Title | ||
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A modification of TCP flow control for improving end-to-end TCP performance over networks with wireless links |
Abstract | ||
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End-to-end Transmission Control Protocol (TCP) performance is one of the more important issues in wireless Internet services. This paper proposes the improvement of end-to-end TCP performance via a TCP-aware link layer protocol called Adaptive TCP (A-TCP). The key idea behind the protocol is that an A-TCP agent, which is located in each base station, makes a mobile host look as if it has a wired link with the base station. This concept is referred to in this paper as the virtual host model. In order to implement this model, the A-TCP agent performs three functions: local retransmission, sender freezing and A-TCP flow control. A-TCP flow control is an original proposal and is also the principal factor for improving end-to-end TCP performance in a wireless Internet environment. In A-TCP flow control, the A-TCP agent marks the window field of each acknowledgment segment with a retransmission buffer size. Therefore, the TCP congestion controls, which happen in a TCP sender, are not caused by wireless link overflow. Performance evaluations were conducted via computer simulations and mathematical analyses. The results of the evaluations show not only that the A-TCP improves end-to-end TCP performance by at least 20%, which is higher compared to other TCP approaches, but also that the A-TCP can provide near-optimal performance in wireless bottleneck conditions. In addition, this paper proposes an A-TCP agent architecture, which consists of virtual host objects and several other functional blocks, and describes a new hand-off policy for the virtual host model, called transport-level soft hand-off. |
Year | DOI | Venue |
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2003 | 10.1016/S0140-3664(03)00164-6 | Computer Communications |
Keywords | Field | DocType |
TCP performance,Wireless Internet,Flow control,Soft hand-off | Compound TCP,TCP Westwood plus,CUBIC TCP,Computer science,Computer network,Real-time computing,TCP acceleration,Zeta-TCP,TCP tuning,TCP Friendly Rate Control,TCP global synchronization | Journal |
Volume | Issue | ISSN |
26 | 17 | Computer Communications |
Citations | PageRank | References |
0 | 0.34 | 9 |
Authors | ||
4 |
Name | Order | Citations | PageRank |
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Seung-Joon Seok | 1 | 22 | 12.67 |
Sung Kwan Youm | 2 | 122 | 12.07 |
Soo-Won Kim | 3 | 116 | 29.86 |
Chul-Hee Kang | 4 | 318 | 59.17 |