Improving TCP Performance over Optimal CSMA in Wireless Multi-Hop Networks

Author

Lee, Jinsung ; Lee, Hyang-Won ; Yi, Yung ; Chong, Song

Author_Institution

Dept. of Electr. Eng., KAIST, Daejeon, South Korea

Volume

16

Issue

9

fYear

2012

fDate

9/1/2012 12:00:00 AM

Firstpage

1388

Lastpage

1391

Abstract

Optimal CSMA (oCSMA) has been receiving extensive attentions for its provable optimality in throughput and fairness without message passing over wireless multi-hop networks. However, recent studies suggest that TCP over oCSMA performs poorly, hindering the deployment of oCSMA in real networks. In this letter, we show that just a simple, additional virtual queue at the MAC layer can significantly improve TCP performance when oCSMA is used as the underlying MAC. Through testbed-based experiments, we demonstrate that with our virtual queueing scheme, TCP flows achieve near-optimal throughput performance in various scenarios.

Keywords

carrier sense multiple access; queueing theory; radio networks; transport protocols; MAC layer; TCP performance; optimal CSMA; testbed-based experiment; virtual queueing scheme; wireless multihop network; Clocks; IEEE 802.11 Standards; Multiaccess communication; Protocols; Spread spectrum communication; Throughput; Wireless communication; 802.11 implementation; CSMA; TCP; fairness;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.071612.120157

Filename

6244789