Cited 8 time in webofscience Cited 9 time in scopus

A Cross-layer Dual Queue Approach for Improving TCP Fairness in Infrastructure WLANs

Title
A Cross-layer Dual Queue Approach for Improving TCP Fairness in Infrastructure WLANs
Authors
Ha, JuhoPark, Eun-ChanPark, Kyung-JoonChoi, Chong-Ho
DGIST Authors
Park, Kyung-Joon
Issue Date
2009-11
Citation
Wireless Personal Communications, 51(3), 499-516
Type
Article
Article Type
Article
Keywords
Wireless LANFairnessTCP congestion controlCross-layer design
ISSN
0929-6212
Abstract
Fairness is one of the most important performance measures in IEEE 802.11 Wireless Local Area Networks (WLANs), where channel is accessed through competition. In this paper, we focus on the fairness problem between TCP uplink and downlink flows in infrastructure WLANs from the cross-layer perspective. First, we show that there exists a notable discrepancy between throughput of uplink flow and that of downlink flow, and discuss its root cause from the standpoint of different responses to TCP data packet drop and TCP ACK packet drop at the access point (AP) buffer. In order to mitigate this unfairness, we propose a dual queue scheme, which works in a cross-layer manner. It employs two separate queues at the AP, one for the data packets of downlink TCP flows and another for the ACK packets of uplink TCP flows, and selects these queues with appropriate probabilities so that TCP per-flow fairness is improved. Moreover, we analyze the behavior of the dual queue scheme and derive throughputs of uplink and downlink flows. Based on this analysis, we obtain the optimal queue selection probabilities for fairness. Extensive simulation results confirm that the proposed scheme is effective and useful in resolving the TCP unfairness problem without deteriorating overall utilization. © 2009 Springer Science+Business Media, LLC.
URI
http://hdl.handle.net/20.500.11750/6509
DOI
10.1007/s11277-009-9757-5
Publisher
SPRINGER
Related Researcher
  • Author Park, Kyung-Joon CSI(Cyber-Physical Systems Integration) Lab
  • Research Interests Design of Wireless Network for Cyber-Physical System; 무선 센서 네트워크; 강인 무선 네트워크
Files:
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Collection:
Department of Information and Communication EngineeringCSI(Cyber-Physical Systems Integration) Lab1. Journal Articles


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