ETSI EN 300 175-4 V2.5.1 (2013-08)
Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
REN/DECT-000268-4
Digitalne izboljšane brezvrvične telekomunikacije (DECT) - Skupni vmesnik (CI) - 4. del: Plast krmiljenja podatkovnih povezav (DLC)
Ta dokument je eden od delov specifikacije skupnega vmesnika (CI) za digitalne izboljšane brezvrvične telekomunikacije (DECT).
Ta dokument določa plast krmiljenja podatkovnih povezav (DLC). Plast DLC je 4. del standarda za skupni vmesnik za DECT, plast 2b pa sklada protokolov DECT.
Za to (pod)plast DLC sta določeni dve ravni delovanja. Imenujeta se nadzorna raven (C-raven) in uporabniška raven (U-raven). C-raven obravnava zlasti vidike signalizacije DECT. Zagotavlja zanesljivo storitev točka-točka, ki s protokolom LAP omogoča prenos sporočil omrežne plasti (NWK), zaščiten pred napakami. Poleg tega C-raven zagotavlja ločeno storitev (oddajanja) točka-več točk (Lb). U-raven obravnava le uporabniške informacije od sprejema do vročitve. Ta raven vključuje večino postopkov DECT, ki so odvisni od uporabe. Več nadomestnih storitev (način z vodi in način s paketi) je obravnavanih kot skupina neodvisnih entitet. Vsaka storitev zagotavlja eno ali več podatkovnih povezav U-ravni točka-točka, pri čemer podrobne lastnosti teh povezav določajo zadevne potrebe posamezne storitve. Določene storitve zajemajo širok nabor delovanja, od »nezaščitene z nizko stopnjo zakasnitve« pri govorni uporabi do »visoko zaščitene s spremenljivo zakasnitvijo« pri uporabi z lokalnim omrežjem. OPOMBA: Delovanje DLC ni nujno vezano na neko določeno uporabo. Primer: storitev »nezaščitena z nizko stopnjo zakasnitve« se lahko uporablja tudi za podatkovne uporabe, npr. pri zagotavljanju zaščite podatkov zunaj protokola DECT. Ta dokument uporablja načela in terminologijo modela plasti, kot je opisano v Priporočilih ITU-T X.200 [14] in X.210 [15].
Ta dokument vključuje novo generacijo digitalnih izboljšanih brezvrvičnih telekomunikacij, nadaljnji razvoj standarda za digitalne izboljšane brezvrvične telekomunikacije, ki uvaja širokopasovni govor, izpopolnjene podatkovne storitve, nove tipe rež in druge tehnične izpopolnitve.
General Information
Overview
ETSI EN 300 175-4 V2.5.1 (2013-08) defines the Data Link Control (DLC) layer of the Digital Enhanced Cordless Telecommunications (DECT) Common Interface (CI). As layer 2b of the DECT protocol stack, this standard specifies the DLC (sub)layer functions, services and formats that enable reliable transfer of both signalling and user data between DECT entities. The document also incorporates New Generation DECT enhancements such as wideband speech, improved data services and new slot types.
Key topics and technical requirements
The standard organizes the DLC around two separate planes and provides detailed protocol elements:
- C-plane (Control plane)
- Reliable point-to-point data link service (LAPC + Lc) for DECT signalling and NWK-layer messages.
- A point-to-multipoint broadcast service (Lb) for network-wide information.
- U-plane (User plane)
- End-to-end user information services implemented as a family of independent circuit-mode and packet-mode services.
- Services range from unprotected, low-delay links suitable for real-time speech to highly protected, variable-delay links for LAN-like data.
- Frame structures and transparency - formats for information, address, control, length, fill and checksum fields for C-plane frames.
- Procedures and primitives - link establishment, release, suspend/resume, data transfer primitives to MAC and NWK layers (S‑SAP, B‑SAP, LUX‑SAP), and error handling primitives.
- Sequence control and flow control - multiple frame operation, sequence numbering (V(S), V(A), V(R)), supervisory/unnumbered functions and Poll/Final (P/F) use.
- Management - Lower Layer Management Entity (LLME) interactions and service modification primitives.
- Standards alignment - layered model terminology per ITU‑T X.200 and X.210; integration with DECT CI and New Generation DECT features.
Practical applications and who uses it
This standard is essential for professionals designing, testing and integrating DECT-based voice and data systems:
- DECT device manufacturers (handsets, base stations, repeaters) implementing DLC for signalling and user channels.
- Firmware and protocol engineers developing LAPC/Lc implementations and U‑plane services.
- System integrators and network designers deploying cordless telephony and DECT-based data links (including wideband speech services).
- Test labs and certification bodies performing conformance testing against DECT CI layer 2b requirements.
- Product managers planning performance profiles (low-delay voice vs. highly protected data) for DECT deployments.
Related standards
- ETSI EN 300 175 (other parts) - DECT Common Interface family
- ITU‑T Recommendation X.200 / X.210 - layered model and terminology
- ETSI New Generation DECT specifications - wideband speech and enhanced data services
Keywords: DECT, DLC, Data Link Control, Common Interface, C‑plane, U‑plane, LAPC, broadcast Lb, New Generation DECT, layer 2b, DECT protocol stack.
Standards Content (Sample)
Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
European Standard
Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 4: Data Link Control (DLC) layer
2 Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
Reference
REN/DECT-000268-4
Keywords
DECT, DLC, IMT-2000, mobility, radio, TDD,
TDMA
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
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 2013.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
Contents
Intellectual Property Rights . 12
Foreword . 12
1 Scope . 13
2 References . 14
2.1 Normative references . 14
2.2 Informative references . 15
3 Definitions, symbols and abbreviations . 15
3.1 Definitions . 15
3.2 Symbols and abbreviations . 15
4 Data Link Control (DLC) layer overview . 18
4.1 General . 18
4.2 C-plane services . 19
4.3 U-plane services . 20
4.4 Lower Layer Management Entity (LLME) . 23
5 C-plane service characteristics . 23
5.1 Data link service (LAPC+Lc) . 23
5.1.1 General . 23
5.1.2 LAPC types of operation . 24
5.1.3 Establishment of information transfer modes . 24
5.1.3.1 Data Link Identifier (DLI) . 24
5.1.3.2 LAPC states. 24
5.2 Broadcast service (Lb) . 25
6 Frame structures for C-plane services . 26
6.1 Data link service frame structure . 26
6.1.1 General frame structure . 26
6.1.2 Lc frame delimiting and transparency . 27
6.1.3 Transmission order . 27
6.1.4 Routing to logical channels . 27
6.1.4.1 C /CL logical channel . 27
F F
6.1.4.2 C /CL logical channel . 28
S S
6.1.5 Invalid frames . 28
6.2 Broadcast service frame structure. 29
6.2.1 Standard frame structure . 29
6.2.2 Extended frame structure . 29
7 Elements of procedures and formats of fields for C-plane peer-to-peer communication . 30
7.1 General . 30
7.2 Address field formats . 30
7.3 Address field parameters . 30
7.3.1 REServed bit (RES) . 30
7.3.2 Command Response (C/R) bit . 30
7.3.3 SAPI field . 30
7.3.4 New Link Flag (NLF) bit . 31
7.3.5 LLN-field . 31
7.3.6 Data Link Identifiers (DLI) . 31
7.4 Control field formats . 32
7.5 Control field parameters . 32
7.5.1 Poll/Final (P/F) bit . 32
7.5.2 Multiple frame operation variables and sequence numbers . 32
7.5.2.1 Modulus . 32
7.5.2.2 Send state Variable V(S) . 32
7.5.2.3 Acknowledge state Variable V(A) . 33
7.5.2.4 Send sequence Number N(S) . 33
ETSI
4 Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
7.5.2.5 Receive state Variable V(R) . 33
7.5.2.6 Receive sequence Number N(R) . 33
7.5.3 Unacknowledged operation variables and sequence numbers . 33
7.5.4 Supervisory and Unnumbered function bits S and U . 33
7.6 Length indicator field format. 33
7.7 Length indicator field parameters . 34
7.7.1 Length indicator field extension bit (N) . 34
7.7.2 More data bit (M) . 34
7.7.3 Length parameter (L ) . 34
I
7.7.4 Extended length parameter (L ) . 35
JJ
7.7.5 Reserved bit (RES) . 35
7.8 Fill field format . 35
7.9 Checksum field format . 35
7.10 Checksum field parameters . 35
7.11 Commands and responses . 37
7.11.1 Information (I) command . 37
7.11.2 Receive Ready (RR) command/response . 37
7.11.3 Receive Not Ready (RNR) command/response . 38
7.11.4 REJect (REJ) command/response . 38
7.11.5 Set Asynchronous Balanced Mode (SABM) command . 38
7.11.6 Disconnect Mode (DM) response . 38
7.11.7 Unnumbered Information (UI) command . 38
7.11.8 DISConnect (DISC) command . 39
7.11.9 Unnumbered ACK (UA) response . 39
8 Primitives . 39
8.1 Primitive types . 39
8.2 Primitives to the MAC layer (lower layer) . 39
8.3 Primitives to the NWK layer (higher layer) . 39
8.3.1 Parameter definitions . 40
8.3.2 S-SAP primitives . 41
8.3.2.1 DL_ESTABLISH primitive . 41
8.3.2.2 DL_RELEASE primitive . 41
8.3.2.3 DL_DATA primitive . 42
8.3.2.4 DL_UNIT_DATA primitive . 42
8.3.2.5 DL_SUSPEND primitive . 42
8.3.2.6 DL_RESUME primitive . 42
8.3.2.7 DL_ENC_KEY primitive . 43
8.3.2.8 DL_ENCRYPT primitive . 43
8.3.2.9 DL_SERVICE_MOD primitive . 43
8.3.3 B-SAP primitives . 43
8.3.3.1 DL_BROADCAST primitive . 44
8.3.3.2 DL_EXPEDITED primitive . 44
8.4 Primitives to the interworking unit . 44
8.4.1 Parameter definitions . 44
8.4.2 LU -SAP primitives . 45
X
8.4.2.1 DL_U_DATA primitive . 45
8.4.2.2 DL_U_UNIT_DATA primitive . 45
8.4.2.3 DL_U_ERROR primitive . 45
9 C-plane peer-to-peer procedures . 46
9.1 General . 46
9.2 Point to point acknowledged operation . 46
9.2.1 Procedure for the use of the P/F bit . 46
9.2.1.1 Class A acknowledged information transfer . 46
9.2.1.2 Class B acknowledged information transfer . 47
9.2.2 Use of LLN . 47
9.2.2.1 Class A operation . 47
9.2.2.2 Class B operation . 47
9.2.3 Link establishment and information transfer in class A operation . 47
9.2.3.1 Establishing class A operation . 47
9.2.3.2 Class A acknowledged information transfer . 48
ETSI
5 Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
9.2.3.3 Transmission of class A I-frames . 48
9.2.3.4 Reception of class A I-frames . 49
9.2.3.5 Receiving acknowledgements . 49
9.2.3.6 Waiting for acknowledgement . 49
9.2.3.7 Release of class A operation . 50
9.2.3.8 Re-establishment of class A operation . 50
9.2.4 Establishing class B multiple frame operation . 50
9.2.4.1 Overview . 50
9.2.4.2 Class B multiple frame establishment procedures . 51
9.2.4.3 Class B LLN assignment procedures . 52
9.2.4.3.1 PT establishment . 52
9.2.4.3.2 FT establishment . 53
9.2.5 Link maintenance and information transfer in class B multiple frame operation . 53
9.2.5.1 Transmitting I-frames. 53
9.2.5.2 Receiving I-frames . 54
9.2.5.2.1 P bit set to 1 . 54
9.2.5.2.2 P bit set to 0 . 54
9.2.5.3 Sending and receiving acknowledgements . 54
9.2.5.3.1 Sending acknowledgements . 54
9.2.5.3.2 Receiving acknowledgements . 54
9.2.5.4 Receiving REJ-frames . 55
9.2.5.5 Receiving RNR-frames . 56
9.2.5.6 LAPC own receiver busy condition . 57
9.2.5.7 Waiting acknowledgement . 57
9.2.5.8 Appropriate supervisory frame. 58
9.2.6 Release of class B multiple frame operation . 58
9.2.7 Link suspension and resumption . 59
9.2.7.1 Link su sp ension . 59
9.2.7.1.1 Class B acknowledged suspend . 59
9.2.7.1.2 Unacknowledged suspend . 60
9.2.7.2 Class B link resumption . 61
9.2.7.3 Connection handover . 62
9.2.7.3.1 Class A connection handover . 63
9.2.7.3.2 Class B connection handover . 64
9.2.7.3.3 Expiry of connection handover timer . 64
9.2.8 Re-establishment of class B multi-frame operation . 64
9.2.8.1 Criteria for re-establishment. 64
9.2.8.2 Procedure . 65
9.2.9 Exception handling . 65
9.2.9.1 General . 65
9.2.9.2 Class B exception condition reporting and recovery . 66
9.2.9.2.1 N(S) sequence error . 66
9.2.9.2.2 N(R) sequence error . 66
9.2.9.2.3 Timer recovery condition . 66
9.2.9.2.4 Collision of identical transmitted and received commands . 66
9.3 Unacknowledged operation . 67
9.3.1 Use of LLN for unacknowledged information transfer . 67
9.3.2 Class U link establishment . 67
9.3.3 Unacknowledged information transfer . 67
9.3.3.1 Transmission of unacknowledged information . 67
9.3.3.2 Reception of unacknowledged information . 67
9.3.4 Unacknowledged release . 67
9.4 Broadcast operation . 67
9.4.1 Normal operation . 67
9.4.1.1 Procedure in the Fixed radio Termination (FT) . 67
9.4.1.2 Procedure in the Portable radio Termination (PT) . 68
9.4.2 Expedited operation . 68
9.4.2.1 Procedure in the Fixed radio Termination (FT) . 68
9.4.2.2 Procedure in the Portable radio Termination (PT) . 68
9.5 MAC layer interfaces . 69
9.5.1 MC-SAP . 69
9.5.1.1 C-plane overview . 69
ETSI
6 Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
9.5.1.2 C-plane service data procedures . 69
9.5.1.3 U-plane service data . 70
9.5.2 MB-SAP . 70
9.5.2.1 C-plane service data procedures . 70
9.5.2.2 U-plane service data . 70
9.5.3 MA-SAP . 71
9.5.3.1 Overview . 71
9.5.3.2 Service data procedures . 71
10 Management procedures. 71
10.1 Lower Layer Management Entity (LLME) . 71
10.2 MAC connection management . 72
10.2.1 MAC connection set-up . 72
10.2.2 MAC connection release . 72
10.2.3 MAC connection modification . 72
10.2.4 MAC connection identifiers . 73
10.2.4.1 Overview . 73
10.2.4.2 Advanced MAC Connection Identifiers (AMCI) . 73
10.2.4.3 Basic MAC Connection Identifiers (BMCI) . 74
10.2.4.4 MAC Connection Endpoint Identifier (MCEI) . 74
10.2.5 Selection of logical channel (C or C ) . 74
S F
10.3 DLC C-plane (LAPC) management . 75
10.3.1 Provision of link signature . 75
10.3.2 Routing of connection oriented links . 75
10.3.3 Routing of connectionless links . 76
10.4 DLC U-plane (LUX) management . 76
10.4.1 U-plane establishment. 76
10.4.2 U-plane release . 76
10.4.3 U-plane suspend and resume . 76
10.5 Connection handover management . 77
10.6 Ciphering management . 77
10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure . 77
10.6.1.1 Providing a key to the MAC layer . 77
10.6.1.2 Starting and stopping the ciphering . 78
10.6.1.3 Connection handover . 78
10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM
procedure . 78
10.7 Broadband data link management . 78
11 U-plane service characteristics . 79
11.1 General . 79
11.2 LU1 TRansparent UnProtected service (TRUP) . 79
11.3 LU2 Frame RELay service (FREL). 80
11.3.1 General . 80
11.3.2 Checksum operation . 81
11.3.3 Segmentation and transmission class . 81
11.3.4 Data transmission . 82
11.3.4.1 Send side procedure . 82
11.3.4.2 Receive side procedure . 82
11.4 LU3 Frame SWItching service (FSWI) . 83
11.5 LU4 Forward Error Correction (FEC) service. 83
11.6 LU5 Basic RATe adaption service (BRAT) . 84
11.6.1 Overview . 84
11.6.2 Protected service operation . 85
11.6.2.1 General . 85
11.6.2.2 Data buffering and initial rate adaptation . 85
11.6.2.3 Multi-channel set multiplexing . 86
11.6.2.4 Segmentation of Multiplexed Data Units (MDU) . 87
11.6.2.5 Frame sequencing and addition of control and fill octets . 88
11.6.2.6 Frame transmission . 89
11.6.3 Unprotected service operation . 90
11.6.3.1 General . 90
ETSI
7 Draft ETSI EN 300 175-4 V2.5.0 (2013-04)
11.6.3.2 Data buffering and initial rate adaption . 90
11.6.3.3 Multi-channel set multiplexing . 90
11.6.3.4 Segmentation of MDUs . 92
11.6.3.5 Frame transmission . 92
11.7 LU6 Secondary RATe adaption (SRAT) service . 92
11.7.1 General . 92
11.8 LU16 ESCape Service (ESC) . 93
11.8.1 General . 93
11.9 LU7 64 kbit/s data bearer service . 94
11.9.1 General . 94
11.9.2 Physical layer service. 94
11.9.3 MAC layer service . 94
11.9.4 DLC layer service . 94
11.9.4.1 Architectural model . 94
11.9.4.1.1 Transmit (Tx) frame buffering . 95
11.9.4.1.2 Receive (Rx) frame buffering . 95
11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC) . 95
11.9.4.2.1 Control field . 96
11.9.4.2.2 Information field . 98
11.9.4.2.3 ARQ chec ksum . 99
11.9.4.3 Procedures for normal operation . 99
11.9.4.3.1 Establishment and synchronization procedures . 99
11.9.4.3.2 Active phase . 101
11.9.4.3.3 Release. 103
11.9.4.4 Exceptional procedures . 103
11.9.4.4.1 Invalid frame condition . 103
11.9.4.4.2 Establishment . 103
11.9.4.4.3 Transmitting frames . 103
11.9.4.4.4 Receiving frames . 103
11.9.4.4.5 Sending acknowledgements . 104
11.9.4.4.6 Forwarding of received data . 104
11.9.4.4.7 N(R) sequence error . 104
11.9.4.4.8 N(O) sequence error . 104
11.9.4.4.9 N(S) sequence error . 105
11.9.4.4.10 Format error . 105
11.9.4.4.11 Abnormal release . 105
11.9.4.4.12 Implicit reset . 105
11.9.5 Network layer service .
...
European Standard
Digital Enhanced Cordless Telecommunications (DECT);
Common Interface (CI);
Part 4: Data Link Control (DLC) layer
2 ETSI EN 300 175-4 V2.5.1 (2013-08)
Reference
REN/DECT-000268-4
Keywords
DECT, DLC, IMT-2000, mobility, radio, TDD,
TDMA
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
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 2013.
All rights reserved.
TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM
3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 175-4 V2.5.1 (2013-08)
Contents
Intellectual Property Rights . 12
Foreword . 12
1 Scope . 13
2 References . 14
2.1 Normative references . 14
2.2 Informative references . 15
3 Definitions, symbols and abbreviations . 15
3.1 Definitions . 15
3.2 Symbols and abbreviations . 15
4 Data Link Control (DLC) layer overview . 18
4.1 General . 18
4.2 C-plane services . 19
4.3 U-plane services . 20
4.4 Lower Layer Management Entity (LLME) . 23
5 C-plane service characteristics . 23
5.1 Data link service (LAPC+Lc) . 23
5.1.1 General . 23
5.1.2 LAPC types of operation . 24
5.1.3 Establishment of information transfer modes . 24
5.1.3.1 Data Link Identifier (DLI) . 24
5.1.3.2 LAPC states. 24
5.2 Broadcast service (Lb) . 25
6 Frame structures for C-plane services . 26
6.1 Data link service frame structure . 26
6.1.1 General frame structure . 26
6.1.2 Lc frame delimiting and transparency . 27
6.1.3 Transmission order . 27
6.1.4 Routing to logical channels . 27
6.1.4.1 C /CL logical channel . 27
F F
6.1.4.2 C /CL logical channel . 28
S S
6.1.5 Invalid frames . 28
6.2 Broadcast service frame structure. 29
6.2.1 Standard frame structure . 29
6.2.2 Extended frame structure . 29
7 Elements of procedures and formats of fields for C-plane peer-to-peer communication . 30
7.1 General . 30
7.2 Address field formats . 30
7.3 Address field parameters . 30
7.3.1 REServed bit (RES) . 30
7.3.2 Command Response (C/R) bit . 30
7.3.3 SAPI field . 30
7.3.4 New Link Flag (NLF) bit . 31
7.3.5 LLN-field . 31
7.3.6 Data Link Identifiers (DLI) . 31
7.4 Control field formats . 32
7.5 Control field parameters . 32
7.5.1 Poll/Final (P/F) bit . 32
7.5.2 Multiple frame operation variables and sequence numbers . 32
7.5.2.1 Modulus . 32
7.5.2.2 Send state Variable V(S) . 32
7.5.2.3 Acknowledge state Variable V(A) . 33
7.5.2.4 Send sequence Number N(S) . 33
ETSI
4 ETSI EN 300 175-4 V2.5.1 (2013-08)
7.5.2.5 Receive state Variable V(R) . 33
7.5.2.6 Receive sequence Number N(R) . 33
7.5.3 Unacknowledged operation variables and sequence numbers . 33
7.5.4 Supervisory and Unnumbered function bits S and U . 33
7.6 Length indicator field format. 33
7.7 Length indicator field parameters . 34
7.7.1 Length indicator field extension bit (N) . 34
7.7.2 More data bit (M) . 34
7.7.3 Length parameter (L ) . 34
I
7.7.4 Extended length parameter (L ) . 35
JJ
7.7.5 Reserved bit (RES) . 35
7.8 Fill field format . 35
7.9 Checksum field format . 35
7.10 Checksum field parameters . 35
7.11 Commands and responses . 37
7.11.1 Information (I) command . 37
7.11.2 Receive Ready (RR) command/response . 37
7.11.3 Receive Not Ready (RNR) command/response . 38
7.11.4 REJect (REJ) command/response . 38
7.11.5 Set Asynchronous Balanced Mode (SABM) command . 38
7.11.6 Disconnect Mode (DM) response . 38
7.11.7 Unnumbered Information (UI) command . 38
7.11.8 DISConnect (DISC) command . 39
7.11.9 Unnumbered ACK (UA) response . 39
8 Primitives . 39
8.1 Primitive types . 39
8.2 Primitives to the MAC layer (lower layer) . 39
8.3 Primitives to the NWK layer (higher layer) . 39
8.3.1 Parameter definitions . 40
8.3.2 S-SAP primitives . 41
8.3.2.1 DL_ESTABLISH primitive . 41
8.3.2.2 DL_RELEASE primitive . 41
8.3.2.3 DL_DATA primitive . 42
8.3.2.4 DL_UNIT_DATA primitive . 42
8.3.2.5 DL_SUSPEND primitive . 42
8.3.2.6 DL_RESUME primitive . 42
8.3.2.7 DL_ENC_KEY primitive . 43
8.3.2.8 DL_ENCRYPT primitive . 43
8.3.2.9 DL_SERVICE_MOD primitive . 43
8.3.3 B-SAP primitives . 43
8.3.3.1 DL_BROADCAST primitive . 44
8.3.3.2 DL_EXPEDITED primitive . 44
8.4 Primitives to the interworking unit . 44
8.4.1 Parameter definitions . 44
8.4.2 LU -SAP primitives . 45
X
8.4.2.1 DL_U_DATA primitive . 45
8.4.2.2 DL_U_UNIT_DATA primitive . 45
8.4.2.3 DL_U_ERROR primitive . 45
9 C-plane peer-to-peer procedures . 46
9.1 General . 46
9.2 Point to point acknowledged operation . 46
9.2.1 Procedure for the use of the P/F bit . 46
9.2.1.1 Class A acknowledged information transfer . 46
9.2.1.2 Class B acknowledged information transfer . 47
9.2.2 Use of LLN . 47
9.2.2.1 Class A operation . 47
9.2.2.2 Class B operation . 47
9.2.3 Link establishment and information transfer in class A operation . 47
9.2.3.1 Establishing class A operation . 47
9.2.3.2 Class A acknowledged information transfer . 48
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5 ETSI EN 300 175-4 V2.5.1 (2013-08)
9.2.3.3 Transmission of class A I-frames . 48
9.2.3.4 Reception of class A I-frames . 49
9.2.3.5 Receiving acknowledgements . 49
9.2.3.6 Waiting for acknowledgement . 49
9.2.3.7 Release of class A operation . 50
9.2.3.8 Re-establishment of class A operation . 50
9.2.4 Establishing class B multiple frame operation . 50
9.2.4.1 Overview . 50
9.2.4.2 Class B multiple frame establishment procedures . 51
9.2.4.3 Class B LLN assignment procedures . 52
9.2.4.3.1 PT establishment . 52
9.2.4.3.2 FT establishment . 53
9.2.5 Link maintenance and information transfer in class B multiple frame operation . 53
9.2.5.1 Transmitting I-frames. 53
9.2.5.2 Receiving I-frames . 54
9.2.5.2.1 P bit set to 1 . 54
9.2.5.2.2 P bit set to 0 . 54
9.2.5.3 Sending and receiving acknowledgements . 54
9.2.5.3.1 Sending acknowledgements . 54
9.2.5.3.2 Receiving acknowledgements . 54
9.2.5.4 Receiving REJ-frames . 55
9.2.5.5 Receiving RNR-frames . 56
9.2.5.6 LAPC own receiver busy condition . 57
9.2.5.7 Waiting acknowledgement . 57
9.2.5.8 Appropriate supervisory frame. 58
9.2.6 Release of class B multiple frame operation . 58
9.2.7 Link suspension and resumption . 59
9.2.7.1 Link su sp ension . 59
9.2.7.1.1 Class B acknowledged suspend . 59
9.2.7.1.2 Unacknowledged suspend . 60
9.2.7.2 Class B link resumption . 61
9.2.7.3 Connection handover . 62
9.2.7.3.1 Class A connection handover . 63
9.2.7.3.2 Class B connection handover . 64
9.2.7.3.3 Expiry of connection handover timer . 64
9.2.8 Re-establishment of class B multi-frame operation . 64
9.2.8.1 Criteria for re-establishment. 64
9.2.8.2 Procedure . 65
9.2.9 Exception handling . 65
9.2.9.1 General . 65
9.2.9.2 Class B exception condition reporting and recovery . 66
9.2.9.2.1 N(S) sequence error . 66
9.2.9.2.2 N(R) sequence error . 66
9.2.9.2.3 Timer recovery condition . 66
9.2.9.2.4 Collision of identical transmitted and received commands . 66
9.3 Unacknowledged operation . 67
9.3.1 Use of LLN for unacknowledged information transfer . 67
9.3.2 Class U link establishment . 67
9.3.3 Unacknowledged information transfer . 67
9.3.3.1 Transmission of unacknowledged information . 67
9.3.3.2 Reception of unacknowledged information . 67
9.3.4 Unacknowledged release . 67
9.4 Broadcast operation . 67
9.4.1 Normal operation . 67
9.4.1.1 Procedure in the Fixed radio Termination (FT) . 67
9.4.1.2 Procedure in the Portable radio Termination (PT) . 68
9.4.2 Expedited operation . 68
9.4.2.1 Procedure in the Fixed radio Termination (FT) . 68
9.4.2.2 Procedure in the Portable radio Termination (PT) . 68
9.5 MAC layer interfaces . 69
9.5.1 MC-SAP . 69
9.5.1.1 C-plane overview . 69
ETSI
6 ETSI EN 300 175-4 V2.5.1 (2013-08)
9.5.1.2 C-plane service data procedures . 69
9.5.1.3 U-plane service data . 70
9.5.2 MB-SAP . 70
9.5.2.1 C-plane service data procedures . 70
9.5.2.2 U-plane service data . 70
9.5.3 MA-SAP . 71
9.5.3.1 Overview . 71
9.5.3.2 Service data procedures . 71
10 Management procedures. 71
10.1 Lower Layer Management Entity (LLME) . 71
10.2 MAC connection management . 72
10.2.1 MAC connection set-up . 72
10.2.2 MAC connection release . 72
10.2.3 MAC connection modification . 72
10.2.4 MAC connection identifiers . 73
10.2.4.1 Overview . 73
10.2.4.2 Advanced MAC Connection Identifiers (AMCI) . 73
10.2.4.3 Basic MAC Connection Identifiers (BMCI) . 74
10.2.4.4 MAC Connection Endpoint Identifier (MCEI) . 74
10.2.5 Selection of logical channel (C or C ) . 74
S F
10.3 DLC C-plane (LAPC) management . 75
10.3.1 Provision of link signature . 75
10.3.2 Routing of connection oriented links . 75
10.3.3 Routing of connectionless links . 76
10.4 DLC U-plane (LUX) management . 76
10.4.1 U-plane establishment. 76
10.4.2 U-plane release . 76
10.4.3 U-plane suspend and resume . 76
10.5 Connection handover management . 77
10.6 Ciphering management . 77
10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure . 77
10.6.1.1 Providing a key to the MAC layer . 77
10.6.1.2 Starting and stopping the ciphering . 78
10.6.1.3 Connection handover . 78
10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM
procedure . 78
10.7 Broadband data link management . 78
11 U-plane service characteristics . 79
11.1 General . 79
11.2 LU1 TRansparent UnProtected service (TRUP) . 79
11.3 LU2 Frame RELay service (FREL). 80
11.3.1 General . 80
11.3.2 Checksum operation . 81
11.3.3 Segmentation and transmission class . 81
11.3.4 Data transmission . 82
11.3.4.1 Send side procedure . 82
11.3.4.2 Receive side procedure . 82
11.4 LU3 Frame SWItching service (FSWI) . 83
11.5 LU4 Forward Error Correction (FEC) service. 83
11.6 LU5 Basic RATe adaption service (BRAT) . 84
11.6.1 Overview . 84
11.6.2 Protected service operation . 85
11.6.2.1 General . 85
11.6.2.2 Data buffering and initial rate adaptation . 85
11.6.2.3 Multi-channel set multiplexing . 86
11.6.2.4 Segmentation of Multiplexed Data Units (MDU) . 87
11.6.2.5 Frame sequencing and addition of control and fill octets . 88
11.6.2.6 Frame transmission . 89
11.6.3 Unprotected service operation . 90
11.6.3.1 General . 90
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7 ETSI EN 300 175-4 V2.5.1 (2013-08)
11.6.3.2 Data buffering and initial rate adaption . 90
11.6.3.3 Multi-channel set multiplexing . 90
11.6.3.4 Segmentation of MDUs . 92
11.6.3.5 Frame transmission . 92
11.7 LU6 Secondary RATe adaption (SRAT) service . 92
11.7.1 General . 92
11.8 LU16 ESCape Service (ESC) . 93
11.8.1 General . 93
11.9 LU7 64 kbit/s data bearer service . 94
11.9.1 General . 94
11.9.2 Physical layer service. 94
11.9.3 MAC layer service . 94
11.9.4 DLC layer service . 94
11.9.4.1 Architectural model . 94
11.9.4.1.1 Transmit (Tx) frame buffering . 95
11.9.4.1.2 Receive (Rx) frame buffering . 95
11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC) . 95
11.9.4.2.1 Control field . 96
11.9.4.2.2 Information field . 98
11.9.4.2.3 ARQ chec ksum . 99
11.9.4.3 Procedures for normal operation . 99
11.9.4.3.1 Establishment and synchronization procedures . 99
11.9.4.3.2 Active phase . 101
11.9.4.3.3 Release. 103
11.9.4.4 Exceptional procedures . 103
11.9.4.4.1 Invalid frame condition . 103
11.9.4.4.2 Establishment . 103
11.9.4.4.3 Transmitting frames . 103
11.9.4.4.4 Receiving frames . 103
11.9.4.4.5 Sending acknowledgements . 104
11.9.4.4.6 Forwarding of received data . 104
11.9.4.4.7 N(R) sequence error . 104
11.9.4.4.8 N(O) sequence error . 104
11.9.4.4.9 N(S) sequence error . 105
11.9.4.4.10 Format error . 105
11.9.4.4.11 Abnormal release . 105
11.9.4.4.12 Implicit reset . 105
11.9.5 Network layer service . 105
11.9.5.1 LCE service .
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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 2.5.1SIST EN 300 175-4 V2.5.1:2013en01-oktober-2013SIST EN 300 175-4 V2.5.1:2013SLOVENSKI
STANDARD
European Standard SIST EN 300 175-4 V2.5.1:2013
ETSI ETSI EN 300 175-4 V2.5.1 (2013-08) 2
Reference REN/DECT-000268-4 Keywords DECT, DLC, IMT-2000, mobility, radio, TDD, TDMA ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Fax: +33 4 93 65 47 16
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 2013. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 300 175-4 V2.5.1:2013
ETSI ETSI EN 300 175-4 V2.5.1 (2013-08) 3 Contents Intellectual Property Rights . 12 Foreword . 12 1 Scope . 13 2 References . 14 2.1 Normative references . 14 2.2 Informative references . 15 3 Definitions, symbols and abbreviations . 15 3.1 Definitions . 15 3.2 Symbols and abbreviations . 15 4 Data Link Control (DLC) layer overview . 18 4.1 General . 18 4.2 C-plane services . 19 4.3 U-plane services . 20 4.4 Lower Layer Management Entity (LLME) . 23 5 C-plane service characteristics . 23 5.1 Data link service (LAPC+Lc) . 23 5.1.1 General . 23 5.1.2 LAPC types of operation . 24 5.1.3 Establishment of information transfer modes . 24 5.1.3.1 Data Link Identifier (DLI) . 24 5.1.3.2 LAPC states. 24 5.2 Broadcast service (Lb) . 25 6 Frame structures for C-plane services . 26 6.1 Data link service frame structure . 26 6.1.1 General frame structure . 26 6.1.2 Lc frame delimiting and transparency . 27 6.1.3 Transmission order . 27 6.1.4 Routing to logical channels . 27 6.1.4.1 CF/CLF logical channel . 27 6.1.4.2 CS/CLS logical channel . 28 6.1.5 Invalid frames . 28 6.2 Broadcast service frame structure. 29 6.2.1 Standard frame structure . 29 6.2.2 Extended frame structure . 29 7 Elements of procedures and formats of fields for C-plane peer-to-peer communication . 30 7.1 General . 30 7.2 Address field formats . 30 7.3 Address field parameters . 30 7.3.1 REServed bit (RES) . 30 7.3.2 Command Response (C/R) bit . 30 7.3.3 SAPI field . 30 7.3.4 New Link Flag (NLF) bit . 31 7.3.5 LLN-field . 31 7.3.6 Data Link Identifiers (DLI) . 31 7.4 Control field formats . 32 7.5 Control field parameters . 32 7.5.1 Poll/Final (P/F) bit . 32 7.5.2 Multiple frame operation variables and sequence numbers . 32 7.5.2.1 Modulus . 32 7.5.2.2 Send state Variable V(S) . 32 7.5.2.3 Acknowledge state Variable V(A) . 33 7.5.2.4 Send sequence Number N(S) . 33 SIST EN 300 175-4 V2.5.1:2013
ETSI ETSI EN 300 175-4 V2.5.1 (2013-08) 4 7.5.2.5 Receive state Variable V(R) . 33 7.5.2.6 Receive sequence Number N(R) . 33 7.5.3 Unacknowledged operation variables and sequence numbers . 33 7.5.4 Supervisory and Unnumbered function bits S and U . 33 7.6 Length indicator field format. 33 7.7 Length indicator field parameters . 34 7.7.1 Length indicator field extension bit (N) . 34 7.7.2 More data bit (M) . 34 7.7.3 Length parameter (LI) . 34 7.7.4 Extended length parameter (LJJ) . 35 7.7.5 Reserved bit (RES) . 35 7.8 Fill field format . 35 7.9 Checksum field format . 35 7.10 Checksum field parameters . 35 7.11 Commands and responses . 37 7.11.1 Information (I) command . 37 7.11.2 Receive Ready (RR) command/response . 37 7.11.3 Receive Not Ready (RNR) command/response . 38 7.11.4 REJect (REJ) command/response . 38 7.11.5 Set Asynchronous Balanced Mode (SABM) command . 38 7.11.6 Disconnect Mode (DM) response . 38 7.11.7 Unnumbered Information (UI) command . 38 7.11.8 DISConnect (DISC) command . 39 7.11.9 Unnumbered ACK (UA) response . 39 8 Primitives . 39 8.1 Primitive types . 39 8.2 Primitives to the MAC layer (lower layer) . 39 8.3 Primitives to the NWK layer (higher layer) . 39 8.3.1 Parameter definitions . 40 8.3.2 S-SAP primitives . 41 8.3.2.1 DL_ESTABLISH primitive . 41 8.3.2.2 DL_RELEASE primitive . 41 8.3.2.3 DL_DATA primitive . 42 8.3.2.4 DL_UNIT_DATA primitive . 42 8.3.2.5 DL_SUSPEND primitive . 42 8.3.2.6 DL_RESUME primitive . 42 8.3.2.7 DL_ENC_KEY primitive . 43 8.3.2.8 DL_ENCRYPT primitive . 43 8.3.2.9 DL_SERVICE_MOD primitive . 43 8.3.3 B-SAP primitives . 43 8.3.3.1 DL_BROADCAST primitive . 44 8.3.3.2 DL_EXPEDITED primitive . 44 8.4 Primitives to the interworking unit . 44 8.4.1 Parameter definitions . 44 8.4.2 LUX-SAP primitives . 45 8.4.2.1 DL_U_DATA primitive . 45 8.4.2.2 DL_U_UNIT_DATA primitive . 45 8.4.2.3 DL_U_ERROR primitive . 45 9 C-plane peer-to-peer procedures . 46 9.1 General . 46 9.2 Point to point acknowledged operation . 46 9.2.1 Procedure for the use of the P/F bit . 46 9.2.1.1 Class A acknowledged information transfer . 46 9.2.1.2 Class B acknowledged information transfer . 47 9.2.2 Use of LLN . 47 9.2.2.1 Class A operation . 47 9.2.2.2 Class B operation . 47 9.2.3 Link establishment and information transfer in class A operation . 47 9.2.3.1 Establishing class A operation . 47 9.2.3.2 Class A acknowledged information transfer . 48 SIST EN 300 175-4 V2.5.1:2013
ETSI ETSI EN 300 175-4 V2.5.1 (2013-08) 5 9.2.3.3 Transmission of class A I-frames . 48 9.2.3.4 Reception of class A I-frames . 49 9.2.3.5 Receiving acknowledgements . 49 9.2.3.6 Waiting for acknowledgement . 49 9.2.3.7 Release of class A operation . 50 9.2.3.8 Re-establishment of class A operation . 50 9.2.4 Establishing class B multiple frame operation . 50 9.2.4.1 Overview . 50 9.2.4.2 Class B multiple frame establishment procedures . 51 9.2.4.3 Class B LLN assignment procedures . 52 9.2.4.3.1 PT establishment . 52 9.2.4.3.2 FT establishment . 53 9.2.5 Link maintenance and information transfer in class B multiple frame operation . 53 9.2.5.1 Transmitting I-frames. 53 9.2.5.2 Receiving I-frames . 54 9.2.5.2.1 P bit set to 1 . 54 9.2.5.2.2 P bit set to 0 . 54 9.2.5.3 Sending and receiving acknowledgements . 54 9.2.5.3.1 Sending acknowledgements . 54 9.2.5.3.2 Receiving acknowledgements . 54 9.2.5.4 Receiving REJ-frames . 55 9.2.5.5 Receiving RNR-frames . 56 9.2.5.6 LAPC own receiver busy condition . 57 9.2.5.7 Waiting acknowledgement . 57 9.2.5.8 Appropriate supervisory frame. 58 9.2.6 Release of class B multiple frame operation . 58 9.2.7 Link suspension and resumption . 59 9.2.7.1 Link suspension . 59 9.2.7.1.1 Class B acknowledged suspend . 59 9.2.7.1.2 Unacknowledged suspend . 60 9.2.7.2 Class B link resumption . 61 9.2.7.3 Connection handover . 62 9.2.7.3.1 Class A connection handover . 63 9.2.7.3.2 Class B connection handover . 64 9.2.7.3.3 Expiry of connection handover timer . 64 9.2.8 Re-establishment of class B multi-frame operation . 64 9.2.8.1 Criteria for re-establishment. 64 9.2.8.2 Procedure . 65 9.2.9 Exception handling . 65 9.2.9.1 General . 65 9.2.9.2 Class B exception condition reporting and recovery . 66 9.2.9.2.1 N(S) sequence error . 66 9.2.9.2.2 N(R) sequence error . 66 9.2.9.2.3 Timer recovery condition . 66 9.2.9.2.4 Collision of identical transmitted and received commands . 66 9.3 Unacknowledged operation . 67 9.3.1 Use of LLN for unacknowledged information transfer . 67 9.3.2 Class U link establishment . 67 9.3.3 Unacknowledged information transfer . 67 9.3.3.1 Transmission of unacknowledged information . 67 9.3.3.2 Reception of unacknowledged information . 67 9.3.4 Unacknowledged release . 67 9.4 Broadcast operation . 67 9.4.1 Normal operation . 67 9.4.1.1 Procedure in the Fixed radio Termination (FT) . 67 9.4.1.2 Procedure in the Portable radio Termination (PT) . 68 9.4.2 Expedited operation . 68 9.4.2.1 Procedure in the Fixed radio Termination (FT) . 68 9.4.2.2 Procedure in the Portable radio Termination (PT) . 68 9.5 MAC layer interfaces . 69 9.5.1 MC-SAP . 69 9.5.1.1 C-plane overview . 69 SIST EN 300 175-4 V2.5.1:2013
ETSI ETSI EN 300 175-4 V2.5.1 (2013-08) 6 9.5.1.2 C-plane service data procedures . 69 9.5.1.3 U-plane service data . 70 9.5.2 MB-SAP . 70 9.5.2.1 C-plane service data procedures . 70 9.5.2.2 U-plane service data . 70 9.5.3 MA-SAP . 71 9.5.3.1 Overview . 71 9.5.3.2 Service data procedures . 71 10 Management procedures. 71 10.1 Lower Layer Management Entity (LLME) . 71 10.2 MAC connection management . 72 10.2.1 MAC connection set-up . 72 10.2.2 MAC connection release . 72 10.2.3 MAC connection modification . 72 10.2.4 MAC connection identifiers . 73 10.2.4.1 Overview . 73 10.2.4.2 Advanced MAC Connection Identifiers (AMCI) . 73 10.2.4.3 Basic MAC Connection Identifiers (BMCI) . 74 10.2.4.4 MAC Connection Endpoint Identifier (MCEI) . 74 10.2.5 Selection of logical channel (CS or CF) . 74 10.3 DLC C-plane (LAPC) management . 75 10.3.1 Provision of link signature . 75 10.3.2 Routing of connection oriented links . 75 10.3.3 Routing of connectionless links . 76 10.4 DLC U-plane (LUX) management . 76 10.4.1 U-plane establishment. 76 10.4.2 U-plane release . 76 10.4.3 U-plane suspend and resume . 76 10.5 Connection handover management . 77 10.6 Ciphering management . 77 10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure . 77 10.6.1.1 Providing a key to the MAC layer . 77 10.6.1.2 Starting and stopping the ciphering . 78 10.6.1.3 Connection handover . 78 10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM procedure . 78 10.7 Broadband data link management . 78 11 U-plane service characteristics . 79 11.1 General . 79 11.2 LU1 TRansparent UnProtected service (TRUP) . 79 11.3 LU2 Frame RELay service (FREL). 80 11.3.1 General . 80 11.3.2 Checksum operation . 81 11.3.3 Segmentation and transmission class . 81 11.3.4 Data transmission . 82 11.3.4.1 Send side procedure . 82 11.3.4.2 Receive side procedure . 82 11.4 LU3 Frame SWItching service (FSWI) . 83 11.5 LU4 Forward Error Correction (FEC) service. 83 11.6 LU5 Basic RATe adaption service (BRAT) . 84 11.6.1 Overview . 84 11.6.2 Protected service operation . 85 11.6.2.1 General . 85 11.6.2.2 Data buffering and initial rate adaptation . 85 11.6.2.3 Multi-channel set multiplexing . 86 11.6.2.4 Segmentation of Multiplexed Data Units (MDU) . 87 11.6.2.5 Frame sequencing and addition of control and fill octets . 88 11.6.2.6 Frame transmission . 89 11.6.3 Unprotected service operation . 90 11.6.3.1 General . 90 SIST EN 300 175-4 V2.5.1:2013
ETSI ETSI EN 300 175-4 V2.5.1 (2013-08) 7 11.6.3.2 Data buffering and initial rate adaption . 90 11.6.3.3 Multi-channel set multiplexing . 90 11.6.3.4 Segmentation of MDUs . 92 11.6.3.5 Frame transmission . 92 11.7 LU6 Secondary RATe adaption (SRAT) service . 92 11.7.1 General . 92 11.8 LU16 ESCape Service (ESC) . 93 11.8.1 General . 93 11.9 LU7 64 kbit/s data bearer service . 94 11.9.1 General . 94 11.9.2 Physical layer service. 94 11.9.3 MAC layer service . 94 11.9.4 DLC layer service . 94 11.9.4.1 Architectural model . 94 11.9.4.1.1 Transmit (Tx) frame buffering . 95 11.9.4.1.2 Receive (Rx) frame buffering . 95 11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC) . 95 11.9.4.2.1 Control field . 96 11.9.4.2.2 Information field . 98 11.9.4.2.3 ARQ checksum . 99 11.9.4.3 Procedures for normal operation . 99 11.9.4.3.1 Establishment and synchronization procedures . 99 11.9.4.3.2 Active phase . 101 11.9.4.3.3 Release. 103 11.9.4.4 Exceptional procedures . 103 11.9.4.4.1 Invalid frame condition . 103 11.9.4.4.2 Establishment . 103 11.9.4.4.3 Transmitting frames . 103 11.9.4.4.4 Receiving frames . 103 11.9.4.4.5 Sending acknowledgements . 104 11.9.4.4.6 Forwarding of received data . 104 11.9.4.4.7 N(R) sequence error . 104 11.9.4.4.8 N(O) sequence error . 104 11.9.4.4.9 N(S) sequence error . 105 11.9.4.4.10 Format error . 105 11.9.4.4.11 Abnormal release . 105 11.9.4.4.12 Implicit reset . 105 11.9.5 Network layer service . 105 11.9.5.1 L
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ETSI EN 300 175-4 V2.5.1 (2013-08) is a standard published by the European Telecommunications Standards Institute (ETSI). Its full title is "Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer". This standard covers: REN/DECT-000268-4
REN/DECT-000268-4
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