Ad Hoc Network Advantages And Disadvantages

I. INTRODUCTION

Ad-hoc network is a collection of mobile nodes which can communicate without each other with the help of wireless. There is no former communication infrastructure in MANETs. [1]. There is no fixed infrastructure and centralized control in MANETs therefore nodes can communicate the network at any time. All nodes are supposed to be equal in processing power. All nodes can act either as a host or as a router to direct the packet from source to destination in the network. Every nodes move as routers and are capable of discovering and maintaining routes to circularize the packets to the destinations. [2] There are lots of advantages promised tpye of network in terms of cost and flexibility compared to network with infrastructures.

MANETs Applications

The ad hoc networks can be classified different type of application as Mobile Ad hoc Network (MANET) which is a self-arranging infrastructure small network for communicated through wireless connection. Vehicular Ad hoc Network (VANET) uses travelling vehicular as nodes in a network to create a mobile network. Wireless Sensor Network (WSN) consists of independent sensors to control the ecological actions. Some of the typical applications include:

• Military field of battle: MANETs allow the military to take advantage field to maintain an information network between the air force, army, vehicles, and military information head sector. The ad hoc network techniques to communication from this field.

• Commercial Area: To need for commercial computing force be very important outside office environments than inside and where people do need to have outside meetings to cooperate and exchange information on a given project.

• Regional level: The Ad-Hoc networks can user separately link an temporary multimedia network using notebook computers to spread and dispense information among participants at a e.g. conference or

It is also known as Table Driven Routing. Every discovery mechanism consume bandwidth to keep routes up-to-data. Packet forwarding is faster in these schemes as the route is already present.

Reactive Routing: The reactive schemes determine the route when needed. They have smaller route discovery overheads. They employ a flooding mechanism. A node trying to transmit a packet may have to wait for route discovery. The scalability as there is only light traffic. Reactive route caching can be reduced.

Hybrid Routing: The hybrid approach contains the feature of both proactive and reactive routing. This is maintains the routes to nearby nodes even if they are not needed and maintain routes to for away nodes only when they needed.

TABLE1: Comparison of Routing Approaches (Proactive, Reactive and Hybrid Routing)

S No. Parameters Proactive Routing Reactive Routing Hybrid Routing

1 Layout of Network Flat and Hierarchical Flat Flat and Hierarchical

2 Memory High Lower than proactive Depend upon number of nodes forming zone

3 Path Accessibility Available when needed Mostly available after initial execution of Protocol