Changes between Initial Version and Version 1 of Tutorials/c0WiFi/Tutorial2

Timestamp:

Nov 23, 2005, 7:51:08 PM (18 years ago)

Author:

Surya Satyavolu

Comment:

—

Tutorials/c0WiFi/Tutorial2

@@ +1 @@
+[wiki:WikiStart Orbit] > [wiki:Tutorial Tutorial] > Using Noise Generator
+
+= Using Noise Generator in Experiments =
+
+The main idea is this:
+
+Along with node definitions in the first part of the experiment script,
+you also define the antenna to be a part of the experiment
+
+The antennas are located here:
+  * Antenna 1: Between node2-1 and node2-2
+  * Antenna 2: Between node2-7 and node2-8
+  * Antenna 3: Between node7-1 and node7-2
+  * Antenna 4: Between node7-7 and node7-8.
+
+Attached is a template script to use the noise generator. Please use tutorial-noise.rb as a baseline
+
+The configurable parameters are
+  * channel on which you want to operate: 
+    Valid channels are 1..11, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157 and 161
+  * Noise power on these channels: Limits are from -90 dBm to +5 dBm
+
+Here is a template script to use the noise generator
+{{{
+Experiment.name = "tutorial-1a"
+Experiment.project = "orbit:tutorial"
+Experiment.defProperty('noisePower', -44, 'Noise level injected')
+#
+# Define nodes used in experiment
+#
+defNodes('sender', [1,2]) {|node|
+  node.image = nil  # assume the right image to be on disk
+  node.prototype("test:proto:sender", {
+    'destinationHost' => '192.168.1.1',
+    'packetSize' => 1024,
+    'rate' => 300,
+    'protocol' => 'udp'
+  })
+  node.net.w0.mode = "master"
+}
+
+defNodes('receiver', [1,1]) {|node|
+  node.image = nil  # assume the right image to be on disk
+  node.prototype("test:proto:receiver" , {
+    'hostname' => '192.168.1.1',
+    'protocol' => 'udp'
+  })
+  node.net.w0.mode = "managed"
+}
+
+allNodes.net.w0 { |w|
+  w.type = 'b'
+  w.essid = "helloworld"
+}
+
+antenna(4,4).signal {|s|
+  s.bandwidth = 20
+  s.channel = 36
+  s.power = prop.noisePower
+}
+#
+# Now, start the application
+#
+whenAllInstalled() {|node|
+
+  #Then start receiver and sender
+  NodeSet['receiver'].startApplications
+  wait 30
+  NodeSet['sender'].startApplications
+
+  antenna(4,4).signal.on
+
+  # Step noise power from -44 to 0dbm in steps of 4db
+  -44.step(0, 4) { |p|
+
+    prop.noisePower = p
+     wait 5
+   }
+  wait 10
+  Experiment.done
+}                             
+
+}}}