1、ETSI TS 101 297 V8.2.0 (2001-09) Technical Specification Digital cellular telecommunications system (Phase 2+); General Packet Radio Service (GPRS); Mobile Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence Protocol (SNDCP) (3GPP TS 04.65 version 8.2.0 Release 1999) 3G
2、PP TS 04.65 version 8.2.0 Release 1999 1 Reference RTS/TSGN-O10465Q8R2 Keywords GSM ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de G
3、rasse (06) No 7803/88 Imriortan t notice ETSI TS 101 297 V8.2.0 (2001-09) Individual copies of the present document can be downloaded from: http:/lw.etsi. orq The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference i
4、n 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
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6、ay be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2001. All rights reserved. ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 2 ETSI TS 101 297 V8.2.0 (2001-09)
7、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 O00 314: “Intellectual Property
8、 Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (p). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried o
9、ut by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR O00 3 14 (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 the ETSI 3d Gener
10、ation 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
11、and ETSI identities can be found under www.etsi.ormkev . ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 3 ETSI TS 101 297 V8.2.0 (2001-09) Contents Intellectual Property Rights 2 Foreword . 2 Foreword . 6 1 Scope 7 2 References 7 3 Definitions and abbreviations . 8 . 8 3.1 . 9 3.2 4 General . 9 Servi
12、ce primitives and functions 10 5.1 Service primitives . 10 5.1.1 SNDCP service primitives 11 5.1.1.1 SN-DATA.request . 5.1.1.2 SN-DATAindication . . 5.1.1.3 SN-UNITDATA.request . 5.1.1.4 SN-UN1TDATA.indication . 5.1.1.5 SN-XID.request . 5.1.1.6 SN-XID.indication . . 5.1.1.7 SN-XID.response . . 5.1.1
13、.8 SN-XID.confirm . 5.1.2 Service primitives used by SNDCP laye . 5.1.2.1 LL-RESET.indication . 5.1.2.2 LL-ESTABLISH.request . . 5.1.2.3 LL-ESTABLISH.indication 5.1.2.4 LL-ESTABLISH.response 5.1.2.5 LL-ESTABLISH . confirm 5.1.2.6 LL-RELEASE.request 5.1.2.7 5.1.2.8 LL-RELEASE . confirm 5.1.2.9 LL-XID
14、 . request 5.1.2.10 LL-XID.indication . 5.1.2.11 LL-XID.response . 5.1.2.12 LL-XID.confirm . 5.1.2.13 5.1.2.14 5.1.2.16 5 . 5.1.2.15 . 15 . 15 5.1.2.17 . 15 5.1.2.18 LL-STATUS.indication . 15 5.1.2.19 SNSM-ACTIVATE.indication . 16 5.1.2.20 SNSM-ACTIVATE.response . 16 5.1.2.21 SNSM-DEACTIVATE.indicat
15、ion . 16 5.1.2.22 SNSM-DEACTIVATE.response . 16 5.1.2.23 SNSM-MODIFY indication . 16 5.1.2.24 SNSM-MODIFY . response . 17 5.1.2.25 SNSM-STATUS.request . . 17 5.1.2.26 SNSM-SEQUENCE.indication . 5.1.2.27 SNSM-SEQUENCE.response . 17 5.1.2.28 SNSM-STOP-ASSIGN.indication 17 5.2 Service functions 17 6 Pr
16、otocol fmctions 20 6.1 Multiplexing of N-PDUs . . 20 ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 4 ETSI TS 101 297 V8.2.0 (2001-09) 6.2 6.2.1 6.2.1.1 6.2.1.2 6.2.1.3 6.2.1.4 6.2.2 6.2.2.1 6.2.2.2 6.2.2.3 6.3 6.4 6.5 6.5.1 6.5.1.1 6.5.1.1.1 6.5.1.1.2 6.5.1.1.3 6.5.1.1.4 6.5.1.1.5 6.5.1.2 6.5.1.3 6.
17、5.2 6.5.2.1 6.5.2.1.1 6.5.2.1.2 6.5.2.2 6.5.2.3 6.5.3 6.5.3.1 6.5.3.1.1 6.5.3.2 6.5.3.3 6.6 6.6.1 6.6.1.1 6.6.1.1.1 6.6.1.1.2 6.6.1.1.3 6.6.1.1.4 6.6.1.1.5 6.6.1.2 6.6.1.3 6.6.2 6.6.2.1 6.6.2.1.1 6.6.2.1.2 6.6.2.1.3 6.6.2.1.4 6.6.2.2 6.6.2.3 6.7 6.7.1 6.7.1.1 6.7.1.2 6.7.2 6.7.3 6.7.4 6.7.4.1 6.7.4.
18、2 6.7.4.3 Establishment and release of acknowledged peer-to-peer LLC operation Establishment of acknowledged peer-to-peer LLC operation . 20 .20 Establishment criteria . . 20 Re-establishment of the acknowledged peer-to-peer LLC operation. . 2 1 Establishment procedure . 21 Exceptional situations .2
19、2 .22 Release criteria . .22 Release procedure .23 Release initiated by the LLC layer . . 23 N-PDU buffering . .23 Management of delivery sequeiice .23 Protocol control information compression . 23 Negotiation of multiple protocol control information compression types . .23 Format of the protocol co
20、ntrol information compression field .24 Spare bit (X) . Propose bit (P) Entity number . .24 Algorithm type . .25 PCOMP .25 NDCP XID negotiation .26 . 26 . 26 Paranieters .27 . 27 Release of acknowledged peer-to-peer LLC operation .24 .24 Paranieters for compression entities TCP/IP header compression
21、 (RFC 1 144 . . compression (RFC 2507) Applicable NSAPIs Assignment of PCOMP values for RFC2507 . compression types Format ofthe data compression field . Spare bit (X) Propose bit (P) Entity number . .30 Algorithm type . .30 DCOMP .30 Resetting compression entities following SNDCP XID negoti . 31 Pa
22、ranieters for compression entities . . 31 Management of V.42 bis data compression. . 31 Paranieters . 31 Applicable NSAPIs . 32 Po . 32 . .30 P, . 32 Assignment of DCOMP values . 32 Operation of V.42 bis data compression . 32 Segmentation and reassembly . . 32 General . . 32 Segmentation . 32 Reasse
23、mbly . 33 Segmentation and reassembly in acknowledged mode .33 Segmentation and reassembly in unacknowledged mode .33 Exception situations . . 34 Receive First Segment state . . 34 Receive Subsequent Segment state . 34 Discard state. .34 ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 5 ETSI TS 101 29
24、7 V8.2.0 (2001-09) 6.8 6.8.1 6.8.2 6.8.3 6.9 6.9.1 6.9.2 6.10 XID parameter negotiation . 34 Negotiation of compression entities 37 Values of SNDCP XID parameters . 37 Exception handling . 38 Data transfer . 39 Acknowledged mode 39 Unacknowledged mode . 40 Possible combinations of SNDCP protocol fun
25、ctions and their connection to service access points . 40 7 Definition of SN-PDU 41 7.1 Format convention 41 Numbering convention . 41 7.1.1 7.1.2 Order of transmission 41 7.1.3 Field mapping convention 41 7.2 SN-PDU Formats . 42 8 SNDCP XID parameters 44 Annex A (informative): Change Request Histor
26、y 45 History 46 ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 6 ETSI TS 101 297 V8.2.0 (2001-09) Foreword This Technical Specification has been produced by the 3d Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change
27、following formal TSG approval. Should the TSG modiSl the contents of the present document, it will be re-released by the TSG with an identiSling change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presente
28、d to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the
29、 document. ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 7 ETSI TS 101 297 V8.2.0 (2001-09) 1 Scope The present document provides the description of the Subnetwork Dependent Convergence Protocol (SNDCP) for the General Packet Radio Service (GPRS). The user of the services provided by SNDCP is a pack
30、et data protocol (PDP) at the mobile Station (MS) or the Relay at the Serving GPRS Support Node (SGSN). Additionally, a control entity, e.g., AT command interpreter, may be an SNDCP user. SNDCP uses the services provided by the Logical Link Control (LLC) layer 4 and the Session Management (SM) sub-l
31、ayer 2. The main functions of SNDCP are: - Multiplexing of several PDPs. - - - Compression / decompression of user data. Compression / decompression of protocol control information. Segmentation of a network protocol data unit (N-PDU) into Logical Link Control Protocol Data Units (LL-PDUs) and re-as
32、sembly of LL-PDUs into an N-PDU. 3GPP TS 04.65 is applicable to GPRS MS and SGSN. 2 Re fe re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, editio
33、n number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest v
34、ersion of that document in the same Release as theyresent document. il 3GPP TS O 1.04: “Digital cellular telecommunications system (Phase 2+); Abbreviations and acronyms“. 3GPP TS 02.60: “Digital cellular telecommunication system (Phase 2+); General Packet Radio Service (GPRS); Service Description,
35、Stage 1“. 3GPP TS 03.60: “Digital cellular telecommunication system (Phase 2+); General Packet Radio Service (GPRS); Service Description, Stage 2“. 3GPP TS 04.07: “Digital cellular telecommunications system (Phase 2+); Mobile radio interface signalling layer 3; General aspects“. 3GPP TS 04.08: “Digi
36、tal cellular telecommunications system (Phase 2+), Mobile radio interface layer 3 specification“. 3GPP TS 04.64: “Digital cellular telecommunications system (Phase 2+); General Packet Radio Service (GPRS); Mobile Station Serving GPRS Support Node (MS - SGSN) Logical Link Control (LLC) layer specific
37、ation“. 21 31 41 SI 61 VI 3GPP TS 09.60: “Digital cellular telecommunications system (Phase 2+), General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp Interface“. RI ITU-T, Recommendation V.42 bis: “Data compression procedures for data circuit- terminating equipmen
38、t (DCE) using error correcting procedures“. ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 8 ETSI TS 101 297 V8.2.0 (2001-09) Pl u01 RFC-1144, V. Jacobson: “Compressing TCP/IP Headers for Low-Speed Serial Links“. RFC-2507, M. Degermark, B. Nordgren, S. Pink: “IP Header Compression“. 3 Definitions and
39、 abbreviations 3.1 De fi nit ions In addition to abbreviations in 3GPP TS 01.04 i and 3GPP TS 02.60 2 the following abbreviations apply: N201 N201-I N201-U N-PDU number NSAPI Receive N-PDU number Recovery state SAPI Segment number Send N-PDU number LLC layer parameter (see 3GPP TS 04.64 for clarity)
40、. Defines maximum number of octets in the information field of LL-PDU. Separate values are applicable for I (see N201- I), U and U1 (see N201-U) LL-PDUs. LLC layer parameter (see 3GPP TS 04.64 for clarity). Defines maximum number of octets available to a SN-DATA PDU for a specific SAPI. LLC layer pa
41、rameter (see 3GPP TS 04.64 for clarity). Defines maximum number of octets available to a SN-UNITDATA PDU for a specific SAPI. A sequence number assigned to N-PDUs per NSAPI. For each SN-PDU the NSAPI is an index to the PDP context of the PDP that is using the services provided by the SNDCP layer. Th
42、e value of the N-PDU number expected in the next N-PDU received by an NSAPI using acknowledged peer-to-peer LLC operation. A state for an NSAPI in which duplicated received N-PDUs shall be detected and discarded. The recovery state only applies to NSAPIs using acknowledged peer-to-peer LLC operation
43、. SAPI identifies the Service Access Point that the SN-PDU is using at the LLC layer. A sequence number assigned to SN-UNITDATA PDUs carrying segments of an N-PDU. The value to be assigned as the N-PDU number to the next N-PDU received from the SNDCP user by an NSAPI using acknowledged peer-to-peer
44、LLC operation. Send N-PDU number (unacknowledged) The value to be assigned as the N-PDU number to the next N-PDU received from the SNDCP user by an NSAPI using unacknowledged peer-to-peer LLC operation. The SNDCP entity handles the service functions provided by the SNDCP layer. The SNDCP entity is t
45、emporary logical link identity specific. SNDCP entity SNDCP management entity The SNDCP management entity handles communication with SM sub-layer and controls the operation of the SNDCP entity. Protocol entity that is using the services provided by the SNDCP layer. PDP entities and control entities,
46、 e.g., AT command interpreter, are the SNDCP users at the MS. Relay entity is the SNDCP user at the SGSN. The collection of SNDCP XID parameters being negotiated. It is transferred by the LL-XID and LL-ESTABLISH primitives between SNDCP and LLC. SNDCP user SNDCP XID block Refer to 3GPP TS 02.60 2 fo
47、r further GPRS definitions. ETSI 3GPP TS 04.65 version 8.2.0 Release 1999 Application 9 i ETSI TS 101 297 V8.2.0 (2001-09) 3.2 Abbreviations In addition to abbreviations in 3GPP TS 01.04 i, 3GPP TS 02.60 2, and 3GPP TS 03.60 3, the following abbreviations apply: DCOMP F GMM IP LLC M N-PDU NSAPI P PC
48、OMP PDP PDU PTP SAP1 SDU SGSN SM SNDCP SNSM TCP TLLI X QOS Identifier of the user data compression algorithm used for the N-PDU First segment indicator bit GPRS Mobility Management Internet Protocol Logical Link Control More bit used to indicate the last segment of N-PDU Network Protocol Data Unit N
49、etwork Layer Service Access Point Identifier Propose bit Identifier of the protocol control information compression algorithm used for the N-PDU Packet Data Protocol e.g., IPv4 or IPv6 Protocol Data Unit Point to Point Quality of Service Service Access Point Identifier Service Data Unit Serving GPRS Support Node Session Management Subnetwork Dependent Convergence Protocol Transmission Control Protocol Temporary Logical Link Identifier Spare bit SNDCP-SM 4 General The present document describes the functionality of the GPRS SNDCP. The overall GP
