Mobile Ad-hoc Networks (MANETs) are future wireless networks consisting entirely of mobile nodes that communicate on-the-move without base stations. Nodes in these networks will both generate user and application traffic and carry out network control and routing protocols. Rapidly changing connectivity, network partitions, higher error rates, collision interference, and bandwidth and power constraints together pose new problems in network control—particularly in the design of higher level protocols such as routing and in implementing applications with Quality of Service requirements. Here we provide a tutorial overview of these networks, with descriptions and models of the main components and issues, including mobility models, a channel model, MAC layer issues and methods, Routing issues and methods, and Dynamic Power Regulation .