Mangesh Prakash Vasu

3 Rd Year B.E

Dept. Of Computer Science And Engineering,

College Of Engineering And Tech Akola

Ad Hoc Networks: Overview, Applications And Issues

Contents IntroductionDefinitionAd hoc Networks – Operating PrincipleAd hoc networking issuesApplications

• Introduction – What is Ad-hoc Network? Decentralized Type Of Wireless Network It Consists Of Mobile Node

Ex- Bluetooth Enabled Mobile Phones Such As 3G, Laptops. The Nodes Are Short Life Forming Temporary Network The Ad-hoc Network Does Not Have Any Centralized

Structure

Introduction – What is Ad-hoc Network The Ad-hoc Network Does Not Have Any Network Infrastructure The Determination Of Nodes Is Made Dynamically Base On Network

Connectivity Ad-hoc Network Are Peer-to-peer Network

Types Of Wireless Ad- Hoc Networks Wireless Mesh Network Mobile Ad Hoc Network (MANET) Wireless Sensor Network (VSN) Vehicular Ad- Hoc Network (VANET) Ad Hoc Networks Intelligent Vehicle Ad-hoc Network( In VANET)

definition :-

• A decentralized type of wireless network, allowing people and devices to seamlessly internetwork in areas with no pre-existing communication infrastructure, It can turn the dream of networking at any place and at time into reality. We are almost there by the way .Ex- Bluetooth enabled mobile phones such as 3G, laptops, handheld digital devices, personal digital assistants, or wearable computers

Ad hoc Networks – Operating Principle

Single hop communication:-

Mobile node A communicates directly with Mobile node B when a channel is available.

Ad hoc Networks – Operating Principle

Multi-hop communication:- If Channel is not available, then multi-hop

communication is necessaryE.g.- A C D E For multi-hop communication to work, the intermediate nodes

should route the packet i.e. they should act as a router.

For communication between node A node E, C,D act as router .

Ad hoc networking issuesI. Autonomous and infrastructure-less :-

a) distributed peer-to-peer mode

b) independent router

II. Multi-hop routing : -

a) No default router available,

b) every node acts as a router

III. Dynamically changing network topologies :-

network topology can change frequently and unpredictably

IV. Variation in link and node capabilities: -

a)Each node may be equipped with one or more radio interfaces possibly asymmetric links.

b) different software/hardware configuration.

c) Designing network protocols can be complex.

V. Energy constrained operation: -

a) mobile node have limited power supply, processing power is limited.

b)limits services and applications.

VI. Network scalability :-

a) A system whose performance improves after adding hardware, proportionally to the capacity added, is said to be a scalable system

b) An algorithm design, networking ,protocol, program, or other system is said to scale if it is suitably efficient and practical when applied to large situations (e.g. a large input data set, a large number of outputs or users, or a large number of participating nodes in the case of a distributed system).

Ad hoc networking issues

Applications of ad hoc networks :-

Military operationsBluetooth for personal useDisaster recovery environmentsSmall wireless networks

Conclusions:-It can be concluded that the ad-hoc networks are very

useful but the effective deployment needs effective solutions for the issues fault detection and management, Network scalability , pocket losses etc.

Questions ?.

Thank you

14 march 2014 presentation at Rajarshri shahu college of Engineering , Buldhana