Mobile Adhoc Network MANET full report

[seminar class]

Presented by:
PUROHIT PRIYANK Y.

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Mobile Ad-hoc Networks (MANET)
A introduction to MANET
 In Latin, ad hoc means "for this," further meaning "for this purpose only.- It is a good and description of the idea why ad hoc networks are needed. They can be set up anywhere without any need for external infrastructure (like wires or base stations). They are often mobile and that's why a term MANET is often used when talking about Mobile Ad hoc NETworks. MANETs are often defined as follows: A "mobile ad hoc network" (MANET) is an autonomous system of mobile routers (and associated hosts) connected by wireless links - the union of which forms an arbitrary graph.
WHAT IS MANET ?
 MANET – (Mobile Ad-Hoc NETwork) a system of mobile nodes (laptops, sensors, etc.) interfacing without the assistance of centralized infrastructure (access points, bridges, etc.)
 Rapidly extend, self configuring.
 No need for existing infrastructure.
 Wireless links.
 Nodes are mobile, topology can be very dynamic.
 A MANET can be a standalone network or it can be connected to external networks (Internet).
 Each device in a MANET is free to move independently in any direction, and will therefore change its links to other devices frequently. Each must forward traffic unrelated to its own use, and therefore be a router. The primary challenge in building a MANET is equipping each device to continuously maintain the information required to properly route traffic. Such networks may operate by themselves or may be connected to the larger Internet.
 In an ad-hoc wireless network all of the devices are wireless. There is no need for an infrastructure connection. If you want to transfer a file from one laptop to another there is no need for a wired connection.
Ad-hoc connections are temporary, and not designed to stay around for long periods of time. They are connections between mobile devices and do not need to connect to other parts of a network.
Example of a MANET
Types of MANET
 Vehicular Ad Hoc Networks (VANETs) are used for communication among vehicles and between vehicles and roadside equipment.
 Intelligent vehicular ad hoc networks (InVANETs) are a kind of artificial intelligence that helps vehicles to behave in intelligent manners during vehicle-to-vehicle collisions, accidents, drunken driving etc.
 Internet Based Mobile Ad hoc Networks (iMANET) are ad hoc networks that page link mobile nodes and fixed Internet-gateway nodes.
CHARACTERISTICS ?
 Communication via wireless.
 Nodes can perform the roles of both hosts and routers.
 No centralized controller and infrastructure. essential mutual trust.
 Dynamic network topology.
 Autonomous, no infrastructure needed.
 Can be set up anywhere.
 Energy constraints
 Limited security
 five main security services for MANETs:
 Authentication :means that correct identity is known to communicating partner;
 Confidentiality means certain message information is kept secure from unauthorized party;
 Integrity means message is unaltered during the communication;
 No repudiation means the origin of a message cannot deny having sent the message;
 availability means the normal service provision in face of all kinds of attacks
APPLICATION AREAS ?
 Military or police exercises.
 Disaster relief operations.
 Mine site operations.
 Urgent Business meetings
Advantages
• They provide access to information and services regardless of geographic position.
• These networks can be set up at any place and time.
• These networks work without any pre-existing infrastructure.
Disadvantages
• Limited resources. Limited physical security.
• Intrinsic mutual trust vulnerable to attacks.
Lack of authorization facilities.
• Volatile network topology makes it hard to
detect malicious nodes.