Photonic packet switches: architectures and experimental implementations

Blumenthal, D.J.; Prucnal, Paul R.; Sauer, J.R.

doi:10.1109/5.333744

Cited by 206 publications

(74 citation statements)

References 45 publications

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“…Much research has been accomplished in designing and implementing OPS nodes [4]- [6]. The recent advent of semiconductor optical amplifiers (SOAs) as commercially available wide bandwidth amplifying switching elements has enabled new opportunities for implementation of large-scale photonic switching systems [2], [3].…”

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confidence: 99%

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Ultra-low latency optical packet switching node

Small

Shacham

Bergman

2005

IEEE Photon. Technol. Lett.

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Abstract-A photonic packet switching node is introduced, and its routing latency is shown to be 15.3 ns. The power penalty of the node at a bit-error rate (BER) of 10 9 is confirmed to be approximately 0.2 dB across 33 nm of the -band for 10-Gb/s payload wavelengths. Moreover, multiple-wavelength packets containing 16 payload wavelengths can be switched while maintaining BERs of 10 12 or better.Index Terms-Interconnection networks, packet switching, photonic switching systems, wavelength-division multiplexing (WDM).

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confidence: 99%

“…Optical packet switching (OPS) fabrics offer a potentially viable solution to this requirement as fiber-optic components are capable of carrying many terabits per second of encoded optical data while maintaining near speed-of-light limited transit latencies [2], [3]. Much research has been accomplished in designing and implementing OPS nodes [4]- [6].…”

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confidence: 99%

Ultra-low latency optical packet switching node

Small

Shacham

Bergman

2005

IEEE Photon. Technol. Lett.

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“…Packets fro m all the inputs use WDM technology to share the loop buffer [3] . The nu mber of buffer wavelengths (size of memo ry) depends on the desired traffic throughput, packet loss probability, various component parameters and size of the switch [10] .…”

Section: Related Work and Architecture Descriptionmentioning

confidence: 99%

Performance Evaluation of the Loop Buffer Switch under Prioritized Traffic

Singh¹,

Srivastava²

2013

IJITCS

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Abstract-In this paper, optical loop buffer based architecture is discussed; with its advantages over other architectures. In general the performance of the switch is measured at physical and network layer. The physical layer analysis deals with power budget analysis , however, at the network layer; the performance is measured in terms of packet loss probability and average delay. To obtain more realistic performance at the network layer the QoS parameters need to be included. In this paper, a QoS parameter which is known as priority of the inco ming packets is included and corresponding results are presented, and it has been found that even at the load of 0.7, packet loss probabilities on the order of 10 -5 can be achieved.

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“…Optical packet switching [10]- [16] allows optical packets from different sources to share the wavelengths, achieving statistical multiplexing performance. However, optical packet switching technology is not mature enough to provide a viable solution.…”

Section: B Optical Packet Switchingmentioning

confidence: 99%

Optimal Burst Scheduling in Optical Burst Switched Networks

Chen

Turner

2007

J. Lightwave Technol.

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Abstract-Optical burst switching (OBS) is an emerging technology that allows variable size data bursts to be transported directly over dense wavelength division multiplexing links. In order to make OBS a viable solution, the burst-scheduling algorithms need to be able to utilize the available wavelengths efficiently, while being able to operate fast enough to keep up with the burst incoming rate. For example, for a 16-port OBS router with 64 wavelengths per link, each operating at 10 Gb/s, we need to process one burst request every 78 ns in order to support an average burst length of 100 kB. When implemented in hardware, the well-known horizon scheduler has O(1) runtime for a practical number of wavelengths. Unfortunately, horizon scheduling cannot utilize the voids created by previously scheduled bursts, resulting in low bandwidth utilization. To date, minimum starting void is the fastest scheduling algorithm that can schedule wavelengths efficiently. However, while its complexity is O(log m), it requires 10 log m memory accesses to schedule a single burst. This means that it can take up to several microseconds for each burst request, which is still too slow to make it a practical solution for OBS deployment. In this paper, we propose an optimal burst scheduler using constant time burst resequencing (CTBR), which has O(1) runtime. The proposed CTBR scheduler is able to produce optimal burst schedules while having processing speed comparable to the horizon scheduler. The algorithm is well suited to highperformance hardware implementation.Index Terms-Algorithm, optical burst switching (OBS), optical packet switching, scheduling, wavelength division multiplexing (WDM), wavelength routing.

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Photonic packet switches: architectures and experimental implementations

Cited by 206 publications

References 45 publications

Ultra-low latency optical packet switching node

Ultra-low latency optical packet switching node

Performance Evaluation of the Loop Buffer Switch under Prioritized Traffic

Optimal Burst Scheduling in Optical Burst Switched Networks

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