1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU M.1532 (02/2000) SERIES M: TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHON E CI RCU ITS, TELEGRAPHY, FACS I M I LE AND LEASED CIRCUITS Designations and information exchange Network m
2、aintenance service performance agreement (MSPA) ITU-T Recommendation M. 1532 (Formerly CCITT Recommendation) ITU-T M-SERIES RECOMMENDATIONS TMN AND NETWORK MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS Introduction and general principl
3、es of maintenance and maintenance organization International transmission systems International telephone circuits Common channel signalling systems International telegraph systems and phototelegraph transmission International leased group and supergroup links International leased circuits Mobile te
4、lecommunication systems and services International public telephone network International data transmission systems M. 1 0-M.299 M.300-M.559 M.560-M.759 M.760-M.799 M.800-M.899 M.900-M.999 M. 1000-M. 1099 M.llOO-M.1199 M. 1200-M. 1299 M. 1300-M.1399 Designations and information exchange M.1400-M.199
5、9 International transport network M.2000-M.2999 Telecommunications management network Integrated services digital networks Common channel signalling systems M.3000-M.3599 M.3600-M.3999 M.4000-M.4999 For further details, please re$er to the list of ITD-T Recommendations. ITU-T Recommendation M.1532 N
6、etwork maintenance service performance agreement (MSPA) Summary This ITU-T Recommendation, making reference to the basic principles of the management of the Grade Of network Maintenance Services (GOMS) at the Maintenance Service Customer Contact point (MSCC), provides to both a Maintenance Service C
7、ustomer (MSC) and a Maintenance Service Provider (MSP) of any Maintenance Service (MS), specific guidelines to establish and manage the effectiveness of an appropriate network2 Maintenance Service Performance Agreement (MSPA). An MSPA is a set of appropriate procedures and targets related to specifi
8、c performance parameters, action plans and relevant action points which are formally or informally agreed between an MSC and an MSP, in order to support ITU-T Recommendations and achieve and maintain the agreed GOMS under all possible operational circumstances. If both MSC and MSP wish to further im
9、prove the previously agreed GOMS, the MSPA guidelines may also be used. The MSPA may be an integral part of a contract or an informal agreement between the parties involved. Source ITU-T Recommendation M.1532 was prepared by ITU-T Study Group 4 (1997-2000) and approved under the WTSC Resolution 1 pr
10、ocedure on 4 February 2000. Keywords Action point, actions plan, grade3 of maintenance service, maintenance service4, maintenance service contract5, maintenance service customer contact points, maintenance service customefl, maintenance service element(s)4, maintenance service informal agreements, m
11、aintenance service performance agreement7, maintenance service performance agreement management, maintenance service performance agreement management difficulty index, maintenance service providei.4, maintenance service unavailabiliw, management of the grade of maintenance service8, quality of servi
12、ceg. The GOMS concepts and its management are described in ITU-T Recommendation M.1539. The word network is used here to emphasize that the MSs are related to the entire telecommunication network and it will be avoided further within the text. For the purpose of this ITU-T Recommendation the terms:
13、grade of service, service level, service performance are similar. The definition is reported in ITU-T Recommendation M. 1539. 5 The definition is reported in ITU-T Recommendation M.1537. For a generic service the term “Service Access Point (SAP)“ is often used. 7 Similar terms such as: “Service Leve
14、l Agreement (SLA)“, “Service Level Guarantee (SLG)“ and “Service Quality Agreement (SQA)“ are currently used in the area of telecommunications services. ITU-T Recommendation E.801, in particular, shows the main SQA concepts and the framework to be used by Network OperatorsProviders and/or Service Pr
15、oviders for any switched or dedicated telecommunication service. ITU-T M.1532 (02/2000) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent orga
16、n 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 Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the
17、 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 of information technology which fall within ITU-Ts purview, the necessary standards are
18、 prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that th
19、e 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, whether asserted by ITU members or others outside of the Recommendation
20、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, implementors are cautioned that this may not represent the latest information and are t
21、herefore strongly urged to consult the TSB patent database. o ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing rom the ITU. The main conce
22、pts are reported in ITU-T Recommendation M. 1539. 9 In the area of concepts relating to “quality of service“ and “network performance“ a simple and consistent set of terms and definitions is reported in ITU-T Recommendation E.800. ITU-T M.1532 (02/2000) 11 CONTENTS 1 2 3 4 5 6 7 7.1 7.2 7.3 8 8.1 8.
23、2 8.3 9 Scope . References . Abbreviations and acronyms . Terms and definitions . MSPA objectives and benefits MSPA for GOMS management MSPA overview MSPA Structure and basic process functions . MSPA implementation and operation . MSPA Reference Model . MSPA management Objectives of MSPA management
24、Brief overview of MSPA management . Criteria to be used for MSPA management 8.3.1 The MSPA Management Difficulty Index (MMDI) Examples of MSPA Annex A . Example of definition of MSPA Management Difficulty Index (MMDI) Appendix I . Examples of MSPA for Maintenance Services (MSs) related to specific m
25、anaged areas . Example of MSPA for MSs related to Leased Circuit Service (LCS) I . 1 Introduction . 1.2 MS Performance Monitoring 1.2.1 Maintenance Service Elements (MSEs) 1.2.2 MSPA for the GOMS MS Performance and Fault Management 1.3.1 Maintenance Service Elements (MSEs) 1.3.2 MSPA for GOMS 1.4 MS
26、 Restoration . 1.4.1 Maintenance Service Elements (MSEs) 1.4.2 MSPA for GOMS 1.3 Appendix II - Examples of MSPA for Maintenance Services (MSs) related to specific managed areas - Example of MSPA for MSs related to Videoconferencing service . II . 1 Introduction . 11.2 Maintenance Service (MS) . ITU-
27、T M.1532 (02/2000) Page 1 1 2 3 3 4 5 5 5 6 6 6 6 8 8 10 10 13 13 13 13 13 14 14 14 16 16 16 16 16 16 . 111 11.3 11.4 Maintenance Services Elements (MSEs) MSPA for the GOMS . II.4.1 AP 1 : Videoconference quality improvement II.4.2 II.4.3 AP2: Videoconferencing user training AP3: Performance index v
28、alue rereshing . Appendix III - Examples of MSPA for Maintenance Services (MSs) related to specific managed areas - Example of MSPA for MSs related to Internet services . III . 1 Introduction . III.2 Maintenance Service (MS) . III.3 Maintenance Services Elements (MSEs) III.4 MSPA for the GOMS . I11.
29、4.1 AP1: Performance improvement of trunk network . I11.4.2 AP2: Performance improvement of access network Page 16 17 17 17 17 17 17 17 17 17 17 18 iv ITU-T M.1532 (02/2000) Introduction In todays telecommunications environment, the provisioning of all featwes of any MS requires more and more an app
30、ropriate inter-operability between all the various maintenance organizations within different Network Operators/Service Providers and Customers which are involved in the MS domain concerned. In this multiple service providers situation, according to ITU-T Recommendation M.1539, in order to achieve t
31、he overall GOMS objective as agreed for any specific MS between an MSC and an MSP in a contract or in an informal agreement, it is necessary to properly manage the overall GOMS. Considering both MSC and MSP point of view, an efficient GOMS management is very important as it is strictly related to th
32、eir individual business. At present, in particular, each MSP focuses to assure the “honouring at the operational level“ of all contracts or informal agreements regarding any offered MS which are stipulated with every MSC. Nevertheless, in some cases, the GOMS agreed objective is very hard to attain
33、or difficult to maintain. This is generally due to frequent instability, or sometimes to sudden drops of the performance values with respect to the specified limitdtargets of one or more of the performance parametershdices contributing to the overall GOMS. These parameterdindices are related to all
34、procedures of each process pertaining to a particular Maintenance Service Element (MSE) within the adopted Operational Procedures Selection for the management, achievement and improvement of the agreed GOMS (OPSG). If these events of performance degradation or dropping are not analysed immediately,
35、and their causes removed in a reasonable time, this will lead to a permanent condition of “unacceptable MS/GOMS“. In this case, in order to achieve the overall agreed GOMS, it is necessary to review carefully all initial performance parameters regarding each procedure of involved processes and relev
36、ant performance indices, and also whether their assessments/measurements are still valid or whether they need to be revised, or completely changed with new ones. In the above context, the most suitable current way to manage all QoS aspects of any MS is to use an MSPA between an MSC and an MSP of the
37、 involved MS. The MSPA may be an integral part of the contract or the informal agreement between the parties concerned. An MSPA normally implies an appropriate set of procedures and targets, formally or informally agreed and signed between an MSC and an MSP in a specified actions plan, and relevant
38、action points. Every actions plan has individual objectives and specified modalities to be carried out with a precise deadline for its completion or, when necessary, its revision or update. Another important issue to consider is the ever-increasing demand for an efficient MSPA management, either con
39、sidering a simple situation of one MSPA or when, due to a great number of simultaneous MSPAs, to satisfy the pressure of MSPA requests, several MSPAs Co-exist. To ensure an efficient management of any number of required MSPAs, it is necessary to find out suitable criteria such as the continuous eval
40、uation of an appropriate index representing the difficulty level driven by all technical and commercial business aspects related to the MUGOMS concerned. An efficient MSPA management may imply an increase of the operational cost above the values which were related to the previous contract or informa
41、l agreement as stipulated between the MSC and the MSP. It is to be noted that all concepts, methodologies, objectives and any possible target as described in an MSPA, may also be applied when more than one MSP is involved in the interested MS. That is, in particular, the case of the MUGOMS agreed be
42、tween an MSP and another MSP where, in practice, one acts as an MSC and the other as an MSP. Similar considerations apply when an MSPA is signed between Network Operators and/or between Network Operators and Service Providers. In both cases, one of the Network Operators or Service Providers plays th
43、e role of the MSP and the other the role of the MSC. ITU-T M.1532 (02/2000) V ITU-T Recommendation M.1532 Network maintenance service performance agreement (MSPA) 1 Scope An MSPA provides guidelines to any MSC and MSP of the interested MS, in order to agree upon and carry out an appropriate actions
44、plan, to ensure the effective achievement or, under specific requests, even the improvement of the GOMS. This ITU-T Recommendation specifies: a) b) c) This ITU-T Recommendation does not speciQ: a) the MSPA general aspects to achieve the agreed GOMS based on QoS general requirements rom both MSC and
45、MSP; the MSPA structure associated with basic process functions that characterize the nature of MSPA and the MSPA reference model; MSPA management criteria and relevant objectives. any value for overall GOMS or its relevant performance parameterdindices being agreed in an MSPA, or in an MSPNcontract
46、 or in an informal agreement between an MSC and an MSP; any particular action involved in an MSPA to establish and manage all types of OAM performance parameterdindices and relevant values for any specific MS. b) c) 2 References The following ITU-T Recommendations and other references, contain provi
47、sions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the pos
48、sibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. 11 2 3 4 5 6 7 ITU-T Recommendation M.60 (1993), Maintenance terminoloa and deflnitions. ITU-T Recommendation M. 1230 (19
49、96), Method to improve the management of operations and maintenance processes in the International Telephone Network. ITU-T Recommendation M. 1530 (1999), Network maintenance information. ITU-T Recommendation M. 1535 (1996), Principles for maintenance information to be exchanged at customer contact point (WICC). ITU-T Recommendation M. 1537 (1997), Deflnition of maintenance information to be exchanged at customer contact point (WICC). ITU-T Recommendation M. 1539 (1999), Management of the grade of network maintenance services at the maintenance service customer contact po
