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A positive–negative delayer for slotted OBS networks to enhance two-way signaling scheme

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Optical burst switching (OBS) is a promising technology for next-generation optical networks and slotted OBS is one of its improved versions. Contention between bursts is the main defect in OBS (as well as slotted OBS) networks. Different strategies are proposed to resolve contentions, such as using fiber delay line (FDL) to delay one of the conflicting bursts, or adopting two-way signaling scheme to gather states of links in advance. Unfortunately, the above two strategies cannot be used together, because FDL would deviate a burst from its planned trajectory, which would eliminate the effect of link state gathering in two-way scheme. In this paper, we design a novel delayer with ordinary FDLs, which can generate both positive and negative delay. The delayer can be used in two-way scheme without affecting the efficacy of link state gathering. Simulation results show that the delayer can greatly reduce the blocking rate of two-way scheme, by just a slight expense of average delay.

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  1. 1.

    Guillemot, C., Renaud, M., & Gambini, P. (1998). Transparent optical packet switching: The European ACTS KEOPS project approach. Journal of Lightwave Technology, 16(12), 2117–2134.

  2. 2.

    Meagher, B., Chang, G. K., & Ellinas, G. (2000). Design and implementation of ultra-low latency optical label switching for packet-switched WDM networks. Journal of Lightwave Technology, 18(12), 1978–1987.

  3. 3.

    Chen, Y., Qiao, C. M., & Yu, X. (2004). Optical burst switching: A new area in optical networking research. IEEE Network, 18, 16–23.

  4. 4.

    Zhu, Z., Hernandez, V. J., & Min, Y. J. (2004). RF photonics signal processing in subcarrier multiplexed optical-label switching communication systems. Journal of Lightwave Technology, 21(12), 3155–3166.

  5. 5.

    Yang, H., Cao, J., & Yang, J. (2005). Advanced optical-label routing system supporting multicast, optical ttl, and multimedia applications. Journal of Lightwave Technology, 23(10), 3270–3281.

  6. 6.

    Jue, J. P., & Vokkarane, V. M. (2005). Contention resolution. In Poston (Ed.), Optical burst switched networks (pp. 57–80). Berlin: Springer.

  7. 7.

    Pan, Z., Yang, H., & Zhu, Z. (2006). Demonstration of an optical-label switching router with multicast and contention resolution at mixed data rates. IEEE Photonics Technology Letters, 18(2), 307–309.

  8. 8.

    Yang, H., Zhu, Z., Xiang, B., et al. (2007). Design and experimental demonstration of novel optical router controller capable of asynchronous, variable-length packet switching and contention resolution, In Proceedings of the optical fiber communication and the national fiber optic engineers conference, 2007. OFC/NFOEC (Vol. 2007, pp. 1–3).

  9. 9.

    Xiang, B., Zhu, Z., Yang, H., et al. (2007). First field trial of OLS network testbed with all-optical contention resolution of asynchronous, variable-length optical packets. In Proceedings of the optical fiber communication and the national fiber optic engineers conference, 2007. OFC/NFOEC (Vol. 2007, pp. 1–3).

  10. 10.

    Zhang, Z., Liu, L., & Yang, Y. (2007). Slotted optical burst switching (SOBS) networks. Computer Communications, 30, 3471–3479.

  11. 11.

    Wei, J. Y., & McFarland, R. I. (2000). Just-in-time signaling for WDM optical burst switching networks. Journal of Lightwave Technology, 18, 2019–2037.

  12. 12.

    Yoo, M., & Qiao, C. M. (1997). Just-enough-time (JET): A high speed protocol for bursty traffic in optical networks. Vertical-Cavity Lasers, Technologies for a Global Information Infrastructure, WDM Components Technology, Advanced Semiconductor Lasers and Applications, Gallium Nitride Materials, Processing, 11–15, 26–27.

  13. 13.

    Widjaja, I. (1995). Performance analysis of burst admission-control protocols. IEE Proceedings Communications, 142, 7–14.

  14. 14.

    Yuan, J., Zhou, X., & Wang, J. (2012). A subscription-based two-way signaling for optical burst switched networks. Photonic Network Communication, 24, 198–209.

  15. 15.

    Yuan, J., Zhou, X., & Wang, J. (2012). Inverse two-way signaling scheme for optical burst switched networks. Optical Switching and Networking, 9(9), 214–223.

  16. 16.

    Dijkstra, E. W. (1959). A note on two problems in connexion with graphs. Numerische Mathematik, 1, 269–271.

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This work is supported by Nature Science Foundation of China No. 61501406 and 61772477, and Higher Educational Scientific Research Program of Henan Province No. 15A510015 and 15A520032.

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Correspondence to Xuhong Li.

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Li, X., Yuan, J., Zhang, Q. et al. A positive–negative delayer for slotted OBS networks to enhance two-way signaling scheme. Telecommun Syst 71, 111–120 (2019). https://doi.org/10.1007/s11235-018-0501-x

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  • Optical burst switching
  • Slotted OBS
  • Positive–negative delayer
  • Signaling
  • Fiber delay line