Tool Release: Gathering 802.11n Traces with Channel State Information
Tool Release: Gathering 802.11n Traces with Channel State Information
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DOI：
10.1145/1925861.1925870
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发表时间：
2011-01-01
影响因子：
2.8
通讯作者：
Wetherall, David
中科院分区：
文献类型：
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作者：
Halperin, Daniel;Hu, Wenjun;Wetherall, David
我们很高兴地宣布发布一个工具，记录无线信道的详细测量沿着收到的802.11数据包跟踪。它运行在商用802.11n NIC上，并根据802.11标准记录信道状态信息（CSI）。与接收信号强度指示器（RSSI）值不同，它仅捕获侦听器接收的总功率，CSI包含有关发送器和接收器之间的信道的信息，这些信息是针对每对发送和接收天线的单个数据子载波级别的。我们的工具包使用带有3个天线的Intel WiFi Link 5300无线网卡。它可以在最新的Linux操作系统上运行：在我们的测试平台中，我们使用Ubuntu 10.04 LTS和2.6.36内核。测量设置包括我们定制版本的英特尔闭源固件和开源iwlwifi无线驱动程序、用于实现这些测量的用户空间工具、用于控制链路两端的接入点功能以及用于数据分析的Matlab（或Octave）脚本。我们正在发布修改后的固件的二进制文件，以及所有其他组件的源代码。
We are pleased to announce the release of a tool that records detailed measurements of the wireless channel along with received 802.11 packet traces. It runs on a commodity 802.11n NIC, and records Channel State Information (CSI) based on the 802.11 standard. Unlike Receive Signal Strength Indicator (RSSI) values, which merely capture the total power received at the listener, the CSI contains information about the channel between sender and receiver at the level of individual data subcarriers, for each pair of transmit and receive antennas.Our toolkit uses the Intel WiFi Link 5300 wireless NIC with 3 antennas. It works on up-to-date Linux operating systems: in our testbed we use Ubuntu 10.04 LTS with the 2.6.36 kernel. The measurement setup comprises our customized versions of Intel's close-source firmware and open-source iwlwifi wireless driver, user-space tools to enable these measurements, access point functionality for controlling both ends of the link, and Matlab (or Octave) scripts for data analysis. We are releasing the binary of the modified firmware, and the source code to all the other components.