Predicting FDDI computer network performance using a calibrated software simulation model

2005 ◽  
Author(s):  
S. Dempsey ◽  
W.J. Reilly ◽  
M. Teter ◽  
L. Weinberg
Keyword(s):  
Simulation Model ◽  
Network Performance ◽  
Computer Network ◽  
Software Simulation

scholarly journals RESEARCH OF SDN NETWORK PERFORMANCE PARAMETERS USING MININET NETWORK EMULATOR

2021 ◽  
pp. 24-32
Author(s):  
Oleksandr Romanov ◽  
Ivan Saychenko ◽  
Anton Marinov ◽  
Serhii Skolets
Keyword(s):  
Simulation Model ◽  
Performance Indicators ◽  
Network Performance ◽  
Complex Structure ◽  
Science Research ◽  
Simulation Modelling ◽  
Network Equipment ◽  
Network Emulator ◽  
Network Technologies ◽  
Routing Tables

Background. The implementation of the new modern services on existing networks requires replacement or modernization of the old equipment. This negatively affects the efficiency of providing users with new types of services and their cost. Therefore, the issues/tasks of implementing SDN technology in the construction of networks are in the center of attention of representatives of science-research organizations and telecom operators. SDN networks have the advantages of flexible scaling of the system without replacing existing server and network equipment, eliminating operator dependence on specific vendor solutions, and rapid implementation of the new network technologies and services. To determine the numerical values of indicators of the functioning of SDN networks and check their compliance with the requirements, it is proposed to use in working process simulation modelling. For these goals, the Open Networking Foundation consortium developed the Mininet network emulator, the elements of that are published publicly. The formation of the simulation model and the procedure for determining the performance indicators of the SDN network that uses Mininet has a number of features that are considered in the work. Objective. The purpose of the article is to build a simulation model based on the Mininet network emulator and to determine the performance indicators of SDN networks of various structures/topologies. Methods. Creation of a SDN network segment for testing process of its functioning in the overload mode of various communication routes. Results. The Mininet network emulator allows simulating SDN networks of a rather complex structure, change the performance of network branches and the amount of load in communication routes, to create a network-wide overload mode. During the simulation, it is possible to determine a number of indicators of network performance, such as the RTT (Round Trip Time) parameter for each route of communication, the bandwidth of branches and routes of communication, the amount of delay on network elements, loading of OpenFlow Switch ports/interfaces, network elements with the highest delay, the number of served and lost packets. Conclusions. Use of the Mininet network emulator is a fairly convenient tool for determining the performance indicators of SDN networks. However, there are also some problems. First of all, setting up the system's operability requires writing programs to ensure the interaction among standard elements from the Mininet library. Secondone, is when congestion occurs in the communication routes, the Floodlight Controller does not automatically balance traffic along the work-around route. This task has to be solved manually by making changes to the OpenFlow Switch routing tables. Keywords: Software Defined Networking; SDN; Mininet; OpenFlow; Floodlight Controller; OpenFlowSwitch; NFV; virtualization.

scholarly journals Traffic Modeling Using Raw Packet Generator on Corporate Computer Network

2018 ◽  
pp. 1-10
Author(s):  
A. Danladi ◽  
G. P. Vasira
Keyword(s):  
Network Performance ◽  
Pareto Distribution ◽  
Computer Network ◽  
Fractal Dimensions ◽  
Traffic Modeling ◽  
Hurst Index ◽  
Absolute Moment ◽  
Corporate Networks ◽  
Statistical Complexity ◽  
Network Engineering

Fractal dimension is mathematically defined as a ratio of statistical complexity of network traffic; its significant manifestation can affect the network performance. In this work, two models of corporate computer networks have been developed using optimized network engineering tool (OPNET) technology. Raw packet generator (RPG) traffic was imposed on the corporate networks and modeled using H = 0.7 and D = 1.3, under the influence of Pareto distribution. Autocorrelation function and power law were used to confirm the presence of fractal traffic on the networks. Average Hurst index (H) of 50 and 100 workstations were estimated using aggregate of variance, absolute moment, periodogram and R/S methods as 0.627, 0.608 and its corresponding fractal dimensions (D) were obtained as 1.371 and 1.391 respectively. These results obtained mean, there is a manifestation of fractal traffic and delay is minimised on the network.  

TCP/IP Protocol-Based Model for Increasing the Efficiency of Data Transfer in Computer Networks

2013 ◽  
pp. 116-134
Author(s):  
S.N. John ◽  
A.A. Anoprienko ◽  
C.U. Ndujiuba
Keyword(s):  
Simulation Model ◽  
Computer Networks ◽  
Computer Network ◽  
Data Transfer ◽  
Basic Method ◽  
Imitation Model ◽  
Corporate Networks ◽  
Network Applications ◽  
Modern Computer ◽  
Model And Simulation

This chapter provides solutions for increasing the efficiency of data transfer in modern computer network applications and computing network environments based on the TCP/IP protocol suite. In this work, an imitation model and simulation was used as the basic method in the research. A simulation model was developed for designing and analyzing the computer networks based on TCP/IP protocols suite which fully allows the exact features in realizing the protocols and their impact on increasing the efficiency of data transfer in local and corporate networks. The method of increasing efficiency in the performance of computer networks was offered, based on the TCP/IP protocols by perfection of the modes of data transfer in them. This allows an increased efficient usage of computer networks and network applications without additional expenditure on infrastructure of the network. Practically, the results obtained from this research enable significant increase in the performance efficiency of data transfer in the computer networks environment. An example is the “Donetsk National Technical University” network.

scholarly journals A Remote Testbed System for Mobile Ad-hoc/Sensor Networks

2015 ◽  
Vol 11 (9) ◽  
pp. 22
Author(s):  
Jun Yin ◽  
Yuwang Yang ◽  
Xiayun Hu ◽  
Yanxiang Yin
Keyword(s):  
Sensor Networks ◽  
Packet Loss ◽  
High Speed ◽  
Network Performance ◽  
Ad Hoc ◽  
Main Idea ◽  
Software Simulation ◽  
Rotary Platform ◽  
Mobile Ad Hoc ◽  
Ad Hoc Sensor Networks

Nodes in a mobile ad-hoc/sensor networks (MANET) can move at any speed and direction independently. Thus, it's difficult to design a testbed system for network working under such circumstance. Different with traditional software simulation or vehicle-loaded methods, a remote network performance testbed system is proposed in this paper. The main idea of our proposed system is using the rotary motion to create such velocity-changing context. We designed and realized two high speed rotary turntable platforms. Nodes can be deployed on the rotary platform during test, thus it can movement at a speed upto 168 km/h in our testbed system. The operator can remotely monitor the test and receive the testing results simultaneously. Shown by the experiments, the approach is simple, efficient and reliable. In addition, the reason of network packet loss in our testbed is also analysed and tested in this research.

scholarly journals Preliminary Hybrid Modeling of the Panama Canal: Operations and Salinity Diffusion

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Luis Rabelo ◽  
Mario Marin ◽  
Petros Xanthopoulos ◽  
Carlos Arellano Lennox ◽  
Pedro Coiduras ◽  
...  
Keyword(s):  
Simulation Model ◽  
Discrete Event ◽  
Panama Canal ◽  
Simulation Environment ◽  
Operational Model ◽  
Software Simulation ◽  
Continuous Simulation ◽  
Event Simulation ◽  
Discrete Event Simulation Model ◽  
Effective Integration

This paper deals with the initial modeling of water salinity and its diffusion into the lakes during lock operation on the Panama Canal. A hybrid operational model was implemented using the AnyLogic software simulation environment. This was accomplished by generating an operational discrete-event simulation model and a continuous simulation model based on differential equations, which modeled the salinity diffusion in the lakes. This paper presents that unique application and includes the effective integration of lock operations and its impact on the environment.

Travel time estimation in urban networks using limited probes data

2011 ◽  
Vol 38 (3) ◽  
pp. 305-318 ◽  
Author(s):  
Mohamed El Esawey ◽  
Tarek Sayed
Keyword(s):  
Simulation Model ◽  
Travel Time ◽  
Network Performance ◽  
Time Estimation ◽  
Performance Measure ◽  
Estimation Accuracy ◽  
Travel Time Estimation ◽  
Travel Times ◽  
Time Data ◽  
Travel Time Data

Travel time is a simple and robust network performance measure that is well understood by the public. However, travel time data collection can be costly especially if the analysis area is large. This research proposes a solution to the problem of limited network sensor coverage caused by insufficient sample size of probe vehicles or inadequate numbers of fixed sensors. Within a homogeneous road network, nearby links of similar character are exposed to comparable traffic conditions, and therefore, their travel times are likely to be positively correlated. This correlation can be useful in developing travel time relationships between nearby links so that if data becomes available on a subset of these links, travel times of their neighbours can be estimated. A methodology is proposed to estimate link travel times using available data from neighbouring links. To test the proposed methodology, a case study was undertaken using a VISSIM micro-simulation model of downtown Vancouver. The simulation model was calibrated and validated using field traffic volumes and travel time data. Neighbour links travel time estimation accuracy was assessed using different error measurements and the results were satisfactory. Overall, the results of this research demonstrate the feasibility of using neighbour links data as an additional source of information to estimate travel time, especially in case of limited coverage.

scholarly journals SIMULATION SYSTEM OPTIMIZE THE TIME OF PROCESS

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Dyah Lintang Trenggonowati
Keyword(s):  
Simulation Model ◽  
Simulation System ◽  
Software Simulation ◽  
Packaging Process ◽  
The Third ◽  
Design Alternatives ◽  
Time Optimal ◽  
Simulation Results ◽  
A Company

<em>PT. LTX is a company engaged in manufacturing that produce tin plate coil form. Coil packaging process needs to be done before it is sent to the customer. In the process of packaging the coil is found on the machine appender bottleneck causing measurement stations of diameter and wrapping coil to be delayed which makes the time coil packaging is not optimal. This study aims to determine the simulation model of the existing coil packaging process, determining the proposed improvements to optimize the timing of coil packaging process, as well as find out the time optimal coil packaging process. This study uses a software simulation with ProModel 7.5. ProModel simulation results showed that the average time coil packaging process for 657.81 hours per month, so that made three design alternatives and the best improvement is the third alternative with the addition of resources such as forklifts and additional mounting stations crown that yield an average of 315.296 hours per month.</em>

scholarly journals Estimation of the ABW for Mobile Broadband over SDN using SFC-Constrained Shortest Path Algorithm

2019 ◽  
Vol 9 (1) ◽  
pp. 4282-4286
Keyword(s):  
Network Performance ◽  
Computer Network ◽  
Convergence Time ◽  
Software Defined Network ◽  
Bandwidth Utilization ◽  
Mobile Broadband ◽  
Novel Approach ◽  
Shortest Distance ◽  
Wide Range ◽  
Network Transformation

Software-Defined Networking (SDN) is an evolving algorithm which is depended upon the computer network transformation. In SDN, Bandwidth Utilization is a critical aspect to enhance network performance. To obtain the accessible bandwidth for the Mobile Broadband over SDN and in sequence enhance the accessible Mobile Broadband is the main objective. A significant characteristic is ABW (ABW), having a robust influence on a wide range of applications. However, this metric is very complex to estimate using traditional or conventional methodologies. The Traditional Bandwidth Estimation Technique has limited accuracy along with huge convergence time. The Estimation Time cannot be predicted as it depends on the existence of appropriate traffic produced through any thirdparty applications. 50% of Systematic Errors are not uncommon. In order to overcome the above-mentioned issues, in this paper, a novel approach is introduced for the estimation of ABW over SDN using three different scenarios. In which, SFC constraint shortest distance algorithm is employed for solving the classical max-flow issue that occurs in multiple scenarios while evaluating the ABW. The experiment result is carried out using Mininet testbed for network emulation and Floodlight as an SDN controller. Some of the interesting cases are considered, and the ABW is measured for the proposed software-defined network and compared with the existing traditional network and existing software-defined network

scholarly journals Computer Network Simulation of Firewall and VoIP Performance Monitoring

2018 ◽  
Vol 14 (09) ◽  
pp. 4
Author(s):  
Ammar O. Barznji ◽  
Tarik A. Rashid ◽  
Nawzad K. Al-Salihi
Keyword(s):  
Network Performance ◽  
Performance Monitoring ◽  
Computer Network ◽  
Data Transfer ◽  
Global Changes ◽  
Academic Administration ◽  
High Data ◽  
Security Issues ◽  
Simulated Network ◽  
The University

<p class="0abstract">Fast growing in communication technology has influenced global changes and challenges appear in the field of network security issues. Security solutions must be efficient and operate in a way to deal with threats, reject and stop the network intruders and Trojans. The simulated network of Salahaddin university new campus is planned to build on an area of (3000X3000) meter square. The network consists of many main and secondary devices. The network is mainly consisted of one core switch that provides a very high data transfer through connecting all the collected positions by a variety of cable medias to the entire network switches which are installed in each college location. The department of academic administration (presidency) of the university design is similar to the network designed in each college. The mentioned switch obtains the services from a router that isolates the network from the cloud which supports the services of internet to the network. The firewall is connected to the switch that connects the main server and cloud together. This paper focuses on undertaking a simulation to analyze and examine the performance of the whole network when two scenarios are implemented, the first is if firewall devices is used, the second is when firewall is not used, since the project of building Salahaddin University new campus is at the initial stage, therefore, the researchers think that, it is very important to figure out the drawbacks and deadlocks of using firewall upon each branch of the network and overall network performance before the submitting the final networks design that going to be implemented and installed, because this will indicate many differences on the construction, for example, the network panels ways, the cable collecting locations, network channels and many other device fixing things depending on the media types in addition of the demand of future expansion capabilities. The results show that the using or adding of firewall device to the university campus computer network, will improve the overall network performance though increasing the data stream on many network sections and sectors, also better results are obtained.</p>

Sign in / Sign up

Export Citation Format

Share Document