HUHG:High Utilization and Hybrid Granting algorithm for EPON
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HUHG:High Utilization and Hybrid Granting algorithm for EPON
指導教授 :黃鈴玲學生 :李孟璋報告日期: 2006.11.22
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作者 &出處
作者: Jun-Seog Kim; Hun-je Yeon出處: Telecommunications, 2006. AICT-I
CIW '06. International Conference on Internet and Web Applications and Services/Advanced International Conference
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Outline EPON System Model Introduction Previous Bandwidth Allocation Schemes The New Dynamic Bandwidth Allocation Sche
me: HUHG Bandwidth allocation scheme of OLT Inner-scheduling of ONU
Theoretical maximum throughput Simulation Results Conclusion
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EPON System Model
OLT 、 ODN 、 ONU
Downlink-broadcast
Uplink-
time-division
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Introduction
EPON: the next generation broadband access network
QoS of different services Improve uplink bandwidth utilization Eliminating the idle time New dynamic allocation scheme
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Previous Bandwidth Allocation Scheme IPACT: does not support Qos
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The New Dynamic Bandwidth Allocation Scheme: HUHG
Traffic is divided into three class: EF、 AF、BE
EF: Highest priority AF:Middle priority BE: Lowest priority EF class doesn’t need Report message to b
e granted in EF sub-cycle
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Bandwidth allocation scheme of OLT
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Inner-scheduling of ONU
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Inner-scheduling of ONU
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Theoretical maximun throughput
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Simulation Results1.Simulation time: 100sec2.Packet size: 40522~1500
bytes3.Traffic model: exponential4.ONUs equally weighted5.60% for AF class 6.40% for BE class
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Conclusion
The HUHG algorithm improves network throughput removing or diminishing idle time of EPON scheduling.