1、 67 International Telecommunication Union ITU-T Series GTELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 46(05/2009) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS G-PON interoperability test plan between optical line terminations and optical network units ITU-T G-s
2、eries Recommendations Supplement 46 ITU-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-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTIC
3、S 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 RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION
4、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 ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G
5、.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. G series Supplement 46 (05/2009) i Supplement 46 to ITU-T G-series Recommendations G-PON intero
6、perability test plan between optical line terminations and optical network units Summary Supplement 46 to ITU-T G-series Recommendations defines a test plan whose purpose is to verify interoperability between a G-PON OLT and ONU. Emphasis is placed on test cases that address the G-PON physical layer
7、 (ITU-T G.984.2), the TC layer (ITU-T G.984.3) and low-level components of the management layer (ITU-T G.984.4). Service layer test cases are out of scope for this supplement. Interoperability testing is conducted by or on behalf of four interests: the OLT vendor, the ONU vendor, one or more network
8、 operators who are potential customers, and possibly a third-party testing lab. For each test case, the supplement provides detailed information on: purpose; reference standard; preconditions and dependencies; test set-up; test equipment; test procedure; pass fail criteria. Source Supplement 46 to I
9、TU-T G-series Recommendations was agreed on 15 May 2009 by ITU-T Study Group 15 (2009-2012). ii G series Supplement 46 (05/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technol
10、ogies (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 view to standardizing telecommunications on a worldwide basis. The World Telecomm
11、unication 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 Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas
12、 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 publication, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operatin
13、g agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory provisions (to ensure e.g. interoperability or applicability) and compliance with the publication is achieved when all of these mandatory provisions are met. The words “shall“ or some othe
14、r 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 publication is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implement
15、ation of this publication 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, whether asserted by ITU members or others outside of the publication development process. As of th
16、e date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult
17、the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2010 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. G series Supplement 46 (05/2009) iii CONTENTS Page 1 Scope 1 2 Unlabelled 2 3 Interoperability g
18、uidelines 2 3.1 Overview . 2 3.2 PON initialization and management 2 4 Test configuration and equipment 2 4.1 Network configuration 2 4.2 Equipment requirements . 3 4.3 Network equipment matrix 3 4.4 Vendor features comparison matrix 3 5 Physical layer compatibility verification 3 5.1 Mean launch po
19、wer . 3 5.2 Receiver sensitivity . 11 5.3 Receiver overload 16 5.4 OLT and ONU emission wavelengths . 19 6 ONU turn-up and management. 22 6.1 ONU start-up . 22 6.2 TC-layer OAM operation 28 6.3 Security functionality 33 7 OMCI-related verification 36 7.1 ONU management via OMCI . 36 7.2 OMCI equipme
20、nt management . 60 8 System performance tests . 62 8.1 Overview . 62 8.2 Cold PON, multi-ONU 63 8.3 Warm PON, multi-ONU . 64 8.4 Receiver performance . 67 9 Fault recovery . 70 9.1 PON (optical network) faults 70 9.2 Equipment faults . 78 10 Optional functionality . 81 10.1 Dynamic bandwidth allocat
21、ion 81 10.2 Forward error correction . 82 10.3 Duplex PON operation 83 Appendix I ODN test configurations 84 I.1 Configuration #1 Near cluster 84 I.2 Configuration #2 Far cluster 85 I.3 Configuration #3 Near EUT, far cluster . 86 I.4 Configuration #4 Far EUT, near cluster . 86 Appendix II References
22、 88 Appendix III Acronyms 89 iv G series Supplement 46 (05/2009) Introduction This supplement defines a test plan whose purpose is to verify interoperability between a G-PON OLT and ONU. Emphasis is placed on test cases that address the G-PON physical layer (ITU-T G.984.2), the TC layer (ITU-T G.984
23、.3) and low-level components of the management layer (ITU-T G.984.4). In this supplement, the OLT is regarded as the baseline equipment, against which the ONU is evaluated. This is not to be understood as an assertion that the OLT is necessarily right in the event of incompatibility, merely to refle
24、ct the reality that a network operator is likely to have OLTs in place and is interested in qualifying additional ONUs for use on these OLTs. From this perspective, the unit under test is an ONU. Interoperability testing is conducted by or on behalf of four interests: the OLT vendor, the ONU vendor,
25、 one or more network operators who are potential customers, and possibly a third-party testing lab. As a preliminary to an interoperability testing campaign, all interests are expected to agree on features, functions and configurations. Only the features supported by both OLT and ONU need be tested
26、but all test cases need to be addressed with either a test result or an indication why there is no result (not supported, etc.). As to test configurations, the vendors may be requested to supply equipment (of a given vintage), and the network operator may be interested in testing in the presence of
27、other ONU makes and models, or with particular ODN characteristics. The testing lab needs to have the necessary power, space, test equipment and expertise for the agreed campaign. In this supplement, the manufacturers are referred to as the OLT vendor and the ONU vendor respectively, while tests are
28、 deemed to be conducted by a test operator. The term ONU includes ONTs as well, and the term OLT includes the entire network element at the head end of the PON, not just the G.984 interface. G series Supplement 46 (05/2009) 1 Supplement 46 to ITU-T G-series Recommendations G-PON interoperability tes
29、t plan between optical line terminations and optical network units 1 Scope This clause describes the scope of G-PON interoperability testing. It is important to understand what an interoperability test plan is not, as well as what it is. An interoperability test project includes only features and ca
30、pabilities that are claimed to be supported by both the OLT and the ONU. To apply a single interoperability test plan to all equipment combinations, the test report lists features and capabilities that are not claimed to be supported by one or both of the equipments, but tests of such cases are not
31、to be regarded as failures. The reader of the test report determines the importance of a not-supported feature. An interoperability test plan evaluates the ability of an OLT and an ONU to deliver subscriber services. Services are standardized to a greater or lesser extent; the definition of a DS1 le
32、aves very little to the imagination. However, services frequently have performance aspects that are more suitable for characterization than for Pass/fail results. An example might be the sustainable throughput of an Ethernet port or the echo performance of a voice channel. This supplement is based o
33、n ITU-T G.984.x-series of Recommendations and other standards. It expects that deviations from standards be recorded in the test results. Many test cases also characterize the quality or performance of service delivery. Compliance with standards is neither wholly necessary nor sufficient to guarante
34、e that an OLT-ONU combination is suitable for a network providers needs. An interoperability test plan confirms that a given ONU functions properly when installed on an ODN with other ONUs. In general, the other ONUs can differ arbitrarily in make, model and capability from the ONU under test. The v
35、endors and the test lab should agree in advance on a representative population of ONUs. An interoperability test plan verifies that an ONU can be fully managed through the OLT, within the scope of capabilities it claims to support. This includes all pertinent FCAPS functions, for example initializat
36、ion, provisioning, testing, fault isolation and maintenance, PM, backup, restoration and software upgrade. An interoperability test plan is not a gauge of standards compliance. A proprietary combination of OLT and ONU could well be completely interoperable. However, the standards form the basis of t
37、he interoperability test plan, in the expectation that they will closely describe most OLTs and ONUs. An interoperability test plan assumes a black-box view of the OLT-ONU combination. Information visible only through mechanisms such as debug ports is not valid as a test criterion. From a black-box
38、perspective, some tests are clearly not possible, for example the ability for the OLT to controllably inject faults such as bit errors or send invalid PLOAM messages. Some of the test cases are nevertheless written to use such capabilities, if they exist. If the equipments do not expose such special
39、ized mechanisms, it may be simply impossible to perform the test cases, and there is to be no implication that somehow it should have been possible. Ancillary equipment such as an uninterruptible power supply (UPS) or a DSL modem is not intrinsically within the scope of an OLT-ONU interoperability t
40、est plan. However, if a vendor always recommends a given ancillary equipment for use with an ONU or OLT, the ancillary equipment can be included by agreement. The test is not intended to resolve to a level as to isolate the operability of ancillary equipment or the OLT-ONU. With the exception of str
41、ess testing, in which the purpose of the test case is to oversubscribe resources of the network under test, any test case can fail if the test causes disruption to services that are not part of the test case. For the purpose of interoperability testing, it is assumed that all testing is performed wi
42、th the temperature in the range of 60 to 80F (16 to 27C) and the relative humidity in the range of 20% to 60%. If testing is performed under different environmental conditions, then any such deviations should be clearly noted in the resulting test report. If different environmental conditions are re
43、quired for a specific test case within this supplement, then these conditions will be explicitly stated in the test case. 2 G series Supplement 46 (05/2009) 2 Unlabelled This clause intentionally left blank. 3 Interoperability guidelines 3.1 Overview In preparation for interoperability test cycles,
44、this clause provides ONU and OLT vendors with implementation guidelines created to enable multi-vendor interoperability. Interoperability testing between the ONU and OLT uses the ITU-T G.984.x-series Recommendations as the guidelines for all tests. This clause identifies the functionality to be impl
45、emented based on these specifications. Both vendors should complete PICS documents for ITU-T G.984.2, ITU-T G.984.3 and ITU-T G.984.4 as a first step in planning the test campaign. 3.2 PON initialization and management 3.2.1 PON initialization An ONU must be able to successfully initialize with the
46、OLT using the activation method described in ITU-T G.984.3. 3.2.2 Support of equipment management entities The ONU/OLT should support OMCI and the managed entities defined in ITU-T G.984.4. The test plan assumes that OMCI is supported. 3.2.3 Downstream encryption Downstream encryption is an integral
47、 part of the security of the system. It is evaluated to verify that it does not adversely affect service. 4 Test configuration and equipment 4.1 Network configuration Figure 1 shows the test configuration for the interoperability testing of the OLT and ONU. While data service interoperability is out
48、 of scope for this test plan, several test cases do rely on the ability to establish a basic data traffic flow between the OLT and ONU. The OLT and ONU vendors will be expected to work together to support this pre-condition. Data test sets should be available for each side of the network. Temperatur
49、e and humidity within the laboratory work spaces should be monitored using calibrated temperature and humidity indicators, and should be recorded throughout the testing. Figure 1 Interoperability test configuration ONU AOLT Ethernet Simulation Equipment ONU BONU NG series Supplement 46 (05/2009) 3 4.2 Equipment requirements The following test equipment is required: Data test equipment A single test unit with two interfaces should be available ONU At least three systems
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