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QoS Provisioning in EPON Systems with Interleaved Two Phase Polling-Based DBA

  • I-Shyan HwangEmail author
  • Jhong-Yue Lee
  • Zen-Der Shyu
Chapter
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 70)

Abstract

Ethernet Passive Optical Networks (EPONs) are designed to deliver multiple services and applications, such as voice communications, standard (SDTV) and high-definition video (HDTV). To support these applications and their various requirements, EPONs require Quality-of-Service (QoS) mechanisms to be built in service. For this purpose, a scalable Interleaved Dynamic Bandwidth Allocation (IDBA) mechanism for sharing the uplink bandwidth among optical network units (ONUs) is proposed in this paper. The modus operandi of IDBA is to divide the cycle time by partitioning the ONUs into two groups with some timing overlap to execute interleaved bandwidth allocation, which cooperates with Limited Bandwidth Allocation (LBA), Excess Bandwidth Reallocation (EBR) and accurate prediction mechanism in EPONs. The proposed IDBA mechanism has two advantages, namely it eliminates the idle period problem in the traditional DBA mechanism, and guarantees QoS services by dynamically adjusting the bandwidth within the group of subscribers. This will not only support the differentiated services architecture but also offer various QoS levels. Simulation results obtained show that the proposed IDBA mechanism achieves desirable system performance relative to packet delay, jitter performance, throughput, ratio of packet loss and fairness.

Keywords

EPON QoS IDBA System performance EBR 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of Computer Science and EngineeringYuan-Ze UniversityChung-LiTaiwan
  2. 2.Department of General StudiesArmy AcademyChung-LiTaiwan
  3. 3.Department of General StudiesArmy AcademyChung-LiTaiwan

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