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Network coding based joint signaling and dynamic bandwidth allocation scheme for inter optical network unit communication in passive optical networks

机译：无源光网络中基于网络编码的联合信令和动态带宽分配方案，用于光网络间通信

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摘要

As an innovative and promising technology, network coding has been introduced to passive optical networks (PON) in recent years to support inter optical network unit (ONU) communication, yet the signaling process and dynamic bandwidth allocation (DBA) in PON with network coding (NC-PON) still need further study. Thus, we propose a joint signaling and DBA scheme for efficiently supporting differentiated services of inter ONU communication in NC-PON. In the proposed joint scheme, the signaling process lays the foundation to fulfill network coding in PON, and it can not only avoid the potential threat to downstream security in previous schemes but also be suitable for the proposed hybrid dynamic bandwidth allocation (HDBA) scheme. In HDBA, a DBA cycle is divided into two sub-cycles for applying different coding, scheduling and bandwidth allocation strategies to differentiated classes of services. Besides, as network traffic load varies, the entire upstream transmission window for all REPORT messages slides accordingly, leaving the transmission time of one or two sub-cycles to overlap with the bandwidth allocation calculation time at the optical line terminal (the OLT), so that the upstream idle time can be efficiently eliminated. Performance evaluation results validate that compared with the existing two DBA algorithms deployed in NC-PON, HDBA demonstrates the best quality of service (QoS) support in terms of delay for all classes of services, especially guarantees the end-to-end delay bound of high class services. Specifically, HDBA can eliminate queuing delay and scheduling delay of high class services, reduce those of lower class services by at least 20%, and reduce the average end-to-end delay of all services over 50%. Moreover, HDBA also achieves the maximum delay fairness between coded and uncoded lower class services, and medium delay fairness for high class services.
机译：作为一种创新和有前途的技术，近年来，网络编码已被引入无源光网络（PON）中，以支持光网络单元之间（ONU）的通信，然而，采用网络编码的PON中的信令过程和动态带宽分配（DBA）（ NC-PON）仍需进一步研究。因此，我们提出了一种联合信令和DBA方案，以有效地支持NC-PON中ONU间通信的差异化服务。在提出的联合方案中，信令过程为在PON中完成网络编码奠定了基础，它不仅可以避免以前方案中对下行安全性的潜在威胁，而且适合于提出的混合动态带宽分配（HDBA）方案。在HDBA中，DBA周期分为两个子周期，用于将不同的编码，调度和带宽分配策略应用于不同的服务类别。此外，随着网络流量负载的变化，所有REPORT消息的整个上游传输窗口会相应滑动，从而使一个或两个子周期的传输时间与光线路终端（OLT）的带宽分配计算时间重叠，因此这样可以有效地消除上游空闲时间。性能评估结果证明，与在NC-PON中部署的现有两种DBA算法相比，HDBA在所有服务类别的延迟方面都展示了最佳的服务质量（QoS）支持，尤其是保证了端到端的延迟范围。高档服务。具体地说，HDBA可以消除高级服务的排队延迟和调度延迟，将低级服务的排队延迟和调度延迟减少至少20％，并将所有服务的平均端到端延迟降低50％以上。此外，HDBA还实现了编码和未编码的低级服务之间的最大延迟公平性，以及高级服务之间的中等延迟公平性。

著录项

  • 来源
    《Optical fiber technology》 |2014年第3期|280-293|共14页
  • 作者

    Pei Wei; Rentao Gu; Yuefeng Ji;

  • 作者单位

    State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, P.O. Box 90, 100876 Beijing, PR China;

    State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, P.O. Box 90, 100876 Beijing, PR China;

    State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, P.O. Box 90, 100876 Beijing, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Passive optical networks (PON); Network coding (NC); Signaling; Dynamic bandwidth allocation (DBA);

    机译：无源光网络（PON）;网络编码（NC）;信令;动态带宽分配（DBA）;

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