File Name: modeling and simulation of computer network using opnet writer.zip
Simulation tools are essential for validating any research idea before it is being implemented. This is very essential for all the researchers irrespective of the field of research. Simulators provide a way for analysing the design.
Simulation tools are essential for validating any research idea before it is being implemented. This is very essential for all the researchers irrespective of the field of research. Simulators provide a way for analysing the design. There are many simulation tools available for the network researchers. Network Simulators are used to test the performance of existing or new algorithms and protocols. Simulation tools may be open source or commercial. In this paper, both the open source and commercial simulators are discussed.
For small network simulation NS-2 and J-Sim can be preferred. Open source simulators are poor in documentation. Commercial simulators have good documentation. Based on the requirements of the research, a proper simulation tool can be selected. Simulators play an important role in research. Network Simulators are used to design and evaluate the network algorithms and routing protocols under varying network conditions Breslauet al. These networks are used in emergency situations such as in battlefields and emergency medical rescue.
For routing in Mobile Ad hoc Networks, routing protocol must be deployed. Before implementing the routing protocol its behaviour must be analysed by simulation. So network simulators are used for simulating these routing protocols or other algorithms in wired and wireless networks. The organization of the rest of the paper is as follows: Next section discuss about the related work in simulator survey.
Section 3 deals with different network simulation tools that are available for network research. It also describes the merits and demerits of the simulators.
Section 4 presents the comparison of about nine network simulators based on the parameters like license, operating system and language used, year of release, user interface, protocol and mobility support, scalability, extendibility, documentation, network and emulation support etc. Last section concludes with the consolidation of merits and demerits of the simulators and suggests the design of new simulator that satisfies all the requirements of the researcher as future enhancement.
Many researchers have presented the survey on various network simulation tools. Some features of these simulators such as the languages involved and the network supported by them were discussed and their limitations were presented.
In addition to this, the issues related to documentation, installation were also discussed. But this survey does not deal with the protocols and the mobility models supported by the simulator. The main features of the open source simulators were presented along with their advantages and disadvantages. The architecture of the four simulators was also explained.
This survey may not be considered as a complete survey of network simulation tools because they have considered only the open source simulators. Commercial simulators were not taken into account by the authors. Nearly fifteen simulation tools were discussed and a comparative study of selected simulators were made based on certain evaluation metrics like energy model, mobility model, license, bridging of code, scalability, protocol support, technical support and GUI support.
Many features of the simulator were presented but it lacks in the types of protocols supported by the simulator in different layers and the mobility models. In this survey, the details of the individual feature of the simulators were not clearly mentioned. According to the authors, integration of different simulators may be useful for getting better results.
They discussed the features, advantages and disadvantages of the above mentioned four simulators. Then comparison of these simulators was done based on certain mainstreams like emulation support, license, GUI, interface, available modules, documentation and user support, scalability, extendable and simulation technique.
Several network simulators are available but only four simulators were described by the authors in this survey. They added that GloMoSim can be used for large network simulation. Only limited features of simulators were highlighted in this survey. In their survey they found that most of the papers published in IEEE conference and proceedings use NS-2 for network modelling and simulation task.
Three specific recommendations were provided by the authors for the network researchers such as to choose a credible simulator, to build credible simulation models and to use statistical methods to improve the credibility of results. Our survey contributes a lot to network researchers in identifying the simulator for their research work.
In this survey, all the important features of the simulators are considered which helps the researchers in choosing the proper simulator for their work based on the requirement. This survey differs from the existing surveys in two factors i The protocols supported in different layers such as application layer, transport layer and network layer are listed clearly ii The latest version of the simulator with released date updated till is mentioned. These two factors are not included in the existing surveys.
Many simulators are available nowadays which makes simulator selection process as a time consuming one for the researchers. This survey is necessary for the network researcher which helps them by saving their time in simulator selection. Open source simulation tools can be freely downloaded from their official website. Commercial simulators need license and it must be purchased for high rate. In this paper both commercial and open source simulators are reviewed.
The details of these simulators along with their merits and demerits are discussed in this section. They are collected from the official website, user manual and existing surveys. It is a commercial Object Oriented Discrete event general purpose simulator.
OPNET is high level and event based network level simulation tool. OPNET is very powerful and large software with many features. It was developed for military purpose, but latter it rises to be one of the leading commercial network simulation tools.
OPNET is very expensive for commercial purpose but there are free licenses for educational uses. It is used for modelling, simulating, analysing and designing protocols, devices and networks. It contains a large library of accurate models for commercially available fixed network protocols and hardwares.
It has various tools like OPNET modeler, model editors, model library, analysis tools and animation viewer. Provides user friendly graphical interface. Supports high fidelity modelling, simulation, analysis and designing of wide range of communication networks. It was monitored by Naval Electronics Systems Command.
The last version was REAL REAL can simulate packet switched, store and forward networks that is similar to wide area networks Keshav, REAL has two parts namely simulation server and display client.
It was implemented as a simulation tool for analysing the dynamic behaviour of flow control and congestion control techniques in packet switched networks. It is an Opensource Object Oriented, discrete event simulator. It is the second version of Network Simulator. NS-2 is one of the most commonly used simulators for network research. This work was started in the year and the first version was released in The latest version of NS-2 is NS In NS-2 the control path implementation is separated from data path implementation.
NS-2b is fully equipped with protocols, models, algorithms and accessory tools. It was developed by Andras Varga from Technical University of Budapest with some intermittent contributors. It was licensed under own Academic Public License.
The development work was started in the year It can be used in several problem domains like modeling of communication networks, queuing networks, multiprocessors and other distributed hardware systems, protocol modeling, hardware architectures validation and performance evaluation of complex software system.
Graphical animating user interfaces are useful for demonstration and also for debugging purposes. Command-line user interfaces are good for batch execution. Simulator, user interfaces and tools are highly portable. Supports parallel distributed simulation. It is a library based parallel Simulator. It provides a scalable simulation environment for wireless networks. It is the combination of library based sequential and parallel discrete event simulator.
It comes with rich set of models and this simulation tool can scale up to thousands of nodes. The highly modular design of this tool makes it easy to extend and modify the basic functionalities. The ability to scale up and definition of standard APIs for modular protocol stack opens the possibility to flexibly investigate the effect of multiple models at different levels of detail. Analysis and visualization tools are basic but it is sufficient for general studies.
GloMoSim is not under active development. Supports large scale networks with thousands of nodes. QualNet QualNet Network Simulator Software, provides comprehensive environment for designing protocols, creating and animating network scenarios, and analyzing their performance.
It is the commercial version of GloMoSim. Mainly it is mainly used for large heterogeneous networks. It is a scalable simulator with high fidelity network models.
The first version was released in the year QualNet has many additional features compared to GloMoSim. The latest release was QualNet 7 in Oct, QualNet has large number of models and protocols for both wired and wireless networks. It has extensive documentation and technical support.
In the network research area, it is very costly to deploy a complete test bed containing multiple networked computers, routers and data links to validate and verify a certain network protocol or a specific network algorithm. The network simulators in these circumstances save a lot of money and time in accomplishing this task. Network simulators are also particularly useful in allowing the network designers to test new networking protocols or to change the existing protocols in a controlled and reproducible manner. Computer assisted simulation can model hypothetical and real-life objects or activities on a computer so that it can be studied to see how the system function. Different variables can be used to predict the behavior of the system. Computer simulation can be used to assist the modeling and analysis in many natural systems. That is why the network simulations always require open platforms which should be scalable enough to include different efforts and different packages in the simulations of the whole network.
mobile Internet, cloud computing, big data, software-defined networks, and 5G. In addition, the Chapter 3 introduces the basic IoT simulation model using. OPNET. OPNET and the functions created by the PDF editor (probability distribution.
A wireless sensor network consists of spatially distributed autonomous sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants. The development of wireless sensor networks was motivated by military applications such as battlefield surveillance.
Computer networks have become essential to the survival of businesses, organizations, and educational institutions, as the number of network users, services, and applications has increased alongside advancements in information technology. Given this, efforts have been put forward by researchers, designers, managers, analysts, and professionals to optimize network performance and satisfy the varied groups that have an interest in network design and implementation. Simulation in Computer Network Design and Modeling: Use and Analysis reviews methodologies in computer network simulation and modeling, illustrates the benefits of simulation in computer networks design, modeling, and analysis, and identifies the main issues that face efficient and effective computer network simulation. This reference will inform the work and research of academics, post-graduate students, developers, network designers, network analysts, telecommunication system designers, and others who are interested in using simulation in computer network design and modeling. The application of computer simulation can potentially improve the quality and effectiveness of the network design. This book is recommended for researchers working in the area of computer network simulations, and for teachers, trainers, and professionals who simulate the performance analysis of computer networks and run applications over computer networks. Overall, the book will certainly prove useful to researchers and professionals working in the area of computer networks and their analysis.
In the network research area, it is very costly to deploy a complete test bed containing multiple networked computers, routers and data links to validate and verify a certain network protocol or a specific network algorithm. The network simulators in these circumstances save a lot of money and time in accomplishing this task. Network simulators are also particularly useful in allowing the network designers to test new networking protocols or to change the existing protocols in a controlled and reproducible manner. In this paper, we present a comprehensive survey on current network simulators. We introduce their main features, consider their advantages and disadvantages, and discuss the current and future developments.
Based on this technology, simulated IoT and practical cloud are seamlessly connected with each other. He serves as editor or associate editor for a broad range of journals, and has more than paper publications, including over SCI papers, 80 IEEE papers, 23 ESI highly cited papers, nine ESI hot papers and eight books to his credit. His research focuses on cyber physical systems, IoT sensing, 5G networks, mobile cloud computing, body area networks, emotion communications and robotics, etc. Yiming Miao received her B. Currently, she is a Ph.
and applied to guarantee high-quality simulation models. Typically professionals with interest in computer networks, wireless networks, and per- formance are free to write their simulations as either C++ main() programs or Python programs. OPNET Modeler is a state-of-the-art network modeling and simulating tool.
Стратмор подавил желание встать с ней. Он многое знал об искусстве ведения переговоров: тот, кто обладает властью, должен спокойно сидеть и не вскакивать с места. Он надеялся, что она сядет. Но она этого не сделала.
Я знаю, что ты о нем думаешь. - Это не имеет никакого отношения к Попрыгунчику, - резко парировала. Вот это чистая правда, - подумал Джабба. - Послушай, Мидж, к Стратмору я не отношусь ни плохо ни хорошо. Ну, понимаешь, он криптограф.
В XVI11 веке некий английский купец приобрел у севильской церкви три десятка бушелей апельсинов и, привезя их в Лондон, обнаружил, что фрукты горькие и несъедобные. Он попытался сделать из апельсиновой кожуры джем, но чтобы можно было взять его в рот, в него пришлось добавить огромное количество сахара.
Да. Есть ли в Севилье такое место, где тусуются панки. - No lo se, senor.
Это Цифровая крепость. - Вот как? - снисходительно произнес Стратмор холодным как лед голосом. - Значит, тебе известно про Цифровую крепость. А я-то думал, что ты будешь это отрицать. - Подите к черту.
Стратмор вяло махнул рукой в сторону монитора. Сьюзан посмотрела на экран и перевела взгляд на диалоговое окно. В самом низу она увидела слова: РАССКАЖИТЕ МИРУ О ТРАНСТЕКСТЕ СЕЙЧАС ВАС МОЖЕТ СПАСТИ ТОЛЬКО ПРАВДА Сьюзан похолодела.
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