1、 International Telecommunication Union ITU-T G.8251TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(04/2011) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Packet over Transport aspects Quality and availability targets The control of jitter and wander within the op
2、tical transport network (OTN) Amendment 1 Recommendation ITU-T G.8251 (2010) Amendment 1ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANS
3、MISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOT
4、ELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPEC
5、TS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 Ethernet over Transport aspects G.8000G.8099 MPLS over Transport aspects G.8100G.8199 Quality and availability targets G.8200G.8299Service Manag
6、ement G.8600G.8699 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) i Recommendation ITU-T G.8251 The control of jitter and wander within the optical transport network (OTN) Amendment 1 Summary Amendment 1 t
7、o Recommendation ITU-T G.8251 (2010) provides the values for high-band jitter of the OTU3 and OTU4 multilane interfaces. History Edition Recommendation Approval Study Group 1.0 ITU-T G.8251 2001-11-29 15 1.1 ITU-T G.8251 (2001) Cor. 1 2002-06-13 15 1.2 ITU-T G.8251 (2001) Amend. 1 2002-06-13 15 1.3
8、ITU-T G.8251 (2001) Cor. 2 2008-05-22 15 1.4 ITU-T G.8251 (2001) Amend.2 2010-01-13 15 2.0 ITU-T G.8251 2010-09-22 15 2.1 ITU-T G.8251 (2010) Amend. 1 2011-04-13 15 ii Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized
9、agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a v
10、iew to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommend
11、ations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for concis
12、eness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendat
13、ion is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. I
14、NTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights
15、, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers
16、are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2012 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permis
17、sion of ITU. Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) 1 Recommendation ITU-T G.8251 The control of jitter and wander within the optical transport network (OTN) Amendment 1 1) Scope This amendment contains material to be added to Recommendation ITU-T G.8251, The control of jitter and wander within th
18、e optical transport network (OTN), to fully specify the jitter of the multilane OTU3 and OTU4 interfaces. 2) Corrected material for ITU-T G.8251 The following clauses of ITU-T G.8251 are to be corrected by the given entries. 2.1) Clause 5, Network limits for the maximum output jitter and wander at a
19、n OTUk interface In Table 5.1-1, modify the FFS entries for the multilane interface as shown below: Table 5.1-1 Maximum permissible jitter at OTUk interfaces Interface Measurement bandwidth, 3 dB frequencies (Hz) Peak-to-peak amplitude (UIpp) OTU1 5 k to 20 M 1.5 1 M to 20 M 0.15 OTU2 20 k to 80 M 1
20、.5 4 M to 80 M 0.15 OTU3 20 k to 320 M 6.0 16 M to 320 M 0.18 OTL3.4 (OTU3 Multilane) per lane 20 k to 80 MFFS 6.0FFS 4 M measured up to fourth-order Bessel-Thomson filter defined in clause 87.8.9 of IEEE 802.3ba Each lane according to clause 87.7.2, Table 87-8, and clause 87.8.11 of IEEE 802.3ba OT
21、L4.4 (OTU4 Multilane) per lane 50 k to 200 MFFS 6.0FFS 10 M measured up to fourth-order Bessel-Thomson filter defined in clause 88.8.8 of IEEE 802.3ba Each lane according to clause 88.8.10, Table 88-13 of IEEE 802.3ba 2 Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) Table 5.1-1 Maximum permissible jitter
22、at OTUk interfaces Interface Measurement bandwidth, 3 dB frequencies (Hz) Peak-to-peak amplitude (UIpp) NOTE OTU1 1 UI = ps 1.375ns)48832.2()255(238= OTU2 1 UI = ps 38.93ns)95328.9()255(237= OTU3 1 UI = ps 25.23ns)81312.39()255(236= OTL3.4 1 UI = ps 92.98ns)81312.39()255(2364=per lane OTL4.4 1 UI =
23、ps 35.77ns)5328.99()255(2274=per lane 2.2) Clause 6.1.3, OTU3 jitter and wander tolerance In Table 6.1-4 and Figure 6.1-4, modify the entries for the multilane interface as shown below: Table 6.1-4 OTL3.4 per lane input sinusoidal jitter tolerance limit Frequency f (Hz) Peak-to-peak amplitude (UIpp)
24、 FFS2 k f 20 k FFS1.2 105f 1FFS20 k f 33 k FFS6.0 4 M33 k f measured up to fourth-order Bessel-Thomson filter defined in IEEE 802.3ba, clause 87.8.9. Each lane according to clause 87.7.2, Table 87-8, and clause 87.8.11 of IEEE 802.3ba G.8251(10)-Amd.1(11)_F6.1-4602 k 33 k 4 M20 k6 IEEE 802.3specific
25、ation limitAmplitude(UIpp)f (Hz)Bessel-Thomsonfilter accordingto 87.8.9 ofIEEE 802.3baFigure 6.1-4 OTL3.4 per lane input sinusoidal jitter tolerance limit Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) 3 2.3) Clause 6.1.4, OTU4 jitter and wander tolerance In Table 6.1-5 and Figure 6.1-5, modify the entrie
26、s for the multilane interface as shown below: Table 6.1-5 OTL4.4 per lane input sinusoidal jitter tolerance limit Frequency f (Hz) Peak-to-peak amplitude (UIpp) FFS20 k f 50 k FFS3 105f 1FFS50 k f 83 k FFS6.0 10 M83 k f measured up to fourth-order Bessel-Thomson filter defined in clause 88.8.8 of IE
27、EE 802.3ba Each lane according to clause 88.7.2, Table 88-8 and clause 88.8.10 of IEEE 802.3ba G.8251(10)-Amd.1(11)_F6.1-51520 k 83 k 10 M50 k6 IEEE 802.3specification limitBessel-Thomsonfilter accordingto clause 88.8.8 ofIEEE 802.3baAmplitude(UIpp)f (Hz)Figure 6.1-5 OTL4.4 per lane input sinusoidal
28、 jitter tolerance limit 2.4) Annex A clause A.5.1.1, ODCa, ODCb, and ODCr jitter generation In Table A.5-1, modify the entries as shown below: Table A.5-1 ODCa, ODCb, and ODCr jitter generation requirements Interface Measurement bandwidth, 3 dB frequencies (Hz) Peak-to-peak amplitude (UIpp) (Note 2)
29、 ODU0 2.5 k to 10 M 0.3 0.5 M to 10 M 0.1 ODU1, OTU1 5 k to 20 M 0.3 1 M to 20 M 0.1 ODU2, OTU2 20 k to 80 M 0.3 4 M to 80 M 0.1 ODU2e 20 k to 80 M 0.3 4 M to 80 M 0.1 4 Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) Table A.5-1 ODCa, ODCb, and ODCr jitter generation requirements Interface Measurement ban
30、dwidth, 3 dB frequencies (Hz) Peak-to-peak amplitude (UIpp) (Note 2) ODU3, OTU3 20 k to 320 M 1.2 (Note 1) 16 M to 320 M 0.14 OTL3.4 FFS20 k to 80 M FFS1.2 (Note 1) 4 M measured up to fourth-order Bessel-Thomson filter defined in clause 87.8.9 of IEEE 802.3ba Each lane as defined in clause 87.7.1, T
31、able 87-7, and clause 87.8.9 of IEEE 802.3ba OTL4.4 FFS50 k to 200 M FFS1.2 (Note 1) 10 M to fourth-order Bessel-Thomson filter defined in clause 88.8.8 of IEEE 802.3ba Each lane as defined in clause 88.7.1, Table 88-7, and clause 88.8.8 of IEEE 802.3ba ODUflex FFS FFS NOTE 1 See clause IV.4 for add
32、itional information. NOTE 2 ODU0 1 UI = ps8.803ns24416.11= ODU1 1 UI = ps2.400ns)48832.2)(239(238= ODU2 1 UI = ps63.99ns)95328.9)(239(237= ODU3 1 UI = ps80.24ns)81312.39)(239(236= OTU1 1 UI = ps 1.375ns)48832.2()255(238= OTU2 1 UI = ps 38.93ns)95328.9()255(237= OTU3 1 UI = ps 25.23ns)81312.39()255(2
33、36= OTL3.4 1 UI = ps 92.98ns)81312.39()255(2364=per lane OTL4.4 1 UI = ps 35.77ns)5328.99()255(2274=per lane Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) 5 2.5) Annex A clause A.5.1.2, ODCp jitter generation In Table A.5-2, modify the entries as shown below: Table A.5-2 ODCp jitter generation requiremen
34、ts Interface Measurement bandwidth, 3 dB frequencies (Hz) Peak-to-peak amplitude (UIpp) (Note 3) CBR0G155 0.5 k to 1.3 M 1.0 65 k to 1.3 M 0.1 CBR0G622 1 k to 5 M 1.0 250 k to 5 M 0.1 1GE 2.52 k to 10 M 1.0 0.673 M to f4(Note 1) TP2, according to clause 38.5, Table 38-10 of IEEE 802.3 ODU0 2.5 k to
35、10 M 1.0 0.673 M to 10 M 0.1 CBR2G5, ODU1 5 k to 20 M 1.0 1 M to 20 M 0.1 CBR10G, ODU2 20 k to 80 M 1.0 4 M to 80 M 0.1 10GE, ODU2e 20 k to 80 M 1.0 4 M to f4(Note 2) Transmit eye mask, defined in clause 52.7.1, Table 52-16 of IEEE 802.3 CBR40G, ODU3 80 k to 320 M 1.0 16 M to 320 M 0.14 40GE, ODU3 M
36、ultilane FFS20 k to 80 M FFS1.0 4 M measured up to fourth-order Bessel-Thomson filter defined in clause 87.8.9 of IEEE 802.3ba Each lane as defined in clause 87.7.1, Table 87-7, and clause 87.8.9 of IEEE 802.3ba 100GE FFS50 k to 200 M FFS1.0 10 M to fourth-order Bessel-Thomson filter defined in clau
37、se 88.8.8 of IEEE 802.3ba Each lane as defined in clause 88.7.1, Table 88-7, and clause 88.8.8 of IEEE 802.3ba ODUflex and its CBRx clients FFS FFS 6 Rec. ITU-T G.8251 (2010)/Amd.1 (04/2011) Table A.5-2 ODCp jitter generation requirements Interface Measurement bandwidth, 3 dB frequencies (Hz) Peak-t
38、o-peak amplitude (UIpp) (Note 3) NOTE 1 f4= bandwidth of fourth-order Bessel-Thomson filter defined in clause 38.6.5 of IEEE 802.3. NOTE 2 f4= bandwidth of fourth-order Bessel-Thomson filter defined in clause 52.9.7 of IEEE 802.3. NOTE 3 1GE 1 UI = 1.251ns = 800 ps CBR2G5 1 UI = 48832.21ns = 401.9 p
39、s CBR10G 1 UI = 95328.91ns = 100.5 ps CBR40G 1 UI = 81312.391ns = 25.12 ps ODU0 ps8.803ns24416.11UI1 = ODU1 1 UI = )48832.2)(239(238ns = 400.2 ps ODU2 1 UI = )95328.9)(239(237ns = 99.63 ps ODU2e 1 UI = )31250.10)(239(237ns = 97.78 ps ODU3 1 UI = )39.81312)(239(236ns = 25.43 ps ODU3 (Multilane) 1 UI
40、= )39.81312)(239(4236 ns = 99.21 ps ODU4 (Multilane) 1 UI = )99.53280)(239(4227 ns = 38.17 ps Printed in Switzerland Geneva, 2012 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, servi
41、ce operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, soun
42、d programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound pr
43、ogramme and television transmission circuits Series O Specifications of measuring equipment Series P Terminals and subjective and objective assessment methods Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telem
44、atic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
