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Analysis and improvement of TCP performance in opportunistic networks

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Abstract

Opportunistic networks have attracted attention due to their inherent characteristics, such as long latency, low data rate, and intermittent connectivity. Extensive research has been conducted on opportunistic networks, including the architecture, and routing. However, few in the literature report the performance of TCP in opportunistic networks, especially in the case of Epidemic Routing. In this paper, we first evaluate the performance of TCP in opportunistic networks with Epidemic Routing. Our results show that the Epidemic Routing in opportunistic networks degrades the performance of TCP because multicopy data packets cause duplicate ACKs, and in turn reduce the transmission rate of TCP. Then an enhanced algorithm for TCP, named A-TCP/Reno is proposed to solve the above problem. A-TCP/Reno avoids the duplicate ACK problem caused by Epidemic Routing. The simulation results show that A-TCP/Reno outperforms the TCP/Reno in opportunistic networks with Epidemic Routing protocol.

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Acknowledgment

This paper is supported by the National Science Foundation of China (60702055), Program for New Century Excellent Talents in University (NCET-07-0914), China Postdoctoral Science Foundation (20090451158).

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Authors and Affiliations

  1. Research Center for Wireless Networks, Chongqing University of Posts and Telecommunications, Chongqing, 400065, China

    Yun Li, Shiying Lei & Qilie Liu

  2. National Mobile Communications Research Laboratory, Southeast University of China, Nanjing, 210096, China

    Yun Li & Xiaohu You

  3. Department of Electrical and Computer Engineering, South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid City, SD, 57701, USA

    Kazem Sohraby

  4. InterDigital Communications, 781 Third Ave, King of Prussia, PA, 19406, USA

    Chonggang Wang

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  1. Yun Li
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  2. Xiaohu You
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  3. Shiying Lei
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  4. Qilie Liu
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  5. Kazem Sohraby
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  6. Chonggang Wang
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Correspondence to Chonggang Wang.

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Li, Y., You, X., Lei, S. et al. Analysis and improvement of TCP performance in opportunistic networks. Wireless Netw 18, 799–810 (2012). https://doi.org/10.1007/s11276-012-0434-3

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