design

Jinghao Shi
1 parent 6b444969
Showing 2 changed files with 14 additions and 15 deletions
design.tex
progress.tex
@@ -4,10 +4,9 @@
 \begin{figure}[t!]
 \centering
 \includegraphics[width=0.46\textwidth]{./figures/system-crop.pdf}
- \vspace*{3.015mm}
+ \vspace*{3mm}
 \caption{\textbf{System Components}}
 \label{fig:system}
- \vspace*{-2.85mm}
 \end{figure}
  
 \PS{} collects two types of measurements from clients---spectrum utilization,
@@ -16,11 +15,12 @@ ways---synchronously and asynchronously. Figure~\ref{fig:system} shows
 the main components of \PS{}.
  
 Idle smartphones can be used to improve nearby device's network performance. For
-example, in Figure~\ref{fig:system}, when \PS{} AP sends synchronous query about
-active device's spectrum condition, \PS{} clients, depending on device
-proximity, will perform detailed spectrum measurements on behalf of nearby
-devices. This information can then be feed into AP adaption algorithms for
-channel assignment, rate adaption or power control.
+example, in Figure~\ref{fig:system}, when \PS{} Access Point (AP) sends
+synchronous query about active device's spectrum condition, \PS{} clients,
+depending on proximity with interested device, will perform detailed spectrum measurements on
+behalf of nearby devices. This information can then be feed into AP adaption
+algorithms for channel assignment, rate adaption or power control---all without
+disturbing the active client.
  
 On other hand, to cope with rapidly-changing network environment caused by mobility,
 smartphones already perform aggressive network exploration and thus naturally
 \section{Current Progress}
 \label{sec:progress}
  
-We have set up a testbed of 4 programmable TP-LINK WDR3500 wireless routers
-running customized OpenWRT firmware, which we experiment with joint channel
+We have set up a testbed of 4 programmable APs
+running customized OpenWRT firmware, with which we experiment joint channel
 assignment, rate adaption and client association algorithms. On device side, we
-hacked \wifi{} driver of Nexus 5 devices to enable \wifi{} monitor mode. This
-enables the device to ``sniff'' the detailed spectrum utilization information.
-We are currently developing an \PS{} Android app. Besides sniffing, the app will
-also collect and upload network measurements such as \wifi{} scan results, RTT
-of \texttt{ping} requests, bandwidth etc. We plan to deploy our app on
-\PhoneLab{}, a large smartphone testbed operated at UB.
+modified \wifi{} driver of Nexus 5 devices to enable \wifi{} monitor mode, which
+provides more detailed spectrum utilization information. We are currently
+developing an \PS{} Android app. We are conducting small scale controlled
+experiments, and are also preparing to deploy our system on
+\PhoneLab{}---a large smartphone testbed operated at UB.