Mobile Ad-Hoc Network

Presented by,– Teja Babu Sura– Pavan Kumar

Mobile Ad-Hoc NetworkThe term MANET (Mobile Ad-hoc Network) refers to a multi hop packet

based wireless network composed of a set of

mobile nodes that can communicate and move

at the same time , without using any kind of fixed wired infrastructureTypes of MANET :-

Vehicular Ad-hoc Networks (VANETs)

Internet Based Mobile Ad-hoc Networks (iMANET)

How MANET works

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.

Effect Of MANET On The Protocol Stack Application

New applications and adaptations(Malicious code)Transport

Congestion and flow control(Session hijacking, Flooding)

Network Addressing and routing(Link Spoofing, Location disclosure)Data-Link

Media access(Malicious Behavior)Physical

Transmission errors and interference(Interference, Traffic Jamming)

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Many ApplicationsPersonal area networking– cell phone, laptop, ear phone, wrist watchMilitary environments– soldiers, tanks, planesCivilian environments– taxi cab network– meeting rooms– sports stadiums– boats, small aircraftEmergency operations– search-and-rescue– policing and fire fighting

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ChallengesLimited wireless

transmission rangeMobility-induced route

changesBattery constraintsEase of snooping on

wireless transmissions (security hazard)

Broadcast nature of the wireless

mediumPacket losses due to

transmission errorsPotentially frequent

network partitions

ConclusionAd hoc networks can be implemented

using various techniques like Bluetooth or WLAN for example

Although work is being done and prototype protocols are available for experiments mobile ad hoc network still have difficulties.

While some basic network control functions and routing procedures have been developed many other issues require attention.

Rapidly changing topology, network partitions, higher error rates, collision interference, bandwidth constraints and power limitations together pose new challenge in network control;

Especially in the design of the higher level protocols for routing and in implementing applications with quality of service requirements