The pdx/metrofi dataset (v. 2011-10-24)
Dataset of coverage and performance-related information of MetroFi, a 802.11x municipal wireless mesh network in Portland, Oregon in 2007.
Contributed by Russell Senior, Caleb Phillips.
This is a dataset of location, signal strength, and performance data of MetroFi, a 802.11x municipal wireless mesh network in Portland, Oregon in 2007. The data was collected by Caleb Phillips and Russell Senior to determine the coverage and performance of the network.
details of the pdx/metrofi dataset (v. 2011-10-24)
- last modified
- reason for most recent change
the initial version
- release date
- date/time of measurement start
- date/time of measurement end
- network type
- network type
wireless mesh network
- collection environment
The data was collected during an independent analysis of MetroFi, the municipal wireless network in Portland, Oregon.
- network configuration
This dataset was collected with a Linux-based sniffer using a Kismet instance configured to channel hop on all 11 channels. The wireless interface was an Atheros chipset using the madwifi driver. The 72 functional APs were located using triangulation and then fine-tuned with a hand-held GPS device. All measurements are passive, with no special access to the network.
- data collection methodology
We use the standard Unix tools ttcp to test upstream throughput, ICMP ping to test latency and loss, and wget to test downstream throughput. A small script was used to bypass advertisement traps. We also found it necessary to use several watchdog scripts to check for a lost association, GPS issues, and stalled tests. Depending on the results, a random location test might take anywhere from about 60 seconds (the length of time we would wait for an association) to around 7 minutes. We also recorded GPS position and timestamp throughout the test.
The results of each test were stored on the USB storage device. At the conclusion of the tests we retrieved and analyzed the results.
This network is now defunct, and all the APs have been dismantled. Hence, we have performed no anonymization as there is no conceivable privacy/anonymity risk to anyone or anything.
This dataset contains the following traceset:
Traceset of coverage and performance-related information of MetroFi, a 802.11x municipal wireless mesh network in Portland, Oregon in 2007.
quick access to download the traceset
- download the metrofi.tar.gz (from the pdx/metrofi/2007 trace) file
- from a CRAWDAD mirror: US UK
size="804KB" type="gz" md5="91389493d934d5365f1eb6a095298a0c"
- Russell Senior
- Caleb Phillips
how to cite this dataset
When writing a paper that uses CRAWDAD datasets, we would appreciate it if you could cite both the authors of the dataset and CRAWDAD itself, and identify the exact dataset using the appropriate version number. For this dataset, this citation would look like:
Russell Senior, Caleb Phillips, CRAWDAD dataset pdx/metrofi (v. 2011‑10‑24), downloaded from https://crawdad.org/pdx/metrofi/20111024, https://doi.org/10.15783/C7RC7X, Oct 2011.
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