Changes between Initial Version and Version 1 of WiMAX/30/02

Timestamp:

May 5, 2011, 2:37:34 PM (13 years ago)

Author:

seskar

Comment:

—

WiMAX/30/02

@@ +1 @@
+= A guide to wimax measurement application: wimax_gps_oml2 =
+== Description ==
+Collects Wimax radio link parameters with corresponding GPS coordinates and sends to OML server.
+The following parameters are recorded and sent to the OML server: Center frequency, RSSI, CINR, Transmit power, Time from GPS, Latidute, Longitude, Altitude.
+
+== Software Requirements ==
+1. ''wimaxcu'' : Wimax radio utility. Must be installed on machine to operate wimax radio.
+
+2. ''oml2-server'': OML measurement collection server. Note: this server may be locally installed on the mobile.
+
+3. ''gpsd'': GPS service daemon running locally. Information on ''gpsd'' can be found on http://gpsd.berlios.de/
+
+4. ''wimax_gps_oml2'': Wimax measurement application.
+
+== Hardware Requirements ==
+1. ''GPS receiver'': for example a Garmin USB Receiver -  model#: GPS18x-5Hz. Other compatible GPS models can be found on http://gpsd.berlios.de/hardware.html
+
+== Installation / setup procedures ==
+1. Edit the '''/etc/apt/sources.list''' and add the following line:
+{{{
+deb http://packages.orbit-lab.org/ubuntu jaunty main
+deb http://pkg.mytestbed.net/ubuntu maverick/
+}}}
+
+2. Update information based on the changed sources.list.
+{{{
+sudo apt-get update
+}}}
+
+3. Install the wimaxcu utility if not already installed, then reboot the machine
+{{{
+sudo apt-get install wimaxcu-1.0
+reboot
+}}}
+
+4. Run the following commands to start wimax daemon service, and operate wimax radio
+{{{
+wimaxd -i wmx0 -b
+
+wimaxcu ron
+wimaxcu scan
+wimaxcu connect network 51
+}}}
+
+5. Install the Wimax measurement application (wimax_gps_oml2) and the GPS Daemon (gpsd)
+{{{
+sudo apt-get install wimax-gps-oml2
+}}}
+
+6. If measurements are to be collected locally install the oml2-server otherwise this step may be skipped.
+{{{
+sudo apt-get install oml2-server
+}}}
+
+7. Attach GPS receiver to mobile. At this point please refer to http://gpsd.berlios.de/troubleshooting.html and verify that GPS is able to send data and also able to talk to ''gpsd''.
+
+
+== Usage ==
+1. Refer to http://gpsd.berlios.de/troubleshooting.html and verify the GPS receiver is able to send data and also able to talk to ''gpsd''.
+
+2. Verify ''oml2-server'' is running
+{{{
+ps -elf | grep oml2-server
+}}}
+
+If needed restart oml2-server:
+{{{
+/etc/init.d/oml2-server restart
+}}}
+
+3. Verify ''gpsd'' is running
+{{{
+ps -elf | grep gpsd
+}}}
+
+If needed restart gpsd. Note: /dev/tty* name may be different. Refer to gpsd troubleshooting to find correct /dev/tty* name. This will start gpsd as a daemon.
+{{{
+gpsd /var/run.gpsd.sock /dev/ttyUSB0
+}}}
+
+4. Run ''wimax_gps_oml2'' collection application.
+{{{
+./wimax_gps_oml2 --oml-id 4 --oml-exp-id exp4 --oml-server localhost:3003
+}}}
+This will create an sqlite database file (exp4.sq3) on the oml server.
+
+== Troubleshooting GPS Service Daemon ==
+Please refer to troubleshooting ''gpsd'' please refer to http://gpsd.berlios.de/troubleshooting.html.
+
+== Sample data ==
+Here's a snapshot of drive data collected around the Wimax BS at Rugters Winlab. This is the RSSI drive data.
+
+[[Image(gps_drive_rssi.png)]]
+
+The following is the CINR drive data.
+
+[[Image(GpsDriveCinr.png)]]
+
+
+== Post processing data ==
+After the application is run, it'll create an sql file on the oml server. Processing this file to extract the measured data can be done in several ways. The steps outlined here can be used to generate the image shown above.
+
+1. Process the sql file into delimited ascii text.
+{{{
+sqlite3 exp4.sq3 "select * from wimax_measurements;" > exp4.dat
+}}}
+
+2. Extract the rssi field from delimited ascii text file. This was done via awk script: [http://www.orbit-lab.org/attachment/wiki/Documentation/WiMaxApp/rssi.awk rssi.awk]
+{{{
+awk -f rssi.awk exp4.dat > exp4_rssi.dat
+}}}
+
+3. Use [http://www.gpsvisualizer.com/map_input?form=google gpsvisualizer] to plot exp4_rssi.dat.
+
+ * Under ''Upload your GPS data files'' for ''File #1'' select exp4_rssi.dat.
+ * Under ''Track options'' for ''Colorize by'' select ''custom field'' from the pull down. Once the ''Custom colorization field'' appears enter ''rssi''.
+ * Finally click ''Draw the map''