1、ETSI EN 300 938 V8.0.1 (2000-09) European Standard (Telecommunications series) Digital cellular telecommunications system (Phase 2+); Mobile Station - Base Station System (MS - BSS) interface; Data Link (DL) layer specification (GSM 04.06 version 8.0.1 Release 1999) COPYRIGHT European Telecommunicat
2、ions Standards InstituteLicensed by Information Handling Services(GSM 04.06 version 8.0.1 Release 1999) 2 ETSI EN 300 938 V8.0.1 (2000-09) Reference REN/SMG-O20406Q8 Keywords Digital cellular telecommunications system, Global System for Mobile communications (GSM) ETSI 650 Route des Lucioles F-O6921
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7、tandards Institute 2000. All rights reserved. ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services(GSM 04.06 version 8.0.1 Release 1999) 3 ETSI EN 300 938 V8.0.1 (2000-09) Contents Intellectual Property Rights 7 Foreword . 7 O Scope 8 0.1 References
8、 8 0.2 Abbreviations . 8 1 General . 9 1.1 Options . 9 2 2.1 2.2 2.3 2.4 2.5 2.5a 2.6 2.7 2.8 2.8.1 2.8.2 2.8.3 Frame structure for peer-to-peer communication . 10 General . 10 Frame delimitation and fill bits 12 Address field 12 Control field . 13 Length indicator field . 13 Short L2 header type 1
9、. 13 Information field 13 Transparency 13 Format convention 13 Order of bit transmission 13 Field mapping convention 13 Numbering convention . 13 3 Elements of procedures and formats of fields for Data Link Layer peer-to-peer communication . 14 3.1 3.2 3.3 3.3.1 3.3.2 3.3.3 3.4 3.4.1 3.4.2 3.4.3 3.4
10、a 3.5 3.5.1 3.5.2 3.5.2.1 3.5.2.2 3.5.2.3 3.5.2.4 3.5.2.5 3.5.2.6 3.5.2.7 3.5.3 3.6 3.7 3.7.1 3.7.2 3.7.3 3.8 3.8.1 3.8.2 3.8.3 3.8.4 3.8.5 General . 14 Address field format . 14 Address field variables . 15 Address field extension bit (EA) . 15 Commandresponse field bit (CR) . 15 Service access poi
11、nt identifier (SAPI) 15 Information transfer format - I 15 Supervisory format - S 16 Control field formats 15 Unnumbered format - U 16 Short L2 header type 1 . 16 Control field parameters and associated state variables . 16 PolUFinal bit . 16 Multiple frame operation - variables and sequence numbers
12、 17 Modulus 17 Send state variable V(S) 17 Acknowledge state variable V(A) . 17 Send sequence number N(S) . 17 Receive state variable V(R) . 17 Receive sequence number N(R) 17 Other parameters and variables . 18 Unacknowledged operation variables and parameters 18 Length indicator field variables 18
13、 Length indicator field extension bit (EL) 18 More data bit (M) 18 Length indicator (L) 18 Information (I) commands 19 Set asynchronous balanced mode (SABM) command 19 Disconnect (DISC) command . 20 Unnumbered information (UI) command . 20 Receive ready (RR) commandresponse . 20 Length indicator fie
14、ld format 18 Commands and responses 19 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services(GSM 04.06 version 8.0.1 Release 1999) 4 ETSI EN 300 938 V8.0.1 (2000-09) 3.8.6 3.8.7 3.8.8 3.8.9 4 Reject (REJ) commandresponse 21 Receive not ready (RNR) co
15、mmandresponse 21 Unnumbered acknowledgement (UA) response . 21 Disconnected mode (DM) response 21 Elements for layer-to-layer communication . 22 4.1 4.1.1 4.1.1.1 4.1.1.2 4.1.1.3 4.1.1.4 4.1.1.5 4.1.1.6 4.1.1.7 4.1.1.8 4.1.1.9 4.1.1.10 4.1.1.1 1 4.1.1.12 4.1.1.13 4.1.1.14 4.1.1.15 4.1.2 4.1.2.1 4.1.
16、2.2 4.1.2.3 4.1.2.4 4.1.3 4.1.3.1 4.1.3.2 4.1.3.3 4.1.3.4 4.1.3.5 4.1.3.6 4.1.3.7 4.1.3.8 4.2 Definition of primitives and parameters . 22 Generic names 22 DL-ESTABLISH 22 DL-RELEASE 22 DL-DATA . 22 DL-UNIT DATA 22 DL-SUSPEND 22 DL.RESUME 22 DL-RECONNECT 23 DL-RANDOM ACCESS 23 MDL-RELEASE . 23 MDL-E
17、RROR . 23 PH-DATA . 23 PH-RANDOM ACCESS 23 PH-CONNECT . 23 PH-READY-TO-SEND 23 PH.EMPTY.FRAME 23 Primitives types 23 REQUEST . 24 INDICATION . 24 RESPONSE . 24 CONFIRM 24 Parameter definition 25 Message unit . 25 Channel type . 25 Service Access Point . 25 Release mode 25 Error cause 25 Establish mo
18、de 26 L2 header type . 26 Priority 26 Primitive procedures . 30 5 Definition of the peer-to-peer protocol LAPDm 30 5.1 5.2 5.2.1 5.2.2 5.3 5.3.1 5.3.2 5.3.3 5.4 5.4.1 5.4.1.1 5.4.1.2 5.4.1.3 5.4.1.4 5.4.1.5 5.4.2 5.4.2.1 5.4.2.2 5.4.2.3 5.4.3 5.4.3.1 5.4.3.2 General . 30 General Protocol Procedures
19、31 Unacknowledged information transfer 31 Acknowledged multiple frame information transfer . 32 Procedures for unacknowledged information transfer 32 General 32 Transmission of unacknowledged information . 32 Receipt of unacknowledged information 32 Procedures for establishment and release of multip
20、le frame operation 32 Establishment of multiple frame operation . 32 General 32 Normal establishment procedures . 33 Procedure on expiry of timer T200: Normal establishment 34 Contention resolution establishment procedure 34 Procedure on expiry of timer T200: contention resolution (MS only) 36 Infor
21、mation transfer 36 General requirements 36 Error conditions . 36 Fill frames . 37 Suspension and resumption of multiple frame operation 38 General 38 Suspension 38 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services(GSM 04.06 version 8.0.1 Release
22、1999) ETSI EN 300 938 V8.0.1 (2000-09) 5.4.3.3 5.4.3.3.1 5.4.3.3.2 5.4.4 5.4.4.1 5.4.4.2 5.4.4.3 5.4.4.4 5.4.5 5.4.6 5.4.6.1 5.4.6.2 5.4.6.3 5.5 5.5.1 5.5.2 5.5.2.1 5.5.2.2 5.5.3 5.5.3.1 5.5.3.2 5.5.4 5.5.4.1 5.5.4.2 5.5.5 5.5.6 5.5.7 5.5.8 5.5.8.1 5.5.8.2 5.6 5.6.1 5.6.2 5.6.3 5.6.4 5.7 5.7.1 5.7.2
23、 5.7.3 5.7.4 5.8 5.8.1 5.8.1.1 5.8.1.2 5.8.2 5.8.2.1 5.8.2.2 5.8.3 5.8.4 5.8.5 5.9 Resumption . 39 Procedure after channel change . 39 Termination of multiple frame operation 40 Normal release procedure . 40 Procedure on expiry of timer T200 for normal release . 40 Idle state 41 Collision of unnumbe
24、red commands and responses . 41 Procedure after returning to the old channel (MS only) 39 General 40 Local end release procedure 41 Identical transmitted and received commands 41 Different transmitted and received commands 42 Procedures for information transfer in multiple frame operation . 42 Unsol
25、icited DM response and SABM or DISC command 42 Transmitting I frames 42 Receiving I frames 43 P bit of the received I frame set to “1“ 43 P bit of the received I frame set to “O“ 43 Receiving acknowledgement 44 On receipt of a valid I frame . 44 Receiving supervisory command frames with the P bit se
26、t to “1“ 44 Receiving REJ frames . 44 Receipt of a valid REJ frame . 44 Transmitting frames 45 Data link layer own receiver busy condition . 46 Receiving RNR frame . 45 Waiting acknowledgement . 47 Preemption 47 Sender Requirements 48 Receiver Requirements . 48 Abnormal release and re-establishment
27、of multiple frame operation . 48 Criteria for abnormal release 48 Procedures for re-establishment 49 Criteria for re-establishment . 48 Procedures for abnormal release . 49 Exception condition reporting and recovery for multiple frame operation 49 N(S) sequence error 49 Timer recovery 50 Invalid fra
28、me condition . 50 List of system parameters . 50 N(R) sequence error 50 Timer T200 . 51 For SAPI=O and SAPI=3 . 51 For SAPIs other than O or 3 . 51 Maximum number of retransmissions (N200) 51 For SAPI=O and 3 . 51 For SAPIs other than O or 3 . 51 Maximum number of outstanding I frames (k) . 52 Maxim
29、um number of octets in an I, UI, SABM and UA frame partially or entirely available for the information field (N201) 51 Maximum number of octets in a Layer 3 message . 52 System performance requirements . 52 6 Special protocol operation on SAPI=O and SAPI=3 53 Annex A (normative): A . 1 A . 1.1 A.1.2
30、 Random access procedures . 54 Description of the procedure 54 Procedure in the MS . 54 Procedure in the BS 54 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services(GSM 04.06 version 8.0.1 Release 1999) 6 ETSI EN 300 938 V8.0.1 (2000-09) A.2 Format 5
31、4 Annex G (normative): Handling of frames with parameter errors in the address. control and length indicator fields . 55 G.l General . 55 G.2 Parameter errors in the address field 55 G.2.1 Unallocated SAP1 . 55 G.2.2 Wrong value of the C/R bit 55 G.2.3 EA bit set to “O“ 55 G.3 Parameter errors in th
32、e control field . 56 G.3.1 Supervisory frames . 56 G.3.2 Unnumbered frames . 56 G.4 Parameter errors in the length indicator field . 56 G.4.1 EL bit error . 56 G.4.2 Information frames . 56 G.4.3 Supervisory frames . 57 G.4.4 DISC and DM frames . 57 G.4.5 SABM UA and U1 frames 57 Annex H (informativ
33、e): Change Request History 58 History 59 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Services(GSM 04.06 version 8.0.1 Release 1999) 7 ETSI EN 300 938 V8.0.1 (2000-09) Intellectual Property Rights IPRs essential or potentially essential to the presen
34、t 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 O00 3 14: “Intellectual Propero Rights (IPRs); Essential, or potentially Essential, IPRs notifed to ETSI in respe
35、ct of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (-). 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 refer
36、enced in ETSI SR O00 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (Telecommunications series) has been produced by ETSI Technical Committee Special Mobile Group (SMG). The present document defines
37、the data link layer protocol of the Mobile Station - Base Station System (MS - BSS) interface within the digital cellular telecommunications system. The contents of the present document is subject to continuing work within SMG and may change following formal SMG approval. Should SMG modify the conte
38、nts of the present document, it will be re-released with an identifying change of release date and an increase in version number as follows: Version 8.x.y where: 8 indicates Release 1999 of GSM Phase 2+. x the second digit is incremented for all changes of substance, i.e. technical enhancements, cor
39、rections, updates, etc. y the third digit is incremented when editorial only changes have been incorporated in the specification. The specification from which the present document has been derived was originally based on CEPT documentation, hence the presentation of the present document may not be e
40、ntirely in accordance with the ETSI drafting rules. Annexes B to F were deleted from the original specification, however, for referencing purposes the annex numbering has been maintained. National transposition dates Date of adoption of this EN: Date of latest announcement of this EN (doa): Date of
41、latest publication of new National Standard or endorsement of this EN (dop/e): Date of withdrawal of any conflicting National Standard (dow): 25 August 2000 30 November 2000 31 May 2001 31 May 2001 ETSI COPYRIGHT European Telecommunications Standards InstituteLicensed by Information Handling Service
42、s(GSM 04.06 version 8.0.1 Release 1999) 8 ETSI EN 300 938 V8.0.1 (2000-09) O Scope The present document defines a data link layer protocol to be used for signalling, and possibly also for other applications, on the MS-BS interface. o. 1 Ref e rences The following documents contain provisions which,
43、through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the late
44、st version applies. A non-specific reference to an ETS shall also be taken to refer to later versions published as an EN with the same number. For this Release 1999 document, references to GSM documents are for Release 1999 versions (version 8.x.y). il GSM O 1.04: “Digital cellular telecommunication
45、s system (Phase 2+); Abbreviations and acronyms“. GSM 04.01: “Digital cellular telecommunications system; Mobile Station - Base Station System (MS - BSS) interface; General aspects and principles“. GSM 04.03: “Digital cellular telecommunications system (Phase 2+); Mobile Station - Base Station Syste
46、m (MS - BSS) interface Channel structures and access capabilities“. GSM 04.04: “Digital cellular telecommunications system; Layer 1 General requirements“. GSM 04.05: “Digital cellular telecommunications system; Data Link (DL) layer General aspects“ Pl 31 41 Pl 61 GSM 04.07: “Digital cellular telecom
47、munications system (Phase 2+); Mobile radio interface signalling layer 3; General aspects“. GSM 04.08: “Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 specification“. GSM 04.10: “Digital cellular telecommunications system; Mobile radio interface layer 3 Supplem
48、entary services specification; General aspects“. VI SI PI GSM 04.12: “Digital cellular telecommunications system (Phase 2+); Short Message Service Cell Broadcast (SMSCB) support on the mobile radio interface“. GSM 05.02: “Digital cellular telecommunications system (Phase 2+); Multiplexing and multip
49、le access on the radio path“. GSM 08.56: “Digital cellular telecommunications system; Base Station Controller - Base Transceiver Station (BSC - BTS) interface; Layer 2 specification“. 101 i 11 I21 GSM 08.58: “Digital cellular telecommunications system (Phase 2+); Base Station Controller - Base Transceiver Station (BSC - BTS) interface; Layer 3 specification“. CCITT Recommendation Z. 100: “Specification and description language (SDL)“. U31 0.2 Abbreviations Abbreviations used in the present document are listed in GSM 01.04. ETSI COPYRIGHT European Telecommunications Standards Ins
