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Dual-layer efficiency enhancement for future passive optical network

面向未来无源光网络的双层效率增强机制

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Abstract

Ever-increasing demands on bandwidth compel us to improve the bandwidth utilization of access networks. It is more important to enhance the efficiency of passive optical networks (PON) than other access technologies, as they are the primary solutions to various access scenarios. To satisfy the demands of improved bandwidth efficiency, we propose a dual-layer (data link layer and network layer) efficiency enhancement scheme for future PON system. Under this architecture, a data-link-layer flexible coding scheme is introduced to extend the downstream link throughput, and a network-layer centralized active queue management (AQM) scheme is introduced to increase bandwidth efficiency. Both of these technologies are designed to suit the future centralized cooperative control mode. The results of an experimental demonstration of the network coding PON scheme reveal the efficiency of the proposed architecture. The results of simulations show that the centralized AQM scheme has a positive influence on queuing delay and jitter. To the best of our knowledge, this is the first time that a data link layer mechanism and a network layer policy have been integrated to provide high efficiency and quality of service in access networks.

创新点

本文首次针对无源光网络(PON)提出了集中控制下的双层(数据链路层和网络层)效率提升机制。该机制在数据链路层引入了可变光分配网(ODN)的灵活网络编码的同时,在网络层引入了集中式主动队列管理(AQM)切换方案,以增加PON系统下行链路吞吐量、降低网络延迟和抖动。实验测试表明,该系统可提升下行带宽吞吐量近40%,同时增强了排队管理效果的稳定性。所提出方案能够在接入侧实现高效的数据流量压缩和流量疏导,将可用于满足未来接入网集中管控与高效传输需求。

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Correspondence to Yuefeng Ji.

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Ji, Y., Wang, X., Zhang, S. et al. Dual-layer efficiency enhancement for future passive optical network. Sci. China Inf. Sci. 59, 1–13 (2016). https://doi.org/10.1007/s11432-015-5430-7

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Keywords

  • passive optical network
  • bandwidth efficiency
  • network coding
  • active queue management
  • centralized control

Keywords

  • 022313

关键词

  • 无源光网络
  • 带宽效率
  • 网络编码
  • 主动队列管理
  • 集中控制