the SAPI, NLF, LLN, and DLI fields, and the LLN values distinguish class U, class A, and class B operation. In practice, this is what lets both ends of a link agree on which service and which link instance a frame belongs to.

Clause 7.11 defines the C-plane command and response set: I, RR, RNR, REJ, SABM, DM, UI, DISC, and UA. Clause 9 then turns those codes into link procedures for acknowledged and unacknowledged operation, broadcast operation, handover, suspension and resumption, exception handling, and re-establishment. This is the operational core for link-state machines and conformance behavior.

Clause 8 defines the primitive types between layers: req, cfm, ind, and res. It also lists the DL_ESTABLISH, DL_RELEASE, DL_DATA, DL_UNIT_DATA, DL_SUSPEND, DL_RESUME, DL_ENC_KEY, DL_ENCRYPT, DL_SERVICE_MOD, DL_BROADCAST, DL_EXPEDITED, DL_U_DATA, DL_U_UNIT_DATA, and DL_U_ERROR primitives. These are the service interface points that software must expose internally between DLC, MAC, NWK, and the interworking unit.

Clause 10 covers management procedures. It includes LLME behavior, MAC connection setup, release and modification, MAC connection identifiers such as AMCI, BMCI, and MCEI, channel selection, ciphering management, and broadband data link management. This matters when a product must establish, change, or secure links at runtime.

Clause 11 and clause 12 define the U-plane service families and frame structures. The standard names services such as LU1 TRUP, LU2 FREL, LU3 FSWI, LU4 FEC, LU5 BRAT, LU7, LU10 EFREL, LU11, LU12 UNF, and LU16 ESC, and it explains which frame type and transmission behavior each service uses.

What terms does SIST EN 300 175-4 V2.2.1:2009 define?

• Data Link Control (DLC) - The DECT layer that provides link services between MAC and NWK.
• Control plane (C-plane) - The signalling plane used for reliable DECT control and broadcast messages.
• User plane (U-plane) - The plane used for end-to-end user information and application-dependent procedures.
• Logical Link Number (LLN) - The identifier that distinguishes a DLC link instance, with values for class U, class A, and assignable class B use.
• Data Link Identifier (DLI) - The identifier that uniquely identifies a LAPC instance within both the Fixed radio Termination (FT) and Portable radio Termination (PT).
• Service Access Point Identifier (SAPI) - The field that identifies the higher-layer SAP associated with a frame.
• Forward Error Control (FEC) - The error-control method used in some U-plane services to detect or correct transmission errors.
• Automatic-Repeat-Request (ARQ) - The retransmission method used in services that acknowledge or repeat damaged data.

Who uses SIST EN 300 175-4 V2.2.1:2009?

DECT equipment designers use this standard when building base stations, handsets, and interworking units that must exchange signalling and user data correctly. Protocol engineers use it to implement the DLC state machines, frame formats, and service primitives. Test labs and certification teams use it to check interoperability, framing, acknowledgements, broadcast behavior, and error handling. Buyers and quality managers use it to judge whether a DECT product supports the required DLC services for voice, data, or mixed traffic.

Which standards are used with SIST EN 300 175-4 V2.2.1:2009?

The DECT companion parts EN 300 175-1, -2, -3, -5, -6, and -8 provide the overall DECT Common Interface framework, the physical layer, MAC layer, NWK layer, identities and addressing, and speech and audio coding and transmission. ETSI TS 144 006 is cited for a related data link layer specification.

ITU-T Q.920 and Q.921 provide ISDN data-link-layer background, V.42 and V.110 are used for data-correction and terminal-support concepts, X.200 and X.210 provide the OSI layered-model conventions, and ISO/IEC 8073 provides the checksum basis used for the Lc underlying checksum.

What does the SIST EN 300 175-4 V2.2.1:2009 document contain?

The document contains C-plane frame formats, address and control-field coding, broadcast frame structures, and the command/response set used for link operation. It also contains the primitive lists and management procedures that define how DLC interacts with MAC, NWK, and the interworking unit.

For U-plane operation, it contains service definitions, segmentation and reassembly rules, buffering behavior, sequence handling, error control methods, and rate-adaptation procedures. It also includes tables and figures for frame formats, control octets, rate codings, and service-specific procedures such as FEC, ARQ, and DIC behavior.

Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)
European Standard (Telecommunications series)

Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 4: Data Link Control (DLC) layer

2 Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)

Reference
REN/DECT-000248-4
Keywords
DECT, IMT-2000, mobility, radio, TDD, TDMA
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

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, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)
Contents
Intellectual Property Rights.11
Foreword.11
1 Scope.12
2 References.12
2.1 Normative references.13
2.2 Informative references.14
3 Definitions, symbols and abbreviations .14
3.1 Definitions.14
3.2 Symbols and abbreviations.14
4 Data Link Control (DLC) layer overview .16
4.1 General.16
4.2 C-plane services.17
4.3 U-plane services.18
4.4 Lower Layer Management Entity (LLME) .20
5 C-plane service characteristics .20
5.1 Data link service (LAPC+Lc).20
5.1.1 General.20
5.1.2 LAPC types of operation .21
5.1.3 Establishment of information transfer modes .21
5.1.3.1 Data Link Identifier (DLI) .21
5.1.3.2 LAPC states.21
5.2 Broadcast service (Lb).22
6 Frame structures for C-plane services.23
6.1 Data link service frame structure.23
6.1.1 General frame structure .23
6.1.2 Lc frame delimiting and transparency .24
6.1.3 Transmission order.24
6.1.4 Routing to logical channels.24
6.1.4.1 C /CL logical channel.24
F F
6.1.4.2 C /CL logical channel.25
S S
6.1.5 Invalid frames.25
6.2 Broadcast service frame structure.26
6.2.1 Standard frame structure.26
6.2.2 Extended frame structure .26
7 Elements of procedures and formats of fields for C-plane peer-to-peer communication.27
7.1 General.27
7.2 Address field formats.27
7.3 Address field parameters.27
7.3.1 REServed bit (RES).27
7.3.2 Command Response (C/R) bit .27
7.3.3 SAPI field.27
7.3.4 New Link Flag (NLF) bit.28
7.3.5 LLN-field.28
7.3.6 Data Link Identifiers (DLI).28
7.4 Control field formats .29
7.5 Control field parameters.29
7.5.1 Poll/Final (P/F) bit .29
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) .30
7.5.2.4 Send sequence Number N(S) .30
ETSI
4 Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)
7.5.2.5 Receive state Variable V(R).30
7.5.2.6 Receive sequence Number N(R) .30
7.5.3 Unacknowledged operation variables and sequence numbers .30
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.31
7.7.1 Length indicator field extension bit (N).31
7.7.2 More data bit (M).31
7.7.3 Length parameter (L ) .31
I
7.7.4 Extended length parameter (L ) .32
JJ
7.7.5 Reserved bit (RES) .32
7.8 Fill field format .32
7.9 Checksum field format .32
7.10 Checksum field parameters .32
7.11 Commands and responses .34
7.11.1 Information (I) command.34
7.11.2 Receive Ready (RR) command/response.34
7.11.3 Receive Not Ready (RNR) command/response.35
7.11.4 REJect (REJ) command/response .35
7.11.5 Set Asynchronous Balanced Mode (SABM) command.35
7.11.6 Disconnect Mode (DM) response .35
7.11.7 Unnumbered Information (UI) command .35
7.11.8 DISConnect (DISC) command .36
7.11.9 Unnumbered ACK (UA) response.36
8 Primitives .36
8.1 Primitive types.36
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.37
8.3.2 S-SAP primitives.38
8.3.2.1 DL_ESTABLISH primitive.38
8.3.2.2 DL_RELEASE primitive.38
8.3.2.3 DL_DATA primitive.39
8.3.2.4 DL_UNIT_DATA primitive.39
8.3.2.5 DL_SUSPEND primitive.39
8.3.2.6 DL_RESUME primitive.39
8.3.2.7 DL_ENC_KEY primitive.40
8.3.2.8 DL_ENCRYPT primitive.40
8.3.2.9 DL_SERVICE_MOD primitive.40
8.3.3 B-SAP primitives.40
8.3.3.1 DL_BROADCAST primitive.41
8.3.3.2 DL_EXPEDITED primitive.41
8.4 Primitives to the interworking unit.41
8.4.1 Parameter definitions.41
8.4.2 LU -SAP primitives .42
X
8.4.2.1 DL_U_DATA primitive.42
8.4.2.2 DL_U_UNIT_DATA primitive.42
8.4.2.3 DL_U_ERROR primitive.42
9 C-plane peer-to-peer procedures .43
9.1 General.43
9.2 Point to point acknowledged operation .43
9.2.1 Procedure for the use of the P/F bit .43
9.2.1.1 Class A acknowledged information transfer .43
9.2.1.2 Class B acknowledged information transfer .44
9.2.2 Use of LLN.44
9.2.2.1 Class A operation.44
9.2.2.2 Class B operation .44
9.2.3 Link establishment and information transfer in class A operation.44
9.2.3.1 Establishing class A operation .44
9.2.3.2 Class A acknowledged information transfer .45
ETSI
5 Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)
9.2.3.3 Transmission of class A I-frames.45
9.2.3.4 Reception of class A I-frames .46
9.2.3.5 Receiving acknowledgements.46
9.2.3.6 Waiting for acknowledgement.46
9.2.3.7 Release of class A operation .47
9.2.3.8 Re-establishment of class A operation .47
9.2.4 Establishing class B multiple frame operation.47
9.2.4.1 Overview.47
9.2.4.2 Class B multiple frame establishment procedures.48
9.2.4.3 Class B LLN assignment procedures .49
9.2.4.3.1 PT establishment.49
9.2.4.3.2 FT establishment.50
9.2.5 Link maintenance and information transfer in class B multiple frame operation .50
9.2.5.1 Transmitting I-frames.50
9.2.5.2 Receiving I-frames.51
9.2.5.2.1 P bit set to 1.51
9.2.5.2.2 P bit set to 0.51
9.2.5.3 Sending and receiving acknowledgements.51
9.2.5.3.1 Sending acknowledgements.51
9.2.5.3.2 Receiving acknowledgements.51
9.2.5.4 Receiving REJ-frames.52
9.2.5.5 Receiving RNR-frames.53
9.2.5.6 LAPC own receiver busy condition .54
9.2.5.7 Waiting acknowledgement.54
9.2.5.8 Appropriate supervisory frame.55
9.2.6 Release of class B multiple frame operation.55
9.2.7 Link suspension and resumption.56
9.2.7.1 Link suspension.56
9.2.7.1.1 Class B acknowledged suspend.56
9.2.7.1.2 Unacknowledged suspend.57
9.2.7.2 Class B link resumption .58
9.2.7.3 Connection handover.59
9.2.7.3.1 Class A connection handover .60
9.2.7.3.2 Class B connection handover .61
9.2.7.3.3 Expiry of connection handover timer .61
9.2.8 Re-establishment of class B multi-frame operation .61
9.2.8.1 Criteria for re-establishment.61
9.2.8.2 Procedure.62
9.2.9 Exception handling.62
9.2.9.1 General.62
9.2.9.2 Class B exception condition reporting and recovery.63
9.2.9.2.1 N(S) sequence error.63
9.2.9.2.2 N(R) sequence error .63
9.2.9.2.3 Timer recovery condition .63
9.2.9.2.4 Collision of identical transmitted and received commands .63
9.3 Unacknowledged operation.64
9.3.1 Use of LLN for unacknowledged information transfer.64
9.3.2 Class U link establishment.64
9.3.3 Unacknowledged information transfer.64
9.3.3.1 Transmission of unacknowledged information .64
9.3.3.2 Reception of unacknowledged information .64
9.3.4 Unacknowledged release.64
9.4 Broadcast operation.65
9.4.1 Normal operation.65
9.4.1.1 Procedure in the Fixed radio Termination (FT) .65
9.4.1.2 Procedure in the Portable radio Termination (PT) .65
9.4.2 Expedited operation.65
9.4.2.1 Procedure in the Fixed radio Termination (FT) .65
9.4.2.2 Procedure in the Portable radio Termination (PT) .65
9.5 MAC layer interfaces .66
9.5.1 MC-SAP.66
9.5.1.1 C-plane overview.66
ETSI
6 Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)
9.5.1.2 C-plane service data procedures.66
9.5.1.3 U-plane service data.67
9.5.2 MB-SAP.67
9.5.2.1 C-plane service data procedures.67
9.5.2.2 U-plane service data.67
9.5.3 MA-SAP.68
9.5.3.1 Overview.68
9.5.3.2 Service data procedures.68
10 Management procedures.68
10.1 Lower Layer Management Entity (LLME) .68
10.2 MAC connection management.69
10.2.1 MAC connection set-up.69
10.2.2 MAC connection release.69
10.2.3 MAC connection modification.69
10.2.4 MAC connection identifiers.70
10.2.4.1 Overview.70
10.2.4.2 Advanced MAC Connection Identifiers (AMCI).70
10.2.4.3 Basic MAC Connection Identifiers (BMCI) .71
10.2.4.4 MAC Connection Endpoint Identifier (MCEI) .71
10.2.5 Selection of logical channel (C or C ).71
S F
10.3 DLC C-plane (LAPC) management .72
10.3.1 Provision of link signature.72
10.3.2 Routing of connection oriented links.72
10.3.3 Routing of connectionless links.73
10.4 DLC U-plane (LUX) management.73
10.4.1 U-plane establishment.73
10.4.2 U-plane release.73
10.4.3 U-plane suspend and resume .73
10.5 Connection handover management .74
10.6 Ciphering management.74
10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure .74
10.6.1.1 Providing a key to the MAC layer .74
10.6.1.2 Starting and stopping the ciphering.75
10.6.1.3 Connection handover.75
10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM
procedure .75
10.7 Broadband data link management .75
11 U-plane service characteristics.76
11.1 General.76
11.2 LU1 TRansparent UnProtected service (TRUP) .76
11.3 LU2 Frame RELay service (FREL).77
11.3.1 General.77
11.3.2 Checksum operation.78
11.3.3 Segmentation and transmission class.78
11.3.4 Data transmission.79
11.3.4.1 Send side procedure .79
11.3.4.2 Receive side procedure.79
11.4 LU3 Frame SWItching service (FSWI).80
11.5 LU4 Forward Error Correction (FEC) service.80
11.6 LU5 Basic Rate Adaption service (BRAT) .81
11.6.1 Overview.81
11.6.2 Protected service operation.82
11.6.2.1 General.82
11.6.2.2 Data buffering and initial rate adaptation.82
11.6.2.3 Multi-channel set multiplexing.83
11.6.2.4 Segmentation of Multiplexed Data Units (MDU).84
11.6.2.5 Frame sequencing and addition of control and fill octets.85
11.6.2.6 Frame transmission.86
11.6.3 Unprotected service operation .87
11.6.3.1 General.87
ETSI
7 Final draft ETSI EN 300 175-4 V2.2.0 (2008-06)
11.6.3.2 Data buffering and initial rate adaption.87
11.6.3.3 Multi-channel set multiplexing.87
11.6.3.4 Segmentation of MDUs.89
11.6.3.5 Frame transmission.89
11.7 LU6 Secondary Rate AdapTion (SRAT) service .89
11.7.1 General.89
11.8 LU16 ESCape Service (ESC).90
11.8.1 General.90
11.9 LU7 64 kbit/s data bearer service.91
11.9.1 General.91
11.9.2 Physical layer service.91
11.9.3 MAC layer service.91
11.9.4 DLC layer service .91
11.9.4.1 Architectural model.91
11.9.4.1.1 Transmit (Tx) frame buffering .92
11.9.4.1.2 Receive (Rx) frame buffering.92
11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC).92
11.9.4.2.1 Control field .93
11.9.4.2.2 Information field.95
11.9.4.2.3 ARQ checksum.96
11.9.4.3 Procedures for normal operation.96
11.9.4.3.1 Establishment and synchronization procedures.96
11.9.4.3.2 Active phase .98
11.9.4.3.3 Release.100
11.9.4.4 Exceptional procedures.100
11.9.4.4.1 Invalid frame condition.100
11.9.4.4.2 Establishment.100
11.9.4.4.3 Transmitting frames.100
11.9.4.4.4 Receiving frames.100
11.9.4.4.5 Sending acknowledgements.101
11.9.4.4.6 Forwarding of received data.101
11.9.4.4.7 N(R) sequence error .101
11.9.4.4.8 N(O) sequence error .101
11.9.4.4.9 N(S) sequence error.102
11.9.4.4.10 Format error.102
11.9.4.4.11 Abnormal release.102
11.9.4.4.12 Implicit reset.102
11.9.5 Network layer service .102
11.9.5.1 LCE service.102
11.9.5.2 CC service.102
11.10 LU8 service.
...

European Standard (Telecommunications series)

Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 4: Data Link Control (DLC) layer

2 ETSI EN 300 175-4 V2.2.1 (2008-11)

Reference
REN/DECT-000248-4
Keywords
DECT, IMT-2000, mobility, radio, TDD, TDMA
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

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, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
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 2008.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI EN 300 175-4 V2.2.1 (2008-11)
Contents
Intellectual Property Rights.11
Foreword.11
1 Scope.12
2 References.12
2.1 Normative references.13
2.2 Informative references.14
3 Definitions, symbols and abbreviations .14
3.1 Definitions.14
3.2 Symbols and abbreviations.14
4 Data Link Control (DLC) layer overview .16
4.1 General.16
4.2 C-plane services.17
4.3 U-plane services.18
4.4 Lower Layer Management Entity (LLME) .20
5 C-plane service characteristics .20
5.1 Data link service (LAPC+Lc).20
5.1.1 General.20
5.1.2 LAPC types of operation .21
5.1.3 Establishment of information transfer modes .21
5.1.3.1 Data Link Identifier (DLI) .21
5.1.3.2 LAPC states.21
5.2 Broadcast service (Lb).22
6 Frame structures for C-plane services.23
6.1 Data link service frame structure.23
6.1.1 General frame structure .23
6.1.2 Lc frame delimiting and transparency .24
6.1.3 Transmission order.24
6.1.4 Routing to logical channels.24
6.1.4.1 C /CL logical channel.24
F F
6.1.4.2 C /CL logical channel.25
S S
6.1.5 Invalid frames.25
6.2 Broadcast service frame structure.26
6.2.1 Standard frame structure.26
6.2.2 Extended frame structure .26
7 Elements of procedures and formats of fields for C-plane peer-to-peer communication.27
7.1 General.27
7.2 Address field formats.27
7.3 Address field parameters.27
7.3.1 REServed bit (RES).27
7.3.2 Command Response (C/R) bit .27
7.3.3 SAPI field.27
7.3.4 New Link Flag (NLF) bit.28
7.3.5 LLN-field.28
7.3.6 Data Link Identifiers (DLI).28
7.4 Control field formats .29
7.5 Control field parameters.29
7.5.1 Poll/Final (P/F) bit .29
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) .30
7.5.2.4 Send sequence Number N(S) .30
ETSI
4 ETSI EN 300 175-4 V2.2.1 (2008-11)
7.5.2.5 Receive state Variable V(R).30
7.5.2.6 Receive sequence Number N(R) .30
7.5.3 Unacknowledged operation variables and sequence numbers .30
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.31
7.7.1 Length indicator field extension bit (N).31
7.7.2 More data bit (M).31
7.7.3 Length parameter (L ) .31
I
7.7.4 Extended length parameter (L ) .32
JJ
7.7.5 Reserved bit (RES) .32
7.8 Fill field format .32
7.9 Checksum field format .32
7.10 Checksum field parameters .32
7.11 Commands and responses .34
7.11.1 Information (I) command.34
7.11.2 Receive Ready (RR) command/response.34
7.11.3 Receive Not Ready (RNR) command/response.35
7.11.4 REJect (REJ) command/response .35
7.11.5 Set Asynchronous Balanced Mode (SABM) command.35
7.11.6 Disconnect Mode (DM) response .35
7.11.7 Unnumbered Information (UI) command .35
7.11.8 DISConnect (DISC) command .36
7.11.9 Unnumbered ACK (UA) response.36
8 Primitives .36
8.1 Primitive types.36
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.37
8.3.2 S-SAP primitives.38
8.3.2.1 DL_ESTABLISH primitive.38
8.3.2.2 DL_RELEASE primitive.38
8.3.2.3 DL_DATA primitive.39
8.3.2.4 DL_UNIT_DATA primitive.39
8.3.2.5 DL_SUSPEND primitive.39
8.3.2.6 DL_RESUME primitive.39
8.3.2.7 DL_ENC_KEY primitive.40
8.3.2.8 DL_ENCRYPT primitive.40
8.3.2.9 DL_SERVICE_MOD primitive.40
8.3.3 B-SAP primitives.40
8.3.3.1 DL_BROADCAST primitive.41
8.3.3.2 DL_EXPEDITED primitive.41
8.4 Primitives to the interworking unit.41
8.4.1 Parameter definitions.41
8.4.2 LU -SAP primitives .42
X
8.4.2.1 DL_U_DATA primitive.42
8.4.2.2 DL_U_UNIT_DATA primitive.42
8.4.2.3 DL_U_ERROR primitive.42
9 C-plane peer-to-peer procedures .43
9.1 General.43
9.2 Point to point acknowledged operation .43
9.2.1 Procedure for the use of the P/F bit .43
9.2.1.1 Class A acknowledged information transfer .43
9.2.1.2 Class B acknowledged information transfer .44
9.2.2 Use of LLN.44
9.2.2.1 Class A operation.44
9.2.2.2 Class B operation .44
9.2.3 Link establishment and information transfer in class A operation.44
9.2.3.1 Establishing class A operation .44
9.2.3.2 Class A acknowledged information transfer .45
ETSI
5 ETSI EN 300 175-4 V2.2.1 (2008-11)
9.2.3.3 Transmission of class A I-frames.45
9.2.3.4 Reception of class A I-frames .46
9.2.3.5 Receiving acknowledgements.46
9.2.3.6 Waiting for acknowledgement.46
9.2.3.7 Release of class A operation .47
9.2.3.8 Re-establishment of class A operation .47
9.2.4 Establishing class B multiple frame operation.47
9.2.4.1 Overview.47
9.2.4.2 Class B multiple frame establishment procedures.48
9.2.4.3 Class B LLN assignment procedures .49
9.2.4.3.1 PT establishment.49
9.2.4.3.2 FT establishment.50
9.2.5 Link maintenance and information transfer in class B multiple frame operation .50
9.2.5.1 Transmitting I-frames.50
9.2.5.2 Receiving I-frames.51
9.2.5.2.1 P bit set to 1.51
9.2.5.2.2 P bit set to 0.51
9.2.5.3 Sending and receiving acknowledgements.51
9.2.5.3.1 Sending acknowledgements.51
9.2.5.3.2 Receiving acknowledgements.51
9.2.5.4 Receiving REJ-frames.52
9.2.5.5 Receiving RNR-frames.53
9.2.5.6 LAPC own receiver busy condition .54
9.2.5.7 Waiting acknowledgement.54
9.2.5.8 Appropriate supervisory frame.55
9.2.6 Release of class B multiple frame operation.55
9.2.7 Link suspension and resumption.56
9.2.7.1 Link suspension.56
9.2.7.1.1 Class B acknowledged suspend.56
9.2.7.1.2 Unacknowledged suspend.57
9.2.7.2 Class B link resumption .58
9.2.7.3 Connection handover.59
9.2.7.3.1 Class A connection handover .60
9.2.7.3.2 Class B connection handover .61
9.2.7.3.3 Expiry of connection handover timer .61
9.2.8 Re-establishment of class B multi-frame operation .61
9.2.8.1 Criteria for re-establishment.61
9.2.8.2 Procedure.62
9.2.9 Exception handling.62
9.2.9.1 General.62
9.2.9.2 Class B exception condition reporting and recovery.63
9.2.9.2.1 N(S) sequence error.63
9.2.9.2.2 N(R) sequence error .63
9.2.9.2.3 Timer recovery condition .63
9.2.9.2.4 Collision of identical transmitted and received commands .63
9.3 Unacknowledged operation.64
9.3.1 Use of LLN for unacknowledged information transfer.64
9.3.2 Class U link establishment.64
9.3.3 Unacknowledged information transfer.64
9.3.3.1 Transmission of unacknowledged information .64
9.3.3.2 Reception of unacknowledged information .64
9.3.4 Unacknowledged release.64
9.4 Broadcast operation.65
9.4.1 Normal operation.65
9.4.1.1 Procedure in the Fixed radio Termination (FT) .65
9.4.1.2 Procedure in the Portable radio Termination (PT) .65
9.4.2 Expedited operation.65
9.4.2.1 Procedure in the Fixed radio Termination (FT) .65
9.4.2.2 Procedure in the Portable radio Termination (PT) .65
9.5 MAC layer interfaces .66
9.5.1 MC-SAP.66
9.5.1.1 C-plane overview.66
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6 ETSI EN 300 175-4 V2.2.1 (2008-11)
9.5.1.2 C-plane service data procedures.66
9.5.1.3 U-plane service data.67
9.5.2 MB-SAP.67
9.5.2.1 C-plane service data procedures.67
9.5.2.2 U-plane service data.67
9.5.3 MA-SAP.68
9.5.3.1 Overview.68
9.5.3.2 Service data procedures.68
10 Management procedures.68
10.1 Lower Layer Management Entity (LLME) .68
10.2 MAC connection management.69
10.2.1 MAC connection set-up.69
10.2.2 MAC connection release.69
10.2.3 MAC connection modification.69
10.2.4 MAC connection identifiers.70
10.2.4.1 Overview.70
10.2.4.2 Advanced MAC Connection Identifiers (AMCI).70
10.2.4.3 Basic MAC Connection Identifiers (BMCI) .71
10.2.4.4 MAC Connection Endpoint Identifier (MCEI) .71
10.2.5 Selection of logical channel (C or C ).71
S F
10.3 DLC C-plane (LAPC) management .72
10.3.1 Provision of link signature.72
10.3.2 Routing of connection oriented links.72
10.3.3 Routing of connectionless links.73
10.4 DLC U-plane (LUX) management.73
10.4.1 U-plane establishment.73
10.4.2 U-plane release.73
10.4.3 U-plane suspend and resume .73
10.5 Connection handover management .74
10.6 Ciphering management.74
10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure .74
10.6.1.1 Providing a key to the MAC layer .74
10.6.1.2 Starting and stopping the ciphering.75
10.6.1.3 Connection handover.75
10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM
procedure .75
10.7 Broadband data link management .75
11 U-plane service characteristics.76
11.1 General.76
11.2 LU1 TRansparent UnProtected service (TRUP) .76
11.3 LU2 Frame RELay service (FREL).77
11.3.1 General.77
11.3.2 Checksum operation.78
11.3.3 Segmentation and transmission class.78
11.3.4 Data transmission.79
11.3.4.1 Send side procedure .79
11.3.4.2 Receive side procedure.79
11.4 LU3 Frame SWItching service (FSWI).80
11.5 LU4 Forward Error Correction (FEC) service.80
11.6 LU5 Basic Rate Adaption service (BRAT) .81
11.6.1 Overview.81
11.6.2 Protected service operation.82
11.6.2.1 General.82
11.6.2.2 Data buffering and initial rate adaptation.82
11.6.2.3 Multi-channel set multiplexing.83
11.6.2.4 Segmentation of Multiplexed Data Units (MDU).84
11.6.2.5 Frame sequencing and addition of control and fill octets.85
11.6.2.6 Frame transmission.86
11.6.3 Unprotected service operation .87
11.6.3.1 General.87
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7 ETSI EN 300 175-4 V2.2.1 (2008-11)
11.6.3.2 Data buffering and initial rate adaption.87
11.6.3.3 Multi-channel set multiplexing.87
11.6.3.4 Segmentation of MDUs.89
11.6.3.5 Frame transmission.89
11.7 LU6 Secondary Rate AdapTion (SRAT) service .89
11.7.1 General.89
11.8 LU16 ESCape Service (ESC).90
11.8.1 General.90
11.9 LU7 64 kbit/s data bearer service.91
11.9.1 General.91
11.9.2 Physical layer service.91
11.9.3 MAC layer service.91
11.9.4 DLC layer service .91
11.9.4.1 Architectural model.91
11.9.4.1.1 Transmit (Tx) frame buffering .92
11.9.4.1.2 Receive (Rx) frame buffering.92
11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC).92
11.9.4.2.1 Control field .93
11.9.4.2.2 Information field.95
11.9.4.2.3 ARQ checksum.96
11.9.4.3 Procedures for normal operation.96
11.9.4.3.1 Establishment and synchronization procedures.96
11.9.4.3.2 Active phase .98
11.9.4.3.3 Release.100
11.9.4.4 Exceptional procedures.100
11.9.4.4.1 Invalid frame condition.100
11.9.4.4.2 Establishment.100
11.9.4.4.3 Transmitting frames.100
11.9.4.4.4 Receiving frames.100
11.9.4.4.5 Sending acknowledgements.101
11.9.4.4.6 Forwarding of received data.101
11.9.4.4.7 N(R) sequence error .101
11.9.4.4.8 N(O) sequence error .101
11.9.4.4.9 N(S) sequence error.102
11.9.4.4.10 Format error.102
11.9.4.4.11 Abnormal release.102
11.9.4.4.12 Implicit reset.102
11.9.5 Network layer service .102
11.9.5.1 LCE service.102
11.9.5.2 CC service.102
11.10 LU8 service.103
11.10.1 Physical layer service.
...

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 2.2.1SIST EN 300 175-4 V2.2.1:2009en01-januar-2009SIST EN 300 175-4 V2.2.1:2009SLOVENSKI
STANDARD
ETSI ETSI EN 300 175-4 V2.2.1 (2008-11) 2
Reference REN/DECT-000248-4 Keywords DECT, IMT-2000, mobility, radio, TDD, TDMA ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: [phone]
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Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
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, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp 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 2008. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. SIST EN 300 175-4 V2.2.1:2009

ETSI ETSI EN 300 175-4 V2.2.1 (2008-11) 3
Contents Intellectual Property Rights.11 Foreword.11 1 Scope.12 2 References.12 2.1 Normative references.13 2.2 Informative references.14 3 Definitions, symbols and abbreviations.14 3.1 Definitions.14 3.2 Symbols and abbreviations.14 4 Data Link Control (DLC) layer overview.16 4.1 General.16 4.2 C-plane services.17 4.3 U-plane services.18 4.4 Lower Layer Management Entity (LLME).20 5 C-plane service characteristics.20 5.1 Data link service (LAPC+Lc).20 5.1.1 General.20 5.1.2 LAPC types of operation.21 5.1.3 Establishment of information transfer modes.21 5.1.3.1 Data Link Identifier (DLI).21 5.1.3.2 LAPC states.21 5.2 Broadcast service (Lb).22 6 Frame structures for C-plane services.23 6.1 Data link service frame structure.23 6.1.1 General frame structure.23 6.1.2 Lc frame delimiting and transparency.24 6.1.3 Transmission order.24 6.1.4 Routing to logical channels.24 6.1.4.1 CF/CLF logical channel.24 6.1.4.2 CS/CLS logical channel.25 6.1.5 Invalid frames.25 6.2 Broadcast service frame structure.26 6.2.1 Standard frame structure.26 6.2.2 Extended frame structure.26 7 Elements of procedures and formats of fields for C-plane peer-to-peer communication.27 7.1 General.27 7.2 Address field formats.27 7.3 Address field parameters.27 7.3.1 REServed bit (RES).27 7.3.2 Command Response (C/R) bit.27 7.3.3 SAPI field.27 7.3.4 New Link Flag (NLF) bit.28 7.3.5 LLN-field.28 7.3.6 Data Link Identifiers (DLI).28 7.4 Control field formats.29 7.5 Control field parameters.29 7.5.1 Poll/Final (P/F) bit.29 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).30 7.5.2.4 Send sequence Number N(S).30 SIST EN 300 175-4 V2.2.1:2009

ETSI ETSI EN 300 175-4 V2.2.1 (2008-11) 4
7.5.2.5 Receive state Variable V(R).30 7.5.2.6 Receive sequence Number N(R).30 7.5.3 Unacknowledged operation variables and sequence numbers.30 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.31 7.7.1 Length indicator field extension bit (N).31 7.7.2 More data bit (M).31 7.7.3 Length parameter (LI).31 7.7.4 Extended length parameter (LJJ).32 7.7.5 Reserved bit (RES).32 7.8 Fill field format.32 7.9 Checksum field format.32 7.10 Checksum field parameters.32 7.11 Commands and responses.34 7.11.1 Information (I) command.34 7.11.2 Receive Ready (RR) command/response.34 7.11.3 Receive Not Ready (RNR) command/response.35 7.11.4 REJect (REJ) command/response.35 7.11.5 Set Asynchronous Balanced Mode (SABM) command.35 7.11.6 Disconnect Mode (DM) response.35 7.11.7 Unnumbered Information (UI) command.35 7.11.8 DISConnect (DISC) command.36 7.11.9 Unnumbered ACK (UA) response.36 8 Primitives.36 8.1 Primitive types.36 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.37 8.3.2 S-SAP primitives.38 8.3.2.1 DL_ESTABLISH primitive.38 8.3.2.2 DL_RELEASE primitive.38 8.3.2.3 DL_DATA primitive.39 8.3.2.4 DL_UNIT_DATA primitive.39 8.3.2.5 DL_SUSPEND primitive.39 8.3.2.6 DL_RESUME primitive.39 8.3.2.7 DL_ENC_KEY primitive.40 8.3.2.8 DL_ENCRYPT primitive.40 8.3.2.9 DL_SERVICE_MOD primitive.40 8.3.3 B-SAP primitives.40 8.3.3.1 DL_BROADCAST primitive.41 8.3.3.2 DL_EXPEDITED primitive.41 8.4 Primitives to the interworking unit.41 8.4.1 Parameter definitions.41 8.4.2 LUX-SAP primitives.42 8.4.2.1 DL_U_DATA primitive.42 8.4.2.2 DL_U_UNIT_DATA primitive.42 8.4.2.3 DL_U_ERROR primitive.42 9 C-plane peer-to-peer procedures.43 9.1 General.43 9.2 Point to point acknowledged operation.43 9.2.1 Procedure for the use of the P/F bit.43 9.2.1.1 Class A acknowledged information transfer.43 9.2.1.2 Class B acknowledged information transfer.44 9.2.2 Use of LLN.44 9.2.2.1 Class A operation.44 9.2.2.2 Class B operation.44 9.2.3 Link establishment and information transfer in class A operation.44 9.2.3.1 Establishing class A operation.44 9.2.3.2 Class A acknowledged information transfer.45 SIST EN 300 175-4 V2.2.1:2009

ETSI ETSI EN 300 175-4 V2.2.1 (2008-11) 5
9.2.3.3 Transmission of class A I-frames.45 9.2.3.4 Reception of class A I-frames.46 9.2.3.5 Receiving acknowledgements.46 9.2.3.6 Waiting for acknowledgement.46 9.2.3.7 Release of class A operation.47 9.2.3.8 Re-establishment of class A operation.47 9.2.4 Establishing class B multiple frame operation.47 9.2.4.1 Overview.47 9.2.4.2 Class B multiple frame establishment procedures.48 9.2.4.3 Class B LLN assignment procedures.49 9.2.4.3.1 PT establishment.49 9.2.4.3.2 FT establishment.50 9.2.5 Link maintenance and information transfer in class B multiple frame operation.50 9.2.5.1 Transmitting I-frames.50 9.2.5.2 Receiving I-frames.51 9.2.5.2.1 P bit set to 1.51 9.2.5.2.2 P bit set to 0.51 9.2.5.3 Sending and receiving acknowledgements.51 9.2.5.3.1 Sending acknowledgements.51 9.2.5.3.2 Receiving acknowledgements.51 9.2.5.4 Receiving REJ-frames.52 9.2.5.5 Receiving RNR-frames.53 9.2.5.6 LAPC own receiver busy condition.54 9.2.5.7 Waiting acknowledgement.54 9.2.5.8 Appropriate supervisory frame.55 9.2.6 Release of class B multiple frame operation.55 9.2.7 Link suspension and resumption.56 9.2.7.1 Link suspension.56 9.2.7.1.1 Class B acknowledged suspend.56 9.2.7.1.2 Unacknowledged suspend.57 9.2.7.2 Class B link resumption.58 9.2.7.3 Connection handover.59 9.2.7.3.1 Class A connection handover.60 9.2.7.3.2 Class B connection handover.61 9.2.7.3.3 Expiry of connection handover timer.61 9.2.8 Re-establishment of class B multi-frame operation.61 9.2.8.1 Criteria for re-establishment.61 9.2.8.2 Procedure.62 9.2.9 Exception handling.62 9.2.9.1 General.62 9.2.9.2 Class B exception condition reporting and recovery.63 9.2.9.2.1 N(S) sequence error.63 9.2.9.2.2 N(R) sequence error.63 9.2.9.2.3 Timer recovery condition.63 9.2.9.2.4 Collision of identical transmitted and received commands.63 9.3 Unacknowledged operation.64 9.3.1 Use of LLN for unacknowledged information transfer.64 9.3.2 Class U link establishment.64 9.3.3 Unacknowledged information transfer.64 9.3.3.1 Transmission of unacknowledged information.64 9.3.3.2 Reception of unacknowledged information.64 9.3.4 Unacknowledged release.64 9.4 Broadcast operation.65 9.4.1 Normal operation.65 9.4.1.1 Procedure in the Fixed radio Termination (FT).65 9.4.1.2 Procedure in the Portable radio Termination (PT).65 9.4.2 Expedited operation.65 9.4.2.1 Procedure in the Fixed radio Termination (FT).65 9.4.2.2 Procedure in the Portable radio Termination (PT).65 9.5 MAC layer interfaces.66 9.5.1 MC-SAP.66 9.5.1.1 C-plane overview.66 SIST EN 300 175-4 V2.2.1:2009

ETSI ETSI EN 300 175-4 V2.2.1 (2008-11) 6
9.5.1.2 C-plane service data procedures.66 9.5.1.3 U-plane service data.67 9.5.2 MB-SAP.67 9.5.2.1 C-plane service data procedures.67 9.5.2.2 U-plane service data.67 9.5.3 MA-SAP.68 9.5.3.1 Overview.68 9.5.3.2 Service data procedures.68 10 Management procedures.68 10.1 Lower Layer Management Entity (LLME).68 10.2 MAC connection management.69 10.2.1 MAC connection set-up.69 10.2.2 MAC connection release.69 10.2.3 MAC connection modification.69 10.2.4 MAC connection identifiers.70 10.2.4.1 Overview.70 10.2.4.2 Advanced MAC Connection Identifiers (AMCI).70 10.2.4.3 Basic MAC Connection Identifiers (BMCI).71 10.2.4.4 MAC Connection Endpoint Identifier (MCEI).71 10.2.5 Selection of logical channel (CS or CF).71 10.3 DLC C-plane (LAPC) management.72 10.3.1 Provision of link signature.72 10.3.2 Routing of connection oriented links.72 10.3.3 Routing of connectionless links.73 10.4 DLC U-plane (LUX) management.73 10.4.1 U-plane establishment.73 10.4.2 U-plane release.73 10.4.3 U-plane suspend and resume.73 10.5 Connection handover management.74 10.6 Ciphering management.74 10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure.74 10.6.1.1 Providing a key to the MAC layer.74 10.6.1.2 Starting and stopping the ciphering.75 10.6.1.3 Connection handover.75 10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM procedure.75 10.7 Broadband data link management.75 11 U-plane service characteristics.76 11.1 General.76 11.2 LU1 TRansparent UnProtected service (TRUP).76 11.3 LU2 Frame RELay service (FREL).77 11.3.1 General.77 11.3.2 Checksum operation.78 11.3.3 Segmentation and transmission class.78 11.3.4 Data transmission.79 11.3.4.1 Send side procedure.79 11.3.4.2 Receive side procedure.79 11.4 LU3 Frame SWItching service (FSWI).80 11.5 LU4 Forward Error Correction (FEC) service.80 11.6 LU5 Basic Rate Adaption service (BRAT).81 11.6.1 Overview.81 11.6.2 Protected service operation.82 11.6.2.1 General.82 11.6.2.2 Data buffering and initial rate adaptation.82 11.6.2.3 Multi-channel set multiplexing.83 11.6.2.4 Segmentation of Multiplexed Data Units (MDU).84 11.6.2.5 Frame sequencing and addition of control and fill octets.85 11.6.2.6 Frame transmission.86 11.6.3 Unprotected service operation.87 11.6.3.1 General.87 SIST EN 300 175-4 V2.2.1:2009

ETSI ETSI EN 300 175-4 V2.2.1 (2008-11) 7
11.6.3.2 Data buffering and initial rate adaption.87 11.6.3.3 Multi-channel set multiplexing.87 11.6.3.4 Segmentation of MDUs.89 11.6.3.5 Frame transmission.89 11.7 LU6 Secondary Rate AdapTion (SRAT) service.89 11.7.1 General.89 11.8 LU16 ESCape Service (ESC).90 11.8.1 General.90 11.9 LU7 64 kbit/s data bearer service.91 11.9.1 General.91 11.9.2 Physical layer service.91 11.9.3 MAC layer service.91 11.9.4 DLC layer service.91 11.9.4.1 Architectural model.91 11.9.4.1.1 Transmit (Tx) frame buffering.92 11.9.4.1.2 Receive (Rx) frame buffering.92 11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC).92 11.9.4.2.1 Control field.93 11.9.4.2.2 Information field.95 11.9.4.2.3 ARQ checksum.96 11.9.4.3 Procedures for normal operation.96 11.9.4.3.1 Establishment and synchronization procedures.96 11.9.4.3.2 Active phase.98 11.9.4.3.3 Release.100 11.9.4.4 Exceptional procedures.100 11.9.4.4.1 Invalid frame condition.100 11.9.4.4.2 Establishment.100 11.9.4.4.3 Transmitting frames.100 11.9.4.4.4 Receiving frames.100 11.9.4.4.5 Sending acknowledgements.101 11.9.4.4.6 Forwarding of received data.101 11.9.4.4.7 N(R) sequence error.101 11.9.4.4.8 N(O) sequence error.101 11.9.4.4.9 N(S) sequence error.102 11.9.4.4.10 Format error.102 11.9.4.4.11 Abnormal release.102 11.9.4.4.12 Implicit reset.102 11.9.5 Network layer service.102 11.9.5.1 LCE service.102 11.9.5.2 CC service.102 11.10 LU8 service.103 11.10.1 Physical layer service.
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