Prof. Shervin Shirmohammadi
CEG 4395
18-1
Lecture 18:
Telecommunications Management
Network (TMN)
Prof. Shervin Shirmohammadi
SITE, University of Ottawa
Prof. Shervin Shirmohammadi
CEG 4395
18-2
TMN
• Necessity for interoperability
• Need for management of more than just the
network components
• Networks / subnetworks
need to be managed
• Services
- internal and external need
management
Prof. Shervin Shirmohammadi
CEG 4395
18-3
Operations System
• 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
Telecommunication NetworkFigure 11.1 Operations System for Network Transmission
Public Switch Transmission Test System Transmission Test System Public Switch Trunk Test System Voice Voice Nodes Transmission Links
Prof. Shervin Shirmohammadi
CEG 4395
18-4
Figure 11.2 Operations System for Traffic Measurement Data / Telecommunication Network Router / Switch Traffic Counter Traffic Counter Router / Switch Traffic Measurement System Transmission Links Nodes
OS: Telephone Switch Traffic
• Traffic monitored at switch
• Call blocking statistics obtained
• Traffic and call-blocking statistics provide data for planning
• Importance of Operations, administration, maintenance, and
Prof. Shervin Shirmohammadi
CEG 4395
18-5
Telecommunication Network
Figure 11.3 TMN Relationship to Data and Telecommunication Network
Voice Voice
Data Communication Network Operations System NMS Operations System Operations System Workstation Telecommunications Management Network Switching System Transmission System Switching System Switching System Transmission System
TMN in Data and Telecom Networks
Prof. Shervin Shirmohammadi
CEG 4395
18-6
Customers Services provided by Telecommunications Provider Network Operations Systems System Operators OS OS Customers Services provided by Telecommunications Provider Network Operations Systems OS OS
Figure 11.4 TMN Conceptual Model X Q3 F Workstation System Operators Workstation F Service provider A Service provider B
Q3 Q3
Q3
Prof. Shervin Shirmohammadi
CEG 4395
18-7
TMN Architecture
Physical
Architecture
Informational
Architecture
Functional
Architecture
Figure 11.6 TMN Architecture
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
Prof. Shervin Shirmohammadi
CEG 4395
18-8
Functional Architecture
•
OSF
: Functions performed by
Operations 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
: Operations 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
OSF MF WSF QAF NEF q3 f qx qx OSF x q3 OSF q3 TMN B TMN A
Figure 11.7 TMN Functional Architecture
Prof. Shervin Shirmohammadi
CEG 4395
18-9
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
• q3
: 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
Figure 11.8 TMN Reference Point
Function Block
Function Block
Reference Point
Prof. Shervin Shirmohammadi
CEG 4395
18-10
Operations System
(OS)
Data Communications Network (DCN)
Q Adapter (QA)
Data Communications Network (DCN)
Prof. Shervin Shirmohammadi
CEG 4395
18-11
Manager Agent
Operations / Requests Responses Notifications / Traps
Figure 11.10 TMN Information Architecture
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 Management (FTAM)
• Internet File Transfer Protocol (FTP)
Prof. Shervin Shirmohammadi
CEG 4395
18-12
Business Management
Service Management
Network Management
Element Management
Managed Network Element q3
q3
q3
q3
Figure 11.11 TMN Service Architecture
Prof. Shervin Shirmohammadi
CEG 4395
18-13
Figure 11.13 TMN Services and Functions
ACSE ROSE TMN Functional Components TMN Management Services Business Management Service Management Network Management Element Management
System Management Functional Areas Configuration Management Fault Management Performance Management Security Management Accounting Management TMN Function Blocks
System Management Functions
CMISE QAF NEF NM Manager Object Management Alarm Management M-GET / GET-REQUEST M-SET / SET-REQUEST M-CREATE
Communication Transport Service (OSI Presentation Layer)
OSF WSF MF
DCF
Presentation Function
Remote Procedure Call
TMN Services & Functions
Prof. Shervin Shirmohammadi
CEG 4395
18-14
Example (NMF)
Business Management Customer Service Management Service Management Service Mgmt Tarif/Charging Service Mgmt Provisioning Service Mgmt Other Network Management Net Mgmt Routing Admin Net Mgmt Traffic Admin Net Mgmt Restoration Element Management Net Element Cust Admin Net Element Switch Mgmt Net Element Trans Eqpt Mgmt Service Details Performance and Billing Data Service Configuration Service-impacting Events EquipmentConfiguration Q3 EquipmentAlarms Q3 Q3 TMN Logical Layered Architecture Physical Realization of TMN Architecture
