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Statistical Multiplexing of SelfSimilar Video Streams: Simulation Study and Performance Results
 Resultsâ€ť, Proceedings of the Sixth International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems,1998
, 1998
"... Achieving statistical gains when multiplexing video streams, as in a videoondemand (VOD) scenario, is difficult because of the stringent QOS demands and the selfsimilar nature of the traffic. This paper explores, through empirical simulation, the QOS, network utilization, and statistical character ..."
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Cited by 11 (1 self)
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Achieving statistical gains when multiplexing video streams, as in a videoondemand (VOD) scenario, is difficult because of the stringent QOS demands and the selfsimilar nature of the traffic. This paper explores, through empirical simulation, the QOS, network utilization, and statistical characteristics of the aggregate traffic resulting from multiple independent MPEG video streams. In addition, the simulation results are compared against several recentlyderived theoretical results for selfsimilar network traffic. Three main results are evident from our experiments. First, moderate statistical multiplexing gain can be achieved when multiplexing multiple selfsimilar streams. Second, video multiplexing is extremely sensitive to traffic phasing effects and to heavytailed frame size distributions. Finally, the theoretical approach considered (Norros effective bandwidth formulation) appears promising but requires finetuning to be practical for call admission and network dimensioning...
Traffic Modeling In The ATMTN Telesim Project: Design, Implementation, And Performance Evaluation
, 1995
"... The purpose of this paper is to provide an overview of the traffic models that have been designed and built for the ATMTN TeleSim Project. A brief description of each of the three traffic models (an MPEG compressed video model, an aggregate Ethernet LAN traffic model, and an Internet mosaic session ..."
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Cited by 10 (0 self)
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The purpose of this paper is to provide an overview of the traffic models that have been designed and built for the ATMTN TeleSim Project. A brief description of each of the three traffic models (an MPEG compressed video model, an aggregate Ethernet LAN traffic model, and an Internet mosaic session model) is presented, including the purpose, the design methodology, and the parameters for each model. All three models have been implemented in SimKit, a C ++ based simulation interface built on top of Shared Memory TimeWarp (SMTW), which provides an environment for efficient parallel simulation. Preliminary performance results for the sequential implementations of the three traffic models are now available, and are reported in this paper. 1 INTRODUCTION Workload modeling is a vital component of any simulation study (Jain 1991). Outputs from a simulation model are highly dependent on the inputs provided to the model, and without realistic input workload models, the simulation results ...
Effective Bandwidth Of SelfSimilar Traffic Sources: Theoretical And Simulation Results
 Proceedings of the IASTED Conference on Applied Modeling and Simulation (AMS'97
, 1997
"... This paper studies the effective bandwidth required when multiple selfsimilar (i.e., long range dependent) traffic sources are multiplexed together in a network. In particular, an ATM network simulation tool is used to assess the accuracy of a theoretical effective bandwidth formula developed by Il ..."
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Cited by 7 (4 self)
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This paper studies the effective bandwidth required when multiple selfsimilar (i.e., long range dependent) traffic sources are multiplexed together in a network. In particular, an ATM network simulation tool is used to assess the accuracy of a theoretical effective bandwidth formula developed by Ilkka Norros for selfsimilar traffic. Synthetic traffic models with controllable workload parameters are used in the study, using a onefactoratatime experimental design. In general, the simulation results show good qualitative and quantitative agreement between the effective bandwidths predicted by the formula and by the ATM network simulator, provided that the number of multiplexed sources and the switch buffer size are not too small. Where the results are in good agreement, the formula tends to err on the "safe side", thus making the theoretical formula useful for call admission control and network dimensioning in an ATM network. Keywords: Computer networks, telecommunication systems, ...
WaveletBased Network Traffic Modeling
, 2000
"... Ever since its birth, networking has experienced phenomenal growth. This phenomenal growth in terms of traffic volume, bandwidth requirements, network topologies and protocols, medium of communication, and network applications, is constantly changing the nature of network traffic, thus motivating th ..."
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Cited by 2 (0 self)
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Ever since its birth, networking has experienced phenomenal growth. This phenomenal growth in terms of traffic volume, bandwidth requirements, network topologies and protocols, medium of communication, and network applications, is constantly changing the nature of network traffic, thus motivating the need for flexible and efficient mathematical models to describe network traffic. Some early traffic models assumed that network packet arrival process was Poisson. Later, the selfsimilar or monofractal nature of network traffic was discovered and to capture this long range dependence nature, the Norros traffic model was proposed. Recently, multifractal characteristics of network traffic have been discovered and waveletbased models have been proposed to capture these characteristics. Before adopting wavelet models, their strengths and weaknesses have to be studied. The wavelet models require more parameters (2 + log 2 N parameters, where N is the number of data points in the modeled trace) than the Norros traffic mo...
Statistical Multiplexing of SelfSimilar Traffic: Theoretical and Simulation Results
, 1997
"... This paper studies the effective bandwidth required when multiple selfsimilar (i.e., long range dependent) traffic sources are statistically multiplexed together in a network. In particular, a theoretical effective bandwidth formula developed by Ilkka Norros [17] is used as the basis for deriving a ..."
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Cited by 2 (0 self)
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This paper studies the effective bandwidth required when multiple selfsimilar (i.e., long range dependent) traffic sources are statistically multiplexed together in a network. In particular, a theoretical effective bandwidth formula developed by Ilkka Norros [17] is used as the basis for deriving additional theoretical results for selfsimilar traffic. An ATM network simulator is then used to assess the accuracy of the theoretical results. In general, the simulation results show good qualitative and quantitative agreement with the effective bandwidths predicted by the formula.
Parallel Simulation Of ATM Networks: Case Study And Lessons Learned
, 1998
"... This paper summarizes our experiences in developing and using a celllevel ATM network simulator called ATMTN. The ATMTN simulator was developed as part of TeleSim, a collaborative research project aimed at developing high performance parallel simulation tools for the design and analysis of broadb ..."
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This paper summarizes our experiences in developing and using a celllevel ATM network simulator called ATMTN. The ATMTN simulator was developed as part of TeleSim, a collaborative research project aimed at developing high performance parallel simulation tools for the design and analysis of broadband ATM networks. The ATMTN simulator provides the fundamental platform for ongoing research in two areas: parallel simulation performance (e.g., optimistic synchronization, partitioning, dynamic load balancing) and ATM network performance (e.g., traffic modeling, ATM switch design, ABR traffic control). Our experiences with the simulator to date have been largely positive. On the parallel simulation front, we have found that ATM network simulation is a promising application domain for parallel simulationtechniques, though there are significant technical challenges to overcome regarding event granularity, simulation partitioning, scheduling, and load balancing. On the network performance f...
Characteristics of Multiplexed Variable Bit Rate Video Sources
"... Multimedia applications will play a crucial role in future highspeed networks. Despite improvements in network switching and transmission capacity, the anticipated volume of multimedia traffic will remain a challenge, and any results which characterize multimedia data streams will be useful in under ..."
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Multimedia applications will play a crucial role in future highspeed networks. Despite improvements in network switching and transmission capacity, the anticipated volume of multimedia traffic will remain a challenge, and any results which characterize multimedia data streams will be useful in understanding how to improve their distribution over digital networks. Clarification of the statistical characteristics of multimedia traffic, especially video traffic, is therefore of great significance. Here we present a statistical analysis of one hour long sample of the aggregated traffic of three synthetic MPEG video sources. The sample was obtained from a simple network model running on the ATMTN simulator, which was developed by the Western University Research Consortium on High Performance Computing and Networking (WurcNet) TeleSim Project. Existing results have shown that single video traffic is selfsimilar. But the complexity of selfsimilar processes makes difficult the theoretical a...