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논문 상세정보

Performance Analysis of Random Early Dropping Effect at an Edge Router for TCP Fairness of DiffServ Assured Service


The differentiated services(DiffServ) architecture provides packet level service differentiation through the simple and predefined Per-Hop Behaviors(PHBs). The Assured Forwarding(AF) PHB proposed as the assured services uses the RED-in/out(RIO) approach to ensusre the expected capacity specified by the service profile. However, the AF PHB fails to give good QoS and fairness to the TCP flows. This is because OUT(out- of-profile) packet droppings at the RIO buffer are unfair and sporadic during only network congestion while the TCP's congestion control algorithm works with a different round trip time(RTT). In this paper, we propose an Adaptive Regulating Drop(ARD) marker, as a novel dropping strategy at the ingressive edge router, to improve TCP fairness in assured services without a decrease in the link utilization. To drop packets pertinently, the ARD marker adaptively changes a Temporary Permitted Rate(TPR) for aggregate TCP flows. To reduce the excessive use of greedy TCP flows by notifying droppings of their IN packets constantly to them without a decrease in the link utilization, according to the TPR, the ARD marker performs random early fair remarking and dropping of their excessive IN packets at the aggregate flow level. Thus, the throughput of a TCP flow no more depends on only the sporadic and unfair OUT packet droppings at the RIO buffer in the core router. Then, the ARD marker regulates the packet transmission rate of each TCP flow to the contract rate by increasing TCP fairness, without a decrease in the link utilization.

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참고문헌 (10)

  1. S. Blake, D. Black, M. Carlson, E. Davies, Z. Wang, and W. Weiss, 'An architecture for Differentiated Services,' RFC2475, Network Working Group, Dec. 1998 
  2. S. Floyd and V. Jacobson, 'On traffic phase effects in packet switched gateways,' Intenetworking:Research and Experience, vol.3, no.3, pp.115-156, Sept. 1992 
  3. W. Feng, D. Kandlur, D. Saha, and K. Shin, 'Understanding and improving TCP performance over networks with minimum rate guarantees,' IEEE/ACM Transactions on Networking, vol.7, no.2, pp.173-187, Apr. 1999 
  4. R. Jain, The Art of Computer Systems Performance Analysis, John Wiley and Sons Inc., 1991 
  5. J. Heinanen, F. Baker, W. Weiss, and J. Wroclawski, 'Assured Forwarding PHB Group,' RFC 2597, Network Working Group, June 1999 
  6. K Nichols, S. Blake, F. Baker, and D.L. Black, 'DefInition of the Differentiated Service Field(DS Field) in the IPv4 and IPv6 headers,' RFC2474, Network Working Group, Dec. 1998 
  7. V. Jacobson, K. Nichols, and K Poduri,'An Expedited Forwarding PHB,' RFC 2598, Network Working Group, June 1999 
  8. D. Clark and W. Fang, 'Explicit Allocation of Best-Effort Packet Delivery Service,' IEEE/ACM Transactions on Networking, vol.6, no.4, pp.362-373, Aug. 1998 
  9. I.Yeom and A. L. Narasimha Reddy, 'Marking for QoS Improvement,' Computer Communications, vol. 24, no. 1, pp. 35-50, Jan. 2001 
  10. W. Feng, D.D. Kandlur, D. Saha, and KG. Shin, 'Adaptive Packet Marking for Maintaining End-to-End Throughput in a Differentiated-Services Internet,' IEEE/ACM Transactions on Networking, vol.7, no.5, pp.685-697, Oct. 1999 

이 논문을 인용한 문헌 (1)

  1. Kim, Hoon-Ki ; Hong, Sung-Hwa 2009. "The Performance Analysis of TRC Dropper to improve fairness on DiffServ Networks" 한국시뮬레이션학회논문지 = Journal of the Korea Society for Simulation, 18(3): 91~102 


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