| 一种无线Mesh网络跨层丢包通告机制 |
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| 引用本文： | 廖勇,王聪,王丹,徐昌彪.一种无线Mesh网络跨层丢包通告机制[J].计算机工程,2011,37(13):1-4. |
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| 作者姓名： | 廖勇 王聪 王丹 徐昌彪 |
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| 作者单位： | 1. 重庆大学通信与测控中心,重庆,400044
2. 重庆邮电大学通信与信息工程学院,重庆,400065 |
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| 基金项目： | 重庆市科学技术委员会基金资助项目"移动宽带无线接入系统研发及产业化"，中央高校基本科研业务费基金资助项目 |
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| 摘 要： | 现有TCP机制无法有效区分网络丢包是拥塞丢包还是“失聪”丢包。针对该问题，提出一种在无线Mesh网络环境下跨层显示“失聪”丢包通告机制。该机制在系统使用定向天线条件下采用基于忙音的媒体接入控制机制区分数据丢包原因，通过IP和TCP跨层设计显示通告帧和定义的多跳转发规则向源端进行正确的通告。利用该机制对线性无线Mesh网络进行理论推导和分析，并通过数值实验证明其可行性和有效性。
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| 关 键 词： | 无线Mesh网络 丢包通告机制 定向天线 跨层 失聪 拥塞丢包 媒体接入控制 |
| 收稿时间： | 2010-12-06 |
Cross-layer Packet Loss Notification Mechanism in Wireless Mesh Networks |
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| LIAO Yong,WANG Cong,WANG Dan,XU Chang-biao.Cross-layer Packet Loss Notification Mechanism in Wireless Mesh Networks[J].Computer Engineering,2011,37(13):1-4. |
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| Authors: | LIAO Yong WANG Cong WANG Dan XU Chang-biao |
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| Affiliation: | 1.Center of Communication and Tracking Telemetering Command,Chongqing University,Chongqing 400044,China;2.School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
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| Abstract: | The existing TCP mechanisms can not effectively distinguish the cause of packet loss in wireless networks whether it is triggered by congestion or deafness.In order to solve the problem,this paper proposes a Cross-layer Explicit Deafness Notification（CLEDN） in wireless Mesh network.It adopts Media Access Control（MAC） based on busy tones when system uses directional antennas,and an explicit notification frame is designed between IP and TCP,which is passed to source node through the user-defined multi-hop forwarding rule.The mechanism is applied to theoretical deduction and analysis in linear wireless Mesh networks,and numerical analysis verifies its feasibility and validity. |
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| Keywords: | wireless Mesh networks packet loss notification mechanism directional antenna cross-layer deafness packet loss by congestion Media Access Control（MAC） |
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