A histogram-based model for video traffic behavior in an ATM multiplexer

Skelly, P.; Schwartz, M.; Dixit, Sudhir

doi:10.1109/90.251897

Cited by 165 publications

(66 citation statements)

References 13 publications

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“…Ryu and Elwalid [28] showed that short term correlations have dominant influence on the network performance under realistic scenarios of buffer sizes for real-time traffic. Based on these previous works we argue that the MMPP may be a practical model to derive approximate results for the queuing behavior of long range dependent traffic such as real-time VBR video, especially in the case of small buffer sizes [29].…”

Section: Model Descriptionmentioning

confidence: 99%

On the effects of the packet size distribution on FEC performance

2006

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For multimedia traffic like VBR video, knowledge of the average loss probability is not sufficient to determine the impact of loss on the perceived visual quality and on the possible ways of improving it, for example by forward error correction (FEC) and error concealment. In this paper we investigate how the packet size distribution affects the packet loss process, i.e. the probability of consecutive losses and the distribution of the number of packets lost in a block of packets and the related FEC performance. We present an exact mathematical model for the loss process of an MMPP + MMPP/E r /1/K queue and compare the results of the model to simulations performed with various other packet size distributions (PSDs), among others, the measured PSD from an Internet backbone. The results show that analytical models of the PSD matching the first three moments (mean,variance and skewness) of the empirical PSD can be used to evaluate the performance of FEC in real networks. We conclude that the exponential PSD, though it is not a worst case scenario, is a good approximation for the PSD of today's Internet to evaluate FEC performance. We also conclude that the packet size distribution affects the packet loss process and thus the efficiency of FEC mainly in access networks where a single multimedia stream might affect the multiplexing behavior. We evaluate how the PSD affects the accuracy of the widely used Gilbert model to calculate FEC performance and conclude that the Gilbert model can capture loss correlations better if the CoV of the PSD is high.

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Section: Model Descriptionmentioning

confidence: 99%

On the effects of the packet size distribution on FEC performance

2006

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“…The MMPP model has been shown to be effective in representing many types of multimedia traffic, including voice [23], MPEG video [24], and general data [25]. We apply the MMPP model for all the traffic flows in the system (note that the Poisson model is a special case of the MMPP model).…”

Section: Mmpp Trafficmentioning

confidence: 99%

Cross-Layer Optimization for Multimedia Transport over Multicode CDMA Networks

Chen

Chan

Leung

2011

IEEE Trans. on Mobile Comput.

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Abstract-Most previous work on code division multiple access (CDMA) considers the bit error ratio (BER) at the physical layer and the frame drop ratio (FDR) at the medium access control layer separately. However, a better system performance, e.g., in terms of a lower overall frame loss ratio (FLR), can be achieved if BER and FDR are jointly optimized. In this paper, we propose a cross-layer optimization scheme called traffic-adaptive scheme for multicode CDMA operating over a time division multiple access (TDMA) channel. Based on the traffic condition and buffer status, this scheme employs a Markov Decision Process (MDP) to determine the optimal value of the maximum number of simultaneous data frames that can be transmitted in each time slot of a TDMA frame so as to minimize the overall FLR of the system. To facilitate implementation, we also propose an approximation scheme named the rateadaptive scheme to reduce the computation cost. Simulation and analytical results show that both the traffic-adaptive scheme and rate-adaptive scheme can significantly reduce FLR, increase the system throughput, and optimize the packet access delay of the system. Furthermore, the rate-adaptive scheme can achieve a performance close to the traffic-adaptive scheme when the traffic load in the system is high.

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“…On average, an on-state lasts 10 frames and an off-state lasts 15 frames. The video traffic can be modeled by a Markov-modulated Poisson process (MMPP) [18]. Here, to be able to calculate the conditional rate distribution, we use a simplified MMPP model with four states.…”

Section: The Simulation Environmentmentioning

confidence: 99%

QoS-oriented packet scheduling for wireless multimedia CDMA communications

Huang

Zhuang

2004

IEEE Trans. on Mobile Comput.

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Abstract-In the third-generation (and beyond) wireless communication systems, there will be a mixture of different traffic classes, each having its own transmission rate characteristics and quality-of-service (QoS) requirements. In this paper, a QoS-oriented medium access control (MAC) protocol with fair packet loss sharing (FPLS) scheduling is proposed for wireless code-division multiple access (CDMA) communications. The QoS parameters under consideration are the transmission bit error rate (BER), packet loss, and delay requirements. The MAC protocol exploits both time-division and code-division statistical multiplexing. The BER requirements are guaranteed by properly arranging simultaneous packet transmissions and controlling their transmit power levels, whereas the packet loss and delay requirements are guaranteed by proper packet scheduling. The basic idea of FPLS is to schedule the transmission of multimedia packets in such a way that all the users have a fair share of packet loss according to their QoS requirements, which maximizes the number of the served users under the QoS constraints. Simulation results demonstrate effectiveness of the FPLS scheduler, in comparison with other previously proposed scheduling algorithms.

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A histogram-based model for video traffic behavior in an ATM multiplexer

Cited by 165 publications

References 13 publications

On the effects of the packet size distribution on FEC performance

On the effects of the packet size distribution on FEC performance

Cross-Layer Optimization for Multimedia Transport over Multicode CDMA Networks

QoS-oriented packet scheduling for wireless multimedia CDMA communications

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