Changeset 2798

Timestamp:

10/30/09 17:49:24 (4 weeks ago)

Author:

jortiz

Message:

final draft, update 2

Location:

code/Multichannel/docs/mobisys/doc

Files:

• report.tex (modified) (3 diffs)
• results.tex (modified) (6 diffs)
• setupandmeth.tex (modified) (4 diffs)
• sexton.tex (modified) (1 diff)

code/Multichannel/docs/mobisys/doc/report.tex

@@ -22 +22 @@
 \usepackage{wasysym}
 %\usepackage[left=2.54cm,top=2.54cm,right=2.54cm,bottom=2.54cm,nohead,nofoot]{geometry}
-
+\usepackage[left=0.75in,top=1.0in,right=0.75in,bottom=1.0in,nohead,nofoot]{geometry}
 
 
@@ -101 +101 @@
 \author{
 \alignauthor
+Jorge Ortiz and David Culler\\
+       \affaddr{Computer Science Division}\\
+       \affaddr{University of California at Berkeley}\\
+       \email{\{jortiz,culler\}@cs.berkeley.edu}\\
 Paper \#1569261083 
-%Jorge Ortiz and David Culler\\
-%       \affaddr{Computer Science Division}\\
-%       \affaddr{University of California at Berkeley}\\
-%       \email{\{jortiz,culler\}@cs.berkeley.edu}
 }
 
@@ -121 +121 @@
 %\category{B.0}{Hardware}{General}
 %\category{B.4}{Hardware}{Input/Output \& Data Communication}
+\category{C.4}{Computer System Organization}{Performance of Systems}
 
-%\terms{Design, Implementation, Performance, Experimentation}
+\terms{Performance, Experimentation}
 
-%\keywords{Churn, Link, Routing, Wireless, Sensor Network, Mote}
+\keywords{Multichannel, Link, Routing, Wireless, Sensor Network}
 
 %\newpage

code/Multichannel/docs/mobisys/doc/results.tex

@@ -55 +55 @@
 by node placement, channel, link-quality threshold, and time.  We define a link between
 a pair of nodes as unidirectional if the PRR is greater than some threshold, $T$, in one direction 
-and less than $T$ in the other.  Although stranger criteria would be require a difference
+and less than $T$ in the other.  Although stronger criteria would be to require a difference
 of $\epsilon$ around threshold $T$, we allow even a small difference to be most generous to the
 prevalence of situations where FH provides benefit.  The vast majority of potential links
@@ -64 +64 @@
 %implies a threshold of 33\% PRR.
 
-In examining our connectivity graphs in all environments and thresholds between $T=1$ and $T=90$ with
+In examining our connectivity graphs in all environments and thresholds between $T=1\%$ and $T=90\%$ with
 a step of 10, we observed that 32-36\% of the links in the machine room are
 unidirectional, 18-34\% of the links in the computer room are unidirectional, and 10-46\% of 
@@ -279 +279 @@
 they occur so infrequently.
 Also observe the effects of thresholding on the MCT occurrence rate.  In the machine room, the occurrence
-rate increases by almost a factor of 6 from $T=1$ to $T=80$. Only 2 MCTs were found in the computer room
+rate increases by almost a factor of 6 from $T=1\%$ to $T=80\%$. Only 2 MCTs were found in the computer room
 and the testbed did not significant variations.
 
@@ -420 +420 @@
 \subsubsection{Channel Distribution}
 Table~\ref{tab:testbedroutingsoln} shows the associated routing solution count for each MCT found on
-testbed ($T=50$).  Notice, \emph{every MCT has a single-channel routing solution}.  The vast majority 
+testbed ($T=50\%$).  Notice, \emph{every MCT has a single-channel routing solution}.  The vast majority 
 of routing solutions are two hops in length.  Similar results are seen for all thresholds in each
 all environments tested.  This demonstrates that there is \emph{some channel} channel that provides
@@ -596 +596 @@
 }
 \caption[Optional caption for list of figures]{Single-channel to multichannel communication cost ratio
-comparison.  The connectivity graph constructed with threshold T=50 and the routing channel is 26.
+comparison.  The connectivity graph constructed with threshold $T=50\%$ and the routing channel is 26.
 }
 \label{fig:costratios}
@@ -655 +655 @@
 \end{tabular}
 \end{small}
-\caption{Cost ratio comparison for the machine room.  Threshold set to 50, routing solutions channel
+\caption{Cost ratio comparison for the machine room.  Threshold set to 50\%, routing solutions channel
 set to 26.}
 \label{tab:costratio_machine}

code/Multichannel/docs/mobisys/doc/setupandmeth.tex

@@ -66 +66 @@
 Figure~\ref{fig:basement_pic} shows a picture of the industrial setting and 
 figure~\ref{fig:basement_node_placement} shows the placement of nodes in the setting.  
-This environment consists of two rooms on a single floor that cover a 95x40 foot area.  
+This environment consists of two rooms on a single floor that cover a 95 ft x 40 ft area.  
 It is similar to those described in Sexton's study.  There are several moving engines 
 and pipes with material flowing through them.  There are also lots of metal
@@ -135 +135 @@
 Like the machine room, motes were placed in locations where sensing might take place.
 For example, motes were placed inside racks, near air conditioners, at the extremities of the
-room and at different heights.  The room is 28x28 feet and we placed 23 telosb motes throughout
+room and at different heights.  The room is 28 ft x 28 ft and we placed 23 telosb motes throughout
 the room.
 
@@ -151 +151 @@
 On the testbed, motes are placed to allow for full network connectivity.  This is the largest 
 of the 3 deployments we examined, with 55-60 MicaZ~\cite{MicaZ} motes. Floor dimensions are 
-128x128 feet and it is partitioned into multiple rooms in an office environment.
+128 ft x 128 ft and it is partitioned into multiple rooms in an office environment.
 Since the testbed is inside the computer science building of the university it sees
 lots of human traffic and 802.11 activity.   There are 7 access points 
@@ -187 +187 @@
 %Figure~\ref{fig:apclientcnt} shows the number of clients seen by all access points over 
 %the days that we ran our experiments.  
-We observe a daily frequency component in the data.  The worst time 
-for interference is in the afternoon.  Our experiments run throughout the entire day for over a week. 
-This allows us to compare connectivity graphs under a large range of duress from 
-external 802.11 interference.
+
+%We observe a daily frequency component in the data.  The worst time 
+%for interference is in the afternoon.  Our experiments run throughout the entire day for over a week. 
+%This allows us to compare connectivity graphs under a large range of duress from 
+%external 802.11 interference.
 
 

code/Multichannel/docs/mobisys/doc/sexton.tex

@@ -17 +17 @@
 and similar results were obtained in~\cite{propwireless}.
 
-The study also measures link quality.  Six motes were place in an industrial machine room
-measuring 43x66 feet.  The observed loss rate for every pair of
+The study also measures link quality.  Six motes were placed in an industrial machine room
+measuring 43 ft x 66 ft.  The observed loss rate for every pair of
 nodes on every channel in a machine room is reproduced in Figure~\ref{fig:sextonlinks}.
 A path $ij$ in the figure represents transmission from node $i$ to