Performance and node architecture of WDM multiple fiber ring networks

Nagatsu, Naohide; Watanabe, A.; Okamoto, Satoru; Sato, Ken

doi:10.1109/icc.1998.685148

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…In circuit-switched networks, it has been shown that with proper design, a single stage of small-sized switching boards can achieve rather good performance [20,25,26]. In fact, by slightly increasing the number of fibers per link, a single-stage design can even outperform the ideal, strictly non-blocking switch [20].…”

Section: Introductionmentioning

confidence: 99%

On the performance of different node configurations in multi-fiber optical packet-switched networks

Xiao

Ghafouri‐Shiraz

2006

Photon Netw Commun

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With the development of optical packet-switching (OPS) technologies, multi-fiber OPS networks will play an important role in the future data transmissions. In such networks, instead of constructing some extremely expensive node configurations with strictly non-blocking switching function, a more practical solution is multi-board switches that contain a number of small-sized switching boards. In this article, we have evaluated the performance of several different multi-board switches, based on the following two main objectives: (i) better understanding the effects of different connection schemes between switching boards and optical buffers and (ii) investigating possible schemes for achieving comparable performance to that of the ideal, strictly non-blocking switches. Extensive simulation results have shown that unlike circuit-switched networks, multi-board OPS cannot easily perform comparably to the strictly non-blocking switch by having slightly more fibers per link. Also, such a problem can be tackled by several different approaches. The most efficient one is to equip the switch with more buffers rather than to increase the switching-board size or to enhance the buffer sharing between different switching boards.

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Section: Introductionmentioning

confidence: 99%

On the performance of different node configurations in multi-fiber optical packet-switched networks

Xiao

Ghafouri‐Shiraz

2006

Photon Netw Commun

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“…• Distributed wavelength provisioning in multi-fiber networks. While it is wellknown that having multiple fibers in each link helps to significantly lower the impacts of the wavelength continuity constraint on centralized lightpath provisioning schemes [95][96][97][98] We will study the above topics in our future research. In the long-term future, quality of service (QoS) by distributed lightpath provisioning and integrated packetcircuit communications in WDM networks may be of our research interest.…”

Section: Summary Of Main Contributionsmentioning

confidence: 99%

Distributed wavelength provisioning in WDM optical networks

Liu¹

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First of all, I would like to thank my supervisor, Dr Xiao Gaoxi, for his continuous support, guidance and encouragement. I enjoy each discussion with him. He always shares his fruitful experiences and knowledge with me. During my study in Nanyang Technological University, Dr Xiao Gaoxi let me know how to do research, how to keep enthusiasm, dedication to excellence, and careful attention to details. I feel very proud to be given this opportunity to study under his supervision. Without his help, this thesis would not have been made.

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“…In circuit-switched networks, it has been shown that with proper designs, a single stage of small-sized switching boards can achieve rather good performance [118]- [120]. In fact, by slightly increasing the number of fibers per link, a single-stage design can even outperform the ideal, strictly non-blocking switch [120].…”

Section: Introductionmentioning

confidence: 99%

Contention resolutions in optical packet switches

Li¹

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This project studies the designing and evaluates the performance of optical packet switches (OPS) with a central focus on various contention resolution schemes. In this project, we propose and evaluate several cost-effective contention resolution solutions by exploring the time, wavelength, and space dimensions of wavelength division multiplexing (WDM) networks, respectively. Specifically, node configurations with both the shared fiber delay lines (FDLs) and the tunable wavelength converters (TWCs) are evaluated to reveal the cost-effective manner of installing and utilizing such contention resolution components. We then propose a node configuration with the fixed wavelength conversion (FWC) and show that it performs comparably to the much more expensive configuration with full-range tunable wavelength conversion (FTWC); and it outperforms the conventional limited wavelength conversion (LWC) solution as well. To explore the space dimension in multi-fiber links, we propose the multi-fiber optical packet switch (MOPS) scheme. Analytical and simulation results show that having multiple fibers per link significantly save the TWCs and FDLs needed to achieve satisfactory performance. It is also shown that by carefully configuring the switchingnode architecture, multi-board switches can achieve good performance at a much lower cost than that of the ideal, strictly non-blocking switch. Finally, we investigate the impacts of different traffic allocations to the packet-loss performance. We demonstrate that the balanced scheme, which evenly distribute traffic load in time and/or space dimensions as far as possible, leads to better performance. And we propose an algorithm to achieve the best performance subject to limited capacity of traffic load adjustment. vii

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Performance and node architecture of WDM multiple fiber ring networks

Cited by 7 publications

References 10 publications

On the performance of different node configurations in multi-fiber optical packet-switched networks

On the performance of different node configurations in multi-fiber optical packet-switched networks

Distributed wavelength provisioning in WDM optical networks

Contention resolutions in optical packet switches

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