Network Management

Fourteen Meeting

Principles Of Network Management

Telecommunications management network (TMN) provides a framework for telecommunications

management. Example:

Remote operation of equipment, Collection of information which helps faults to be dealt with

proactively before a complete failure (e.g., Tsunami) Easier interworking of equipment from different

manufacturers, Abstract view of information (hide the physical detail)

The Managing and Managed Network

Telecommunications Management Network

Managing The Multiplexer Telecommunication Network

Agents: Managed Objects

The Agent in: Has control of dropping

VC12 from ADMs Has to handle:

The timing extraction, Pointer decoding, framing that are

associated with multiplexing

framing of the coding functions associated with receiving and transmitting to line.

Managing SDH Networks

Self-healing ring

Ring management Sub-network is used to connect a group

of local towns. Jeddah provides access out of the ring Each node has ADM Planning process.

deciding where, when and how a ring should be installed

Configuration information Plug-in circuit boards Flexibility is important Keep precise records of how each ADM

is configured. Look at all of the configuration tables Determine where spare capacity exists in

the network. Set up new paths in the network

Send switching instructions to initiate add/drop or crossconnect actions.

Jeddah

Rabigh

Madinah

Makkah

Yanbu

Which One is More Feasible

Jeddah

Rabigh

Madinah

Makkah

Yanbu

Jeddah

Rabigh

Madinah

Makkah

Yanbu

Jeddah

Rabigh

Makkah

Madinah

Yanbu

Central Record Distributed Record

Embedded and Dedicated

Jeddah

Rabigh

Madinah

Makkah

Yanbu

Network

Manager

Embedded Data Channel

Jeddah

Rabigh

Madinah

Makkah

Yanbu

Dedicated Data Connections

Network

Manager

Management networks In Telecommunication

Management Network (TMN) Item of telecommunication

equipment is an element Elements that are managed by

the TMN are called network elements (NE)

The aim of the TMN is to Provide a definition of how

management information is organized.

The functional architecture Contains a set of functional

blocks, It separates out the

management functions

Functional Blocks Network Element

Function (NEF) is implemented in one of

the add/drop multiplexers in the ring

Operations System Function (OSF) resides in software in a

computer Workstation Function

(WSF) provides a graphical user

interface (GUI) to the operator

WSF

NEF

OSF

NEF

Jeddah

Rabigh

Madinah

Makkah

Yanbu

Network element function (NEF) Provides a home within the

telecommunication network for the agent that will manage the network element.

This block presents activities – Switching, Alarm notification and performance –

Communicates operations from the manager to the network element.

Provides the communication boundary between the management and telecommunication networks.

WSF

NEF

OSF

NEF

Workstation function (WSF)

Convert TMN information into a format that can be easily understood by the user –

In the opposite direction it will convert user input into a form usable by the TMN.

Sits across the TMN boundary

Usable by operators.

WSF

NEF

OSF

NEF

Q adaptor function (QAF) block Translate non-TMN systems into a

TMN format. Operations system function (OSF)

Processes the information collected through the other blocks.

Mediation function (MF) block Mediates data passing between an

operations system function and network element function

Mediation includes adaptation, filtering, and storage.

Reference points Define the boundary between

management function blocks and functions outside the TMN.

Other Blocks

WSF

NEF

OSF

QAF

MF

Physical architecture

The physical architecture of the TMN follows very closely the organization of the functional architecture and is shown below. Each of the reference points is replaced with an interface.

Management functions Management Domain

It is divided vertically into slices representing some of the defined management functions.

Vertical Separation Each manager is responsible for

all the activities that relate to its function

Planning manager Balances demand and resource. Forecasts of future demand Demands are entered via the

workstation function. Resource information can be

provided by the agent in a network element

NEF

Port1

Port4

Port3

b

Management functions: Request Flow

Service Request

ConfigurationManager

Translate

Op B

Op A = Establish Connection between port1 and port4

Op B = Drop b (VC12) from port 3

NE = Network Elements

Op A

WSF

OSF

Managers’ Role Planning manager’s

Balances demand and resource. Forecasts of future demand Demands are entered via the workstation function. job is to balance demand and resource. Forecasts of future demand

configuration manager Receive specific requests for service Translated the requests into operations Send the translated request to the network elements to initiate actions,

Performance manager Once in service, monitor network elements to detect alarms Monitor other performance indicators defined in the information model.

Accounting manager collects data on network use in order to apportion or assign the costs to different

customers. Bills customers based on many factors

time of day utilized bandwidth.

2Mbps

Management layers Network element layer

Process normal data Pass to the network management layer the

following: unprocessed time sensitive data to the processed normal data

Network management layer Manages more than one network element Is interested in actions affecting a network of

elements Initiate actions to interconnect a number of network

elements in order to provide a circuit between two points.

Service management layer’s Carries initiated action from previous layer Maintains quality of service and service contracts.

Business management layer Meeting the business goals Maximizing utilization of the traffic-carrying capacity

of the network, Meets performance targets Minimizes the costs of running the network

Management Services