A mobile ad hoc network (MANET), is a self-configuring network of mobile devices connected by wireless links. The Ad hoc networks are a new wireless networking paradigm for mobile hosts. Wireless adhoc network is autonomous, infrastructure less and may be mobile depending on its type of application. Secure transmission of information in wireless adhoc environment is an important concern. In thi...

Several routing schemes proposed for ad hoc networks assume that all mobile hosts have the same transmission power and bandwidth constraints. However, in real world, this assumption may often not be true since there exist many types of mobile hosts with diierent transmission capacity and mobility rate. This paper discusses a new ad hoc network architecture, called`Physically Hierarchical Ad hoc...