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基于机会式网络编码的低时延广播传输算法
  • ISSN号：0732-2112
  • 期刊名称：电子学报
  • 时间：0
  • 页码：-
  • 分类：TN92[电子电信—通信与信息系统;电子电信—信息与通信工程]
  • 作者机构：[1]西安电子科技大学ISN国家重点实验室,陕西西安710071
  • 相关基金：国家自然科学基金（No.60702058 No.60832001）; 高等学校创新引智基金（No.B08038）; 教育部留学回国人员科研启动基金（No.JY600090102）; 中央高校基本科研业务费专项资金（No.JY1000901008）
  • 相关项目：网络编码中的几个关键问题研究
作者： 卢冀|肖嵩|吴成柯|LU Ji|XIAO Song|WU Cheng-ke|
关键词： 网络编码, 机会式网络编码, 无线网络, 传输带宽, 广播, network coding, opportunistic network coding, wireless network, transmission bandwidth, broadcast
中文摘要：

为了提高无线网络中数据包广播传输的效率,本文提出了一种基于机会式网络编码的广播传输算法.该算法在发送端按一定顺序选择不同终端的丢包,并采用异或运算编码重传包,在终端采用从重传包中解码数据包的方法恢复丢包.该算法优先恢复时间重要性较高的丢包,并使多个终端同时从单个重传包恢复其丢包,因此有效地提高了广播传输效率并降低了传输时延.在典型的无线信道条件下得到的仿真结果表明了本文算法相比其它算法可以有效地提高传输带宽并降低数据包传输时延.

英文摘要：

An opportunistic network coding based broadcast transmission algorithm（ONCBT） is proposed to improve the transmission efficiency for wireless networks.ONCBT selects lost packets in a sorted order to generate the retransmission packet by XOR operations at sender,and retrieves lost packets from one or more retransmission packets at receivers.ONCBT has a priority to retrieve the lost packets owning higher time important level in each receiver with one retransmission packet,thus improving the transmission efficiency and packet transfer delay.The simulation results show that ONCBT can lead to higher transmission efficiency and lower packet transfer delay compared with other algorithms under typical wireless channel conditions.

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