| 一种有线无线混合网络下减少TCP重复应答的跨层机制 |
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| 引用本文： | 吴维农,曾清,廖勇.一种有线无线混合网络下减少TCP重复应答的跨层机制[J].世界科技研究与发展,2011,33(5):823-825. |
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| 作者姓名： | 吴维农 曾清 廖勇 |
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| 作者单位： | 1. 重庆渝电信息通信有限公司,重庆,400014
2. 重庆大学通信与测控中心,重庆,400044 |
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| 摘 要： | 针对有线无线混合网络中TCP ACK与MAC ACK重复应答问题，提出一种跨层设计机制。通过AP代理回复移动接收端的TCP ACK，避免了移动接收端同时发送MAC ACK和TCP ACK（移动接收端只发送MAC ACK）。该机制实现简单，只需少量修改IEEE802．11帧格式，在帧控制域中添加必要的TCP ACK类型指示和传递接收端建议窗口大小，就能有效地解决MAC到TCP包收发错误和发送端不能获取接收端接收TCP数据报文能力的问题；并且很容易在现有设备上进行升级。仿真结果表明，该机稍比传统TCP重复应答机制提高约30％的吞吐量。
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| 关 键 词： | 无线局域网 传输控制协议 重复应答 跨层设计 |
Cross-layer Approach to Reduce TCP Duplicate Acknowledgements in Wired-cum-Wireless Networks |
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| WU Weinong,ZENG Qing,LIAO Yong.Cross-layer Approach to Reduce TCP Duplicate Acknowledgements in Wired-cum-Wireless Networks[J].World Sci-tech R & D,2011,33(5):823-825. |
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| Authors: | WU Weinong ZENG Qing LIAO Yong |
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| Institution: | 1. Chongqing Yudian Information ＆ Communication Co. ,Ltd. , Chongqing 4000141; 2. Center of Communication and Tracking Telemetering Command, Chongqing University, Chongqing 400044) |
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| Abstract: | A novel cross-layer design scheme is proposed to reply to mobile receiver＇s TCP ACK by AP proxy, which can avoid mobile receiver sending MAC ACK and TCP ACK redundantly in wired-cure-wireless hybrid networks （i. e, the mobile receiver only sends MAC ACK）. The scheme is backward compatible and simple. With little modification of IEEE 802. 11 frame format,in which TCP ACK type indication and delivery receiver advertised window size are added in frame control field, the packet error between MAC and TCP and sender＇s incapability on receiver＇s TGP capacity ability can be effectively solved. The simulation results show that the throughput of the proposed scheme is approximately 30% higher than traditional TCP duplicate acknowledgements scheme. |
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| Keywords: | WLANs TCP duplicate acknowledgements cross-layer design |
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