1、I NTERNATIONAL TELECOMMUNICATION UN ION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU M.3207.1 (05/9 6) SERIES M: MAINTENANCE: INTERNATIONAL TRANSMISSION SYSTEMS, TELEPHONE CIRCUITS, TELEGRAPHY, FACSIMILE AND LEASED CIRCUITS Telecommunications management network TMN management service: maint
2、enance aspects of B-ISDN management ITU-T Recommendation M.3207.1 (Previously 4CITT Recommendation,) STD ITU-T RECMN M-3207-L-ENGL L79b 48b259L Ob21954 44T FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (IT). The ITU-T
3、is responsible for studying technical, operating and tariff questions and issuing Recommen- dations 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 topics for st
4、udy by the IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the IT-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12,1993). ITU-T Recommendation M.3207.1 was prepared by IT-T Study
5、Group 4 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 12th of May 1996. NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O IT 1996 All rights res
6、erved. 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 from the ITU. STD-ITU-T RECMN M.3207-L-ENGL 177b 48b2571 Ob21755 38b = CONTENTS Page 1 Scope 1 2 References 1 3
7、Abbreviations 1 . 4 TMN management service description based on GDMS . 2 4.1 Management service description 2 4.2 Management goals 2 4.3 Management context description 2 4.4 Architecture 9 Recommendation M.3207.1 (0996) I SUMMARY This Recommendation describes the TMN management service for the maint
8、enance aspect of B-ISDN management with using GDMS (Guideline for the Definition of TMN Management Services). KEYWORDS B-ISDN, Telecommunications Management Network (TMN), TMN management service. 11 Recommendation M.3207.1 (05/96) STD-ITU-T RECMN M-3207*1-ENGL L99b 48b2591 Ob21757 157 m Recommendati
9、on M.3207.1 TMN MANAGEMENT SERVICE: MAINTENANCE ASPECTS OF B-ISDN MANAGEMENT (Geneva, 1996) 1 Scope This Recommendation describes the TMN management service for the maintenance aspect of B-ISDN management. 2 References The following Recommendations and other references contain provisions which, thro
10、ugh 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 possibility of apply
11、ing the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. IT-T Recommendation M.3610 (1996), Principles for applying the TMN concept to the management Of B-ISDN. ITU-T Recommendation 1.3 1 1 (1993
12、), B-ISDN general network aspects. ITU-T Recommendation G.803 (1993), Architectures of transport networks based on the Synchronous Digital Hierarchy (SDH). CCIT Recommendation M.3400 (1992), TMN managementfunctions. CCITT Recommendation M. 1400 (1992), Designations for internarional nemorks. ITU-T R
13、ecommendation 1.610 (1993, B-ZSDN operation and maintenance principles andfunctions. ITU-T Recommendation M.3020 (1 993, TMN interface specification methodology. CCITT Recommendation M.3200 (1992), TMN management services: Overview. ITU-T Recommendation 1.326 (1995), Functional architecture of trans
14、port networks based on ATM. Abbreviations For the purposes of this Recommendation, the following abbreviations apply: ATM Asynchronous Transfer Mode GDMS MSP Management Service Provider NEF Network Element Function OAM Operation, Administration and Maintenance OSF Operations System Function TIB Task
15、 Information Base Guidelines for the Definition of TMN Management Services Recommendation M.3207.1 (05/96) 1 STD-ITU-T RECMN M.3207-1-ENGL L99b 48b2591 Ob21958 095 TMN Telecommunications Management Network U”NI User Network InterfacelNetwork Node Interface VPNC Virtual PatWirtual Channel 4 TMN manag
16、ement service description based on GDMS This clause presents the TMN management service based on GDMS, which is specified in Recommendation M.3020 7. The GDMS makes use of references to the functions in Recommendation M.3400 4. The references in this Recommendation are referring to the published 199
17、2 version of Recommendation M.3400. Best efforts have been made to accommodate current developments in Recommendation M.3400. In general in this Recommendation, OSF and NEF take manager and agent roles respectively. 4.1 Management service description This TMN management service deals with the mainte
18、nance aspect of the management of B-ISDN by the TMN in the functional areas of - fault management including alarm surveillance and testing; - performance management in terms of performance monitoring functions associated with the ATM layer; - configuration management needed to handle virtual connect
19、ions; and - security management. 4.2 Management goals Using the B-ISDN Telecommunications Managed Area (see SI), TMN users, including network operators and B-ISDN customers, can provide and maintain physicalllogical resources constructing B-ISDN efficiently. The objective of this managed area is to
20、supply B-ISDN customers with a high quality service through such provisioning and maintenance activities. The architecture, to which the B-ISDN Telecommunications Managed Area is applied, is shown in Figures 1M.3610 to 4M.3610 i. The architecture of Recommendation M.3610 supports TMN users of the B-
21、ISDN Telecommunications Managed Area and allows: I) a network operator to manage hisher own B-ISDN network; 2) MSP-OSF (see Recommendation M.3610 i) to request OAM-OSF for managing services; and 3) TMNs of multiple interconnected B-ISDNs to exchange management information for the purpose of manageme
22、nt of customer end-to-end connections. This TMN Management Service addresses the maintenance aspects of B.ISDN management. 4.3 Management context description 4.3.1 Roles The roles described here include maintenance (including testing, performance monitoring and alarm surveillance) and some aspects o
23、f service provisioning. Network provider uses the service described below to support B-ISDN maintenance and some aspects of B-ISDN provisioning. 2 Recommendation M.3207.1 (0996) 4.3.2 Resources The resources to be managed are logical and physical resources constructing B-ISDN. These resources are id
24、entified in Recommendation 1.31 1 “B-ISDN general network aspects” 2. They include virtual pathskhannels as well as VPNC cross-connectslswitches, etc. The resources are abstracted as architectural components, which are defined in clause 3/G.803 3. The B-ISDN architectural components are described as
25、 follows: - The set of the access points for virtual channels constructs virtual channel layer network. - The set of the access points for virtual paths constructs virtual path layer network. - The set of the access points for transmission paths constructs transmission paths layer network. - Trails
26、are provided between the access points that are connected by a virtual channel, virtual path, or transmission path in the associated layer network. - A trail supported by a virtual channel (virtual channel trail) is formed by trail termination functions, a virtual channel network connection and its
27、TCPs (Termination Connection Points) in the virtual channel layer network. The virtual channel trail termination function is placed between the access point of the trail and the TCP of the network connection. The trail termination source function inserts and the trail termination sink function drops
28、 the end-to-end F5 OAh4 flow (see Recommendation 1.610 6) to obtain information related to the integrity of virtual channel information transfer. - A trail supported by a virtual path (virtual path trail) is formed by trail termination functions, a virtual path network connection and its TCPs in the
29、 virtual path layer network. The virtual path trail termination function is placed between the access point of the trail and the TCP of the network connection. The trail termination source function inserts and the trail termination sink function drops the end-to-end F4 OAM flow (see Recommendation 1
30、.610 6) to obtain information related to the integrity of virtual path information transfer. - A trail supported by a transmission path (transmission path trail) is formed by trail termination functions, a transmission path network connection and its TCPs in the transmission path layer network. The
31、transmission path trail temination function is placed between the access point of the trail and the TCP of the network connection. The trail termination source function inserts and the trail termination sink drops the F3 OAM (see Recommendation 1.610 6) flow to obtain information related to the inte
32、grity of transmission path information transfer. - A virtual channel network connection consists of the concatenation of virtual channel subnetwork connections and virtual channel links. Typically, a virtual channel subnetwork connection is a cross- connection. - A virtual path network connection co
33、nsists of the concatenation of virtual path subnetwork connections and virtual path links. Typically, a virtual path subnetwork connection is a cross-connection, - A transmission path consists of the concatenation of virtual path subnetwork connections and transmission path links. - The virtual chan
34、nel layer network and the virtual path layer network form the clientserver association: the virtual channel layer network is the client while the virtual path layer network is the server. Thus, a virtual channel link is provided by adaptation functions and a virtual path trail. - The adaptation func
35、tions between the virtual channel layer network and the virtual path network include multiplexing, demultiplexing, Usage Parameter Control (UPC) and capacity management. - The virtual path layer network and the transmission path layer network form the clientserver association: the virtual path layer
36、 network is the client while the transmission path layer network is the server. Thus, a virtual path link is provided by adaptation functions and a transmission path trail. - The adaptation functions between the virtual path layer network and the transmission path network include multiplexing, demul
37、tiplexing, cell delineation, Usage Parameter Control (VPC), and capacity management. Recommendation M.3207.1 (05/96) 3 STD-ITU-T RECMN M-3207.1-ENGL L77b 48b259L Ob2L7b0 743 Figure 1 illustrates these resources. VC-AP vc-AP VC Trail F5 OAM Flow VC Trail Termination VC Trail Termination VC Network Co
38、nnection . . . . . VC-TCP $ vc Link p+ VC Link f VC-TCP vc to VP vc to VP vc to VP Subnetwork vc to VP Adaptation Connection Adaptation Adaptation Adaptation . . TP-TCP TP Network Connection TP-TCP TP-TCP VC Virtual Channel VP Virtualpath TP Transmission Path AP Access Point CP Connection Point TCP
39、Termination Connection Point TO405750-95/dO 1 Access Point Connection PoinVfermination Connection Point Adaptation Termination FIGURE lh.3207.1 B-ISDN resources to be managed 4 Recommendation M.3207.1 (05/96) STD*ITU-T RECMN M*3207*L-ENGL 177b 4Bb257L Ob217bL bBT = 4.3.3 TMN management functions 4.3
40、.3.1 4.3.3.1.1 Alarm surveillance All management function sets in 3.1M.3400 “Alarm surveillance” 4 may be applied to this failure information: TMN management function sets found in Recommendation M.3400 4 1) VPC - AIS/RDI including alarm location from the location identification fields in OAM cells
41、and continuity check failure is reported from NEF to OSF. See Recommendation M.1400 5 on how the location identification field is determined. The report has to include the identification of the virtual pathkhannel trail termination function that detects AIS/RDI including alarm location identificatio
42、n fields in OAM cell and continuity check failure. When this optional location information is not available the report will so indicate. VCC - AIS/RDI including optional alarm location may be reported from NEF to OSF. 2) 3) NEF reports failure of restoration taken for a particular virtual pawchannel
43、 connection. 4.3.3.1.2 Testing The following are performed using the testing function sets in 3.4M.3400 “Testing” 4: 1) OSF requests NE to execute ATM non-intrusive loopback test. The test request has to include: - - loopback location (see Recommendation M. 1400) or indication for end-to-end measure
44、ment; and the identification of the trail termination function or the connection point that inserts and analyses the loopback OAM cell. 2) NEF reports the results of non-intrusive loopback tests. The report has to include the results as well as the identification of the trail termination functions o
45、r the connection points of the subnetwork connection that perform the test. 3) OSF requests NEF to insert or drop test cells for ATM performance testing in the in-service, out-of- service, or drop-insert measurement mode. The request has to include the identification of the insertion or drop point f
46、or test signal. Such a point corresponds to a trail termination function or a connection point of the subnetwork connection of the virtual pathkhannel to be tested. 4) OSF requests NEF to execute ATM performance testing, and NEF reports the results of ATM performance testing. 4.3.3.1.3 Fault correct
47、ion The following are performed using the fault correction function sets in 3.3M.3400 “Fault correction” 4: 1) NEF reports the result of change over function on a particular virtual patldchannel connection; 2) OSF requests NEF to send back information or records associated with change over function.
48、 4.3.3.1.4 Performance management control The following are performed using the performance management control function sets in 2.1M.3400 Performance Monitoring (PM)” 4: 1) NEF reports the status of performance monitoring on a particular virtual patldchannel connection or a particular segment of a v
49、irtual patldchannel connection. The report has to include the performance parameter values as well as the identification of the trail termination functions or the connection points of the subnetwork connection that perform monitoring. The monitored performance parameters are identified in Recommendation 1.610 6. Recommendation M.3207.1 (05/96) 5 2) OSF sets/clears control parameters of performance monitoring including a monitoring block size, threshold for the reporting of performance degradation, etc. The request has to include the
