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8/8/2019 1 2 Telecom Network Overview
http://slidepdf.com/reader/full/1-2-telecom-network-overview 1/39
© BHARAT SANCHAR NIGAM L IMITED
Telecommunication
Network ManagementOverview
8/8/2019 1 2 Telecom Network Overview
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© BHARAT SANCHAR NIGAM L IMITED
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.
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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.
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Benefits of Telecom
New industries are possible like BPO.
New facilities like
tele-medicine,
tele-education,
e-governance,
e-commerce
Leads to economic growth.
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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.
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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.
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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
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Trends in Telecommunications (continued)
Technology (continued)
Fiber-optic lines & cellular, CDMA, satellite& other wireless technologies
Faster transmission speeds
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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,
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Trends in Te lecommunica t ions(cont inued)
Improve collaboration,
Share resources,
Lock in customers & suppliers,Develop new products & services
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Communication – Fixed Lines
Telephone Exchanges
Subscriber
Line
Inter-Exchange
Junction
Subscriber
Line
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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
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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
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The medium
Copper
Coaxial
Microwave
OFC –Backbone & access
Satell i te
DWDM systems
PON
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Telecommunications NetworkAlternatives
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A Telecommunications NetworkModel
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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
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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
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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
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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
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Telecommunications Software
Provides a variety of communicationssupport services including connecting &
disconnecting communications links &establishing communications parameterssuch as transmission speed, mode, anddirection.
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Telecommunications Software(continued)
Netw ork Management P a r t
Traffic management
Security
Network monitoringCapacity planning
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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,
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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
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What is the TelecommunicationsManagement Network (TMN)
This is achieved through an agreed
architecture with standardised
protocols and interfaces
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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
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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.
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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
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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
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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.
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CONFIGURATION MANAGEMENT
Support Semi-Permanent Connections e.g.
Permanent virtual circuits (pvcs).
Relationship with planning, performance andfault management.
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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.
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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.
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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.
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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.
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Telecom Services
Landline Services.
Mobile Services.
Internet Services.
Intelligent ServicesData Communication Services.
Satellite Services
Other Services
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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