Delay-line buffer modeling for asynchronous optical networks

Almeida, Raul C.; Pelegrini, Jefferson U.; Waldman, Hélio

doi:10.1117/12.533547

Cited by 10 publications

(19 citation statements)

References 2 publications

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“…However, increasing the buffer size is limited in practice because large buffers will increase the cost of FDLs. Nevertheless, because a switch fabric is assumed as non-blocking in the most cases, the numerical analysis of FDL buffers can be easily made in this architecture [15,18].…”

Section: Buffering Architecturementioning

confidence: 99%

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Service differentiation scheme in OBS networks

Lee¹,

Kim²,

Kang³

2007

Photon Netw Commun

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In order to achieve service differentiation, especially loss differentiation, in optical burst switching (OBS) networks, we propose a dynamic fiber delay line (FDL) partitioning algorithm, which divides FDLs into several groups over a feed-forward output buffering architecture. In the proposed scheme, a plurality of traffic classes and FDL groups can be considered, and each FDL group is assigned to traffic classes, so that the target loss probabilities of classes are guaranteed. Also, the optimal number of FDLs for each FDL group by the proposed algorithm is decided in Poisson traffic environments. The extensive simulation results validate the effectiveness of the proposed dynamic FDL partitioning algorithm for the loss differentiation in OBS networks.

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Section: Buffering Architecturementioning

confidence: 99%

“…Under the assumption that the arrival process is Poisson with rate λ and there are k FDLs, we can determine the loss probability of the FDLs as follows [18] …”

Section: Loss Probability Analysismentioning

confidence: 99%

Service differentiation scheme in OBS networks

Lee¹,

Kim²,

Kang³

2007

Photon Netw Commun

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“…The main proposal of this paper is to develop an exact analytical modeling for the delay-line buffer when the threshold mechanism is used for service differentiation in asynchronous optical networks. In the past years, some important studies have been concerned with modeling delay-line buffers in asynchronous optical packet-switched networks [14][15][16][17][18]. In [16,17], exact analytical models for the feed-forward delay-line buffer under the FIFO discipline have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…In the past years, some important studies have been concerned with modeling delay-line buffers in asynchronous optical packet-switched networks [14][15][16][17][18]. In [16,17], exact analytical models for the feed-forward delay-line buffer under the FIFO discipline have been proposed. The authors in [18] extended the analytical model proposed in [16] and provided an accurate analytical model for shared delay-line buffers.…”

Section: Introductionmentioning

confidence: 99%

“…In [16,17], exact analytical models for the feed-forward delay-line buffer under the FIFO discipline have been proposed. The authors in [18] extended the analytical model proposed in [16] and provided an accurate analytical model for shared delay-line buffers. In this paper, we extend the model proposed in [16] for considering the threshold mechanism in delay-line buffers.…”

Section: Introductionmentioning

confidence: 99%

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Analytical modeling for the threshold service differentiation mechanism in asynchronous optical buffers

et al. 2007

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͑Doc. ID 80006͒ With the emergence of different kinds of applications, service differentiation has become an important issue to be considered in current and future networks. We propose an exact analytical model for evaluating the performance of feed-forward delay-line buffers when the threshold mechanism is used for service differentiation in asynchronous optical packet-switched networks. The analytical model was derived assuming Poisson arrivals and any packet length distribution. Parameters such as buffer size, load, and others do not affect the accuracy of the model. In addition, it can use an arbitrary number of service-differentiated classes and traffic partitioning within them. To check the exactness of the model, we compared the buffer modeling with simulation results when exponential and uniform distributions are considered for the packet length. The analysis presented here shows that by using the threshold mechanism, it is possible to effectively differentiate the per class packet blocking probability.

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Performance of fiber delay‐line buffers in asynchronous packet‐based optical switching networks with wavelength conversion

Zhang

Wang

2014

Int J Communication

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SUMMARYA major challenge in asynchronous packet-based optical networks is packet contention, which occurs when two or more packets head to the same output at the same time. To resolve contention in the optical domain, two primary approaches are wavelength conversion and fiber delay line (FDL) buffering. In wavelength conversion, a contending packet can be converted from one wavelength to another in order to avoid conflict. In FDL buffering, contending packets can be delayed for a fixed amount of time. While the performance of wavelength conversion and FDL buffering has been evaluated extensively in synchronous networks with fixed-sized packets, in this paper, we study the performance of FDL buffers in asynchronous packet-based optical networks with wavelength conversion. An analytical model is proposed to evaluate the performance in terms of packet loss probability and average delay. Extensive simulation and analytical results show that, with appropriate settings, FDL buffers can perform much better in switches with wavelength conversion than in switches with no conversion.

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Delay-line buffer modeling for asynchronous optical networks

Cited by 10 publications

References 2 publications

Service differentiation scheme in OBS networks

Service differentiation scheme in OBS networks

Analytical modeling for the threshold service differentiation mechanism in asynchronous optical buffers

Performance of fiber delay‐line buffers in asynchronous packet‐based optical switching networks with wavelength conversion

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