Ad Hoc Networks Technical Issues on Radio Links Security&QoS

Mobile ad hoc networks (MANETS) are self-created and self organized by a collection of mobile nodes, interconnected by multi-hop wireless paths in a strictly peer to peer fashion. Mobile Ad-hoc Network (MANET) is a collection of wireless mobile hosts without fixed network infrastructure and centralized administration. Communication in MANET is done via multi-hop paths. Lots of challenges are there in this area, MANET contains diverse resources, the line of defense is very ambiguous, Nodes operate in shared wireless medium, Network topology changes unpredictably and very dynamically, Radio link reliability is an issue, connection breaks are pretty frequent. Moreover, density of nodes, number of nodes and mobility of these hosts may vary in different applications. There is no stationary infrastructure. Each node in MANET acts a router that forwards data packets to other nodes.