The coupling of real implementations with simulations helps the developer to better understand the behavior of the real system by shifting to the simulation the parts of the overall system that he cannot influence. This was done for MPI programs in MPI-...

In this paper, we briefly report on our ongoing work to extend the GNU Radio software suite with a ray tracing based radio channel simulator. Radio channel simulation is an important aspect in the design and evaluation of wireless protocols because ...

Energy-awareness and resilience are becoming increasingly important in network research. So far, they have been mainly considered independently from each other, but it has become clear that there are important interdependencies. Resilience should be ...

Network simulation and emulation environments play a crucial role in evaluating proposed protocols, applications, and networked systems. In such settings, the ability to scalably and efficiently generate traffic that has characteristics similar to those ...

One of the main difficulties when modeling Underwater Wireless Sensor Network (UWSN) has to do with the environment characteristics and the acoustic signal typically used. As stated in other works, the accuracy of the acoustic propagation model and the ...

Networks must be resilient to challenges such as malicious attacks or network overload and adapt their operation in an autonomous manner. Network simulations enable the testing of complex network scenarios (which would be difficult to emulate using ...

Wireless Mesh Networks (WMNs) have proven to be a key technology for increased network coverage of Internet infrastructures. The development process for new WMN protocols and architectures is typically split into evaluation by network simulation and ...

ns-2 is a well known network simulator, recently extended with improvements to its emulation facility. Real-time constraints and the boundary between real-world and simulated entities impose scalability and accuracy limitations, and distort the ...

Recently, many efforts have been made to develop more efficient Inter-Vehicle Communication (IVC) protocols for on-demand route planning according to observed traffic congestion or incidents, as well as for safety applications. Because practical ...

This paper presents an accurate simulation framework for video streaming evaluation. We have designed a full RTP/RTCP implementation for NS-2 and we propose to combine it with several multimedia tools to obtain an RTP-based tool-set that allows the ...

This paper studies the topology control in heterogeneous mobile ad hoc networks (MANETs), where mobile nodes have different transmission ranges and moving speeds. We consider symmetric communication model where two nodes can communicate directly if and ...

We present and evaluate HYDRA, a virtualized testbed for realistic large-scale network simulations. While classic simulation tools only provide approximations of the protocol stack, HYDRA virtualizes nodes running a complete Linux system. Mobility ...

PeerCast is a classical software of P2P streaming media. In this paper, an NS2-based PeerCast network simulation system was constructed for simulating the PeerCast protocol. Then we found two shortcomings of the PeerCast and proposed a multipath ...

The paper addresses the design-space exploration of network alternatives for complex distributed systems of embedded devices, e.g., for smart power grid or telecommunication services. While past research mainly provided efficient programming ...

The effective transmission of traffic involving the sense of touch (haptics) presents a significant challenge to the current Internet architecture. It is now accepted that the Quality of Service (QoS) needed to support haptic feedback in networks will ...

The network simulation (NS) is an important issue in the study of network technology. However, The error between the network performance simulation on split-object model and the true network environment is considerable apparent. In order to obtain the ...

The Self Similar nature of Internet traffic is a widely known phenomenon. This paper studies the impact of such traffic on a variety of wireless LAN scenarios. Simulations are carried out using the QualNet simulator. These are compared to estimated ...

Vehicular communication systems are becoming one of the most emerging research areas. Many efforts have been made to provide new applications and communication protocols adapted to this new kind of networks. The performance evaluation of these proposals ...

NeSSi network security simulator is a novel network simulation tool which incorporates a variety of features relevant to network security distinguishing it from general-purpose network simulators. Its capabilities such as profile-based automated attack ...

The past few years have seen an increasing interest in the development of vehicular ad hoc networks resulting in many routing protocols proposals. This paper presents the results of a detailed performance evaluation of three of these protocols selected ...