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added experimental per destination propagation delay in radio connections. uses cooja time events to delay radio events.

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currently only delaying the four main events: reception started, packet delivery, byte delivery, and reception ended

note that propagation delay is not yet implemented for all radio events - interfered radios will for example still be interfered immediately
This commit is contained in:
fros4943 2009-02-24 15:12:22 +00:00
parent 28ace6d912
commit e87d94439e
1 changed files with 80 additions and 7 deletions
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81
tools/cooja/java/se/sics/cooja/radiomediums/AbstractRadioMedium.java
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: AbstractRadioMedium.java,v 1.6 2009/02/21 09:49:51 fros4943 Exp $
* $Id: AbstractRadioMedium.java,v 1.7 2009/02/24 15:12:22 fros4943 Exp $
*/
package se.sics.cooja.radiomediums;
@ -57,10 +57,16 @@ public abstract class AbstractRadioMedium extends RadioMedium {
private boolean isTickObserver = false;
private class RadioMediumObservable extends Observable {
private void setRadioMediumChanged() {
private Simulation simulation = null;
public class RadioMediumObservable extends Observable {
public void setRadioMediumChanged() {
setChanged();
}
public void setRadioMediumChangedAndNotify() {
setChanged();
notifyObservers();
}
}
private RadioMediumObservable radioMediumObservable = new RadioMediumObservable();
@ -73,6 +79,7 @@ public abstract class AbstractRadioMedium extends RadioMedium {
* @param simulation Simulation
*/
public AbstractRadioMedium(Simulation simulation) {
this.simulation = simulation;
}
/**
@ -193,6 +200,24 @@ public abstract class AbstractRadioMedium extends RadioMedium {
RadioConnection newConnection = createConnections(radio);
if (newConnection != null) {
activeConnections.add(newConnection);
for (Radio r: newConnection.getDestinations()) {
if (newConnection.getDestinationDelay(r) == 0) {
r.signalReceptionStart();
} else {
/* EXPERIMENTAL: Simulating propagation delay */
final Radio delayedRadio = r;
TimeEvent delayedEvent = new TimeEvent(0) {
public void execute(long t) {
delayedRadio.signalReceptionStart();
}
};
simulation.scheduleEvent(
delayedEvent,
simulation.getSimulationTime() + newConnection.getDestinationDelay(r));
}
}
}
// Recalculate signal strengths on all radios
@ -219,7 +244,22 @@ public abstract class AbstractRadioMedium extends RadioMedium {
activeConnections.remove(connection);
finishedConnections.add(connection);
for (Radio dstRadio : connection.getDestinations()) {
if (connection.getDestinationDelay(dstRadio) == 0) {
dstRadio.signalReceptionEnd();
} else {
/* EXPERIMENTAL: Simulating propagation delay */
final Radio delayedRadio = dstRadio;
TimeEvent delayedEvent = new TimeEvent(0) {
public void execute(long t) {
delayedRadio.signalReceptionEnd();
}
};
simulation.scheduleEvent(
delayedEvent,
simulation.getSimulationTime() + connection.getDestinationDelay(dstRadio));
}
}
for (Radio dstRadio : connection.getInterfered()) {
dstRadio.signalReceptionEnd();
@ -256,7 +296,23 @@ public abstract class AbstractRadioMedium extends RadioMedium {
for (Radio dstRadio : connection.getDestinations()) {
if (dstRadio instanceof CustomDataRadio) {
if (connection.getDestinationDelay(dstRadio) == 0) {
((CustomDataRadio) dstRadio).receiveCustomData(data);
} else {
/* EXPERIMENTAL: Simulating propagation delay */
final CustomDataRadio delayedRadio = (CustomDataRadio) dstRadio;
final Object delayedData = data;
TimeEvent delayedEvent = new TimeEvent(0) {
public void execute(long t) {
delayedRadio.receiveCustomData(delayedData);
}
};
simulation.scheduleEvent(
delayedEvent,
simulation.getSimulationTime() + connection.getDestinationDelay(dstRadio));
}
}
}
@ -284,8 +340,25 @@ public abstract class AbstractRadioMedium extends RadioMedium {
Radio srcRadio = connection.getSource();
for (Radio dstRadio : connection.getDestinations()) {
if (!(srcRadio instanceof CustomDataRadio) || !(dstRadio instanceof CustomDataRadio)) {
if (!(srcRadio instanceof CustomDataRadio) ||
!(dstRadio instanceof CustomDataRadio)) {
if (connection.getDestinationDelay(dstRadio) == 0) {
dstRadio.setReceivedPacket(packet);
} else {
/* EXPERIMENTAL: Simulating propagation delay */
final Radio delayedRadio = dstRadio;
final RadioPacket delayedPacket = packet;
TimeEvent delayedEvent = new TimeEvent(0) {
public void execute(long t) {
delayedRadio.setReceivedPacket(delayedPacket);
}
};
simulation.scheduleEvent(
delayedEvent,
simulation.getSimulationTime() + connection.getDestinationDelay(dstRadio));
}
}
}