Ad-hoc networking is a concept in computer communications. Each node participating in the network acts both as host and a router and must therefore is willing to forward packets for other nodes. Research in this area is mostly simulation based; Random waypoint is the commonly used mobility model in these simulations. Random waypoint is a simple model that may be applicable to some scenarios. In...

Bei der Untersuchung von Verteilungsprotokollen in mobilen Ad-hocNetzen spielt das zugrundeliegende Bewegungsmodell eine wichtige Rolle, da von ihm auch die Leistung der Protokolle beeinflusst wird. Bisher wurde in vielen Untersuchungen das Random Waypoint Bewegungsmodell verwendet. In diesem Beitrag wird ein neues Bewegungsmodell, das Area Graph basierte Bewegungsmodell, vorgestellt, welches v...

In performance studies of vehicular ad hoc networks, the underlying mobility model plays a major role. In this paper, we investigate the influence of three mobility models on the performance of ad hoc network routing protocols (AODV and GPSR). As a benchmark, we use the popular random waypoint mobility model. Our second model is based on a vehicular traffic simulator that we proposed in earlier...

E xascale computing—computing capability that can achieve at least a billion billion operations per second, 50 to 100 times more powerful than the nation’s fastest supercomputers in use today—is the next waypoint in high-performance computing (HPC). Achieving such speeds isn’t an easy task. To be useful to a wide spectrum of applications, in addition to peak speed, supercomputers need to have l...

The random waypoint model (RWP) is one of the most widely used mobility models in performance analysis of mobile wireless networks. In this paper we extend the previous work by deriving an analytical formula for the stationary distribution of a node moving according to a RWP model in n-dimensional space. © 2004 Elsevier B.V. All rights reserved.

The purpose of this project was to create a mode of pedestrian navigation via a single head mounted vibrotactor. Our intention was to achieve accurate waypoint navigation with fewer tactors than in previous works, thereby introducing a simpler system and increasing cost effectiveness. Test results concluded that average walking speeds through our course were similar when given verbal direction ...

The simulation of mobility models such as the random waypoint often cause subtle problems, for example the decay of average speed as the simulation progresses, a difference between the long term distribution of nodes and the initial one, and sometimes the instability of the model. All of this has to do with time averages versus event averages. This is a well understood, but little known topic, ...

This paper considers the problem of generating optimal guidance trajectories for high-speed waypoint transitions by an autonomous helicopter. Given a set of waypoints and a desired order for passing through them, an optimal control problem is solved using collocation for every pair of consecutive waypoints. The linear hover model of the Yamaha R-50 helicopter is employed in the optimal control ...