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Ad-Hoc Network

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Himanshu Patel

on 10 March 2013

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Transcript of Ad-Hoc Network

Ad-Hoc Network Introduction Wireless Sensor Network Table Driven Routing Protocols An Ad-hoc network is local area network or some other small network, especially one with wireless (or temporary plug in connections), in which some of the network devices are the part of the network only for the duration of communications session.

Allows new network devices to be quickly added. A wireless sensor network (WSN) consists of spatially distributed autonomous sensors to monitor physical or environmental conditions.

such as temperature, sound, pressure, etc. and to cooperatively pass their data through the network to a main location. Also known as Proactive Protocols

Each node uses routing information to store the location information of other nodes in the network and this information is then used to move data among different nodes in the network.

This types of protocol is slow to converge and may be prone to routing loops. Created By :

Himanshu Patel
Harshil Rana
Sanjay Yadav Content Introduction
Wireless Ad-Hoc Network
Routing Protocols
Pros and cons
Conclusions Mobile Ad-Hoc Network A mobile ad-hoc network (MANET) is a self-configuring infrastructure less network of mobile devices connected by wireless.

Each device in a MANET is free to move independently in any direction, and will therefore change its links to other devices frequently. Wireless Ad-Hoc Network A wireless ad-hoc network is a decentralized type of wireless network.

Wireless network refers to any type of computer network that is not connected by cables of any kind. It is a method by which homes , telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Wireless Mesh Network A wireless mesh network(WMN) is a communications network made up of radio nodes organized in a mesh topology.

Wireless mesh networks often consist of mesh clients, mesh routers and gateways.

The mesh clients are often laptops, cell phones and other wireless devices while the mesh routers forward traffic to and from the gateways which may, but need not, connect to the Internet. Routing protocols between any pair of nodes within an ad hoc network can be difficult because the nodes can move randomly and can also join or leave the network

Three categories of ad-hoc network routing protocols :

1. Table Driven protocols
2. On Demand Protocols
3. Hybrid Protocols Routing Protocols Applications Mobile Ad-Hoc Network (MANET)

Wireless Sensor Network (WSN)

Wireless Mesh Network (WMN) On Demand Routing Protocols Also known as Reactive Protocols

Establish routes between nodes only when they are required to route data packets.

When a route is required by a source node to a destination for which it does not have route information, it starts a route discovery process which goes from one node to the other until it arrives at the destination or a node in-between has a route to the destination. Hybrid Routing Protocol Combine Table Based Routing Protocols with On Demand Routing Protocols.

Each node in the network has its own routing zone, the size of which is defined by a zone radius, which is defined by a metric such as the number of hops. Advantages of Ad-Hoc Network Independence from central network administration

Node is also router

The Addition of more nodes possible

Access the internet from any different locations Disadvantages of Ad-Hoc Network Each node must have full performance

Throughput is affected by system loading

Reliability required a sufficient number of available nodes

Large networks can have excessive time delay, which affects some applications Wireless Mesh Network Wireless Sensor Network Wireless Sensor Network continue... The development of wireless sensor networks was motivated by military applications such as battlefield surveillance.

Today such networks are used in many industrial and consumer applications, such as industrial process monitoring and control, machine health monitoring Wireless Mesh Network Continue.... The coverage area of the radio nodes working as a single network is sometimes called a mesh cloud.

Access to this mesh cloud is dependent on the radio nodes working in harmony with each other to create a radio network.

A mesh network is reliable and offers redundancy. When one node can no longer operate, the rest of the nodes can still communicate with each other, directly or through one or more intermediate nodes. Types Of Mobile Ad-Hoc Network Vehicular Ad-hoc Networks Hidden Terminal Multihop network – each device must carry burden of routing packets from source to destination
Each Node handles part of the management of the network
Fault detection is extremely difficult because of the distributed design MANET Management B C A Node A and Node B simultaneously try to communicate with Node C. Their traffic collides and both packets are lost at Node C. Collision Risk and Packet Loss Internet Based Mobile Ad-hoc Networks Vehicular Ad-hoc Networks A Vehicular Ad-Hoc Network, or VANET is a technology that uses moving cars as nodes in a network to create a mobile network.

VANET turns every participating car into a wireless router or node, allowing cars approximately 100 to 300 meters of each other to connect and, in turn, create a network with a wide range.

This technology used in police and fire vehicles to communicate with each other for safety purposes. Internet Based Mobile Ad-hoc Networks Internet-based mobile ad hoc networking is an emerging technology that supports self-organizing, mobile networking infrastructures which connected to the greater Internet.

Mobile ad hoc networks are designed to operate in widely varying environments, from forward-deployed military MANETs with hundreds of nodes per mobile domain to applications of low-power sensor networks and other embedded systems. In Ad-hoc network, the wireless router is replaced by the wireless computer that can well act as a wireless router. Ad Hoc Networks
The Need of “TIME”. Today the networks normally developed are of the type having some fixed infrastructure. What would be the solution if the network is required to be made for some short period of time?
Conclusions Ad-hoc networking will play an important role in this evolution. Its internal flexibility, ease of maintenance, lack of needed infrastructure, auto configuration, self-administration capabilities, and significant cost advantages make it a prime candidate.

In moving forward and successfully fulfilling this opportunity, developing and seamlessly integrating MANET with other wireless networks and fixed internet infrastructures, will play a critical role.

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