Course of wireless communication system

Name: Omar Abdel-Raouf Al-Halabi

Ad hoc wireless network

The presentation & report of AD HOC

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Abstract

Ad Hoc means for a special purpose, or applying to a specific thing or situation. An ad-hoc network is a self-configuring network of wireless links connecting mobile nodes. These nodes may be routers and/or hosts. The mobile nodes communicate directly with each other and without the aid of access points, and therefore have no fixed infrastructure. They form an arbitrary topology, where the routers are free to move randomly and arrange themselves as required.

Each node or mobile device is equipped with a transmitter and receiver. They are said to be purpose-specific, autonomous and dynamic. This compares greatly with fixed wireless networks, as there is no master slave relationship that exists in a mobile ad-hoc network. Nodes rely on each other to established communication, thus each node acts as a router. Therefore, in a mobile ad-hoc network, a packet can travel from a source to a destination either directly, or through some set of intermediate packet forwarding nodes.

Ad hoc networks have the following characteristics:

1. New members can join and leave the network any time
2. No base station to provide connectivity to backbone hosts or to other mobile hosts
3. No need for handover and location management
4. Each node acts as a router ,forwarding packets from others nodes
5. can be tailored for specific application (military application)

Table of content:

1. application of wireless network (data, home, device and sensor network)
2. design principles
3. protocol layers
4. network capacity limits
5. energy-constrained networks

References:

1. Wireless Communications: by Andrea Goldsmith
2. wireless communication and networking: Jon w.mark
3. Internet (http://www.antd.nist.gov/wahn_home.shtml)