QoS Scheduler/Shaper for Optical Coarse Packet Switching IP-Over-WDM Networks

Yuang, M.C.; Tien, Po-Lung; Shih, Jian-Yu; Chen, A.

doi:10.1109/jsac.2004.833837

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…In the control plane, an FPGA-based traffic generator produced four traffic channels using two different labels (fibers 1 and 2) and two priorities (H and L), respectively. For each channel, the traffic arrivals were generated following an Interrupted Bernoulli Process [7] characterized by two parameters (α,β), where α (β) corresponds to the probability of the state change per slot from "ON" ("OFF") to "OFF"("ON"). While the first-channel traffic was used to trigger the 10 Gb/s data pattern generator to actually pump out data packets, the remaining three channel's information was passed to CSC to virtually emulate the environment with desired traffic and loads.…”

Section: Experimentation and Resultsmentioning

confidence: 99%

A 10G QoS-enabled optical packet-switching system: technology and experimentation

et al. 2006

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The paper presents the architecture and experimentation of a 10-Gb/s QoS-enabled almost-all-optical packet switching system (QOPS) for metro WDM networks. By applying cluster-based wavelength sharing and downsized single-staged optical buffers, QOPS is featured by its highly scalable and cost-effective design. In this paper, we first introduce the switch architecture, system operation, and the key techniques. We describe the in-band header/payload modulation and optical label swapping that is suitable for high-speed optical packet switching. We also present the design of the highly efficient Four-Wave Mixing wavelength converters for packet preemption. We then present an adaptive bifurcated routing (ABR) that directs same-connection packets to different switch clusters according to optimal bifurcation probabilities. Experimental and simulation results demonstrate that QOPS can achieve superior packet-loss performance, QoS differentiation, and minimize traffic blocking probability.

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Section: Experimentation and Resultsmentioning

confidence: 99%

A 10G QoS-enabled optical packet-switching system: technology and experimentation

et al. 2006

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“…2. Weighting schemes have significant impact on the decisions made by arbitration and scheduling mechanism, Various weight functions, including iterative longest packet queue first (LPF), shortest packet queue first (SPF) and oldest packet queue first (OPF) have been presented in the literature [10][11][12][13][14][15][16]. However, LPF strategy can efficiently and delay restrains the queue length and packet delay, but is known as achieve 100% throughput by the cost of speedup OPS switch.…”

Section: Node Scheduling For Asynchronous Opsmentioning

confidence: 99%

“…These mechanisms control the service time and service order of the packet to provide delay guarantee and packet loss ratio. An ideal scheduling algorithm should be a fair, computationally simple to allow implementation on high-speed optical networks [10][11]. The lack of the optical memory leads to a higher packet loss ration when resource contentions occur at the intermediate optical OPS nodes.…”

Section: Introductionmentioning

confidence: 99%

Weighted scheduling based on queue length and delay for AOPS

2007

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Packet scheduling plays an important role in the asynchronous optical switched networks for node performance. A weighted scheduling algorithm based on the queue length associated with waiting delay was proposed to solve the packet starvation of queue length weighted scheduling for the length variable OPS. The contention is resolved either in wavelength domain by limited range wavelength converters and in time domain by fiber delay lines. The work has contributed with a very powerful scheduling mechanism which reduces resource contention at the asynchronous OPS core nodes and guarantees a reasonable packet delay thanks to its weighted scheduling algorithm based on queue length and waiting delay for variable length OPS network. The scheduler calculates every input ports with N×K virtual output queue (VOQ) weight and schedules the maximal weight queue packets to available output channel. The analysis and simulation results show that the proposed scheduling has high throughput and low packet loss ratio.

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“…An ideal scheduling algorithm should be a fair, computationally simple to allow implementation on high-speed optical networks [7][8]. The scheduling mechanisms can guarantee the packet delay and packet loss ratio by controlling packet service time and service order.…”

Section: Introductionmentioning

confidence: 99%