Network Design & Planning Network Design & Planning

Anil ShirsatAnil Shirsatanilshirsat@yahoo.com

90221566889022156688

SyllabusSyllabus

1)1) Definition of terms Definition of terms 2)2) Making the business case for the Making the business case for the

Network Network 3)3) Network Design model Network Design model 4)4) Planning and Design of GSM/CDMA Planning and Design of GSM/CDMA

Networks Networks 5)5) Planning and Design of WiMAX Planning and Design of WiMAX

Networks Networks

SyllabusSyllabus

6)6) Planning and Design of Optical Fiber Planning and Design of Optical Fiber Based SDH / DWDM Networks Based SDH / DWDM Networks

7)7) Planning and Design of Wireless Planning and Design of Wireless LAN Networks LAN Networks

8)8) Planning and Design of Wired LAN Planning and Design of Wired LAN Networks Networks

9)9) IP Network Design IP Network Design

SyllabusSyllabus

10)10)IP Routing and DesignIP Routing and Design

11)11)Designing for the WAN Designing for the WAN

12)12)Designing Secure Converged Networks Designing Secure Converged Networks

13)13)Network Performance & Optimization Network Performance & Optimization

Different types of Telcom Different types of Telcom services.services.

1.Data service2.Voice3.Microwave links4.Iplc

Introduction to terms.Introduction to terms.

• PoP.PoP.• NLDNLD• ILDILD• SLASLA• ADM.ADM.• Modular.Modular.• Latency.Latency.

• RTD.RTD.• Mux.Mux.• Ethernet.Ethernet.• Half/Full Circuit.Half/Full Circuit.• Point to Point.Point to Point.• E1/T1/DS3/VC4/STM-E1/T1/DS3/VC4/STM-

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1.1. Definition of the termsDefinition of the terms

• Network planning and design Network planning and design is an is an iterative process, encompassing iterative process, encompassing topological design, network-synthesis, topological design, network-synthesis, and network-realization, and is aimed at and network-realization, and is aimed at ensuring that a new network or service ensuring that a new network or service meets the needs of the subscriber and meets the needs of the subscriber and operator. The process can be tailored operator. The process can be tailored according to each new network or according to each new network or serviceservice

Definition of the termsDefinition of the terms

•Capacity planning is the science and art of estimating the space, hardware, software and connection infrastructure resources that will be needed over some future period of time. A typical capacity concern of many enterprises is whether resources will be in place to handle an increasing number of requests as the number of users or interactions increase.

Three Steps for Capacity Planning

1) Determine Service Level Requirements

2) Analyze Current Capacity3) Planning for the future

Creating a Profit-Driven Creating a Profit-Driven NetworkNetwork

• Minimize operational, systems and Minimize operational, systems and support expenditure:support expenditure:

• Maximise network revenue potential: Maximise network revenue potential: • Minimise network operational and Minimise network operational and

capital expenditure:capital expenditure:• Grow revenue from new services:Grow revenue from new services:

Minimise Operational, Systems Minimise Operational, Systems and Support Expenditureand Support Expenditure

• align goals and objectives across align goals and objectives across teamsteams;;

• provide a common information provide a common information platformplatform;;

• ensure all processes are co-ordinated ensure all processes are co-ordinated and streamlined and have the and streamlined and have the appropriate support systemsappropriate support systems..

Maximise Network Revenue Maximise Network Revenue PotentialPotential• understand the network topology;understand the network topology;• track component inventory and location;track component inventory and location;• understand the connectivity understand the connectivity

relationships of network elements;relationships of network elements;• define and frequently monitor network define and frequently monitor network

utilisation;utilisation;• optimise network element usage based optimise network element usage based

on customer traffic demands.on customer traffic demands.

Minimise network operational Minimise network operational and capital expenditure: and capital expenditure: • calculate where and when new calculate where and when new

equipment will be necessary;equipment will be necessary;• optimise the architecture and network optimise the architecture and network

design to provide services to the largest design to provide services to the largest number of customers at minimum cost;number of customers at minimum cost;

• understand the understand the advantages/disadvantages of new advantages/disadvantages of new network architectures and network architectures and methodologies.methodologies.

Minimise network operational and Minimise network operational and capital expenditure: capital expenditure:

Short-Term PlanningShort-Term Planning

• NMS software up gradationNMS software up gradation• New hardware additions that will be New hardware additions that will be

installed in the network installed in the network • Routing customer circuits in order-Routing customer circuits in order-

book/short-term forecasts — this can book/short-term forecasts — this can be achieved in two waysbe achieved in two ways::– the first facility is designed to quickly route a the first facility is designed to quickly route a

handful of circuits onlyhandful of circuits only– second option which is to create a traffic second option which is to create a traffic

matrix (in a simple text file) specifying various matrix (in a simple text file) specifying various circuit details that can be routed in bulk across circuit details that can be routed in bulk across the networkthe network;;

Minimise network operational Minimise network operational and capital expenditure: and capital expenditure:

Short-Term PlanningShort-Term Planning• highlight any additional card build to highlight any additional card build to

satisfy short-term forecast, as in satisfy short-term forecast, as in many cases the forecast traffic would many cases the forecast traffic would exceed the capabilities of the current exceed the capabilities of the current network, hence necessitating new network, hence necessitating new network buildnetwork build

Minimise network operational and Minimise network operational and capital expenditure: capital expenditure:

Medium-Term PlanningMedium-Term Planning

•Automatically add additional build Automatically add additional build to meet requirements, e.g. to meet requirements, e.g. tributary cardstributary cards;;

•at major build points, interrupt at major build points, interrupt routing process to add appropriate routing process to add appropriate network infrastructure (e.g. ADMs network infrastructure (e.g. ADMs and ring interconnectionsand ring interconnections); );

Minimise network operational and Minimise network operational and capital expenditure: capital expenditure:

Long-Term PlanningLong-Term Planning

•At major build points, interrupt At major build points, interrupt routing process to add routing process to add appropriate network appropriate network infrastructure, e.g. new rings, infrastructure, e.g. new rings, stacked rings, spurs, meshesstacked rings, spurs, meshes;;

Minimise network operational Minimise network operational and capital expenditure: and capital expenditure:

Long-Term PlanningLong-Term Planning•simulate new products on simulate new products on

manufacturer's road map to assess manufacturer's road map to assess impact on networkimpact on network::– replacing current equipmentreplacing current equipment;;– redesigning current networkredesigning current network;;– enhanced stack design based on actual enhanced stack design based on actual

traffic analysis and/or improved traffic analysis and/or improved equipment functionalityequipment functionality;;

– network expansionnetwork expansion..

Grow revenue from new Grow revenue from new services:services:

• Optimise network architectures to Optimise network architectures to minimise delay and maximise minimise delay and maximise reliabilityreliability

• pursue new technologies that enable pursue new technologies that enable new and improved services.new and improved services.

Customer IncentivesCustomer Incentives

• Availability and Latency Availability and Latency • Planned Works Notification Planned Works Notification • New Technology Support New Technology Support

2.2. Making the business case Making the business case for the Network :for the Network :

• Design Methodology: top-down Design Methodology: top-down design approachdesign approach

• Evaluation factorsEvaluation factors-cost factors, revenue and ROI-cost factors, revenue and ROI

SUCCESS FACTORS FOR THE SUCCESS FACTORS FOR THE GROWTH OF SERVICESGROWTH OF SERVICES• Create the market first, using the existing Create the market first, using the existing

systems.systems.• Market the new services in a user-friendly Market the new services in a user-friendly

language, based on customer benefit, not with language, based on customer benefit, not with expressions like GPRS etc.expressions like GPRS etc.

• Create standards.Create standards.• Launch public safety services for elderly Launch public safety services for elderly

people and for the medical service.people and for the medical service.• Minimize investment cost (per user) for the Minimize investment cost (per user) for the

new equipment.new equipment.

Design MethodologyDesign Methodology

• A A bottom-upbottom-up approach is the piecing approach is the piecing together of systems to give rise to together of systems to give rise to grander systems, thus making the original grander systems, thus making the original systems sub-systems of the emergent systems sub-systems of the emergent system. system.

• A A top-downtop-down approach (is also known as approach (is also known as step-wise design) is essentially the step-wise design) is essentially the breaking down of a system to gain insight breaking down of a system to gain insight into its compositional sub-systems. into its compositional sub-systems.

Cost factorsCost factors

• Infrastructure costsInfrastructure costs• Equipment's cost.Equipment's cost.• Interconnection charges.Interconnection charges.• Operational cost is more in rural Operational cost is more in rural

areas than urban areas.areas than urban areas.

Return on investment (ROI)Return on investment (ROI)

• What will a new network or service What will a new network or service cost throughout its lifetime, in both cost throughout its lifetime, in both capital and running costs?capital and running costs?

• What profile of investment will it What profile of investment will it require?require?

• When will it pay back?When will it pay back?• How profitable will it be?How profitable will it be?

Sources of revenue to deliver ROI

Two options• Subscriber revenue• Non-subscriber revenue

Subscriber revenue

Voice & Data revenue directly from subscribers

• Data bits (charges to user based on bits of downloads)

• Services (charges to user for data services – SMS, remote data storage/sync/backup, etc)

• Apps purchases (charges to user for mobile app purchases)

• Products purchases (charges to user for product purchases, such as ring tones, songs, etc.)

Non-subscriber revenue

•Revenue share for third party services•Revenue share from mobile apps

purchases•Revenue share from product

purchases•Revenue from advertising to

subscribers by third parties

3. 3. Network ModelNetwork Model

The essential inputs to the design The essential inputs to the design process are:process are:

•customer traffic requirements;•sites for nodes;•equipment (link and node) costs;•available duct network;• reliability requirements.

DesignDesign Types

• MeshMesh NetworkNetwork• RingRing

Mesh network

• Shared restoration mesh networks minimise the link cost by achieving direct routings for working paths and the highest possible degree of sharing for protection paths.

Ring NetworkRing Network

• Rings are the most common Rings are the most common architecture found in metropolitan architecture found in metropolitan areas and span a large distances. areas and span a large distances. The fiber ring might contain as few The fiber ring might contain as few as four wavelength channels, and as four wavelength channels, and typically fewer nodes than channels. typically fewer nodes than channels. Bit rate is in the range of 622 Mbps Bit rate is in the range of 622 Mbps to 10 Gbps per channel.to 10 Gbps per channel.

Single & double ring network

Design Review of network design model

•Design review is a tool that can be used to help companies improve the quality of the services, reduce the time to market for a service and reduce the development and scrap/rework costs of the project. It is a general activity that can be applied readily to any industry, and can be used to improve the quality of services as well as products.

Quality of Service

•Quality of Service (QoS) is the collective measure of the level of service to a subscriber

•A best-effort network or service does not support quality of service.

Performance criteria for QoS

• Latency/Latency/Packet delay (or delay in general)

• Jitter (delay variations)•Packet loss•Bandwidth or throughput• Errors Errors or bit error rate

Documenting Your Network Design

• In engineering, technical documentation refers to any type of documentation that describes handling, functionality and architecture of a technical product or a product under development or use.

• Technical documentation aims at providing enough information for a user to understand inner and outer dependencies of the product at hand.

Contents of a Network Design Document

• Executive summary• Project goal• Project scope• Design requirements• Current state of the network• New logical and physical design• Results of network design testing• Implementation plan• Project budget

Possible Appendixes

• Detailed topology maps• Device configurations• Addressing and naming details• Network design testing results• Contact information• Pricing and payment options• More information about the company that is

presenting the design– Annual reports, product catalogs, press releases

• Legal contractual terms and conditions