A Redundant Traffic Elimination Method with using Overhearing in Wireless LAN

在无线LAN中，由于与终端共享带宽，因此即使下载相同的内容，下载速度也会降低。我们提出了一种下载加速方法的内容分发偷听数据包的相同内容的其他节点在无线局域网中。由于部分内容是通过偷听获得的，因此减少了下载时间。该方法将内容分成多个片段，由服务器进行分发，首先给出了应用网络编码的片段发送和目的地的调度方法，并在测试平台上对这些方法进行了评估，然后对该方法的可扩展性进行了评估，但发现分布式仿真器在建模精度方面存在问题。我们改进模拟器的建模和评估所提出的方法的可扩展性。

In wireless LAN, since the bandwidth is shared with the terminals, the download speed is reduced even if the same content is downloaded. We have proposed a download acceleration method for content distribution by overhearing packets of the same content for other nodes in wireless LAN. Since parts of the content are obtained by the overhearing, the download time is reduced. In the method, the content is divided into pieces and the server distributes them.First, we show scheduling methods of pieces to send and destination with applying network coding, and evaluated these methods in testbed.Next, we evaluate scalability of the proposed method but we found that a distributed emulator has problems for modeling accuracy. We improve modeling of the emulator and evaluate scalability of the proposed method.