This paper presents a study on three simulation tools for Wireless Sensor Nertworks (WSNs): Network Simulator 2 (ns-2), Java Simulator (J-Sim) and Sensor Network Emulator and Simulator (SENSE). We present the concept of WSNs, each simulator in terms of its features, a view on current applications of WSNs on medicine and a comparative study on the simulators studied. We conclude that SENSE prese...

This paper proposes a simple methodology for constructing extensible and high-fidelity TCP/IP simulators in BSD UNIX environments. A simulator constructed under this methodology will simulate multiple network nodes by re-entering the UNIX kernel of the simulation host multiple times. Generated simulation results are derived from executing the native TCP/IP protocol stack on the simulation host....

This paper discusses the impact of network architecture on control performance in a class of distributed control systems called networked control systems (NCSs) and provides design considerations related to control quality of performance as well as network quality of service. The integrated network-control system changes the characteristics of time delays between application devices. This study...

The computing industry is currently undergoing a quiet revolution. Along with the recent advances in LSI design and production, a new trend in computation is forming. Many corporations are realizing that an important part of the future of computers lies in distributed data processing. The emphasis here is not on distributed data, for this field has been extensively (though certainly not complet...

The emergence of wireless sensor networks brought many open issues to network designers. Traditionally, the three main techniques for analyzing the performance of wired and wireless networks are analytical methods, computer simulation, and physical measurement. However, because of many constraints imposed on sensor networks, such as energy limitation, decentralized collaboration, fault toleranc...

This paper proposes a new methodology for easily constructing extensible and high-fidelity TCP/IP network simulators. The methodology uses a kernel-reentering technique to reuse the existing real-life network protocol stacks, real application programs that generate traffic, and real utility programs that configure, monitor, or gather network statistics to the maximum extent. Only an event sched...

High performance computing (HPC), both at hardware and software level, has demonstrated significant improvements in processing large datasets in a timely manner. However, HPC in the field of air traffic management (ATM) can be much more than only a time reducing tool. It could also be used to build an ATM simulator in which distributed scenarios where decentralized elements (airspace users) int...

This paper discusses the development of an interactive soundscape simulator, enabling users to manipulate a series of parameters to investigate if there is group correlation between factors such as source selection, positioning and level. The basis of the simulator stems from fieldwork and recordings carried out in London and Manchester. Through the use of an enhanced version of soundwalking, r...

The development of network protocols, especially if designed for use in very large scale networks, generally requires extensive simulation and tests in operational environments to assess their performance and correctness. Both approaches have limitations: simulation because of possible lack of accuracy in modeling the system (and, especially, traf-c generators), tests in operating networks beca...