ETSI TS 144 006 V13.0.0 (2016-01)

ETSI TS 1144 006 V13.0.0 (201616-01)






TECHNICAL SPECIFICATIONION
Digital cellular telecocommunications system (Phahase 2+);
Mobile Station - Base e Station System (MS - BSS)) interface; i
Data Linknk (DL) layer specification
(3GPP TS 44.0.006 version 13.0.0 Release 13 13)

R
GLOBAL SYSTTEME FOR
MOBILE COMMUUNNICATIONS

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3GPP TS 44.006 version 13.0.0 Release 13 1 ETSI TS 144 006 V13.0.0 (2016-01)



Reference
RTS/TSGG-0244006vd00
Keywords
GSM
ETSI
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3GPP TS 44.006 version 13.0.0 Release 13 2 ETSI TS 144 006 V13.0.0 (2016-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 44.006 version 13.0.0 Release 13 3 ETSI TS 144 006 V13.0.0 (2016-01)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 7
1 Scope . 8
2 References . 8
3 Abbreviations . 8
4 General . 9
4.1 Options . 9
5 Frame structure for peer-to-peer communication . 10
5.1 General . 10
5.2 Frame delimitation and fill bits . 12
5.3 Address field . 12
5.4 Control field . 13
5.5 Length indicator field . 13
5.5a Short L2 header type 1 . 13
5.6 Information field . 13
5.7 Transparency . 13
5.8 Format convention . 13
5.8.1 Numbering convention . 13
5.8.2 Order of bit transmission . 13
5.8.3 Field mapping convention . 13
6 Elements of procedures and formats of fields for Data Link Layer peer-to-peer communication . 14
6.1 General . 14
6.2 Address field format . 14
6.3 Address field variables . 15
6.3.1 Address field extension bit (EA) . 15
6.3.2 Command/response field bit (C/R) . 15
6.3.3 Service access point identifier (SAPI) . 15
6.4 Control field formats . 15
6.4.1 Information transfer format - I . 15
6.4.2 Supervisory format - S . 16
6.4.3 Unnumbered format - U . 16
6.4a Short L2 header type 1 . 16
6.5 Control field parameters and associated state variables . 16
6.5.1 Poll/Final bit . 16
6.5.2 Multiple frame operation - variables and sequence numbers . 17
6.5.2.1 Modulus . 17
6.5.2.2 Send state variable V(S) . 17
6.5.2.3 Acknowledge state variable V(A) . 17
6.5.2.4 Send sequence number N(S) . 17
6.5.2.5 Receive state variable V(R). 17
6.5.2.6 Receive sequence number N(R) . 17
6.5.2.7 Other parameters and variables . 18
6.5.3 Unacknowledged operation variables and parameters . 18
6.6 Length indicator field format. 18
6.7 Length indicator field variables . 18
6.7.1 Length indicator field extension bit (EL) . 18
6.7.2 More data bit (M) . 18
6.7.3 Length indicator (L) . 18
6.8 Commands and responses . 19
ETSI

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3GPP TS 44.006 version 13.0.0 Release 13 4 ETSI TS 144 006 V13.0.0 (2016-01)
6.8.1 Information (I) commands . 19
6.8.2 Set asynchronous balanced mode (SABM) command . 19
6.8.3 Disconnect (DISC) command . 20
6.8.4 Unnumbered information (UI) command . 20
6.8.5 Receive ready (RR) command/response . 20
6.8.6 Reject (REJ) command/response . 21
6.8.7 Receive not ready (RNR) command/response . 21
6.8.8 Unnumbered acknowledgement (UA) response . 21
6.8.9 Disconnected mode (DM) response . 21
7 Elements for layer-to-layer communication . 22
7.1 Definition of primitives and parameters . 22
7.1.1 Generic names . 22
7.1.1.1 DL-ESTABLISH . 22
7.1.1.2 DL-RELEASE . 22
7.1.1.3 DL-DATA . 22
7.1.1.4 DL-UNIT DATA . 22
7.1.1.5 DL-SUSPEND . 22
7.1.1.6 DL-RESUME . 22
7.1.1.7 DL-RECONNECT . 23
7.1.1.8 DL-RANDOM ACCESS . 23
7.1.1.9 MDL-RELEASE . 23
7.1.1.10 MDL-ERROR . 23
7.1.1.11 PH-DATA . 23
7.1.1.12 PH-RANDOM ACCESS . 23
7.1.1.13 PH-CONNECT . 23
7.1.1.14 PH-READY-TO-SEND . 23
7.1.1.15 PH-EMPT Y-FRAME . 23
7.1.2 Primitives types . 23
7.1.2.1 REQUEST . 24
7.1.2.2 INDICATION . 24
7.1.2.3 RESPONSE . 24
7.1.2.4 CONFIRM . 24
7.1.3 Parameter definition . 25
7.1.3.1 Message unit . 25
7.1.3.2 Channel type . 25
7.1.3.3 Service Access Point . 25
7.1.3.4 Release mode . 25
7.1.3.5 Error cause . 25
7.1.3.6 Establish mode . 26
7.1.3.7 L2 header type . 26
7.1.3.8 Priority . 26
7.2 Primitive procedures. 29
8 Definition of the peer-to-peer protocol LAPDm . 29
8.1 General . 29
8.2 General Protocol Procedures . 30
8.2.1 Unacknowledged information transfer . 30
8.2.2 Acknowledged multiple frame information transfer . 31
8.3 Procedures for unacknowledged information transfer . 31
8.3.1 General . 31
8.3.2 Transmission of unacknowledged information . 31
8.3.3 Receipt of unacknowledged information . 31
8.4 Procedures for establishment and release of multiple frame operation . 31
8.4.1 Establishment of multiple frame operation . 31
8.4.1.1 General . 31
8.4.1.2 Normal establishment procedures . 32
8.4.1.3 Procedure on expiry of timer T200: Normal establishment . 33
8.4.1.4 Contention resolution establishment procedure . 33
8.4.1.5 Procedure on expiry of timer T200: contention resolution (MS only) . 35
8.4.2 Information transfer . 35
8.4.2.1 General requirements . 35
ETSI

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3GPP TS 44.006 version 13.0.0 Release 13 5 ETSI TS 144 006 V13.0.0 (2016-01)
8.4.2.2 Error conditions . 35
8.4.2.3 Fill frames . 36
8.4.3 Suspension and resumption of multiple frame operation . 36
8.4.3.1 General . 36
8.4.3.2 Suspension . 37
8.4.3.3 Resumption . 37
8.4.3.3.1 Procedure after channel change . 37
8.4.3.3.2 Procedure after returning to the old channel (MS only) . 38
8.4.4 Termination of multiple frame operation . 38
8.4.4.1 General . 38
8.4.4.2 Normal release procedure . 38
8.4.4.3 Procedure on expiry of timer T200 for normal release . 39
8.4.4.4 Local end release procedure . 39
8.4.5 Idle state . 39
8.4.6 Collision of unnumbered commands and responses . 40
8.4.6.1 Identical transmitted and received commands . 40
8.4.6.2 Different transmitted and received commands . 40
8.4.6.3 Unsolicited DM response and SABM or DISC command . 40
8.5 Procedures for information transfer in multiple frame operation . 40
8.5.1 Transmitting I frames. 40
8.5.2 Receiving I frames . 41
8.5.2.1 P bit of the received I frame set to "1" . 41
8.5.2.2 P bit of the received I frame set to "0" . 41
8.5.3 Receiving acknowledgement . 42
8.5.3.1 On receipt of a valid I frame . 42
8.5.3.2 Receiving supervisory command frames with the P bit set to "1" . 42
8.5.4 Receiving REJ frames . 42
8.5.4.1 Receipt of a valid REJ frame. 42
8.5.4.2 Transmitting frames . 43
8.5.5 Receiving RNR frame . 43
8.5.6 Data link layer own receiver busy condition. 45
8.5.7 Waiting acknowledgement . 45
8.5.8 Preemption . 46
8.5.8.1 Sender Requirements . 46
8.5.8.2 Receiver Requirements . 46
8.6 Abnormal release and re-establishment of multiple frame operation . 46
8.6.1 Criteria for re-establishment . 46
8.6.2 Criteria for abnormal release . 46
8.6.3 Procedures for re-establishment . 47
8.6.4 Procedures for abnormal release . 47
8.7 Exception condition reporting and recovery for multiple frame operation . 47
8.7.1 N(S) sequence error . 47
8.7.2 Timer recovery . 48
8.7.3 Invalid frame condition . 48
8.7.4 N(R) sequence error . 48
8.8 List of system parameters . 49
8.8.1 Timer T200 . 49
8.8.1.1 For SAPI=0 and SAPI=3 . 49
8.8.1.2 For SAPIs other than 0 or 3 . 49
8.8.2 Maximum number of retransmissions (N200) .
...