Wireless networking is the mostly used networking technique in this era of telecommunication.when the term wireless„comes, it reminds the importance of 802.11 mac protocol. For the rural areas like villages, 802.11 mac protocol plays a important role for networking because of its cost, which is very low as compared to the other networking. Moreover the mac protocol provides higher rate of data ...

Wireless networking is the mostly used networking technique in this era of telecommunication.when the term wireless„comes, it reminds the importance of 802.11 mac protocol. For the rural areas like villages, 802.11 mac protocol plays a important role for networking because of its cost, which is very low as compared to the other networking. Moreover the mac protocol provides higher rate of data ...

This paper describes an Advanced Train Control System (ATCS) simulation environment created using the Network Simulator 2 (ns-2) discrete event network simulation system. The ATCS model is verified using ATCS monitoring software, laboratory results and a comparison with a mathematical model of ATCS communications. The simulation results are useful in understanding ATCS communication characteris...

The ns-2 is a widely used network simulation tool which implements a fairly old and weak random number generator (RNG). As the RNG component is used by a variety of other components, it can be seen as one of the most important core components of the ns-2. In this paper we explore weaknesses of this RNG and demonstrate its shortcomings in context with a simple simulation example (M/D/1) which pr...

The code provided between the lines is not complete. You are asked to add your own code. Consider a simple network composed of only two nodes (S and D), and one link connecting them. The link connecting the two nodes has a speed of 1Mbps, a propagation delay of 100 ms, and a DropTail buffer at its input of very large size. $ns duplex-link $S $D 1Mb 100ms DropTail $ns queue-limit $S $D 10000 We ...

Ranging from the development of new protocols to validating analytical performance metrics, network simulation is the most prevalent methodology in the field of computer network research. While the well known ns-2 toolkit has established itself as the quasi standard for network simulation, the successors are on their way. In this paper, we first survey recent contributions in the field of netwo...

Analysis and design of network systems relies on simulation models that can describe important traits such as performance and scalability. Essential for specifying network designs are concepts and methods that can support developing well-formed simulation models. The network simulator ns-2 can be used to model and simulate high resolution dynamics of network protocols. For developing new or exi...

NS-2 (Network Simulator) is one of the most popular discrete event simulators used for network simulation. Trace files produced by NS-2 provide very useful information for post simulation analysis. This paper presents the architecture and development considerations for a TRAce FILe analysis tool, which intends to simplify the management of trace files generated during network simulations. The t...

In this paper, we argue that simulation of Networked Control Systems (NCSs) needs to be carried out through co-simulation, which requires the joint and simultaneous simulation of both physical and communication networks dynamics. Co-simulation enables construction of synthetic large-scale networks and workloads, replay of collected traces, and obtaining a complete snapshot of both the network b...