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dc.contributor.authorHwang, I-Shyan
dc.contributor.authorLee, Jhong-Yue
dc.contributor.authorShyu, Zen-Der
dc.date.accessioned2011-01-26T01:29:15Z
dc.date.accessioned2020-05-18T03:10:41Z-
dc.date.available2011-01-26T01:29:15Z
dc.date.available2020-05-18T03:10:41Z-
dc.date.issued2011-01-26T01:29:15Z
dc.date.submitted2011-01-10
dc.identifier.urihttp://dspace.lib.fcu.edu.tw/handle/2377/29983-
dc.description.abstractEthernet Passive Optical Network (EPON) was proposed to overcome the bandwidth bottleneck at the Access Networks due to its simplicity, cost effectiveness and wide spread deployment. The architecture in access networks can affect the system performance, because access networks transmit aggregated high-speed traffic from hundreds of subscribers. Dynamic bandwidth allocation (DBA) mechanisms have been applied in backbone networks, but are not considered significantly in the scope of star-ring architecture. In this paper, we propose a distributed QoSBased Dynamic Bandwidth Allocation (DQ-DBA) scheduling for a modified star-ring-based EPON architecture. The modified star-ring architecture includes OLT, Sub-OLT (an intermediary between OLT and ONUs) and ONUs. The DQDBA is making the highest priority traffic (EF) of each ONU is sent to OLT by tree structure, and the minor priority traffic (AF and BE) of each ONU are transmitted to Sub-OLT by ring architecture. Furthermore, this approach can effectively resolve the idle period problem and reduce overload of OLT in traditional DBA mechanism. We perform exhaustive simulation experiments to study the system performance between tree architecture and star-ring architecture to validate the usefulness of the proposed mechanism. The simulation results show that the proposed DQ-DBA mechanism in modified star-ring architecture can reduce the packet delay and packet delay variation for high priority ONUs to ensure Quality of Service (QoS).
dc.description.sponsorshipNational Cheng Kung University,Tainan
dc.format.extent6p.
dc.relation.ispartofseries2010 ICS會議
dc.subjectDQ-DBA
dc.subjectEPONs
dc.subjectSub-OLT
dc.subjectQoS
dc.subjectModified starring architecture
dc.subject.otherComputer Networks and Web Technologies
dc.titlePerformance Assessment between Tree- and Star-ring-based EPONs
分類:2010年 ICS 國際計算機會議(如需查看全文,請連結至IEEE Xplore網站)

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