1、STDSITU-T RECMN Q-75b-ENGL L777 4bZ592 Db3929b 759 m INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Q.756 (06i97) SERIES Q: SWITCHING AND SIGNALLING Specifications of Signalling System No. 7 - Signalling System No. 7 management Guidebook to Operations, Ma
2、intenance and Administration Part (OMAP) ITU-T Recommendation Q.756 (Previously CCITT Recommendation) STD-ITU-T RECMN Q.7Sb-ENGL 1997 9 LiBbZS9L Ob39277 b95 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE INTERNATIONAL AUTOMATIC AND SEMI-AUTOMAT
3、IC WORKING FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4 AND No. 5 SPECIFICATIONS OF SIGNALLING SYSTEM No. 6 SPECIFICATIONS OF SIGNALLING SYSTEM RI SPECIFICATIONS OF SIGNALLING SYSTEM R2 DIGITAL EXCHANGES INTERWORKING OF SIGNALLING SYSTEMS SPECIF
4、ICATIONS OF SIGNALLING SYSTEM No. 7 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS General Message transfer part (MTP) Signalling connection control pari (SCCP) Telephone user part (TUP) ISDN supplementary services Data user part Signalling System No. 7 management ISDN user part Transaction capabiliti
5、es application part Test specification Q3 interface DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 PUBLIC LAND MOBILE NETWORK INTERWORKING WITH SATELLIT MOBILE SYSTEMS I NTE L LI G ENT N ETWO R K BROADBAND ISDN Q.1-Q.3 Q .4-Q. 59 Q. 60-Q. 99 Q.100-Q.119 Q. 120-Q.249 Q.250-Q.309 Q.31 O-Q. 399 Q.400-Q.499
6、 Q. 500-Q. 599 Q.600-Q.699 Q.700-Q. 849 (2.700 Q.701-Q.709 (2.71 1-Q.719 Q.720-Q.729 Q. 730-Q. 739 Q.740-Q.749 Q.750-Q.759 Q.760-Q.769 Q.770-Q.779 Q. 7 80-Q. 799 Q. 8004.849 Q. 8 50-Q.999 Q. 1000-Q. 1 O99 Q. 1 1 OO-Q. 11 99 Q. 1200-Q. 1999 Q. 2 O OO-Q.2999 For further details, please refer to ITU-T
7、List of Recommendations, ITU-T RECOMMENDATION Q.756 GUIDEBOOK TO OPERATIONS, MAINTENANCE AND ADMINISTRATION PART (OMAP) Summary This Recommendation “Guidebook to Operations, Maintenance and Administration Part (OMAP)“ collects SS7 background knowledge which is important to using the OMAP Recommendat
8、ions. This is relevant for: - - - This Guidebook refers to the White Book version of OMAP. network operating administration, deciding on their application; provider of Operating Systems (OSs) for TMN; operator working at non-TMN terminals. Source ITU-T Recommendation 4.756 was prepared by ITU-T Stud
9、y Group 11 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 5th of June 1997. STD-ITU-T RECMN Q-75b-ENGL 1777 D Li8b2572 b37277 468 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU T
10、elecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The 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 Stand
11、ardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution N
12、o. 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are 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
13、 a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicabilit
14、y of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU hadhad not received notice of intellectual property, protected by patents, which may be required to imple
15、ment this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1997 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means,
16、 electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Il Recommendation 4.756 (06/97) STD-ITU-T RECMN Q.75b-ENGL 1997 m 48b259L Ob39300 TOT m 1 2 3 4 5 5.1 5.2 5.3 5.4 6 6.1 6.2 6.3 6.4 7 7.1 7.2 7.3 CONTENTS Scope References Definitions Abbrevi
17、ations . Guidebook to Q.75 1 “Signalling System No . 7 Managed Objects“ . Point of view . Functional preconditions 5.2.1 Scope of Recommendation Q.751 . 5.2.2 Dynamic aspects 5.2.3 Synchronization aspects 5.2.4 Management on NE level is not always sufficient 5.2.5 Precautions 5.2.6 Restrictions in m
18、anageability Handling prescriptions First collection of guiding information to Recommendation Q.75 1 5.4.1 Managing of MTP . 5.4.2 Managing of ISUP . 5.4.3 Managing of SCCP . 5.4.4 Managing of TCAP . 5.4.5 Managing of OMAP Guidebook to Q.752 “Monitoring and Measurements for Signalling System No . 7
19、Networks“ . General . Impact of measurements . Measurement non-obligatory, resp . notification functionally obligatory . Accounting of MTP and SCCP traffic and data protection Guidebook to Q.753 “Signalling System No . 7 Management Functions MRVT. SRVT and CVT“ MRVT . 7.1.1 Dynamic aspects 7.1.2 Gua
20、rdtimer T1 . 7.1.3 Summarization SRVT CVT Recommendation Q.756 (06/97) Page 1 1 2 2 3 3 3 3 3 4 4 4 4 5 5 5 5 5 5 5 . 111 STD-ITU-T RECMN Q.75b-ENGL 1977 LiBb257L Ob39301 94b Page 8 Guidebook to 4.754 “Signalling System No. 7 Management ASE Definitions for MRVT, SRVT and CVT“ . 9 9 Guidebook to Q.75
21、5 “Signalling System No. 7 Protocol tests“ . 9 9.1 MTP Tester (MT) . 9 9.1.1 Several tests running independently 9 MTP Test running end-to-end across the whole SS7 network 9.1.2 10 iv Recommendation Q.756 (06/97) Recommendation Q.756 GUIDEBOOK TO OPERATIONS, MAINTENANCE AND ADMINISTRATION PART (OMAP
22、) (Geneva, I99 7) 1 Scope Whereas Recommendation 4.750 is an overview of OMAP architecture and its functions, the basic idea of this Guidebook to OMAP Q.756 is to collect background knowledge which is important in using the OMAP Recommendations be it as: - - - This Guidebook refers to the White Book
23、 version of OMAP. network operating administration, deciding on their application; provider of Operating Systems (OSs) for TMN; operator working at non-TMN terminals. 2 References The following ITU-T Recommendations, and other references contain provisions which, through reference in this text, cons
24、titute 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 possibility of applying the most recent edition of t
25、he Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. - ITU-T Recommendation A.3 (1 996), Elaboration and presentation of texts for Recommendations of the ITU Telecommunication Standardization Sector. ITU-T Recommendation M.
26、3010 (1996), Principles for a telecommunications management network. ITU-T Recommendation Q.700 (1 993), Introduction to CCITT Signalling System No. 7. ITU-T Recommendation 4.70 1 (1 993), Functional description of the Message Transfer Part (MTP) of Signalling System No. 7. CCITT Recommendation 4.70
27、2 (1 988), Signalling data link. ITU-T Recommendation Q.703 (1996), Signalling link. ITU-T Recommendation 4.704 ( 1996), Signalling network functions and messages. ITU-T Recommendation 4.705 (1 993), Signalling network structure. CCITT Recommendation Q.707 (1 988), Testing and maintenance. ITU-T Rec
28、ommendation 4.752 (1 997), Monitoring and measurements for Signalling System No. 7networks. ITU-T Recommendation Q.753 (1 997), Signalling System No. 7 management functions MR VT, SR VT and CVT and dejtnition of the OMASE-User. ITU-T Recommendation 4.754 (1 997), Signalling System No. 7 management A
29、pplication Service Element (ASE) definitions, ITU-T Recommendation 4.755 (1 993), Signalling System No. 7protocol tests. - - - - - - - - - - - - Recommendation Q.756 (06/97) 1 STD-ITU-T RECMN Q-75b-ENGL 1997 LiAb259L Ob39303 719 - ITU-T Recommendation Q.811 (1997), Lower layer protocol profiles for
30、the Q3 and X interfaces. ITU-T Recommendation 4.812 (1997), Upper layer protocol profiles for the Q3 and X interfaces. - ITU-T Recommendation X.701 (1997), Information technology - Open Systems Interconnection - Systems management overview. - CCITT Recommendation X.7 1 O (1991), Common management in
31、formation service definition for CCITT applications. - CCITT Recommendation X.721 (1992), Information technology - Open Sstems Interconnection - Structure of management information: Defmition of management information. - CCITT Recommendation X.734 (1 992), Information technology - Open Systems Inter
32、connection - Systems Management - Event Report Management Function. - 3 Definitions This Recommendation makes use of the following terms defined in Recommendation M.3010: a performance management; b) configuration management; cl fault management; d) Telecommunications Management Network (TMN). This
33、Recommendation makes use of the following term defined in Recommendation X.70 1 : - notification. This Recommendation makes use of the following term defined in Recommendation X.710: - attribute. 4 Abbreviations Abbreviations regarding the MTP are listed in Table 1/Q.704. Additionally, the following
34、 abbreviations are used throughout this Recommendation. ASE Application Service Element CIC Circuit Identification Code CVT Circuit Validation Test MRVT MTP Route Verification Test MT MTP Tester NE Network Element NM Network Management OMAP os Operating System SP Signalling Point SRVT SCCP Route Ver
35、ification Test Operations, Maintenance and Administration Part 2 Recommendation 4.756 (06/97) ss7 Signalling System No. 7 STP Signalling Transfer Point TFC Transfer Controlled (Message) TMN Telecommunications Management Network 5 Guidebook to Q.751 “Signalling System No. 7 Managed Objects“ 5.1 Point
36、 of view The Guidebook refers to the definitions on Network Element (NE) layer. It provides SS No. 7 knowledge which can be used in helptexts or warnings against dangerous management activities. The Guidebook does not define the tasks to be done within the OS (on Network layer), e.g. to combine the
37、NEs of both ends of a link. It only deals with some aspects of OS, e.g. it lists the NE object classes for which coordinated activities are necessary on both ends of a Network Management entity. It also does not deal with possibly coordinated activities from one OS to several Signalling Points (SPs)
38、. 5.2 Functional preconditions 5.2.1 Scope of Recommendation 4.751 Recommendation 4.751 does not describe all aspects of the interface between OS and NE for managing SS7. Recommendation 4.751 does not define the amount of data, which is to be held consistent in the OS and the NEs and which of these
39、data is master, which is slave. The lower layers of the Q3 Interface can be derived from Recommendations Q.811 and 4.812 by assembling packages of functionalities from their various mandatory and optional aspects (“profiling“). 5.2.2 Dynamic aspects It is assumed that the implementation of the 43 in
40、terface takes into consideration also mass events within the managed Signalling Points (SP). These mass events may cause notifications, for example, about all circuits, all links, all link sets, etc. It is also assumed that mass events which involve all SPs served by an OS at one time (network outag
41、e) are taken into consideration when structuring an OS. As “mass events“ are denoted failures which force many SS7 managed objects to change their states, a massive flow of notifications could go far beyond the capacity of Q3 or the operating systems. It is assumed that OS1 management functions (Rec
42、ommendation X.734) are applied in NE and OS and used by the operator of the network. By the “event forwarding discriminator“, for example, filters can be defined to discriminate which notifications should be passed to the OS and which should not. But these filters do not take into account how many n
43、otifications or if a notification with a specific content has already been sent in the specific situation. Therefore this mechanism is not sufficient to prevent mass events. Recommendation Q.756 (0697) 3 STD-ITU-T RECMN Q.75b-ENGL 1777 4db257L 0b37305 571 D 5.2.3 Synchronization aspects 5.2.3.1 Supp
44、ort for maintaining consistency between NE and OS are outside the scope of Recommendation 4.75 1. Synchronization between NE and OS 5.2.3.2 Synchronization between Network Element and Network Management Level For the following NE object classes, coordinated activities are necessary on both ends of a
45、 NM entity: - signLinkSetTp; - signLinkTp; - si gnDataL inkT p. 5.2.4 Management on NE level is not always sufficient In case of failures, analysis might be done as for example to send a service crew to the right place. Then analysis only on network element level could be insufficient. For example i
46、n case of a link failure: If there is no failure within the signalling terminal of the network element, the operationalstate of the signDataLinkTp does not reliably indicate. if the reason for the failure lies within the terminal at the other end of the link or within the transmission line between b
47、oth the terminals. Only together with the analysis of the terminai of the other end is it possible to delimit the failure. 5.2.5 Precautions Some management activities, especially on SS7, are able to cause a network outage by only one action - possibly done erroneously (example: Administratively blo
48、cking a SignRouteSetNePart). Therefore, it is assumed that the OS employs a system to prevent damages by management activities such as: - - - warnings before executing dangerous commands; uneraseable storing of dangerous commands; special authorization for special operators for special dangerous com
49、mands. 5.2.6 Restrictions in manageability The Recommendations of the SS7 protocol, 4.700 to 4.706, did not define exactly what entities are to be managed. For a certain kernel the manageability, e.g. of links, link sets, etc., derives indirectly from the SS7 functions. Against that in a wide “gray“ area implementations differ in the possibilities they offer to management. Some examples are: - modifications of timers; - load sharing key; - change of error correction method for a link. Thus it may occur that actions are requested from the OS-side which will not be executed on the SS7
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