dartmouth/outdoor

Citation Author(s):
Robert
Gray
BAE Systems
David
Kotz
Dartmouth College
Calvin
Newport
MIT
Nikita
Dubrovsky
Aaron
Fiske
Jason
Liu
Florida International University
Christopher
Masone
Dartmouth College
Susan
McGrath
Dartmouth College
Yougu
Yuan
Submitted by:
Stephen Gaughan
Last updated:
Tue, 11/28/2006 - 07:00
DOI:
10.15783/C7301Z
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License:
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Abstract 

MANET dataset of outdoor experments for comparing differnet routing algorithms.

This dataset contains outdoor runs of MANET (Mobile Ad-hoc network) routing algorithms to compare the performance of four different routing algorithms.

 https://doi.org/10.15783/C7301Z Nov 2006

Instructions: 

collection environment

Most comparisons of wireless ad hoc routing algorithms involve simulated or indoor trial runs, or outdoor runs with only a small number of nodes, potentially leading to an incorrect picture of algorithm performance. For outdoor comparison of four different routing algorithms, APRL, AODV, ODMRP, and STARA, we run on top of thirty-three 802.11-enabled laptops moving randomly through an athletic field. This comparison provides insight into the behavior of ad hoc routing algorithms at larger real-world scales than have been considered so far.

The outdoor routing experiment took place on a rectangular athletic field measuring approximately 225 (north-south) by 365 (eastwest) meters. This field can be roughly divided into four flat, equalsized sections, three of which are at the same altitude, and one of which (at the southeast corner) is approximately four to six meters lower. There was a short, steep slope between the upper and lower sections. We chose this particular athletic field because it was physically distant from campus and the campus wireless network, reducing potential interference.

network configuration

We configured the 802.11 cards to use wireless channel 9 for maximum separation from the standard channels of 1, 6 and 11, further reducing potential interference. We used 41 laptops, 40 as application laptops, and one as a control laptop.

The routing experiments ran on top of a set of 41 Gateway Solo 9300 laptops, each with a 10GB disk, 128MB of main memory, and a 500MHz Intel Pentium III CPU with 256KB of cache. We used one laptop to control each experiment, leaving 40 laptops to actually run the ad hoc routing algorithms. Each laptop ran Linux kernel version 2.2.19 with PCMCIA card manager version 3.2.4 and had a Lucent (Orinoco) Wavelan Turbo Gold 802.11b wireless card. Although these cards can transmit at different bit rates, can auto-adjust this bit rate depending on the observed signal-to-noise ratio, and can auto-adjust the channel to arrive at a consistent channel for all the nodes in the ad hoc network, we used an ad hoc mode in which the transmission rate was fixed at 2 Mb/s, and in which the channel could be chosen manually but was fixed thereafter. Specifically, we used Lucent (Orinoco) firmware version 4.32 and the proprietary ad hoc "demo" mode originally developed by Lucent.

Although the demo mode has been deprecated in favor of the IEEEdefined IBSS, we used the demo mode to ensure consistency with a series of ad hoc routing experiments of which this outdoor experiment was a culminating event. 6 The fixed rate also made it much easier to analyze the routing results, since we did not need to account for automatic changes in each card's transmission rate. On the other hand, we would expect to see variation in the routing results if we had used IBSS instead, both due to its multi-rate capabilities and its general improvements over the demo mode. The routing results remain representative, however, since demo mode provides sufficient functionality to serve as a reasonable data-link layer. Finally, each laptop had a Garmin eTrex GPS unit attached via the serial port. These GPS units did not have differential GPS capabilities, but were accurate to within thirty feet during the experiment.

data collection methodology

We log the events of routing algorithms in each laptop. A GPS service runs on each laptop, reading and recording the current laptop position from the attached GPS unit.

disruptions to data collection

During the experiment, seven laptops generated no network traffic due to hardware and configuration issues, and an eighth laptop generated the position beacons only for the first half of the experiment. The seven complete failures left thirty-three laptops actually participating in the ad hoc routing.

This dataset contains the following traceset:

1.routing

Traceset of outdoor MANET experments for comparing differnet routing algorithms.

last modified

2006-11-28

reason for most recent change

the initial version

release date

2006-11-06

date/time of measurement start

2003-10-17

date/time of measurement end

2003-10-17

network type

802.11 ad-hoc

 

This dataset is part of the CRAWDAD archive. CRAWDAD is the Community Resource for Archiving Wireless Data At Dartmouth, a wireless network data resource for the research community. This archive was created to store wireless trace data from many contributing locations, and staff to develop better tools for collecting, anonymizing, and analyzing the data. The CRAWDAD archive was originally created and maintained by Dartmouth College and can now be on found on IEEE DataPort