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

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

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

EPON System Model

OLT 、 ODN 、 ONU

Downlink-broadcast

Uplink-

time-division

Introduction

EPON： the next generation broadband access network

QoS of different services Improve uplink bandwidth utilization Eliminating the idle time New dynamic allocation scheme

Previous Bandwidth Allocation Scheme IPACT： does not support Qos

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

Bandwidth allocation scheme of OLT

Inner-scheduling of ONU

1.

2.

3.

4.

5.

Inner-scheduling of ONU

6.

7.

Theoretical maximun throughput

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

Conclusion

The HUHG algorithm improves network throughput removing or diminishing idle time of EPON scheduling.