ETRI Journal
- Volume 30 Issue 2
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- Pages.183-193
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- 2008
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- 1225-6463(pISSN)
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- 2233-7326(eISSN)
Quality-of-Service Mechanisms for Flow-Based Routers
- Ko, Nam-Seok (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
- Hong, Sung-Back (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
- Lee, Kyung-Ho (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
- Park, Hong-Shik (School of Engineering, Information Communications University) ;
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Kim, Nam
(School of Electrical & Computer Engineering, Chungbuk University)
- Received : 2007.08.13
- Published : 2008.04.30
Abstract
In this paper, we propose quality of service mechanisms for flow-based routers which have to handle several million flows at wire speed in high-speed networks. Traffic management mechanisms are proposed for guaranteed traffic and non-guaranteed traffic separately, and then the effective harmonization of the two mechanisms is introduced for real networks in which both traffic types are mixed together. A simple non-work-conserving fair queuing algorithm is proposed for guaranteed traffic, and an adaptive flow-based random early drop algorithm is proposed for non-guaranteed traffic. Based on that basic architecture, we propose a dynamic traffic identification method to dynamically prioritize traffic according to the traffic characteristics of applications. In a high-speed router system, the dynamic traffic identification method could be a good alternative to deep packet inspection, which requires handling of the IP packet header and payload. Through numerical analysis, simulation, and a real system experiment, we demonstrate the performance of the proposed mechanisms.
Keywords
- Fow-based router;
- quality-of-service (QoS);
- IntServ;
- DiffServ;
- packet scheduling;
- dynamic flow identification