Fair Share – Aware Active Queue Management for Heterogeneous Flows –

Kyungkoo JUN  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.11   pp.3590-3593
Publication Date: 2012/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3590
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Internet
queue management,  fairness,  drop,  throughput,  

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An active queue management (AQM) scheme is proposed to reduce throughput bias for UDP flows over TCP. It is argued that existing AQM methods partially involve a flow-indifferent factor that does not take into account of bandwidth usage of flows when they determine packet drop, thus resulting in unfairness. The proposed scheme replaces the flow-indifferent part with a flow-wise one by approximating per-flow fair share, which permits the discrimination of unresponsive flows. Since it is a stateless process, it avoids the overhead of tracking the statistics of flows and implementation is simple. A performance evaluation shows that it effectively limits the bandwidth of unresponsive flows to their fair share of bandwidth. In addition, it can also encourage RTT-fairness among TCP flows with different delays.