1、 ETSI ES 201 803-5 V1.1.1 (2004-04)ETSI Standard Dynamic synchronous Transfer Mode (DTM);Part 5: Mapping of PDH over DTMETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 2 Reference DES/TISPAN-02005-DTM Keywords DTM, PDH, protocol, switching, transmission ETSI 650 Route des Lucioles F-06921 Sophia Antipolis C
2、edex - 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 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 docu
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5、tus.asp If you find errors in the present document, send your comment to: editoretsi.org 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
6、 Institute 2004. 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 Trade Mark of ETSI registered for the ben
7、efit of its Members and of the 3GPP Organizational Partners. ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 5 1 Scope 6 2 References 6 3 Definitions and abbreviations.6 3.1 Definitions6 3.2 Abbreviations .7 4 Overview 8 5 DTM PDH transport ap
8、plication layer .10 5.1 Access point information10 5.1.1 Characteristic information 10 5.1.2 Adapted information.10 5.1.3 Management information10 5.1.4 Timing information.10 5.2 Connection function (Mn_C) .10 5.3 Trail termination functions.10 5.3.1 Application 2 trail termination function (AP2_TT)
9、10 5.3.1.1 Application 2 trail termination source function (AP2_TT_So).11 5.3.1.2 Application 2 trail termination sink function (AP2_TT_Sk).12 5.4 Adaptation functions 13 5.4.1 DTM Application 2/PDH PX path adaptation function (AP2/PX_A) 13 5.4.1.1 Media adaptation source function (AP2/PX_A_So) .13
10、5.4.1.2 Media adaptation sink function (AP2/PX_A_Sk) .14 6 Mapping of PDH path layer over DTM .15 6.1 DCAP-2 slot elements 15 History 16 ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ET
11、SI. 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 availa
12、ble 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 given as to the existence of other IPRs not referenced
13、 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 converged Services and Protocols for Advanced Networking
14、(TISPAN). The present document is part 5 of a multi-part deliverable covering the Dynamic synchronous Transfer Mode (DTM), as identified below: Part 1: System description; Part 2: System characteristics; Part 3: Physical protocol; Part 4: Mapping of DTM frames into SDH containers; Part 5: Mapping of
15、 PDH over DTM; Part 6: Mapping of Synchronous Digital Hierarchy (SDH) over DTM; Part 7: Ethernet over DTM Mapping; Part 8: Mapping of Frame relay over DTM; Part 9: Mapping of ATM over DTM; Part 10: Routeing and switching of IP flows over DTM; Part 11: Mapping of video streams over DTM; Part 12: Mapp
16、ing of MPLS over DTM; Part 13: System description of sub-rate DTM; Part 14: Network management. ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 5 Introduction Dynamic synchronous Transfer Mode (DTM) is a time division multiplex and a circuit-switched network technique that combines switching and transport.
17、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 aspects that are mandatory or optional for nodes from different vendors to interoperate
18、. 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 8B10B encoding. Part 4 describes how DTM frames are mapped onto SDH containers. The t
19、ransport of various tributary signals is specified for PDH (Part 5), SDH (Part 6), Ethernet (Part 7), Frame Relay (Part 8), ATM (Part 9), IP (Part 10), MPLS (Part 11), video streaming (Part 12). Subrate DTM is described in Part 13. Finally, management aspects are standardized in Part 14. ETSI ETSI E
20、S 201 803-5 V1.1.1 (2004-04) 6 1 Scope The present document: specifies a method for mapping ETSI PDH 2 048 kb/s, 8 448 kb/s, 34 368 kb/s and 139 264 kb/s and ANSI PDH 1 544 kb/s, 6 312 kb/s, 44 736 kb/s and 139 264 kb/s signals over DTM channels; specifies the characteristics of critical parameters
21、for mapping ETSI PDH signals 2 048 kb/s, 8 448 kb/s, 34 368 kb/s and 139 264 kb/s and ANSI PDH 1 544 kb/s, 6 312 kb/s, 44 736 kb/s and 139 264 kb/s over DTM channels; gives terms and definitions for mapping encoding. 2 References The following documents contain provisions which, through reference in
22、 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 reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies
23、. 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 EN 300 417-5-1: “Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 5-1: Plesiochronous Digital H
24、ierarchy (PDH) path layer functions“. 2 ETSI ES 201 803-2-3: “Dynamic synchronous Transfer Mode (DTM); Part 2: System Characteristics; Sub-part 3: Transport network and channel adaptation aspects“. 3 ITU-T Recommendation G.805: “Generic functional architecture of transport networks“. 4 ITU-T Recomme
25、ndation G.806: “Characteristics of transport equipment - Description methodology and generic functionality“. 5 ITU-T Recommendation G.823: “The control of jitter and wander within digital networks which are based on the 2048 kbit/s hierarchy“. 6 ITU-T Recommendation G.824: “The control of jitter and
26、 wander within digital networks which are based on the 1544 kbit/s hierarchy“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: Access Point (AP): “reference point“ that consists of the pair of co-located “unidirecti
27、onal access“ points, and therefore represents the binding between the trail termination and adaptation functions (adopted from ITU-T Recommendation G.805 3) ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 7 Adapted Information (AI): information passing across an AP NOTE: See also ITU-T Recommendation G.805
28、3 (adopted from ITU-T Recommendation G.806 4). Alarm Indication Signal (AIS): special marker sent in a data slot to mark the lack of transported data as a result of a defect in the transmission path channel: set of slots allocated from one source access node to one or more destination access nodes i
29、n a network Characteristic Information (CI): signal with a specific format, which is transferred on “network connections“ NOTE: The specific formats will be defined in the technology specific Recommendations. The information passing across a CP or TCP (adopted from ITU-T Recommendations G.805 3 and
30、G.806 4). Connection Point (CP): reference point where the output of a trail termination source or a connection is bound to the input of another connection, or where the output of a connection is bound to the input of a trail termination sink or another connection (adopted from ITU-T Recommendation
31、G.806 4) frame: set of slots forming an entity that is transmitted on a physical medium repeatedly every 125 s (nominally), i.e. 8 000 frames/second idle: special marker sent in a data slot to mark the lack of transported data in the slot Performance Supervision (PS): special marker sent with the da
32、ta containing per channel Performance Supervision information Server Signal Fail (SSF): signal fail indication output at the CP of an adaptation function (adopted from ITU-T Recommendation G.806 4) Signal Fail (SF): signal indicating the associated data has failed in the sense that a near-end defect
33、 condition (not being the degraded defect) is active (adopted from ITU-T Recommendation G.806 4) slot: time slot within the frame being able to transport 64 bit of data or a number of special codes Trail Signal Fail (TSF): signal fail indication output at the AP of a termination function (adopted fr
34、om ITU-T Recommendation G.806 4) 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: A Adapted function AI Adapted InformationAIS Alarm Indication Signal AP Access Point BPn ByPass layer type n BPnP ByPass layer type n Protection CI Characteristic Informati
35、on CK ClocK D Data PDH Plesiochronous Digital Hierarchy PS Performance Supervision Sk Sink So Source SSF Server Signal Fail TS Time Slot layer TSF Trail Signal Fail TSP Time Slot layer Protection TST Time Slot layer Tunnel ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 8 4 Overview The ETSI PDH 2 048 kb/s,
36、 8 448 kb/s, 34 368 kb/s and 139 264 kb/s and ANSI PDH 1 544 kb/s, 6 312 kb/s, 44 736 kb/s and 139 264 kb/s signals mapping over DTM (see figure 1) describes the mapping of the PDH bitstream into DTM channels. The functionality is part of the DTM Application layer and provides a transport service to
37、 the PDH path layer (EN 300 417-5-1 1). The PDH traffic is a fixed rate isochronous/plesiochronous bitstream. The bitrate may deviate from the PDH transmission rate by up to 50 ppm (depending on each stream) such that frequency justification is required. The SDH frequency justification mechanism of
38、pointer justifications is replaced by DTM DCAP-2 bit justification upon justification opportunity. The PDH supervision functionality is mapped over to the DTM functionality and PDH AIS is being encoded into DTM AIS. ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 9 BPnBypass LayerTS_CPMedia Layer 1M1M1_APPL
39、1_CPM1_CPPhysical Link Layer 1PL1BP1_CPS4_APSDH Higher order path layerBP2_CPS4TSTime Slot LayerCHnCHPCHP/CHCHPCHP/CHTSPTSP/TSTSTTST/TSTSTS/CHTSTS/CHTSTTST/TSTSPTSP/TSBPnBPn/TSBPnPBPnP/TSnBPnBPn/TSBPnPBPnP/TSnS4S4/BP2S4S4/BP2PL1PL1/BP1PL1PL1/BP1S4_APM1M1/PL1M1M1/PL1Channel LayerApplication LayerCH_C
40、PAP1_CPAP0_CP AP2_CPCH0CH0/AP0CH1CH1/AP1CH2CH2/AP2CH2CH2/AP2CH1CH1/AP1CH0CH0/AP0Figure 1: Transport network reference model for DTM ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 105 DTM PDH transport application layer The ETSI PDH 2 048 kb/s, 8 448 kb/s, 34 368 kb/s and 139 264 kb/s and ANSI PDH 1 544 kb/
41、s, 6 312 kb/s, 44 736 kb/s and 139 264 kb/s signals over DTM transport is specified as the adaptation functions on top of the DCAP-2 trail terminator functions, providing the Px trail over DTM. AP2AP2_APPX_CPAP2_CPAP2AP2/PXAP2AP2/PXFigure 2: DTM application layer 2 for PDH PX (X=11x, 12x, 21, 22, 31
42、, 32, 4x) mapping atomic functions 5.1 Access point information 5.1.1 Characteristic information The Characteristic Information (CI) of the Connection Point (CP) is described in (EN 300 417-5-1 1). 5.1.2 Adapted information The Adapted Information (AI) of the Adaption Point (AP) is described in (ES
43、201 803-2-3 2). 5.1.3 Management information There is no management information for this application. 5.1.4 Timing information There is no timing information for this application. 5.2 Connection function (Mn_C) See ES 201 803-2-3 2. 5.3 Trail termination functions 5.3.1 Application 2 trail terminati
44、on function (AP2_TT) The application 2 trail termination function maps data, clock and failure signals between CI and AI. ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 115.3.1.1 Application 2 trail termination source function (AP2_TT_So) Symbol AP2AP2_AIAP2_CIFigure 3: Application 2 trail termination sour
45、ce (AP2_TT_So) Interfaces Table 1: AP2_TT_So input and output signals Input(s) Output(s) AP2_AI_D AP2_CI_D AP2_AI_CK AP2_CI_CKAP2_AI_TSF AP2_CI_SSF Processes and anomalies None. Defects None. Consequent actions None. Defect correlation None. Performance monitoring None. Output mapping AP2_CI_D AP2_A
46、I_D AP2_CI_CK AP2_AI_CK AP2_CI_SSF AP2_AI_TSF Fault management None. Long term performance monitoring None. ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 125.3.1.2 Application 2 trail termination sink function (AP2_TT_Sk) Symbol AP2AP2_AIAP2_CIFigure 4: Application 2 trail termination sink (AP2_TT_Sk) Int
47、erfaces Table 2: AP2_TT_Sk input and output signals Input(s) Output(s) AP2_CI_D AP2_AI_D AP2_CI_CK AP2_AI_CKAP2_CI_SSF AP2_AI_TSF Processes and anomalies None. Defects None. Consequent actions None. Defect correlation None. Performance monitoring None. Output mapping AP2_AI_D AP2_CI_D AP2_AI_CK AP2_
48、CI_CK AP2_AI_TSF AP2_CI_SSF Fault management None. Long term performance monitoring None. ETSI ETSI ES 201 803-5 V1.1.1 (2004-04) 135.4 Adaptation functions 5.4.1 DTM Application 2/PDH PX path adaptation function (AP2/PX_A) This clause describes the generic PDH path layer adaptation using DCAP-2, wh
49、ere the PDH path layer may be any of P11x, P12x, P21, P22, P31, P32 and P4x. 5.4.1.1 Media adaptation source function (AP2/PX_A_So) Symbol AP2/PX PX_CI AP2_AI Figure 5: DTM Application 2/PDH PX path adaptation source (AP2/PX_A_So) Interfaces Table 3: AP2/PX_A_So input and output signals Input(s) Output(s) PX_CI_D AP2_AI_D PX_CI_CK AP2_AI_CKPX_CI_SSF AP2_AI_TSF Processes and anomalies None. Defects None. Consequent actions None. Defect correlation None. Performance monitoring None. Output mapping AP2_AI_D PX_CI_D
