Abstract
We present a Hierarchical Hybrid Network architecture for wireless networks. In such a network, mobile nodes are hierarchically organized into groups. Different groups can have different routing protocols. Mobile nodes communicate with nodes outside their groups through the group agents. The groups are highly autonomous. This architecture is flexible and scalable. We conduct experiments to compare the new architecture with Ad Hoc networks. The new architecture has a more stable topology and higher throughput when the number of mobile nodes is large. The objective of our research is to set up a survivable, secure mobile wireless network.