Lecture 18: Telecommunications Management Network (TMN)

Transcription

1 Lecture 18: Telecommunications (TMN) Prof. Shervin Shirmohammadi SITE, University of Ottawa Prof. Shervin Shirmohammadi CEG TMN Necessity for interoperability Need for management of more than just the network components s / subnetworks need to be managed s - internal and external need management Business management needs to be addressed TMN joint effort by ITU-T and ISO Prof. Shervin Shirmohammadi CEG

2 Refers to operations support system E.g., Trunk is a logical connection between two switching nodes Periodic measurement of loss and S/N of all trunks Failing threshold set for QoS; failing trunks removed out of service before the customer complains Test Trunk Test Telecommunication Nodes Test Public Switch Links Public Switch Figure 11.1 for Prof. Shervin Shirmohammadi CEG OS: Telephone Switch Traffic Traffic monitored at switch Call blocking statistics obtained Traffic and call-blocking statistics provide data for planning Importance of, administration, maintenance, and provisioning Traffic Measurement Traffic Counter Data / Telecommunication Nodes Traffic Counter Router / Switch Links Router / Switch Prof. Shervin Shirmohammadi CEG Figure 11.2 for Traffic Measurement 2

3 TMN in Data and Telecom s Telecommunications NMS Data Communication Switching Switching Switching Telecommunication Figure 11.3 TMN Relationship to Data and Telecommunication Prof. Shervin Shirmohammadi CEG TMN Conceptual Model provider A provider B Customers Customers s provided by Telecommunications Provider s provided by Telecommunications Provider s OS OS F X s OS OS F Operators Operators Prof. Shervin Shirmohammadi CEG Figure 11.4 TMN Conceptual Model 3

4 TMN Architecture Functional architecture: Functional modules or blocks Reference points between modules Physical architecture: Physical blocks Physical interfaces between the blocks Informational architecture: Information exchange between entities Object oriented TMN Architecture Functional Architecture Physical Architecture Informational Architecture Figure 11.6 TMN Architecture Prof. Shervin Shirmohammadi CEG Functional Architecture OSF: Functions performed by systems E.g., NMS, testing, accounting, trouble tracking NEF: Functions needed to support network elements; network elements themselves are not part of TMN: e.g., NM agent, MIB, collision rate MF: on the information between network elements; e.g. filtering, protocol conversion MF can be shared between multiple OSSs; e.g. RMON WSF: Human-TMN activities interface; e.g., GUI QAF: Adapter function to accommodate non-tmn entities; e.g. proxy server, SNMP-to-CMIP TMN A Prof. Shervin Shirmohammadi CEG NEF TMN B qx OSF x OSF MF qx QAF f OSF WSF Figure 11.7 TMN Functional Architecture MF Mediation Function NEF Function OSF s Function QAF Q Adapter Function WSF Function 4

5 TMN Reference Point Function blocks connected by conceptual interfaces, called reference point Designated by lower case letters (upper case letter for physical interfaces) x: Interface between operations systems that belong to different domains; e.g., interface between two NMSs belonging to two different domains : Interface between two OSFs in the same domain qx: Interface between mediation function such as RMON and agent in the network element f: Interface to the workstation Function Block Reference Point Function Block Figure 11.8 TMN Reference Point Prof. Shervin Shirmohammadi CEG Physical Architecture (OS) TMN X (OS) X/F/ Data Communications (DCN) Mediation Device (MD) F/ F Qx Data Communications (DCN) Qx Qx Q Adapter (QA) (NE) Q Adapter (QA) (NE) Prof. Shervin Shirmohammadi CEG

6 Information Architecture Initially adopted the OSI architecture: CMIP/CMIS Later, SNMP also supported two types of communication services: Interactive ROSE used by CMISE RPC in the Internet world File-oriented OSI File Transfer Access (FTAM) Internet File Transfer Protocol (FTP) / Requests Manager Responses Agent Notifications / Traps Figure TMN Information Architecture Prof. Shervin Shirmohammadi CEG Architecture Business Managed Figure TMN Architecture Prof. Shervin Shirmohammadi CEG

7 TMN s & Functions TMN s Business Functional Areas Configuration Fault Performance Security Accounting DCF TMN Function Blocks OSF WSF NEF MF QAF Functions Object Alarm TMN Functional Components NM Presentation Manager Function M-GET / GET-REQUEST M-SET / SET-REQUEST CMISE M-CREATE Remote Procedure Call ACSE ROSE Communication Transport (OSI Presentation Layer) Figure TMN s and Functions Prof. Shervin Shirmohammadi CEG TMN Logical Layered Architecture Example (NMF) Physical Realization of TMN Architecture Business Customer Ref. Point Details Performance and Billing Data Mgmt Tarif/Charging Mgmt Provisioning Mgmt Other Ref. Point Configuration impacting Events Net Mgmt Routing Admin Net Mgmt Traffic Admin Net Mgmt Restoration Ref. Point Equipment Configuration Equipment Alarms Net Cust Admin Net Switch Mgmt Net Trans Eqpt Mgmt Prof. Shervin Shirmohammadi Figure TMN CEG Realization 4395 Example (NMF)