Core-stateless fair rate estimation fair queuing

Jung Shian Li, Yi Ting Lin, Ching Fang Yang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Core-stateless mechanisms, such as core-stateless fair queuing (CSFQ), reduce the complexity of fair queuing, which usually need to maintain states, manage buffers, and perform flow scheduling on a per-flow basis. However, they require executing label rewriting and dropping decision on a per-packet basis, thus preventing them from being widely deployed. In this paper, we propose a novel architecture based on CSFQ without per-packet labelling. Similarly, we distinguish between edge routers and core routers. Edge routers maintain the per-flow state by employing a fair queuing mechanism to allocate each flow a fair bandwidth share locally and a token bucket mechanism to regulate those flows with feedback packets sent from egress edge routers. Core routers do not maintain per-flow state; they use FIFO packet scheduling extended by a fare rate alarm mechanism by estimating the arrival rate and the number of flows using a matching-mismatching algorithm. The novel scheme is called core-stateless fair rate estimation fair queuing (CSFREFQ). CSFREFQ is proven to be capable of achieving max-min fairness. Furthermore, we present and discuss simulations and experiments on the performance under different traffic scenarios.

Original languageEnglish
Pages (from-to)679-697
Number of pages19
JournalInternational Journal of Communication Systems
Issue number6
Publication statusPublished - 2006 Aug

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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