Adjusting the ns-2 Emulation Mode to a Live Network

Mahrenholz, Daniel; Ivanov, S.

doi:10.1007/3-540-27301-8_17

Cited by 16 publications

(18 citation statements)

References 8 publications

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“…To the best of our knowledge, the only earlier studies reported in literature on the performance of ns-2 extended for emulation was those performed by the authors of the extensions themselves [2] [3]. Their main focus lies on the accuracy of wireless ns-2 SimNets under real-time constraints, and they compare measurements from emulations and equivalent experiments with real networks.…”

Section: Discussionmentioning

confidence: 99%

“…Besides ns-2 there are numerous other distributed network emulators. Marenholz and Ivanov discuss in [3] and [2] how some of these emulators relate to their ns-2 extension. Furthermore, we recommend the surveys from Göktürk [15] and Kroppf [16] for a classification of the different emulators.…”

Section: Discussionmentioning

confidence: 99%

“…This explains why increasing the number of EmuPaths does not affect ns-2 throughput. How more complex SimNets are affected by increasing emulation experiment magnitudes, are out of the scope of this paper (see [2] and [3] for some investigations).…”

Section: At Certain Numbers Of Emupaths (For Instance 220mentioning

confidence: 99%

“…By attaching all TAP devices along with the physical network interface to such a switch, and by denoting the EmuHost as the gateway for all outbound traffic, we can achieve forwarding of packets between RWApps and ns-2 without a UDP tunnel. A similar approach was outlined in [2] for the SHE, but does not seem to be properly evaluated. This solution avoids the extra packet copying between kernel and user space, along with having the same properties as the above mentioned FIFO-queue.…”

Section: Summary and Improvement Proposalsmentioning

confidence: 99%

“…Extensions written by Mahrenholz and Ivanov [2] [3] have recently improved ns-2's emulation facility, allowing real-world applications (RWApps) to be connected to specific nodes within a simulated ns-2 network (SimNet). This approach has the advantage of possible reuse of existing network models developed and refined for ns-2 over the years.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

ns-2 Distributed Clients Emulation: Accuracy and Scalability

Kristiansen¹,

Plagemann²

2009

Proceedings of the Second International ICST Conference on Simulation Tools and Techniques

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ABSTRACTns-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 simulated network as perceived by the involved realworld applications. This paper presents results from a performance evaluation of the ns-2 emulation facility. Conducting emulation experiments of differing magnitudes, and under varying emulation environment set-ups, we unveil central types of scalability limitations and obtainable accuracy. We find throughput limits using high and low end computers, and a significant throughput decrease when increasing the number of involved real-world applications. We furthermore show how end-to-end delay increases both with traffic load and an increasing number of involved real-world applications. Moreover, during these conditions, we find that the system treats these applications increasingly unfair by distributing total throughput unevenly between them, and by imposing different amounts of end-to-end delay.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: At Certain Numbers Of Emupaths (For Instance 220mentioning

confidence: 99%

Section: Summary and Improvement Proposalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

ns-2 Distributed Clients Emulation: Accuracy and Scalability

Kristiansen¹,

Plagemann²

2009

Proceedings of the Second International ICST Conference on Simulation Tools and Techniques

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Simulating Mobile Ad-Hoc Networks in City Scenarios

Stepanov

Rothermel

2006

Lecture Notes in Computer Science

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Simulation tools are frequently used for performance evaluations of mobile ad-hoc networks. Currently the tools poorly support urban scenarios, since they do not take a spatial environment into account. In this paper, we describe a platform for the modeling of city scenarios. We extend ns-2 with corresponding mobility and wireless transmission models. By using its emulation facility, we integrate unmodified applications and real implementations of network protocols. We demonstrate the usefulness of the platform for performance evaluations by modeling a mobile application in a simulated environment of Stuttgart downtown. We show that it helps identifying application problems before deployment.

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TFD-Based Dynamic Resource Reservations for SD and HD Video Transmission Over a Multiservice Network

Chodorek¹,

Chodorek

2017

Human-Computer Systems Interaction

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Adjusting the ns-2 Emulation Mode to a Live Network

Cited by 16 publications

References 8 publications

ns-2 Distributed Clients Emulation: Accuracy and Scalability

ns-2 Distributed Clients Emulation: Accuracy and Scalability

Simulating Mobile Ad-Hoc Networks in City Scenarios

TFD-Based Dynamic Resource Reservations for SD and HD Video Transmission Over a Multiservice Network

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