Embracing wireless interference: Analog network coding
Embracing wireless interference: Analog network coding
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DOI：
10.1145/1282427.1282425
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发表时间：
2007-10-01
影响因子：
2.8
通讯作者：
Katabi, Dina
中科院分区：
文献类型：
--
作者：
Katti, Sachin;Gollakota, Shyamnath;Katabi, Dina
传统上，干扰被认为是有害的。无线网络努力避免同时调度多个传输，以防止干扰。这篇文章采用了相反的方法；它鼓励经过战略选择的发送者进行干预。路由器不转发数据包，而是转发干扰信号。目的地利用网络级信息来消除干扰并恢复发往它的信号。结果是模拟网络编码，因为它混合的是信号而不是比特。那么，如果无线路由器转发信号而不是数据包会怎么样？理论上，这种方法使规范的双向中继网的容量翻了一番。令人惊讶的是，它也是实用的。我们使用软件无线电实现了我们的设计，并表明它比传统的无线路由和以前的无线网络编码工作获得了显著更高的吞吐量。
Traditionally, interference is considered harmful. Wireless networks strive to avoid scheduling multiple transmissions at the same time in order to prevent interference. This paper adopts the opposite approach; it encourages strategically picked senders to interfere. Instead of forwarding packets, routers forward the interfering signals. The destination leverages network-level information to cancel the interference and recover the signal destined to it. The result is analog network coding because it mixes signals not bits.So, what if wireless routers forward signals instead of packets? Theoretically, such an approach doubles the capacity of the canonical 2-way relay network. Surprisingly, it is also practical. We implement our design using software radios and show that it achieves significantly higher throughput than both traditional wireless routing and prior work on wireless network coding.