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## NETWORK PLANNING AND TOPOLOGY

May 27 • Engineering Notes, Notes • 1410 Views • 3 Comments on NETWORK PLANNING AND TOPOLOGY

NETWORK PLANNING

INTRODUCTION:

Network Planning and Design is the most critical step in any network deployment and it provides the essential foundation for future network build. It is an iterative process encompassing network realization topological design and network synthesis.

The process is performed before the start of any new telecommunication network or service.

NETWORK PLANNING INCLUDES FOLLOWING:-

• Long-term and medium-term network planning
• Short-term network planning
• IT asset sourcing
• Operation and maintenance

The main steps of Network Planning and Design are:

• Topological design
• Network Synthesis
• Network realization

TOPOLOGICAL DESIGN

Where to place the component and how to connect them is determined by Topological Design. Cost of switching and the cost of transmission is also determined by this stage.

NETWORK SYNTHESIS

This stage is also known as “NONLINEAR OPTIMISATION”. Required GOS(grade of service), size of the component used is determined by this stage. And this information is use to calculate  routing  plan and size of component.

NETWORK REALIZATION

This step is use to determine the information relating to reliability, cost and demand. which  is use to calculate an actual physical circuit plan. It is also known as “Multicommodity Flow Optimisation”.

WIRELESS NETWORK TOPOLOGY

Network Topology plays an important role in any network setup and without network topology network can not be established .

There are two topology in wireless network:

• Infrastructure Topology

INFRASTRUCTURE TOPOLOGY

There is a wireless central device in a INFRASTRUCTURE topology technically known as Wireless Access  Point (WAP). It is a spoke and hub topology. With all other computers connecting to it , the WAP acts as the hub in the network.

Nowadays WAP support IEEE 802.11 b/g/n wireless standard that provide data transfer speed of up to 11/54/100+ Mbps respectively at the frequency of 2.4 GHz. So, wireless nodes enhanced transfer speed in this topology and exploit the wireless devices at their full.

Many  to many or multipoint to multipoint topology is Ad hoc wireless network topology. There is no central access point in the Ad hoc network topology so, it can be implemented without WAPs and all wireless devices are directly connected to all other wireless devices. These   Topologies are essentially mesh networks.

As compare to Infrastructure Topology Ad hoc Topology are easier to configure and cheaper to implement. The transfer speed of Ad hoc topology do not exceed  11 Mbps. This  topology allows administrator to configure Wired Equivalent privacy or WEP security

CELLULAR TOPOLOGY

Cellular Topology does not require any cable connection. It is applicable only in case of wireless media where geographical area is divided into cells or regions.

Each cell represents a   portion of the total network area. Devices which are present in a cell communicate through a central hub. And these hubs in different cells are interconnected . they route data across the network and provide a complete network infrastructure. The data is transmitted in the cellular digital packet data (CDPD) format.

1. What are the main steps in network planning and design??

There are three main steps in network planning design and these are the steps

• Topological design
• Network synthesis
• Network realization                                                                                                                            2. What is the between infrastructure and Ad hoc wireless network topologies??

• Infrastructure Topology has central access point WAP where as  in Ad hoc Topology there is no central access point.
•  Infrastructure topology having the higher network speed and stronger security as compare to Ad hoc Topology
• Infrastructure topology is typically used for permanent network where as Ad hoc Topology is used for temporary network.                                                                                                                          3. What are the advantages of cellular topology??

• It is so flexible
• It is easy to install
• It does not need any reconfiguration                                                                                                                                                                                                                 4.  What are the disadvantages of cellular topology??