Previous research shows that the IEEE 802.11 DCF channel contention mechanism is not capable of providing throughput fairness among nodes in different locations of the wireless mesh network. The node nearest the gateway will always strive for the chance to transmit data, causing fewer transmission opportunities for the nodes farther from the gateway, resulting in starvation. Prior studies modify the DCF mechanism to address the fairness problem. This paper focuses on the fairness study when TCP flows are carried over wireless mesh networks. By not modifying lower layer protocols, the current work identifies TCP parameters that impact throughput fairness and proposes adjusting those parameters to reduce frame collisions and improve throughput fairness. With the aid of mathematical formulation and ns2 simulations, this study finds that frame transmission from each node can be effectively controlled by properly controlling the delayed ACK timer and using a suitable advertised window. The proposed method reduces frame collisions and greatly improves TCP throughput fairness.
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Ting-Chao HOU, Chih-Wei HSU, "Achieving Fair Throughput among TCP Flows in Multi-Hop Wireless Mesh Networks" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 4, pp. 916-927, April 2010, doi: 10.1587/transcom.E93.B.916.
Abstract: Previous research shows that the IEEE 802.11 DCF channel contention mechanism is not capable of providing throughput fairness among nodes in different locations of the wireless mesh network. The node nearest the gateway will always strive for the chance to transmit data, causing fewer transmission opportunities for the nodes farther from the gateway, resulting in starvation. Prior studies modify the DCF mechanism to address the fairness problem. This paper focuses on the fairness study when TCP flows are carried over wireless mesh networks. By not modifying lower layer protocols, the current work identifies TCP parameters that impact throughput fairness and proposes adjusting those parameters to reduce frame collisions and improve throughput fairness. With the aid of mathematical formulation and ns2 simulations, this study finds that frame transmission from each node can be effectively controlled by properly controlling the delayed ACK timer and using a suitable advertised window. The proposed method reduces frame collisions and greatly improves TCP throughput fairness.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.916/_p
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@ARTICLE{e93-b_4_916,
author={Ting-Chao HOU, Chih-Wei HSU, },
journal={IEICE TRANSACTIONS on Communications},
title={Achieving Fair Throughput among TCP Flows in Multi-Hop Wireless Mesh Networks},
year={2010},
volume={E93-B},
number={4},
pages={916-927},
abstract={Previous research shows that the IEEE 802.11 DCF channel contention mechanism is not capable of providing throughput fairness among nodes in different locations of the wireless mesh network. The node nearest the gateway will always strive for the chance to transmit data, causing fewer transmission opportunities for the nodes farther from the gateway, resulting in starvation. Prior studies modify the DCF mechanism to address the fairness problem. This paper focuses on the fairness study when TCP flows are carried over wireless mesh networks. By not modifying lower layer protocols, the current work identifies TCP parameters that impact throughput fairness and proposes adjusting those parameters to reduce frame collisions and improve throughput fairness. With the aid of mathematical formulation and ns2 simulations, this study finds that frame transmission from each node can be effectively controlled by properly controlling the delayed ACK timer and using a suitable advertised window. The proposed method reduces frame collisions and greatly improves TCP throughput fairness.},
keywords={},
doi={10.1587/transcom.E93.B.916},
ISSN={1745-1345},
month={April},}
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TY - JOUR
TI - Achieving Fair Throughput among TCP Flows in Multi-Hop Wireless Mesh Networks
T2 - IEICE TRANSACTIONS on Communications
SP - 916
EP - 927
AU - Ting-Chao HOU
AU - Chih-Wei HSU
PY - 2010
DO - 10.1587/transcom.E93.B.916
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2010
AB - Previous research shows that the IEEE 802.11 DCF channel contention mechanism is not capable of providing throughput fairness among nodes in different locations of the wireless mesh network. The node nearest the gateway will always strive for the chance to transmit data, causing fewer transmission opportunities for the nodes farther from the gateway, resulting in starvation. Prior studies modify the DCF mechanism to address the fairness problem. This paper focuses on the fairness study when TCP flows are carried over wireless mesh networks. By not modifying lower layer protocols, the current work identifies TCP parameters that impact throughput fairness and proposes adjusting those parameters to reduce frame collisions and improve throughput fairness. With the aid of mathematical formulation and ns2 simulations, this study finds that frame transmission from each node can be effectively controlled by properly controlling the delayed ACK timer and using a suitable advertised window. The proposed method reduces frame collisions and greatly improves TCP throughput fairness.
ER -