With recent performance advancements in computer and wireless communication technologies, advance mobile wireless computing is expected to see increasingly widespread application. The vision of mobile ad hoc networking is to support robust and efficient operation in mobile wireless networks are envisioned to have dynamic, sometimes rapidly changing, random, multiple technologies, which will be composed of relatively bandwidth constrained wireless links.
Since their emergence in 1970’s, wireless networks have become increasingly popular in the computing industry. These networks provide mobile users with computing capability and information access regardless of the location. There are currently two variations of mobile wireless networks-infrastructure and infrastructure-less networks.
The infrastructure networks, also known as Cellular Networks, have fixed and wired gateways. They have fixed base stations, which are connected to other base stations through wires. The transmission range of a base station constitutes a cell. All the mobile nodes lying within this cell connect to and communicate with the nearest base station. A “handoff” occurs as mobile host travels out of range of one base station and into the range of another. Thus the Mobile host is able to continue communication throughout the network.
The infrastructure-less networks, are known as Mobile Ad-hoc Networks (MANET). These networks have no fixed routers. All nodes capable of movement and can be connected dynamically in arbitrary manner. The responsibilities for organizing and controlling the network are distributed among the terminals themselves. The entire network is mobile, and the individual terminals are allowed to move at will, relative to each other. In this type of networks, some pairs of may not be able to communicate directly with each other and relaying of some message is required, so that they are delivered to their destination. The nodes of these... [continues]
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