uprm/wireless2006041248200604122008-09-24uprm/wirelessDataset of wireless signal strength measurements from the University of Puerto Rico.

This data set contains a collection of wireless traces from the University of Puerto Rico. Wireless signal strength measurements for Dell and Thinkpad laptops were performed over distances of 500 feet and one mile. The data is presented in .cap files giving TCP dump packet headers.

the initial version2006-04-122006-01-242006-01-24UMass Trace Repository168169185170171http://traces.cs.umass.edu/index.php/Network/Networkhttp://www.crawdad.org/wiki/pmwiki.php?n=Main.Dataset.uprm-wireless802.11signal strengthtcpdumpNetwork Performance Analysis802.11 ad-hocA collection of wireless traces from Jan 24th 2006 at the University of Puerto Rico. Contains wireless signal strength measurements for Dell and Thinkpad laptops. These traces were gathered as part of an undergraduate course taught by Jim Kurose and Mike Zink.Wireless signal strength was measured between two Linux laptops - Dell and Thinkpad. Each machine is equippted with a Proxim Orinoco 11b/g PC Card, an antenna of either Yagi 14 dBi, Parabolic Disk 24 dBi, or Parabolic Disk 30 dBi.Tests were performed over distances of 500 feet and one mile. Data is presented in .cap files giving tcpdump packet headers./download/uprm/wireless/uprm-wireless-traces.tar.gz76200604122008-09-24the initial version.uprm/wireless/short_linkTraceset of wireless signal strength measurements over distances of 500 feet from the University of Puerto Rico.

This traceset contains a collection of wireless traces from the University of Puerto Rico, where wireless signal strength measurements for Dell and Thinkpad laptops were performed over distances of 500 feet.

2006-04-122006-01-242006-01-24Network Performance AnalysisWe began this experiment at ~ 10:00. Tests 1 to 8 were performed from rooftop to rooftop of 2 close buildings, approx. 500' apart. The goal was essentially to get everyone familiar with the equipment and go over Linux commands, and make sure the equipment was working properly. We performed some iperf tests over this link with several different scenarios.uprm/wireless229200604122008-09-24the initial versionuprm/wireless/short_link/trace_1Trace of wireless signal strength measurement - test 1 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 1 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24This was our first test, with the default wireless settings. Link Quality was around 30/94. We performed iperf with default settings also. Files: thinkpad/test1_tcp, dell/initial_default.captcpdumpuprm/wireless/short_link230200604122008-09-24the initial versionuprm/wireless/short_link/trace_2Trace of wireless signal strength measurement - test 2 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 2 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24We noticed approx. 20 other access points when doing a scan, so we decided to switch to ch11. Signal strength improved to about 50/94, used default iperf commands. Files: thinkpad/test2_ch11_tcp, dell/default_ch_11.captcpdumpuprm/wireless/short_link231200604122008-09-24the initial versionuprm/wireless/short_link/trace_3Trace of wireless signal strength measurement - test 3 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 3 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24In this test we performed an iperf test with UDP, signal strength at 50/94. During the test we realized that we lost the connection. Files: thinkpad/test3_ch11_udp, dell/ch_11_udp.captcpdumpuprm/wireless/short_link232200604122008-09-24the initial versionuprm/wireless/short_link/trace_4Trace of wireless signal strength measurement - test 4 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 4 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24We reset the cards and ran the previous test again. This time it was successful, we utilized almost all the bandwidth. Files: thinkpad/test4_ch11_udp, dell/ch_11_udp_2nd_try.captcpdumpuprm/wireless/short_link233200604122008-09-24the initial versionuprm/wireless/short_link/trace_5Trace of wireless signal strength measurement - test 5 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 5 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24For this test, we set the distance for the wireless drivers with the athctrl utility to 1 meter. We ran iperf with UDP. We realized that the utility had not been run on both sides of the link. Signal strength was around 54/94. Files: thinkpad/test5_ch11_udp, dell/udp_1_meter.captcpdumpuprm/wireless/short_link234200604122008-09-24the initial versionuprm/wireless/short_link/trace_6Trace of wireless signal strength measurement - test 6 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 6 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24Here we corrected for the issue in trace_5, both sides of the link now had the distance for the drivers set to 1 meter. Signal strength was around 54/94. Files: thinkpad/test6_ch11_udp_1meter, dell/udp_1_meter_both_sides.captcpdumpuprm/wireless/short_link235200604122008-09-24the initial versionuprm/wireless/short_link/trace_7Trace of wireless signal strength measurement - test 7 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 7 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24We ran the previous test (test_6), with the drivers for both cards set to 1 meter, and ran iperf with TCP. Signal strength was around 54/94. Files: thinkpad/test7_ch11_tcp_1meter, dell/tcp_1_meter_both_sides.captcpdumpuprm/wireless/short_link236200604122008-09-24the initial versionuprm/wireless/short_link/trace_8Trace of wireless signal strength measurement - test 8 - over distances of 500 feet.

Trace of wireless signal strength measurement - test 8 - over distances of 500 feet.

false2006-04-122006-01-242006-01-24In this trace we tested the strength of the signal of the side lobes by turning the antennas 90 degrees in one direction, and then 90 degrees in the other direction. Our signal strength at 90 degrees was around 39/94 and the direct signal strength averaged 55/94. Files: thinkpad/test8_ch11_tcp_1meter_side, dell/tcp_1_meter_side_lobe.captcpdumpuprm/wireless/short_link77200604122008-09-24the initial version.uprm/wireless/long_distance_linkTraceset of wireless signal strength measurements over distances of one mile from the University of Puerto Rico.

This traceset contains a collection of wireless traces from the University of Puerto Rico, where wireless signal strength measurements for Dell and Thinkpad laptops were performed over distances of one mile.

2006-04-122006-01-242006-01-24Network Performance AnalysisWireless traces from Jan 24th 2006 at UPRM Mayaguez Puerto Rico. After lunch we performed tests 9 - 22 from rooftop to rooftop over a link approx. 1 mile. We made measurements using iperf, and recorded two sessions transferring some radar data.uprm/wireless238200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_9Trace of wireless signal strength measurement - test 9 - over distances of one mile.

Trace of wireless signal strength measurement - test 9 - over distances of one mile.

false2006-04-122006-01-242006-01-24<bad capture> - we had trouble with this one (no connection/signal faded). There is no corresponding trace on the dell. We had some setup issues when trying to get the long distance link up. Files: thinkpad/longtest9_tcp_2000mtcpdumpuprm/wireless/long_distance_link239200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_10Trace of wireless signal strength measurement - test 10 - over distances of one mile.

Trace of wireless signal strength measurement - test 10 - over distances of one mile.

false2006-04-122006-01-242006-01-24This was our first test after making a connection on the long distance link. We set the drivers of both wireless cards to 2,000 meters using the athctrl utility. Signal strength was around 30/94. We ran iperf with TCP. Files: thinkpad/longtest10_tcp_2000m, dell/longdistance/first_test.captcpdumpuprm/wireless/long_distance_link240200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_11Trace of wireless signal strength measurement - test 11 - over distances of one mile.

Trace of wireless signal strength measurement - test 11 - over distances of one mile.

false2006-04-122006-01-242006-01-24We tested setting the distance higher, this time we set it to 5000 meters over-shooting the distance to see what would happened. Signal strength dropped slightly. We ran iperf with TCP Files: thinkpad/longtest11_tcp_5000m, dell/longdistance/tcp_5000.captcpdumpuprm/wireless/long_distance_link241200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_12Trace of wireless signal strength measurement - test 12 - over distances of one mile.

Trace of wireless signal strength measurement - test 12 - over distances of one mile.

false2006-04-122006-01-242006-01-24Now we adjusted the distance to 1600 meters, which was more accurate. We ran iperf with TCP. Files: thinkpad/longtest12_tcp_1600m, dell/longdistance/tcp_1600.captcpdumpuprm/wireless/long_distance_link242200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_13Trace of wireless signal strength measurement - test 13 - over distances of one mile.

Trace of wireless signal strength measurement - test 13 - over distances of one mile.

false2006-04-122006-01-242006-01-24We tested setting the distance at various intervals, here it was set to 1000 meters and we ran iperf with TCP. Files: thinkpad/longtest13_tcp_1000m, dell/longdistance/tcp_1000.captcpdumpuprm/wireless/long_distance_link243200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_14Trace of wireless signal strength measurement - test 14 - over distances of one mile.

Trace of wireless signal strength measurement - test 14 - over distances of one mile.

false2006-04-122006-01-242006-01-24In this test the distance was set to 1000 meters and we ran iperf with TCP. Files: thinkpad/longtest13_tcp_500m, dell/longdistance/tcp_500.captcpdumpuprm/wireless/long_distance_link244200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_15Trace of wireless signal strength measurement - test 15 - over distances of one mile.

Trace of wireless signal strength measurement - test 15 - over distances of one mile.

false2006-04-122006-01-242006-01-24For this test we set the distance back to 1600 meters, where we had seen the best performance. This time we transferred 40MB of data with iperf using TCP. Signal strength was approx. 39/94 Files: thinkpad/longtest14_tcp_1600m_40MB, dell/longdistance/tcp_40m_1600.captcpdumpuprm/wireless/long_distance_link245200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_16Trace of wireless signal strength measurement - test 16 - over distances of one mile.

Trace of wireless signal strength measurement - test 16 - over distances of one mile.

false2006-04-122006-01-242006-01-24For this test, we used the same distance, 1600 meters and with 40MB of data, using UDP. There were some issues on the Dell side which required a reboot. Files: thinkpad/longtest15_udp_1600m, dell/longdistance/udp_1600_2.captcpdumpuprm/wireless/long_distance_link246200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_17Trace of wireless signal strength measurement - test 17 - over distances of one mile.

Trace of wireless signal strength measurement - test 17 - over distances of one mile.

false2006-04-122006-01-242006-01-24We ran the previous test (trace_16) over again. Files: thinkpad/longtest16_udp_1600m, dell/longdistance/udp_1600_3.captcpdumpuprm/wireless/long_distance_link247200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_18Trace of wireless signal strength measurement - test 18 - over distances of one mile.

Trace of wireless signal strength measurement - test 18 - over distances of one mile.

false2006-04-122006-01-242006-01-24<bad capture> something went wrong and not enough data was captured in the trace. Files: thinkpad/longtest17_udp_1600m, dell/longdistance/udp_1600_chan_11.captcpdumpuprm/wireless/long_distance_link248200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_19Trace of wireless signal strength measurement - test 19 - over distances of one mile.

Trace of wireless signal strength measurement - test 19 - over distances of one mile.

false2006-04-122006-01-242006-01-24<bad capture> something went wrong and not enough data was captured in the trace. Files: thinkpad/longtest19_udp_800m_ch11, dell/longdistance/afterreboot/udp_800.captcpdumpuprm/wireless/long_distance_link249200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_20Trace of wireless signal strength measurement - test 20 - over distances of one mile.

Trace of wireless signal strength measurement - test 20 - over distances of one mile.

false2006-04-122006-01-242006-01-24<bad capture> something went wrong and not enough data was captured in the trace. Files: thinkpad/longtest20_udp_1600m_ch11tcpdumpuprm/wireless/long_distance_link250200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_21Trace of wireless signal strength measurement - test 21 - over distances of one mile.

Trace of wireless signal strength measurement - test 21 - over distances of one mile.

false2006-04-122006-01-242006-01-24We transferred a large file consisting of radar data using ftp over the link. Signal strength was about 39/94 and we had both cards set to a distance of 1600 meters. Files: thinkpad/longtest21_radardata_1600m_ch11, dell/longdistance/ftp_xfr.captcpdumpuprm/wireless/long_distance_link251200604122008-09-24the initial versionuprm/wireless/long_distance_link/trace_22Trace of wireless signal strength measurement - test 22 - over distances of one mile.

Trace of wireless signal strength measurement - test 22 - over distances of one mile.

false2006-04-122006-01-242006-01-24In this test we transferred 1GB of radar data via ftp with the drivers set to a distance of 1600 meters. There was an issue on the Dell side which resulted in no capture, but we have data from the ThinkPad side. Files: thinkpad/longtest22_1GB_radardata_1600m_ch11tcpdumpuprm/wireless/long_distance_link168uprm/wirelessTimothy Irelandtireland@student.umass.eduUniversity of MassachusettsComputer ScienceStudent

Department of Computer Science, University of Massachusetts, Amherst MA 01003 USA

169uprm/wirelessAdam Nyzioanyzio@student.umass.eduUniversity of MassachusettsComputer ScienceStudent

Department of Computer Science, University of Massachusetts, Amherst MA 01003 USA

185uprm/wirelessBrian C. Donovanbdonovan@ecs.umass.eduUniversity of MassachusettsElectrical and Computer Engineering Department

Electrical and Computer Engineering Department, University of Massachusetts, Amherst MA 01003 USA

170uprm/wirelessMichael Zinkzink@cs.umass.eduUniversity of MassachusettsComputer ScienceSenior Research Scientist

Department of Computer Science, University of Massachusetts, Amherst MA 01003 USA

413-545-4465http://www-net.cs.umass.edu/~zink/umasshome/pmwiki.php171uprm/wirelessJim Kurosekurose@cs.umass.eduUniversity of MassachusettsComputer ScienceProfessor

Department of Computer Science, University of Massachusetts, Amherst MA 01003 USA

413-545-1585413-545-1249http://www-net.cs.umass.edu/personnel/kurose.html