1、 STD-ETSI EN 301 Lh4-ENGL L999 3900855 0905579 535 EN 301 164 1.1.1 (1999-05) European Standad (Telecommunications series) Transmission and Multiplexing (TM); Synchronous Digital Hierarchy (SDH); SDH leased lines; Connection characteristics STDoETSI EN 301 Lb4-ENGL 1999 m 3400855 0405575 471 II 2 EN
2、 301 164 V1.1.1 (199905) Reference DEWM-03072 (as000ioo.PDF) Keywords leased line, ONP, SDH, transmission ETSI Postal address F-06921 Sophia Antipolis Cedex - FRANCE Office address 650 Route des Lucioles - Sophia Antipolis Vaibnne - FRANCE Siret No 348 623 562 00017 - NAF 742 C Association but non l
3、ucratif enregistre la Sow-ptfecture de Grasse (06) No 7803/88 Internet secretariat Q etsi. fr Individual copies of this ETSI deliverable can be downloaded from httpJlwww.etsi.org If you find errors in the present document, send your comment to: editoretsi.fr Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65
4、47 16 Cowriuht Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in aii media. O European Telecommunications Standards Institute 1999. All rights reserved STD.ETSI EN 301 164-ENGL 1999 3400855 O40557b
5、 308 EN 301 164 v1.1.1 (1999-05) 3 Contents intellectual Property Rights 5 Foreword 5 1 2 3 3.1 3.2 3.3 4 4.1 4.2 4.3 4.4 5 5.1 5.2 5.2.1 5.2.2 5.2.3 6 6.1 6.2 6.2.1 6.2.2 6.2.3 7 7.1 7.2 7.2.1 7.2.2 7.2.3 8 8.1 8.2 8.2.1 8.2.2 8.2.3 Scope 6 References 6 Definitions, symbols and abbreviations . 7 Sy
6、mbols 8 Definitions 7 Abbreviations . 9 Characteristics of VC-4, VC-3, VC-2 and VC-12 leased line connections . 10 Transfer delay . 10 Jitter 10 Tolerance of Vi Container (VC) timing 10 Error performance 11 Information transfer susceptance 11 Ermr performance 11 Bringing into service lunits . 11 Cha
7、ractenstics of VC-4 leased line connections . 11 Performance objectives . 11 Availability . 12 Characteristics of VC-3 leased line connections . 12 Information transfer susceptance 12 Bringing into service limits . 12 Performance objectives . 13 Characteristics of VC-2 leased line connections . 13 I
8、nformation transfer susceptance 13 Error performance 14 Bringing into service limits . 14 Availability . 14 Characteristics of VC-12 leased line connections . 15 Information transfer susceptance 15 Error performance 15 Bringing into service limits . 15 Performance objectives . 16 Availability . 16 E
9、!rror performance 12 Availability . 13 Performance objectives . 14 Annex A (normative): Test methods 17 A.l General . 17 A.1.1 Equipment connection 17 A.2 Test methods 17 A.2.1 Leased line timing tolerance, susceptance and symmetry . 17 A.2.2 Delay 18 A.2.3 Alarm Indication Signai (AIS) generation 1
10、9 A.2.4 Error performance 20 E TSI STD-ETSI EN 301 1b4-ENGL 1999 3400855 0405577 244 4 EN SO1 164 V1.l.l (1999.05) Annex B (informative): Derivation of error performance limits . 21 B . 1 introduction 21 B.2 Reference connections . 21 B.2.1 Terrestrial coMection . 21 B.2.2 Satellite connection 22 B.
11、3 Error performance objectives . 22 B.4 Long term error performance . 23 B.5 Error performance figures 23 Annex C (informative): Defects and consequent actions at leased line connections 25 C . 1 Explanation of defect detection and consequent actions of atomic function . 25 C.2 Handling of defects a
12、long a leased line connection or at the leased line interface . 25 Annex D (informative): Configuration of a lower order VC leased line connection . 28 Annex E (informative): Bibliography . 30 History 31 ETSI 5 EN 501 164Vl.l.l (199945) Intellectual Property Rights IPRs essential or potentially esse
13、ntiai to the present document may have been declared to ETSI. The information pertaining to these essentiai IPRs, if any, is publicly available for ETSI members and non-members, and can be found in SR O00 314 “lntellectud Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
14、ESI in respect ofETSI standards“, which is available Free OF charge fmm the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/www.etsi.orglipr). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been Generic requirements of transport functional
15、ity of equipment; Part 21: Synchronous Digiai Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions“. EN 300 417-3-1: “Transmission and Multiplexing (TM); Generic requirements of transport functionality of equipment; Part 3-1: Synchronous Transport Module-N (STM
16、-N) regenerator and multiplex section layer functions“. EN 300 41741: “Transmission and Multiplexing cl?vr; Generic requirements of transport functionality of equipment; Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions“. EN 301 165: “Transmission and Multiplexing (TM); Synchronous
17、Digitai Hierarchy (SDH): SDH leased lines; Network and terminal interface presentation. IT-T Recommendation G.826 (1996): “Error performance parameters and objectives for intemational, constant bit rate digital paths at or above the primary rate“. EN 300 417-1-1: “Transmission and Multiplexing (TM);
18、 Generic requirements of transport functionality of equipment; Part 1-1: Generic processes and performance“. EN 300 462-2: “Transmission and Multiplexing (TM); Generic requirements for synchronization networks; Part 2: mchronization netwofk architecture“. IT-T Recommendation M.2100 (1995): “Perfonmi
19、nce limits for bringing-into-service and maintenance of international digitai paths, sections and transmission systems“. ETSI 3 3.1 Definitions, symbols and abbreviations Definit ions For the purposes of the present document, the following terms and defiitions apply. layer: concept used to allow the
20、 transport network functionality to be described hierarchically as successive levels; each layer being solely concerned with the generation and transfer of its “characteristic information“ ciienserver layer: any two adjacent network iayers are associated in a clientlserver relationship. Each transpo
21、rt network iayer provides transport to the layer above and uses transport from the layers below. The layer providing transport is temed a “server“, the iayer using transport is termed “client“ Remote Defect Indication (RDI): signal which conveys the defect stahs of the characteristic information rec
22、eived by the Trail Tamhation sink function back to the network element which contains the characteristic information originating trail tennination source function Remote Error Indication (REI): signai which conveys either the exact or truncated number of error detection code violations within the ch
23、aracteristic information (as detected by the trail teetion sink function) back to the network element which contains the characteristic information originating tra tennination source function AU-4-AIS: STM-N signai in which the entire capacity of an Administrative Unit 4 (AU-4) is set to logic “1“ T
24、u-m-AIS: STM-N signal in which the entire capacity of a TU-m is set to logic “ 1“ Characteristic Information (CI): signai of specific rate and format which is transferred within and between “sub-networks“, and presented to an “adaptation“ function for “transpofl by the server layer network Connectio
25、n Point (CP): “reference point“ where the output of a “hail 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“. The “connection point“ is characterized by the information which
26、 passes across it. A bi-directional “connection point“ is formed by the association of a contra-directional pair Termination Connection Point (TCP): special case of a “connection point“ where a “trail termbation function is bound to an “adaptation“ function or a “connection“ function defect: density
27、 of anomalies has reached a level where the ability to perform a required function has been interrupted. Defects axe used as input for PERFORMANCE MANAGEMENT, the control of consequent actions, and the determination of fault cause ETSI 3.2 Symbols The diagammatic conventions and nomenclature used in
28、 the present document for adaptation, texmination and connection functions (used to describe the atomic functions) are taken from EN 300 417- 1- 1 Ci and are shown in fip 1. Adaptation functions from Server layer Y to Client layer 2 Trail Termination functions in layer Y 4 Sink Y 0;urce bidirectiona
29、l Y Connection functions in layer Y 4 I u nid ire c tio na1 bidirectional 9 Trail Termination function in layer Y and Adaptation function to layer Z 7 Sink 9 Source f $7 bidirectional NOTE: If the above symbols are used for generic figures, .e. not for specific layers, the layer references Y and Z m
30、ay be omitted. Alternatively, the references may be to the type of function or layer, e.g. supervision, protection. Figure 1 : Symbols and diagrammatic conventions ETSI - STD-ETSI EN 301 Lb4-ENGL 1999 E 3400855 0405582 LO or - for connection where satelfite transmission is involved the one way end-t
31、o-end delay shali be less than 350 ms. 4.3 Jitter The leased line connection shall operate as specified when the jitter at the leased line input is within the limits given in the companion standard EN 301 165 4. NOTE 1: The jitter and wander requirements of the Synchronous Transport Module, level N
32、(STM-N) section layers are given at the associated physical Section Layer to Regenerator Section Layer adaptation functions as specified in EN 300 417-2-1 i. NOTE 2: Jitter requirements of the VC-4 path are specified by the requirements for AU-4 pointer justification events of the Multiplex Section
33、Layer to VC-4 path Layer adaptation function which is specified in EN 300 417-3-1 2. NOTE 3: Jitter requirements of the low= order VC paths are specified by the requirements for TiJ-3/2/12 pointer justification events of the “VC-4 Layer to VC-3, VC-2 and VC-12 Layer Adaptation functions, S4/sX-A whi
34、ch are specified EN 300 41741 3. NOTE 4 Wander at the section layer may create pointer justification at VC path layers. Existing ETSs for leased line connection characteristics consider wander is irrelevant for a single leased line connection. That approach might be unacceptable for SDH leased limes
35、. ETSI 11 EN SO1 164 Vl.l.l (1999-05) 4.4 Error performance ITU-T Recommendation G.826 5 is used as a basis for deriving the error performance objectives specified in the present document. The performance parameters referred to in the present document are as those defined in ITU-T Recommendation G.8
36、26 5. The performance objective tables in the present document apply for a 24 hour test period. They are derived using ITU-T Recommendation G.826 5 as a basis. Detailed derivation of the performance objectives is described in aunex B of the present document. 5 Characteristics of VC-4 leased line con
37、nections 5.1 Information transfer susceptance Requirement: The connection shall be capable of transferring transparently a complete and bi-directional VC-4 except the N1 byte when the VC-4 is generated according to EN 301 165 4. subclause 4.3.1. The struchire of a VC-4 is shown in figure 2. The byte
38、s of a VC-4 are transmitted with a frequency of 8 IrHz, .e. the frame length is 125 p. When a defect OCCUIS: - along the leased line connection; or - at the leased line input (refer to EN 301 165 4); AU4-AIS shall OCCUT at the far end output. 12 261 VC-4 paylmd (9 x 260 bytes) NOTE: The contents of
39、83 may change at the tandem connection monitoring processes. The integrity of parity information of 83 is maintained through the leased line. Figure 2: Structure of a VC4 5.2 Error performance 5.2.1 Bringing into service limits There are no requirements under the present document. 5.2.2 Performance
40、objectives Requirement: The performance of a VC-4 leased line either in service or taken out of service in order to perfoman error measurement shall meet the requirements of table 1. STD-ETSI EN 30L Lb4-ENGL 1999 W 3400855 0405585 310 Performance parameter ES SES BBE 12 EN SO1 164 V1.l.l (199945) Ta
41、ble 1: Performance objectives over a 24 hour test period for a block length of 18 792 bits (VG4) Terrestrial Satellite Ratio (mean) S1 (note) Ratio (mean) S1 (note) 0,08 56746s 0,12 I10 575 s 0,001 68s 1,56x103 I112 s 1 ,o x 10-4 S 68 594 blocks 1,56 x 10“ S 107 170 blocks 5.2.3 Availability There a
42、re no requirements under the present document. 6 Characteristics of VC-3 leased line connections 6.1 Information transfer susceptance Requirement: The connection shall be capable of transferring transparently a complete and bi-directional VC-3 except the N1 byte. The structure of a VC-3 is shown in
43、figure 3. The bytes of a VC-3 are transmitted with a frequency of 8 WZ, i.e. the frame length is 125 ps. When a defect occurs: - along the leased line connection; 01 - at the leased line input (refer to EN 301 165 4); TU3-AIS shall occur at the far end output. 12 85 VC-3 paylad (9 x 84 bytes) NOTE:
44、The contents of 83 may change at the tandem connection monitoring processes. The integrity of parity information of 83 is maintained through the leased line. Figure 3: Structure of a VCS 6.2 Error performance 6.2.1 Bringing into service limits There are no requirements under the present document. ET
45、SI 6.2.2 Performance objectives Performance parameter Requirement: The performance of a VC-3 leased line either in service or taken out of service in order to perform an em measurement shall meet the requkements of table 2. Terrestrial Satellite Ratio (mean) I S1 (note) Ratio(mean) I S1 (note) Table
46、 2: Performance objectives over a 24 hour test period for a block length of 6 120 bits (VC-3) ES 0,0375 I S3 126 s 0,059 I 14912s SES I 0,001 I 168s I 1,56x104 I 1112s BBE I 1,0x104 I S68594blocks I 1,56x104 I 1107170blocks NOTE: The threshold S1 is defined in clause 8.4. 6.2.3 Avai la b i I ity The
47、re are no requirements under the present document. 7 Characteristics of VC-2 leased line connections 7.1 information transfer susceptance Requirement: The connection shall be capable of transferring transpmnty a complete and bi-directional VC-2 except the N2 byte. The stnicture of a VC-2 is shown in
48、 figure 4. The bytes of a VC-2 are transmitted with a frequency of 2 kHz, i.e. the frame length is 500 p. When a defect occurs: - along the leased line connection; or - at the leased line input (refer to EN 301 165 4); TUL-AIS hail occur at the far end output. ETSI STD=ETSI EN 301 Lb4-ENGL 1999 = 34
49、00855 0405587 193 D Performance parameter ES SES BBE 14 Terrestrial Satellite Ratio (mean) SI (note) Ratio (mean) S1 (note) 0,025 62067s 0,039 53254s 0,001 568s 1,56 x lo3 I112 s 1,0x10-4 17017blOCks 1,56x104 526628 blocks EN 301 164 V1.l.l (199945) 1 2 1 07 108 1 o9 214 215 216 321 322 323 428 v5 VC2 payload (106 bytes) J2 VC2 payload (106 bytes) N2 VC-2 payload (106 bytes) u4 VC-2 payload (106 bytes) NOTE: The contents of V51,2 may change at the tandem connection monitoring processes. The parity information of the BIP-2
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