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Mobile ad hoc network researchers face the challenge of achieving full functionality with good performance while linking the new technology to the rest of the Internet. A strict layered design is not flexible enough to cope with the dynamics of manet environments, however, and will prevent performance optimizations. The MobileMan cross-layer architecture offers an alternative to the pure layered approach that promotes stricter local interaction among protocols in a manet node

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Using location information to help routing is often proposed as a means to achieve scalability in large mobile ad hoc networks. However, location-based routing is difficult when there are holes in the network topology and nodes are mobile or frequently disconnected to save battery. Terminode routing, presented here, addresses these issues. It uses a combination of location-based routing (Terminode Remote Routing, TRR), used when the destination is far, and link state routing (Terminode Local Routing, TLR), used when the destination is close. TRR uses anchored paths, a list of geographic points (not nodes) used as loose source routing information. Anchored paths are discovered and managed by sources, using one of two low overhead protocols: Friend Assisted Path Discovery and Geographical Map-based Path Discovery. Our simulation results show that terminode routing performs well in networks of various sizes. In smaller networks, the performance is comparable to MANET routing protocols. In larger networks that are not uniformly populated with nodes, terminode routing outperforms existing location-based or MANET routing protocols.

We simulated terminode routing as presented in [6]. This routing scheme is designed for wide area networks, where a large part or all the nodes are mobile. Terminode routing is a combination of two protocols called Terminode Local Routing (TLR) and Terminode Remote Routing (TRR). TLR is used to route packets to close destinations. TRR is used to route to remote destinations and is composed of the following elements: Anchored Geodesic Packet Forwarding (AGPF), Anchored Path Discovery (APD), multipath routing and path maintenance. We performed simulations of the TLR and TRR protocols using the GloMoSim simulator. In order to do that, we have implemented a new mobility model that we call "restricted random waypoint". This model is closer to a real-life situation for a wide-area mobile ad hoc network than the random waypoint model. We performed our simulation on a topology based on towns and highways. Towns are areas that are connected with highways. Inside town areas, terminodes move with the random waypoint mobility model. After a certain number of movements in the same town, a terminode moves to another town. The simulation results for a large, highly mobile ad-hoc environment demonstrate benefits of the combination of TLR and TRR over an existing protocol that uses geographical information for packet forwarding.

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