1 2 Telecom Network Overview

8/8/2019 1 2 Telecom Network Overview

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© BHARAT SANCHAR NIGAM L IMITED

Telecommunication

Network ManagementOverview




What is Telecom ?

Telecommunication is the assistedtransmission of signals over a distance

for the purpose of communication.

It is the technology of transferring

information over a distance.




Information

1. Information can be of several type:

Audio – Telephone

Text - Telegraph , emai l, SMS

Pictures – Picture at tachments Video – Cl ipping over internet

Data – ATM to bank.

2. The same telecom technology/service cannotcommunicate all the types of information.




Benefits of Telecom

New industries are possible like BPO.

New facilities like

tele-medicine,

tele-education,

e-governance,

e-commerce

Leads to economic growth.




Telecom scenario

Growing subscriber base.

New services and technologies.

More focus on wireless & internet.

Government wants more developmentin rural areas.

Decreasing Prices.

Increasing demand for bandwidth.




Important Network elements inTelecom

Customer premises equipment.

Access Network

Transmission

Switching

Computerization


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Trends in Telecommunications

IndustryMore competitive

More options for the firm

Technology

Unrestricted connectivity

Easy access for end users

Open systems

Use common standards forhardware, software, applications, &networking.



Trends in Telecommunications(continued)

Technology (continued)

High degree of interoperability

Digital networks

Higher transmission speedsMoves larger amounts of information

Greater economy

Lower error ratesMultiple types of communications on

the same circuits



Trends in Telecommunications (continued)

Technology (continued)

Fiber-optic lines & cellular, CDMA, satellite& other wireless technologies

Faster transmission speeds



Trends in Te lecommunica t ions(cont inued)

Business applications

Dramatic increase in the number offeasible telecommunication

applications. This needs;cut costs,

reduce lead times,

shorten response times,support e-commerce,



Trends in Te lecommunica t ions(cont inued)

Improve collaboration,

Share resources,

Lock in customers & suppliers,Develop new products & services



Communication – Fixed Lines

Telephone Exchanges

Subscriber

Line

Inter-Exchange

Junction

Subscriber

Line




Communication - Mobile

T e l e p h o n eEx ch an ge

S u b s c r i b e rL i n e

I n t e r - E x c h a n g e

J u n c t i o n

M ob i l e Sw i t c h i ngC en t r e ( M S C )

BSC BTSMS




Um E

Abis A

Q C

B

N H

MS

BT S BSC

PSTNM SC

M SC/SSP VLR

HLRAUC

MC

D

MC

M

MSS

BSS

Ai

Mobile Architecture




The medium

Copper

Coaxial

Microwave

OFC –Backbone & access

Satell i te

DWDM systems

PON




Telecommunications NetworkAlternatives




A Telecommunications NetworkModel




A Telecommunications NetworkModel (continued)

Consists of five basic components

Terminals

Any input/output device that uses

telecommunication networks totransmit or receive data

Telecommunication processors

Support data transmission andreception between terminals andcomputers




A Telecommunications NetworkModel (continued)

Telecommunications channels

The medium over which data aretransmitted and received

Computers Interconnected by telecommunications

networks

Telecommunications control software

Control telecommunications activities& manage the functions oftelecommunications networks




Types of TelecommunicationsNetworks

Wide Area Networks (WAN)Cover a large geographic area.

Local Area Networks (LAN)Connect computers & other information

processing devices within a limitedphysical area.

Connected via ordinary telephonewiring, coaxial cable, or wireless radio &infrared systems




Types of TelecommunicationsNetworks (continued)

Virtual Private Networks

A secure network that uses the Internet as its

main backbone network, but rel ies on f ire

walls and other security features




Telecommunications Software

Provides a variety of communicationssupport services including connecting &

disconnecting communications links &establishing communications parameterssuch as transmission speed, mode, anddirection.




Telecommunications Software(continued)

Netw ork Management P a r t

Traffic management

Security

Network monitoringCapacity planning




The need for open management

Need to provide telecommunication servicesglobally in a cost-effective manner

Multi-vendor, mult i-provider environment

Management systems are required for operation,




The need for open management

Administration, maintenance and provisioning(oam&p)

Activi t ies - management appl ications need to

communicate openly within a domain and acrossdomains

Need for management frameworks and

standards




What is the TelecommunicationsManagement Network (TMN)

This is achieved through an agreed

architecture with standardised

protocols and interfaces




What is the TelecommunicationsManagement Network (TMN)

Its purpose is to support operators inmanaging:

Telecommunications networks and services

I t provides a framework for inter-operabil i ty,i .e. Interconnection of operations systems andtelecommunications equipment




TMN field of application

Synchronous transmission networks (SDH)

Broadband mult i-service networks (PON/ATM)

Public switched telephone networks

Intell igent networks

Mobile networks etc.




Management functional areas

Types of management activity have beencategorised into f ive generic funct ional areas:-

Fault management

Configuration management Accounting management Performance management Security management also known as

FCAPS




FAULT MANAGEMENT

Receive reports about malfunctions

(alarms). - Prioritise, condense, f i lter

Alarm correlation

Testing

Fault identification and diagnosis.

Maintenance dispatch - periodic testing /repair activities




CONFIGURATION MANAGEMENT

Maintain the configuration state of a networkand the relationships between components.

Identify status and location of equipment

(inventory).

Initialise, configure and shut down equipment.

Maintain view of both physical and logical

network topology.




CONFIGURATION MANAGEMENT

Support Semi-Permanent Connections e.g.

Permanent virtual circuits (pvcs).

Relationship with planning, performance andfault management.




ACCOUNTING MANAGEMENT

Collect service usage information (“usage

metering”).

Associate it with tariff ing schemes toproduce charging and bill ing information.

Monitor user access privileges.

Provide analysis of usage for sales, newtariffing policies, etc.




PERFORMANCE MANAGEMENT

Collect traffic information

Use it for capacity planning and provide trafficflow predictions (per hour, day, month).

Monitor the level of resource util isation andresponse times.

Identify bottlenecks and congestion, try to

Recover through soft re-configuration.Relationship with configuration management.

Monitor quality of service for services sold on

service level agreements.




SECURITY MANAGEMENT

Protect access to network, system, service andmanagement resources.

Authentication: validate legitimate users andapplications.

Confidentiality: encrypt confidentialinformation while in transit.

Integrity: prevent modification of informationwhile in transit.

Access control: provide different levels ofaccess to different users / applications.




Telecom Services

They are classified in three maincategories:

1 . Basic Services : Voice, FAX (both G-3& G4)

2 . Supplementary Services: It includesservices like Call Waiting/CallForwarding (conditional &Unconditional) ,CLIP, DTMF,CUG or

CENTREX,ABB Dialing etc.3 . Value Added Services : Internet, IN

Services, Multimedia content , LBS ,Fleet Tracking etc.




Telecom Services

Landline Services.

Mobile Services.

Internet Services.

Intelligent ServicesData Communication Services.

Satellite Services

Other Services




One network for everything

Today Tomorrow

Telephonenetwork

Mobile radionetwork

IP-Network

Multimedia Access - Advantages:• Easy to handle• Rreliable• Mobile

Internet

Transition to NGN: Third wave



1 2 Telecom Network Overview

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