1、 ETSI ES 201 803-12 V1.1.1 (2005-01)ETSI Standard Dynamic synchronous Transfer Mode (DTM);Part 12: Mapping of MPLS over DTMETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 2 Reference DES/TISPAN-03004-DTM Keywords DTM, MPLS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 9
2、4 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture 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
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6、a. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a T
7、rade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 5 1 Scope 6 2 References 6 3 Abbreviations .6 4 Overview 7 5 DTM Application 1 layer (AP1) 7
8、5.1 Access point information7 5.1.1 Characteristic Information 7 5.1.2 Adapted Information.7 5.1.3 Management Information .8 5.1.4 Timing Information.8 5.2 Connection function (AP1_C)8 5.3 Trail Termination functions8 5.3.1 Application 1 Trail Termination function (AP1_TT) .8 5.3.1.1 Application 1 T
9、rail Termination Source function (AP1_TT_So)8 5.3.1.2 Application 1 Trail Termination Sink function (AP1_TT_Sk) .9 5.4 Adaptation functions 10 5.4.1 DTM Application 1 to MPLS Transport Layer Adaptation function (AP1/TL_A) 10 5.4.1.1 DTM Application 1 to MPLS Transport Layer Adaptation Source functio
10、n (AP1/TL_A_So) 10 5.4.1.2 DTM Application 1 to MPLS Transport Layer Adaptation Sink function (AP1/TL_A_Sk) 12 6 Mapping of MPLS over DTM13 Annex A (informative): Bibliography.14 History 15 ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 4 Intellectual Property Rights IPRs essential or potentially essentia
11、l 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
12、to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be
13、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 ETSI Standard (ES) has been produced by ETSI Technical Committee Telecommunications and Internet con
14、verged Services and Protocols for Advanced Networking (TISPAN). The present document is part 12 of a multi-part deliverable covering the Dynamic synchronous Transfer Mode (DTM), as identified below: ES 201 803-1: “System description“; ES 201 803-2: “System characteristics“; ES 201 803-3: “Physical p
15、rotocol“; ES 201 803-4: “Mapping of DTM frames into SDH containers“; ES 201 803-5: “Mapping of PDH over DTM“; ES 201 803-6: “Mapping of Synchronous Digital Hierarchy (SDH) over DTM“; ES 201 803-7: “Ethernet over DTM Mapping“; ES 201 803-9: “Mapping of ATM over DTM“; TR 101 803-10: “Routeing and swit
16、ching of IP traffic over DTM“; ES 201 803-11: “Mapping of video streams over DTM“; ES 201 803-12: “Mapping of MPLS over DTM“; ES 201 803-13: “System description of sub-rate DTM“. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 5 Introduction Dynamic synchronous Transfer Mode (DTM) is a time division multip
17、lex and a circuit-switched network technique that combines switching and transport. Part 1 describes the general properties of DTM and the DTM service over a unidirectional data channel. The overall system architecture is described and fundamental functions are identified. Part 2 includes system asp
18、ects that are mandatory or optional for nodes from different vendors to interoperate. The interworking granularity should be at node level, such that nodes from different vendors can interoperate with regard to well-defined functions. Part 3 specifies the physical layer for physical links based on 8
19、B10B encoding. Part 4 describes how DTM frames are mapped onto SDH containers. The transport of various tributary signals is specified for PDH (part 5), SDH (part 6), Ethernet (part 7), ATM (part 9), IP (part 10), video streaming (part 11) and MPLS (part 12). Subrate DTM is described in part 13. ETS
20、I ETSI ES 201 803-12 V1.1.1 (2005-01) 6 1 Scope The present document: specifies a method for mapping MPLS labelled packets over DTM channels; specifies the characteristics of critical parameters for mapping MPLS labelled packets over DTM channels; gives terms and definitions for mapping encoding and
21、 decoding. 2 References 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 and/or edition number or version number) or non-specific. For a specific referenc
22、e, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ETSI ES 201 803-2-3: “Dynamic synchronous Transfer Mode (DTM
23、); Part 2: System characteristics; Sub-part 3: Transport network and channel adaptation aspects“. 2 IETF RFC 3031: “Multiprotocol Label Switching Architecture“. 3 IETF RFC 3032: “MPLS Label Stack Encoding“. 3 Abbreviations For the purposes of the present document, the following abbreviations apply:
24、A Adapted function AI Adapted InformationAP Access Point AP1 APplication layer channel adaptation type 1 CI Characteristic Information CK ClocK CMI Channel Multiplex Identifier CP Connection Point D Data DCAP DTM Channel Adaptation Protocol DTM Dynamic synchronous Transfer Mode FS Frame Start signal
25、 LEN LENgth LSR Label Switching Router MC MultiCast MPLS MultiProtocol Label Switching PRI PRIority Sk SinkSo Source SSF Server Signal Fail TL Transport Layer ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 7 TSF Trail Signal Fail TT Trail Termination 4 Overview The MPLS over DTM mapping describes the mapp
26、ing of MPLS labelled packets over DTM channels. The functionality is part of the DTM Application layer and provides a transport service to the MPLS layer similar to the transport functionality provided by PPP and LAN interfaces in RFC 3032 3. The MPLS over DTM mapping enables the service where MPLS
27、Label Switching Routers (LSR) are able to be interconnected over DTM and thus create a MPLS overlay network. No signalling interaction is defined, but the channel capacity may be inferred from the MPLS signalling. The MPLS Architecture is defined in RFC 3031 2. 5 DTM Application 1 layer (AP1) The MP
28、LS over DTM transport is specified as the Application 1 (AP1) adaptation functions on top of the DCAP-1 (ES 201 803-2-3 1) adaptation functions, providing the MPLS Transport Layer trail over DTM. AP1AP1_APTL_CPAP1_CPAP1AP1/TLAP1AP1/TLFigure 1: Application 1 atomic functions 5.1 Access point informat
29、ion 5.1.1 Characteristic Information The Characteristic Information (CI) of the Connection Point (CP) is: the MPLS labelled packet set of octet data TL_CI_D; the MPLS labelled packet octet clock indication TL_CI_CK; the MPLS labelled packet frame start indication TL_CI_FS; the MPLS labelled packet l
30、ength indication TL_CI_LEN; the MPLS labelled packet unicast/multicast indication TL_CI_MC. 5.1.2 Adapted Information The Adapted Information (AI) of the Adaption Point (AP) is described in ES 201 803-2-3 1 as the Application 1 adapted information. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 8 5.1.3 Ma
31、nagement Information Not applicable. There is no management information defined for this layer. 5.1.4 Timing Information Not applicable. There is no timing information defined for this layer. 5.2 Connection function (AP1_C) Not applicable. There are no connection functions defined for this layer. 5.
32、3 Trail Termination functions The trail termination functions are empty mappings between AI and CI. 5.3.1 Application 1 Trail Termination function (AP1_TT) The application 1 trail termination functions are empty mappings between AI and CI. 5.3.1.1 Application 1 Trail Termination Source function (AP1
33、_TT_So) Symbol: AP1AP1_AIAP1_CIFigure 2: Application 1 Trail Termination Source (AP1_TT_So) Interfaces: Table 1: AP1_TT_So Input and output signals Input(s) Output(s) AP1_AI_D AP1_CI_D AP1_AI_CK AP1_CI_CKAP1_AI_FS AP1_CI_FS AP1_AI_LEN AP1_CI_LENAP1_AI_CMI AP1_CI_CMI AP1_AI_PRI AP1_CI_PRI AP1_AI_TSF
34、AP1_CI_SSF Processes and anomalies: None. Defects: None. Consequent actions: None. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 9 Defect correlation: None. Performance monitoring: None. Output mapping: AP1_CI_D AP1_AI_D. AP1_CI_CK AP1_AI_CK. AP1_CI_FS AP1_AI_FS. AP1_CI_LEN AP1_AI_LEN. AP1_CI_CMI AP1_AI_
35、CMI. AP1_CI_PRI AP1_AI_PRI. AP1_CI_SSF AP1_AI_TSF. Fault management: None. Long term performance monitoring: None. 5.3.1.2 Application 1 Trail Termination Sink function (AP1_TT_Sk) Symbol: AP1AP1_AIAP1_CIFigure 3: Application 1 Trail Termination Sink (AP1_TT_Sk) Interfaces: Table 2: AP1_TT_Sk Input
36、and output signals Input(s) Output(s) AP1_CI_D AP1_AI_D AP1_CI_CK AP1_AI_CKAP1_CI_FS AP1_AI_FS AP1_CI_LEN AP1_AI_LENAP1_CI_CMI AP1_AI_CMI AP1_CI_PRI AP1_AI_PRI AP1_CI_SSF AP1_AI_TSF Processes and anomalies: None. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 10Defects: None. Consequent actions: None. Def
37、ect correlation: None. Performance monitoring: None. Output mapping: AP1_AI_D AP1_CI_D. AP1_AI_CK AP1_CI_CK. AP1_AI_FS AP1_CI_FS. AP1_AI_LEN AP1_CI_LEN. AP1_AI_CMI AP1_CI_CMI. AP1_AI_PRI AP1_CI_PRI. AP1_AI_TSF AP1_CI_SSF. Fault management: None. Long term performance monitoring: None. 5.4 Adaptation
38、 functions 5.4.1 DTM Application 1 to MPLS Transport Layer Adaptation function (AP1/TL_A) This clause describes the MPLS labelled packet adaptation using Application 1 trail terminators. 5.4.1.1 DTM Application 1 to MPLS Transport Layer Adaptation Source function (AP1/TL_A_So) Symbol: AP1/TLTL_CIAP1
39、_AIFigure 4: Application 1 to Transport Layer Adaptation Source (AP1/TL_A_So) ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 11Interfaces: Table 3: AP1/TL_A_So Input and output signals Input(s) Output(s) TL_CI_D AP1_AI_D TL_CI_CK AP1_AI_CKTL_CI_FS AP1_AI_FS TL_CI_LEN AP1_AI_LENTL_CI_MC AP1_AI_CMI AP1_AI_P
40、RI AP1_AI_TSF Processes and anomalies: When TL_CI_MC is de-asserted, then AI_CMI shall be set to 0. When TL_CI_MC is asserted, then AI_CMI shall be set to 1. AI_PRI shall be set to 0. AI_TSF shall be de-asserted. Defects: None. Consequent actions: None. Defect correlation: None. Performance monitori
41、ng: None. Output mapping: AP1_AI_D TL_CI_D. AP1_AI_CK TL_CI_CK. AP1_AI_FS TL_CI_FS. AP1_AI_LEN TL_CI_LEN. AP1_AI_CMI AI_CMI. AP1_AI_PRI AI_PRI. AP1_AI_TSF AI_SSF. Fault management: None. Long term performance monitoring: None. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 125.4.1.2 DTM Application 1 to M
42、PLS Transport Layer Adaptation Sink function (AP1/TL_A_Sk) Symbol: AP1/TLTL_CIAP1_AIFigure 5: Application 1 to Transport Layer Adaptation Sink (P1/TL_A_Sk) Interfaces: Table 4: AP1/TL_A_Sk Input and output signals Input(s) Output(s) AP1_AI_D TL_CI_D AP1_AI_CK L_CI_CKAP1_AI_FS TL_CI_FS AP1_AI_LEN TL_
43、CI_LENAP1_AI_CMI TL_CI_MC AP1_AI_PRI AP1_AI_TSF Processes and anomalies: When AP1_AI_CMI is equal to 0, then CI_MC is de-asserted. When AP1_AI_CMI is equal to 1, then CI_MC is asserted. Defects: None. Consequent actions: None. Defect correlation: None. Performance monitoring: None. Output mapping: T
44、L_CI_D AP1_AI_D. TL_CI_CK AP1_AI_CK. TL_CI_FS AP1_AI_FS. TL_CI_LEN AP1_AI_LEN. TL_CI_MC CI_MC. Fault management: None. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 13Long term performance monitoring: None. 6 Mapping of MPLS over DTM The mapping of MPLS labelled packets into a DTM Application 1 format (i
45、.e. DCAP-1) requires no additional wrapping. The label stack entries immediately precede the DCAP-1 header and the labelled packet is transparently mapped into DCAP-1 with maintained octet order. The DCAP-1 length (AP1_AI_LEN) is set to the length of the complete labelled packet. The maximum packet
46、length allowed is 2 032 octets. The DCAP-1 CMI (AP1_AI_CMI) is set to 0 for MPLS unicast packets and 1 for MPLS multicast packets. The DCAP-1 priority field (AP1_AI_PRI) is set to 0 for all packets. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 14Annex A (informative): Bibliography ETSI ES 201 803-1: “Dynamic synchronous Transfer Mode (DTM); Part 1: System description“. ETSI ETSI ES 201 803-12 V1.1.1 (2005-01) 15History Document history V1.1.1 October 2004 Membership Approval Procedure MV 20041224: 2004-10-26 to 2004-12-24 V1.1.1 January 2005 Publication
