The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Study on Dynamic Bandwidth Allocation Mechanism for an Enhancement of E-PON's Upstream Throughput

E-PON의 상향 대역전송 성능 향상을 위한 동적대역할당 메커니즘 연구

  • Published : 2007.08.31
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Abstract

IEEE ratified IEEE802.3ah as the standard of E-PON, while it leaved the specific method of upstream bandwidth allocation as a role of implementation vendors. Many experts have researched the method of enhancing upstream bandwidth throughput and released related papers. This paper presents another novel mechanism to enhance upstream throughput. This mechanism performs the management of upstream queues by giving the minimum bandwidth of different level to each queue. In order to process packets on each queue we adopted a modified weighted DRR technology. By doing so, the transmission throughput of upstream packets can be largely enhanced. The experimental simulation of this mechanism showed an enhancement of bandwidth utilization more than 10% in comparison to legacy method.

IEEE는 E-PON에 대한 구현 표준으로 IEEE802.3ah을 제정하였으나 구체적인 상향대역할당 메커니즘에 대해서는 별도로 규정하지 않고 제조업체의 몫으로 남겨 두었다. 이에 관련 전문가들은 E-PON에서의 상향 전송에 대한 성능 개선 및 다양한 서비스 수용을 위해서 여러 방식의 상향대역할당 기법들을 연구하였다. 본 논문에서는 상향 트래픽 전송 성능을 개선하는 동적대역할당 메커니즘을 제안한다. 이 메커니즘은 ONU의 상향전송 큐별로 최소보장 상향대역을 다양하게 설정할 수 있도록 하였으며, 큐에 대기 중인 패킷을 전송하기 위하여 큐별로 가중치를 부여한 DRR(Deficit Round Robin) 기법을 적용하였다. 시뮬레이션에 의해 상향대역 이용률이 기존방식 대비 10% 이상 개선됨을 보여 주었다.

Keywords

References

  1. IEEE 802.3ah draft at http://www.ieee802.org /3/efm
  2. Glen Kramer, 'Interleaved Polling with Adaptive Cycle Time(IPACT): A Dynamic Bandwidth Distribution Scheme in an Optical Access Network', Photonic Network Communications. 4:1,89-107, 2002 https://doi.org/10.1023/A:1012959023043
  3. Su-il Choi,'Cyclic Polling-Based Dynamic Bandwidth Allocation for Differentiated Classes of Service in EPON Networks', Photonic Network Communications.7:1, 87-97, 2004 https://doi.org/10.1023/A:1027461505117
  4. Jun Zheng and Hussein T.Mouftah, 'An Adactive MAC Polling Protocol EPON', 2005, ICC
  5. Kyuho Son, Hyungkeun Ryu, 'Dynamic Bandwidth Allocation Schemes to Improve Utilization under Non-Uniform Traffic in EPONs', 2004 ICC
  6. Glen Kramer and Biswanath Mukherjee, 'Supporting differentiated classes of service in EPONs', August&September 2002/Vol. 1, Nos. 8&9/JOURNAL OF OPTICAL NETWORKING
  7. Yeon-Mo Yang, Sang-Ook Lee, Hae-Won Jung, Kiseon Kim, and ByungHa Ahn, 'Inter-ONU Bandwidth Scheduling by Using Threshold Reporting and Adaptive Polling for Qos in EPONs', ETRI Journal, Volume 27, Number 6, December 2005
  8. M. Shreedhar, et. al., 'Efficient Fair Queuing Using Deficit Round Robin,' June 1996, IEEE/ ACM TRANSACTIONS ON NETWORKING
  9. Jing Xie, Shengming Jiang, 'A DBA Scheme for Differentiated Services in EPONs', IEEE Optical Communications, August 2004