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God object & topography - (BCA / B.Tech)

GOD Object & Topography in Hindi | God Object and Topography in a Wireless Network in Hindi:

In a wireless network, the God object and topography are two important concepts that govern the network simulation and routing process. The God object keeps an eye on the entire network status and the distance between nodes, while the topography determines the physical position of the nodes.
The combination of these two provides an accurate and effective model for network behavior, connectivity, and data transfer. By using these concepts in simulators like NS2, it becomes easy to simulate real-world wireless networks,
which provides significant help in network design and research.

In a wireless network, the God Object and Topography are two important concepts that are widely used in network simulation and modeling. Their purpose is to better understand and simulate the behavior of the network, connectivity, and communication between network nodes.
These concepts are specially used in simulators like NS2 (Network Simulator 2) to analyze the functionality of a wireless network.

In this article, we will understand in detail what God object and topography are, what their importance is in a wireless network, and how they work in a simulation.

Introduction of God Object in Hindi | Introduction to the God Object:

The God object is a special type of object that is used in network simulators like NS2 to centrally store all the information between nodes during a simulation. This object has complete information about all the nodes of the network and their activities, which is why it is called a "God" object, because it is aware of all the events in the network, even if the nodes themselves are unaware of that information.

Work of God Object in Hindi | Function of the God Object:

The main function of the God object is to track the information and status of various nodes within the network and to use this information during the simulation process. This object performs the following functions:

Calculating the distance between nodes: The God object has information about how much distance there is between two nodes, so that the correct route can be selected during packet transmission.
Information about signals and interference: This object has information about the signal strength and potential interference between nodes.
Help in routing decisions: In some routing protocols, such as AODV (Ad-Hoc On-Demand Distance Vector), the God object provides the necessary information for routing decisions.
Mobility and location tracking: The God object tracks the movement and location of nodes, so that the communication between nodes can be accurately simulated in real-time in the simulation.

How is the God object used?

In NS2, the creation and use of the God object is done as follows:

# Creation of the God object

set god_ [create-god 10]

Here, the create-god command creates a God object for 10 nodes. During the simulation, this object will have the information of all the nodes.

Importance of God Object in Hindi | Importance of the God Object

Complete Information: The God object has information about the entire network, which helps it to make routing and transmission decisions.
Accuracy: It accurately calculates the distance and position between nodes, so that errors in data communication can be reduced.
Making simulation easier: Because of the God object, it becomes easy to track the information of all the nodes in the simulation.

Introduction of Topography in Hindi | Introduction to Topography

What is Topography?

The literal meaning of topography is "landform" or the structure of an area. In networking, topography means the geographical position of the nodes of a network and their interconnection. In a wireless network, nodes are deployed in a specific area and their position and connectivity affect the performance of the network. Topography determines which nodes can communicate with each other and what the distance is between them.

Importance of Topography in Hindi | Importance of topography in a wireless network

Connectivity and Communication: Based on the topography, it is decided which nodes are in each other's radio range and whether communication can take place between them.
Network Performance: Topography has a profound impact on network performance, because the position of the nodes and the distance between them affect the signal quality and data transfer speed.
Impact on Routing Protocols: Topography also affects routing protocols, because the most suitable route is selected based on the distance between the nodes and their position.

Use of Topography in NS2 in Hindi | Use of topography in NS2:

In NS2, you can set the topography of the nodes of the network. This topography determines the position of the nodes during the simulation.

To set the topography, first you need to define the boundaries of the simulation. Example:

# Setting the space boundary for the simulation (an area of 500x500)

set topo [new Topography]

$topo load_flatgrid 500 500

In this code, an area (grid) of 500x500 has been created using load_flatgrid, in which the nodes will be placed. You can set the nodes at a specific location:

# Placing the nodes at a specific location

$node_(0) set X_ 100

$node_(0) set Y_ 200

$node_(0) set Z_ 0

Here, node 0 is placed at the (100, 200) location, and its height on the Z-axis is 0, because we are working in 2D space.

Impact of Topography in Hindi | Impact of Topography:

Signal Range: Signal strength and connectivity are affected based on the position of the nodes. If two nodes are very far apart, communication between them can fail.
Routing: Topography affects routing protocols, because the protocols have to select the most efficient path between the nodes.
Movement Pattern: If the network is mobile (like a mobile ad-hoc network), then the movement of the nodes is also controlled by the topography. In this situation, the distance and connectivity between the nodes change over time.

Relationship between God object and topography in Hindi | Mutual relationship between God object and topography:

In a wireless network simulation, the mutual relationship between the God object and topography is very important. Topography determines the physical position of the nodes in the network, while the God object has complete information about the positions of these nodes and the distance between them. During the simulation, the God object and topography together ensure that data communication happens correctly and that the correct routing is done according to the signal limits.

Example:

In a mobile network: When the nodes are moving, the God object tracks their new position and distance information. The topography ensures how their communication will be based on the movement of the nodes.
In a fixed network: If the nodes are static, the God object makes fixed routing and connectivity decisions based on the topography.

God object & topography

GOD Object & Topography in Hindi | God Object and Topography in a Wireless Network in Hindi:

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