SIST EN 300 175-4 V2.3.1:2010
(Main)Digital Enhanced Cordless Telecommunications (DECT) - Common Interface (CI) - Part 4: Data Link Control (DLC) layer
- 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.
- Status
- Published
- Publication Date
- 08-Sep-2010
- Technical Committee
- MOC - Mobile Communications
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 11-Aug-2010
- Due Date
- 16-Oct-2010
- Completion Date
- 09-Sep-2010
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ETSI EN 300 175-4 V2.3.0 (2010-02) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
ETSI EN 300 175-4 V2.3.1 (2010-06) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
SIST EN 300 175-4 V2.3.1:2010 is the ETSI part of the DECT Common Interface that specifies the Data Link Control (DLC) layer. It defines how the DLC layer carries DECT signalling on the Control plane (C-plane) and user information on the User plane (U-plane) between the Medium Access Control (MAC) layer and the Network (NWK) layer.
What does SIST EN 300 175-4 V2.3.1:2010 specify?
SIST EN 300 175-4 V2.3.1:2010 specifies the DLC layer of the Digital Enhanced Cordless Telecommunications (DECT) Common Interface, which is layer 2b of the DECT protocol stack. It covers both the C-plane, used mainly for signalling and broadcast, and the U-plane, used for end-to-end user information.
The document is organized into an overview of the DLC layer, C-plane service characteristics, C-plane frame structures and procedures, primitives, management procedures, U-plane service characteristics, and U-plane frame structures. In practice, that means the standard tells implementers how DLC links are identified, framed, controlled, managed, and delivered to upper and lower layers.
What are the key requirements of SIST EN 300 175-4 V2.3.1:2010?
SIST EN 300 175-4 V2.3.1:2010 splits DLC operation into two planes. The C-plane provides reliable point-to-point delivery of Network (NWK) layer messages and a separate broadcast service Lb, while the U-plane carries user data through several independent services with different delay and protection profiles. This separation matters because signalling and user traffic are handled with different link behaviors.
- Clause 6 and clause 7 define the C-plane frame structure and field coding. Frames use address, control, length indicator, fill, and checksum fields, and invalid frames are discarded without notification. In practice, receivers must reject bad frames silently and rely on higher-layer recovery.
- Clause 7.3 defines the addressing and link identifiers. SAPI selects the service access point, LLN identifies the LAPC entity, and DLI and DLEI combine LLN with MAC connection information. This is what lets an implementation route each frame to the correct logical link.
- Clause 7.11 defines the command and response set: I, RR, RNR, REJ, SABM, DM, UI, DISC and UA. These cover acknowledged transfer, busy handling, retransmission, re-establishment, disconnect, and unacknowledged transfer.
- Clause 9 defines the operating procedures for class A, class B, class U, and broadcast operation. It covers link establishment, release, suspension, resumption, connection handover, and exception handling. That is the part implementers use to decide when to acknowledge, retransmit, pause, or restart a link.
- Clauses 8 and 10 define primitives and management procedures. They include DL_ESTABLISH, DL_DATA, DL_UNIT_DATA, broadcast primitives, MAC connection management, routing, and ciphering management. These are the interfaces used to connect DLC to MAC, NWK, and the interworking unit.
- Clauses 11 and 12 define the U-plane services and frame types. They include LU1 TRUP, LU2 FREL, LU3 FSWI, LU4 FEC, LU5 BRAT, LU7, LU10 EFREL, and LU16 ESC, together with FU1, FU2, FU3, FU4, FU5, FU6 and FU10 frame structures. In practice, these clauses tell a designer how much protection, delay, buffering, sequencing, and segmentation each bearer type provides.
What terms does SIST EN 300 175-4 V2.3.1:2010 define?
- Digital Enhanced Cordless Telecommunications (DECT): the cordless telecommunications system whose Common Interface is standardized here.
- Data Link Control (DLC): the DECT layer between MAC and NWK that carries signalling and user data.
- Control plane (C-plane): the DLC plane for signalling, reliable point-to-point transfer, and broadcast Lb.
- User plane (U-plane): the DLC plane for end-to-end user information and application-dependent services.
- Link Access Protocol C-plane (LAPC): the C-plane protocol entity that handles C-plane link procedures.
- Lower Layer Management Entity (LLME): the management entity that controls MAC connection and DLC management functions.
- Service Access Point Identifier (SAPI): the field that selects the higher-layer service associated with a frame.
- Logical Link Number (LLN): the number that identifies a LAPC instance for a given link.
Who uses SIST EN 300 175-4 V2.3.1:2010?
SIST EN 300 175-4 V2.3.1:2010 is used by DECT terminal, base station, chipset, and protocol engineers who implement the DLC layer. It is also used by interworking unit developers who map DECT services to other data systems.
Quality teams and test labs use it to verify frame formats, link setup and release, retransmission behavior, broadcast handling, and error handling. Buyers and system integrators use it to check whether a device supports the DECT link service they need for signalling, speech, or data.
Which standards are used with SIST EN 300 175-4 V2.3.1:2010?
- EN 300 175-1 - DECT overview and shared definitions.
- EN 300 175-2 - the DECT Physical Layer (PHL).
- EN 300 175-3 - the Medium Access Control (MAC) layer and lower-layer primitives.
- EN 300 175-5 - the Network (NWK) layer and higher-layer information mapping.
- EN 300 175-6 - identities and addressing.
- EN 300 175-8 - speech and audio coding and transmission.
- EN 301 649 - DECT Packet Radio Service (DPRS).
- ITU-T Q.920 and Q.921 - link-layer conventions used for C-plane field handling.
- ITU-T V.42 and V.110 - data procedures and support for data terminal equipment.
- ITU-T X.200 and X.210 - OSI service and layering terminology.
- ISO/IEC 8073 - the checksum basis used for the link signature calculation.
What does the SIST EN 300 175-4 V2.3.1:2010 document contain?
SIST EN 300 175-4 V2.3.1:2010 contains detailed bit-field definitions, frame layouts, and state procedures for DLC operation. It describes the coding of C-plane addresses and control fields, the primitive set between DLC, MAC, NWK, and the interworking unit, and the management actions for connections, routing, ciphering, and handover.
For the U-plane, it gives service-specific procedures for buffering, segmentation, rate adaptation, retransmission, and integrity handling across several bearer types. The document uses tables and figures to define frame sizes, channel mappings, control octets, sequence handling, and transmission behavior in a way that implementers can turn into protocol logic and conformance tests.
Buy Documents
ETSI EN 300 175-4 V2.3.0 (2010-02) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
ETSI EN 300 175-4 V2.3.1 (2010-06) - Digital Enhanced Cordless Telecommunications (DECT); Common Interface (CI); Part 4: Data Link Control (DLC) layer
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Frequently Asked Questions
SIST EN 300 175-4 V2.3.1:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital Enhanced Cordless Telecommunications (DECT) - Common Interface (CI) - Part 4: Data Link Control (DLC) layer". This standard covers: 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.
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.
SIST EN 300 175-4 V2.3.1:2010 is classified under the following ICS (International Classification for Standards) categories: 33.070.30 - Digital Enhanced Cordless Telecommunications (DECT); 35.100.20 - Data link layer. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 175-4 V2.3.1:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
Final draft ETSI EN 300 175-4 V2.3.0 (2010-02)
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 V2.3.0 (2010-02)
Reference
REN/DECT-000254-4
Keywords
DECT, IMT-2000, mobility, radio, TDD, TDMA
ETSI
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ETSI
3 Final draft ETSI EN 300 175-4 V2.3.0 (2010-02)
Contents
Intellectual Property Rights . 11
Foreword . 11
1 Scope . 12
2 References . 13
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) . 21
5 C-plane service characteristics . 21
5.1 Data link service (LAPC+Lc) . 21
5.1.1 General . 21
5.1.2 LAPC types of operation . 22
5.1.3 Establishment of information transfer modes . 22
5.1.3.1 Data Link Identifier (DLI) . 22
5.1.3.2 LAPC states. 22
5.2 Broadcast service (Lb) . 23
6 Frame structures for C-plane services . 24
6.1 Data link service frame structure . 24
6.1.1 General frame structure . 24
6.1.2 Lc frame delimiting and transparency . 25
6.1.3 Transmission order . 25
6.1.4 Routing to logical channels . 25
6.1.4.1 C /CL logical channel . 25
F F
6.1.4.2 C /CL logical channel . 26
S S
6.1.5 Invalid frames . 26
6.2 Broadcast service frame structure. 27
6.2.1 Standard frame structure . 27
6.2.2 Extended frame structure . 27
7 Elements of procedures and formats of fields for C-plane peer-to-peer communication . 28
7.1 General . 28
7.2 Address field formats . 28
7.3 Address field parameters . 28
7.3.1 REServed bit (RES) . 28
7.3.2 Command Response (C/R) bit . 28
7.3.3 SAPI field . 28
7.3.4 New Link Flag (NLF) bit . 29
7.3.5 LLN-field . 29
7.3.6 Data Link Identifiers (DLI) . 29
7.4 Control field formats . 30
7.5 Control field parameters . 30
7.5.1 Poll/Final (P/F) bit . 30
7.5.2 Multiple frame operation variables and sequence numbers . 30
7.5.2.1 Modulus . 30
7.5.2.2 Send state Variable V(S) . 30
7.5.2.3 Acknowledge state Variable V(A) . 31
7.5.2.4 Send sequence Number N(S) . 31
ETSI
4 Final draft ETSI EN 300 175-4 V2.3.0 (2010-02)
7.5.2.5 Receive state Variable V(R) . 31
7.5.2.6 Receive sequence Number N(R) . 31
7.5.3 Unacknowledged operation variables and sequence numbers . 31
7.5.4 Supervisory and Unnumbered function bits S and U . 31
7.6 Length indicator field format. 31
7.7 Length indicator field parameters . 32
7.7.1 Length indicator field extension bit (N) . 32
7.7.2 More data bit (M) . 32
7.7.3 Length parameter (L ) . 32
I
7.7.4 Extended length parameter (L ) . 33
JJ
7.7.5 Reserved bit (RES) . 33
7.8 Fill field format . 33
7.9 Checksum field format . 33
7.10 Checksum field parameters . 33
7.11 Commands and responses . 35
7.11.1 Information (I) command . 35
7.11.2 Receive Ready (RR) command/response . 35
7.11.3 Receive Not Ready (RNR) command/response . 36
7.11.4 REJect (REJ) command/response . 36
7.11.5 Set Asynchronous Balanced Mode (SABM) command . 36
7.11.6 Disconnect Mode (DM) response . 36
7.11.7 Unnumbered Information (UI) command . 36
7.11.8 DISConnect (DISC) command . 37
7.11.9 Unnumbered ACK (UA) response . 37
8 Primitives . 37
8.1 Primitive types . 37
8.2 Primitives to the MAC layer (lower layer) . 37
8.3 Primitives to the NWK layer (higher layer) . 37
8.3.1 Parameter definitions . 38
8.3.2 S-SAP primitives . 39
8.3.2.1 DL_ESTABLISH primitive . 39
8.3.2.2 DL_RELEASE primitive . 39
8.3.2.3 DL_DATA primitive . 40
8.3.2.4 DL_UNIT_DATA primitive . 40
8.3.2.5 DL_SUSPEND primitive . 40
8.3.2.6 DL_RESUME primitive . 40
8.3.2.7 DL_ENC_KEY primitive . 41
8.3.2.8 DL_ENCRYPT primitive . 41
8.3.2.9 DL_SERVICE_MOD primitive . 41
8.3.3 B-SAP primitives . 41
8.3.3.1 DL_BROADCAST primitive . 42
8.3.3.2 DL_EXPEDITED primitive . 42
8.4 Primitives to the interworking unit . 42
8.4.1 Parameter definitions . 42
8.4.2 LU -SAP primitives . 43
X
8.4.2.1 DL_U_DATA primitive . 43
8.4.2.2 DL_U_UNIT_DATA primitive . 43
8.4.2.3 DL_U_ERROR primitive . 43
9 C-plane peer-to-peer procedures . 44
9.1 General . 44
9.2 Point to point acknowledged operation . 44
9.2.1 Procedure for the use of the P/F bit . 44
9.2.1.1 Class A acknowledged information transfer . 44
9.2.1.2 Class B acknowledged information transfer . 45
9.2.2 Use of LLN . 45
9.2.2.1 Class A operation . 45
9.2.2.2 Class B operation . 45
9.2.3 Link establishment and information transfer in class A operation . 45
9.2.3.1 Establishing class A operation . 45
9.2.3.2 Class A acknowledged information transfer . 46
ETSI
5 Final draft ETSI EN 300 175-4 V2.3.0 (2010-02)
9.2.3.3 Transmission of class A I-frames . 46
9.2.3.4 Reception of class A I-frames . 47
9.2.3.5 Receiving acknowledgements . 47
9.2.3.6 Waiting for acknowledgement . 47
9.2.3.7 Release of class A operation . 48
9.2.3.8 Re-establishment of class A operation . 48
9.2.4 Establishing class B multiple frame operation . 48
9.2.4.1 Overview . 48
9.2.4.2 Class B multiple frame establishment procedures . 49
9.2.4.3 Class B LLN assignment procedures . 50
9.2.4.3.1 PT establishment . 50
9.2.4.3.2 FT establishment . 51
9.2.5 Link maintenance and information transfer in class B multiple frame operation . 51
9.2.5.1 Transmitting I-frames. 51
9.2.5.2 Receiving I-frames . 52
9.2.5.2.1 P bit set to 1 . 52
9.2.5.2.2 P bit set to 0 . 52
9.2.5.3 Sending and receiving acknowledgements . 52
9.2.5.3.1 Sending acknowledgements . 52
9.2.5.3.2 Receiving acknowledgements . 52
9.2.5.4 Receiving REJ-frames . 53
9.2.5.5 Receiving RNR-frames . 54
9.2.5.6 LAPC own receiver busy condition . 55
9.2.5.7 Waiting acknowledgement . 55
9.2.5.8 Appropriate supervisory frame. 56
9.2.6 Release of class B multiple frame operation . 56
9.2.7 Link suspension and resumption . 57
9.2.7.1 Link su sp ension . 57
9.2.7.1.1 Class B acknowledged suspend . 57
9.2.7.1.2 Unacknowledged suspend . 58
9.2.7.2 Class B link resumption . 59
9.2.7.3 Connection handover . 60
9.2.7.3.1 Class A connection handover . 61
9.2.7.3.2 Class B connection handover . 62
9.2.7.3.3 Expiry of connection handover timer . 62
9.2.8 Re-establishment of class B multi-frame operation . 62
9.2.8.1 Criteria for re-establishment. 62
9.2.8.2 Procedure . 63
9.2.9 Exception handling . 63
9.2.9.1 General . 63
9.2.9.2 Class B exception condition reporting and recovery . 64
9.2.9.2.1 N(S) sequence error . 64
9.2.9.2.2 N(R) sequence error . 64
9.2.9.2.3 Timer recovery condition . 64
9.2.9.2.4 Collision of identical transmitted and received commands . 64
9.3 Unacknowledged operation . 65
9.3.1 Use of LLN for unacknowledged information transfer . 65
9.3.2 Class U link establishment . 65
9.3.3 Unacknowledged information transfer . 65
9.3.3.1 Transmission of unacknowledged information . 65
9.3.3.2 Reception of unacknowledged information . 65
9.3.4 Unacknowledged release . 65
9.4 Broadcast operation . 66
9.4.1 Normal operation . 66
9.4.1.1 Procedure in the Fixed radio Termination (FT) . 66
9.4.1.2 Procedure in the Portable radio Termination (PT) . 66
9.4.2 Expedited operation . 66
9.4.2.1 Procedure in the Fixed radio Termination (FT) . 66
9.4.2.2 Procedure in the Portable radio Termination (PT) . 66
9.5 MAC layer interfaces . 67
9.5.1 MC-SAP . 67
9.5.1.1 C-plane overview . 67
ETSI
6 Final draft ETSI EN 300 175-4 V2.3.0 (2010-02)
9.5.1.2 C-plane service data procedures . 67
9.5.1.3 U-plane service data . 68
9.5.2 MB-SAP . 68
9.5.2.1 C-plane service data procedures . 68
9.5.2.2 U-plane service data . 68
9.5.3 MA-SAP . 69
9.5.3.1 Overview . 69
9.5.3.2 Service data procedures . 69
10 Management procedures. 69
10.1 Lower Layer Management Entity (LLME) . 69
10.2 MAC connection management . 70
10.2.1 MAC connection set-up . 70
10.2.2 MAC connection release . 70
10.2.3 MAC connection modification . 70
10.2.4 MAC connection identifiers . 71
10.2.4.1 Overview . 71
10.2.4.2 Advanced MAC Connection Identifiers (AMCI) . 71
10.2.4.3 Basic MAC Connection Identifiers (BMCI) . 72
10.2.4.4 MAC Connection Endpoint Identifier (MCEI) . 72
10.2.5 Selection of logical channel (C or C ) . 72
S F
10.3 DLC C-plane (LAPC) management . 73
10.3.1 Provision of link signature . 73
10.3.2 Routing of connection oriented links . 73
10.3.3 Routing of connectionless links . 74
10.4 DLC U-plane (LUX) management . 74
10.4.1 U-plane establishment. 74
10.4.2 U-plane release . 74
10.4.3 U-plane suspend and resume . 74
10.5 Connection handover management . 75
10.6 Ciphering management . 75
10.6.1 Ciphering management in cases where the NWK layer executes the ciphering related MM procedure . 75
10.6.1.1 Providing a key to the MAC layer . 75
10.6.1.2 Starting and stopping the ciphering . 76
10.6.1.3 Connection handover . 76
10.6.2 Ciphering management in cases where the NWK layer does not execute the ciphering related MM
procedure . 76
10.7 Broadband data link management . 76
11 U-plane service characteristics . 77
11.1 General . 77
11.2 LU1 TRansparent UnProtected service (TRUP) . 77
11.3 LU2 Frame RELay service (FREL). 78
11.3.1 General . 78
11.3.2 Checksum operation . 79
11.3.3 Segmentation and transmission class . 79
11.3.4 Data transmission . 80
11.3.4.1 Send side procedure . 80
11.3.4.2 Receive side procedure . 80
11.4 LU3 Frame SWItching service (FSWI) . 81
11.5 LU4 Forward Error Correction (FEC) service. 81
11.6 LU5 Basic RATe adaption service (BRAT) . 82
11.6.1 Overview . 82
11.6.2 Protected service operation . 83
11.6.2.1 General . 83
11.6.2.2 Data buffering and initial rate adaptation . 83
11.6.2.3 Multi-channel set multiplexing . 84
11.6.2.4 Segmentation of Multiplexed Data Units (MDU) . 85
11.6.2.5 Frame sequencing and addition of control and fill octets . 86
11.6.2.6 Frame transmission . 87
11.6.3 Unprotected service operation . 88
11.6.3.1 General . 88
ETSI
7 Final draft ETSI EN 300 175-4 V2.3.0 (2010-02)
11.6.3.2 Data buffering and initial rate adaption . 88
11.6.3.3 Multi-channel set multiplexing . 88
11.6.3.4 Segmentation of MDUs . 90
11.6.3.5 Frame transmission . 90
11.7 LU6 Secondary RATe adaption (SRAT) service . 90
11.7.1 General . 90
11.8 LU16 ESCape Service (ESC) . 91
11.8.1 General . 91
11.9 LU7 64 kbit/s data bearer service . 92
11.9.1 General . 92
11.9.2 Physical layer service. 92
11.9.3 MAC layer service . 92
11.9.4 DLC layer service . 92
11.9.4.1 Architectural model . 92
11.9.4.1.1 Transmit (Tx) frame buffering . 93
11.9.4.1.2 Receive (Rx) frame buffering . 93
11.9.4.2 Automatic-Repeat-Request (ARQ) and Forward Error Control (FEC) . 93
11.9.4.2.1 Control field . 94
11.9.4.2.2 Information field . 96
11.9.4.2.3 ARQ chec ksum . 97
11.9.4.3 Procedures for normal operation . 97
11.9.4.3.1 Establishment and synchronization procedures . 97
11.9.4.3.2 Active phase . 99
11.9.4.3.3 Release. 101
11.9.4.4 Exceptional procedures . 101
11.9.4.4.1 Invalid frame condition . 101
11.9.4.4.2 Establishment . 101
11.9.4.4.3 Transmitting frames . 101
11.9.4.4.4 Receiving frames . 101
11.9.4.4.5 Sending acknowledgements . 102
11.9.4.4.6 Forwarding of received data . 102
11.9.4.4.7 N(R) sequence error . 102
11.9.4.4.8 N(O) sequence error . 102
11.9.4.4.9 N(S) sequence error . 103
11.9.4.4.10 Format error . 103
11.9.4.4.11 Abnormal release . 103
11.9.4.4.12 Implicit reset .
...
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 V2.3.1 (2010-06)
Reference
REN/DECT-000254-4
Keywords
DECT, 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:
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The present document may be made available in more than one electronic version or in print. In any case of existing or
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In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
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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
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If you find errors in the present document, please send your comment to one of the following services:
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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 2010.
All rights reserved.
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DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
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3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
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GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 175-4 V2.3.1 (2010-06)
Contents
Intellectual Property Rights . 11
Foreword . 11
1 Scope . 12
2 References . 13
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
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4 ETSI EN 300 175-4 V2.3.1 (2010-06)
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 ETSI EN 300 175-4 V2.3.1 (2010-06)
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 su sp ension . 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 ETSI EN 300 175-4 V2.3.1 (2010-06)
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 ETSI EN 300 175-4 V2.3.1 (2010-06)
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 chec ksum . 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 servi
...
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 2.3.1SIST EN 300 175-4 V2.3.1:2010en01-oktober-2010SIST EN 300 175-4 V2.3.1:2010SLOVENSKI
STANDARD
ETSI ETSI EN 300 175-4 V2.3.1 (2010-06) 2
Reference REN/DECT-000254-4 Keywords DECT, 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 2010. 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. LTE™ is a Trade Mark of ETSI currently being 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 V2.3.1:2010
ETSI ETSI EN 300 175-4 V2.3.1 (2010-06) 3 Contents Intellectual Property Rights . 11 Foreword . 11 1 Scope . 12 2 References . 13 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 V2.3.1:2010
ETSI ETSI EN 300 175-4 V2.3.1 (2010-06) 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 V2.3.1:2010
ETSI ETSI EN 300 175-4 V2.3.1 (2010-06) 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 V2.3.1:2010
ETSI ETSI EN 300 175-4 V2.3.1 (2010-06) 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 V2.3.1:2010
ETSI ETSI EN 300 175-4 V2.3.1 (2010-06) 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
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